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前言多年来对膨胀土的研究表明,建筑物的基础如果穿过地基变形急剧层,落到含水量和变形较为稳定的土层上,建筑物升降幅度就能明显的减小。当急剧层较深时,选择桩基作为房屋基础,将会获得经济合理的效果。然而,膨胀土上桩基的设计,目前则还存在不少尚待解决的问题。为了探索膨胀土上灌注桩的工作状态,1976年在云南某厂内设立了试验场地,对位于地基土变形急剧层内和穿过急剧层的不同类型的灌注桩,进行了长达六年的变形观测和两年的含水量测试。通过这些试验,本文
Foreword The study of expansive soil over the years shows that if the foundation of a building passes through a sharp layer of ground deformation and falls on a soil layer with a stable water content and deformation, the magnitude of the building rise and fall can be significantly reduced. When the sharp layer is deep, choosing the pile foundation as the foundation of the house will have economic and reasonable results. However, there are still many problems to be solved in the design of pile foundation on expansive soil. In order to explore the working status of piles in expansive soil, a test site was set up in a factory in Yunnan in 1976. It took six years for various types of cast-in-situ piles located within the sharp layer of deformation of the foundation soil and across the steep layer. Deformation observations and two-year moisture content tests. Through these trials, this article