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桩伴侣对高大钊教授《高层建筑桩基础的安全度与可靠性评价》一文的赘述和定性回答 薛江炜1，2，杨勇1，葛忻声1，蔡景珞1，3 (1.太原理工大学建筑工程学院，山西 太原 030024；2.太原市住房与城乡建设委员会，山西 太原； 3. 华北科技学院土木工程系，北京) 摘 要：用桩伴侣（带伴侣的桩，变刚度调平桩）“止沉”等理论对高大钊教授《高层建筑桩基础的安全度与可靠性评价》一文中对复合桩基安全度提出的问题进行了定性回答，复合桩基、变刚度调平设计等技术沿袭常规桩基础或桩筏基础的构造，虽然在一定程度上解决了精确计算沉降量的难题，但在减小用桩量的同时不可避免地对竖向承载的安全系数产生影响，使该安全系数具有了可变性和任意性，给岩土工程师带来了很大的道德风险和执业风险；地基基础的设计并非只有总的竖向承载力和筏板沉降内力两个控制因素，建议应用桩伴侣统筹考虑后期使用、水平承载和个别部位提前失效的风险。 关键词：复合桩基；安全度；可靠性；局部安全系数；桩伴侣；止沉；道德风险；执业风险；后期使用；水平承载；个别安全系数； 中图分类号：TU47 文献标识码：A 文章编号：1000–4548(2010)05–0657–07 作者简介：薛江炜(1971– )，男，河北望都人，博士研究生，高级工程师，主要从事地基处理方面特别是整合桩基础与复合地基、统筹上部结构与地基基础的桩伴侣等技术的研究与创新工作。E-mail: zhuangbanlv@163.com。 Redundancy and Qualitative Answer by Pile Partner to Pile Foundation Safety and Reliability Evaluation of High-rise Building writen by Professer Gao Dazhao XUE Jiang-wei1，2, YANG Yong1, GE Xin-sheng1, CAI Jingluo1,3 (1. College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, China; 2. Taiyuan Committee of Housing Municipal and Rural Construction,Taiyuan,China; 3. Department of Civil Engineering, North China Institute of Science and Technology, Beijing, China; ) Abstract: In this paper, answered the questions of Professer Gao Dazhao in his paper ‘Pile Foundation Safety and Reliability Evaluation of High-rise Building’ by the theory of Pile Partner; Besides the two control factors of vertical bearing capacity and raft settlement and internal force, the Later use, Lateral bearing and Individual safety coefficient are also need to be considered, and more pile partners are expected. Key words: Composite pile foundation; Safety; Reliability; Local safety coefficient; Pile partner; Stop sinking; Moral risk; Practicing risk; Later use; Lateral bearing; Individual safety coefficient 0 引 言 Fig. 1 Settlement-Load of Composite pile foundation 图2 调整受荷次序的沉降量-反力图 Fig. 2 Settlement-Load by Adjusting loading order 2 复合桩基竖向承载力安全度的评价与控制 承台（作用于地基土）与群桩中各单桩几乎同时达到极限荷载的可能性微乎其微，因此，复合桩基的整体安全系数不应当由单独承担荷载的