Study of Seismic Design Method for Slope Supporting Structure of Soil Nailing

2013 ◽  
Vol 353-356 ◽  
pp. 2073-2078
Author(s):  
Tian Zhong Ma ◽  
Yan Peng Zhu ◽  
Chun Jing Lai ◽  
De Ju Meng
Keyword(s):  
Seismic Design ◽  
Calculation Method ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Calculation Model ◽  
Soil Nailing ◽  
Case Record ◽  
Analysis And Design ◽  
Supporting Structure ◽  
Earthquake Action

Slope anchorage structure of soil nail is a kind of economic and effective flexible slope supporting structure. This structure at present is widely used in China. The supporting structure belong to permanent slope anchorage structure, so the design must consider earthquake action. Its methods of dynamical analysis and seismic design can not be found for the time being. The seismic design theory and method of traditional rigidity retaining wall have not competent for this new type of flexible supporting structure analysis and design. Because the acceleration along the slope height has amplification effect under horizontal earthquake action, errors should be induced in calculating earthquake earth pressure using the constant acceleration along the slope height. Considering the linear change of the acceleration along the slope height and unstable soil with the fortification intensity the influence of the peak acceleration, the earthquake earth pressure calculation formula is deduced. The soil nailing slope anchorage structure seismic dynamic calculation model is established and the analytical solutions are obtained. The seismic design and calculation method are given. Finally this method is applied to a case record for illustration of its capability. The results show that soil nailing slope anchorage structure has good aseismic performance, the calculation method of soil nailing slope anchorage structure seismic design is simple, practical, effective. The calculation model provides theory basis for the soil nailing slope anchorage structure of seismic design. Key words: soil nailing; slope; earthquake action; seismic design;

Study on Dynamic Calculation Method of Anti-Slide Pile

2014 ◽  
Vol 578-579 ◽  
pp. 402-406
Author(s):  
Tian Zhong Ma ◽  
Yan Peng Zhu
Keyword(s):  
Seismic Design ◽  
Analytical Solutions ◽  
Calculation Method ◽  
Seismic Analysis ◽  
Calculation Model ◽  
Dynamic Calculation ◽  
New Approach ◽  
Analysis And Design ◽  
Supporting Structure ◽  
Prestressed Anchor

A dynamic calculation model of the pile supporting structure with single prestressed anchor for the slope is proposed in this paper. The motion equation of the pile-prestressed anchor is established and the analytical solutions are obtained. In addition the proposed method is applied to a project case to carry out the seismic analysis and design of the pile supporting structure with single prestressed anchor. The calculation model provides a new approach for earthquake analysis and seismic design of slope supported by pile supporting structure with pre-stress anchor.

Study on Dynamic Calculation Method for Pile Supporting Structure with One Layer Prestressed Anchor

2011 ◽  
Vol 261-263 ◽  
pp. 1145-1150
Author(s):  
Yan Peng Zhu ◽  
Jian Hua Dong ◽  
Yong Zhou
Keyword(s):  
Seismic Design ◽  
Calculation Method ◽  
Seismic Analysis ◽  
Calculation Model ◽  
Response Analysis ◽  
Dynamic Calculation ◽  
Analysis And Design ◽  
Supporting Structure ◽  
Earthquake Response Analysis ◽  
Prestressed Anchor

A dynamic calculation model of the pile supporting structure with one layer prestressed anchor for the slope is proposed in this paper. The prestressed anchor is regarded as the elastic support of the pile body. According to the theory of one-dimension elastic wave propagation, the interaction between the pile and the soil is obtained. Then the motion equation of the pile-prestressed anchor is established based on the dynamic interaction. The analytical solutions are obtained. In addition the proposed method is applied to a project case to carry out the seismic analysis and design of the pile supporting structure with one layer prestressed anchor. The calculation method provides a theoretical basis for earthquake response analysis and seismic design of the pile supporting structure with one layer prestressed anchor.

Study of Seismic Design Method for Frame Supporting Structure with Prestressed Anchors

2011 ◽  
Vol 261-263 ◽  
pp. 1139-1144
Author(s):  
Jian Hua Dong ◽  
Wei Ma ◽  
Yan Peng Zhu
Keyword(s):  
Seismic Design ◽  
Design Method ◽  
Earth Pressure ◽  
Calculation Model ◽  
Dynamical Analysis ◽  
Dynamic Calculation ◽  
Engineering Project ◽  
Systematic Calculation ◽  
Supporting Structure ◽  
Seismic Design Method

Frame supporting structure with prestressed anchors is a new anchoring technology applied in slope reinforcement in recent years. Its dynamical analysis and seismic design is a big challenge, a set of systematic calculation methods can not be found for the time being. This paper shall first evaluate the calculation formula of anchoring slope earthquake earth pressure, then establish dynamic calculation model of frame supporting structure with prestressed anchors, solve using FORCE METHOD, finally apply the proposed method in engineering project. The result shows that this method is applicable to loess areas with uniform soil texture, providing the theoretical basis for seismic design of frame supporting with prestressed anchors.

Earthquake Earth Pressure Calculation Method of Clay Retaining Wall

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Yong Liu ◽  
Hongzhe Liu ◽  
Zhanyong Yao ◽  
Mingxia Shao ◽  
Yulong Zhao
Keyword(s):  
Calculation Method ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Pressure Calculation

Analysis Again for Earth Pressure Calculation Theory Considering Displacement Effects

2011 ◽  
Vol 368-373 ◽  
pp. 2755-2759
Author(s):  
Tai Hua Yang ◽  
Huai Jian He ◽  
Xiang Chao Gong
Keyword(s):  
Shear Strength ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Friction Angle ◽  
Calculation Model ◽  
Cohesionless Soils ◽  
Shear Strength Reduction Method ◽  
Pressure Calculation ◽  
Displacement Effects ◽  
Shear Strength Reduction

According to Moore-Coulomb strength theory, combined with the shear strength reduction method, assumed that the exerted value of the soil’s internal friction Angle and displacement were in nonlinear, and the exerted value of the soil’s cohesion and displacement were in linear, and then put forward a unified, continuous with displacement earth pressure calculation model, and this model could be used to calculate the active and passive earth pressure for cohesive soils and cohesionless soils in any nonlimited state and any movement mode. Through the analysis of the calculation model showed that: (1) The above assumptions were all reasonable from the two perspectives of the theoretical and the measuring; (2) The variation process of earth pressure acted on the retaining wall with displacement, could regard as the process of the soil’s shear strength parameters exerting gradually; (3) Given the physical meanings to the calculated parameters; (4) Analyzed the characteristics of the calculation model, and pointed out that there were calculation errors when the displacement of retaining wall was in (0, x0H) for the Rankine earth pressure theory.

Study on the Influence of Active Earth Pressure Caused by the Ditch behind Retaining Wall

2012 ◽  
Vol 204-208 ◽  
pp. 255-258
Author(s):  
Guang Qi Sheng ◽  
Ying Hui Chen ◽  
Fang Sun ◽  
Bo Wei ◽  
Yan Lian Pan
Keyword(s):  
Calculation Method ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Plane Boundary ◽  
Infinite Plane ◽  
Active Earth Pressure ◽  
Regular Pattern ◽  
Distributed Load ◽  
Uniformly Distributed Load

To study the influence of active earth pressure caused by the ditch after retaining wall, we will treat the ditch as unloading, and use the resolve of uniformly distributed load on half-infinite plane boundary to get the calculation method to get the influence of active earth pressure caused by the ditch after retaining wall. At last, from an example, we will get the picture of active earth pressure caused by the ditch after retaining wall, and analysis the regular pattern and characteristics.

Study on the Calculation Method of Earth Pressure on Retaining Wall in the Mode of Translation

2015 ◽  
Vol 1089 ◽  
pp. 292-298
Author(s):  
Zhi Xiong Zhang ◽  
Yong Gang Li ◽  
Chao Tian
Keyword(s):  
Calculation Method ◽  
Retaining Wall ◽  
Limit State ◽  
Earth Pressure ◽  
Friction Angle ◽  
Displacement Effect ◽  
Translational Movement ◽  
The Earth ◽  
Translational Displacement ◽  
Movement Effect

Focusing on rigid retaining wall under translation movement mode, the earth pressure under non-limit state considering translational movement effect is studied. Considering the translational displacement effect of internal friction angle of the backfill and the wall soil friction angle,we established the relation formula between internal and external friction angle and displacement and got strength and distribution of horizontal earth pressure, strength and the acting point of resultant force on retaining walls at any displacement in mode of translation. We also compare the calculation of earth pressure obtained by the calculation method proposed in this paper with the measured values of the model and found and they are on the whole the same.

Numerical Analysis of Composite Soil Nailing Retaining Wall under Earthquake

2013 ◽  
Vol 275-277 ◽  
pp. 1353-1358 ◽  
Author(s):  
Tian Zhong Ma ◽  
Yan Peng Zhu ◽  
De Ju Meng
Keyword(s):  
Finite Element ◽  
Retaining Wall ◽  
Time History ◽  
Horizontal Displacement ◽  
Element Model ◽  
Soil Nailing ◽  
Supporting Structure ◽  
Finite Element Software ◽  
Axial Forces ◽  
Composite Soil Nailing

The seismic response of slope supported by composite soil nailing is analyzed by using finite element software ADNIA, in which the EL-Centro wave is selected as input earthquake wave.The analytical contents include the displacement and acceleration of supporting slope, as well as the time history responses of the axial forces of anchors. In the establishment of finite element model, the interaction between soil body and supporting structure is considered. The elastic-plastic M-C model with nonlinear static and dynamic behavior is used to simulate the soil body, and the dual linear strengthen model is adopted to simulate the supporting structure, then the interaction between soil body and supporting structure is simulated with contact element. The results show that the composite soil nailing slope supporting structure has better seismic performance than the general soil nailing slope supporting structure. The maximum horizontal displacement of the latter occurs at the slope top, but that of the former occurs at the slope upper. Especially after the imposition of the prestress, the slope displacement under earthquake reduces significantly, and the axial forces of anchors under earthquake enlarge significantly. Moreover, the axial forces of anchors reach maximum values near the slipping surface. The displacement and the acceleration of slope increase along the slope height. The conclusions obtained provide basis for the seismic design of permanent supporting slope and reference for similar projects.

Calculation of Unlimited Passive Earth Pressure in the Model of RBT Movement

2011 ◽  
Vol 250-253 ◽  
pp. 1572-1577
Author(s):  
Tai Hua Yang ◽  
Huai Jian He
Keyword(s):  
Retaining Wall ◽  
Limit State ◽  
Earth Pressure ◽  
Friction Angle ◽  
Calculation Model ◽  
Total Force ◽  
Passive Earth Pressure ◽  
Maximum Displacement ◽  
Action Point ◽  
Room Model

Assuming the internal friction angle of backfill and the displacement are in nonlinear, to adopt the calculation model that was put forward by the author, combined with the in-room model experiment, to calculate and analyze the passive earth pressure acted on the retaining wall in the model of RBT movement. The analysis results show: the calculated values and the test values can agree with each other very well in the three ways of the distribution of earth pressure along the wall height, the values of the passive total force and its action point position. So it is feasible to use the calculation model to calculate the passive earth pressure in the model of RBT movement. Comparatively, when n = 0 the calculated values are the most identical with the test values, when n = 0.25 are worse, when n = 0.5 are the worst. Those may be relative to the sizes effect of the box of model test and the property of the interface between the soil and the plate at the bottom of model box. In addition, with the value of n increasing gradually, the maximum displacement needed to reach Rankine’s passive limit state will be decreased.

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