Grouting device and in-hole segmented grouting method for a plurality of solution cavities

Abstract

The invention discloses a grouting device and an in-hole segmented grouting method for a plurality of solution cavities. The in-hole segmented grouting method comprises the steps that s1, a drilling machine is used for drilling, and the solution cavities communicate with one another by one-time drilling; s2, the grouting device is installed at the tail end of a grouting drilling rod, and a grouting machine is sent into a specified solution cavity; s3, slurries is poured into the grouting drilling rod, a first check valve is opened by increasing grouting pressure, and a second elastic sleeve pipe of a rear grout stopping device expands to attach closely to the side wall of a drilling hole; s4, a second check valve is opened by further increasing the grouting pressure, the slurries enter thegrouting machine and a front grout stopping device, and a first elastic sleeve pipe of the front grout stopping device expands to attach closely to the side wall of the drilling hole; s5, a fourth check valve is opened by further increasing the grouting pressure, and the slurries are injected into the solution cavities; and s6, the grouting drilling rod is taken out. A construction technology method is adjusted according to the size of the solution cavities and a filling degree in a grouting process, so that an intent layer position is processed with a definite target.

Description

technical field [0001] The application relates to a grouting device and a segmented grouting method for multiple karst caves, belonging to the fields of karst grouting filling, tunnel rock and soil reinforcement, and foundation reinforcement. Background technique [0002] Karst, also known as karst, refers to the chemical and physical action of soluble rocks such as carbonate limestone, dolomite, and sulfate gypsum to produce grooves, cracks and cavities, as well as the collapse of the roof of the cavities. The general term for erosion and accumulation landform features and geological processes such as caves and depressions. [0003] The geological conditions in karst areas are generally more complicated, and the survey is difficult, and the impact and harm they produce are usually relatively large. In cities with developed karst, special geological conditions lead to strong development of karst crevices and karst caves, which can easily cause seepage liquefaction, groundwa...

AI Technical Summary

Problems solved by technology

This method is mostly aimed at the foundation treatment process in the early stage of construction, and when the karst ground subsidence occurs in the completed buildings, due to the limited construction space, the method of vertical drilling on the ground cannot solve the problem.

[0006] The existing grouting treatment of karst cavities mostly relies on vertical exploration holes. Vertical drilling has a better effect on the treatment of single structures and lower construction costs, such as pile foundations and karst cave filling under independent foundations. In the ground treatment of linear structures such as underground pipe corridors, railways, and highways, the effect of ground drilling treatment will be greatly reduced due to the discontinuity and dispersion of karst caves.

At the same time, when the ground construction conditions are complex, and many places do not have the construction conditions of conventional drilling equipment (vertical hole drilling equipment), the construction feasibility of ground drilling and grouting will be greatly reduced. At present, there is no effective treatment method in China to complete such as subway The task of filling and grouting the karst caves encountered in linear construction projects such as tunnels, pipe galleries, etc.

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