Construction organization design of wrought iron fence

Construction organization design of wrought iron fence

Chapter I Project Overview

Project name: Building 38, Graduate Apartment, Xiasha Campus, Hangzhou Dianzi University

Construction unit: Hangzhou Dianzi University

Design unit: Zhejiang Urban Construction Architectural Design Institute

Supervision unit: Nanjing Huaning Engineering Supervision Company

Construction unit: Shaoxing First Construction Engineering Group Co., Ltd.

Project location: Block G, Xigong Logistics Facilities Public Construction Project, Xiasha Higher Education Park, Hangzhou

The project is located at the intersection of Xuelin Street and Jinwen Road in Xiasha Higher Education Park, Hangzhou, and is a common frame-shear wall structure.

Chapter II Wall Layout

1. On the west side of the site, this project is the student dormitory of the Engineering College. The original 2.5-meter-high wall was painted and renovated this time. To the north is the student dormitory of Metrology College, with the original color steel wall. In the south, the construction site of Wakayama Construction Company is isolated by colored steel plates. Jinwen Road is in the north. The bottom of the brick fence is 30 cm high, and the upper part is colored steel plate, which is fixed with square steel. The gate is set in the south, and the roads in and out of Wakayama Construction Company are lined with brick walls and graffiti.

2. According to the company's unified requirements, set up wall coping and door light boxes, and do a good job in lighting engineering.

Chapter III Calculation of Wall Structure

1. Checking calculation of overturning stability of wall (see figure for geometric dimensions)

b/kψH =

= 17x 0.24/ 1. 12x 0.3

=2.9 (m) > 2.5m meets the requirements.

Where: K- overturning safety factor, wall thickness 240, k =1.12;

ψ-wind load, which is taken as ψ = 0.3 kn/㎡ according to the local basic wind pressure.

H—— Allowable free height of brick masonry

-Brick masonry is heavy.

B- wall thickness

2. Calculation of height-thickness ratio (see attached figure for geometric dimensions)

The geometric dimensions of the wall sections are shown in the attached drawings.

Cross-sectional area A = 5000× 240+240×120 =1228800 mm.

Gravity axis Y 1=∑ (Ai Yi)/a.

=(5000×240× 120+ 120×240×300)÷ 1228800 = 124mm

Y2 = 360-124 = 236mm.

Moment of inertia I=∑(I0+Aa)

= 1/ 12×5000×2403+5000×240×( 124- 12×240× 1203×(236-60)= 1.628× 1065438+

Radius of gyration I = (I/a)1/2 = (1.628×101/228800)1/2.

=364 mm

The converted wall thickness ht = 3.5i = 364× 3.5 = 1274mm.

(2), the whole wall height-thickness ratio calculation

Take h0 = h0 = H0=H=2.5m

The aspect ratio β = h0/ht = 2.5/1.274 =1.96.

Let μ1=1.2μ 2 =1.

μ1μ 2 [β] =1.2×1× 24 = 28.8 ~1.96 meets the requirements.

(3) Height-thickness ratio between pilasters (calculated according to rigid scheme)

H0=0.4s+0.2H=2+0.5=2.5 m

The aspect ratio β = 2.5/0.24 = 10.4 ~ 28.8 meets the requirements.

④ Checking calculation of bearing capacity of foundation soil

Self-weight of wall n = [2.5× 0.24+0.36× (0.06+0.12) ]×17+0.56× 0.3× 23 =15.17kn 𐀑.

Where: fk-standard value of bearing capacity of foundation soil.

The fourth chapter fence practice

1. Tamp the plain soil after excavation.

2, using rubble foundation, M5 mixed mortar masonry.

3. The fence is built with M 10 standard brick and M5 mixed mortar.

4. The main gate brick column is built with 500*500MM and 5M high standard brick cement mortar.

5. Set a brick fence post every 5 meters.

6. Double-sided brush for fence.

Chapter V Matters needing attention

1, it is forbidden to pile up loose materials such as sand near the fence.

2. Strictly prevent the fence foundation from being strongly washed by rain.

Construction organization design of affiliated fence project

I. Project Overview and Construction Conditions

This project is a subsidiary fence project, which is undertaken by the engineering company.

(1) General situation of the building:

The main building practices are as follows:

1, wall: 10CM thick C 10 concrete cushion, below +0.00, MU 10 standard brick and M7.5 cement mortar are used for masonry; +0.00 above, using MU 10 standard brick, M7.5 mixed mortar masonry;

(II) Overview of the structure:

1, basis

Below +0.00, 10CM thick C 10 concrete cushion, MU 10 standard brick and M7.5 cement mortar shall be used for masonry.

2. Wall:

(1) masonry materials:

Below 0.00 m, MU 10 standard brick and M7.5 cement mortar are used for masonry.

More than+/-0.00 m shall be built with MU 10 standard brick and M7.5 mixed mortar;

(2) Variety and label of masonry mortar

M7.5 cement mortar is used below 0.00 meters.

M7.5 mixed mortar shall be used above 0.00 meters. ..

Internal and external mixed mortar brush M 10, 2CM.

(3) Construction conditions

1, water and electricity are basically in place, and the site service road is flat.

2, mechanical equipment and construction personnel arrangement

Equipped with two 350 mixers, its mechanical properties and coverage can meet the construction requirements after calculation. See the attached table for the arrangement of mechanical equipment and construction personnel.

Second, the construction preparation and site layout:

(1) technical preparation:

1, blue prints.the design.

2. Sign the construction contract and work agreement.

3. Analyze all kinds of materials according to the budget, determine their dosage, determine their entry date and quantity according to the requirements of construction progress, organize material procurement personnel to source all materials, arrange the procurement of materials needed for the project, and ensure that the materials needed for the project will enter the site as scheduled.

4. According to the exploration terrain and site conditions of the construction site, it is proposed to use earthwork excavation personnel.

5. Surveying and setting-out: Check and accept the red-line piles, measure the main axis of the newly-built fence with the checked known axes and coordinate points according to the general plan, bury the permanent axis control piles, and go through the visa formalities for building positioning and acceptance.

(2) Construction electricity consumption

The electricity consumption on the construction site should be arranged according to the requirements of temporary electricity consumption in the city. A general distribution box is set at the entrance of construction power supply, a distribution box is set at the mixing shed and the site respectively, and a distribution box is set at the south, north and west facades along the power lines erected around the proposed building.

All electrical circuits adopt three-phase five-wire system, and mechanical electricity and lighting electricity are set separately to meet the requirements of power supply operation regulations.

(3) Construction water

After on-the-spot investigation, Li Canal is adopted for centralized water supply.

P 100mm steel pipe is selected as the main water supply pipe at the site, and P50mm water supply pipe is used at the site to meet the water demand of the project construction.

P50mm water pipes are used in the construction site, and the mixing shed is equipped with faucets for construction water.

(four) the general layout of the building

The construction site shall be arranged according to the requirements of excellent engineering, and hardening treatment shall be considered according to the field investigation, excellent engineering requirements and convenient construction. See attached figure 1: general layout of construction for details of site layout.

Third, the allocation of labor and construction machinery

In the whole construction process, we will strive to make careful organization, overall arrangement and comprehensive coordination between various units and professional types of work. Managers should be responsible to their peers, focusing on site management, command and coordination, and inspection and implementation.

(a) the construction management organization

Carefully organize the project management team of this project, and appoint experienced comrades as project managers to organize the construction.

In the whole construction process, the project manager is responsible for all construction management work such as engineering technology, quality, time limit for a project, and safety production management. Ensure that the project is completed on time and with good quality at the site.

1, the construction organization and management network is as follows:

Construction organization and management network

2, the construction labor arrangement

See the list of professional positions (Table 2) for details.

The admission time and number of people can be temporarily adjusted according to the actual needs of the site.

(2) mechanical equipment list

See the list of main machinery and equipment (table 1) for details.

Fourth, the important parts of the construction method

(1) Earthwork and Foundation Works

1, measuring unreeling

(1) Layout of survey control network in construction site

Before the project starts, coordinate control points and leveling points provided by the construction unit and planning department shall be used to establish coordinate control network and elevation control network within the site, so as to facilitate the release of the axis and elevation of the building and check the measurement results.

(2) Layout of axis control network of building

① Determine two control axes, which are used for the longitudinal and transverse permanent measurement respectively.

(2) Before foundation construction, the above-mentioned control axes shall be set within the range of 10- 15m outside the main building, and two points shall be set on each side of each control axis, so as to facilitate upward putright and one-way check of the axis. Each point should be marked with a gantry pile (the extension point can be set on the fixed building far away from the periphery), which can lead to the wall of the adjacent fixed building. During foundation construction, the gantry pile should be used as the reference point.

(3) When the construction reaches 0.00 m, use theodolite to set the control axis on the gantry pile, putright it on the brick masonry, and set the basis points to putright the control axis of each layer.

(4) After the control axis layout is completed, use theodolite and steel tape to layout other axes and control axes of each layer.

(3) Layout and transmission of elevation

(1) Before the formal construction, within the range of 8- 15m outside the building, use the site elevation control network to set up 2-3 elevation rear viewpoints, and ensure intervisibility with the building. Elevation points can be led to the wall with stable settlement for future reference, but not to nearby buildings or structures.

(2) Use a level, a ruler and a steel tape to putright the reference elevation along the outer surface of the external wall from the ground, which can be carried out on both sides of the building respectively. The elevations of the two elevation points putright should be checked and corrected with each other to reduce the measurement error.

(5) Transmission of measurement information:

(1) After each axis or elevation is putright, the construction surveyors must submit the lofting position and elevation in writing to the relevant foreman and technical director for technical disclosure and handover, and sign for acceptance after being checked and confirmed by the technical director and the corresponding foreman.

(2) The foreman accepts the axis and elevation of each section of the construction surveyor as the rear viewpoint, and then measures the specific position and elevation of each component.

(6) After the axis layout of each floor is completed, the construction surveyor must check the verticality of each diagonal point of the building. If the deviation exceeds the standard, the foreman and technical director should find out the reason and take certain technical measures to eliminate the hidden danger of excessive measurement deviation.

2, earthwork excavation and backfill:

(1) mining

As this project adopts strip brick foundation, considering the foundation type, the whole excavation can be adopted, and the earthwork adopts mechanical excavation.

When excavating earthwork, you should read the geological exploration report of the project first. If the soil quality is poor, slope excavation can be used. If the soil quality is good and the excavation depth is shallow, slope-free excavation can be adopted, depending on the actual situation.

During the construction period, a sump should be set up at the site for drainage. With the excavation of the foundation pit, the depth of the sump will be deepened to ensure that the groundwater level is below the geosyncline, and to prevent the soil layer on the pit wall from being wetted by surface water and groundwater, which will reduce the cohesion and lead to the slope instability and collapse under the action of gravity.

Drains or water retaining dikes should be set on the outer side of the upper mouth of the foundation pit to prevent surface water from flowing into the foundation pit. The top of the slope should keep a certain distance from the drainage ditch, generally 0.5-1.0m. ..

When excavating earthwork, it is necessary to avoid piling up soil at the slope. The excavated earthwork shall be piled at the designated stacking point, and the distance between the pile and the top edge of the slope shall not be less than 1m, and not less than 2m in case of poor soil quality. The pile height shall not exceed1.50m.

Before earthwork excavation, the residual soil should be calculated according to the actual situation of foundation trench excavation, indoor and outdoor height difference and natural floor elevation, and then transported out during excavation to reduce unnecessary site occupation.

(2) Earthwork backfilling

Earthwork shall be backfilled and compacted in layers, and the thickness of each layer of backfill soil shall not be greater than 300mm. When the width of the foundation pit is narrow, manual compaction should be adopted. Before backfilling, the accumulated water and sundries in the foundation pit should be removed. If the groundwater level is high, drainage measures should also be considered.

Backfill soil should comply with the regulations. Cohesive soil, muddy soil with high water content, impurity soil containing turf, garbage soil left after the demolition of the original building, etc. Should not be used as backfill. Fill should not contain clods with a diameter greater than 50 mm, nor should there be more dry clods to avoid false tamping.

When excavating the foundation trench and transporting excess soil, the miscellaneous fill on the upper surface of the natural floor should be transported out as far as possible and backfilled with better soil.

3, basic engineering

(1) foundation cushion concrete

During the construction of foundation concrete, the concrete cushion and surface must be cleaned, and no water or soil can fall into the groove. When the side formwork is supported on the foundation pit wall, attention should be paid to the stability of reinforcement. The formwork support rod cannot be directly supported on the soil wall, and the support lower mouth must be supported on the dense soil layer with a cushion block to prevent the formwork from running off when pouring concrete. The formwork of foundation beam can be strengthened by diagonal bracing and opposite bracing, and the width of bayonet reinforcement or special angle steel at the upper mouth of beam body should be limited.

When pouring foundation concrete, no construction joints shall be left.

(2) Brick foundation

Before the construction of brick foundation, when backfilling the side of foundation beam, soil should be avoided from scattering on the foundation beam. If so, the foundation beam should be cleaned up, the center line and sideline of the brick foundation will pop up, a layer of cement mortar will be laid to level the local unevenness of the foundation beam upper wall, and then the brick wall will be built. It is also possible to fill the soil after the brick foundation is laid, so as to keep the original concrete surface clean during the brick foundation laying stage and further ensure the laying quality.

(2) the main structure engineering

1, wall engineering

Masonry materials for this project:

Brick for wall building:

(1) masonry materials:

Below 0.00 m, MU 10 standard brick and M7.5 cement mortar are used for masonry.

More than+/-0.00 m shall be built with MU 10 standard brick and M7.5 mixed mortar;

(2) Variety and label of masonry mortar

M7.5 cement mortar is used below 0.00 meters.

M7.5 mixed mortar shall be used above 0.00 meters. ..

The quality of masonry must meet the requirements of "three degrees inside" and "three degrees outside" put forward by the acceptance standard.

(1) Materials used in masonry engineering must be tested before use, and unqualified materials are strictly prohibited.

(2) Masonry mortar: the variety and label of mortar must meet the design requirements. Yellow sand shall not contain sundries. Tap water should be used, and the impurity content of yellow sand should be controlled within 3%. After lime putty comes into play, it should be prevented from drying and pollution. Dehydrated and hardened lime putty and unqualified lime putty are strictly prohibited.

Mortar mixing should be carried out in a certain order. Generally, it is divided into two feeding steps. First, a part of yellow sand, water and all plasticizing materials (lime paste or micro-particles) are added to open the plasticizing materials by stirring (until there are no bumps), and then the remaining yellow sand and all cement are put into it for stirring until the mortar color is consistent.

(3) Construction preparation: Before laying, bricks or blocks must be soaked in water, but they must not be too wet or uneven.

(4) Before laying, the mortar sundries on the surface of the base must be cleaned, watered and moistened, and placed at the same time; Before laying, the pipes and embedded parts at the mouth of the cave shall be reserved according to the design requirements of drawings.

(5) We should operate in strict accordance with the construction specifications of brick masonry, calculate the skin number and mortar joint thickness of this layer of brick according to the height of floor slab, window sill and window top, pop up the wall axis at the construction site, set up a number of skin rods, control the mortar joint thickness to control the height of masonry, and use seven-divided bricks or small-sized blocks to cooperate with the whole brick to build corners and wall ends to achieve the purpose of staggered joints.

(6) When masonry meets mortar joint, the surface of mortar joint must be cleaned, watered and wetted, and filled with mortar to keep mortar joint straight.

(7) When repairing the wall, check the corrosion of Rachel. If the corrosion is serious, tools such as wire brushes must be used to remove rust before the building is concealed.

(8) Do mortar test blocks according to the specification requirements, and conduct tests on schedule.

(9) Before plastering, the concealed acceptance record of masonry shall be made.

(3) Indoor and outdoor decoration works

After the interior and exterior wall painting subdivisional works enter the decoration stage, before construction, sample rooms or test blocks shall be made according to the requirements of the design and construction units, and large-scale construction shall be carried out after the acceptance of the owners, supervisors and design units. Each type of work is interspersed with construction, and the construction sequence adopts the method of first down and then up, and the internal and external operations are simultaneously crossed.

1, interior and exterior wall painting

(1) Before plastering, the wall should be watered, and the masonry base should be watered twice. The water seepage depth of brick surface is about 8- 10 mm, which meets the plastering requirements.

(2) Plastering mortar must have good workability and certain bonding strength.

The consistency of plastering mortar is generally controlled as follows:

The bottom plastering mortar is100-120mm.

Surface plastering mortar is100 mm.

(3) The raw materials and mortar used for plastering shall meet the quality requirements. Cement mortar and mixed mortar for plastering should be used within 3 hours and 4 hours after mixing, and should be used as soon as possible.

(4) When the error of local verticality and flatness is large, the thickened part of plastering layer should be leveled several times, and it is advisable to control the plastering thickness at 8- 10 mm each time.

(7) Scaffolding engineering and surrounding safety protection

Internal and external scaffolding adopts mobile temporary scaffolding.

Five, safety and civilized construction management measures

1, safety construction management system

(1) Formulate the project safety management system, and conduct self-safety assessment at the same time, and conduct the assessment through the relevant departments of our unit.

(2) Establish a project safety management network with the project manager as the main body, and designate a special person to be responsible for safety management.

2, safety construction management measures

(1) Strengthen safety education, enhance safety awareness and cooperate with safety management personnel at all levels. The safety objectives are decomposed layer by layer and implemented in the team, so that whoever constructs will be responsible, and the safety operation procedures and enterprise production management system promulgated by superiors will be strictly implemented.

(2) According to the relevant regulations of the city, the construction site is fully enclosed and managed by special personnel. Non-construction personnel are strictly prohibited from entering the construction site.

(3) Construction personnel and residents should set up a head protective shed at the construction access opening, and the protective shed should be safe and firm.

(4) All the machines on site shall be operated by one machine and one brake system.

(5) The operation of each type of work must be carried out in strict accordance with the safety operation procedures and safety technical disclosure of this project.

(6) Put an end to throwing things at will and don't change jobs.

(7) Set full-time security personnel for all-round supervision and management.

(8) Personnel entering the construction site must wear safety helmets, and aerial work personnel should wear safety belts.

(9) The responsibility for safety shall be implemented by people, and the listing system shall be implemented, and eye-catching safety publicity slogans shall be posted on site.

(10) The company is responsible for taking the lead and assigning special personnel to specify the rules for going out and carrying materials and tools. In the stage of decoration and installation, it is necessary to organize a finished product protection team and arrange full-time guards in different rooms. During the construction period, the foreman of the project department will organize night patrol, put an end to all destructive behaviors and undesirable phenomena, and often keep in touch with the local police station and neighborhood committees to ensure the normal construction of the project in a benign state of safety and civilization.

(1 1) Workers with special types of work should receive professional training, and be issued with operation certificates after passing the examination, and be required to hold relevant certificates.

(12) Conduct safety education for new workers and workers who have changed jobs, make them familiar with the operation procedures of this position, conduct security team activities every Monday, and make specific records. Conduct safety self-inspection after work to solve problems in time.

(13) It is forbidden to use open flames on the construction site. Flammable and explosive materials should be safely stacked and kept by special personnel.

(14) Establish the responsibility guarantee system for construction safety.

3, civilized construction management system

(1) Formulate the internal management system of the project, which will be assessed by the relevant departments of our unit and linked to the salary of the managers of the project department.

(2) Establish a project management network with the project manager as the main manager, and designate a special person to be responsible for the management.

4, civilized construction management measures

(1) Abide by the rules and regulations, and it is strictly forbidden to command, operate and carry out barbaric construction in violation of regulations. Safety helmets are uniformly distributed on the construction site, and the colors are matched according to regulations, which is convenient for management and related inspection.

(2) On-site standardization, strict on-site material management, classification according to regulations, and orderly stacking according to specifications. Materials should be unloaded, transported or hoisted at the site and piled up in time.

(3) Carry out the construction in strict accordance with the specifications and design requirements, ensure the construction quality and safety, and put an end to barbaric construction. The construction area should be kept clean every day.

(4) Strengthen the protection of finished products, semi-finished products, products and materials, and designate special personnel to keep them.

(5) The layout of water and electricity lines on the construction site shall be arranged according to the specifications and standards and the requirements of civilized construction sites, and it is not allowed to pull, drag, connect or destroy them at will.

(6) The gatehouse shall practise a 24-hour patrol system and be responsible for the safety of the construction site.

(7) The entry and exit of foreign personnel and materials must be verified by the doorman, and they are not allowed to enter the construction site without wearing a helmet.

(8) During the construction period, ensure the cleanliness of the surrounding roads, clean up the garbage in time, and clean up the vehicles with mud before going out.

(9) Arrange fire-fighting facilities according to regulations, and regularly check whether the fire-fighting facilities are invalid, control the use of fire on site, and emphasize the safety of electricity and machinery.

(10) Strengthen the contact with the local police station, 1 10 department, water and electricity department and dormitory management department, so as to get their strong support and cooperation, provide convenience for the construction, and complete the construction task of this project with high quality, high speed and civilization to the satisfaction of the construction unit.

(1 1) Carry out the construction of professional ethics, improve the quality of employees and establish a good corporate image.

(12) Integrated responsibility for site capacity management, personnel implementation and release.

(13) Strengthen the education of employees' legal concept, make our due contribution to maintaining a stable environment, and truly achieve high-speed and excellent engineering, civilized construction site, clean and tidy sanitation and comprehensive management standards.

Quality assurance system and technical measures of intransitive verbs

(A) the project quality objectives

Ensure that the quality of the project is excellent at one time and put into production up to standard.

(B) establish and improve the quality assurance system

Establish and improve the quality assurance system, rationally organize the quality management functions and activities of all departments and links of the enterprise, form an organic whole with clear tasks, responsibilities and authority, coordinate and promote each other, and ensure the project is completed according to the target.

The quality assurance system network is as follows:

Quality assurance system network

1, with the quality tenet of our company as the key link and the relevant national technical quality specifications and procedures as the guide, and under the premise of clarifying the quality responsibilities of managers at all levels in the project department, carry out quality management correctly and reasonably.

2. Set up a project quality management committee headed by the project manager and composed of personnel from various functional departments directly related to the project quality management of the project department to implement unified leadership over the project quality and make decisions on major technical measures to ensure the project quality.

3. The Project Department has full-time quality inspectors, and each professional team has 1-2 part-time quality inspectors to form the quality supervision organization of the Project Department. Every quality inspector will follow up the inspection on the spot, urge the relevant personnel to correct the problems or report the major problems to the technical director immediately, and give the quality inspector special "six rights"-supervision and inspection rights, quality veto rights, assessment and evaluation rights, commendation and reward rights, punishment rights and leapfrog reporting rights.

4, implement the "who cares about production, who cares about quality; Who is responsible for construction and quality; Who operates, who guarantees the quality "principle, implement the post responsibility system for engineering quality, and implement it layer by layer, sign the responsibility form for engineering quality objectives, and use economic means to assist the implementation of the post responsibility system for engineering quality.

5. Conduct regular internal quality inspection activities according to the Code for Construction Acceptance of Building and Installation Engineering, and take the inspection results as the basis for formulating corrective and preventive measures.

(3) Technical measures

1, conscientiously study and implement relevant national construction codes and standards, and actively promote and apply new technologies, new processes, new equipment and new materials in strict accordance with the requirements of construction drawings and construction organization design.

2, the project set up technical director, fully responsible for all the comprehensive technical management of this project, equipped with technicians, inspectors, foreman, etc. , set up an operator. Technicians, foremen, quality inspectors and operators are all led and supervised by the technical director.

3, formulate supporting technical management system and technical responsibility system for each post, and strictly abide by it.

4, before the formal construction, the relevant technical personnel to study the construction drawings, and do a good job of the blue prints.the design.

5, design drawings found in the process of construction