CAJ | 학술논문

边坡开挖是工程中经常遇到的问题.在清华大学土工离心机上,开发了一种离心机运转过程中的边坡开挖模拟技术.进行了土坡开挖的离心模型试验,测量了开挖过程中边坡的位移场变化.结果表明,边坡的破坏过程是从坡体下部开始的剪切带逐渐向上发展贯通的过程,并经历了滑裂面贯通前的平缓变形和贯通后变形迅速增大两个阶段.坡顶裂缝最初均是由受拉引起的,但随着剪切带的不断向上发展,裂缝的扩展是由拉伸和剪切两种作用综合引起的.
변파개알시공정중경상우도적문제.재청화대학토공리심궤상,개발료일충리심궤운전과정중적변파개알모의기술.진행료토파개알적리심모형시험,측량료개알과정중변파적위이장변화.결과표명,변파적파배과정시종파체하부개시적전절대축점향상발전관통적과정,병경력료활렬면관통전적평완변형화관통후변형신속증대량개계단.파정렬봉최초균시유수랍인기적,단수착전절대적불단향상발전,렬봉적확전시유랍신화전절량충작용종합인기적.
Based on the centrifuge of Tsinghua University,a new device was developed to conduct the excavation of a slope in flight.The centrifuge model test was conducted to simulate the excavation of a cohesive slope.The displacement field was measured during the excavation.The results show that the failure process of the slope begins at the bottom of the slope and extends to the top eventually,including two stages:small deformation stage and rapidly increasing deformation stage.Cracks occurred in the top due to tension,however,their extension can be attributed to the cooperation of tension and shear along with the shear zone.