海域围堰内复杂地质条件下连续墙施工技术研究
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摘要
苏埃通道工程南岸海域围堰内地层结构复杂,上部为回填土、淤泥质土,中部为砂层,下部为强风化、中风化岩层,岩石强度高,且槽段内有大量潜在孤石。为解决该复杂地层条件下连续墙施工的技术难题,例如上部软土层易塌方,下部孤石强度高、不稳定,斜面基岩难以引孔、取芯,风化岩层中成槽机不能有效施工等,通过优化、改进施工技术,形成"槽壁预先加固、成槽机抓取软土、密集钻孔+冲锤冲击破碎孤石、旋挖钻机和成槽机钻抓配合挖除风化岩层、牙轮钻钻取斜面基岩"的施工工艺,并通过严格控制施工管理作业程序,实现平行作业,大幅提高连续墙施工效率。研究结果可为同类工程的施工提供参考。
The strata structure of sea cofferdam in south shore of Su'ai Tunnel is complex. The upper part is backfill and mucky soil,the middle part is sand layer,and the bottom part is strongly-weathered and moderately-weathered rocks with high strength,and there are a lot of potential boulders in the groove. In order to solve the technical problems of diaphragm wall construction under complex conditions,i. e. easy collapse of upper soft soil layer,unstable lower boulders with high strength,difficult borehole drilling and sampling of inclined bedrock,and low efficient trenching machine,the construction technologies are optimized and improved. And then the construction technology of " prereinforcement of groove wall,grabbing of soft soil by trenching machine,dense drilling of boulder and impact crushing by the percussion hammer,weathered rock removing by rotary drill and trenching machine,and inclined bedrock drilling by roller-bit hole rig". Finally,by strictly controlling the construction management procedures,the parallel operation can be realized and the efficiency of diaphragm wall construction can be greatly improved. The results can provide reference for similar projects in the future.
The strata structure of sea cofferdam in south shore of Su'ai Tunnel is complex. The upper part is backfill and mucky soil,the middle part is sand layer,and the bottom part is strongly-weathered and moderately-weathered rocks with high strength,and there are a lot of potential boulders in the groove. In order to solve the technical problems of diaphragm wall construction under complex conditions,i. e. easy collapse of upper soft soil layer,unstable lower boulders with high strength,difficult borehole drilling and sampling of inclined bedrock,and low efficient trenching machine,the construction technologies are optimized and improved. And then the construction technology of " prereinforcement of groove wall,grabbing of soft soil by trenching machine,dense drilling of boulder and impact crushing by the percussion hammer,weathered rock removing by rotary drill and trenching machine,and inclined bedrock drilling by roller-bit hole rig". Finally,by strictly controlling the construction management procedures,the parallel operation can be realized and the efficiency of diaphragm wall construction can be greatly improved. The results can provide reference for similar projects in the future.
引文
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[8]何聪志.狮子洋隧道地下连续墙施工技术[J].隧道建设,2010,30(增刊1):429.HE Congzhi. Diaphragm wall construction technology applied in construction of Shiziyang Tunnel[J]. Tunnel Construction,2010,30(S1):429.
[9]张瑞云,孟丽军,孙铁城.地下连续墙成槽施工工法及设备适用性分析[C]//第十二届全国结构工程学术会议论文集.重庆:中国力学学会,2003.ZHANG Ruiyun,MENG Lijun,SUN Tiecheng. Grooving construction method and equipment applicability of underground diaphragm wall[C]//Twelfth National Symposium on Structural Engineering. Chongqing:The Chinese Society of Theoretical and Applied Mechanics,2003.
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[12]张冰,胡军,王恺华.二钻一抓法在超深地下连续墙施工中的应用[J].施工技术,2006,35(11):24.ZHANG Bing,HU Jun,WANG Kaihua. Application of the two-drill one-clamshell method in extra deep diaphragm wall construction[J]. Construction Technology,2006,35(11):24.
[13]冀大禹.近海人工填筑砂石段地连墙成槽施工技术例析[J].建筑,2014(7):72.JI Dayu. Analysis of grooving technology of offshore underground diaphragm wall in sand filled section[J].Construction and Architecture,2014(7):72.
[14]马源,陈宇杰,陈玮,等.填海抛石区地下连续墙施工工艺研究[J].建筑知识,2016(8):72.MA Yuan,CHEN Yujie,CHEN Wei,et al. Research on construction technology of underground diaphragm wall in riprap area of reclamation[J]. Architecture Knowledge,2016(8):72.
[15]胡德军,王帅.复杂地层中TRD组合施工技术的应用[J].建筑,2017(6):65.HU Dejun,WANG Shuai. Application of TRD combined construction technology in complex stratum[J].Construction and Architecture,2017(6):65.
[2]刘加峰.双轮铣槽机在坚硬花岗岩地质条件下的地下连续墙施工应用[J].建筑施工,2016,38(2):193.LIU Jiafeng. Dual-wheel trench milling machine applied to underground diaphragm wall under geological condition of hard granite[J]. Building Construction,2016,38(2):193.
[3]赵煜成,杨新湘,刘武.大倾角破碎岩层葫芦形嵌岩地连墙施工关键技术研究[J].湖南交通科技,2016,42(3):120.ZHAO Yucheng,YANG Xinxiang,LIU Wu. Research on key construction technology of gourd-shaped rock-socketed underground diaphragm wall with large inclination broken rock stratum[J]. Hunan Communication Science and Technology,2016,42(3):120.
[4]周鹏华,黄晓程,朱海军,等.临江超深嵌岩地下连续墙施工技术[J].建筑施工,2015,37(4):439.ZHOU Penghua,HUANG Xiaocheng,ZHU Haijun,et al.Construction technology for super deep rock-socketed diaphragm wall close to riverside[J]. Building Construction,2015,37(4):439.
[5]颜建,宋力,庄前斌,等.三洋港枢纽工程钢筋混凝土地下连续墙施工技术[J].上海水务,2013,29(1):27.YAN Jian,SONG Li,ZHUANG Qianbing,et al. Reinforced concrete diaphragm wall construction technology of three ocean port hub project[J]. Shanghai Water,2013,29(1):27.
[6]赵康林,王光伟,李志军,等.地下入岩连续墙施工技术研究[J].隧道建设,2013,33(2):156.ZHAO Kanglin, WANG Guangwei, LI Zhijun, et al.Construction technology of diaphragm walls inserted into rocks[J]. Tunnel Construction,2013,33(2):156.
[7]白楠,尹长海,王君.不良地质条件下地下连续墙成槽施工技术[J].施工技术,2012,41(6):110.BAI Nan, YIN Changhai, WANG Jun. Construction for diaphragm wall trenching under poor geological condition[J]. Construction Technology,2012,41(6):110.
[8]何聪志.狮子洋隧道地下连续墙施工技术[J].隧道建设,2010,30(增刊1):429.HE Congzhi. Diaphragm wall construction technology applied in construction of Shiziyang Tunnel[J]. Tunnel Construction,2010,30(S1):429.
[9]张瑞云,孟丽军,孙铁城.地下连续墙成槽施工工法及设备适用性分析[C]//第十二届全国结构工程学术会议论文集.重庆:中国力学学会,2003.ZHANG Ruiyun,MENG Lijun,SUN Tiecheng. Grooving construction method and equipment applicability of underground diaphragm wall[C]//Twelfth National Symposium on Structural Engineering. Chongqing:The Chinese Society of Theoretical and Applied Mechanics,2003.
[10]苗燕玲.地下连续墙的特点及其部分施工工艺[J].今日科苑,2010(10):60.MIAO Yanling. Characteristics of underground diaphragm wall and its partial construction technology[J]. Modern Science,2010(10):60.
[11]顾琦,梁伟,王宗贤.浅析我国地下连续墙施工技术的应用[J].科技信息,2010(4):317.GU Qi,LIANG Wei,WANG Zongxian. Analysis of the application of construction technology of underground diaphragm wall in our country[J]. Scientific&Technological Information,2010(4):317.
[12]张冰,胡军,王恺华.二钻一抓法在超深地下连续墙施工中的应用[J].施工技术,2006,35(11):24.ZHANG Bing,HU Jun,WANG Kaihua. Application of the two-drill one-clamshell method in extra deep diaphragm wall construction[J]. Construction Technology,2006,35(11):24.
[13]冀大禹.近海人工填筑砂石段地连墙成槽施工技术例析[J].建筑,2014(7):72.JI Dayu. Analysis of grooving technology of offshore underground diaphragm wall in sand filled section[J].Construction and Architecture,2014(7):72.
[14]马源,陈宇杰,陈玮,等.填海抛石区地下连续墙施工工艺研究[J].建筑知识,2016(8):72.MA Yuan,CHEN Yujie,CHEN Wei,et al. Research on construction technology of underground diaphragm wall in riprap area of reclamation[J]. Architecture Knowledge,2016(8):72.
[15]胡德军,王帅.复杂地层中TRD组合施工技术的应用[J].建筑,2017(6):65.HU Dejun,WANG Shuai. Application of TRD combined construction technology in complex stratum[J].Construction and Architecture,2017(6):65.
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