Segmented grouting device and grouting method for grouting steel shock tube

Abstract

The invention discloses a segmented grouting device and a grouting method for grouting a steel shock tube, wherein the segmented grouting device comprises a grouting pipe; the bottom end of the grouting pipe is provided with a cylindrical mortar stop plug; the grouting pipe is provided with a plurality of grooves extending in the longitudinal direction; the bottom of each groove is provided with aplurality of mortar ejecting holes; the mortar ejecting holes communicate with the inner and outer sides of the grouting pipe; each groove is internally provided with a sliding rod; the surface, clinging to the bottom of the corresponding groove, of each sliding rod is provided with a sealing layer; the grouting pipe is further provided with an annular column mortar stop plug in a sleeving manner; the annular column mortar stop plug is connected with all sliding rods; the cylindrical mortar stop plug and the annular column mortar stop plug are matched with the inner wall of the steel shock tube; the grouting pipe is further provided with a plurality of annular hoops in a sleeving way; and the annular hoops are used for making the sliding rods cling to the bottoms of the grooves. The segmented grouting device can realize flexible regulation of the length of a grouting section according to actual conditions of a ground layer so that the length of the grouting section is preferably matched with the grouting length which is actually required by the ground layer, so that the soil which needs not to be reinforced is prevented from being grouted additionally, and the construction cost isnot increased and resources are not wasted.

Description

technical field [0001] The invention relates to the field of karst grouting reinforcement, in particular to a segmental grouting device and a grouting method suitable for grouting steel flower pipes with large differences in the development of karst fissures at different depths. Background technique [0002] Grouting technology is an extremely important construction method in geotechnical engineering. At present, the grouting methods commonly used in engineering include grouting pipe grouting method, steel flower pipe grouting method and sleeve valve pipe grouting method. Compared with other grouting processes, steel pipe grouting not only improves the physical and mechanical properties of rock and soil through grouting, but also plays a role of reinforcement, improving the bearing capacity and anti-slip capacity of the foundation. [0003] The existing steel flower tube grouting is usually grouted to reinforce all the soil layers within the drilling depth range, and the le...

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Problems solved by technology

[0004] The purpose of the present invention is to aim at the fact that the grouting of the existing steel flower pipes usually reinforces the entire soil layer within the drilling depth range, and the length of the grouting section cannot be adjusted according to the actual situation of the development of karst fissures, so as to achieve a certain depth and a specified thickness For the purpose of segmental controllable and repeated grouting of the soil layer, a segmental grouting device and grouting method for steel flower tube grouting are provided. The device can flexibly adjust the length of the grouting section according to the actual situation of the stratum, so that the grouting The length of the segment is better matched with the actual grouting length required by the stratum, avoiding additional grouting for the soil that does not need to be reinforced, resulting in increased construction costs and waste of resources

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