【作者】 梁专明；

【导师】 隆威； 叶爱斌；

【作者基本信息】 中南大学 ， 地质工程， 2009， 硕士

【摘要】 以长沙商贸旅游职业技术学院工程边坡为工程背景,论文研究了软质岩顺层边坡的非典型溃屈型滑坡及其防治问题。1.该滑坡是一种新型的溃屈破坏型式,命名为非典型溃屈型滑坡。非典型溃屈型滑坡滑坡的特征是：软质顺层岩质边坡,滑动面不临空,坡趾前方一定距离处的坡底岩体弯曲-隆起、被损伤。尚未出现分阶段演化特征或暂时不能确定分阶段演化,可能的演化模式是弯曲-隆起带顶部剪断破坏。当坡底的岩体(板梁)达到屈服或“屈曲”(buckling),即弯曲-隆起带顶部剪断破坏时,滑坡可能再次失稳滑动。2.分析、论证了本背景工程边(滑)坡地下水动力模型是间歇下渗—裂隙潜水型及地下水对岩质边坡的作用机理是裂隙内地下水动、静水压力作用(含滑面上的扬压力),及暂态饱和区地下水的重力作用(以岩土体的湿容重、饱和容重表现)。3.分析认为边坡岩体是被结构面切割的不连续地质体,应垂直分为强风化及卸荷带、中风化带等,各带的强度是一个综合强度概念。定量评价了边坡强风化及卸荷带、中风化带岩体综合抗剪强度τ,计算了滑坡速度以及在滑动时间内作用于坡底岩体的平均作用力。4.认为本背景工程滑坡的经典分类是推移式滑坡,始滑处地质力学模式是塑流-拉裂,始滑处破坏条件应符合岩桥拉伸破坏判别准则：σ3=-T0(岩体抗拉强度)。5.论文提出了剩余下滑推力计算模型：假设弯曲—隆起带顶部为剪出口,采用传递系数法完成滑坡剩余下滑推力计算,但剩余下滑推力计算结论应取止坡底,该处条块的剩余下滑推力角度为0°。该计算模型与现状相吻合。6.因为非典型溃屈型滑坡的滑动面不临空及坡底岩体被损伤的特性,应区分边坡运动的变形阶段和破坏阶段进行综合防治,针对性地在边坡坡体分别采取主动型预防和治理工程措施,应慎重或不宜在坡底采取被动受力型预防和治理工程措施。防治工程设计采用可靠度β≥1.65量值,即满足我国现行的工程规范体系要求。本工程边坡整体采用重力式挡土边坡墙+格构梁+锚杆支护防治。更多还原

【Abstract】 Changsha Commerce &Tourism College background for the project Slope thesis studied soft bedding rock slope’s atypical buckles’-landslip and its prevention and treatment issues.1. The landslide is a new type of buckling failure type, named atypical buckling-type landslideAtypical buckling-type landslide landslide features are:soft bedding rock slope, sliding surface is not invading, the slope toe at a certain distance in front of the gradient at the base of rock bent-uplift, can become damaged. Yet to emerge in stages, or is temporarily unable to determine the evolution characteristics of the phased evolution of the possible evolution pattern is curved-uplift at the top of shearing failure. When the gradient at the base of the rock (plate girder) to achieve yield or "buckling" (buckling), or curved-uplift at the top of cut damage, landslides might once again slip instability.2. Analysis demonstrated engineering side of this background (slide) slope hydrodynamic model is intermittent infiltration-cracks dive type and groundwater on the rock slope of the role of the mechanism of fracture within the underground movement, hydrostatic pressure (including the sliding surface uplift pressure), and the transient saturated zone groundwater gravity (in rock and soil wet bulk density, saturated bulk density performance).3. Analysis of rock slope was cut structural surface discontinuities of geological bodies, should be divided into strong vertical wind and unloading zone, in the weathering zone and so on, each with the strength of the concept of an integrated intensity. Quantitative evaluation of the slope strong weathering and unloading zone, the integrated shear strength of rock weathering with the calculation speed of the landslide and the role of sliding time, the average force on the gradient at the base of rock.4. That the decline of this background work that goes on the classic-style landslide classification before sliding Department geomechanical model is the plastic flow-pull crack before sliding failure conditions at the bridge should be consistent with rock tensile failure criterion:σ3=-T0 (rock tensile strength). 5. Paper presents a calculation model of the residual thrust down:the assumption that bending-shear uplift at the top for the export, transfer coefficient method used to complete the remaining slide down thrust calculation, but the calculation of the remaining thrust down the conclusions should be taken only at its base, the compartmentalization of down thrust angle for the remainder of 0°. The calculation model in line with the status quo.6. Because of the atypical buckles’landslip is not invading the sliding surface and the base rock by injury characteristics, to distinguish between the slope of the deformation phase of movement and destruction of a comprehensive prevention and treatment phase, targeted slope in the slope taken active measures for the prevention and treatment project, be careful or it would not be appropriate to take a passive force at its base to prevent and control type measures. Control the use of reliability engineering valueβ≥1.65, which works to meet China’s current system requirements specification. Slope of this project as a whole using gravity-type retaining wall, slope+lattice beam+bolting control.更多还原