A kind of casing suitable for tsp tunnel geological forecast

Abstract

The invention discloses a casing pipe suitable for TSP tunnel geological advance prediction and a working method. The casing pipe comprises a threaded pipe body, an inclination angle sensor, a pipe end anchoring base plate, an auxiliary wrench and a metal casing pipe protection cover. The threaded pipe body comprises a conical casing pipe tip with a thread and a cylindrical casing pipe rod body with the thread, and a chemical non-stick coating covers a surface. A detector cavity is arranged in the threaded pipe body. A guide groove which is good for the installation and the coupling of a detector is arranged in the detector cavity. The inclination angle sensor can measure the horizontal angle and the vertical angle of a casing pipe and provides data reference for the installation and the positioning of a metal casing pipe. The pipe end anchoring base plate comprises a base plate, a high-strength bolt and a stop-grouting plug. A screw wrench is used when the metal casing pipe is installed and recycled. During recycling, through cooperating with the fixation effect of the pipe end anchoring base plate, the metal casing pipe can be screwed out. The metal casing pipe protection cover prevents the impurities of sand, dust and the like from entering into the casing pipe when the metal casing pipe is transported and used.

Description

technical field [0001] The invention relates to the field of geological advance prediction of TSP tunnels, in particular to a casing suitable for geological advance prediction of TSP tunnels and a working method. Background technique [0002] In order to effectively avoid the occurrence of tunnel geological disasters such as water and mud inrush, rockburst, and landslides during tunnel construction, various methods such as geological radar technology, TSP advanced prediction technology, TST advanced prediction technology, and infrared water detection method are usually used to monitor the tunnel. The geological conditions in front of the tunnel face are artificially predicted, and the engineering and hydrogeological conditions in front of the tunnel face are judged before further tunnel construction, so as to effectively guarantee the construction progress and safety of the tunnel. [0003] Among various forecasting methods, the geological advanced forecasting technology of ...

AI Technical Summary

Problems solved by technology

At this stage, the metal casing used in TSP tunnel geological advanced prediction technology has many disadvantages: 1. The metal casing cannot be recycled after being tightly consolidated with the surrounding rock by an anchoring agent such as epoxy resin. If the metal casing is forcibly dragged, it is easy to cause metal The deformation of the casing can not be recycled, and the value of two metal casings is nearly ten thousand yuan. The consumption of metal casings has caused a serious waste of resources; 2. Since the length of the receiving hole in the surrounding rock is as long as 2m, the anchoring agent such as epoxy resin There is often a problem of uneven stirring with the curing agent, which makes it difficult to guarantee the anchoring effect between the anchoring agent such as epoxy resin and the metal casing, thus affecting the coupling between the metal casing and the borehole wall and causing signal interference; 3. Metal casing In the process of use, it is inevitable to scrape with the surrounding rock around the drilling, which is easy to cause wear and corrosion of the metal casing; 4. The metal casing is prone to physical and chemical reactions under the action of chemical anchoring agents such as epoxy resin, which affects The performance of the metal casing; 5. The square casing used at this stage cannot completely match the circular borehole, which wastes anchoring agent and seriously affects the coupling effect between the casing and the surrounding rock, and the square casing is difficult to adjust after entering the borehole The position and angle affect the working effect of the geophone

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