全风化花岗岩富水地层注浆治理研究与应用
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摘要
研究不同水压条件下疏水降压对全风化花岗岩富水地层注浆模拟加固效果的影响,分析1 MPa水压条件下土体中浆脉分布及被注试样抗压、抗崩解特性规律,并将研究结果应用于广西岑水高速均昌隧道地下工程建设中,建立基于地层密度、含水率、颗粒级配、富水区水压等信息特征的理想疏水降压判据。研究结果表明:在不同水压条件下,随着疏水降压的增大,注浆量增多,浆脉呈现由局部细小构型过渡到复杂分支-网络构型再到单一粗大或平行构型的分布特点;土体压密区试样的抗压强度及水稳特性均随着疏水降压的增大而增高,与疏水降压呈正相关关系;当疏水降压为30%时,分支-网络型浆脉对土体起到压密和骨架支撑双重挤密作用,大幅度提高压密区试样抗压强度及水稳特性的增长速率。
The influences of hydrophobic pressure drop on the simulation reinforcement effect of water-rich strata of fully weathered granite under different water pressure conditions were studied. The distribution of the slurry veins, the compressive and anti-disintegration characteristics of the grouted samples were analyzed under water pressure of 1 MPa.Furthermore, the results were applied to Junchang tunnel of Censhui expressway in Guangxi, and the criterion of ideal hydrophobic depressurization based on stratum density, water content, grain grading and water pressure in rich water areas was established. The results show that, under different water pressures, the amount of grouting increases with the increase of hydrophobic depressurization. The slurry veins transform from local small configuration to complex branch-network configuration to single bulky or parallel configuration. The compressive strength and the water stability characteristics of the sample in the compacted area of the soil increase with the increase of the hydrophobic depressurization, which is positively correlated with the hydrophobic depressurization. When the hydrophobic depressurization is 30%, branch-network slurry veins have soil pressure and skeleton support double compaction effect on soil, the compressive strength and water stability properties of pressure area sample improve greatly.
The influences of hydrophobic pressure drop on the simulation reinforcement effect of water-rich strata of fully weathered granite under different water pressure conditions were studied. The distribution of the slurry veins, the compressive and anti-disintegration characteristics of the grouted samples were analyzed under water pressure of 1 MPa.Furthermore, the results were applied to Junchang tunnel of Censhui expressway in Guangxi, and the criterion of ideal hydrophobic depressurization based on stratum density, water content, grain grading and water pressure in rich water areas was established. The results show that, under different water pressures, the amount of grouting increases with the increase of hydrophobic depressurization. The slurry veins transform from local small configuration to complex branch-network configuration to single bulky or parallel configuration. The compressive strength and the water stability characteristics of the sample in the compacted area of the soil increase with the increase of the hydrophobic depressurization, which is positively correlated with the hydrophobic depressurization. When the hydrophobic depressurization is 30%, branch-network slurry veins have soil pressure and skeleton support double compaction effect on soil, the compressive strength and water stability properties of pressure area sample improve greatly.
引文
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[19]王文峰,韩雪,黄晓诚,等.花岗岩残积土地层矿山法隧道开挖采用前进式注浆施工技术[J].轻工科技,2017(7):99-100.WANG Weifeng,HAN Xue,HUANG Xiaocheng,et al.The construction technique of forward grouting is adopted for the excavation of the land mine[J].Light Industry Science and Technology,2017(7):99-100.
[20]张伟杰,李术才,魏久传,等.三维注浆模型试验系统研制及应用[J].岩土力学,2016,37(3):902-911.ZHANG Weijie,LI Shucai,WEI Jiuchuan,et al.Development of a 3D grouting model test system and its application[J].Chinese Journal of Rock and Soil Mechanics,2016,37(3):902-911.
[21]李召峰,李术才,张庆松,等.富水破碎岩体注浆加固模拟试验及应用研究[J].岩土工程学报,2016,38(12):2247-2253.LI Zhaofeng,LI Shucai,ZHANG Qingsong,et al.Model tests on grouting reinforcement of water-rich broken rock mass[J].Chinese Journal of Geotechnical Engineering,2016,38(12):2247-2253.
[2]李建新,陈秋南,赵柳,等.南岳地区全风化花岗岩崩解特性试验研究[J].湖南科技大学学报(自然科学版),2015,30(4):59-63.LI Jianxin,CHEN Qiunan,ZHAO Liu,et al.Experimental research on disintegration characteristics of weathered granite in Nanyue[J].Journal of Hunan University of Science&Technology(Natural Science Edition),2015,30(4):59-63.
[3]张素敏,朱永全,高炎,等.全风化花岗岩流变特性试验研究[J].地下空间与工程学报,2016,12(4):904-911.ZHANG Sumin,ZHU Yongquan,GAO Yan,et al.Experimental investigation on rheological properties of completely weathered granite[J].Chinese Journal of Underground Space and Engineering,2016,12(4):904-911.
[4]张华宾,陈帅,张顷顷,等.风化花岗岩单轴损伤力学特性试验研究[J].水利与建筑工程学报,2017,15(1):67-70.ZHANG Huabin,CHEN Shuai,ZHANG Qingqing,et al.Experimental study on damage mechanical properties of weathered granite[J].Journal of Water Resources and Architectural Engineering,2017,15(1):67-70.
[5]刘润,闫玥,闫澍旺,等.浅层压力注浆法加固风化岩质边坡及加固效果分析[J].天津大学学报(自然科学与工程技术版),2006,39(5):532-536.LIU Run,YAN Yue,YAN Shuwang,et al.Effective analysis on applying grouting method to stabilize weathered rock slope[J].Journal of Tianjin University(Science and Technology),2006,39(5):532-536.
[6]高健,张义同.实施超前注浆管棚支护的隧道开挖面稳定分析[J].天津大学学报(自然科学与工程技术版),2009,42(8):666-672.GAO Jian,ZHANG Yitong.Stability analysis of tunnel face reinforced with advanced pipe grouting[J].Journal of Tianjin University(Science and Technology),2009,42(8):666-672.
[7]李术才,张霄,张庆松,等.地下工程涌突水注浆止水浆液扩散机制与封堵方法研究[J].岩石力学与工程学报,2011,30(12):2377-2396.LI Shucai,ZHANG Xiao,ZHANG Qingsong,et al.Research on mechanism of grout diffusion of dynamic grouting and plugging method in water inrush of under-ground engineering[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(12):2377-2396.
[8]胡文涛.厦门海底隧道风化深槽全断面帷幕注浆方案设计[J].石家庄铁道学院学报,2007,20(2):130-134.HU Wentao.Full-face curtain grouting for the weathered ditch in the construction of sea tunnel in Xiamen[J].Journal of Shijiazhuang Railway Institute,2007,20(2):130-134.
[9]MASUMOTO K,SUGITA Y,FUJITA T,et al.A clay grouting technique for granitic rock adjacent to clay bulkhead[J].Physics and Chemistry of the Earth,2006,32:691-700.
[10]YUN J W,PARK J J,KWON Y S,et al.Cement-based fracture grouting phenomenon of weathered granite soil[J].Geotechnical Engineering,2017,21(1):232-242.
[11]王凯,李术才,杨磊,等.全风化花岗岩加固特性注浆模拟试验[J].天津大学学报(自然科学与工程技术版),2017,50(10):1-12.WANG Kai,LI Shucai,YANG Lei,et al.Grouting simulation experiment on reinforcement characteristics of completely weathered granite[J].Journal of Tianjin University(Science and Technology),2017,50(10):1-12.
[12]崔红琴.超浅埋富水全风化花岗岩大断面隧道施工技术[J].铁道建筑技术,2014(3):1-5.CUI Hongqin.Construction technology of ultra shallow water rich fully weathered granite and large section tunnel[J].Railway Construction Technology,2014(3):1-5.
[13]李蓉,李治国.海底隧道全强风化花岗岩地层注浆技术研究[J].现代隧道技术,2008,45(1):21-29.LI Rong,LI Zhiguo.Study on the grouting technology adopted in strong-weathered granite for an under-sea tunnel[J].Modern Tunnelling Technology,2008,45(1):21-29.
[14]张顶立,孙锋,李鹏飞.海底隧道复合注浆机制研究及工程应用[J].岩石力学与工程学报,2012,31(3):445-452.ZHANG Dingli,SUN Feng,LI Pengfei.Mechanism of composite grouting subsea tunnel and its application[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(3):445-452.
[15]袁敬强,陈卫忠,黄世武,等.全风化花岗岩注浆加固特性试验研究[J].岩石力学与工程学报,2016,35(增1):2876-2882.YUAN Jingqiang,CHEN Weizhong,HUANG Shiwu,et al.Experimental study on physico-mechanical properties of grouted completely weathered granite[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(suppl.1):2876-2882.
[16]刘金泉,陈卫忠,袁敬强.全风化花岗岩注浆加固体抗冲刷特性试验研究[J].岩土力学与工程学报,2016,35(9):1767-1775.LIU Jinquan,CHEN Weizhong,YUAN Jingqiang.Test on anti-scouring property of grouting reinforced body in completely weathered granite[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(9):1767-1775.
[17]张忠苗,邹健,贺静漪,等.黏土中压密注浆及劈裂注浆室内模拟试验分析[J].岩土工程学报,2009,31(12):1818-1824.ZHANG Zhongmiao,ZOU Jian,HE Jingyi,et al.Laboratory tests on compaction grouting and fracture grouting of clay[J].Chinese Journal of Geotechnical Engineering,2009,31(12):1818-1824.
[18]张庆松,李鹏,张霄,等.隧道断层泥注浆加固机制模型试验研究[J].岩石力学与工程学报,2015,34(5):924-934.ZHANG Qingsong,LI Peng,ZHANG Xiao,et al.Model test of grouting strengthening mechanism for fault gouge of tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(5):924-934.
[19]王文峰,韩雪,黄晓诚,等.花岗岩残积土地层矿山法隧道开挖采用前进式注浆施工技术[J].轻工科技,2017(7):99-100.WANG Weifeng,HAN Xue,HUANG Xiaocheng,et al.The construction technique of forward grouting is adopted for the excavation of the land mine[J].Light Industry Science and Technology,2017(7):99-100.
[20]张伟杰,李术才,魏久传,等.三维注浆模型试验系统研制及应用[J].岩土力学,2016,37(3):902-911.ZHANG Weijie,LI Shucai,WEI Jiuchuan,et al.Development of a 3D grouting model test system and its application[J].Chinese Journal of Rock and Soil Mechanics,2016,37(3):902-911.
[21]李召峰,李术才,张庆松,等.富水破碎岩体注浆加固模拟试验及应用研究[J].岩土工程学报,2016,38(12):2247-2253.LI Zhaofeng,LI Shucai,ZHANG Qingsong,et al.Model tests on grouting reinforcement of water-rich broken rock mass[J].Chinese Journal of Geotechnical Engineering,2016,38(12):2247-2253.
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