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（1 中國建筑科學研究院， 北京 100013； 2 中國地質大學工程技術學院， 北京 100083）
［摘要］根據大型現場模型試驗，對樁身內力、基底壓力、土層位移和樁基沉降進行測定并分析。本次試驗設計了4組模型，分別為載荷板試驗、單樁試驗、6d樁基礎（d為樁的直徑）試驗和天然地基試驗（承臺大小同6d樁基礎）。各組試驗結果表明：6d樁基礎的樁身壓縮小于單樁；在一定沉降條件下，6d樁基礎試驗和天然地基試驗（承臺大小同6d樁基礎）基底壓力基本一致；6d樁基礎在工作荷載情況下群樁效應不明顯；6d樁基礎的承載力特征值和沉降可根據天然地基靜載試驗及單樁靜載試驗進行預估；6d樁基礎沉降穩(wěn)定速率比天然地基快。
［關鍵詞］樁基礎； 樁身內力； 基底壓力； 群樁效應； 沉降控制
中圖分類號： TU473 文獻標識碼： A文章編號： 1002-848X(2016)S2-0505-05
Experimental study of pile foundation based on settlement control
Zhang Song1, Liu Jinbo1, Guo Jinxue1, Lei Meng2, Liu Minyi1
(1 China Academy of Building Research Foundation Research Institute, Beijing 100013, China；
2 School of Engineering and Technology, China University of Geosciences, Beijing 100083, China)
Abstract: Based on the field model tests on internal force of pile body, the base pressure, soil displacement and settlement of pile foundation were measured and analyzed. In this experiment, four groups of tests were designed, including load plate test, single pile test, 6d pile foundation test (d is the pile diameter) and natural foundation test （the same size of 6d pile foundation）. The test results of each group show that the pile compression of 6d pile foundation was smaller than that of single pile; Under certain settlement conditions, the base pressure of pile foundation test is basically the same as that of natural foundation test (the same size of 6d pile foundation); The group effect of 6d pile foundation is not obvious under the condition of normal use load; The eigenvalue and settlement of bearing capacity of 6d pile foundation can be estimated according to the test of natural ground load plate and the static load test of single pile. The settlement stability of 6d pile foundation is faster than that of natural foundation.
Keywords: pile foundation； internal force of pile body； base pressure； pile group effect； settlement control
作者簡介： 張松，碩士研究生，Email：1223600298@qq.com。
