A method for drilling and grouting construction in sand and gravel formation

Abstract

The invention belongs to the technical field of civil engineering, and relates to a method for drilling and grouting construction in sand and gravel formations, comprising: (1) drilling and following pipes to drill into a wall casing; (2) running into a grouting pipe; 3) Install the orifice blocker; (4) According to the grouting procedure, adopt the appropriate water-cement ratio to start grouting and change the grout until the grouting is completed; (5) Grouting construction. The invention has the beneficial effects of solving the problem that the flower tube enters the gravel formation. The embedding depth is controllable, which is easier than the plugging method; it prevents the sand and gravel strata from collapsing during the process of pulling out the casing, which causes the flower tube to be blocked, and solves the problem that the sand and gravel stratum cannot be effectively grouted; simplifies the grout stopper It is difficult to install and operate; it has little effect on the grouting diffusion radius; it overcomes the process defects and the grouting quality is reliable; it is suitable for any sand and gravel stratum and can be implemented without process tests, especially in areas with complex strata.

Description

technical field

[0001] The invention belongs to the technical field of civil engineering, and relates to a drilling and grouting construction method for sand and gravel formations. Background technique

[0002] 1 The main methods of drilling grouting in sand and gravel formations. At present, when grouting sand and gravel formations at home and abroad, the following methods are usually adopted: 1) Grouting with flower tubes; Bottom-up (top-down) segmental plugging grouting; 3) mud wall solidification, top-down segmental, orifice sealing grouting; 4) pre-embedded flower tube grouting, etc.

[0003] 2 The main methods and principles of grouting construction in sand and gravel strata are as follows:

[0004] 2.1 Grouting for flower tubes:

[0005] Grouting with flower tubes is to drive the thick-walled seamless steel pipe with flower tubes directly into the irrigated stratum, and use it to directly connect to the grout delivery pipeline for grouting. The main construction met...

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