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A construction method and protective tooling of a tunnel deformation monitoring point

A deformation monitoring and protection tooling technology, which is applied to measurement devices, earth-moving drilling, mining devices, etc., can solve the problems of difficult construction, inaccurate measurement, and easy contamination of deformation monitoring points, and achieve convenient construction, avoid pollution, No effect of measurement error

Active Publication Date: 2021-12-28
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the deformation monitoring points in underground engineering such as tunnels existing in the prior art are difficult to construct, easy to be fouled and lead to technical defects in inaccurate measurement

Method used

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  • A construction method and protective tooling of a tunnel deformation monitoring point
  • A construction method and protective tooling of a tunnel deformation monitoring point

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Please refer to figure 1 and figure 2 , Embodiment 1 of the present invention provides a construction method of a tunnel deformation monitoring point, and the specific construction method is as follows:

[0031] After the installation of the steel frame 1 is completed, the observation site is determined on the steel frame 1, and the monitoring point 2 is installed on the observation site. The monitoring point 2 includes a main body 20 and a reflective sticker pasted on the main body. The main body 20 is round or square except stainless steel sheet;

[0032] After observing the monitoring point 2 and recording the initial degree, wrap the reflective stickers with a blocking object;

[0033] Before spraying concrete, the protective tooling 3 is connected to the steel frame 1 around the monitoring point 2, and the monitoring point 2 is placed in the protective tooling;

[0034] After spraying the concrete and before the concrete is hardened, remove the protective tooli...

Embodiment 2

[0042] Please refer to figure 2 , Embodiment 2 of the present invention provides a protective tooling, comprising: a cover body 30 with one end open, and a bayonet 31 is provided on the open end, and the bayonet 31 is two slits 32 extending from the end face of the open end to the other end, and the two The slits 32 are arranged symmetrically and have the same cutting depth.

[0043] Further, the specific structure of this embodiment is as follows: the cover body 30 includes a cylinder and a geotextile, one end of the cylinder is open, and the other end is covered with a geotextile. In this embodiment, the geotextile is fixed on one end of the cylinder by winding steel wires. It can be taken from the geotextile hung on the surface of the primary support when the tunnel is used as the secondary lining. It has a certain anti-puncture ability, and its size can only be sealed at one end of the cylinder. It can be used locally to save costs. The cylinder is made of PVC material, th...

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Abstract

The invention provides a construction method and protective tooling for tunnel deformation monitoring points, which belong to the technical field of tunnel engineering monitoring and measurement. In terms of location, the monitoring point includes the main body and the reflective sticker pasted on the main body. The main body is a round or square rust-removing steel sheet; after observing the monitoring point and recording the initial degree, wrap the reflective sticker with a shield; before spraying concrete, place The protective tooling is connected to the steel frame around the monitoring point, and the monitoring point is placed in the protective tooling; after the concrete is sprayed and before the concrete is hardened, the protective tooling is removed and the shield is removed; the protective tooling is a cover with an opening at one end, and the opening The end is provided with a bayonet, and the cover body is clipped with the flange plate of the steel frame through the bayonet. The main body of the monitoring point of the present invention is welded on the steel frame, which is firm and reliable, and the monitoring point is protected by double measures of protective tooling and shelters to avoid contamination of the monitoring point.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering monitoring and measurement, and in particular relates to a construction method and protective tooling for tunnel deformation monitoring points. Background technique [0002] In the construction process of tunnels and other underground projects, arch settlement and headroom convergence are the most intuitive manifestations of dynamic changes in surrounding rocks, which can reflect the stability of surrounding rocks, the rationality of construction methods and support parameters, especially in weak strata, tunnel excavation Afterwards, large deformations are likely to occur, and on-site monitoring and measurement are extremely important to guide the safe construction of tunnels. Through the analysis and prediction of on-site monitoring data of arch settlement and headroom convergence, it can provide a basis for adjusting construction steps, choosing reasonable support timing and support p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00G01B11/16G01C5/00
CPCE21F17/00G01B11/16G01C5/00
Inventor 张朝轩谭贤君陈卫忠田洪铭袁敬强苏舟舟
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI