Analytical solutions for consolidation of composite ground with granular columns under time - dependent loading 變化荷載下散體材料樁復合地基固結解析解
The analytical theory for one - dimensional large - strain and non - linear consolidation of soft soils under time - dependent loading obtained herein provides a direct and efficiency tool for the verification of numerical methods used in solving large - strain consolidation problems . moreover , the semi - analytical method and the corresponding computer code developed provide more reasonable theoretical supports for practical consolidation analyses and computations of soft clayey soils 本文在簡化假定下給出的考慮變荷載的軟粘土一維大應變非線性固結解析解為大應變固結問題各種數值解法的驗證提供了直接有效的工具;建立的半解析法和編制的相應程序為實際軟粘土地基的固結分析提供了更為先進合理的理論支撐。
Analytical solution was obtained for one - dimensional large - strain and non - linear consolidation of single - layered soil under time - dependent loading on the basis of some simplifications . meanwhile , semi - analytical method was proposed for solving more complicated consolidation problem and corresponding computer code was developed for one - dimensional large - strain consolidation analyses , in which , complicated factors such as selfweight , non - linear and rheological properties of soft soils can be all taken into consideration . the correctness of the method and that of the code were verificated through comparing the results with those obtained from available analytical solutions 然后根據離散和解析相結合的原則,利用已有的成層地基一維線彈性固結解析解,建立了能求解復雜一維固結問題的半解析方法,編制了相應的能綜合考慮土的非線性、流變、成層性、自重以及變荷載等復雜因素的軟粘土一維大應變固結計算程序,并通過與已有各種解析解的比較對半解析法及其程序的正確性和有效性進行了驗證。
A corresponding computer program named aodnrcls is developed for the first time for solving non - linear rheological consolidation problem , in which important characteristics of soft clay such as its non - linear rheological and layered properties , the variation of permeability , the self - weight and time - dependent loading can be taken into account . the reliability of the program is verified through being compared with other known analytical solutions and numerical methods 首次編制了能同時考慮土的非線性流變特性、成層性、滲透性變化以及土體自重和變荷載的固結計算程序aodnrcls ,并且通過與已有的解析解或數值方法計算結果進行比較,驗證了本文半解析算法和程序的正確性。
The self - weight of soil is an important factor affecting consolidation , and once it is taken into consideration , the consolidation becomes quicker and final settlement becomes larger . rheological property of soft soil contributes to delaying consolidation . the influences such as nonlinear variations of compressibility and permeability , rheological and layered properties of soil , self - weight and time - dependent loading are interacted each other and very complicated , and only they are all taken into consideration , can the consolidation behavior of soft soils be actually revealed 研究表明:大、小應變固結理論的差異隨土壓縮性或荷載的增大而越趨明顯;土體自重是影響固結的一個重要因素,考慮自重要比不考慮自重固結快、最終沉降大;土的流變性增大將最終遲滯軟土地基的固結;土的壓縮性和滲透性的非線性變化、土的流變性、成層性、自重及變荷載等因素對固結的影響相互交織,錯綜復雜,在固結分析中對之綜合加以考慮,才能真實反映軟土的固結性狀。