Storm sewer does not do closed water test 10

Do. In accordance with the requirements of municipal construction regulations, the sewage pipeline must be closed water test before backfilling.

Before the test, the construction site.

The following conditions should be met:

1. Pipelines and inspection wells.

The appearance quality and measurement inspection have been qualified.

2. The pipe plugging (brick masonry) at both ends of the pipeline should be tightly blocked and firm, and the downstream pipe plugging should be set up with a discharge pipe and a door, and the pipe plug can withstand pressure after accounting.

3. The water source on site meets the needs of closed water and does not affect other water use.

4. Choose the location of the discharge water and not affect the surrounding environment.

In addition, there are some pipes that need to be closed water test, such as rainwater and sewage confluence pipes, inverted siphons, and other pipes whose design requires closed water.

Rainwater pipe closed water test: rainwater pipe refers to the combined pipe of sewage and rainwater under the city, when the rainwater pipe is blocked, it is easy to lead to urban waterlogging. Therefore, it is necessary to carry out regular stormwater pipe inspection work to ensure the normal operation of the pipes.

So, what are the requirements in conducting a storm sewer inspection.

1. Closed water test.

The method of non-pressure gravity direct transportation is adopted, so it can be tested with good sealing by closed water method according to the domestic water pipeline construction and acceptance requirements, and the specific operation can refer to the provisions of the "Water Supply and Drainage Pipeline Engineering Construction and Acceptance Code".

Second, the length of the pipe section tested by the experiment.

According to domestic regulations, the test section should be separated according to the well distance, the length can not be greater than one kilometer, and the test should be carried out with the well test, so we should pay special attention to the length of the experimental inspection in the process of testing, basically after two or three short pipes are laid, the test can be carried out, so that the process of test inspection will be more convenient.

3. Test and inspection time.

Since the situation in each region is different, the specific situation of each place needs to be analyzed on a case-by-case basis. Therefore, it is necessary to choose the appropriate experimental examination time according to local conditions. Especially in southern areas such as Guangdong, the groundwater level is higher than in other places, so during the rainy season, if there is heavy rain or heavy rain, there is a high risk of drifting.

At this time, it is necessary to test it, and fill the water pressure in the pipeline, it is necessary to remember that the reserved hole must be blocked in advance, if the pipe itself has been strictly inspected, that is to say, the interface has been set aside before the closed water test, then only the backfill work can be carried out according to the requirements of the backfill.

Fourth, the test head.

In fact, there are very detailed instructions in the domestic regulations for test heads, but in order to better inspect the tightness of the well, water is usually poured into the wellhead of the inspection well.

In recent years, with the rapid development of the economy, especially the rapid development of industry, people's living standards are constantly improving, but physical and mental health has also suffered more and more damage due to pollution, car exhaust, acid rain, noise, indoor decoration gas pollution, sewage discharged from chemical plants on the ground, domestic sewage, all of which are destroying the original harmonious environment around us, threatening people's physical and mental health. There is also a growing awareness of the seriousness of pollution.

Drainage pipeline engineering is an important part of municipal construction, more closely related to people's lives, related to urban waterlogging and groundwater and soil pollution of ecological problems, as well as road structures also produce considerable harm, leakage of water around the soil particles impact on the pipe, the original hard soil in the long-term immersion and impact, part of the soil is carried away by the water flow, the sand is particularly obvious, the long-term effect of polluted water and soil will also greatly weaken the soil load strength, And the vehicle load on the road is not reduced because of this, under the long-term action, the road will appear local collapse phenomenon, which is also a major reason for the sinking around the drainage pipe and the well after the urban road is put into use for a period of time, so the tightness of the pipeline is of great significance to the water body and the road structure around the pipeline.

Carry out the stormwater pipe closed water test unit:

Zhongke Testing. The pipeline closed water test is also according to the national standard of the People's Republic of China "Code for Construction Quality Acceptance of Building Water Supply Drainage and Heating Engineering", and the following tests should be done after the drainage and sewage pipelines are completed: all kinds of pressure-bearing pipeline systems and equipment should be tested for hydrostatic pressure, and non-pressured pipeline systems and equipment should be tested for irrigation.

Therefore, it is necessary to carry out the closed water test of rainwater pipes!

The sewage pipeline must be tested for closed water to detect whether there is water seepage and leakage in the pipeline. But some storm sewers don't have to be done, why is that?

The sewage pipeline is a long-term use of the pipeline, it should be said that it is in use every hour of every day, and there will be some corrosive items in the sewage, now our country is not considered to be protected, the sewage is polluting to the environment, and the rainwater is not, there is leakage is also to replenish the soil water, the sewage pipeline is not allowed to leak. The method of taking different approaches depending on the fluid material in the pipe, but if the geological structure is not good enough, the storm water pipe is also required to carry out an irrigation test. According to the provisions of the "Water Supply and Drainage Pipeline Engineering Construction and Acceptance Specification", the rainwater pipeline in the area of sewage, rainwater and sewage confluence and collapsible soil and expansive soil should be tested by closed water method before backfilling.

Therefore, at present, whether it is a sewage pipeline or a rainwater pipe, a certain closed water test must be carried out to detect the tightness of the seven.

The pipeline closed water test is a long-term observation test, which requires the use of closed water air bags as pipe plugging. There is a pipe plug under the water discharge pipe and a door, and the pipe plug can withstand the pressure after accounting. After the closed water conditions are met, the closed water test of the pipeline can be carried out.

The test is carried out from the upstream to the downstream section, and after the upstream experiment is completed, it can be filled with water downstream, and the reverse section test can be carried out to save water. Quoted from:

It's going to be done, it's in the norms.

The national standard GB50268-2008 promulgated by the Ministry of Housing and Urban-Rural Development clearly stipulates that sewage pipelines, rain and sewage confluence pipelines, inverted siphons and other drainage pipes and municipal pipelines designed to require closed water tests must be closed water test.

If it is a combined rain and sewage pipe, it is necessary to do a closed water test, and there is no provision for rainwater pipes to be done.

The specific operation method of the closed water test:

The closed water test shall comply with the following procedures:

1. The soaking time of the test pipe section should not be less than 24h after it is filled with water;

2. The test head shall be determined in accordance with the provisions of Article 1 of this specification;

3. When the test head reaches the specified head, the timing shall be started, and the seepage water of the pipeline shall be observed, and the water shall be continuously replenished to the test pipe section until the end of the observation, and the test head shall be kept constant. The observation time of seepage water shall not be less than 30min;

4. The measured seepage water volume should be calculated as follows:

The closed water test should be recorded, and the record** should be in accordance with the provisions of the following table.

According to the "Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering" GB

Rainwater pipes generally do not do closed water test, sewage pipes do not do closed water test;

However, the rainwater and sewage confluence pipes and the stormwater pipes in the areas of collapsible soil and expansive soil need to be closed water test. Complete.

The description of each stage of the test is as follows: 1) Water injection immersion: The water level of the closed water test should be 2 meters above the top of the upstream pipe of the test section, and the water should be irrigated to the height close to the upper wellhead.

During the water injection process, the pipe plugging, pipeline, and well body should be checked for no water leakage and serious water seepage, and the closed water test should be carried out in the bubble pipe and well for 1 2 days;

2) Closed water test: the water is poured to the specified water level, the record is started, the measurement time of the seepage amount is not less than 30 minutes, and the seepage amount is calculated according to the decline value of the inner water surface, and the seepage water does not exceed the specified allowable seepage water volume is qualified.

3) Calculation of test seepage water: when the seepage water test time is 30 minutes, the water seepage per km pipeline per day and night is q = (48q) * (1000 L), "Municipal Drainage Pipe Engineering Quality Inspection Standard".

CJJ adopts the full pipe closed water test method.

A minimum of 24 hours is required.

The closed water test, also known as the water storage test, should be filled with water, and the water should have a sufficient volume. The water storage depth of the water storage test should not be less than 20mm, the water storage height is generally 30-40mm, and the water storage time shall not be less than 48 hours.

This test is generally done on the roof, bathroom or room with waterproof requirements. In the early stage of the water storage test, you should go downstairs to check once every 1 hour, and in the later stage, you should go downstairs to check every 2-3 hours. If water leakage is found, the water storage test should be stopped immediately, the waterproof layer should be re-improved, and the water storage test should be carried out after the treatment is qualified.

Precautions for closed water test.

The closed water test should be carried out after a period of waterproofing, and it is necessary to wait for all the waterproof materials to dry.

The closed water test requires the owner, the property department and the downstairs neighbors to participate in the inspection of whether there is water leakage, and if there is no water leakage, a contract is signed together to indicate that the acceptance is qualified.

When doing the closed water test of the bathroom and kitchen, the door should also be blocked, and a dam should be piled up with putty powder or cement to make the water surface height reach the corresponding height, and the water will not run from the door.

How to close the pipe when the drainage is closed for the water test?

Method: Plug the pipeline with plastic bags of water. Plugging pipes with plastic bags of water is a common method used by decoration companies. Method: Use of air bags. An air sac is a spherical object that can be inflated after being inflated.

Hello dear! Happy to reply or mock your questions! Do stormwater pipes do a closed water test?

Generally, the closed water test is not done for the erection of rainwater pipes, but the rainwater and sewage confluence pipes and the rainwater pipes in the areas of collapsible soil and expansive soil need to be closed water test. Rainwater pipes generally do not do closed water test, but rainwater and sewage confluence pipes and large rainwater pipes in collapsible soil and expansive soil areas need to do closed water test. In accordance with the requirements of municipal construction regulations, the sewage pipeline must be closed water test before backfilling, and the appearance quality of the pipeline and inspection wells and the "measurement" inspection have been qualified, which does not affect other water use, and the two ends of the pipeline should be blocked tightly and firmly.

Sewage pipes, rainwater and sewage confluence pipes, inverted siphons, and other pipes whose design requires closed water must be tested for closed water. The general way of practice is to test the mix ratio of raw materials such as cement, gravel, sand, and steel bars, as well as concrete testing and pipe testing. The closed water test is to carry out the closed water test after the completion of the pipeline, but the general rainwater pipe does not carry out the closed water test, and the sewage pipe is required to close the water test, and the rainwater pipe does not require the closed water test because it has no pollution hazard to the soil layer.

Need. Municipal pipeline engineering includes open row well precipitation, tube well point precipitation, light well point precipitation, large well precipitation, infiltration well precipitation, curtain precipitation, trench excavation, trench backfill, plate support support, hanging net spray anchor support, cast-in-place reinforced concrete ditch, brick ditch masonry, pipe jacking construction, water supply steel pipe installation, water supply prestressed concrete pipe installation, water supply chemical building materials pipe installation.

"Four-in-one" construction of drainage pipelines, drainage PVC-U pipelines, closed water test of drainage pipelines, closed air test of drainage pipelines, total pressure test of water supply pipelines, flushing and disinfection of water supply pipelines.

When the design head upstream of the test section does not exceed the inner wall of the pipe top, the test head should be calculated by adding 2 meters to the inner wall of the upstream pipe top of the test section. When the upstream design head of the test section exceeds the inner wall of the pipe top, the test head should be calculated by adding 2 meters to the upstream design head of the test section, and the test head is calculated to be less than 10 meters, but has exceeded the upstream inspection well wellhead, and the test head should be subject to the height of the upstream inspection well wellhead.

From the time when the test head reaches the specified water head, the seepage water of the pipeline should be observed until the end of the observation, and the water should be continuously replenished to the test pipe section to keep the test head constant. The observation time of the seepage water shall not be less than 30 minutes, and the seepage water shall not exceed the allowable value.