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Subway section boulder group detection method based on combination of jogging detection and geological drilling

A technology of geological drilling and detection methods, which is applied in the direction of seismology, seismology, and measuring devices for well logging records. It can solve problems such as inability to use alone, inaccurate detection accuracy, and inaccuracies, so as to save hole layout density. , Accuracy improvement, and the effect of accurate accuracy

Inactive Publication Date: 2017-08-18
CCCC FIRST HIGHWAY XIAMEN ENG
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Problems solved by technology

But now there is a lack of systematic and in-depth research in the industry, and there is no mature detection instrument and method. The detection accuracy is often inaccurate, and there are situations where several small boulders are detected as one large boulder, because it cannot be used alone in engineering practice.

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  • Subway section boulder group detection method based on combination of jogging detection and geological drilling
  • Subway section boulder group detection method based on combination of jogging detection and geological drilling
  • Subway section boulder group detection method based on combination of jogging detection and geological drilling

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings.

[0028] Taking the tunnel construction of a subway shield method as an example, a total of 23 geological boreholes were constructed during the design and exploration stage of this section, of which 6 boreholes revealed spherical weathered bodies (solitary rocks). When the shield well is launched in the construction section, there are a large number of boulders in the formation within the depth range of the line, and the diameter of the boulders is 0.3-3.5m. Four sets of uniaxial compressive strength tests were carried out on the rock samples, and the uniaxial compressive strength values ​​were between 134.2 and 144.7 MPa. Therefore, it was determined that there were boulder groups in the interval, and boulder detection was required. The specific content of the boulder detection scheme in this embodiment as follows:

[0029] (1) Micro-moti...

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Abstract

The invention discloses a method for detecting boulder groups in subway intervals based on micro-motion detection combined with geological drilling. "The new technology of geophysical exploration obtains natural micro-motion signals, extracts surface wave signals through data processing and analysis methods, and inverts to obtain underground shear wave velocity structure to explore geological structures and determine the distribution range of boulder groups. Then the geological drilling is carried out through hole layout, and the size and spatial distribution of the boulders in the interval are obtained by drilling cores. The invention can realize the determination of the boulder group area and the size and spatial distribution position of each boulder body, and is suitable for boulder detection within the tunnel excavation range of the shield tunneling method.

Description

technical field [0001] The invention relates to a segment assembling method, and specifically designs a method for detecting boulder groups in subway intervals based on micro-motion detection combined with geological drilling. Background technique [0002] In urban rail projects, the intervals between stations are generally in the form of underground tunnels, which inevitably require construction in complex strata. Most of the existing interval tunnel construction methods use the shield method. Due to the huge difference in the strength of the boulder compared with the strength of the surrounding strata, if the boulder is suddenly encountered during the excavation of the shield, it will often cause damage to the cutter head of the shield machine and affect the shield machine. Normal construction will cause economic losses, and sometimes it will cause abnormal ground subsidence, which will affect the safety of surrounding buildings (structures) under construction. Today's ge...

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Application Information

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IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/74
Inventor 黄明峰何剑光林金华马永刚
Owner CCCC FIRST HIGHWAY XIAMEN ENG
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