Multi-stage telescopic operation method for monitoring hole sealing quality of exploration hole in mudstone stratum

Abstract

The invention discloses a multi-stage telescopic operation method for monitoring the hole sealing quality of an exploration hole in a mudstone stratum. The method comprises the following steps: (1) carrying out device deployment, and excavating the exploration hole; determining the lowering depth of the device; according to the diameter of the exploration hole, determining the length and the outer wall diameter of a lowering grouting reuse pipe, the inner wall diameter of the reuse pipe and the diameter and the height of a monitoring device shell; carrying out preparation for lowering; carrying out lowering and scanning the hole wall; conducting grouting; lowering a monitoring device; unfolding the monitoring device; continuing grouting; sealing the top; (2) monitoring and early warning: at a certain moment, due to poor hole sealing quality, enabling surface water to seep down along the exploration hole so as to increase the humidity in the exploration hole; and when a top hygrometer and a side hygrometers monitor humidity change, triggering humidity early warning, and enabling early warning information to be transmitted to a ground monitoring station through ultrasonic receiving and transmitting sonar. The method can be used for long-term monitoring of the sealing quality of the exploration hole, has the functions of intelligent early warning, underground positioning and data transmission, and can guarantee the construction safety of a shield in a mudstone-containing stratum.

Description

Technical field [0001] The present invention belongs to the field of shield construction technology, and more particularly to a multi-stage telescopic operation method for monitoring the sealing quality of the mudstone formation exploration hole. Background technique [0002] The underground space is a valuable resource of a city. In recent years, as people's demand for travel is growing, the ground road traffic has not satisfied people's needs, and many cities have begun to explore underground rail transit to subway. The subway construction is inseparable from the shield tunnel construction. Since the shield construction needs to pass many formations, detailed engineering geological surveys must be performed before construction. [0003] Drilling is a common means of engineering geological surveys. After the drilling is completed, we should cover the exploration holes, otherwise the rain water in the ground will penetrate into the formation along the exploration hole, affect the...

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Problems solved by technology

[0004] In order to overcome the fact that the existing shield construction monitoring device and its operation method cannot carry out long-term monitoring of the sealing quality of the exploration hole in the mudstone formation, cannot monitor the humidity change in the hole, cannot fully understand the situation in the hole, and cannot be used for the exploration of the mudstone formation The problem of hole sealing quality monitoring can realize long-term monitoring and early warning of the sealing quality of exploration holes in mudstone formations, and effectively improve the safety and quality of shield construction. The invention provides a method for monitoring the quality of sealing holes in mudstone formation exploration holes. The multi-stage telescopic operation method can not only be used for long-term monitoring of the sealing quality of exploration holes, but also has the functions of intelligent early warning, underground positioning, and data transmission, which can ensure the safety of shield construction in mudstone formations

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