- 摘 要
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(1 天津大學(xué)建筑工程學(xué)院， 天津 300072； 2 河北省建筑科學(xué)研究院， 石家莊 050021；3 河北建研科技有限公司， 石家莊 050021)
［摘要］在軟土地基上進行長距離建筑物移位時，地基加固設(shè)計直接影響著建筑物的安全和工程造價。如何獲得既滿足沉降控制標準又能達到經(jīng)濟效益最優(yōu)的地基加固方案，成為該類工程的主要技術(shù)問題。依托龍溪塔移位工程，分析了軟土地基上移位工程的控制標準，并采用E.Winkler彈性地基梁法對復(fù)合地基加固后的軌道梁的沉降變形進行驗算。從控制地基及軌道梁沉降變形的技術(shù)經(jīng)濟角度考慮，通過調(diào)整樁間距和樁長兩個參數(shù)對原復(fù)合地基加固方案進行了優(yōu)化。龍溪塔的成功移位表明，在按承載力設(shè)計的基礎(chǔ)上，采用沉降控制的優(yōu)化設(shè)計可行，優(yōu)化后的加固方案較原方案節(jié)約了42%的經(jīng)濟成本。研究成果可為今后同類工程地基加固設(shè)計及實施提供借鑒。
［關(guān)鍵詞］移位工程； 復(fù)合地基； 沉降控制； 有限元計算； 優(yōu)化設(shè)計
中圖分類號：TU471+.8文獻標識碼：A文章編號：1002-848X(2016)24-0070-06
Optimum design of composite foundation for settlement control of ancient tower translocation project
Shang Dongfan1,2， Wang Tiecheng1， Qiang Wanming2， Miao Leiqiang3
(1 School of Civil Engineering， Tianjin University， Tianjin 300072， China; 2 Heibei Academy of Building Research, Shijiazhuang 050021, China; 3 Hebei Building Research Technology Co., Ltd., Shijiazhuang 050021, China)
Abstract:In the case of long-distance building translocation on soft solid foundation, the foundation reinforcement designs directly impact building safety and project cost. How to formulate a foundation reinforcement protocol to meet settlement control standards and obtain best economic benefits has become the main technology issue. Based on Longxi Tower translocation project, the control specification of translocation project on soft solid foundation was analyzed, and E.Winkler elastic foundation beam method was used to conduct checking on the settlement transformation of track beam treated by composite foundation. Considering from the technology and economy aspects of controlling foundation and track beam settlement transformation, the original composite foundation treatment scheme could be optimized by adjusting two parameters of whole pile spacing and pile length. The success of Longxi Tower translocation indicates that on the basis of design according to bearing capacity, it is feasible to adopt settlement control to optimize design, and the optimized reinforcement protocol can reduce 42% economic cost than the original one. This research result can provide references for the design and implementation of similar project foundation reinforcements.
Keywords:translocation project; composite foundation; settlement control; finite element calculation; optimum design
*河北省科技基金計劃項目（13255801D）。
作者簡介：商冬凡，博士研究生，教授級高工，一級注冊結(jié)構(gòu)工程師，Email:13933178581@163．com。
