深基坑樁錨支護(hù)設(shè)計(jì)與數(shù)值模擬
本文選題:深基坑 + 樁錨支護(hù) ; 參考:《河北工程大學(xué)》2014年碩士論文
【摘要】:近幾十年來(lái),我國(guó)的經(jīng)濟(jì)得到了飛速發(fā)展,我國(guó)的城市化已成為必然趨勢(shì),城市化用地相對(duì)緊張。顯然基坑工程受到周?chē)h(huán)境的制約進(jìn)一步升級(jí),而且環(huán)境對(duì)基坑變形控制的要求也更加的嚴(yán)格。樁錨支護(hù)結(jié)構(gòu)對(duì)施工空間有較小的需求,并能有效地控制基坑變形,因此在基坑開(kāi)挖與支護(hù)過(guò)程中已被廣泛應(yīng)用。本文以邯鄲市某基坑工程為例,在詳細(xì)的介紹了樁錨支護(hù)設(shè)計(jì)理論和土壓力計(jì)算理論的基礎(chǔ)上,對(duì)該基坑進(jìn)行了理論計(jì)算和穩(wěn)定性分析,并利用MAIDAS/GTS軟件,對(duì)基坑的開(kāi)挖與支護(hù)進(jìn)行數(shù)值模擬,詳細(xì)分析了基坑和樁體的位移,通過(guò)改變支護(hù)樁的間距,,研究不同間距下支護(hù)樁以及土體的位移情況。 主要研究?jī)?nèi)容如下: (1)對(duì)研究的背景、意義以及國(guó)內(nèi)外深基坑的研究現(xiàn)狀進(jìn)行了論述,隨后介紹了本課題的研究?jī)?nèi)容與方法; (2)介紹了樁錨支護(hù)的工作機(jī)理以及變形特點(diǎn)等,然后樁錨支護(hù)的設(shè)計(jì)與計(jì)算方法,并結(jié)合工程實(shí)例,利用理正分析軟件計(jì)算出本工程包括支護(hù)樁彎矩、位移、剪力等計(jì)算結(jié)果,根據(jù)相應(yīng)的結(jié)果并根據(jù)已有的理論知識(shí)分析。為實(shí)際工程下一步計(jì)劃提供可行性建議; (3)首先對(duì)MIDAS/GTS做簡(jiǎn)要的闡述包括流程、主要分析功能等。隨后,利用MIDAS/GTS對(duì)邯鄲市某深基坑建立了模型,利用邁達(dá)斯MIDAS/GTS對(duì)實(shí)際工程進(jìn)行數(shù)值模擬,從土體應(yīng)力、變形、樁體的變形、錨桿的軸力等方面進(jìn)行分析,并通過(guò)更改支護(hù)樁的樁間距對(duì)深基坑樁錨支護(hù)設(shè)計(jì)進(jìn)行了對(duì)比分析。 通過(guò)對(duì)實(shí)際工程運(yùn)用理正軟件計(jì)算,并且利用MIDAS/GTS做數(shù)值模擬得出以下結(jié)論:MIDAS/GTS可以用于樁錨支護(hù)結(jié)構(gòu)做數(shù)值模擬分析,并且MIDAS/GTS做樁錨支護(hù)數(shù)值模擬的結(jié)果是可以被采納的。
[Abstract]:In recent decades, the economy of our country has been developing rapidly, the urbanization of our country has become an inevitable trend, and the land for urbanization is relatively tight. It is obvious that foundation pit engineering is further restricted by the surrounding environment, and the environmental requirements for foundation pit deformation control are more stringent. The pile-anchor supporting structure has less demand for construction space and can effectively control the deformation of foundation pit, so it has been widely used in the excavation and support process of foundation pit. Taking a foundation pit project in Handan city as an example, based on the detailed introduction of the design theory of pile and anchor support and the calculation theory of earth pressure, the theoretical calculation and stability analysis of the foundation pit are carried out, and the software MAIDAS/GTS is used to analyze the stability of the foundation pit. Numerical simulation of excavation and support of foundation pit is carried out, and displacement of foundation pit and pile body is analyzed in detail. By changing the spacing of supporting pile, the displacement of supporting pile and soil under different spacing is studied. The main contents of the study are as follows: 1) the background, significance and research status of deep foundation pit at home and abroad are discussed, and then the research contents and methods of this subject are introduced. This paper introduces the working mechanism and deformation characteristics of pile-anchor support, and then the design and calculation method of pile-anchor support are introduced. In combination with engineering examples, the calculation results of this project including bending moment, displacement and shear force of supporting pile are calculated by using the software of rational and positive analysis. According to the corresponding results and according to the existing theoretical knowledge analysis. To provide feasible advice for the next step plan of actual project; First of all, a brief description of the MIDAS/GTS, including the flow, the main analysis functions and so on. Then, the model of a deep foundation pit in Handan city is established by MIDAS/GTS, and the actual engineering is simulated by Midas MIDAS/GTS. The stress of soil, deformation of pile, deformation of pile body, axial force of anchor rod are analyzed from the aspects of soil stress, deformation of pile body, axial force of anchor rod and so on. The pile anchor support design of deep foundation pit is compared and analyzed by changing the pile spacing of supporting pile. By using the straightening software to calculate the actual engineering, and using MIDAS/GTS to do the numerical simulation, the following conclusions can be drawn: 1. Midas / GTS can be used for the numerical simulation and analysis of the pile-anchor support structure, and the results of the pile-anchor support numerical simulation made by MIDAS/GTS can be adopted.
【學(xué)位授予單位】:河北工程大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類(lèi)號(hào)】:TU753
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