本文選題：基坑支護 + 雙排樁　； 參考：《昆明理工大學(xué)》2013年碩士論文

【摘要】：雙排樁支護結(jié)構(gòu)作為一種較為新型的支護方式,在控制基坑側(cè)移、方便施工、節(jié)省地下空間等方面具有良好的效果,受到廣大工程人士的青睞。但是從雙排樁的實際應(yīng)用情況來看,由于支護結(jié)構(gòu)本身受力較為復(fù)雜,現(xiàn)有的設(shè)計計算理論還有很大的不足,其理論研究成果遠遠滯后于工程應(yīng)用。目前有關(guān)雙排樁支護結(jié)構(gòu)的計算模型有多種,但還沒有一種能被廣泛接受和認可的計算方法來反映雙排樁的樁排距、連梁剛度或尺寸、樁長與樁徑等因素對支護結(jié)構(gòu)受力的影響；目前工程界針對雙排樁的設(shè)計采用的是國家規(guī)范和地區(qū)規(guī)程中的計算方法但是實踐表明該方法亦有一定的局限性。本文在此基礎(chǔ)上進行了更加深入的探討,主要研究內(nèi)容如下： 首先本文總結(jié)了雙排樁支護結(jié)構(gòu)幾種典型的布樁形式及常用的計算理論,并分析這幾種計算理論的基本原理、適用范圍及不足之處。 其次本文分析了大剛度排樁對滑移面的影響,提出懸臂式雙排樁結(jié)構(gòu)破壞時滑移面向下移動,并對雙排樁支護結(jié)構(gòu)的彈簧模型進行改進,探討不同埋深處的土層壓縮模量變化規(guī)律,并重新建立雙排樁計算模型。根據(jù)該模型討論了同等支護條件下不同樁間土剛度及高低型雙排樁對前后排樁彎矩及位移的影響。 最后,為進一步探討影響雙排樁支護結(jié)構(gòu)的主要因素對樁身彎矩位移的影響情況,本文以昆明市某基坑支護工程為背景,通過有限差分軟件FLAC3D模擬基坑的開挖及支護過程,著重分析排距、前后樁長、連梁剛度及樁間土剛度等因素對樁身彎矩及位移的變化規(guī)律,與實際工程監(jiān)測數(shù)據(jù)對比分析,并驗證前面對推導(dǎo)理論公式的可行性。結(jié)果亦表明該理論成果具有一定的工程實用價值。
[Abstract]:As a new type of support structure, double-row pile supporting structure has good effect in controlling the lateral displacement of foundation pit, convenient construction, saving underground space and so on, and has been favored by the vast number of engineers. However, from the practical application of double-row piles, the existing design and calculation theory is still very inadequate because of the complex force of the supporting structure itself, and the theoretical research results lag far behind the engineering application. At present, there are many kinds of calculation models about double-row pile supporting structure, but there is no widely accepted and accepted calculation method to reflect the pile spacing, stiffness or size of connecting beam. The influence of pile length, pile diameter and other factors on the force of supporting structure. At present, the design of double-row piles is based on the national code and regional rules, but the practice shows that this method also has some limitations. On this basis, this paper makes a more in-depth discussion, the main research contents are as follows: Firstly, this paper summarizes several typical pile layout forms and common calculation theories of double-row pile supporting structure, and analyzes the basic principle, applicable scope and deficiency of these calculation theories. Secondly, this paper analyzes the influence of large stiffness piles on the slip plane, puts forward that the sliding plane moves downward when the cantilever double-row pile structure is destroyed, and improves the spring model of the double-row pile supporting structure. The variation law of soil compression modulus in different depth of buried soil is discussed, and the calculation model of double row pile is re-established. According to the model, the influence of soil stiffness between different piles and double row piles of high and low type on bending moment and displacement of front and rear row piles under the same supporting condition is discussed. Finally, in order to further discuss the influence of the main factors of double-row pile supporting structure on the moment displacement of pile body, this paper simulates the excavation and supporting process of foundation pit by using finite difference software FLAC3D, taking a foundation pit support project in Kunming as the background. The variation law of pile bending moment and displacement caused by such factors as row distance, pile length before and after, stiffness of connecting beam and soil stiffness between piles are analyzed and compared with the monitoring data of actual engineering, and the feasibility of deducing the theoretical formula is verified. The results also show that the theoretical results have certain engineering practical value.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU473.1

【參考文獻】

相關(guān)期刊論文 前10條

1 丁海濤;趙春宏;楊保全;;雙排圍護樁支護結(jié)構(gòu)排距變化時變形和受力性能的三維非線性模擬計算[J];工程勘察;2007年12期

2 陸培炎;橫向荷載下土、樁共同作用的簡化法[J];廣東水電科技;1991年01期

3 封盛,辛業(yè)洪;深基坑雙排樁支護結(jié)構(gòu)優(yōu)化設(shè)計[J];基建優(yōu)化;2001年06期

4 蔡袁強,阮連法,吳世明,陳云敏;軟粘土地基基坑開挖中雙排樁式圍護結(jié)構(gòu)的數(shù)值分析及應(yīng)用[J];建筑結(jié)構(gòu)學(xué)報;1999年04期

5 鄭剛,李欣,劉暢,高喜峰;考慮樁土相互作用的雙排樁分析[J];建筑結(jié)構(gòu)學(xué)報;2004年01期

6 何頤華，，楊斌，金寶森，李瑞茹，譚永堅，王鐵宏;雙排護坡樁試驗與計算的研究[J];建筑結(jié)構(gòu)學(xué)報;1996年02期

7 熊巨華;一類雙排樁支護結(jié)構(gòu)的簡化計算方法[J];勘察科學(xué)技術(shù);1999年02期

8 陸培毅;楊靖;韓麗君;;雙排樁尺寸效應(yīng)的有限元分析[J];天津大學(xué)學(xué)報;2006年08期

9 許宏發(fā),吳華杰,郭少平,廖鐵平;樁土接觸面單元參數(shù)分析[J];探礦工程(巖土鉆掘工程);2002年05期

10 平揚,白世偉,曹俊堅;深基雙排樁空間協(xié)同計算理論及位移反分析[J];土木工程學(xué)報;2001年02期

本文編號：1962655