A combined casing, system and method suitable for tunnel TSP prediction

Abstract

The invention discloses a combined casing pipe suitable for tunnel tsp forecast, a system, and a method. The casing pipe is easy to assemble, is convenient to recycle, and is simple in measurement. An inner casing pipe and an outer casing pipe are in threaded connection, thereby achieving a function of protecting a sensor. Surrounding rocks, the sensor and the casing pipes are tightly coupled together, thereby guaranteeing the collection efficiency of signals. Meanwhile, the threaded connection can enable a part of components of the casing pipe to be recycled, thereby reducing the consumption of the casing pipe and improving the economic benefits. An angle measurer completes the measurement of the azimuth and inclination angle of the casing pipe through a built-in gyroscope. Most of parts are made of resin material with certain plasticity and steel, and the components are combined in a separated or segmented manner. The casing pipe can effectively protect the coupling among the sensor, the casing pipe and the surrounding rocks, and guarantee that the sensor can achieve the effective receiving of a TSP detection signal. Meanwhile, a part of components of the casing pipe can be recycled, thereby reducing the consumption of the casing pipe and improving the economic benefits.

Description

technical field [0001] The invention relates to a combined casing suitable for tunnel TSP prediction, a system and an operation method. technical background [0002] In modern tunnel construction, in order to ensure the safety of tunnel construction, the method of advanced geological prediction is often used to reduce the engineering risk during construction. As an advanced geological prediction method, the Tsp seismic wave emission method is widely used because of its convenient operation and high accuracy of detection results, and it is used as an escort in tunnel construction. [0003] In the tunnel Tsp measurement, in order to ensure the quality of the transmitted and received signals, 24 blastholes and a signal receiving hole need to be arranged. In the signal receiving hole, first put a steel sleeve to protect the sensor, and then put the sensor. Receive seismic wave signals. The general method is to drill the receiving hole 24 hours in advance, fill the hole with ep...

AI Technical Summary

Problems solved by technology

After the measurement, the sleeve cannot be taken out, and the cost of the sleeve is relatively high, which virtually causes a waste of resources

In order to reduce the consumption of the casing, in the actual operation on site, it often occurs that the surrounding rock and the casing are not coupled, or a small amount of coupling is performed, which cannot ensure the effective reception of the seismic wave reflection signal by the sensor

Images