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（中國(guó)中元國(guó)際工程有限公司， 北京 100089）

［摘要］柬埔寨國(guó)家體育場(chǎng)地基基礎(chǔ)設(shè)計(jì)包括運(yùn)動(dòng)場(chǎng)和場(chǎng)外地基處理及看臺(tái)、索塔和背索基礎(chǔ)設(shè)計(jì)。根據(jù)場(chǎng)地回填土現(xiàn)狀和場(chǎng)地使用的重要性不同，對(duì)運(yùn)動(dòng)場(chǎng)地地基采用2 000kN·m較小夯擊能強(qiáng)夯處理，運(yùn)動(dòng)場(chǎng)外地基采用重型機(jī)械碾壓，處理效果很好，滿足使用要求。基礎(chǔ)全部采用后注漿鉆孔灌注樁，有效解決了樁基承載力和變形問題。索塔基礎(chǔ)受力復(fù)雜，通過對(duì)不同階段(施工階段、張拉階段、使用階段)包絡(luò)設(shè)計(jì)和在索塔承臺(tái)間設(shè)置500mm厚、配非對(duì)稱預(yù)應(yīng)力筋的平衡筏板及在索塔承臺(tái)下布置不等間距群樁，使得索塔基礎(chǔ)單樁受力合理、均勻，單樁最大水平力大大降低，經(jīng)濟(jì)效益良好。背索索力較大，對(duì)背索基礎(chǔ)，采用大直徑1 000mm樁，樁頂嵌固于硬殼層粉質(zhì)黏土層中，這有效提高了單樁水平承載力。背索承臺(tái)周圍采用級(jí)配碎石注漿體加固，發(fā)揮注漿體對(duì)承臺(tái)的環(huán)箍作用。經(jīng)分析，背索基礎(chǔ)可靠度較高。

［關(guān)鍵詞］柬埔寨國(guó)家體育場(chǎng)； 地基處理； 索塔基礎(chǔ)； 背索基礎(chǔ)； 樁基水平力

中圖分類號(hào)：TU393-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

作者簡(jiǎn)介：張速，學(xué)士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: 728239747@qq.com。