日新桥（Nhat Tan Bridge,见图1）位于越南河内市2号环线上,横跨红河,是一座6跨连续组合梁斜拉桥,主桥长1 500m,跨径布置为（150＋4×300＋150）m。该桥上部结构为钢边梁＋预制RC桥面板的组合结构,采用极限状态设计法设计。桥面宽35...日新桥（Nhat Tan Bridge,见图1）位于越南河内市2号环线上,横跨红河,是一座6跨连续组合梁斜拉桥,主桥长1 500m,跨径布置为（150＋4×300＋150）m。该桥上部结构为钢边梁＋预制RC桥面板的组合结构,采用极限状态设计法设计。桥面宽35.6m,布置双向8车道。5座桥塔均为RC结构,高106.31~108.56 m。塔上布置11对扇形斜拉索,斜拉索由121~313根7mm的平行钢丝组成,抗拉强度1 770 MPa,外套热挤PE防护,在斜拉索索套表面布设圆形凹点以防雨振。展开更多
A new method is proposed for slope optimization design based on the limit curve method, where the slope is in the limit equilibrium state when the limit slope curve determined by the slip-line field theory and the slo...A new method is proposed for slope optimization design based on the limit curve method, where the slope is in the limit equilibrium state when the limit slope curve determined by the slip-line field theory and the slope intersect at the toe of the slope. Compared with the strength reduction (SR) method, finite element limit analysis method, and the SR method based on Davis algorithm, the new method is suitable for determining the slope stability and limit slope angle (LSA). The optimal slope shape is determined based on a series of slope heights and LSA values, which increases the LSA by 2.45°-11.14° and reduces an invalid overburden amount of rocks by 9.15%, compared with the space mechanics theory. The proposed method gives the objective quantification index of instability criterion, and results in a significant engineering economy.展开更多
基金Project(JJKH20180450KJ)supported by Education Department of Jilin Province,ChinaProject(20166008)supported by the Science and Technology Bureau of Jilin Province,China
文摘A new method is proposed for slope optimization design based on the limit curve method, where the slope is in the limit equilibrium state when the limit slope curve determined by the slip-line field theory and the slope intersect at the toe of the slope. Compared with the strength reduction (SR) method, finite element limit analysis method, and the SR method based on Davis algorithm, the new method is suitable for determining the slope stability and limit slope angle (LSA). The optimal slope shape is determined based on a series of slope heights and LSA values, which increases the LSA by 2.45°-11.14° and reduces an invalid overburden amount of rocks by 9.15%, compared with the space mechanics theory. The proposed method gives the objective quantification index of instability criterion, and results in a significant engineering economy.
