井间超高密度电法探测基桩的模拟及应用

doi:10.11720/wtyht.2022.1580

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摘要

为了提高基桩检测水平,减少重大安全隐患,基于2.5维井间超高密度电阻率的正反演数值模拟,构建了单桩、长短桩和群桩3种地电模型,分析其响应特征及规律;鉴于基桩检测环境的复杂性,结合两则基桩埋深探测的实例,进一步阐述了该方法的应用特点和效果。研究结果表明:井间超高密度电阻率成像技术应用于桩埋深检测,具有精度高、施工灵活方便等优点,可以大规模检测基桩的长度,而不需要1个检测孔对应1根基桩,极大提高了基桩埋深的探测水平。

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	柴伦炜

关键词 ：井间超高密度电阻率成像, 基桩, 桩埋深, 数值模拟

Abstract：

To improve the detection level of foundation piles and reduce major potential safety hazards, this study established three geoelectric models corresponding to a single pile, long-short piles, and a pile group through the 2.5D forward and inverse numerical simulations using the cross-well ultra-high-density resistivity imaging technology and analyzed the response characteristics and regularity of these models. Given the complex detection environment of foundation piles, this study further expounded the application characteristics and effects of the technology by combining two cases for the detection of the burial depths of piles. The results are as follows. The cross-well ultra-high-density resistivity imaging technology enjoys the advantages of high precision and flexible and convenient construction when being applied to the detection of pile buried depth. It can detect the lengths of foundation piles on a large scale rather than detecting one foundation pile using one detection hole, thus greatly improving the detection level of the burial depths of foundation piles.

Key words： cross-well ultra-high-density resistivity imaging pile foundation pile buried depth numerical simulation

收稿日期: 2021-10-25 修回日期: 2022-04-26 出版日期: 2022-10-20

ZTFLH:	P631.1
	U452

基金资助:中铁第一勘察设计院集团有限公司科研项目(院科16-16)

作者简介: 柴伦炜(1990-),男,硕士,工程师,毕业于吉林大学地球探测与信息技术专业,注册土木工程师(岩土),注册一级建造师(市政),主要从事岩土工程勘察与设计研究工作。Email:chailw2309@126.com

引用本文:

柴伦炜. 井间超高密度电法探测基桩的模拟及应用[J]. 物探与化探, 2022, 46(5): 1283-1288.
CHAI Lun-Wei. A simulation and application of cross-well ultra-high-density resistivity imaging in the detection of foundation piles. Geophysical and Geochemical Exploration, 2022, 46(5): 1283-1288.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2022.1580 或 https://www.wutanyuhuatan.com/CN/Y2022/V46/I5/1283

Fig.1 基桩模拟研究成果

Fig.2 场地1低应变测桩成果

Fig.3 场地1井间超高密度电阻率反演成果

Fig.4 场地2井间超高密度电阻率检测孔平面位置示意

Fig.5 井间超高密度电阻率反演成果

Table 1 检测孔之间的基桩埋藏深度

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