- 摘 要
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（北京清華同衡規(guī)劃設(shè)計(jì)研究院有限公司節(jié)材研究與結(jié)構(gòu)優(yōu)化中心， 北京 100083）
［摘要］高層建筑中的軟弱夾層地基處理起來比較困難，最終不得不采用樁基等低性價(jià)比方案，對其極限承載力的研究需求比較迫切。對軟弱夾層地基承載力進(jìn)行研究，結(jié)果表明：現(xiàn)行地基基礎(chǔ)規(guī)范未考慮土層界面的摩擦作用，對軟弱夾層地基承載力的規(guī)定偏于保守，而薄層擠壓理論可給出合理結(jié)果；對文中工程算例考慮土層界面摩擦作用后，軟弱夾層地基承載力有較大富余，表明采用天然地基方案是可行的。
［關(guān)鍵詞］軟弱夾層地基； 薄層擠壓理論； 軟弱下臥層理論
中圖分類號：TU470+.3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2016)16-083-05
Ultimate bearing capacity analysis of soft interlayer foundation
Wang Changxing, Liu Minghui, Chen Chuncai
(Materials Saving Research and Structural Optimization Center, Beijing Tsinghua Urban Planning and Design Institute， Beijing 100083, China)
Abstract:It is hard to cope with the soft interlayer foundation of high-rise buildings, therefore the low cost performance scheme such as pile foundation scheme has to be adopted eventually and the need to study its ultimate bearing capacity is urgent. The bearing capacity of soft interlayer foundation was studied. The results show that the current foundation specification does not consider soil interface friction, and specifications on bearing capacity of soft interlayer foundation are conservative and thin-layer squeezing theory can give a reasonable result; considering soil interface friction in the engineering example, bearing capacity of soft interlayer foundation has large surplus, indicating that it′s feasible to adopt the natural foundation scheme.
Keywords:soft interlayer foundation; thin-layer squeezing theory; soft substratum theory
作者簡介：王昌興，教授級高級工程師， Email:china-xing@126.com。
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