Anti-slurry-leaping soil body deep settlement measuring device and measuring method

Abstract

The invention discloses an anti-slurry-leaping soil mass deep settlement measuring device and method, and the device comprises a protection tube, a settlement mark, an anti-slurry-leaping corrugated telescopic tube which is connected with the protection tube and a bottom plate of the settlement mark, a joint, and a waterproof rubber pad. The settlement mark comprises a settlement plate at the bottom, a mounting base, a measuring rod which is connected with the mounting base and is directly communicated with the ground, and a high-precision settlement measuring device. The device disclosed by the invention is good in structural sealing performance, can obtain short-distance high-precision vertical displacement data of a soil layer around a tunnel, and effectively solves the problem of slurry leaping caused by short-distance installation of a conventional deep displacement monitoring device.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering soil subsidence monitoring, and in particular relates to a deep subsidence measurement device and a measurement method for anti-slip soil that are suitable for disturbance monitoring of shield tunnel construction. Background technique [0002] Urban subway tunnels are often very close to surrounding structures. In order to ensure the safety of the surrounding environment and avoid construction accidents, it is very important to obtain high-precision data of near-field displacements around the tunnel caused by shield tunneling. [0003] At present, the conventional deep soil vertical displacement measurement devices mainly include magnetic ring type settlement instrument, deep punctuation level and so on. However, the conventional measuring device has the following problems: 1. For the monitoring of the vertical deformation of the soil caused by the shield, the conventional deep pu...

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Problems solved by technology

However, the conventional measuring device has the following problems: 1. For the monitoring of the vertical deformation of the soil caused by the shield, the conventional deep punctuation leveling device cannot form a seal, and if there is a slurry, it is easy to cause an accident; 2. The magnetic ring Although the type sedimentation instrument can form a seal, the measurement accuracy is low, generally up to 1-2mm. In the actual measurement process, the accuracy is often lower due to human factors in the interpretation. The actual accuracy may only be 10mm, and in many cases Under normal circumstances, the maximum value of vertical displacement caused by shield tunneling is often less than 10mm, and the accuracy obviously does not meet the requirements

[0004] Wang Qingman and others proposed a deep settlement monitoring device in the Chinese patent application "A Deep Settlement Monitoring Device and Method for Burying a Settlement Mark", including a settlement mark, a static level installed on the top of the settlement mark, and a monitoring device for rock and soil settlement data. The monitoring device for monitoring, the settlement mark includes the settlement base and the center pole installed on the top of the settlement base, the monitoring device includes the data acquisition module connected with the static level and the data monitoring terminal connected with the data acquisition module, but this technology is in During the measurement of the shield machine excavation, the deep soil displacement can only be measured at a position far away from the tunnel, and it cannot be measured around the tunnel because its lower part is not sealed. If the shield is measured at a position very close to the tunnel, Structural grout will be ejected from the pores and cause disaster

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