本文選題：依山而建 + 微變形減震樁�。� 參考：《安徽建筑大學(xué)》2015年碩士論文

【摘要】：近年來,伴隨著我國區(qū)域統(tǒng)籌發(fā)展戰(zhàn)略的不斷推進(jìn),中西部一些多山地區(qū)的城市建設(shè)步入了快車道。山區(qū)地形多變,地質(zhì)條件復(fù)雜,在這種環(huán)境條件中進(jìn)行工程的建設(shè)將面臨諸多技術(shù)難題。本文正是基于這種背景下以貴陽市標(biāo)志性建筑—貴陽花果園辦公一號(hào)樓在施工過程中遇到的技術(shù)難題為對(duì)象展開的相關(guān)研究論述。文中工程位于地形復(fù)雜的山區(qū),由于依山而建而受到場(chǎng)地限制,所以在設(shè)計(jì)時(shí)采用了高落差基礎(chǔ)設(shè)計(jì)方案。這個(gè)方案采用了把主體結(jié)構(gòu)的一部分基礎(chǔ)設(shè)置于山頂?shù)姆椒?由此產(chǎn)生了山頂樁基礎(chǔ)在復(fù)雜的受力狀態(tài)下能否保證山頂?shù)鼗踩膯栴}。為了解決這個(gè)問題在設(shè)計(jì)中采用了減震樁技術(shù),該技術(shù)利用轉(zhuǎn)移力的作用路徑和阻尼隔震的方法減輕地震荷載下上部結(jié)構(gòu)對(duì)作為地基的巖質(zhì)邊坡穩(wěn)定性的不利影響。為了對(duì)這種技術(shù)的原理和作用機(jī)制有更深入的理解,本文將從理論研究和工程實(shí)測(cè)兩方面入手對(duì)其進(jìn)行相關(guān)研究。在理論分析方面,本文在總結(jié)已有研究成果的基礎(chǔ)上結(jié)合工程實(shí)際情況對(duì)減震樁受力性能和巖質(zhì)邊坡穩(wěn)定性的相關(guān)理論進(jìn)行了研究分析。減震樁設(shè)計(jì)時(shí)考慮到地震發(fā)生時(shí)要求降低其對(duì)巖質(zhì)邊坡穩(wěn)定影響的目的,采取了利用其豎向承載能力而降低其水平承載能力的方法,這與普通混凝土灌注樁的承載性能有所不同,因此文中對(duì)減震樁的水平、豎向承載性能以及巖質(zhì)邊坡的穩(wěn)定理論進(jìn)行了論述。對(duì)于減震樁的減震作用研究,文中建立了上部主體結(jié)構(gòu)-減震樁-巖質(zhì)邊坡的有限元模型,模擬了在上部主體結(jié)構(gòu)自重荷載和地震荷載兩種受荷狀況下結(jié)構(gòu)體中減震樁與巖質(zhì)邊坡地基之間的相互作用機(jī)理,并對(duì)減震樁與巖質(zhì)邊坡之間的動(dòng)力相互作用進(jìn)行了闡述。在工程實(shí)測(cè)分析方面,通過對(duì)減震樁的受力性能監(jiān)測(cè)和巖質(zhì)邊坡變形的監(jiān)測(cè),分析了結(jié)構(gòu)自重荷載下減震樁的受力性能和巖質(zhì)邊坡的變形特征。通過本文對(duì)微變形減震樁力學(xué)性能和巖質(zhì)邊坡穩(wěn)定性計(jì)算方法的研究得出了以下結(jié)論:減震樁發(fā)揮的承載性能與端承型混凝土灌注樁較為相似,減震樁主要承受豎向荷載而對(duì)水平荷載的承擔(dān)較小,地震荷載下主體結(jié)構(gòu)產(chǎn)生的水平力主要傳至抗剪樁來承擔(dān);根據(jù)已有的樁基承載力計(jì)算和巖質(zhì)邊坡穩(wěn)定性研究成果,對(duì)減震樁的水平、豎向承載力計(jì)算方法進(jìn)行了論述,對(duì)水平地震荷載下判斷巖質(zhì)邊坡穩(wěn)定的動(dòng)力安全系數(shù)計(jì)算方法進(jìn)行了闡述。通過對(duì)花果園辦公一號(hào)樓工程減震樁受力、巖質(zhì)邊坡變形的監(jiān)測(cè)和有限元數(shù)值模型的計(jì)算分析,對(duì)水平地震荷載作用下微變形減震樁在保障巖質(zhì)高邊坡穩(wěn)定性方面發(fā)揮的效果進(jìn)行了量的推導(dǎo)。將這些結(jié)論應(yīng)用到工程實(shí)踐中可以為減震樁設(shè)計(jì)和施工提供相應(yīng)的理論參考,對(duì)同類工程基礎(chǔ)施工采用減震樁技術(shù)時(shí)的邊坡穩(wěn)定性判斷提供一種可以借鑒的方法。
[Abstract]:In recent years, with the continuous promotion of regional overall development strategy, urban construction in some mountainous areas in the central and western regions has entered the fast lane. The terrain of mountainous area is changeable and the geological condition is complex, so the construction of engineering in this environment will face many technical problems. This paper is based on the background of Guiyang landmark building-Guiyang flower orchard office building in the construction process of the technical difficulties encountered as the object of the relevant research. The project is located in the mountainous area with complicated terrain and is limited by the site because of its construction, so the design scheme of the high drop foundation is adopted in the design. This scheme adopts the method of setting a part of the foundation of the main structure on the top of the mountain, which leads to the problem of whether the pile foundation of the top of the mountain can guarantee the safety of the foundation of the top of the mountain under the complicated stress condition. In order to solve this problem, the shock absorption pile technique is adopted in the design, which uses the path of transfer force and the method of damping isolation to reduce the adverse effect of superstructure on the stability of rock slope as foundation under earthquake load. In order to have a deeper understanding of the principle and mechanism of this technique, this paper will study it from two aspects: theoretical research and engineering measurement. In terms of theoretical analysis, based on the summary of existing research results, combined with the actual engineering situation, this paper studies and analyzes the relevant theory of the bearing behavior of the pile and the stability of rock slope. In order to reduce the influence of earthquake on the stability of rock slope, the method of reducing the horizontal bearing capacity by using its vertical bearing capacity is adopted in the design of damping pile. This is different from the bearing capacity of ordinary concrete cast-in-place pile, so the level, vertical bearing capacity and stability theory of rock slope are discussed in this paper. In this paper, the finite element model of the superstructure, the damping pile and the rock slope is established. In this paper, the interaction mechanism between the pile and the foundation of rock slope is simulated, and the dynamic interaction between the pile and the rock slope is described. In the aspect of engineering measurement and analysis, the mechanical behavior of the pile and the deformation characteristics of the rock slope are analyzed by monitoring the mechanical behavior of the pile and the deformation of the rock slope under the self-weight load of the structure. In this paper, the mechanical properties of micro-deformation pile and the calculation method of rock slope stability are studied. The following conclusions are drawn: the bearing capacity of the anti-shock pile is similar to that of the end-bearing concrete cast-in-place pile. Shock absorption pile mainly bears vertical load but bears little horizontal load, the horizontal force generated by main structure under earthquake load is mainly transferred to shear pile, and according to the existing research results of pile foundation bearing capacity and stability of rock slope, the earthquake absorber pile is mainly subjected to vertical load, and the horizontal force generated by the main structure under earthquake load is mainly transferred to shear pile. The calculation method of horizontal and vertical bearing capacity of pile is discussed, and the calculation method of dynamic safety factor for judging the stability of rock slope under horizontal earthquake load is expounded. Through monitoring the deformation of rock slope and calculating and analyzing the finite element numerical model, the stress of the pile and the deformation of rock slope are analyzed. In this paper, the effect of microdeformed pile on the stability of high rock slope under horizontal earthquake load is derived. The application of these conclusions to engineering practice can provide a theoretical reference for the design and construction of shock absorber piles, and provide a reference method for judging slope stability in the construction of similar engineering foundations using shock absorbing pile technology.
【學(xué)位授予單位】：安徽建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU457

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