Accurate grouting repairing and reinforcing method for tunnel broken surrounding rocks

A technology for crushing surrounding rock and tunnels, which is used in the field of tunnel surrounding rock stability control to ensure stability, improve overall strength and grouting effect, and restrain deformation.

Active Publication Date: 2020-12-25
HOHAI UNIV
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Problems solved by technology

However, for tunnel surrounding rock grouting, there are few reports on comprehensively using the abo

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  • Accurate grouting repairing and reinforcing method for tunnel broken surrounding rocks
  • Accurate grouting repairing and reinforcing method for tunnel broken surrounding rocks
  • Accurate grouting repairing and reinforcing method for tunnel broken surrounding rocks

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Embodiment Construction

[0055] In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0056] Such as figure 1 Shown: the present invention adopts on-site geological detection technology, borehole peeping instrument, surrounding rock drilling coring technology, geological radar detection technology and CT scanning technology to combine to obtain the surrounding rock mechanical properties (uniaxial compressive strength) before grouting repair. , ...

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Abstract

The invention provides an accurate grouting repairing and reinforcing method for tunnel broken surrounding rocks, and relates to the field of tunnel surrounding rock stability control. The repairing and reinforcing method comprises the steps that drill holes are detection drill holes in different positions of an on-site tunnel, and fracture information in the surrounding rock section is collectedthrough a drill hole peeping instrument, a double-layer rock core pipe tool, a geological radar and CT scanning by means of the drill holes in each detection section; a surrounding rock loosening circle range is determined; and based on the grades of a divided severe broken area, a seriously broken area, a fracture area and a complete area, fracture volumes of different broken areas in the tunnelsurrounding rocks and grouting amounts of the corresponding broken areas are obtained by calculating to form a unified grouting area. The combined geophysical prospecting technology combining drillingpeeping, double-layer rock core taking, geological radar detection and CT scanning is adopted, the surrounding rock internal fracture rule and the characteristics thereof are detected in an all-around mode, the limitation of fracture detection through a single technology is effectively avoided, and therefore scientific support is provided for surrounding rock internal fracture degree division.

Description

technical field [0001] The invention provides a precise grouting repair and reinforcement method for the broken surrounding rock of a tunnel, which relates to the field of stability control of the surrounding rock of the tunnel. Background technique [0002] With the in-depth advancement of national infrastructure construction, investment in urban construction, water conservancy and hydropower, transportation and other engineering fields has increased significantly, and coal mine mining in my country has entered the deep mining stage one after another. Large-section, long and deep-buried tunnels (roadways) The complex geological structure, narrow construction site and increasing unforeseen factors have brought new challenges to ensure the safe construction and stable operation of tunnel engineering. At present, the main methods to maintain the safe construction and stability of tunnels are anchor (cable) support reinforcement methods, grouting reinforcement methods and their ...

Claims

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Application Information

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IPC IPC(8): E21D11/10G01N1/08G01N23/046G01V3/12
CPCE21D11/10G01N1/08G01N23/046G01V3/12
Inventor 肖治民刘军刘明清赵伏田欧臣郑皓文程毅张远
Owner HOHAI UNIV
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