【摘要】：本文基于重慶交通科技項目“蓄水后三峽工程重慶港碼頭建設關(guān)鍵技術(shù)研究”，分別通過理論分析、物理模型試驗和有限元數(shù)值模擬方法，對鋼護筒嵌巖樁的水平受力特性進行研究。主要的研究內(nèi)容和相關(guān)結(jié)論有： （1）結(jié)合鋼管混凝土樁理論，系統(tǒng)分析了大直徑嵌巖樁及鋼管混凝土柱受力特性，提出了基于組合剛度的m法計算鋼護筒嵌巖樁水平承載能力，通過分別考慮有無鋼護筒兩種情況對比分析，，可以看出考慮了鋼護筒效應后樁基水平承載能力大幅提高。 （2）根據(jù)相似理論，結(jié)合實際工程，完成了模型設計，包括模型材料的確定，材料參數(shù)的確定，模型材料的換算，模型的制作，加載設計、測點斷面的布置等。制成有、無鋼護筒時嵌巖深度分別3D、4D、5D共6根樁進行了水平承載性狀試驗。在水平荷載作用下，鋼護筒嵌巖樁相比普通嵌巖樁，水平承載能力大幅提高、水平位移大幅降低。 （3）參考室內(nèi)模型實驗參數(shù)應用大型數(shù)值模擬用軟件ABAQUS創(chuàng)建數(shù)值模型，將有限元結(jié)果與室內(nèi)模型試驗數(shù)據(jù)對比，結(jié)果吻合，進而驗證了數(shù)值模擬的可行性、有效性。建立以果園港二期工程樁基原型參數(shù)為基礎(chǔ)的有限元模型，分析發(fā)現(xiàn)在水平荷載作用下鋼護筒分擔了約80%的應力；通過對嵌巖深度、鋼護筒壁厚、有無上覆蓋層、有無泥皮、鋼護筒有無帶肋條等分析探討了鋼護筒水平承載能力的影響因素，并進行各影響因素的敏感度分析，進而提出相應的改善措施。
[Abstract]:Based on Chongqing Transportation Science and Technology Project "Research on the key Technology of Chongqing Transportation Science and Technology Project after impoundment", through theoretical analysis, physical model test and finite element numerical simulation method, The horizontal stress characteristics of steel retaining pipe rock socketed pile are studied. The main research contents and related conclusions are as follows: (1) based on the theory of concrete-filled steel tube pile, the mechanical characteristics of large diameter rock-socketed pile and concrete-filled steel tube column are systematically analyzed. The m method based on composite stiffness is put forward to calculate the horizontal bearing capacity of steel retaining tube rock socketed pile. Through the comparison and analysis of whether or not there is steel shield, it can be seen that the horizontal bearing capacity of pile foundation is greatly improved after considering the effect of steel shield. (2) according to the similarity theory and practical engineering, the model design is completed, including the determination of the model material, the determination of the material parameters, the conversion of the model material, the making of the model, the loading design, the layout of the section of the measuring point, and so on. Six piles (3D, 4D, 5D) with and without steel shield were tested for the horizontal load-bearing behavior of the piles with different rock socketed depths of 3 D, 4 D and 5 D respectively. Under the action of horizontal load, the horizontal bearing capacity of steel pipe rock-socketed pile is greatly improved and the horizontal displacement is greatly reduced compared with ordinary rock-socketed pile. (3) using the large-scale numerical simulation software ABAQUS to create the numerical model according to the experimental parameters of the indoor model, and comparing the finite element results with the experimental data of the indoor model, the results are in good agreement, and the feasibility and effectiveness of the numerical simulation are verified. A finite element model based on prototype parameters of pile foundation of Orchard Port II project is established. It is found that the steel protector can share about 80% of the stress under the action of horizontal load. Based on the analysis of the depth of rock socketed, the thickness of steel shield wall, the overlying layer, the mud cover and the ribbed strip, the influence factors of the horizontal bearing capacity of steel shield tube are discussed, and the sensitivity analysis of each influence factor is carried out. Then the corresponding improvement measures are put forward.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U656.1

【參考文獻】

相關(guān)期刊論文 前9條

1 彭雪平,周雷靖;摩擦樁側(cè)泥皮問題分析及處理[J];電力勘測設計;2005年04期

2 曹周紅,劉曉平,沈志剛;山區(qū)河流碼頭型式及其發(fā)展趨勢[J];湖南交通科技;2004年02期

3 李軍堂,戴宗誠;蕪湖長江大橋雙壁鋼圍堰大直徑鉆孔樁施工[J];公路;2000年10期

4 羅瑞華;蕪湖長江大橋主塔墩大直徑雙壁鋼圍堰深水基礎(chǔ)施工[J];公路;2003年04期

5 趙明華,王貽蓀,肖鶴松;多層地基橫向受荷樁的分析[J];建筑結(jié)構(gòu);1994年02期

6 黃亮生,馮向宇;鋼護筒參與樁身受力的構(gòu)造處理和計算分析[J];結(jié)構(gòu)工程師;2005年04期

7 穆保崗;班笑;龔維明;;考慮鋼護筒效應的混合樁水平承載性能分析[J];土木建筑與環(huán)境工程;2011年03期

8 陳菊香,劉克萍,俞亞南1,馮世挺;基于P-Y曲線的水平承載群樁有限元分析[J];江南大學學報;2005年02期

9 韓林海,陶忠,堯國皇,楊有福;鋼管混凝土基本構(gòu)件承載力的設計計算——各國規(guī)程比較(Ⅰ)[J];建筑鋼結(jié)構(gòu)進展;2002年03期

本文編號：2439745