Stability Evaluation And Green Support Design Of High And Steep Complex Structure Slope Under Urban Limiting Condition

Since the21st century，With the rapid development of economy in our countryand the unity of the national urban and rural planning layout。Especially in theconstruction of the development of the urban. Land resource is more and moreScarce，the contradiction of Effective land diminishing and the increasing urbanpopulation and land resources shortage are increasing prominently. Due to the sitestrictly restricted by land red line，Combined with the construction scale of thegrowing building，More and more high artificial slope appear in engineering，Oncethese slopes slump occurred，Will bring a great harm to people’s life. Coupled withintensive and complexity of the urban layout，Impact on the surrounding existingbuildings must be avoided，Therefore reasonably be artificial high slope stabilityevaluation and support design is particularly important。Specific slope because of the different positions in which its geologicalstructure，the different degree of weathering，different groundwater conditions showeddifferent geometric and mechanical boundary conditions. Slope venue for such acomplex geotechnical structures mixed mode.，Due to the fluctuation two partsmaterial is different，Failure Mechanism and modes are different，Will not form aunified sliding surface，But according to the features of their respective unstableblock。The upper soil layer can adopt the traditional simplified bishop arc articlepoints method in soil mechanics automatic search the most dangerous arc technologyto achieve the upper part of the soil slope stability calculation. Underlying bedrocksection due to slope rock slope is given in conditions to confirm the safety of the slopeAngle or the most dangerous failure surface，Makes the complex rock mass structuretransformed the traditional problems of plane and wedge sliding，However，these needto consider the loads generated in the upper soil layer above the soil rock interface，and passed to the lower part of the bedrock of the slider. This method of analysis andcalculation is more scientific and reasonable than traditional single calculationmethod。 In rock slope stability analysis，This paper adopted the research for many yearsto study the structure of the random dynamic analysis method，According to1001survey data of Joint fissure and surface structure analysis invading combination withthe proposed excavation slope，According to Result，rock slope has not yet saw thedestruction of a typical single-slip surface unfavorable combination，But there areadverse combination of wedge，In different segments of its safety slope angle ofslope，Most likely burst Angle，for the most part， the rock mass in between55°and45°，Then according to the condition of safe slope Angle for the slope excavationafter the stability evaluation。in addition，Impact of the proposed site area of land near the red line andunderground pipelines significantly affected Resulting in the slope of the field area tobuild space is very limited，Program will bring difficulties to slope excavation andsupport design；When the safety factor can not meet the security level for the level ofslope safety reserve requirements， Slope needs to be designed to support orreinforcement。then comprehensive compare all kinds of related information andcontent of the programGive the optimal design。Be under the prerequisite to ensurethe safety of slope，economy，beautiful environment and easy installation.