杭州狭长软土基坑支护侧移规律与解析预测方法研究

In order to reduce the influence of deep narrow foundation pit construction on adjacent properties in urban area in Hangzhou, the characteristics of the support wall lateral deflection are analyzed and the corresponding analytical prediction method is proposed. The support wall lateral deflections of the deep narrow foundation pits at Wenyi West Road, Qingchun Station, Qiutao Station, Xingtang Station and Qingnian Station in Hangzhou soft clay are monitored and compared with those of deep foundation pits in Zhejiang and deep narrow foundation pits in Shanghai, Taipei and Singapore. The results show that the maximum support wall lateral deflection of the foundation pit on Wenyi West Road, 0.20%He ~0.25%He, where He is the maximum excavation depth, is close to that in Shanghai(0.15%He~0.41% He), but is smaller than those in Zhejiang, Taipei and Singapore(0.27% He~0.62% He); which is related to the high tangential modulus of Hangzhou soil and small width of the foundation pit. The support wall lateral deflection of the narrow deep foundation pits in Hangzhou can be precisely predicted based on the representative stress strain relationship at site and the modified mobilisable strength design (MMSD) method.     

Vertical bearing behavior of cast-in-place diaphragm wall in Shanghai

When diaphragm wall is used as the permanent vertical bearing structure,design standard of the bored pile adopted has to induce the risk or iste. The vertical load transfer mechanism and bearing capacity of the diaphragm wall are examined by a field testing program at the site in Shanghai soft clays. Test results indicate that the diaphragm wall almost behaves as a rigid body under the vertical load. It induces that the skin friction and the toe resistance of the wall develop simultaneously. The skin fricti...     

地铁盾构进洞整体接收装置变形验算及压力试验研究

针对当前地铁盾构进洞遇到的复杂施工环境,设计了一种新型地铁盾构进洞整体接收装置。为保证盾构进洞整体接收装置在实际盾构进洞工程施工安全,该文通过数值计算和工程现场压力试验对盾构进洞整体接收装置进行了验证研究。研究结果表明,地铁盾构进洞整体接收装置设计满足杭州地铁2号线钱江世纪城-钱江路站区间江南风井盾构进洞工程施工要求。     

超大直径泥水平衡盾构始发施工风险监控技术研究

利用盾构法施工超大直径隧道时盾构始发与到达环节是事故高发期,由此引发的工程事故屡见不鲜。为了最大程度降低盾构始发施工过程中的风险,提出盾构始发施工风险实时监控技术。该技术结合原位监测、工况实时记录、专家系统对盾构始发各关键工序进行实时监控,根据原位监测数据分析、盾构始发各工序衔接、工期等,综合评估各工序可能存在的潜在风险,可实时远程自动预警,并通过专家系统案例分析提出相应的风险解决方案。该技术在上海长江西路隧道工程中进行应用,取得比较理想的结果。