复杂地质环境控制的基坑围护设计方案比选*
田忠喜1赵增辉2代春泉3刚申学4
Comparison and Selection of Foundation Pit Enclosure Design under Complex Geological and Environmental Control
TIAN ZhongxiZHAO ZenghuiDAI ChunquanGANG Shenxue
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作者信息:1.聊城大学建筑工程学院，252000，聊城；
2.山东科技大学矿业与安全工程学院，266590，青岛；
3.山东科技大学土木工程与建筑学院，266590，青岛；
4.山东易方达项目管理有限公司，250101，济南
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Affiliation:School of Architecture Engineering, Liaocheng University, 252000, Liaocheng, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2020.09.035
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中图分类号/CLCN:TU94+3.1
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栏目/Col:应用技术
摘要:
泉域复杂地质环境的地铁基坑围护设计方案应以控制水资源为主。依托济南市轨道交通R2线一期宝华街站工程，详细分析工程水文地质与周边环境风险，剖析常用围护设计的特性和适用性。针对该站特定地质环境，提出4种不同的围护设计方案，基于灰色关联理论分别从设备选型、截水效果、环境影响、施工工期、工程造价5方面优选确定了钻孔桩+高喷桩围护设计方案。鉴于该工法在全强风化岩层适用性差的特点，提出了2种高喷桩现场试验方案，并通过钻孔取芯、注水试验、基坑开挖验证了优选方案的合理性。
Abstracts:
The groundwater control for metro foundation pit enclosure structure has the priority in the complex geological environment of the spring area. Taking the Baohua Street Station of Jinan rail transit R2 Line phase I as an example, the engineering hydrogeology and surrounding environmental risks of the project are analyzed in detail, the characteristics and applicability of common enclosure designs are analyzed. According to the specific geological environment of the station, four different enclosure design schemes are proposed. Based on gray correlation theory, the bored pile+height scheme is selected and optimized from the aspects of equipment selection, water interception effect, environmental impact, construction period and project cost. In view of the poor applicability of the scheme in highly weathered rock formations, two high-injection pile field test schemes are proposed, their rationality is verified by drilling core, water-injection test and foundation pit excavation construction.
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