Auxiliary device for monitoring and measuring convergence points in tunnel construction by cross diaphragm (CRD) method and method for burying auxiliary device

Abstract

The invention relates to an auxiliary device for monitoring and measuring convergence points in the tunnel construction by a cross diaphragm (CRD) method and a method for burying the auxiliary device. The auxiliary device comprises an embedded fixed rod, a nut washer, a fixing nut, a measuring point connecting rod and a measuring point hook, wherein an expansion bolt head is formed at one end of the embedded fixed rod and is provided with an expansion piece, and the nut washer and the fixing nut are arranged at the other end of the embedded fixed rod; and the measuring point hook is arranged at one end of the measuring point connecting rod and is used for connecting a steel ruler convergence meter for measurement, and a threaded caliper retaining groove is formed at the other end of the measuring point connecting rod. When buried, the embedded fixed rod can be fixed in a tunnel side wall by putting the expansion bolt head formed at one end of the embedded fixed rod into a drilled hole and knocking the other end of the embedded fixed rod to ensure that the expansion piece expands to extrude surrounding rock; and the embedded fixed rod can be closely connected with the threaded caliper retaining groove because a thread is formed at the other end of the embedded fixed rod, and the measuring point hook on the measuring point connecting rod is used for connecting a convergence hook on the steel ruler convergence meter during measurement. The invention has the advantages that: the cost of manufacturing materials is low, the arrangement method is simple, measuring points can be effectively prevented from being damaged and the like.

Description

technical field [0001] The invention relates to the field of monitoring and measuring, in particular to an auxiliary device for monitoring, measuring and converging measuring points in tunnel CRD method construction and an embedding method. Background technique [0002] Monitoring and measurement technology is an important part of modern tunnel construction and an important means to monitor the stability of surrounding rock and structure. When carrying out tunnel construction, especially for the construction monitoring and measurement of surrounding rock tunnels above grade IV, it is essential. It is a key process to ensure the safety and reasonableness of the initial support and to determine the time of secondary lining construction, and it has important guiding significance for the connection of various construction processes in the cave. The design parameters are corrected through monitoring and measurement and timely information feedback to achieve the purpose of reasona...

AI Technical Summary

Problems solved by technology

[0003] In order to obtain the surrounding rock deformation data during the excavation of the face in time, the monitoring points are often arranged not far from the excavation section, and a large part of the convergent measuring point hooks arranged in the past are exposed outside the side wall, which has disadvantages Yes, due to the blasting of the face, the gravel may hit the laid measuring point, or the slag removal truck and forklift may touch the measuring point, which will cause the measuring point hook to be deformed

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