884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

（1 浙江大學(xué)軟弱土與環(huán)境土工教育部重點(diǎn)實(shí)驗(yàn)室， 杭州 310058；2 浙江大學(xué)巖土工程研究所， 杭州 310058；   3 重慶交通大學(xué)河海學(xué)院， 重慶 400074； 4 河海大學(xué)港口海岸與近海工程學(xué)院， 南京 210098）

［摘要］重慶地區(qū)某擬建高層建筑地基土不均勻，主樓與裙房之間高度相差懸殊，傳統(tǒng)樁基設(shè)計(jì)理念是采用端承嵌巖樁，但這易造成建筑產(chǎn)生超出規(guī)范限定的蝶形差異沉降，引起結(jié)構(gòu)產(chǎn)生較大的次生應(yīng)力。基于巖土體自身承載力以及地基土的性質(zhì)來優(yōu)化布樁方案，在基巖埋深較大的區(qū)域采用摩擦樁；  在基巖埋深淺的區(qū)域采用嵌巖樁。通過現(xiàn)場(chǎng)靜載荷試驗(yàn)對(duì)樁基設(shè)計(jì)進(jìn)行了驗(yàn)證。結(jié)果表明：調(diào)整樁基設(shè)計(jì)后，建筑差異沉降得到了有效改善，滿足規(guī)范要求。

［關(guān)鍵詞］高層建筑；  差異沉降；  巖土體自身承載力；  樁基設(shè)計(jì)

中圖分類號(hào)：TU473-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)17-0121-05

Pile foundation design based on self-bearing capacity of rock and soil body

DONG Honghan1,2,4, LI Xinkai3, ZHUANG Ning4, ZHAO Songying4

(1 Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou 310058, China; 2 Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China；  3 College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China；  4 College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China)

Abstract:The foundation soil of a proposed high-rise building in Chongqing is uneven, and the height difference between the main building and the podium of the building is very large. The traditional design idea of pile foundation was to adopt the end bearing rock- embedded piles, which was easily cause the different settlement of butterfly shape beyond the code limit, resulting in the larger secondary stress of the structure. Based on the self-bearing capacity of the rock and soil body and the properties of the foundation soil, the pile layout scheme was optimized. Friction piles were adopted in areas with large buried depth of base rock, and rock-embedded piles were adopted in areas with shallow buried depth of base rock. The design of the pile foundation was verified by field static load test. The results show that the differential settlement of the building has been effectively improved to meet the requirements of the code after adjusting the design of the pile foundation.

Keywords:high-rise building; differential settlement; self-bearing capacity of rock and soil body; pile foundation design

*江蘇省水利科技項(xiàng)目（2017030）。

作者簡(jiǎn)介：董洪漢，博士研究生，Email:1037158873@qq.com;通信作者：莊寧，博士，副教授，Email:147510972@qq.com。