某深基坑工程综合支护技术.pdf

施工技术 2012年1月上 32 CONSTRUCTION TECHNOLOGY 第41卷第356期 某深基坑工程综合支护技术 梁德初 (广西建工集团第三建筑工程有限责任公司，广西柳州545002) [摘要]某工程基坑开挖施工中，在基坑的不同位置分别采用了机械冲孔桩板墙预应力锚索、锚杆挂网喷锚 错索和高压旋喷桩止水帷幕墙钢管桩的支护方法，介绍了施工过程中边坡局部自稳能力不足、基坑突涌情况 的应急措施.监测结果显示，基坑支护结构处于稳定状态，有效地解决了临江深基坑边坡的止水难题，确保了基坑 边坡的安全稳定和正常施工. [关键词]地下工程；深基坑；支护；机械冲孔桩；预应力锚索；高压旋喷桩 [中图分类号]TU753 [文献标识码]A[文章编号]1002-8498(2012)01-0032-04 Comprehensive Bracing Techniques of Some Deep Foundation Excavation Project Liang Dechu Guangxi Construction Engineering Group the Third Construction Engineering Company Liuzhou Guangxi 545002 China) Abstract:In excavation construction of some project bracing techniques are adopted in different part such as technology of mechanical punched pile plate wall and prestressed anchor cable anchor anchoring shoterete with wire mesh and anchor cable as well as technology of high pressure jet grouting pile waterproofing curtain and steel pipe pile.Furthermore the author introduces emergency measures for lack of slope self-stability and water-inrushing.Monitoring results show that supporting structure is on stable state the problem of water seal is solved which makes slope stable. Key words:underground;deep foundation excavation;supports;mechanical punched piles;prestressed anchor cable;high pressure jet grouting piles 1工程概况 7层，场区岩土层自上而下分为：①杂填土；②素填 本工程位于柳州市柳江河堤北侧，拟建工程共 土（混凝土）；③表层粉质黏土；④硬塑状粉质黏土； 2栋高层住宅，桩基础，地下2层，地上321层和 ⑤含圆砾卵石黏土层；⑥可塑状粉质黏土；⑦基岩. 281层.工程±0.000m绝对标高为89.55m 原 场地内存在地下孔隙-裂隙水，埋深为2.1~ 地面为西、北部高，绝对标高在89.0m左右，临江的 11.4m 标高为77.03~79.99...