松散軟弱介質(zhì)注漿擴(kuò)散和加固試驗(yàn)研究
發(fā)布時間：2018-07-22 14:55
【摘要】：隨著國民經(jīng)濟(jì)的發(fā)展,交通基礎(chǔ)設(shè)施建設(shè)速度不斷加快,礦產(chǎn)資源開采量與消耗量不斷增大,大批的交通隧道、礦井、巷道等地下工程項(xiàng)目提上建設(shè)日程。在地下工程的施工中,頻頻發(fā)生的地質(zhì)災(zāi)害嚴(yán)重威脅著施工人員及工程安全,其中突水突泥災(zāi)害是發(fā)生次數(shù)最多、危害性最大的一種。據(jù)統(tǒng)計,突水突泥災(zāi)害發(fā)生次數(shù)占地下工程事故發(fā)生總次數(shù)的一半以上。誘發(fā)突水突泥災(zāi)害的主要因素包括：自然因素和人為因素。自然因素主要包括地層存在的風(fēng)化破碎的巖體、軟弱夾層、巖溶裂隙等不良地質(zhì)體,是造成突水突泥災(zāi)害的根本原因；人為因素主要是工程施工產(chǎn)生的擾動,是造成突水突泥直接誘導(dǎo)因素。注漿是突水突泥災(zāi)害的治理中最為常見的手段,然而復(fù)雜多變的地質(zhì)條件給災(zāi)害的有效治理造成了不小的麻煩。主要表現(xiàn)在：(1)要針對特定地質(zhì)條件選用合適的注漿工藝,必需掌握和具備多種注漿工藝的施工方法和能力；(2)一些復(fù)雜的地層難以加固,造成了大量的人工和材料消耗。目前,關(guān)于注漿的研究大都是在單一介質(zhì)條件下進(jìn)行的,關(guān)于復(fù)雜介質(zhì)條件的注漿理論和工藝研究還很少有人開展。本文針對松散軟弱介質(zhì)條件,結(jié)合水泥單液漿析水特性,利用理論與試驗(yàn)根結(jié)合的方法,重點(diǎn)研究了水泥單液漿的擴(kuò)散和加固機(jī)理。主要研究內(nèi)容及結(jié)論包括以下幾點(diǎn)。(1)普通水泥單液漿存在迅速析水的特性。通過室內(nèi)試驗(yàn)方法證實(shí)了：無論在重力作用,還是注漿壓力作用下,水泥單液漿中多余的自由水都會迅速析出,造成漿液的濃度、粘度大大提高。(2)針對地質(zhì)條件的不均勻性,提出了優(yōu)勢擴(kuò)散區(qū)的概念,并把其分為滲透型優(yōu)勢擴(kuò)散區(qū)和壓縮型優(yōu)勢擴(kuò)散區(qū)。設(shè)計并開展了松散軟弱介質(zhì)注漿試驗(yàn),對漿液的擴(kuò)散現(xiàn)象、擴(kuò)散過程、以及遵循的擴(kuò)散理論進(jìn)行了研究。同時分析了漿液在擴(kuò)散過程中,由析水造成的性能變化。(3)設(shè)計并開展了松散軟弱介質(zhì)注漿加固試驗(yàn)。利用模型試驗(yàn)的方法,對含優(yōu)勢擴(kuò)散區(qū)介質(zhì)注漿,分析漿液擴(kuò)散現(xiàn)象,并測定注漿加固體強(qiáng)度,證明了優(yōu)勢擴(kuò)散區(qū)的存在有利于提高加固體強(qiáng)度、保證加固效果的穩(wěn)定。(4)在分析和研究注漿加固體單軸壓縮和漿-土界面破壞特征的基礎(chǔ)上,提出了“析水飽和層”的概念,認(rèn)為析水飽和層是注漿過程中形成的加固薄弱區(qū),解釋了加固體沿漿脈產(chǎn)生破壞的原因。
[Abstract]:With the development of national economy, the speed of traffic infrastructure construction is quickening, the mining quantity and consumption of mineral resources are increasing, a large number of underground engineering projects such as traffic tunnels, mines, roadways and so on are put on the construction schedule. In the construction of underground engineering, frequent geological disasters seriously threaten the safety of construction personnel and engineering, among which water inrush and mud inrush is one of the most frequent and harmful disasters. According to statistics, the number of water and mud inrush disasters accounts for more than half of the total number of underground engineering accidents. The main factors that induce water inrush and mud inrush include natural factors and human factors. Natural factors mainly include weathered rock mass, weak intercalation, karst fissures and other bad geological bodies, which are the fundamental causes of water inrush and mud inrush, and human factors are mainly disturbance caused by engineering construction. It is a direct inductive factor of water inrush and mud inrush. Grouting is the most common method in the treatment of water and mud inrush disasters, but the complex and changeable geological conditions cause great trouble to the effective management of disasters. The main results are as follows: (1) in order to select suitable grouting technology for specific geological conditions, it is necessary to master and possess the construction methods and capabilities of various grouting techniques; (2) some complex strata are difficult to reinforce, resulting in a large amount of labor and material consumption. At present, most of the research on grouting is carried out under the condition of single medium, and the research on grouting theory and technology of complex medium is seldom carried out. In this paper, the diffusion and reinforcement mechanism of cement single liquid slurry is studied by using the method of combining theory with test root according to the condition of loose weak medium and combined with the characteristics of water evolution of cement single liquid slurry. The main research contents and conclusions are as follows: (1) the common cement slurry has the characteristics of rapid water evolution. It is proved by laboratory test that the excess free water in single cement slurry will precipitate rapidly under the action of gravity or grouting pressure, resulting in a great increase in the concentration and viscosity of the slurry. (2) aiming at the inhomogeneity of geological conditions, The concept of dominant diffusion region is proposed, which is divided into permeable dominant diffusion region and compressed dominant diffusion zone. The grouting test of loose soft medium was designed and carried out. The diffusion phenomenon, diffusion process and diffusion theory of slurry were studied. At the same time, the performance changes caused by water evolution in the process of slurry diffusion are analyzed. (3) the grouting reinforcement test of loose weak medium is designed and carried out. By using the method of model test, the phenomenon of grouting diffusion in medium with dominant diffusion zone is analyzed, and the strength of grouting plus solid is measured. It is proved that the existence of dominant diffusion zone is beneficial to the enhancement of solid strength. (4) based on the analysis and study of the characteristics of grouting and solid uniaxial compression and the failure of the interface between slurry and soil, the concept of "saturated layer of water evolution" is put forward. It is considered that the saturated layer of water evolution is the weak zone formed in the process of grouting. The cause of failure along the pulping of solid was explained.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU943
本文編號：2137826
[Abstract]:With the development of national economy, the speed of traffic infrastructure construction is quickening, the mining quantity and consumption of mineral resources are increasing, a large number of underground engineering projects such as traffic tunnels, mines, roadways and so on are put on the construction schedule. In the construction of underground engineering, frequent geological disasters seriously threaten the safety of construction personnel and engineering, among which water inrush and mud inrush is one of the most frequent and harmful disasters. According to statistics, the number of water and mud inrush disasters accounts for more than half of the total number of underground engineering accidents. The main factors that induce water inrush and mud inrush include natural factors and human factors. Natural factors mainly include weathered rock mass, weak intercalation, karst fissures and other bad geological bodies, which are the fundamental causes of water inrush and mud inrush, and human factors are mainly disturbance caused by engineering construction. It is a direct inductive factor of water inrush and mud inrush. Grouting is the most common method in the treatment of water and mud inrush disasters, but the complex and changeable geological conditions cause great trouble to the effective management of disasters. The main results are as follows: (1) in order to select suitable grouting technology for specific geological conditions, it is necessary to master and possess the construction methods and capabilities of various grouting techniques; (2) some complex strata are difficult to reinforce, resulting in a large amount of labor and material consumption. At present, most of the research on grouting is carried out under the condition of single medium, and the research on grouting theory and technology of complex medium is seldom carried out. In this paper, the diffusion and reinforcement mechanism of cement single liquid slurry is studied by using the method of combining theory with test root according to the condition of loose weak medium and combined with the characteristics of water evolution of cement single liquid slurry. The main research contents and conclusions are as follows: (1) the common cement slurry has the characteristics of rapid water evolution. It is proved by laboratory test that the excess free water in single cement slurry will precipitate rapidly under the action of gravity or grouting pressure, resulting in a great increase in the concentration and viscosity of the slurry. (2) aiming at the inhomogeneity of geological conditions, The concept of dominant diffusion region is proposed, which is divided into permeable dominant diffusion region and compressed dominant diffusion zone. The grouting test of loose soft medium was designed and carried out. The diffusion phenomenon, diffusion process and diffusion theory of slurry were studied. At the same time, the performance changes caused by water evolution in the process of slurry diffusion are analyzed. (3) the grouting reinforcement test of loose weak medium is designed and carried out. By using the method of model test, the phenomenon of grouting diffusion in medium with dominant diffusion zone is analyzed, and the strength of grouting plus solid is measured. It is proved that the existence of dominant diffusion zone is beneficial to the enhancement of solid strength. (4) based on the analysis and study of the characteristics of grouting and solid uniaxial compression and the failure of the interface between slurry and soil, the concept of "saturated layer of water evolution" is put forward. It is considered that the saturated layer of water evolution is the weak zone formed in the process of grouting. The cause of failure along the pulping of solid was explained.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU943
【引證文獻(xiàn)】
相關(guān)會議論文 前1條
1 Masanori Nose;郭玉花;;日本大壩灌漿新技術(shù)(濕磨水泥)[A];現(xiàn)代灌漿技術(shù)譯文集[C];1991年
，本文編號：2137826
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