风化岩层盾构隧道管片壁后密实度检测
赵小辉
Segment Backwall Compactness Detection for Shield Tunnel in Weathering Rock Stratum
ZHAO Xiaohui
-
作者信息:杭州市地铁集团有限责任公司， 310019， 杭州
-
Affiliation:Hangzhou Metro Group Co., Ltd., 310019, Hangzhou, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2023.07.021
-
中图分类号/CLCN:U455.43;U455.49
-
栏目/Col:研究报告
摘要:
目的：以杭州至临安城际铁路（即杭州地铁16号线）工程为例，介绍了轨道交通工程建设中，风化岩层盾构隧道管片壁后密实度检测探索与实践。分析在弱风化、中风化和强风化岩层地质的盾构隧道管片壁后密实度检测情况，为隧道壁后补浆及运营变形评估提供依据。方法：通过对打音检测法、超声成像法和地质雷达检测法分别进行现场试验，综合参考检测成果可靠性、工作效率和检测成本等，经比选确定采用地质雷达检测手段。结果及结论：通过试验对比，采用地质雷达检测法，对杭州地铁16号线的盾构隧道和矿山法隧道进行全线检测，检测结果与拆卸管片后暴露出的实际注浆密实情况的对比校核说明,二者一致性较好，未发现较大范围或严重的注浆不密实或脱空现象。风化岩层盾构隧道管片壁后密实度检测方法试验取得了预期的效果，达到预期目的。
Abstracts:
Objective: Taking the Hangzhou to Lin’an Intercity Railway project (Hangzhou Metro Line 16) as an example, the exploration and practice of the compactness detection behind the shield tunnel segment wall in weathering rock stratum during rail transit project construction is introduced. The segment backwall compactness detection for shield tunnel in weak weathering, medium weathering, and strong weathering geological strata is analyzed to provide a basis for tunnel backwall grouting and operational deformation assessment. Method: Onsite testing is carried out using the tapping detection method, ultrasonic imaging method, and geological radar detection method, and the geological radar detection method is determined through comparative selection based on the comprehensive reference of detection result reliability, work efficiency, and detection cost. Result & Conclusion: Through experimental comparison, the geological radar detection method is adopted to conduct a fullline inspection of the shield tunnel and mining method tunnel of Hangzhou Metro Line 16. The comparison and verification of the detected results with the actual grouting compactness behind the dismantled segment wall shows that there is good consistency between the detected and actual conditions, and no significantly spatial or serious grouting noncompactness or voids are found. The segment backwall compactness detection method for shield tunnel in weathering rock stratum achieves the expected results and meets the expected objectives.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 5G公专网支撑城市轨道交通“绿智融合”发展
过刊浏览
资料下载
友情链接