地铁施工扰动区探测及注浆效果评价
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摘要
地铁施工引起土体疏松、松散和空洞,进而影响地铁运营和地铁周边建筑物的安全。为探索地铁施工扰动区探测及注浆效果评价的有效手段,介绍了SSP技术的原理和特点,并结合SSP技术在北京地铁14号线甜水园中街区段的应用实例,说明了该技术在地铁施工引起的土体扰动探测及注浆效果评价中的应用效果。结果表明:注浆区在SSP的波速图像中表现为高速异常,扰动区表现为低速异常,根据SSP波速图像中高、低波速异常的分布可判定注浆区与地铁施工扰动区的位置与形态。该技术还具有抗干扰能力强、探测深度大和分辨率高等特点,是城市地铁施工与环境影响探测与评价的有效手段。
Zones disturbed by Metro construction may affect the safety of Metro operation and surrounding buildings. In the paper,the principle and characteristics of SSP seismic scattering technology are presented,so as to find an effective method to explore the zones disturbed by Metro construction and to estimate the effect of grouting reinforcement. The application of SSP technology in Tianshuiyuan Middle Street Section of Line 14 of Beijing Metro is illustrated,which verifies the effectiveness of SSP technology in the exploration of zones disturbed by Metro construction and in the estimation of the effect of grouting reinforcement. Conclusions drawn are as follows: 1) The grouting zones in the SSP image take the form of high velocity anomalies,while the disturbed zones in the SSP image take the form of low velocity anomalies; 2) The locations and patterns of the disturbed zones and grouting reinforcement zones can be determined on basis of the distribution of the high velocity anomalies and low velocity anomalies in the SSP image; 3) SSP technology,which has such advantages as strong interference resistance,deep exploration depth and high resolution,is suitable for exploring disturbed zones and estimating grouting reinforcing effect.
Zones disturbed by Metro construction may affect the safety of Metro operation and surrounding buildings. In the paper,the principle and characteristics of SSP seismic scattering technology are presented,so as to find an effective method to explore the zones disturbed by Metro construction and to estimate the effect of grouting reinforcement. The application of SSP technology in Tianshuiyuan Middle Street Section of Line 14 of Beijing Metro is illustrated,which verifies the effectiveness of SSP technology in the exploration of zones disturbed by Metro construction and in the estimation of the effect of grouting reinforcement. Conclusions drawn are as follows: 1) The grouting zones in the SSP image take the form of high velocity anomalies,while the disturbed zones in the SSP image take the form of low velocity anomalies; 2) The locations and patterns of the disturbed zones and grouting reinforcement zones can be determined on basis of the distribution of the high velocity anomalies and low velocity anomalies in the SSP image; 3) SSP technology,which has such advantages as strong interference resistance,deep exploration depth and high resolution,is suitable for exploring disturbed zones and estimating grouting reinforcing effect.
引文
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[2]闫鑫,叶阳升,张梅,等.地铁隧道下穿既有铁路桥施工影响分析[J].铁道建筑,2012(6):84-85.(YAN Xin,YE Yangsheng,ZHANG Mei,et al.Analysis on influence of construction of Metro tunnel crossing underneath existing railway bridge[J].Railway Engineering,2012(6):84-85.(in Chinese))
[3]吕波.地铁工程地层预加固技术综合分析[J].施工技术,2012,41(S1):68-71.(LV Bo.Comprehensive analysis on stratum pre-reinforcement techniques for subway engineering[J].Construction Techniques,2012,41(S1):68-71.(in Chinese))
[4]林尤聪,黄伟义,葛如冰,等.透地雷达检测路面脱空与灌浆加固的应用效果[J].物探与化探,2001,25(3):231-235.(LIN Youcong,HUANG Weiyi,GE Rubing,et al.The effects of applying ground-penetrating radar to detecting road surface vacancy and conducting grouting strengthening and consolidation[J].Geophysical and Geochemical Exploration,2001,25(3):231-235.(in Chinese))
[5]王雯珊,向开阳,熊潮波.地质雷达在路面脱空检测中的应用[J].重庆交通大学学报:自然科学版,2012,31(4):811-814.(WANG Wenshan,XIANG Kaiyang,XIONG Chaobo.Application of ground penetrating radar on detecting voids of pavement[J].Journal of Chongqing Jiaotong University:Natural Science,2012,31(4):811-814.(in Chinese))
[6]王德咏,罗先启,李宏阶.探地雷达在顶管施工中的应用[J].勘察科学技术,2009(2):62-64.(WANG Deyong,LUO Xianqi,LI Hongjie.Application of GPR to detection of jacking pipe construction[J].Site Investigation Science and Technology,2009(2):62-64.(in Chinese))
[7]潘瑞林.采空区物探方法新探[J].铁道勘察,2010(6):23-26.(PAN Ruilin.New approaches of geophysical exploration for mining zone[J].Railway Investigation and Surveying,2010(6):23-26.(in Chinese))
[8]李斌,石大为.SSP技术在采空区探查中的应用[J].煤矿安全,2012,43(9):155-158.(LI Bin,SHI Dawei.The application of SSP technology in gob exploration[J].Safety in Coal Mines,2012,43(9):155-158.(in Chinese))
[9]虞立,王国群,袁忠明,等.散射波地震勘探技术在浅表层精细结构勘查中的应用研究[J].石油物探,2013,52(1):43-48.(YU Li,WANG Guoqun,YUAN Zhongming,et al.Application of seismic scattering profile technique in the shallow fine exploration[J].Geophysical Prospecting for Petroleum,2013,52(1):43-48.(in Chinese))
[10]董敏煜.地震勘探[M].东营:石油大学出版社,2000:22-26.(DONG Minyu.Seismic prospecting[M].Dongying:China University of Petroleum Publishing House,2000:22-26.(in Chinese))
[11]李远钦,杜友福.双曲Radon变换及其在地震资料处理中的应用[J].江汉石油学院学报,1990,12(2):16-20.(LI Yuanqin,DU Youfu.Transform of hyperbolic Radon and it’s application in sersmic signal processing[J].Journal of Jianghan Petroleum Institute,1990,12(2):16-20.(in Chinese))
[12]王梦恕.中国盾构和掘进机隧道技术现状、存在的问题及发展思路[J].隧道建设,2014,34(3):179-187.(WANG Mengshu.Tunneling by TBM/shield in China:State-of-art,problems an proposals[J].Tunnel Construction,2014,34(3):179-187.(in Chinese))
[13]张成平,张项立.城市隧道施工诱发的地面塌陷灾变机制及其控制[J].岩土力学,2010,31(S1):303-309.(ZHANG Chengping,ZHANG Dingli.Catastrophe mechanism and control technology of ground collapse induced by urban tunneling[J].Rock and Soil Mechanics,2010,31(S1):303-309.(in Chinese))
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