【摘要】：滑坡是一種全球性的地質(zhì)災(zāi)害，世界上許多國(guó)家均遭受的危害。我國(guó)幅員遼闊，大約有70%的國(guó)土為山區(qū)且地形地質(zhì)復(fù)雜，滑坡災(zāi)害比較頻發(fā)。近年來(lái)隨著國(guó)內(nèi)現(xiàn)代化進(jìn)程的不斷加快，工程建設(shè)中遇到的滑坡災(zāi)害越來(lái)越多，它中斷交通、摧毀廠礦、阻塞河道、掩埋村鎮(zhèn)，造成人員傷亡和巨大的經(jīng)濟(jì)損失。因此進(jìn)行滑坡的穩(wěn)定性分析以及結(jié)合實(shí)際地質(zhì)情況采取適當(dāng)?shù)闹卫泶胧╋@得尤為重要。而抗滑樁由于其布置靈活、施工方便、土方量小、工期短等優(yōu)點(diǎn)，使其作為一種重要的滑坡防止措施被廣泛采用。 為了研究抗滑樁的各種參數(shù)對(duì)滑坡治理工程的影響，本文對(duì)滑坡的穩(wěn)定性分析和抗滑樁的基本理論研究進(jìn)行了詳細(xì)的闡述。同時(shí)在眾多學(xué)者研究的基礎(chǔ)上結(jié)合山西某煤礦滑坡實(shí)際治理工程，采用FLAC3D4.0有限差分軟件對(duì)滑坡建模進(jìn)行數(shù)值模擬分析，，通過(guò)逐一改變抗滑樁的樁位布置，錨固深度兩種參數(shù)，對(duì)滑坡開(kāi)挖引起的周邊土體及支護(hù)結(jié)構(gòu)的變形進(jìn)行了研究與分析，得出了有關(guān)參數(shù)對(duì)其影響作用的大小。本文主要成果如下： （1）通過(guò)對(duì)某煤礦場(chǎng)地滑坡工程的分析并結(jié)合本地區(qū)同類工程實(shí)踐經(jīng)驗(yàn)，利用滑坡的穩(wěn)定性分析及滑坡防治的基本理論，確定了該滑坡的破壞機(jī)理和穩(wěn)定性。 （2）通過(guò)分析對(duì)比防治滑坡的各項(xiàng)措施，最終確定了采用抗滑樁的防治措施。再根據(jù)抗滑樁設(shè)計(jì)的基本理論和軟件的分析計(jì)算，結(jié)合該礦區(qū)滑坡實(shí)際情況對(duì)抗滑樁進(jìn)行設(shè)計(jì)，認(rèn)識(shí)了抗滑樁在滑坡治理中的重要性。 （3）當(dāng)在其它參數(shù)相同的條件下，抗滑樁樁位布置對(duì)滑坡治理的影響很大。樁位布置太高不能夠有效地防治滑坡，但抗滑樁布置在滑坡的底部即滑坡推力最低處并非最宜。所以為了充分利用滑坡的抗滑段并保證抗滑樁在最不利滑動(dòng)面處有合理埋深，一般在滑坡推力分布曲線的反彎點(diǎn)到滑坡出口段布樁比較合理。在該模型中，通過(guò)將抗滑樁分別布置在距離坡頂35m、70、105m處分別進(jìn)行模擬分析，驗(yàn)證了本工程2-2剖面段的設(shè)計(jì)中將抗滑樁布置在距坡頂70m處是合理的。 （4）抗滑樁埋入滑動(dòng)面的錨固深度，直接關(guān)系到抗滑樁對(duì)滑坡的防治效果。抗滑樁錨固深度太小時(shí)，滑坡位移不斷增大，不能達(dá)到滑坡治理的效果。當(dāng)錨固深度不斷加大超過(guò)一定范圍時(shí)，雖然達(dá)到了防治效果，但是所增加的抗滑效果不在那么明顯，并且造價(jià)高很不經(jīng)濟(jì)。在該工程中通過(guò)取抗滑樁的錨固深度分別為1-5倍的樁徑進(jìn)行模擬分析，最終可知抗滑樁錨固深度取抗滑樁樁徑的3-4倍比較確定合理。
[Abstract]:Landslide is a global geological disaster, many countries in the world have suffered harm. China has a vast territory, about 70% of the territory is mountainous and complex topography and geology, landslide disasters occur frequently. In recent years, with the acceleration of domestic modernization, more and more landslide disasters have been encountered in engineering construction. It interrupts traffic, destroys factories and mines, blocks rivers, and buries villages and towns, resulting in casualties and huge economic losses. Therefore, it is particularly important to analyze the stability of landslide and take appropriate treatment measures according to the actual geological conditions. Because of its flexible arrangement, convenient construction, small earthwork quantity and short construction period, anti-slide pile has been widely used as an important landslide prevention measure. In order to study the influence of various parameters of anti-slide pile on landslide treatment engineering, the stability analysis of landslide and the basic theoretical research of anti-slide pile are described in detail in this paper. At the same time, on the basis of many scholars' research, combined with the actual treatment project of a coal mine landslide in Shanxi Province, the FLAC3D4.0 finite difference software is used to simulate and analyze the landslide modeling. By changing the pile position arrangement and anchoring depth of the anti-slide pile one by one, the deformation of the surrounding soil and supporting structure caused by landslide excavation is studied and analyzed, and the influence of the relevant parameters on the deformation is obtained. The main results of this paper are as follows: (1) based on the analysis of landslide project in a coal mine site and the practical experience of similar projects in this area, the failure mechanism and stability of the landslide are determined by using the stability analysis of landslide and the basic theory of landslide prevention and control. (2) through the analysis and comparison of the measures to prevent and control landslide, the prevention and control measures of anti-slide pile are finally determined. According to the basic theory of anti-slide pile design and the analysis and calculation of software, combined with the actual situation of landslide in this mining area, the design of anti-slide pile is carried out, and the importance of anti-slide pile in landslide treatment is recognized. (3) when the other parameters are the same, the location arrangement of anti-slide pile has a great influence on the treatment of landslide. The pile position arrangement is too high to effectively prevent and control the landslide, but the anti-slide pile arrangement at the bottom of the landslide, that is, the lowest thrust of the landslide, is not the most suitable. Therefore, in order to make full use of the anti-slide section of the landslide and ensure that the anti-slide pile has a reasonable buried depth at the most unfavorable sliding surface, it is generally reasonable to arrange the pile at the reverse bending point of the thrust distribution curve of the landslide to the exit section of the landslide. In this model, the anti-slide pile is arranged at 35m from the top of the slope and 70105m from the top of the slope respectively, and it is verified that it is reasonable to arrange the anti-slide pile at 70m from the top of the slope in the design of the 2 鈮

本文編號(hào)：2504067