Direction and location slurry injection reinforcing method for particular area in giant rock heap loose body with large porosity

A technology of grouting reinforcement and large porosity. It is applied in the direction of earthwork drilling, mining equipment, tunnels, etc. It can solve the problems of safety accidents, no adhesive force, easy local collapse in excavation, etc., and achieve the grouting position and grouting Quantity control, easy grouting position and grouting volume, and good orientation
CN106930769AInactive Publication Date: 2017-07-07CHINA RAILWAY 18TH BUREAU GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA RAILWAY 18TH BUREAU GRP CO LTD
Publication Date
2017-07-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a directional positioning grouting reinforcement method for a specific area in a large rock heap loose body with a large porosity. Sleeve valve layered grouting process is adopted, and quick-setting expansion grout is injected layer by layer to form a surrounding grout-stop curtain wall. The bottom grout-stop curtain wall is closed with the surrounding grout-stop curtain walls to form a "U"-shaped grout-stop curtain that limits the grouting reinforcement range of the rock pile. Cement water glass double slurry is used for grouting construction of "U" type grout-stop curtain inside the grout-stop curtain. Finally, ordinary cement slurry is used in the double-layer "U" grout-stop curtain to carry out the grouting reinforcement construction of the rock heap loose body. The invention has good economical efficiency, and can effectively prevent a large amount of grout from being lost due to the overhead structure in the loose rock heap in the ordinary grouting process through the application of the "U"-shaped grouting curtains on the inner and outer layers of the grouting area. The speed is fast, the work efficiency is high, and the total management cost is low.
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Description

technical field

[0001] The invention relates to the technical field of directional positioning grouting reinforcement construction in a giant rock pile loose body with a large porosity, in particular to a method for directional positioning grouting reinforcement in a specific area of ​​a large rock pile loose body with a large porosity. Background technique

[0002] The scale of rock piles at the entrance of Daqian Shiling Tunnel is extremely large. The range of rock piles covers almost the entire mountain body from the foot of the mountain to the top of the mountain. The rock piles are wedge-shaped with thin upper part and thicker lower part attached to the mountain body. °, the thickness of the rock pile is 26.3-48.4 meters, and the lower part of the rock pile extends into the river along the mountain. The rock piles are mainly composed of rocks of different sizes, the rock is the quartz sandstone of the Diaoyutai Formation (Z1d) in the Early Sinian system, and the diamete...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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