Mounting method of safety monitoring instrument for ultra-deep covering layer work well

Abstract

The invention discloses a mounting method of a safety monitoring instrument for an ultra-deep covering layer work well. Clear water is injected into pre-buried clinometer pipes, the pressure of part of outside ultrahigh cement-water mixtures is balanced, the pre-buried clinometer pipes are prevented from suffering from extrusion deformation, and normal work of the pre-buried clinometer pipe is guaranteed. A fixed pulley is mounted at the top of an upper reinforcement cage, a lead-out cable of the monitoring instrument can be rapidly laid, and the construction efficiency of instrument cable laying can be improved. An air pump and an air cylinder are adopted as power drive, a soil pressure meter is remotely controlled to be actively ejected out to be in reliable contact with detected soil, and operation is convenient and reliable. In the process that the soil pressure meter is actively ejected out, a handheld reading device and an exhaust detection water tank can achieve mutual verification, the pumping process of the air pump can be reflected, and a V-shaped base can remove soil blocks protruding out of the side of the detected soil in the descending process. Under the ultrahigh-density cement-water mixtures, the situation that the induction face of the soil pressure meter is wrapped by concrete to fail is avoided, it is guaranteed that the induction face of the soil pressure meter reliably jacks the detected soil, and the pressure of soil to the surrounding of the work well is reflected accurately.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering safety monitoring, and relates to a method for installing a working well safety monitoring instrument formed by a connecting wall in an ultra-deep covering layer. Background technique [0002] In recent years, my country has vigorously developed underground engineering construction, and there are more and more types of underground engineering, including underground shopping malls, underground civil defense projects, subway tunnels, hydraulic tunnels, etc. The construction of underground engineering is inseparable from the excavation of foundation pits. It is generally believed that the excavation depth of foundation pits reaches 5m or more, which is called deep foundation pits. For some large-scale water diversion projects, the excavation depth of foundation pits is more than 50m. It belongs to the level of ultra-deep foundation pit. During the construction of an ultra-deep found...

AI Technical Summary

Problems solved by technology

[0003] Due to the construction of ultra-deep overburden foundation pits, construction methods such as layered hoisting of steel cages and high-density mud-water mixed retaining walls are usually used, resulting in conventional construction methods such as deformation monitoring and soil pressure monitoring that are no longer applicable to ultra-deep foundation pits installation of safety monitoring equipment

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