【摘要】：本文以三灣公路邊坡危巖為典型代表進(jìn)行分析,采用現(xiàn)場調(diào)查、數(shù)值模擬方法、剛體極限平衡分析法、運(yùn)動(dòng)學(xué)等研究手段,對(duì)危巖失穩(wěn)崩塌的危巖體特點(diǎn)、失穩(wěn)模式、危巖穩(wěn)定性、崩塌落石運(yùn)動(dòng)路徑等問題進(jìn)行深入研究,得以下結(jié)論：1、重慶地區(qū)地質(zhì)巖性組合以軟硬巖互層為主要特征,在長期風(fēng)化營力和重力作用下,容易發(fā)生差異風(fēng)化,產(chǎn)生拉裂變形,形成危巖體。2、通過對(duì)落石路徑的驗(yàn)算與模擬,得出了落石過程的運(yùn)動(dòng)路徑、最大落石距離、碰撞動(dòng)能、彈跳高度等,但是,模擬過程計(jì)算量明顯減小,省時(shí)省力,而計(jì)算需要過程驗(yàn)算與判斷,費(fèi)時(shí)費(fèi)力；另外,路徑模擬還可以方便的進(jìn)行攔擋設(shè)置,進(jìn)行落石路徑模擬,可以方便的看出防治措施的效果,并為危巖防治提供依據(jù)。Rocfall軟件可以較好較快地為危巖防治提供依據(jù),適時(shí),可以運(yùn)用計(jì)算方式進(jìn)行輔助驗(yàn)算,以提高其準(zhǔn)確性。3、在理論分析計(jì)算基礎(chǔ)上,結(jié)合危巖特點(diǎn),提出了危巖治理措施,包括采用錨固、清除、支撐、封閉巖腔等綜合治理方法,對(duì)危巖頂部的裂隙進(jìn)行封閉處理,并在卸荷帶以外修截排水溝,坡腳修筑攔石網(wǎng)或攔石墻等。
[Abstract]:This paper takes the dangerous rock of Sanwan highway slope as a typical representative to analyze the characteristics of dangerous rock mass and the instability mode of unstable rock collapse by means of field investigation, numerical simulation, rigid body limit equilibrium analysis, kinematics, etc. The stability of dangerous rock and the path of collapse and falling stone movement are studied in depth. The conclusions are as follows: 1. The geological and lithologic assemblages in Chongqing area are characterized by interbedded soft and hard rocks. Under the action of long-term weathering force and gravity, differential weathering is easy to occur. By checking and simulating the rock falling path, the movement path, the maximum stone falling distance, the collision kinetic energy, the spring height and so on are obtained. However, the calculation amount of the simulation process is obviously reduced. Time and labor saving, and calculation needs process checking and judgment, time-consuming and laborious; In addition, the path simulation can also be convenient for blocking setting and rock falling path simulation, which can easily see the effect of prevention and control measures, and provide the basis for the prevention and control of dangerous rock. Rocfall software can provide the basis for the prevention and control of dangerous rock better and faster. On the basis of theoretical analysis and calculation, combined with the characteristics of dangerous rock, the measures for controlling dangerous rock are put forward, including anchoring, clearing and supporting. This paper deals with the cracks at the top of dangerous rock by comprehensive treatment methods such as sealing rock cavities and repairing drainage ditches outside the unloading zone and the stone-blocking net or wall at the foot of the slope and so on.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U418.55

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 姜永玲;重慶某高速鐵路沿線危巖體發(fā)育特征及防治措施研究[D];成都理工大學(xué);2011年

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本文編號(hào)：2320700