Construction organization design of outpatient building in downtown hospital.

What is the specific content of the construction organization design of the outpatient building of the downtown hospital? The following Zhong Da Consultation will answer your questions.

Construction scheme

(A) the construction survey scheme

1. Building axis and elevation control:

After the city survey brigade locates the building and determines the relevant leveling points, our construction unit will establish the construction axis control network and leveling points in time based on this. The main building has three horizontal control axes (1.9. 14 axis) and two vertical control axes (A and D axis). The annex has two horizontal control axes, namely 1. 1 1 axis, and two vertical control axes, namely, H axis and L axis. In this way, the axis control network is established to ensure that the axis deviation does not exceed the allowable range of the specification. After the leveling point is determined, the elevation should be measured in time within the construction scope, and the elevation point should be marked on the buildings or structures that are stable, easy to measure and have no settlement.

2. Foundation and main project construction survey

The basic engineering construction mainly uses theodolite and level to control the axis and elevation of the building. In the construction of the main project, in order to improve the measurement accuracy and reduce the measurement deviation, the laser plumb instrument is used to carry out construction measurement with theodolite and level. During the main body construction, the control axis is transmitted to the construction layer by laser plumb instrument from bottom to top, and then measured by theodolite after inspection and confirmation, so as to ensure the correct axis position.

3. The elevation transfer in the main project construction:

During the construction process, the elevation will be transferred from the lower floor to the upper floor, so that the elevation of the storey, floors, doors and windows, interior decoration and other projects can meet the design requirements. Elevation transfer adopts steel rule direct measurement method, and at least three elevation datum points of 0.000 are set on the first floor, and the elevation is transferred upward based on these three datum points during construction.

4. Building settlement observation:

According to the layout requirements of settlement observation points in the construction drawing, correctly bury settlement observation points. When measuring the elevation of the settlement observation point for the first time, the accuracy of the initial measurement must be ensured, and its elevation should be determined after two observations in the same period. During the construction of the main body of the project, settlement observation shall be conducted once every layer is completed, and settlement observation shall be conducted once a month after the completion of the main body of the project until the project is completed. In the process of settlement observation, if you find abnormal settlement, you should contact the design institute in time. After the building is completed, the settlement observation should still be carried out once a month in the first year, once every two months in the second year, once every six months in the third year and once every year in the fourth year until the settlement is stable. Settlement observation is a long-term systematic observation work. In order to ensure the correctness of the observation results, four tests should be carried out as far as possible:

(1) Fixed personnel observe and sort out the results.

(2) fixed use level and spirit level.

(3) Use fixed leveling points.

(4) Observe according to the specified date, method and route.

(2) Foundation earthwork excavation and deep foundation pit support scheme

1. Foundation earthwork

(1) The earthwork excavation of this project is divided into three sections, and the earthwork excavation volume is about 26000m3 (including sloping and ramp). See Shi Jie 3 for the plane position, and see Shi Jian for the absolute elevation corresponding to each 0.000 section. For the foundation excavation, 2 sets 1m3 hydraulic excavators will be used for the construction machinery, and 8 sets 10t dump trucks will spoil the soil. The foundation excavation sequence is _ _ _ main building construction first, then enter the main entrance canopy of _ _ _ section and the foundation excavation of auxiliary buildings of _ _ _ section after the main structure of _ _ _ section is completed, and then enter the foundation pit construction of underground pool of _ _ _ section after the main structure of _ _ _ section is completed.

(2) earthwork layered construction

Due to the different excavation depths of each component of this project, (_)-7.25m, 6.95m, 6.35m and-7.35m locally) all exceed the maximum excavation depth of ordinary excavators. At the same time, considering the elevation of foundation pit, slope steps and the production efficiency of excavator, this project is planned to be excavated in two layers. The first layer _ profile is-3.25m, _ profile is-2.95m, _ profile is-3.35m; The second layer is excavated to the pit bottom elevation of each section.

(3) The slope shall be determined according to the excavation depth of each section of the project, and the slope gradient shall be determined according to the geological exploration report and the surrounding conditions of the construction site, with reference to the specification requirements and relevant regulations. Because the geological exploration of this project is unknown, according to the good geological conditions in this area (except for the local soil nailing wall in the southeast corner of section _), the slope of the first layer is 1: 0.5, and the slope of the second layer is 1: 0.75. Add a platform with the width of 1m between floors. See the schematic diagram of foundation pit excavation section on page 1 1 for details.

(4) Opening of ramps

Due to the design requirements and site restrictions, this project is divided into three sections and constructed in different periods, so it is necessary to set up three first-floor ramps with a slope of 1: 6 and a width of 6m. After foundation pit excavation, in addition to the requirements of civil construction, the ramp should be backfilled to ensure construction safety.

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