TSP203Plus在岩溶隧道地质预报中的应用及问题探讨
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摘要
目前TSP203Plus在岩溶隧道超前地质预报过程中的判释原则没有统一标准,使得预报结论不能给现场施工提供很好的指导。笔者通过使用该设备在岩溶隧道地质预报中的应用,得知若两个检波器同时出现密集反射界面,且较长段的泊松比突变增大,则认为掌子面前方存在地下水;若两个检波器同时出现密集反射界面,且动弹性杨氏模量存在突跳异常,则前方存在溶洞。由于TSP203Plus地震波法地质预报对施工现场环境要求极高,本文就现场的激发炮孔、接收炮孔在围岩较差情况下的塌孔及爆破实施时间长等问题提出两点改进建议:围岩较差时,炮孔钻制完成后,立即放入塑料PVC管进行护孔,避免了塌孔对数据采集质量的影响;雷管炸药激发地震波存在安全隐患,可以考虑其它激发震源的方法,如电火花等。
At present,there is no uniform standard for judgment and explanation principles of the TSP203 Plus in the karst tunnel geological prediction.Therefore,forecasting conclusions can not provide better guidance to the site construction.By using the equipment to do geological forecast in the karst tunnel,two conclusions can be gotten.Firstly,if the intensive reflection interface appears in the two detectors simultaneously and the Poisson's ratio of the longer segment mutation increases,there is groundwater in front face.Secondly,if the intensive reflection interface simultaneously appears in the two detectors and the dynamic elastic Young's modulus jumps anomaly,there is karst cave in front.Since TSP203 Plus seismic geological prediction method has high demand for the environment of construction site,this paper gives two recommendations to improve the problems,when the circumstance of surrounding rock of hole collapse of stimulating and receiving blasthole is relative bad and blasting time is long.First of all,with poor surrounding rock,the plastic PVC pipe is placed in the hole immediately to protect the hole after completing the blast-hole drill.This way avoids the impact of the hole collapse on the quality of data collection.Secondly,due to security risks of detonator dynamite seismic wave excitation,other excitation source should be considered,such as a spark.
At present,there is no uniform standard for judgment and explanation principles of the TSP203 Plus in the karst tunnel geological prediction.Therefore,forecasting conclusions can not provide better guidance to the site construction.By using the equipment to do geological forecast in the karst tunnel,two conclusions can be gotten.Firstly,if the intensive reflection interface appears in the two detectors simultaneously and the Poisson's ratio of the longer segment mutation increases,there is groundwater in front face.Secondly,if the intensive reflection interface simultaneously appears in the two detectors and the dynamic elastic Young's modulus jumps anomaly,there is karst cave in front.Since TSP203 Plus seismic geological prediction method has high demand for the environment of construction site,this paper gives two recommendations to improve the problems,when the circumstance of surrounding rock of hole collapse of stimulating and receiving blasthole is relative bad and blasting time is long.First of all,with poor surrounding rock,the plastic PVC pipe is placed in the hole immediately to protect the hole after completing the blast-hole drill.This way avoids the impact of the hole collapse on the quality of data collection.Secondly,due to security risks of detonator dynamite seismic wave excitation,other excitation source should be considered,such as a spark.
引文
[1]周文峰.地震反射波法(TSP)在隧道地质超前预报中的应用研究[D].成都:成都理工大学,2009.
[2]胡辉荣,于贵.TSP203Plus超前地质预报系统在高竹顶隧道断层中的应用[J].铁道工程学报,2011(5):1-3.
[3]邱道宏,李术才,张乐文,等.基于TSP203系统和GA-SVM的围岩超前分类预测[J].岩石力学与工程学报,2010,29(增1):3221-3226.
[4]罗卫华,肖书安,李德久,等.TSP系统在隧道工程施工地质预报中的应用和发展[J].中南公路工程,2006,31(1):135-137.
[5]石志龙.TSP203plus系统在茶林顶隧道开挖施工中的应用[J].佳木斯大学学报(自然科学版),2014,32(2):249-252.
[6]刘云祯.TGP206与TSP203地质预报系统优势对比分析[J].隧道建设,2014,34(3):198-204.
[7]范承余,程飞,陈松.TSP在隧道超前预报中的应用效果分析[J].工程地球物理学报,2013,10(4):455-459.
[8]顾湘生,刘坡拉.铁路岩溶工程地质勘察技术[M].武汉:中国地质大学出版社,2012.
[2]胡辉荣,于贵.TSP203Plus超前地质预报系统在高竹顶隧道断层中的应用[J].铁道工程学报,2011(5):1-3.
[3]邱道宏,李术才,张乐文,等.基于TSP203系统和GA-SVM的围岩超前分类预测[J].岩石力学与工程学报,2010,29(增1):3221-3226.
[4]罗卫华,肖书安,李德久,等.TSP系统在隧道工程施工地质预报中的应用和发展[J].中南公路工程,2006,31(1):135-137.
[5]石志龙.TSP203plus系统在茶林顶隧道开挖施工中的应用[J].佳木斯大学学报(自然科学版),2014,32(2):249-252.
[6]刘云祯.TGP206与TSP203地质预报系统优势对比分析[J].隧道建设,2014,34(3):198-204.
[7]范承余,程飞,陈松.TSP在隧道超前预报中的应用效果分析[J].工程地球物理学报,2013,10(4):455-459.
[8]顾湘生,刘坡拉.铁路岩溶工程地质勘察技术[M].武汉:中国地质大学出版社,2012.
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