方形筏基天然地基沉降快速估算初步研究
朱 鳴
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朱 鳴（北京市建筑設(shè)計(jì)研究院有限公司，北京100045）[摘要]《建筑地基基礎(chǔ)設(shè)計(jì)規(guī)范》( GB 50007-2011)中規(guī)定采用分層總和法來計(jì)算天然地基的沉降，計(jì)算過程比較復(fù)雜。為了快速地估算地基沉降數(shù)值，以方形基礎(chǔ)、單一土層天然地基為背景分析了地基沉降數(shù)值隨基礎(chǔ)尺寸、土層壓縮模量的變化規(guī)律。根據(jù)計(jì)算結(jié)果擬合出了地基沉降的快速估算經(jīng)驗(yàn)公式，同時(shí)給出了地基壓縮層深度的快速估算公式。采用本文給出的公式，可以快速地估算出方形筏基沉降和壓縮層深度的大致數(shù)值，給結(jié)構(gòu)工程師提供便利。[關(guān)鍵詞] 地基沉降；壓縮層深度；筏基；快速估算中圖分類號：TU470.3 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2012) S2-0510-03Preliminary research on quick estimation of subsoil deformation of square raft foundationZhu Ming( Beijing Institute of Architectural Design, Beijing 100045, China)Abstract: Code for design of building foundation( GB 50007-2011) requires that subsoil deformation should be calculated using layer summation method, which has a complicated procedure. To estimate subsoil deformation quickly, varying laws of subsoil deformation with foundation size and compressive modulus were analyzed on the background of square foundation and single soillayer. Quick estimation formula of subsoil deformation was concluded, and also that ofcompressed layer depth. Using these empirical formulas, structural engineers can calculate the approximate value of subsoil deformation and compressed layer depth conveniently.Keywords: subsoil deformation; compressed layer depth; raft foundation; quick estimation
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