公路高邊坡穩(wěn)定性分析與抗滑樁優(yōu)化設計
發(fā)布時間：2019-06-06 10:26
【摘要】：近年來,現(xiàn)代化城鎮(zhèn)建設日新月異,偏遠地區(qū)正在大量建造高速公路。這些地區(qū)工程地質條件惡劣,為滿足設計需求,產生了許多高填路堤和深挖路塹,其形成的高邊坡穩(wěn)定性問題日益嚴重。本文以杭新景高速公路七里連接線12#高邊坡治理項目為依托,基于極限平衡原理,采用多種方法對高邊坡穩(wěn)定性進行了模擬分析;并對高邊坡抗滑樁加固方案開展了優(yōu)化設計。主要研究成果如下:(1)根據(jù)12#高邊坡的工程地質條件,基于Rocsicence Slide軟件,建立了邊坡二維計算模型,采用極限平衡法,計算了天然、暴雨、地震工況下邊坡的穩(wěn)定系數(shù),對邊坡穩(wěn)定性進行了分析。(2)基于Rocsicence Slide軟件,采用可靠度分析法,研究了邊坡穩(wěn)定性對各因素(巖土體參數(shù)、地震系數(shù)、地下水位)的敏感性。對邊坡穩(wěn)定性開展了概率分析,利用破壞概率評價了邊坡的穩(wěn)定性。(3)采用ABAQUS建立了邊坡三維計算模型。利用其流體/位移單元,將邊坡滲流場和應力場直接耦合,結合強度折減法模擬分析了天然、暴雨工況下邊坡的穩(wěn)定性。揭示了邊坡的滲流場、塑性變形區(qū)、邊坡各點水平、豎向位移等,判斷了邊坡失穩(wěn)時的滑動面位置和形狀,評價了邊坡的穩(wěn)定性,為邊坡治理提供依據(jù)。(4)高邊坡抗滑樁加固方案優(yōu)化�；贏BAQUS模擬分析了抗滑樁不同設計參數(shù)(樁位、樁長、樁間距、樁橫截面)下邊坡的塑性區(qū)、位移、穩(wěn)定系數(shù)及抗滑樁的位移的變化規(guī)律,提出了抗滑樁的最優(yōu)加固方案。
[Abstract]:In recent years, the construction of modern cities and towns is changing with each passing day, and a large number of highways are being built in remote areas. The engineering geological conditions in these areas are bad. In order to meet the design needs, many high fill embankment and deep cutting have been produced, and the stability of high slope is becoming more and more serious. In this paper, based on the 12# high slope treatment project of Qili connection line of Hangzhou Xinjing Expressway, based on the principle of limit equilibrium, the stability of high slope is simulated and analyzed by various methods. The reinforcement scheme of high slope anti-slide pile is optimized. The main research results are as follows: (1) according to the engineering geological conditions of 12# high slope, based on Rocsicence Slide software, the two-dimensional calculation model of slope is established, and the stability coefficient of slope under natural, rainstorm and seismic conditions is calculated by using limit equilibrium method. The stability of slope is analyzed. (2) based on Rocsicence Slide software and reliability analysis method, the sensitivity of slope stability to various factors (rock and soil parameters, seismic coefficient, groundwater level) is studied. The probability analysis of slope stability is carried out, and the stability of slope is evaluated by failure probability. (3) the three-dimensional calculation model of slope is established by ABAQUS. By using the fluid / displacement element, the seepage field and stress field of the slope are directly coupled, and the stability of the slope under natural and rainstorm conditions is simulated and analyzed with the strength reduction method. The seepage field, plastic deformation zone, horizontal and vertical displacement of the slope are revealed, the position and shape of the sliding surface when the slope is unstable are judged, and the stability of the slope is evaluated. It provides the basis for slope treatment. (4) Optimization of anti-slide pile reinforcement scheme for high slope. Based on ABAQUS simulation, the plastic zone, displacement, stability coefficient and displacement of anti-slide pile under different design parameters (pile position, pile length, pile spacing, pile cross section) are analyzed, and the optimal reinforcement scheme of anti-slide pile is put forward.
【學位授予單位】：中國地質大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U416.14
，
本文編號：2494287
[Abstract]:In recent years, the construction of modern cities and towns is changing with each passing day, and a large number of highways are being built in remote areas. The engineering geological conditions in these areas are bad. In order to meet the design needs, many high fill embankment and deep cutting have been produced, and the stability of high slope is becoming more and more serious. In this paper, based on the 12# high slope treatment project of Qili connection line of Hangzhou Xinjing Expressway, based on the principle of limit equilibrium, the stability of high slope is simulated and analyzed by various methods. The reinforcement scheme of high slope anti-slide pile is optimized. The main research results are as follows: (1) according to the engineering geological conditions of 12# high slope, based on Rocsicence Slide software, the two-dimensional calculation model of slope is established, and the stability coefficient of slope under natural, rainstorm and seismic conditions is calculated by using limit equilibrium method. The stability of slope is analyzed. (2) based on Rocsicence Slide software and reliability analysis method, the sensitivity of slope stability to various factors (rock and soil parameters, seismic coefficient, groundwater level) is studied. The probability analysis of slope stability is carried out, and the stability of slope is evaluated by failure probability. (3) the three-dimensional calculation model of slope is established by ABAQUS. By using the fluid / displacement element, the seepage field and stress field of the slope are directly coupled, and the stability of the slope under natural and rainstorm conditions is simulated and analyzed with the strength reduction method. The seepage field, plastic deformation zone, horizontal and vertical displacement of the slope are revealed, the position and shape of the sliding surface when the slope is unstable are judged, and the stability of the slope is evaluated. It provides the basis for slope treatment. (4) Optimization of anti-slide pile reinforcement scheme for high slope. Based on ABAQUS simulation, the plastic zone, displacement, stability coefficient and displacement of anti-slide pile under different design parameters (pile position, pile length, pile spacing, pile cross section) are analyzed, and the optimal reinforcement scheme of anti-slide pile is put forward.
【學位授予單位】：中國地質大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U416.14
，
本文編號：2494287
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