Anisotropic spatial variability of soil properties is frequently encountered in geotechnical engineering practice due to the complex depositional process. To quantitatively evaluate response slope failure related anisotropic and reveal underlying influence on reliability, this study integrates random finite difference method (RFDM) into a probabilistic assessment framework adopts general cohesive-frictional example for illustration. A parametric analysis carried out investigate probability...

Strong ultraviolet light and low‐temperature are the typical environmental characteristics in high‐altitude areas. The performance of SBS‐modified asphalt above needs further study. To improve resistance (UV) ageing copolymer‐ (SBS‐) modified asphalt, an containing nano‐ZnO nano‐TiO 2 is proposed. In this paper, nano‐ZnO, , SBS were used as modifiers with silane coupling agent (KH‐560) nanomaterial surface modification. orthogonal test table was to analyse effects three on physical...

To investigate the influences of reservoir water level drawdown on slope stability, a series numerical simulations were carried out to examine impacts angle, permeability and speed pore pressure (PWP) change during seepage, as well factor safety (Fs) slope. Based results, an estimation model relating influential factors mentioned above was developed. The expression indicates that there are interaction effects between permeability, with regard stability. Furthermore, in view uncertainty...

Generation of particles with irregular shape and the overlap detection are crucial for numerical simulation granular materials. This paper presents a systematic approach to develop two-dimensional random particle model Firstly, angular bend (RAB) algorithm is proposed coded in Python simulate geometric individual shape. Three representative parameters used quantitatively control feature generated polygons terms three major aspects, respectively. Then, geometrical models implemented into flow...

Abstract Geo‐materials are generally regarded as multi‐phase structural systems, which composed of particles, pores, and fissures. Generally, the shape size particles have considerable influence on physical mechanical properties geo‐materials. Based theory random angular bend (RAB) algorithm, this paper presented a method to finely generate three‐dimensional (3D) particle model via superposition two‐dimensional (2D) profiles, proposed was coded in Python. According generation procedure,...

Residual soils referring to the weathered from rocks widely exist all over world especially in tropical regions. This paper presents a comprehensive study on variability and estimation of compressibility Bukit Timah Granitic (BTG) residual Singapore using database about 178 Oedometer tests site investigation. The statistical analysis shows that data four sites BTG formation are no distinct difference their distribution approximately follow lognormal type. According established transformation...

The study of landslide dynamic characteristics and accumulation patterns is great significance for the quantitative evaluation hazards. This paper takes Tangjiashan as a research case, real 3D model was established based on high precision DEM data to determinate terrain pre- postlandslide image shape size sliding body. Particle flow program (PFC3D) carried out reappear complete movement landslide. And characteristic factors are monitored analyzed such velocity displacement result shows that...

Analyzed the particularity of TBM work environment and superiority virtual instrument for condition monitoring, built a instrument-based monitoring systems. Researched collected method certainty feature vectors based on wavelet packet transform, verified applicability this approach. A combination diagnostic methods transform BP neural network fault diagnosis was proposed. In process applying method, presented to adjust weights netwoek by second learning influent oefficient weighting method....

Due to its outstanding contributions in overcoming the device limitations traditional experiment process, as well improving practice and operation capacity of students, virtual has become an indispensable part E-learning, been widely applied during recent years. As one supportive components experiment, marking system provides open platform for results evaluation, which could greatly improve efficiency teaching learning process by replacing manually with automatic operations. In this paper,...

In order to investigate the relationship between strains of slope body and its factor safety, numerical model was built via finite difference software-FLAC. By applying a gradually increasing load on top slopes with different heights, were numerically recorded until failure state. The results indicated that linear strain mutation along potential sliding surface can be used as criterion for failure. addition, this paper presented progressive progress during which factors safety corresponding...

A non-road diesel engine meeting China IV emission regulation was selected, the RMC and NRSC test procedures of EU Stage V were run on bench. The emissions particle number (PN) with sizes above 23 nm 10 tested simultaneously using direct exhaust sampling full-flow dilution channel CVS equipment. results showed that characteristics particulate matter in had same trend, cumulative PN 1.9×1012 2.3×1012 for whole cycle, respectively. PN23 values higher than those sampling. main reason difference...