- 摘 要
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（廣州市設計院， 廣州 510620）
［摘要］通過對巖溶地區(qū)某高層住宅塔樓基礎方案的比選，論述了靜壓PHC管樁在巖溶地區(qū)CM復合地基的適用性，驗證了在巖土面較平整的巖溶地區(qū)，靜壓PHC管樁復合地基具有較好的經(jīng)濟性和環(huán)保性。同時，提出樁底溶洞注漿加固的方案。依據(jù)規(guī)范對CM復合地基的承載力和沉降進行了計算。計算結果表明，CM復合地基承載力與沉降滿足規(guī)范要求。在此基礎上，開展現(xiàn)場載荷試驗并采用軟件YJK對CM復合地基進行三維有限元分析?，F(xiàn)場試驗和有限元分析驗證了靜壓PHC管樁復合地基設計的合理性，保證了基礎設計的安全性。
［關鍵詞］巖溶地區(qū)； 復合地基； 基礎方案選型； 靜壓PHC管樁； 溶洞注漿加固
中圖分類號：TU472文獻標識碼：A文章編號：1002-848X(2018)09-0112-04
Application analysis of static pressure PHC pipe pile in composite foundation in karst district
Wang Weijun, Zhang Li, Li Weike, Han Jianqiang, Wang Weijiang
(Guangzhou Design Institute， Guangzhou 510620， China)
Abstract:Based on the comparison and selection of the foundation scheme of a high-rise building in karst area, the adaptability of static pressure PHC pipe pile used in the composite foundation in karst area was discussed. The composite foundation with static pressure PHC pipe pile was proved to be economic and environment protection in a relatively flat karst area. At the same time, the scheme of karst cave grouting reinforcement at the bottom of the pile was put forward. According to the code, the bearing capacity and settlement of the CM composite foundation were calculated. The results show that the bearing capacity and settlement of the CM composite foundation can meet the code requirements. And on this basis, the in-situ plate load test and YJK software were used to analyze the CM composite foundation using three-dimensional finite element method. The test results and finite element analysis verify the rationality of the composite foundation design with static pressure PHC pipe pile, and ensure the safety of the foundation design.
Keywords:karst district; composite foundation; foundation scheme selection; static pressure PHC pipe pile; karst cave grouting reinforcement
*國家自然科學基金資助（51608138）。
作者簡介：王維俊，碩士，高級工程師，一級注冊結構工程師，Email：wangweijun@gzdi.com。
