發(fā)布時間：2018-04-27 14:51

  本文選題：基坑支護 + 方案優(yōu)化　； 參考：《西安工業(yè)大學》2017年碩士論文

【摘要】：在工程建設中,基坑支護因其功能的重要性和設計的復雜性一直是廣大學者們研究的對象,在基坑支護的設計、施工和監(jiān)測過程中需要結(jié)合巖土和結(jié)構(gòu)等專業(yè)知識來進行分析和研究,以在實現(xiàn)安全適用的同時從環(huán)保角度出發(fā),探討如何提高基坑支護的施工效率、降低材料損耗及最大限度地消除對場地的污染和對環(huán)境的干擾。即,如何獲得滿足可持續(xù)發(fā)展需要的綠色支護方案是具有研究價值的課題。本文闡述了綠色支護方案的設計理論,并在工程常見的基坑支護方案中,列舉并對比了多種支護型式的特點和適用性,指出了預應力混凝土管樁作為基坑支護材料的優(yōu)點�；诙鄬哟位疑u價決策體系建立了基坑支護方案的優(yōu)選模型,列出了基本的計算流程和步驟,并給出了計算各指標權(quán)重的方法。通過西安某建筑深基坑的工程實例,從地層特征和場地條件出發(fā),將基坑支護材料的力學性能、施工周期、工程造價和場地環(huán)境等綜合因素作為設計要求,計算了材料所需的性能和成本,結(jié)合工程實際需要,進而選定灌注樁、PHC管樁和PRC管樁做進一步對比。以多層次灰色評價模型為依據(jù),從數(shù)值分析角度給出了最優(yōu)解,即PRC管樁在本工程中為最優(yōu)的綠色支護方案。最后,對該深基坑的最優(yōu)支護方案進行優(yōu)化,在荷載較大處采用承載力較大的PRC樁型,在荷載較小處采用承載力較小的PHC樁型。本文將多層次灰色評價決策體系應用于基坑支護方案的選擇,基于規(guī)范和相關文獻構(gòu)建了評價指標體系,建立了多層次灰色評價模型。該方法可從多個角度綜合評價方案的優(yōu)劣,尤其適用于研究如基坑支護這種多因素共存且相互影響的對象。經(jīng)過分析,PRC管樁作為基坑支護材料,能夠在安全適用的基礎上,滿足高效、節(jié)能的要求,是具有工程應用價值的,PRC管樁支護方案是適于推廣的基坑綠色支護方案。目前,使用預制樁作為基坑支護樁在西安市尚不多見,大多數(shù)工程項目是憑經(jīng)驗選用灌注樁+預應力錨索作為基坑支護方案。本文從基坑支護的原理出發(fā),對比預制樁+預應力錨索方案和灌注樁+預應力錨索方案,從理論計算、現(xiàn)場施工的適宜性、施工的便捷性及周期、工程造價等方面進行分析,旨在從綠色支護方案的理念出發(fā),探索更適合本工程的綠色的基坑支護方案。本文的研究成果可作為西安市及其他地區(qū)基坑支護方案選型的參考,具有一定的意義。
[Abstract]:In the construction of engineering, the importance and complexity of the foundation pit support have always been the research object of the vast majority of scholars. In the process of design, construction and monitoring of foundation pit support, it is necessary to combine the specialized knowledge of rock and soil and structure to analyze and study it in order to realize the application of safety and environmental protection. Improving the construction efficiency of the foundation pit support, reducing the material loss and eliminating the pollution to the environment and the disturbance to the environment. That is, how to obtain the green support scheme to meet the needs of sustainable development is a subject of research value. This paper expounds the design theory of the green support scheme and the common foundation pit supporting scheme in the project. The characteristics and applicability of various types of support are enumerated and compared. The advantages of prestressed concrete pipe pile as foundation pit support material are pointed out. Based on the multi-level grey evaluation decision system, the optimization model of foundation pit support scheme is set up, the basic calculation process and steps are listed, and the methods for calculating the weight of each index are given. After the engineering example of a deep foundation pit in Xi'an, starting from the formation characteristics and site conditions, the mechanical properties of the foundation pit supporting materials, the construction period, the construction cost and the site environment are used as the design requirements. The required performance and cost of the material are calculated, and the cast-in-place pile, PHC pipe pile and PRC pipe pile are selected in combination with the actual needs of the project. On the basis of the multi-level grey evaluation model, the optimal solution is given from the angle of numerical analysis, that is, the optimal green support scheme for PRC pipe pile in this project. Finally, the optimal support scheme for the deep foundation pit is optimized, and the PRC pile with larger bearing capacity is adopted in the larger load, and the bearing capacity is adopted at the smaller load. The multi-layer grey evaluation decision system is applied to the selection of the foundation pit support scheme, and the evaluation index system is constructed based on the standard and related literature, and a multi-level grey evaluation model is established. This method can be used to evaluate the advantages and disadvantages of the scheme from many angles, especially in the study of the multi factors such as foundation pit support. After analysis, PRC pipe pile, as a foundation pit supporting material, can meet the requirements of high efficiency and energy saving on the basis of safety and application. It is of engineering application value. PRC pipe pile supporting scheme is a green supporting scheme suitable for popularization of foundation pit. At present, it is not much to use prefabricated pile as foundation pit supporting pile in Xi'an According to the principle of foundation pit support, this paper contrasts the precast pile + prestressed anchor cable scheme and the cast-in-place pile + prestressed anchor cable scheme, from the theoretical calculation, the site construction suitability, the construction convenience and the period, the project cost and so on. The purpose of this paper is to explore a green foundation pit supporting scheme which is more suitable for this project. The research results of this paper can be used as a reference for the selection of foundation pit support schemes in Xi'an and other areas, and it has certain significance.

【學位授予單位】：西安工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU753

【參考文獻】

相關期刊論文 前10條

1 郝際平;孫曉嶺;薛強;樊春雷;;綠色裝配式鋼結(jié)構(gòu)建筑體系研究與應用[J];工程力學;2017年01期

2 吉同慶;徐欣;黃小影;;工程實例中深基坑支護樁施工方案的探討[J];江蘇建筑;2016年06期

3 趙敏;胡博;;黃土地區(qū)基坑降水對周邊構(gòu)筑物損壞的評判[J];西安工業(yè)大學學報;2016年10期

4 劉保縣;戴佳偉;舒志樂;;變權(quán)層次分析法在深基坑支護方案優(yōu)選中的應用[J];西華大學學報(自然科學版);2016年06期

5 趙敏;胡博;;黃土地區(qū)基坑降水對鄰邊建筑物損壞評價方法[J];鐵道工程學報;2016年09期

6 王瑞華;;濕陷性黃土場地灰土擠密樁間距設計初探[J];華北地震科學;2015年S1期

7 張春生;趙三欣;;淺談我國綠色建筑現(xiàn)狀及發(fā)展[J];價值工程;2015年19期

8 王離;;預應力管樁的最新進展和發(fā)展趨向[J];混凝土與水泥制品;2015年02期

9 趙升峰;黃廣龍;馬世強;周文苑;章新;;預制混凝土支護管樁在深基坑工程中的應用[J];巖土工程學報;2014年S1期

10 王敏;;建筑工程綠色施工現(xiàn)狀分析及推進建議[J];山西建筑;2014年25期

相關碩士學位論文 前10條

1 楊玉貴;PRC管樁在珠三角地區(qū)某軟土基坑工程中的應用研究[D];南華大學;2016年

2 田宇航;都市地鐵車站施工風險防控與對策[D];重慶交通大學;2015年

3 曾君;基于多層次灰色評價的深基坑支護工程投標方案優(yōu)選[D];西南科技大學;2015年

4 黎海彬;基于價值工程的深大基坑綠色支護方案優(yōu)化評價[D];成都理工大學;2014年

5 侯小杰;西安地鐵深基坑支護方案優(yōu)選[D];西安建筑科技大學;2014年

6 邱本勝;黃土基坑排樁支護結(jié)構(gòu)分析方法探討[D];西安建筑科技大學;2012年

7 張亮亮;深基坑樁錨支護結(jié)構(gòu)分析與評價方法應用研究[D];湖南大學;2011年

8 吳曉娜;西安地區(qū)深基坑支護結(jié)構(gòu)的優(yōu)化方法研究[D];西安建筑科技大學;2010年

9 趙祥;PHC管樁在深基坑支護中的工程應用研究[D];西安建筑科技大學;2008年

10 田根宏;西安地鐵二號線黃土工程特性研究[D];西安理工大學;2008年

，

本文編號：1811172