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A pre-buried grouting unit and soft ground settlement control system and method

A technology for settlement control and weak ground, applied in earthwork drilling, underground chambers, shaft equipment, etc., can solve problems such as uneven stress, weak flexibility, and horizontal unevenness in double-arch tunnels, and achieve multi-directional solutions Uneven settlement, wide application range and strong flexibility

Active Publication Date: 2020-12-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Second, the large-section double-arch tunnel has a complex mechanical structure and bears the coupling effects of formation stress, pipeline water seepage pressure, and formation thermal effects in a complex environment.
In addition, the large-section double-arch tunnel may bear asymmetric stress
Long-term effects lead to uneven or asymmetrical stress in the same section of the double-arch tunnel, causing the overlying strata to have different settlements at the left and right arches, resulting in uneven lateral settlement
[0006] In addition, the current strata subsidence control technology in my country is usually only aimed at a specific rock and soil mass or stratum characteristics, which is weak in flexibility and poor in adaptability.

Method used

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  • A pre-buried grouting unit and soft ground settlement control system and method
  • A pre-buried grouting unit and soft ground settlement control system and method
  • A pre-buried grouting unit and soft ground settlement control system and method

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Embodiment 1

[0036]This embodiment provides a pre-buried grouting unit, which is suitable for the soft ground of a shallow-buried large-section double-arch tunnel, such asfigure 2 As shown, including the initial section, the settlement reading section 14, the slurry diffusion and anchoring section, and the end section, the embedded grouting unit has a hollow grouting cavity 16 inside.

[0037]The initial section is a grouting machine interface 13, the grouting machine interface 13 has an external thread for connecting with the grouting machine, and the grouting machine injects the slurry 19 into the embedded grouting unit through the grouting machine interface 13.

[0038]The settlement reading section 14 is set between the initial section and the first section of slurry diffusion and anchoring section. The settlement reading section 14 is provided with a length scale value, the smallest accurate scale is 1mm; the total length can be determined according to the actual situation, generally Is 500mm. Wh...

Embodiment 2

[0045]This embodiment provides a soft stratum settlement control system, which includes several embedded grouting units 12 described in the first embodiment, a fixed plate 20 connected to the embedded grouting unit 12, and embedded grouting units 12 After being buried in the ground, it is welded with the fixed plate 20 in the primary reinforcement mesh 21.

[0046]Such asfigure 1 withFigure 4 As shown, the embedded grouting unit 12 is arranged in multiple groups along the length of the tunnel, and each group has multiple groups. Several sets of pre-buried grouting units 12 are arranged in a straight line along the tunnel direction, thereby widely covering the overlying stratum area of ​​the tunnel, achieving the purpose of overall stratum reinforcement. In this embodiment, one set of embedded grouting units 12 is set every 10m, and the spacing can be shortened to a set of 5m or less when the formation is poor.

[0047]In this embodiment, six embedded grouting units 12 are embedded at the...

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Abstract

The invention discloses a pre-buried grouting unit, a soft stratum settlement control system and a construction method of the system. The problem of multi-direction differential settlement existing ina shallow-buried double-arch tunnel in the prior art is solved, a stratum settlement value can be recorded while the stratum settlement is controlled, and the purpose of combination of prevention andcontrol and monitoring are achieved. According to the technical scheme, the pre-buried grouting unit comprises a starting section, a settling volume reading section, one or more slurry diffusion andanchoring sections and a tail section which are sequentially arranged, and each slurry diffusion and anchoring section comprises a slurry diffusion section and an anchoring section which are connectedinto a whole; and the slurry diffusion sections are provided with diffusion openings used for slurry diffusion, and threads are arranged on the outer sides of the anchoring sections.

Description

Technical field[0001]The invention relates to the field of geotechnical engineering, and in particular to a pre-buried grouting unit and a system and method for controlling the settlement of weak stratum.Background technique[0002]With the further development of the economy and the introduction of the outline for building a strong transportation country, more transportation infrastructure is in urgent need of construction. In order to develop and utilize underground space resources, various functional building facilities are built in the stratum, collectively called tunnels. According to changes in functions and geological environment, traditional tunnels have evolved various new structures and construction methods, and difficulties and challenges have arisen accordingly.[0003]Generally, when the mountain is not high, the longitudinal length is short, the cross slope is steep, and the downward line, the highway upward and downward lines are inseparable, a double-span double-arch tunn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21D9/00E21D11/14
CPCE21D9/001E21D11/10E21D11/105E21D11/14
Inventor 薛翊国宁泽旭林春金孔凡猛公惠民傅康
Owner SHANDONG UNIV