本文選題：鉆孔灌注樁　切入點(diǎn)：施工　出處：《沈陽(yáng)建筑大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：鉆孔灌注樁由于其具有承載力高、可以穿越各種土層、對(duì)周邊環(huán)境危害小等優(yōu)點(diǎn),在高層、超高層的建筑物和重型構(gòu)筑物中被廣泛應(yīng)用。鉆孔灌注樁在施工時(shí)要把樁孔位置處的土排出地面,然后清除孔底殘?jiān)?安放鋼筋籠,最后澆筑混凝土,整個(gè)施工過(guò)程工序較多,且屬于地下或水下隱蔽工程,如果施工中操作不當(dāng),就可能會(huì)出現(xiàn)卡管、坍孔、鉆孔偏斜、斷樁等質(zhì)量缺陷,影響樁身的完整性和單樁承載能力,從而對(duì)整個(gè)工程安全造成威脅。因此,有必要針對(duì)具體工程、地質(zhì)等條件,探討鉆孔灌注樁的施工過(guò)程及質(zhì)量控制方法,以確保工程質(zhì)量。 本文將以營(yíng)口北海新區(qū)怡祥商務(wù)大廈項(xiàng)目為依托,對(duì)以下內(nèi)容進(jìn)行研究： 1、首先歸納樁基種類,按功能、樁間土相互作用特點(diǎn)、施工方法、幾何特征、樁身材料和制作方法等對(duì)樁基進(jìn)行分類論述； 2、論述工程實(shí)例的場(chǎng)地工程地質(zhì)條件和水文地質(zhì)條件,明晰當(dāng)?shù)氐貙咏Y(jié)構(gòu)和巖性特征,推薦樁基礎(chǔ)形式及樁端持力層,介紹巖石設(shè)計(jì)參數(shù)、樁基及降水設(shè)計(jì)方案,并對(duì)承載力特征值R。和樁身混凝土軸心抗壓強(qiáng)度f(wàn)。進(jìn)行了計(jì)算； 3、論述鉆孔灌注樁具體施工過(guò)程,包括樁位放線、埋設(shè)護(hù)筒、樁機(jī)定位、調(diào)制護(hù)壁泥漿、鉆孔、第一次清孔、鋼筋籠制作及吊放、安放導(dǎo)管、第二次清孔、測(cè)定沉渣、灌注混凝土等主要施工工藝及質(zhì)量控制要點(diǎn)； 4、介紹樁基質(zhì)量檢測(cè)方法,結(jié)合工程實(shí)例,通過(guò)單樁豎向靜載和鉆芯檢測(cè)的數(shù)據(jù)支持,分析鉆孔灌注樁施工中出現(xiàn)的樁長(zhǎng)、鋼筋籠、樁身強(qiáng)度、樁身完整性、樁端持力層、樁底沉渣和塌孔等關(guān)鍵控制點(diǎn)的質(zhì)量問(wèn)題的原因,并論述防治辦法。
[Abstract]:Because of its high bearing capacity, borehole cast-in-place pile can cross all kinds of soil layers and does little harm to the surrounding environment. Super-high-rise buildings and heavy-duty structures are widely used. During the construction of bored piles, the soil at the location of the pile holes should be removed from the ground, and then the residue from the bottom of the holes should be removed, reinforcement cages will be placed, and finally concrete will be poured, and the whole construction process will be more numerous. And it belongs to underground or underwater hidden engineering. If it is not operated properly in construction, there may be quality defects such as pipe sticking, hole collapse, borehole deflection and pile breaking, which will affect the integrity of pile body and the bearing capacity of single pile. Therefore, it is necessary to discuss the construction process and quality control method of bored cast-in-place pile in view of specific engineering and geological conditions in order to ensure the quality of the project. Based on the project of Yixiang Commercial Building in Yingkou Beihai New District, this paper will study the following contents:. 1. Firstly, the types of pile foundation are summarized, and the pile foundation is classified according to the function, the characteristics of soil interaction between piles, the construction method, the geometric characteristics, the material of pile body and the method of making pile. 2. The site engineering geological conditions and hydrogeological conditions of engineering examples are discussed, the local stratigraphic structure and lithologic characteristics are clarified, the pile foundation form and pile end bearing layer are recommended, and the rock design parameters, pile foundation and dewatering design scheme are introduced. The bearing capacity characteristic value R. and the axial compressive strength of pile body concrete are calculated. 3. The concrete construction process of bored cast-in-place pile is discussed, including the placement of pile position, the placement of retaining tube, the positioning of pile machine, the modulation of wall protection mud, the drilling hole, the first hole cleaning, the making and hoisting of steel cage, the placement of conduit, the second cleaning hole, and the determination of sediment. Main construction technology and quality control points of cast-in-place concrete; 4. The quality testing method of pile foundation is introduced. The pile length, reinforcement cage, pile body strength, pile integrity, pile end bearing layer are analyzed through the data support of single pile vertical static load and drilling core detection in the construction of bored cast-in-place pile. The causes of quality problems in key control points such as pile bottom sediment and hole collapse are discussed.
【學(xué)位授予單位】：沈陽(yáng)建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU753.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 張錦棟,舒翔,鐘才根;軟土中影響鉆孔灌注樁承載力的因素分析[J];上海地質(zhì);2003年04期

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本文編號(hào)：1637349