The Experts below are selected from a list of 36 Experts worldwide ranked by ideXlab platform
Shitong Song - One of the best experts on this subject based on the ideXlab platform.
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centrifuge model tests of Basal Reinforcement effects on geosynthetic reinforced pile supported embankment
GeoShanghai International Conference, 2018Co-Authors: Chao Xu, Di Wu, Shitong SongAbstract:As an effective and economical structure, geosynthetic-reinforced pile-supported (GRPS) embankment has been used in the construction of roadbed of railway and highway in soft soil area. Its key load transfer mechanism includes the soil arching effect of the embankment fill and the tensioned membrane effect of Reinforcement in the mattress. Via these two effects, more embankment load is carried by piles, and the total settlement and differential settlement of the roadbed can be under control. Four centrifuge model tests were conducted to study the Reinforcement effect of geosynthetic on embankment stability and pile efficacy. The following results are achieved: the surface settlement and differential settlement of embankment could be effectively reduced through appropriate setting of reinforced mattress; Basal Reinforcement increased the pile efficacy and was affected by the number of Reinforcement layers; The tensile force of geogrid below the embankment shoulder was larger than that near the road center because of the lateral restraint of Basal Reinforcement.
Yeshuang Xu - One of the best experts on this subject based on the ideXlab platform.
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evaluation of effect of Basal geotextile Reinforcement under embankment loading on soft marine deposits
Geotextiles and Geomembranes, 2015Co-Authors: Ning Zhang, Shuilong Shen, Huaina Wu, Junchun Chai, Yeshuang XuAbstract:Abstract This paper presents a case history on the performance of a coastal embankment reinforced by a layer of geotextile at the bottom of the embankment on soft marine deposits. The coastal embankment is the sea wall of the Qinshan nuclear power station on the northern side of Hangzhou bay near Shanghai, China. Monitoring of settlement and excess pore water pressure were carried out during and after embankment construction. The finite element method (FEM) was used to analyse the performance of the geotextile Reinforcement and its effect on soil behaviour under the embankment loading, based on the field monitored results. Stability analyses were conducted using two approaches: c-ϕ reduction in FEM, and limit equilibrium analysis. Both field and simulation results indicate that the geotextile has an effect on reducing the vertical displacements of subsoil. However, the results show Basal Reinforcement cannot increase the overall factor of safety, but the factor of safety at the local position, under Reinforcement, can be increased during the construction procedure, and this is due to the confinement of the soil element by the reinforcing fabric. Thus, in these circumstances, one layer of Basal geotextile Reinforcement can prevent sudden failure of subsoil during embankment construction.
Chao Xu - One of the best experts on this subject based on the ideXlab platform.
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centrifuge model tests of Basal Reinforcement effects on geosynthetic reinforced pile supported embankment
GeoShanghai International Conference, 2018Co-Authors: Chao Xu, Di Wu, Shitong SongAbstract:As an effective and economical structure, geosynthetic-reinforced pile-supported (GRPS) embankment has been used in the construction of roadbed of railway and highway in soft soil area. Its key load transfer mechanism includes the soil arching effect of the embankment fill and the tensioned membrane effect of Reinforcement in the mattress. Via these two effects, more embankment load is carried by piles, and the total settlement and differential settlement of the roadbed can be under control. Four centrifuge model tests were conducted to study the Reinforcement effect of geosynthetic on embankment stability and pile efficacy. The following results are achieved: the surface settlement and differential settlement of embankment could be effectively reduced through appropriate setting of reinforced mattress; Basal Reinforcement increased the pile efficacy and was affected by the number of Reinforcement layers; The tensile force of geogrid below the embankment shoulder was larger than that near the road center because of the lateral restraint of Basal Reinforcement.
Robert W Sarsby - One of the best experts on this subject based on the ideXlab platform.
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use of limited life geotextiles llgs for Basal Reinforcement of embankments built on soft clay
Geotextiles and Geomembranes, 2007Co-Authors: Robert W SarsbyAbstract:Abstract Polymeric technical fabrics have long working lives and are sometimes used in practical situations where a geosynthetic is only needed to be fully functional for a relatively short period of time, e.g. a separator layer beneath a temporary access road. This article concerns the use of ‘Limited Life Geotextiles’ (LLGs), i.e. high specification geotextiles, which are designed on the basis of having a limited working life, as Basal Reinforcement for an embankment built on soft clay. A method is given for defining the allowable progressive loss of tensile strength of the foregoing Basal LLG as a result of improvement of the shear strength of the foundation soil due to consolidation. It is shown that the derived relation between required Reinforcement strength and consolidation time (the Time-Strength-Envelope) can be represented by a simple exponential equation. Vegetable fibres are natural candidates for use in the manufacture of LLGs since they are a renewable resource and their degradation with time is accounted for in the design of the LLG. Combinations of vegetable fibres growing in tropical regions which are capable of satisfying the Time-Strength-Envelopes for several embankment slopes are presented.
Ning Zhang - One of the best experts on this subject based on the ideXlab platform.
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evaluation of effect of Basal geotextile Reinforcement under embankment loading on soft marine deposits
Geotextiles and Geomembranes, 2015Co-Authors: Ning Zhang, Shuilong Shen, Huaina Wu, Junchun Chai, Yeshuang XuAbstract:Abstract This paper presents a case history on the performance of a coastal embankment reinforced by a layer of geotextile at the bottom of the embankment on soft marine deposits. The coastal embankment is the sea wall of the Qinshan nuclear power station on the northern side of Hangzhou bay near Shanghai, China. Monitoring of settlement and excess pore water pressure were carried out during and after embankment construction. The finite element method (FEM) was used to analyse the performance of the geotextile Reinforcement and its effect on soil behaviour under the embankment loading, based on the field monitored results. Stability analyses were conducted using two approaches: c-ϕ reduction in FEM, and limit equilibrium analysis. Both field and simulation results indicate that the geotextile has an effect on reducing the vertical displacements of subsoil. However, the results show Basal Reinforcement cannot increase the overall factor of safety, but the factor of safety at the local position, under Reinforcement, can be increased during the construction procedure, and this is due to the confinement of the soil element by the reinforcing fabric. Thus, in these circumstances, one layer of Basal geotextile Reinforcement can prevent sudden failure of subsoil during embankment construction.