Karst roadbed grouting process

A process and roadbed technology, applied in the field of grouting technology of karst roadbed, can solve the problems of difficult control of grouting amount, long initial setting and final setting time, etc., to ensure the grouting effect, shorten the initial setting and final setting time, and ensure rigidity and stability. the effect of strength

Inactive Publication Date: 2013-01-23
CHINA RAILWAY 19 BUREAU GRP CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The invention provides a karst roadbed grouting process, which is used to solve the problems of difficult control of the grouting amount and long initial and final setting time in the existing karst grouting process in the karst roadbed section.

Method used

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  • Karst roadbed grouting process
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  • Karst roadbed grouting process

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] figure 1 Shown is the flow chart of the karst subgrade grouting process in the embodiment of the present invention. Such as figure 1 As shown, the karst subgrade grouting process in the embodiment of the present invention comprises:

[0034] S1. Evenly distribute the grouting holes on the karst roadbed working face, and use a certain number of grouting holes as pilot holes.

[0035] In engineering construction, karst subgrades generally include embankments and road cuttings, such as figure 2 As shown, in order to realize the uniform distribution of grouting holes 2 (indicated by ○ in the figure), the grouting holes 2 in the embankment section S are arranged in ...

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Abstract

The invention discloses a karst roadbed grouting process, belonging to the technical field of grouting processes. According to the karst roadbed grouting process, a certain number of grouting holes are selected as pilot holes; rock core morphology data are obtained while the holes are drilled so as to confirm the morphology of rock cores, thereby determining a grouting scheme of the grouting holes, for example, for large karst caves, sand can be grouted firstly and grout can be filled secondly, and for small karst caves, the grout can be filled directly, so that the grouting quantity can be controlled well, and the grouting effect is ensured; the hole drilling and grouting of later grouting holes can be instructed by using the geological condition and construction processes summarized from the pilot holes; the grouting can be carried out on a large number of normal holes, thereby being beneficial for construction of large area; by adopting a CS (Cement-Sodium Silicate) double liquid grouting mode, the time in initial set and final set is greatly shortened, the rigidity and strength of the grout after being solidified are ensured, and the instant construction after the grouting is realized.

Description

technical field [0001] The invention relates to the technical field of grouting technology, in particular to a karst roadbed grouting technology. Background technique [0002] Karst grouting construction is the use of inert materials (such as water glass, double-liquid slurry with water glass added to single-liquid slurry is commonly known as CS double-liquid slurry), which is injected into karst fissures, caves and soft plastic under a certain pressure. In the pores of clay bodies, firstly, karst caves and karst fissures are filled, and secondly, the rock-soil interface is closed to form a water-proof curtain to block the connection between stagnant water in the upper layer and karst water; if there is a weak interlayer in the soil, then the soil is reinforced Weak interlayer. Through the rigidity and strength of the grouting filling fluid after solidification, the properties of the rock layer and soil are changed, the deformation of the rock and soil is restrained, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/04
Inventor 罗慎杰王晓琳韩士钊徐长久
Owner CHINA RAILWAY 19 BUREAU GRP CO LTD
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