（中国中元国际工程有限公司， 北京 100089）

［摘要］柬埔寨国家体育场地基基础设计包括运动场和场外地基处理及看台、索塔和背索基础设计。根据场地回填土现状和场地使用的重要性不同，对运动场地地基采用2 000kN·m较小夯击能强夯处理，运动场外地基采用重型机械碾压，处理效果很好，满足使用要求。基础全部采用后注浆钻孔灌注桩，有效解决了桩基承载力和变形问题。索塔基础受力复杂，通过对不同阶段(施工阶段、张拉阶段、使用阶段)包络设计和在索塔承台间设置500mm厚、配非对称预应力筋的平衡筏板及在索塔承台下布置不等间距群桩，使得索塔基础单桩受力合理、均匀，单桩最大水平力大大降低，经济效益良好。背索索力较大，对背索基础，采用大直径1 000mm桩，桩顶嵌固于硬壳层粉质黏土层中，这有效提高了单桩水平承载力。背索承台周围采用级配碎石注浆体加固，发挥注浆体对承台的环箍作用。经分析，背索基础可靠度较高。

［关键词］柬埔寨国家体育场； 地基处理； 索塔基础； 背索基础； 桩基水平力

中图分类号：TU393-3文献标识码：A文章编号：1002-848X(2020)01-0031-07

Foundation design of Morodok Techo National Stadium in the Kingdom of Cambodia

Zhang Su, Wang Jitao, Zhang Yong, Geng Shuai, Zhang Tongyi, Meng Yongjie

(China IPPR International Engineering Co., Ltd.， Beijing 100089， China)

Abstract:The foundation design of Morodok Techo National Stadium in the Kingdom of Cambodia includes the ground treatment for the sports field and the space around the stadium, as well as the foundation design of the stand, the cable towers and the backstays. According to the different characteristics of the status quo of the site backfill and the importance of the site use, small ramming energy of 2 000kN·m was used for the dynamic compaction on the foundation of the sports field, and heavy machinery rolling was used for the foundation outside the sports ground. The treatment effects met the use requirements very well. The foundation adopted post grouting bored pile, which solved the bearing capacity and deformation problems of the pile foundation. The stress of the foundation of the cable tower was complex. Envelope design was conducted in different stages of construction, tension and use. A 500mm thick balanced raft with asymmetrical prestressed reinforcement was set between the pile caps of the cable tower and groups of piles with unequal spacing were set under the pile caps of the cable tower, which make the single pile of the foundation of the cable tower reasonable and uniform. In addition, the maximum horizontal force of single pile was greatly reduced and the economic benefit was good. The cable force of the backstay is large capacity. For the backstay foundation, large diameter 1 000mm vertical piles were used and the pile top was embedded in the silty clay layer of hard shell layer, which improve the horizontal bearing capacity of single pile. Graded crushed stone grouting body was used around the backstay cap to play the role of grouting body in the bearing platform hoop. The reliability of the backstay foundation was high by analysis.

Keywords:Morodok Techo National Stadium in the Kingdom of Cambodia;  ground treatment; cable tower foundation; backstay foundation; horizontal forces of pile foundation

作者简介：张速，学士，高级工程师，一级注册结构工程师，Email: 728239747@qq.com。