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A kind of grouting reinforcement construction method for underground engineering

A technology of grouting reinforcement and construction method, which is applied in basic structure engineering, construction and other directions, can solve the problems of serious grouting, water and sand gushing, etc., and achieves the effect of simple construction method, prevention of grouting, and easy operation of the construction method.

Active Publication Date: 2018-02-23
SHANGHAI CHANGKAI GEOTECHN ENG
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Problems solved by technology

[0003] When there are cavities in the ground below the foundation floor that need to be reinforced, if a one-time opening is made on the foundation floor, it will cause a large amount of water and sand gushing at the opening, which will bring huge risks to the project, and in this case of water and sand gushing The foundation soil is reinforced by grouting, and the grouting after grouting is extremely serious

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  • A kind of grouting reinforcement construction method for underground engineering

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Embodiment

[0014] Example: as figure 1 As shown in the figure, in order to overcome the shortage of a large amount of groundwater gushing due to drilling through the foundation floor during the grouting reinforcement process in the existing basement, and the serious shortage of the grouting during grouting reinforcement, this embodiment provides a grouting for underground engineering. The reinforcement construction method, the grouting reinforcement construction method comprises the following steps:

[0015] (1) First, a groove 2 with a certain depth is opened on the base plate 1 in the basement corresponding to the position to be grouted and strengthened below. In the case of a cavity, the groove 2 changes from large to small in a two-stage stepped shape, the small hole in the lower section is adapted to the pipe diameter of the casing 3 installed later, and the diameter of the large hole in the upper section is larger than the pipe diameter of the casing 3 installed later;

[0016] It...

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Abstract

The invention discloses a grouting reinforcement construction method for underground engineering. The grouting reinforcement construction method for underground engineering comprises the following steps: forming a groove in a foundation slab, wherein the groove corresponds to a position to be reinforced below the foundation slab; fixedly arranging a sleeve with a switch valve in the groove; opening the switch valve; drilling through the foundation slab by using a drill pipe in the sleeve until a grouting hole is formed in a soil body below the foundation slab; then lifting the drill pipe away from the sleeve and closing the switch valve; connecting an upper port of the sleeve to a grouting machine; opening the switch valve; carrying out grouting reinforcement on the inside of the grouting hole below the sleeve by using the grouting machine; and closing the switch valve after grouting is finished. The grouting reinforcement construction method for the underground engineering has the advantages that the sleeve with the switch valve is fixed on the foundation slab, a method of forming the hole step by step is adopted to prevent abrupt gush of underground water after the foundation slab is drilled through and mud returning during grouting reinforcement, and risks can be controllable.

Description

technical field [0001] The invention belongs to the technical field of underground engineering, and particularly relates to a grouting reinforcement construction method for underground engineering. Background technique [0002] At present, with the gradual extension of the construction project underground, the basement is getting deeper and deeper. When the elevation of the foundation floor is lower than the water level in the area, the groundwater below the foundation floor has a certain head, so the foundation floor will be subject to the buoyancy of the groundwater. [0003] When there are voids in the stratum below the foundation floor that need to be reinforced, if a one-time opening is made on the foundation floor, a large amount of water and sand will be gushed at the opening, which will bring huge risks to the project. The foundation soil was grouted for reinforcement, and the back-grouting situation after grouting was extremely serious. SUMMARY OF THE INVENTION ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/16
CPCE02D19/16
Inventor 顾国荣郭星宇王克文陈晖杨砚宗张晓晖毛明强
Owner SHANGHAI CHANGKAI GEOTECHN ENG
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