本文選題：TBM + 不良地質(zhì)因素�。� 參考：《長(zhǎng)春工程學(xué)院》2017年碩士論文

【摘要】：TBM工法是當(dāng)今世界隧道工程建設(shè)中最為先進(jìn)的施工方法,具有快速、安全、環(huán)保等優(yōu)勢(shì)被廣泛應(yīng)用于各國(guó)交通、水利等部門(mén)的地下工程建設(shè)中。然而,TBM在具有上述優(yōu)點(diǎn)的同時(shí),在施工過(guò)程中,也存在一些問(wèn)題,主要表現(xiàn)為兩方面,一方面,不良地質(zhì)因素如軟弱圍巖變形、隧洞突涌水等,處理措施不當(dāng)將會(huì)發(fā)展成嚴(yán)重工程事故,造成巨大人員傷亡和經(jīng)濟(jì)損失;另一方面,國(guó)內(nèi)目前仍沿用傳統(tǒng)鉆爆法以圍巖穩(wěn)定性為主的分級(jí)方法,但TBM是利用機(jī)械能破巖掘進(jìn),在施工過(guò)程中,刀盤(pán)和護(hù)盾對(duì)圍巖具有擠密作用,使TBM開(kāi)挖后的隧道可在短時(shí)間內(nèi)保持穩(wěn)定。因此,原分級(jí)方法并不能科學(xué)指導(dǎo)TBM施工。綜上所述,研究TBM施工中主要工程地質(zhì)災(zāi)害的產(chǎn)生原因、危害及防治措施以及研究適合于開(kāi)敞式TBM的圍巖分級(jí)方法,在現(xiàn)代TBM工法隧道技術(shù)研究中具有非常重要地位。本文以開(kāi)敞式TBM為例,結(jié)合“吉林中部城市引松供水”項(xiàng)目論述不良地質(zhì)因素如軟弱圍巖變形、隧洞突涌水、巖爆等產(chǎn)生的原因,造成的危害并提出處理措施。其中,隧洞突涌水為本項(xiàng)目中最為常見(jiàn)的工程地質(zhì)災(zāi)害,在大量室內(nèi)試驗(yàn)的基礎(chǔ)上,選定堵漏漿液的主要組分及各組分所占的比例,并通過(guò)正交試驗(yàn)對(duì)配方進(jìn)行優(yōu)選。優(yōu)選配方為:水灰比為0.59,緩凝劑酒石酸的含量為0.25%、PHP溶液的含量為3%,速凝劑鋁酸鈉的含量為1.6%。該配方性能參數(shù):可泵期為30min,初凝時(shí)間96min,終凝時(shí)間104min。對(duì)優(yōu)選漿液終凝時(shí)形成的結(jié)石體進(jìn)行了滲透系數(shù)的測(cè)定并對(duì)漿液結(jié)石體試塊進(jìn)行了1天、7天和28天的抗壓強(qiáng)度試驗(yàn),結(jié)果表明該優(yōu)化配方形成的結(jié)石體具有較高的強(qiáng)度和防滲性能,現(xiàn)場(chǎng)應(yīng)用效果表明,所研制的漿液對(duì)“吉林中部城市引松供水”隧道施工項(xiàng)目中的突涌水問(wèn)題有較好的堵漏效果。依據(jù)現(xiàn)場(chǎng)搜集不同樁號(hào)巖石的飽和單軸抗壓強(qiáng)度、巖體完整性系數(shù)、渣料特征、開(kāi)挖后實(shí)際揭露巖面特征,以施工速度為主要標(biāo)準(zhǔn)將原分級(jí)方法劃分的圍巖等級(jí)細(xì)分為8級(jí),并依據(jù)不同等級(jí)圍巖給出相應(yīng)的推薦掘進(jìn)參數(shù)。該分級(jí)方法在“吉林中部城市引松供水”項(xiàng)目中應(yīng)用效果較好。
[Abstract]:TBM method is the most advanced construction method in the tunnel engineering construction in the world. It has the advantages of fast, safe and environmental protection and has been widely used in the underground engineering construction of traffic, water conservancy and other departments in various countries. However, while TBM has the advantages mentioned above, there are also some problems in the construction process, which are mainly manifested in two aspects: on the one hand, the bad geological factors such as the deformation of weak surrounding rock, the water gushing of tunnel, etc. Improper treatment measures will develop into serious engineering accidents, resulting in huge casualties and economic losses. On the other hand, the traditional classification method of rock stability is still used in China, but TBM is driven by mechanical energy. In the process of construction, the cutter head and shield have compaction effect on the surrounding rock, so that the tunnel after TBM excavation can be kept stable in a short time. Therefore, the original classification method can not scientifically guide the construction of TBM. To sum up, it is very important to study the causes, hazards and prevention measures of the main engineering geological hazards in TBM construction, as well as the surrounding rock classification method suitable for open TBM. It is of great importance in the research of modern TBM tunnel technology. Taking open type TBM as an example, this paper discusses the causes of bad geological factors, such as deformation of weak surrounding rock, water gushing of tunnel and rockburst, combined with the project of "diversion and Water supply in Central Jilin City", and puts forward some measures to deal with them. The water gushing of tunnel is the most common engineering geological hazard in this project. On the basis of a large number of laboratory tests, the main components and the proportion of each component of the slurry are selected, and the formula is optimized by orthogonal test. The optimum formula is as follows: water cement ratio is 0.59, tartaric acid content is 0.25 and PHP solution content is 3, and sodium aluminate accelerant is 1.6. The formula performance parameters: the pump period is 30 min, the initial setting time is 96 min, and the final setting time is 104 min. The permeability coefficient of the stone formed during the final coagulation of the optimal slurry was measured, and the compressive strength tests were carried out for 1 day, 7 days and 28 days, respectively. The results show that the stone body formed by the optimized formula has higher strength and anti-seepage performance, and the field application results show that, The developed slurry has a good effect on blocking leakage in the tunnel construction project of "diversion and Water supply of Central Jilin City". According to the collection of saturated uniaxial compressive strength, integrity coefficient of rock mass, slag material characteristics and actual exposure of rock surface characteristics after excavation, the grade of surrounding rock which was classified by the original classification method is divided into 8 grades according to the main standard of construction speed. And according to different grade surrounding rock, the corresponding recommended tunneling parameters are given. The classification method has been applied well in the project of "diversion and Water supply of Central Jilin City".
【學(xué)位授予單位】：長(zhǎng)春工程學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TV554

【相似文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 翟梁皓;TBM在某引水隧道施工中應(yīng)用研究[D];長(zhǎng)春工程學(xué)院;2017年

，

本文編號(hào)：1962984