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A pre-construction geological survey technology for foundation pit engineering based on tdr technology

A technology of geological survey and engineering construction, which is applied in the field of basic soil survey, basic structure engineering, construction, etc. to achieve the effect of accurate survey, convenient use and complete functions

Inactive Publication Date: 2020-11-13
INST OF DEFENSE ENG ACADEMY OF MILITARY SCI PLA CHINA
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Problems solved by technology

[0004] TDR is a remote measurement technology that analyzes reflected waves. It can grasp the status of the measured object at a remote location, which is suitable for the survey and use of foundation pit engineering before excavation. However, there is no one in the prior art that applies TDR technology to foundation pits. Therefore, it is necessary to design a geological survey process based on TDR technology before the construction of foundation pit engineering.

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  • A pre-construction geological survey technology for foundation pit engineering based on tdr technology
  • A pre-construction geological survey technology for foundation pit engineering based on tdr technology
  • A pre-construction geological survey technology for foundation pit engineering based on tdr technology

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Embodiment Construction

[0022] In order to facilitate the understanding of the technical solution of the present invention, the following in conjunction with the attached Figure 1-3 The present invention will be further explained with specific examples, and the examples are not intended to limit the protection scope of the invention.

[0023] Such as figure 1 As shown, a geological survey process before construction of foundation pit engineering based on TDR technology mainly includes the following steps:

[0024] S1: Determination of the foundation pit project site: According to the site selection and excavation requirements of the foundation pit project, conduct a preliminary survey of the site selection range, determine the excavation range, survey range, excavation depth, drilling position and depth, according to the above technical requirements, Determine the survey plan, the survey range is three times the excavation range, the drilling depth is three times the excavation depth, and the dista...

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Abstract

The invention relates to a TDR-technology-based geological survey process used before foundation pit construction. The TDR-technology-based geological survey process mainly includes the steps of S1, determining a foundation pit project site, to be more specific, preliminarily surveying a site selection range according to the site selection and excavation requirements of a foundation pit project todetermine a survey scheme; S2, using a drilling machine to perform drilling according to a drilling position, placing probes into drilled holes, and performing equipment debugging; S3, performing TDRsurvey, wherein a pulse generator transmits the same pulse signal to the probes, and when the pulse signal is transmitted to signal reflectors at the bottoms of the probes, the residual pulse signalis reflected by signal reflectors; S4, by a signal analyzer in a TDR signal detector, calculating and analyzing the signal returned by each probe; S5, making a detailed foundation pit excavation scheme according to the geological information of the excavation range.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a geological survey process before foundation pit engineering construction based on TDR technology. Background technique [0002] In order to ensure the safety and stability of the underground space formed by the excavation of the ground during the construction of the underground structure, the retaining structure, groundwater control, environmental protection and other measures are called foundation pit engineering. Foundation pit engineering is a system engineering integrating geological engineering, geotechnical engineering, structural engineering and geotechnical testing technology. Its main content: engineering survey, support structure design and construction, earthwork excavation and backfill, groundwater control, information construction and surrounding environmental protection, etc. The simplest and most economical way to construct a foundat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D1/02
CPCE02D1/02
Inventor 秦昊刘引黄牧魏丽娟李长君李春海
Owner INST OF DEFENSE ENG ACADEMY OF MILITARY SCI PLA CHINA
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