施工技术 2017年1月上 32 CONSTRUCTION TECHNOLOGY 第46卷第1期 D0I:10.7672/8gj82017010032 预应力管桩复合支护结构在软土超大深基坑工程中 的设计与监测研究* 宋永生,杨博2,卫龙武2,郭彤3,陈永战4,卫海2 (1.金陵科技学院建筑工程学院,江苏南京211169;2.江苏海基节能新技术股份有限公司,汇苏南京210019; 3.东南大学土木工程学院,江苏南京210096;4.南京市城市建设投资控股(集团) 有限责任公司,江苏南京210018) [摘要]以某软土超大深基坑示范工程为背景,介绍了预应力管桩复合支护结构在软土超大深基坑工程中的应用 情况.结合结构计算、试验研究和监测分析,获取了预应力管桩对该类基坑工程的适用性特征.结果表明,对于临 时性支护结构,应当结合模型试验结果对规范推荐的设计强度进行修正,以满足实际工程需要:在较大水土压力作 用下,管桩表现出较好的柔性和较大的裂后强度储备空间,具备较好的适用性;应结合管桩的裂后刚度退化特性开 展基坑支护结构的变形设计. [关键词]深基坑;支护;桩;预应力管桩:设计;监测 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2017)01-0032-04 Design and Monitoring Investigation on Prestress Concrete Cube-pile Cement-mixed Wall for Soft Soil Deep Foundation Excavation Engineering Song Yongsheng' Yang Bo2 Wei Longwu? Guo Tong' Chen Yongzhan' Wei Hai2 (1.School of Architectural Engineering Jinling Institute of Technology Nanjing Jiangsu 211169 China;2.Jiangsu Hongji Energy-saving New Technology Company Nanjing Jiangsu 210019 China;3.School of Civil Engineering Southeast University Nanjing Jiangsu 210096 China:4.Nanjing Urban Construction Investment Holding Group)Co.Ltd.Nanjing Jiangsu 210018 China) Abstract:Taking a soft soil deep foundation excavation as an example the application situation is presented for PCMW.Mechanic calculation static-load experiment and monitoring analysis are conducted to obtain the adaption property for such kind of foundation excavation engineering projects. The consequence indicates that code-remended design strength for prestress concrete cube...
预应力管桩复合支护结构在软土超大深基坑工程中的设计与监测研究.pdf
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