长春万达广场抗浮锚杆的设计与试验研究
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摘要
以长春万达广场地下室抗浮锚索工程为例,研究了扩体拉力型锚杆支护在宏观上和微观上的力学作用机理、扩体型锚固体的设计计算、所采用的锚杆扩体部分的扩孔器的内部结构等。在实验结果基础上,得出在土层中采用扩体型锚杆不仅能充分利用土体自身的强度,提高其承载力,改变其锚固体的应力状态,而且能减少锚杆锚固体长度、缩短施工工期、降低工程成本、节约自然资源等结论。最后对扩体型锚索影响承载力的因素、地层适用条件以及它的应用前景进行了探讨和展望。
Taking the Wanda Plaza Changchun basement cable anchor engineering as an example,studied underreamed tensile-type anchor supporting mechanical effect mechanism macroscopically and microscopically,design and computation of underreamed anchored body,internal structure of underreamer used in the anchor underreamed sector etc.Based on experimental results,conclusions of using underreamed anchor in soil strata not only can use own strength of soil mass to improve its bearing capacity,change anchored body stress state;but also can reduce anchor and anchored body lengths,shorten construction period,lower down project cost and save natural resources etc.have been worked out.Finally discussed and looked forward underreamed cable anchor bearing capacity impacting factors,applicable conditions of strata and application prospect.
Taking the Wanda Plaza Changchun basement cable anchor engineering as an example,studied underreamed tensile-type anchor supporting mechanical effect mechanism macroscopically and microscopically,design and computation of underreamed anchored body,internal structure of underreamer used in the anchor underreamed sector etc.Based on experimental results,conclusions of using underreamed anchor in soil strata not only can use own strength of soil mass to improve its bearing capacity,change anchored body stress state;but also can reduce anchor and anchored body lengths,shorten construction period,lower down project cost and save natural resources etc.have been worked out.Finally discussed and looked forward underreamed cable anchor bearing capacity impacting factors,applicable conditions of strata and application prospect.
引文
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[2]程良奎,李象范.岩土锚固.土钉.喷射混凝土-原理、设计与应用[M].北京:中国建筑工业出版社,2008.
[3]李象范,肖昭然.岩土工程中的锚固技术[M].北京:地震出版社,1991.
[4]李铀,白世伟,方昭茹,等.预应力锚索锚固体破坏与锚固力传递模式研究[J].湖北武汉:岩土力学,2010,24(5):686-690.
[5]温进涛,朱维申,李术才.锚索对结构面的锚固抗剪效应研究[J].岩石力学与工程学报,2003,22(10):1699-1703.
[6]顾金才,明治清,等.预应力锚索内锚固段受力特点现场试验研究[J].岩石力学与工程学报,1998,17(增):788-792.
[7]龚晓楠.地基处理手册[M].北京:中国建筑工业出版社,2008.
[8]何思明.预应力锚索作用机理研究[D].四川成都:西南交通大学,2004.
[9]中国工程建设标准化协会标准.CECS22岩土锚杆(索)技术规程[J].北京:中国计划出版社,2005.
[10]中华人民共和国国家标准.GB50007-2002建筑地基基础设计规范[J].北京:中国建筑工业出版社,2002.
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