Hollow anchor stock circulating pressure slip casting construction method and special slip casting system thereof

Abstract

The invention provides a hollow roof bolt circulating pressure slip casting method and a special slip casting system. The system comprises a hollow roof bolt, a pulp stop plug, a slip casting joint, a pulp outlet pipeline, a pressure gauge, a slip casting machine and a pulp reservoir; one end of a pulp returning pipeline is connected with a pulp returning joint and the other end extends above the pulp reservoir; the other end of the pulp returning joint is inserted into a half-opening lancing on the pulp stop plug and extends into the anchor eye in which the hollow roof bolt is arranged; the pressure gauge and a disconnecting valve are arranged at the pulp returning pipeline. According to the designed slip casting pressure, circulating pressure slip casting is realized in the real sense, thereby greatly improving slip casting construction quality.

Description

technical field [0001] The invention relates to a geotechnical engineering grouting reinforcement method and equipment, in particular to a construction method and supporting system equipment for performing slurry circulation pressurization grouting on anchor holes and surrounding rock formations by using a hollow anchor rod and a grouting machine. Background technique [0002] In the construction process of geotechnical engineering, including underground engineering, tunnel engineering, mining engineering, slope and foundation pit, etc., in order to prevent foundation deformation, collapse or instability and endanger safety, bolts are often used to reinforce and support the ground. effect. Utilize the high-strength tensile capacity of the bolt installed in the anchor hole of the formation and the grouting consolidation formed around the anchor to strengthen the formation to improve the integrity of the formation, thereby controlling the deformation of the formation and keepi...

AI Technical Summary

Problems solved by technology

There are three problems: 1. The exhaust pipe usually adopts a hose and (a section of the inner diameter is only 6-8mm, and the length is 3-4m, so the exhaust pipe is easy to block, and it is often difficult to normally remove the air in the anchor hole. Once the exhaust pipe Blockage affects the filling quality of the anchor hole; 2. Even if the exhaust pipe is not blocked (or if a metal pipe is used, there is a problem of high cost), it cannot be concluded that the slurry in the anchor hole has been filled through the exhaust pipe, because the injection During the grouting process, if the anchor hole is not fully filled, it is inevitable that a small amount of slurry will enter the exhaust pipe and cause slurry return; 3. The filling quality can only be roughly judged by experience, and the anchor hole cannot be accurately adjusted according to the design pressure. Perform pressure grouting construction

Therefore, the traditional grouting method cannot achieve effective pressure grouting, and cannot achieve effective grouting within the diffusion radius based on the anchor hole. The filling of the hole is full, and the pressure diffusion cannot be realized

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