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Processing method for deep building pit piping

A treatment method and technology for deep foundation pits, applied in the direction of pipe elements, pipes/pipe joints/pipe fittings, mechanical equipment, etc., can solve the problems of cofferdam collapse, troublesome handling, poor effect of large piping, etc., to achieve smooth drainage channels, Reliable and simple effect

Inactive Publication Date: 2008-08-20
CHINA FIRST METALLURGICAL GROUP
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Problems solved by technology

However, in deep foundation pits, the water head difference between inside and outside the pit is relatively large, which will lead to a high height of the sand bag or soil surrounding the weir, and the cofferdam itself may also have the risk of collapse. Therefore, this method is effective for small piping, but for Large piping is not only ineffective, but also brings a lot of trouble to subsequent processing

Method used

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  • Processing method for deep building pit piping

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Effect test

Embodiment 1

[0019] Embodiment 1, referring to Fig. 1, when the foundation pit is excavated to a certain level or at the bottom of the pit 1, a piping point 2 appears, first at the piping point 2, the piping point 2 is buckled or surrounded by the steel pipe 3 first. , and enter a certain degree of depth (about 30cm) in the soil layer, and drop part of the filter material 7 into the inside of the steel pipe 3, so that there is a channel for leakage in the pipe, but it is all organized leakage, and the loss of silt is less. When the water pressure difference forming the piping is large, another section of steel pipe 4 can be connected to the steel pipe 3, so that the water pressure difference forming the piping can be reduced as soon as possible until reaching equilibrium. When the water head balance water level 9 is lower than the steel pipe 3 or the At 4 o'clock, holes 5 can be opened on the side of the steel pipe, so that the water in the steel pipe can be discharged in time. In order to...

Embodiment 2

[0021] Embodiment 2, referring to FIG. 2 , this embodiment is based on Embodiment 1, and the steel pipe 3 is replaced with a prefabricated concrete pipe or a plastic pipe. Outside the prefabricated concrete pipe 3, one, two or more than two sandbags or soil surrounding weirs 6 can be arranged.

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Abstract

The invention relates to a disposal method of a deep foundation pit piping in the civil construction and municipal field. The steps of the method are that a piping point where the piping appears is buckled by a pipe at first, meanwhile or after that, cofferdams are arranged at the periphery of the pipe by sand packets or soil packets, and the pipe and the cofferdams are internally filled with filter materials; openings are then opened on the side surface of the pipe to discharge the piping water, and slurry is finally poured at the periphery of the piping mouth. The construction method is simple, has reliable effect and can effectively block the piping in deep foundation pits.

Description

technical field [0001] The invention relates to the fields of civil construction and municipal administration, in particular to a treatment method for deep foundation pit piping. Background technique [0002] In the field of construction, due to factors such as the large difference in the groundwater head inside and outside the pit after the excavation of the deep foundation pit, the complexity of the soil layer, the reasons for the construction of engineering piles, and the unsealed exploration holes, it is easy to cause the excavation process of the deep foundation pit or After the excavation to the bottom, piping occurs before the concrete pouring of the basement floor, resulting in the inability to continue the construction of the deep foundation pit or basement, and bringing major safety hazards or even major safety accidents to the surrounding environment and deep foundation pits. [0003] There are several existing methods for dealing with piping as follows: the first...

Claims

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Application Information

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IPC IPC(8): F16L55/175
Inventor 王平
Owner CHINA FIRST METALLURGICAL GROUP
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