【摘要】：結(jié)構(gòu)面是巖質(zhì)邊坡穩(wěn)定性的控制性因素,其可在坡體中組合形成潛在失穩(wěn)塊體,基于塊體理論和運(yùn)動學(xué)分析可搜索確定塊體邊界,但塊體邊界的正確性及巖塊穩(wěn)定性計(jì)算結(jié)果的準(zhǔn)確性取決于地形的精確性。本文以實(shí)際工程邊坡為例,基于等高線數(shù)據(jù),采用Siemens Unigrphics NX10.0軟件參數(shù)化方法建立了精細(xì)地形模型,進(jìn)一步運(yùn)用Auto CAD搜索了潛在失穩(wěn)塊體,并計(jì)算了塊體穩(wěn)定性系數(shù)。結(jié)果表明:巖層產(chǎn)狀(3)、(4)可能在局部區(qū)域形成了獨(dú)立塊體,若組合同傾向陡傾結(jié)構(gòu)面,則形成獨(dú)立塊體的可能性大增;若產(chǎn)狀(3)傾角增大,則形成塊體的可能性降低。各種塊體的穩(wěn)定性均滿足設(shè)計(jì)要求,僅在施工擾動結(jié)構(gòu)面粘聚力完全喪失的條件下,局部塊體的安全系數(shù)略低于設(shè)計(jì)值。因此,建議在施工中保護(hù)好結(jié)構(gòu)面粘聚力。
[Abstract]:Structural plane is the controlling factor of rock slope stability, and it can form potential unstable block in slope body. Based on block theory and kinematic analysis, block boundary can be determined by searching. However, the correctness of the block boundary and the accuracy of the stability of the rock block depend on the accuracy of the terrain. Taking the actual slope as an example, based on contour data, a fine terrain model is established by using Siemens Unigrphics NX10.0 software parameterization method, and the potential unstable block is further searched by Auto CAD, and the block stability coefficient is calculated. The results show that the occurrence of rock formation (3), (4) may form independent block in the local area, and the possibility of forming independent block is greatly increased if the formation contract tends to steep inclined structural plane. If the dip angle of occurrence (3) increases, the possibility of forming block decreases. The stability of all kinds of blocks satisfies the design requirements, and the safety factor of local blocks is slightly lower than the design value only when the cohesive force of the construction disturbed structural surface is completely lost. Therefore, it is suggested to protect the cohesive force of structural surface in construction.
【作者單位】： 四川電力設(shè)計(jì)咨詢有限責(zé)任公司;西南交通大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金(51178402) 國家重點(diǎn)研發(fā)計(jì)劃重點(diǎn)專項(xiàng)(2016YFC0802200)
【分類號】：TU457

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