Reinforcement of pit bottom soil has been utilized in subway deep foundation-pit engineering soft-soil areas. This study proposes an improved excavation model to better investigate the effect reinforcement at a on deformation subway’s foundation pits. The strength parameters reinforced could be obtained through cone penetration test before and after pit-bottom-soil reinforcement. results show t...

Article history: Received: 14.5.2014. Received in revised form: 20.1.2015. Accepted: 14.5.2015. In order to determine the deformation capacity of reinforced concrete composite shear wall with concealed bracings at different performance levels, some previous research of domestic scholars are reviewed by analyzing 89 shear wall specimens using a performance-based seismic design method. The perfor...

during past earthquakes, many instances of building damage as a result of earthquake surface fault rupture have been observed. the results of investigating a potential mitigation scheme are presented in this paper. such plan provides a wall in the soil with the aim of surface displacement localization in the narrow pre-determined location. this may reduce the risk of the future rupture downstre...

Electro-thermo-elastic stress analysis of piezoelectric polymeric thick-walled cylinder reinforced by boronnitride nanotubes (BNNTs) subjected to electro-thermo-mechanical fields is presented in this article. The electro-thermo-elastic properties of piezoelectric fiber reinforced composite (PEFRC) was studied by a modified XY micromechanical model capable of exhibiting full coupling relati...

In order to further explore the influence of reinforcement materials laying position on dynamic characteristics reinforced retaining walls, based FLAC3D finite difference methods for solving nonlinear problems, established with same size wall in practical engineering, material’s relative normalized processing, under seismic load, and panel conditions different arrangement were analyzed, horizon...

The research on damages of structures that are supported by deep foundations has been quite intensive in the past decade. Kinematic interaction in soil-pile interaction is evaluated based on the p-y curve approach. Existing p-y curves have considered the effects of relative density on soil-pile interaction in sandy soil. The roughness influence of the surface wall pile on p-y curves has not bee...

As a new type of reinforced material, geocells are widely used in flexible retaining wall projects, and lot practical experience shows that the geocell has great effect on earthquake resistance, but theoretical research lags behind engineering practice, deformation failure mechanism under need to be further studied. In this paper, we use FLAC3D nonlinear, finite-difference method study geocell-...

With the growing population and density in metropolitan areas, higher tendency to live in high-rise buildings, and increasing demand for parking lots, it seems necessary to excavate soil to construct underground spaces. During excavation work, as the height of the wall increases, special care should be taken to the wall stabilization to avoid any consequent damage including extensive property d...