Rain pollution technology for road construction?

The following is the related content of rain and pollution technology in road construction brought by Zhong Da Consulting for your reference.

Municipal road construction is an important aspect of urban infrastructure construction, which has great influence on local construction and the life of urban residents. The quality of its construction is related to many people's livelihood issues, and it also reflects the working ability of the government. However, there are still many problems in municipal road construction management, such as the delay in construction period, the impact on residents' normal life and travel, the low construction quality, the short service life of municipal roads, the great technical difficulty in construction, and the loopholes in enterprise management. Therefore, enterprises must formulate the construction period scientifically and reasonably and strictly implement it, strengthen the supervision of construction quality and the management of technical equipment, thus greatly improving the construction quality.

First, the preliminary preparation work analysis

(A) the choice of building materials

The construction of road rainwater and sewage is complicated and difficult. Therefore, in this case, the construction personnel must strengthen the selection of construction materials before carrying out specific construction operations, so as to ensure that the quality of construction materials can not only meet the requirements of the country, but also play the greatest role in the whole road project.

(1) Conduct the most comprehensive survey of road rainwater and sewage on the construction site to ensure the safety of the construction site;

(2) Do detailed soil structure testing, such as: testing the maximum bearing capacity of the soil at the construction site;

(3) According to the final geotechnical test results, make the material purchasing list that conforms to the rain and pollution construction project of this road.

(2) Making pipeline design drawings.

The specifications of various pipelines used in road rain and sewage projects are different. Therefore, when making pipeline design drawings, designers should first measure the slope of pipeline construction, and then design pipeline design drawings reasonably according to the actual situation of slope. Secondly, designers should also ensure that the velocity of water in the pipeline is between the self-cleaning velocity and the scouring velocity when making pipeline design drawings. If this requirement cannot be met, then the designer must tell the constructor and let the constructor handle it.

(3) preset protective measures

Before rain and sewage engineering operations, in order to ensure the safety of the construction site, the following points should be strictly observed:

(1) Set corresponding warning signs for project construction;

(2) Set up isolation belts around the whole construction site, and post slogans such as "No entry for non-operating personnel";

(3) Construction personnel must wear safety helmets when entering the construction site.

(4) When preparing to follow up the road excavation work in the early stage of the road excavation work, the construction personnel shall proofread the road excavation position in strict accordance with the contents of the design drawings. If the construction personnel find something inconsistent with the design drawings in the proofreading work, they should ask the designers to modify the design drawings appropriately to ensure the accuracy of the construction work.

Second, the road rain sewage design points

(1) Location of rainwater pipes

When the width of the motorway is less than 24.0m, it is suggested to set the rainwater pipe in the area below the motorway when designing the position, and in principle, the position of the wheel track line should be avoided. According to the requirements of the current design code, the length of the connecting pipe of the rain outlet should be strictly controlled within 25.0m, and the buried depth should be within1.0 m. When the width of the motorway is higher than 24.0m, it is suggested that the following conditions should be considered when designing the position of the rainwater pipe: in the first case, the sidewalk and the non-motorway are integrated, and there is a green belt between the motorway and the non-motorway. To meet the above conditions, it is considered that the rainwater pipe should be located in the inner area of the carriageway and avoid the wheels in principle. In the second case, sidewalks and non-motor vehicle lanes are integrated, and there is no green belt between motor vehicle lanes and non-motor vehicle lanes. When the road width is less than 24.0m, the rainwater pipe should be set at the inner side of the red line 1.0m, and when the road width is greater than 24.0m, the rainwater pipe should be set at the position 2.0m near the outer edge of the motor vehicle lane.

(2) the location of the sewage pipe

In principle, it is recommended to arrange the sewage pipeline at the inner edge of the red line on the other side of the rainwater pipeline at1m. At the same time, the diameter of sewage pipes is generally not large (except for the head of sewage treatment plant, most of the other diameters are within d800). Therefore, the maximum outer diameter of the corresponding inspection well is less than 2m. Considering this feature, it is suggested that sewage pipes should be arranged outside motor vehicle lanes, so that on the one hand, the underground space occupied by pipeline layout can be reduced, on the other hand, it will not have a great impact on the burial of other pipelines. According to the requirements of Code for Comprehensive Planning of Engineering Pipelines, when the road width is less than 50m, rain and sewage pipelines should be arranged unilaterally.

Third, the road rain sewage construction technology

(1) pit and groove excavation

The excavation of pits and grooves is small in engineering quantity and low in difficulty, which makes many constructors ignore its importance, resulting in many problems in the construction process, such as the pit and groove size does not meet the construction requirements, the pit and groove position is quite different from the design drawings, and the pit and groove depth does not meet the construction requirements. Once these problems appear, it will greatly reduce the quality of the whole road engineering construction. Therefore, in the face of the problems in pit and trough construction, the construction personnel should pay attention to them and take a series of reasonable measures to effectively deal with these problems.

(2) Pipeline leakage prevention

Pipeline leakage often occurs in the process of road rain and sewage construction. There are two main reasons for this phenomenon: one is that the pipeline itself does not have high anti-seepage efficiency; The other is that there is a crack at the joint of the pipeline, which makes the rainwater and sewage in the pipeline seep through the crack. Therefore, in order to effectively avoid this phenomenon, construction personnel must do the following when carrying out specific construction operations:

(1) When purchasing pipelines, the materials of pipelines must be inspected in strict accordance with the requirements of construction to ensure that pipelines can be applied to current road projects;

(2) Before the pipeline is put into storage, quality inspection must be carried out, such as testing materials, specifications and the maximum load it can bear, and a test report should be made according to the test results.

(3) Backfill soil subsidence

There are two factors leading to the subsidence of backfill soil:

(1) The quality of the filler can't meet the construction standard;

(2) The water content of backfill soil is too high. Therefore, when backfilling, we must strictly follow the relevant national standards to select fillers that meet the construction requirements. In addition, according to the soil quality of pipeline construction site, the water content of backfill soil should be investigated to ensure that the water content of backfill soil can meet the requirements of current soil quality. This can greatly reduce the probability of backfill soil subsidence.

(4) Backfilling operation

After the pit is dug, the inner wall of the pit should be backfilled, and the filler used for backfilling can be gravel or plain soil. Secondly, in the process of backfilling, we should also pay strict attention to the following points:

(1) Clean up the sundries in the pit. If a small amount of water is found, it should be handled in time;

(2) When backfilling, in case of rainy days, protective measures should be taken to protect the pit and groove reasonably to prevent the influence of rainwater on backfilling;

(3) Make connections between wellheads, so that the discharge mode of rainwater and sewage can meet the process of "direct flow from rainwater well to mud open caisson".

Conclusion To sum up, the design of road rainwater and sewage is the focus of the whole project construction, and its quality will directly affect the construction quality and even the overall construction level of the whole project. Therefore, in the face of the problems existing in the rain sewage construction, the construction personnel must use the rain sewage design technology to effectively deal with them. Only in this way can the quality of road rain and sewage construction be greatly improved. At the same time, it can also make the design and construction technology of rainwater and sewage become a powerful driving force to promote the further development of road engineering in China.

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