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Underground engineering loess tunnel ground surface settlement control construction process

A technology for loess tunnels and construction techniques, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of less research on loess tunnel construction and excavation technology, errors in results and support parameters, and lack of engineering practice. Property optimization, reliable data assurance, the effect of improving strength

Inactive Publication Date: 2016-06-15
SHANDONG UNIV OF SCI & TECH +1
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AI Technical Summary

Problems solved by technology

[0003] Foreign researches mainly focus on the construction and support of tunnels in loess areas; domestic researches are relatively complicated. On the other hand, different soil properties have different characteristics, even if the same soil is in different regions, the properties are often different due to water quality, environment, climate, etc.
Most domestic scholars have conducted research on the safe excavation and support technology of loess tunnels, the influencing factors of surface settlement and deformation, etc., but there are relatively few studies on the construction and excavation technology of loess tunnels, and there are many issues that are debatable. Some studies are mainly focused on loess tunnels, but the properties of loess in the loess area are complex and changeable, and the research results are relatively limited; some studies use numerical simulation to dynamically analyze the settlement and deformation of tunnels , but during the construction process of the tunnel, the construction support parameters are constantly changing, and there are large errors between the simulation results and the support parameters; engineering practice

Method used

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  • Underground engineering loess tunnel ground surface settlement control construction process
  • Underground engineering loess tunnel ground surface settlement control construction process
  • Underground engineering loess tunnel ground surface settlement control construction process

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Embodiment Construction

[0039] The present invention is based on the engineering geology of the DK73+779~DK73+834 sections and DK75+054~DK75+089 sections of the Taixing Railway TXXS-2 Xiaohegou Tunnel, and the specific implementation descriptions are described:

[0040] exist figure 1 In the middle, the subsidence of the vault is measured with a spirit level, an indium tile ruler and a hook ruler, and the surrounding convergence is measured with a convergence meter. ) and before the next cycle of excavation to measure the initial reading, and install it within 2m from the excavation surface; the measurement points for the peripheral convergence measurement are in the same section, and should be carried out in the shallow buried section of the tunnel. The arrangement is in the same section as the measurement points of vault subsidence and surrounding convergence measurement; the surface subsidence measurement starts at (h+9) m in front of the excavation face (h is the buried depth of the tunnel), unti...

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Abstract

The invention relates to the underground engineering loess tunnel safety construction field, and especially relates to the underground engineering loess tunnel ground surface settlement control construction process with strong pertinency and simple technology; settlement deformation monitor measurements are taken so as to realize dynamic monitor measurements in tunnel excavation construction, thus providing reliable data guarantee for safety construction; measurements like advanced support, steel arch centering support and timely concrete injection are taken so as to ensure tunnel surrounding rock composition stabilization; lime soil compaction piles are used for reinforcing the loess layer, and 37 lime soil is refilled, thus greatly improving construction security and composition stability; in construction, quicklime is used for chemical modification, thus optimizing loess property, improving loess intensity, and ensuring tunnel stabilization and safety.

Description

technical field [0001] The patent of the invention relates to the field of underground engineering tunnel construction, in particular to a construction technology for controlling ground settlement of a shallow-buried loess tunnel. Background technique [0002] With the rapid development of railway engineering, the construction and support technology of loess tunnels have gradually developed. However, due to the material properties, strength properties and engineering properties of loess, loess tunnels often cause surface subsidence and deformation and collapse accidents. Therefore, it is necessary to study the characteristics of loess, formulate loess tunnel excavation construction and support technology, and deeply study the control measures of surface settlement and deformation. [0003] Foreign research mainly focuses on the construction and support of tunnels in the loess area; domestic research is relatively complex. On the other hand, different soils have different ch...

Claims

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Application Information

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IPC IPC(8): E21D9/04E21D11/00
Inventor 王清标张聪吕荣山王天天许垒胡忠经白云张军贤乔培贞孙金泽马天明苏斌林宪广张珂刘正银王成军张明晶路林海
Owner SHANDONG UNIV OF SCI & TECH
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