CN201202121Y - Foundation Pit Drainage Network - Google Patents

Abstract

A foundation pit drainage pipe network belongs to the technical field of foundation pit drainage. Drainage pipes are arranged on the ground, and the drainage pipes are connected with a tee. After the tee connection, the end of the entire drainage pipe is connected to a 90° elbow, and the end is connected to a 45° elbow. The utility model adopts the U-PVC pipe to replace the corrugated pipe used in the traditional drainage system, so that the whole drainage system has higher strength, and the U-PVC pipe is not directly connected with the sedimentation tank, which avoids the sedimentation tank and the drainage pipe in the traditional drainage system. For the problem of water seepage at the interface, the utility model has the advantages of simple structure, convenient construction and easy operation, and the drainage pipe is arranged on the ground, which is convenient for maintenance and can be reused many times, which greatly saves resources.

Description

Foundation Pit Drainage Network

technical field

The utility model belongs to the technical field of foundation pit drainage, in particular to a foundation pit drainage pipe network in which U-PVC pipes are arranged on the ground for drainage.

Background technique

The key to the smooth progress of underground engineering construction is the precipitation effect. A good precipitation effect creates good conditions for the smooth development of engineering construction. A good precipitation effect must be guaranteed by a good drainage system. If the drainage system is not smooth or seeps, the precipitation effect will be greatly reduced.

Most of the following two drainage systems are used in the current construction: (1) bellows are buried underground around the foundation pit. This method is similar to the general underground ditch drainage, and it is not easy to detect the leaking part. There are two main reasons for the leakage: ①Water seepage at the interface between the bellows and the bellows; For the water seepage at the interface between the bellows and the bellows, even if rubber strips or hemp silk caulks are used to seal the leakage, the effect is not ideal; for the water leakage of the bellows, the broken bellows can only be replaced, causing the entire precipitation belt to stop , time is limited, and rework is troublesome. Another unfavorable factor is that the deep well precipitation will bring a large amount of sediment through the hose, which cannot be cleaned when it settles at the bottom of the pipe, and the cross-sectional area through which the water flows will be reduced. The sediment will also be directly brought to the outdoor rainwater pipe. (2) Arrange bellows on the ground around the foundation pit. Set up a sedimentation tank around the foundation pit at an interval of 12m (the length of the bellows is 6m) (the plane size of the sedimentation tank is 1m×1m, the slope gradually decreases to the outdoor rainwater pipeline at a gradient of 2%, and the height is 1m). This approach is better than burying it in the ground, but it also has shortcomings. ①The four walls of the sedimentation tank are prone to water leakage, and the bottom of the pool needs to be laid with reinforced mesh to prevent the bottom plate from cracking and seepage; ②The water seepage at the interface between the sedimentation tank and the bellows is difficult to deal with; Cause the bellows to rupture and affect the normal precipitation work. ④ There must be multiple sedimentation tanks for the deep well rainfall leather pipe to be placed on the drainage ditch, which increases the possibility of water seepage in the drainage system.

Utility model content

Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a technical scheme of the foundation pit drainage pipe network, which is easy to maintain and can be reused many times.

The foundation pit drainage pipe network is characterized in that drainage pipes are arranged on the ground, and the drainage pipes are connected by a tee. After the tee connection, the end of the whole drainage pipe is connected to a 90° elbow, and the end is connected to a 45° elbow. ° Elbow.

The foundation pit drainage pipe network is characterized in that the inclination between the entire drainage pipe and the ground is 2%.

The foundation pit drainage pipe network is characterized in that the bottom of the entire drainage pipe is fixedly provided with brick piers.

The utility model adopts the U-PVC pipe to replace the corrugated pipe used in the traditional drainage system, so that the whole drainage system has higher strength, and the U-PVC pipe is not directly connected with the sedimentation tank, which avoids the sedimentation tank and the drainage pipe in the traditional drainage system For the problem of water seepage at the interface, the utility model has the advantages of simple structure, convenient construction and easy operation, and the drainage pipes are arranged on the ground, which is convenient for maintenance and can be reused many times, which greatly saves resources.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Drainage pipes 3 are arranged on the ground. U-PVC pipes with a diameter of 300 mm are used for the drainage pipes 3. Tee links 2 are used to connect the drain pipes 3, and U-PVC tees are used for the tee links 2. U-PVC pipe connections use special glue for PVC pipes. One end of the tee 2 is upward, and is used for placing the deep well dewatering hose, and the deep well dewatering hose discharges the water pumped up from the foundation pit into the drain pipe 3 . The end of the entire drainage pipe connected by the tee 2 is connected to a 90° elbow 4 to prevent water from overflowing, and the end is connected to a 45° elbow 1. The inclination between the entire drainage pipe and the ground is 2%, so that the drainage pipe The water in the tank flows through the 45° elbow 1 to the pre-set sedimentation tank. The sedimentation tank and the outdoor rainwater pipeline are separated by a brick wall to prevent the sediment from directly flowing into the outdoor municipal pipeline. The pipe bottom of the whole drainpipe is fixedly provided with bricklaying pier 5, in order to guarantee its stability.

In the specific construction process, the drainage outlets of the surrounding municipal pipe network should be used as much as possible, so that there are more outlets in the deep well precipitation drainage system, so as to ensure normal drainage without delaying construction. U-PVC pipes are used for the drainage pipes. Although the U-PVC pipes have a certain strength, attention should be paid to the pipes due to falling objects, careless tower crane operation or mechanical vehicles colliding with the pipes, so as to prevent artificial stacking on the pipes. The walls and bottom of the sedimentation tank should be waterproofed. If the treatment is not done properly, it will easily lead to collapse accidents due to long-term waterlogging and soft soil. Shallow open ditch drainage should also be set around the foundation pit to prevent surface water from flowing into the foundation pit during long-term rainfall or heavy rain.

Claims (3)

1. The foundation pit drainage pipe network is characterized in that drainage pipes (3) are arranged on the ground, and the drainage pipes (3) are connected by tees (2), and the entire drainage pipe connected by the tees (2) Connect the 90° elbow (4) at the end and the 45° elbow (1) at the end. 2. The foundation pit drainage pipe network according to claim 1, characterized in that the inclination between the entire drainage pipe and the ground is 2%. 3. The foundation pit drainage pipe network according to claim 1, characterized in that the bottom of the entire drainage pipe is fixedly provided with brickwork piers (5).