本文選題：SMW工法 + 支護設(shè)計��； 參考：《蘇州科技學(xué)院》2015年碩士論文

【摘要】：近些年,隨著深度深、面積大的基坑形式不斷涌現(xiàn),SMW工法在我國得到較多的應(yīng)用。但目前SMW工法理論仍不夠完善,為了解決以上問題,就需要對SMW工法基坑支護理論進行更深入研究并對其工藝進行優(yōu)化。首先,本文通過對SMW工法相關(guān)技術(shù)環(huán)節(jié)的理論分析和實際工程進行有限元分析手段進行了以下研究:(1)將型鋼水泥土攪拌墻中的型鋼按剛度等效的原理等效成為連續(xù)墻進而比較兩種不同支擋結(jié)構(gòu)下的基坑水平位移,分析水泥土對型鋼水泥土攪拌墻組合剛度的貢獻;(2)分析在混凝土與鋼支撐混合支撐體系下支撐預(yù)加力及剛度對基坑變形及內(nèi)力的影響;(3)通過以支護擋墻最大彎矩為目標函數(shù)采用分段等值梁法結(jié)合遺傳算法對支撐位置進行優(yōu)化布置;(4)模擬分析型鋼回收起拔力主要影響因素。通過上述分析研究得到以下主要成果:1、得出了SMW工法中水泥土對型鋼水泥土樁剛度的貢獻大小。2、分析了在混凝土與鋼混合支撐體系下支撐預(yù)加力及剛度對基坑變形及內(nèi)力的影響,并給出其在設(shè)計中的合理取值。3、以支護擋墻最大彎矩為目標函數(shù),采用分段等值梁法結(jié)合遺傳算法對SMW工法中支撐位置進行優(yōu)化布置。4、通過分析明確了基坑支護結(jié)構(gòu)變形較小時,型鋼起拔力主要由型鋼與水泥土之間的靜摩阻力控制,變形阻力可忽略,同時本文也給出了型鋼起拔力計算的建議公式。
[Abstract]:In recent years, with the deep depth and large area of foundation pit, SMW method has been widely used in China. However, the theory of SMW method is still not perfect at present. In order to solve the above problems, it is necessary to further study the theory of foundation pit support of SMW method and optimize its technology. First In this paper, the theoretical analysis of relevant technical links of SMW engineering method and the finite element analysis of practical engineering are carried out as follows: (1) the section steel in the SMW cement-soil mixing wall is equivalent to the continuous wall according to the principle of stiffness equivalence. And comparing the horizontal displacement of foundation pit with two different retaining structures, The contribution of cement soil to composite stiffness of steel cement soil mixing wall is analyzed; (2) the influence of bracing prestress and stiffness on the deformation and internal force of foundation pit under the mixed bracing system of concrete and steel bracing is analyzed; (3) the maximum bending moment of retaining wall is obtained by means of supporting retaining wall. For the objective function, the piecewise equivalent beam method combined with genetic algorithm is used to optimize the layout of the support position. (4) the main factors affecting the drawing force of the section steel recovery are simulated and analyzed. Through the above analysis and research, the following main achievements are obtained: 1, and the contribution of cement soil in SMW method to the stiffness of steel cement soil pile is obtained. The prestressing force of bracing and stiffness to foundation pit deformation under concrete and steel mixed bracing system are analyzed. The influence of shape and internal force, The reasonable value. 3 is given in the design. The maximum bending moment of retaining wall is taken as the objective function. By using the piecewise equivalent beam method and genetic algorithm, the support position in SMW method is optimized. Through the analysis, it is clear that the deformation of foundation pit support structure is small, and the drawing force of section steel is mainly controlled by static friction resistance between section steel and cement soil. The deformation resistance can be neglected, and the suggested formula for calculating the drawing force of section steel is also given in this paper.
【學(xué)位授予單位】：蘇州科技學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU753

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本文編號：2103493