本文選題：高邊坡 + 崩塌��； 參考：《中國(guó)地質(zhì)大學(xué)(北京)》2015年碩士論文

【摘要】：隨著西部大開(kāi)發(fā)戰(zhàn)略實(shí)施,越來(lái)越多的公路鐵路在西部山區(qū)開(kāi)工修建。由于西部地區(qū)山高坡陡的地形特點(diǎn),越來(lái)越多的工程問(wèn)題有待解決。本文以重慶到昆明公路修建中塘房村高邊坡為例,對(duì)其破壞機(jī)制和穩(wěn)定性進(jìn)行了系統(tǒng)的評(píng)價(jià),力圖給出有價(jià)值的數(shù)據(jù)供相關(guān)工程和研究作為參考。本文首先通過(guò)對(duì)勘查資料的整理和現(xiàn)場(chǎng)勘查對(duì)塘房村高邊坡及周?chē)牡匦蔚孛�、水文氣象、地層巖性、地質(zhì)構(gòu)造及區(qū)域地質(zhì)穩(wěn)定性進(jìn)行了研究,根據(jù)其結(jié)構(gòu)特征判斷其可能的破壞模式為滑移式破壞。對(duì)危巖體區(qū)域分別采用定性分析法中的極射赤平投影圖解法和定量分析法中的SARMA法和數(shù)值模擬法進(jìn)行穩(wěn)定性分析。通過(guò)赤平投影圖解分析該處邊坡在2組節(jié)理面和巖層層面的作用下被切割成一定大小傾向臨空方向的楔形體。這種楔形體不利于穩(wěn)定,在暴雨和地震條件下很可能發(fā)生失穩(wěn)破壞。通過(guò)定量分析法中的SARMA法和數(shù)值模擬軟件UDEC的計(jì)算,得出在天然工況下,邊坡發(fā)生整體失穩(wěn)的可能性不大。在暴雨工況下,由于邊坡受雨水的浸泡和沖刷,巖塊和結(jié)構(gòu)面的強(qiáng)度都有所下降,整體穩(wěn)定性處于臨界滑動(dòng)狀態(tài),可能發(fā)生變形破壞。在地震工況下,本文采用底部輸入正弦波,在周期震動(dòng)的作用下邊坡處于失穩(wěn)狀態(tài)。最后,本文在可能發(fā)生崩塌落塊的位置選用rocfall軟件對(duì)巖石崩落的軌跡給予預(yù)測(cè)。以圖表形式給出落石的落距、速度、能量、彈跳高度的概率分布,建議采取柔性網(wǎng)防護(hù)并結(jié)合監(jiān)測(cè)預(yù)警裝置進(jìn)行治理。
[Abstract]:With the implementation of the western development strategy, more and more roads and railways are being built in the western mountainous areas. More and more engineering problems need to be solved due to the topographic characteristics of high mountain and steep slope in the western region. Taking the construction of Zhongtang Fangcun High Slope of Chongqing to Kunming Highway as an example, this paper systematically evaluates its failure mechanism and stability, and tries to provide valuable data for reference of relevant engineering and research. In this paper, the topographic, geomorphology, hydrometeorology, stratigraphic lithology, geological structure and regional geological stability of Tangfang village high slope are studied through the collation of exploration data and field survey. According to its structural characteristics, the possible failure mode is sliding failure. The stability analysis of dangerous rock mass region is carried out by using the method of polar projection diagram in qualitative analysis method and the SARMA method and numerical simulation method in quantitative analysis method. The slope is cut into wedges with a certain size in the direction of the face of the air under the action of two groups of joint planes and strata by using the projection diagram of the plane. This kind of wedge is not good for stability, and it is likely to be unstable under heavy rain and earthquake. Through the calculation of the SARMA method and the numerical simulation software UDEC in the quantitative analysis method, it is concluded that the slope instability is not likely to occur under natural conditions. Under the heavy rain condition, the strength of the rock block and the structural plane are decreased because the slope is soaked and washed by Rain Water, and the whole stability is in the critical sliding state, which may result in deformation and failure. In this paper, the sinusoidal wave is input from the bottom of the slope under the earthquake condition, and the slope is in the state of instability under the action of periodic vibration. Finally, rocfall software is used to predict the trajectory of rock caving. The probability distribution of falling distance, velocity, energy and jumping height of falling stone is given in the form of chart. It is suggested that flexible net protection should be adopted in combination with monitoring and warning device.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U416.14;P642.2

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本文編號(hào)：1924373