本文選題：邊坡穩(wěn)定性 + 任意形狀滑動面��； 參考：《合肥工業(yè)大學(xué)》2016年博士論文

【摘要】：邊坡臨界滑動場法是目前確定任意形狀臨界滑動面最有效的方法之一。經(jīng)過十余年的發(fā)展,邊坡臨界滑動場法已初步成為計(jì)算邊坡穩(wěn)定性的新方法,但其在水力、加固等復(fù)雜條件下的應(yīng)用尚需進(jìn)一步研究、完善。本文在已有研究成果的基礎(chǔ)上,在不同水力條件及加固措施下對邊坡臨界滑動場計(jì)算方法進(jìn)行改進(jìn),拓展其應(yīng)用范圍,使其成為理論嚴(yán)密、功能完善、通用性更強(qiáng)的邊坡穩(wěn)定分析新方法。同時(shí),本文在課題組已有研究成果的基礎(chǔ)上,開發(fā)了一款人機(jī)交互性能良好的邊坡臨界滑動場計(jì)算系統(tǒng)。本文完成的主要研究工作和成果總結(jié)如下:(1)水力條件下的邊坡臨界滑動場計(jì)算方法研究。針對鄰水岸坡坡外水位變化及坡內(nèi)非飽和-非穩(wěn)定滲流的復(fù)雜情況,結(jié)合有限元滲流計(jì)算得到孔隙水壓力場,并基于非飽和土的抗剪強(qiáng)度理論,對邊坡臨界滑動場進(jìn)行改進(jìn),提出非飽和-非穩(wěn)定滲流條件下的邊坡臨界滑動場計(jì)算方法;針對河岸崩塌問題的分析和研究,在考慮江河水位變化及坡內(nèi)非穩(wěn)定滲流基礎(chǔ)上,同時(shí)考慮水流沖刷引起的河床沖深及河岸后退,提出了水流沖刷過程中的邊坡臨界滑動場計(jì)算方法,適用于天然江河崩岸的預(yù)測與模擬;針對具有較大張裂縫的邊坡,在強(qiáng)降雨條件下雨水沿張裂縫入滲易積水形成靜水壓力而對邊坡穩(wěn)定不利的情況,結(jié)合降雨條件下飽和-非飽和滲流分析,考慮降雨過程中的瞬態(tài)孔隙水壓力場與瞬態(tài)強(qiáng)度場,并同時(shí)考慮張裂縫充水時(shí)的靜水壓力,提出降雨條件下具有張裂縫的邊坡臨界滑動場計(jì)算方法,解決了張裂縫靜水壓力影響下的任意形狀滑動面搜索問題。代表性算例及工程應(yīng)用驗(yàn)證了水力條件下邊坡臨界滑動場計(jì)算方法的合理性及可靠性。(2)加固條件下的邊坡臨界滑動場計(jì)算方法研究。傳統(tǒng)方法計(jì)算錨固力作用下邊坡穩(wěn)定性時(shí),將錨固力作為集中力處理,針對錨固力傳統(tǒng)處理方式下的邊坡臨界滑動場方法在搜索任意形狀臨界滑動面時(shí)會使得滑面發(fā)生突變,且得到的滑面正應(yīng)力和條間力分布極不合理的問題,將半無限體受集中力作用的彈性力學(xué)近似解作為錨固力等效內(nèi)力模型,提出了更為合理的錨固結(jié)構(gòu)作用下的邊坡臨界滑動場計(jì)算方法;此外,針對確定加筋土邊坡破裂面位置和形狀這一難點(diǎn),將加筋作用視為滑動面上的等效力,同時(shí)考慮力與力矩平衡,建立了基于嚴(yán)格法的加筋土邊坡臨界滑動場計(jì)算方法。通過典型算例及工程應(yīng)用表明,加固措施會影響邊坡臨界滑動面的形狀和位置,上述方法能夠搜索到加固作用下更合理的臨界滑動面,得到的安全系數(shù)也更合理、更可靠。(3)以面向?qū)ο蟮某绦蛟O(shè)計(jì)語言C#為開發(fā)工具,在Visual Studio 2013開發(fā)平臺上,建立了邊坡臨界滑動場計(jì)算系統(tǒng),并自帶繪圖功能,可通過繪圖來建立邊坡計(jì)算幾何模型。通過4個(gè)典型算例與兩個(gè)工程應(yīng)用表明,本文邊坡臨界滑動場計(jì)算系統(tǒng)已具有較好的通用性,已具備分析工程實(shí)際中復(fù)雜邊坡穩(wěn)定性的能力,計(jì)算結(jié)果也合理可靠。
[Abstract]:The critical sliding field method of slope is one of the most effective methods to determine the critical sliding surface of arbitrary shape. After more than ten years of development, the slope critical sliding field method has already become a new method to calculate the stability of the slope. However, the application of the slope under the complex conditions such as hydraulic and reinforcement needs to be studied and perfected. On the basis of different hydraulic conditions and reinforcement measures, the slope critical sliding field calculation method is improved, and its application scope is expanded to make it a new method of slope stability analysis with strict theory, perfect function and more versatility. At the same time, on the basis of the existing research results of the project group, this paper has developed a good human-computer interaction. The main research work and achievements in this paper are summarized as follows: (1) study on the calculation method of critical sliding field of slope under hydraulic conditions. The pore water pressure field is obtained by combining the finite element seepage calculation for the complicated conditions of the water level outside the slope of the slope and the unsaturated seepage in the slope. In the theory of shear strength of unsaturated soil, the critical sliding field of slope is improved and the calculation method of critical sliding field of slope under unsaturated and unsteady seepage is put forward. The method of calculating the critical sliding field of the slope in the process of water erosion is put forward, which is suitable for the prediction and Simulation of the natural river bank. Considering the transient pore water pressure field and transient intensity field in the process of rainfall, and considering the hydrostatic pressure of the tensional crack at the same time, the calculation method of the critical sliding field with a crack under the rainfall condition is put forward to solve the search problem of the arbitrary shape sliding surface under the influence of the static water pressure under the influence of the tension crack. The rationality and reliability of the critical sliding field calculation method of slope under hydraulic conditions is verified by the example and engineering application. (2) study on the calculation method of critical sliding field of slope under reinforcement conditions. When the traditional method is used to calculate the stability of the slope under the anchor force, the anchoring force is treated as the concentrated force, and the edge of the traditional method of anchoring force is used. The slope critical sliding field method can make the slip surface abrupt when searching for the critical sliding surface of arbitrary shape, and the problem that the normal stress and the distribution of the force between the slider are extremely unreasonable. The elastic mechanics approximate solution of the semi infinite body under the action of the concentrated force is taken as the equivalent internal force model of the anchor force, and the more reasonable anchorage structure is proposed. In addition, in view of the difficulty of determining the position and shape of the fractured surface of the reinforced soil slope, the reinforcement effect is considered as the equal effect on the sliding surface, and the force and torque balance is considered, and the critical sliding field calculation method based on the strict method is established. The reinforcement of the critical sliding field based on the strict method is proved by the typical example and the engineering application. The measures will affect the shape and position of the critical sliding surface of the slope. The above method can search the more reasonable critical sliding surface under the reinforcement effect, and the safety factor is more reasonable and more reliable. (3) the calculation of the critical sliding field of the slope is established on the Visual Studio 2013 development platform with the object-oriented programming language C# as the development tool. The system, and with the drawing function, can establish the slope calculation geometric model by drawing. Through 4 typical examples and two engineering applications, it shows that the slope critical sliding field calculation system has good generality, and has the ability to analyze the stability of the complex slope in the engineering practice, and the calculation results are also reasonable and reliable.

【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TU43

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