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［摘要］結(jié)合實(shí)際設(shè)計(jì)案例，針對(duì)浙江地區(qū)某工程場(chǎng)地內(nèi)三種力學(xué)特性差異明顯的中風(fēng)化粉砂巖持力層，初步設(shè)計(jì)階段按理論公式設(shè)計(jì)了不同樁長(zhǎng)、不同持力層和入巖深度的試樁方案，通過試樁情況和靜載試驗(yàn)結(jié)果，分析了不同中風(fēng)化持力層下單樁承載力的特點(diǎn)，比較了靜載試驗(yàn)與理論公式計(jì)算結(jié)果的差異，最終在施工圖階段優(yōu)化了樁基設(shè)計(jì)方案。
［關(guān)鍵詞］持力層；靜載試驗(yàn)；單樁承載力；優(yōu)化設(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(2011)10-0089-03
Optimal design of pile bearing capacity in complex pile bearing layers
Zhou Xiaoyue, Zhang Xuefeng(Architectural and Planning Design & Research Institute Co., Ltd. of Zhejiang University of Technology, Hangzhou 310014, China)
Abstract:Based on an actual case with three significant different medium weathered siltstone pile bearing layers on a construction site in Zhejiang, three pile testing programs for different length of pile, different pile bearing layers and the status of rocksocketed piles based on theoretical formula during the preliminary design stage were designed. Based on actual construction of pile testing and the results of three static load tests, the characteristics of pile bearing capacity in  different medium weathered siltstone pile bearing layers were analyzed. The results of theoretical formula and static load tests were compared, then the design of piles was optimized.
Keywords:bearing layer; static load test; bearing capacity of single pile; optimal design
*浙江省住房和城鄉(xiāng)建設(shè)廳［2010］166號(hào)資助項(xiàng)目（項(xiàng)目編號(hào)：1012）。
作者簡(jiǎn)介：周曉悅，高級(jí)工程師，Email：zhouxy_hz@163.com。
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