Statistically Analysis for the Stability of Various Protection Modes of Expansive Soil Cutting Slope

2019 ◽  
Author(s):  
Shengting Li ◽  
Lijian Wu ◽  
Xiaolin Bian ◽  
Changjun Song ◽  
Pen Li ◽  
...  
Keyword(s):  
Expansive Soil ◽  
Cutting Slope ◽  
Soil Cutting ◽  
The Stability

Numerical Simulation and Design Optimization of Anchor Bolt-Sash Girder Support for Expansive Soil Cutting Slope

2015 ◽  
Vol 744-746 ◽  
pp. 547-550
Author(s):  
Hong Zhang ◽  
Guo Jun Sheng ◽  
Wen Qing Wu
Keyword(s):  
Numerical Simulation ◽  
Design Optimization ◽  
Expansive Soil ◽  
Original Design ◽  
Cutting Slope ◽  
Calculation Results ◽  
Soil Cutting ◽  
Anchor Bolts ◽  
The Stability ◽  
Vertical Spacing

The reinforcement of expansive soil cutting slope has been a difficulty for the construction industry. This study selected Wanyi Expressway as the construction background and used finite difference method for the numerical simulation and design optimization of expansive soil cutting slope reinforced by sash girder anchor bolts. Calculation results show that the cutting slope ratio is closely related to the stability of the expansive soil cutting slope and that the length, set angle, and vertical spacing of the anchor bolts significantly influence the deformation of the cutting slope. The original design plan was optimized according to the calculation results, and a positive effect in plan execution was achieved. This study may serve as a reference for other similar construction designs.

scholarly journals Surficial Failure of Expansive Soil Cutting Slope and Its Flexible Support Treatment Technology

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Jie Xiao ◽  
He-ping Yang ◽  
Jun-hui Zhang ◽  
Xian-yuan Tang
Keyword(s):  
Shear Strength ◽  
Expansive Soil ◽  
Treatment Technology ◽  
Flexible Support ◽  
Cutting Slope ◽  
Soil Cutting ◽  
The Stability ◽  
Vital Factor ◽  
Support Treatment ◽  
Drained Shear Strength

The surficial failure of most expansive soil cutting slopes, subjected to the repeated wet-dry cycles, often occurs during or after rainfall following a long drought. The reason for this, however, is still unclear. Therefore, the laboratory tests were conducted to gain the saturated drained shear strength of the natural Nanning expansive soil considering the combined effects of swelling with loading and wet-dry cycles. The findings indicate that the envelope of shear strength, which significantly drops close or equal to zero, can be well fitted by the generalized power function. At the same time, the effect of shear strength parameters on the stability of the expansive soil cutting slope was investigated. The reasons for the shear strength attenuation of the natural expansive soil and the surficial failure of the expansive soil cutting slopes were analyzed. It is evident that the effective cohesion being small is a vital factor influencing the occurrence of surficial failure of an expansion soil slope. Moreover, an effective flexible support treatment measure was provided.

Analysis on Stability of the Expensive Soil Cutting Slope Based on ANSYS

2013 ◽  
Vol 405-408 ◽  
pp. 299-303
Author(s):  
Bo Tan ◽  
Rui Zhang ◽  
Yan Ting Lai
Keyword(s):  
Expansive Soil ◽  
Analysis Method ◽  
Slope Analysis ◽  
Cutting Slope ◽  
Shear Strength Reduction Method ◽  
Earth Slope ◽  
Soil Cutting ◽  
Mechanism Of Landslide ◽  
Serious Disease ◽  
Shear Strength Reduction

Landslide of expansive soil slope is a serious disease and difficult to correct in highway construction. And the mechanism of landslide of expensive soil cutting slope is complex, so the traditional slope analysis method is unable to analyze it to obtain the reasonable explanation. But the numeric analytic method can obtain the stress, strain and plastic zone of side slope analysis the distortion process of earth slope and the latent sliding plane reasonably, adopt the safety factors to evaluate the slope stability, The paper based on ANSYS and adopts the nonlinear and elastoplasticity model of soil, and use the theory of the shear strength reduction method with FEM to analysis the rule of NanYou road expansive soil landslide. Keywords:Expensive soil landslide of cutting slope swelling force FEM

scholarly journals Experimental Study on Dynamic Resilient Modulus of Lime-Treated Expansive Soil

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Zheng Lu ◽  
Yang Zhao ◽  
Shaohua Xian ◽  
Hailin Yao
Keyword(s):  
Moisture Content ◽  
Environmental Changes ◽  
Resilient Modulus ◽  
Expansive Soils ◽  
Expansive Soil ◽  
Confining Pressure ◽  
Triaxial Tests ◽  
The Stability ◽  
Compaction Degree

Dynamic resilient modulus is the design index of highway subgrade design code in China, which is significantly affected by the traffic loads and environmental changes. In this study, dynamic triaxial tests were conducted to investigate the influence of moisture content, compaction degree, cyclic deviator stress, and confining pressure on lime-treated expansive soil. The suitability of UT-Austin model to lime-treated expansive soils was verified. The results indicate that the dynamic resilient modulus of lime-treated expansive soils increases nonlinearly with the increase of compaction degree, while decreases nonlinearly with the increase of dynamic stress level. The dynamic resilient modulus decreases linearly with the increase of moisture content and increases linearly with the increase of confining pressure. Moreover, the moisture content has a more significant effect on the dynamic resilient modulus of lime-treated expansive soil. Therefore, it is necessary to ensure the stability of soil humidity state and its excellent mechanical properties under long-term cyclic loading for the course of subgrade filling and service. Finally, the calculated results of the UT-Austin model for dynamic resilient modulus show a good agreement with the test results.

Dynamic response and mechanical deformation properties of the soil cutting slope under train cyclic loads

2020 ◽  
Vol 13 (14) ◽  
Author(s):  
Qiang Xie ◽  
Zhi-hui Wu ◽  
Chun-bo He ◽  
Jie Dong ◽  
Zhi-lin Cao ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Mechanical Deformation ◽  
Cyclic Loads ◽  
Cutting Slope ◽  
Deformation Properties ◽  
Soil Cutting

scholarly journals Effect of Grouted Granular Column on the Load Carrying Capacity of the Expansive soil

2019 ◽  
Vol 8 (3) ◽  
pp. 2606-2612
Keyword(s):  
Carrying Capacity ◽  
Urban Areas ◽  
Expansive Soil ◽  
Engineering Properties ◽  
Load Carrying Capacity ◽  
Loose Soil ◽  
Load Carrying ◽  
The Stability ◽  
Lateral Reinforcement ◽  
Granular Column

Due to the scarcity of land for the construction of industrial, commercial, and transportation structures for development in urban areas, it is very necessary to use the places which have weak strata. This has become very mandatory to use the land which has poor engineering properties due to the unavailability of land. In the recent years granular columns have come under the extensive use for increasing the load carrying capacity and reducing the settlement in the expansive soil and loose sand. Nowadays to increase the stability of the foundation, granular columns are being widely used. Traditional columns are driven into the weak expansive soil stratum and maintain its stability from lateral confinement, which is generally due to the reaction from the surrounding stiffened expansive soil. However, this is not so easy to support loose soil, an additional lateral support may have to be provided to stabilize it and reduce its settlements. This study aims to overcome this weakness in soil by wrapping the granular column in geotextile layer to enhance the lateral reinforcement. In the present paper the discussion is about the variation in load carrying capacity and settlement characteristics of granular column (made up of cement fly ash and sand in a definite proportion instead of aggregates and stones) and analyzing its effect on the expansive soil by comparing its results with geotextile encased columns. In this process the study investigates the improvement of load carrying capacity of a single granular column encased with geotextile through model test.

Stability Analysis and Treatment Design of Meng Dumei Landslide

2013 ◽  
Vol 405-408 ◽  
pp. 554-557
Author(s):  
Yu Fei Ma ◽  
Jian Ping Chen ◽  
Wen Zhang ◽  
Hong Zhi Niu ◽  
Peng Xu ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Stable State ◽  
Jilin Province ◽  
Geological Disasters ◽  
Cutting Slope ◽  
Counter Pressure ◽  
The Stability ◽  
Treatment Design

The landslide is one of common geological disasters, and it brought about enormous damages to the society. Taking Meng Dumei landslide in Jilin Province for example, cutting slope and filling earth counter pressure were applied in the landslide treatment based on the stability analysis in GeoStudio. The results shows that the landslide is under stable state when the thickness of cutting slope is 28m. This method was shown to be effective and economic on the premise of safety.

Stability Analysis and Evaluation of QingXi High-Cutting Slope

2013 ◽  
Vol 438-439 ◽  
pp. 1376-1379
Author(s):  
Jian Ping He ◽  
Ya Li Wang
Keyword(s):  
Slope Stability ◽  
Rock Slope ◽  
Stereographic Projection ◽  
Spatial Association ◽  
Control Measures ◽  
Decisive Factor ◽  
Joint Surface ◽  
Geological Body ◽  
Cutting Slope ◽  
The Stability

Rock nature is mainly controlled by joint-fissur, the stability of rock slope is mainly controlled by the joint surface, the destruction of the slope caused wedge instability formed by joint plane cutting. Stereographic projection can analyze simply and intuitively spatial association relations of straight line and plane in geological body, judge high-cutting slope stability and decisive factor of judge stability of high-cutting slope by means of direction and tendency relationship of rock slope and structural plane. This paper uses stereographic projection to analyze and judge high-cutting slope stability formed by artificial mechanical excavation in Qingxi, and decisive factor of stability according to deformation and fracture and the trends in the high-cutting slope regional, puts forward the high-cutting slope control measures and methods to ensure slope stability and security.

Sign in / Sign up

Export Citation Format

Share Document