System and method for sand-gravel strata foundation pit precipitation and excavation construction

A technology for foundation pits and strata, applied in excavation, infrastructure engineering, construction, etc., can solve the problems of large impact on the surrounding environment and difficult construction.

Pending Publication Date: 2020-10-27
CITIC GUOAN CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the existing construction, for deep foundation pits (excavation depth exceeding 5 meters (including 5 meters), or depth not exceeding 5 meters, but the geological conditions, surrounding environment and underground pipelines are particularly complex foundation pit engineering ) During the construction process, there are a series of problems such as difficult construction and great impact on the surrounding environment

Method used

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  • System and method for sand-gravel strata foundation pit precipitation and excavation construction
  • System and method for sand-gravel strata foundation pit precipitation and excavation construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 and figure 2 As shown, the system for foundation pit dewatering and excavation construction in sand egg formation includes a foundation pit support assembly, and the foundation pit support assembly includes a shroud 1, and the shroud 1 is a hollow plate-like structure;

[0046] The coaming plate 1 includes an outer plate for connecting with the foundation pit and an inner plate close to the center of the foundation pit, and the outer plate is provided with a plurality of communication holes 15 passing through the inner and outer sides of the outer plate;

[0047] The inner side plate is provided with a drain port 13 that runs through the inner and outer sides of the inner plate, and the fluid conduction capacity of the drain port 13 is adjustable;

[0048] It also includes a water tank 12 fixed on the inner board, and the outlet end of the drain port 13 is located in the water tank 12 .

[0049] This scheme aims at the problems that exist in the cons...

Embodiment 2

[0054] Such as figure 1 and figure 2 As shown, this embodiment is further limited on the basis of Embodiment 1: as a specific solution for the adjustable fluid conduction capacity of the drain port 13, it is set as follows: the number of the drain port 13 is multiple, and some Or the blocking state of all drain ports 13 is adjustable. In this solution, a plurality of drain outlets 13 are used to form the coaming 1 to adjust the outlet water flow, and the specific adjustment method adopts the method of blocking part of the drain outlets 13 . During specific use, if the drainage of the foundation pit does not meet the safety requirements, the state where the above drainage outlets 13 are all blocked can be adopted.

[0055] When this scheme is actually implemented, in order to realize that the drainage flow rate of the coaming 1 through the drainage outlet 13 is multi-gradient adjustable, it is preferable to set the number of drainage outlets 13 as much as possible. Water ca...

Embodiment 3

[0070] This embodiment discloses a method for dewatering and excavating a foundation pit in a sand egg formation. The method is based on the system described in any one of the above embodiments. The method is implemented through the following steps:

[0071] S1, on the wall surface of the excavated foundation pit, a steel mesh 11 is set as the internal steel structure skeleton of the concrete wall;

[0072] S2. Arrange a plurality of grouting pipes 10 on the outer wall of the steel mesh 11, the grouting pipes 10 are arranged at intervals, and the gap between adjacent grouting pipes 10 serves as a fluid flow channel between the inlet end of the communication hole 15 and the steel mesh 11 , the grouting pipe 10 is arranged with a plurality of grouting holes along the axis, and the openings of the grouting holes face the steel mesh 11;

[0073] S3, complete the erection of the coaming plate 1, and the outer wall of the outer plate is attached to the grouting pipe 10;

[0074] S4. ...

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Abstract

The invention discloses a system and method for sand-gravel strata foundation pit precipitation and excavation construction. The system comprises a foundation pit supporting assembly, wherein the foundation pit supporting assembly comprises a surrounding plate, and the surrounding plate is of a hollow plate-shaped structure. The surrounding plate comprises an outer side plate for connecting with afoundation pit and an inner side plate close to the center of the foundation pit. A plurality of communicating holes penetrating through the inner and outer sides of the outer side plate are formed in the outer side plate. An exhaust opening penetrating through the inner and outer sides of the inner side plate is formed in the inner side plate. The fluid conduction capability of the exhaust opening is adjustable. The system further comprises a water tank fixed to the inner side plate, wherein an outlet end of the exhaust opening is located in the water tank. The method is based on the system.By means of the scheme of the system and the method, foundation pit excavation and foundation pit inner construction can be facilitated, and meanwhile, foundation pit drainage safety control is facilitated.

Description

technical field [0001] The invention relates to the technical field of foundation pit construction, in particular to a system and method for dewatering and excavating construction of foundation pits in sand egg formations. Background technique [0002] The foundation pit generally refers to the earth pit excavated at the design position of the building foundation according to the elevation of the building foundation and the plane size of the foundation. For foundation pit construction, the foundation pit support system is used as a temporary structure and a safety protection structure to prevent collapse during foundation pit construction. At the same time, during the excavation and construction of the foundation pit, the precipitation of the foundation pit needs to be considered. [0003] Sand-egg geology generally has loose and water-rich strata. In the foundation pit construction of water-rich sand and pebble strata close to important buildings, it is necessary to pay sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D17/04E02D19/06
CPCE02D17/02E02D17/04E02D19/06
Inventor 景军刘梅李伟王俊阿的木且谢言航
Owner CITIC GUOAN CONSTR GRP CO LTD
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