EVALUATION OF PERFORMANCE REINFORCED SOIL RETAINING WALL WITH OBLIQUE REINFORCEMENTS, SLOPE FACING AND REINFORCEMENTS ANCHOR

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SHABANI RAMENETI M.J.; ROWSHANZAMIR M.A.; ESLAMI HAGHIGHAT A.

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Journal: Modares Civil Engineering journal Year:2016 | Volume:16 | Issue:1 Page(s): 55-67

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Title

EVALUATION OF PERFORMANCE REINFORCED SOIL RETAINING WALL WITH OBLIQUE REINFORCEMENTS, SLOPE FACING AND REINFORCEMENTS ANCHOR

Author(s)

SHABANI RAMENETI M.J. | ROWSHANZAMIR M.A. | ESLAMI HAGHIGHAT A. | Issue Writer Certificate

Keywords

REINFORCED SOILQ2

OBLIQUE REINFORCEMENTSQ2

SLOPE FACINGQ2

REINFORCEMENTS ANCHORQ2

Abstract

Soil improvement techniques are mostly consisted of 5 groups including chemical, physical, mechanical, biological and electrical methods. Materials such as lime, cement, coal ash, enzymes and some type polymers are used for chemical stabilization, while geogrides, geotextiles, metal bars and polymer fibers are used to improve soil performance as the physical methods known as soil reinforcement. Several techniques have been used for soil reinforcement. In 1966, Vidal first used galvanized steel strips to improve the properties of cohesionless soils. Since then, numerous reinforced earth structures have been constructed throughout the world. One of the REINFORCED SOIL applications is the construction of REINFORCED SOIL retaining walls. Due to the advantages of REINFORCED SOIL retaining walls, the usage of such walls in civil engineering projects has shown an increasing trend over the past three decades. Nevertheless, more studies seem necessary to achieve optimal designs for such walls. The use of REINFORCED SOIL in strengthening foundations to bear and designing earth retaining structures is a method widely used in recent years. On the base of the studies done and comparison of different criteria in various retaining walls, it has become clear that the use of earth walls reinforced with geosynthetic is prior to other kinds of walls practically and economically. In this research study, an attempt was made to investigate the effect of tilted face, OBLIQUE REINFORCEMENTS as well as anchorage of the end side of reinforcements on the performance of retaining wall using laboratory scale wall models. In this context, 14 models of the walls were constructed and their performance was determined under static loading. The models of retaining walls were built in a flexible laminar box to considerably reduce the boundary effects. Model retaining walls were constructed in the laminar box to a size of 60 cm×39 cm in plan and 60 cm deep. Locally available dry sand is used as the backfill material. The sand is classified as poorly graded sand with letter symbols SP as per the Unified Soil Classification System. The model walls are reinforced with geogrid layers. According to FHWA (2001), the length of reinforcements chosen is equal to 0.7H. In case of rigid-faced walls, the facing is constructed from 25 hollow rectangular wood box sections of 4 cm height and 5 cm width. On the base of the observed results, horizontal deformation of wall face is compared with the state of horizontal block to determine the optimum angle at which less deformation appears in wall face. The experimental results provided enough evidence that horizontal deformation of the wall face decreased with tilting it towards backfill. Moreover, using OBLIQUE REINFORCEMENTS caused more reduction in the wall horizontal deformations. As a typical case, it was found that the REINFORCED SOIL wall model with OBLIQUE REINFORCEMENTS of 10 degree and sloped face of 80 degree provided a 20% reduction in the maximum horizontal deformation of the wall model. Such a result may be considered as significant improvement in the wall performance. Moreover, the anchorage of end side of reinforcements within backfill presented beneficial but limited effects on the wall performance.

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APA: Copy

SHABANI RAMENETI, M.J., ROWSHANZAMIR, M.A., & ESLAMI HAGHIGHAT, A.. (2016). EVALUATION OF PERFORMANCE REINFORCED SOIL RETAINING WALL WITH OBLIQUE REINFORCEMENTS, SLOPE FACING AND REINFORCEMENTS ANCHOR. MODARES CIVIL ENGINEERING JOURNAL, 16(1), 55-67. SID. https://sid.ir/paper/256734/en

Vancouver: Copy

SHABANI RAMENETI M.J., ROWSHANZAMIR M.A., ESLAMI HAGHIGHAT A.. EVALUATION OF PERFORMANCE REINFORCED SOIL RETAINING WALL WITH OBLIQUE REINFORCEMENTS, SLOPE FACING AND REINFORCEMENTS ANCHOR. MODARES CIVIL ENGINEERING JOURNAL[Internet]. 2016;16(1):55-67. Available from: https://sid.ir/paper/256734/en

IEEE: Copy

M.J. SHABANI RAMENETI, M.A. ROWSHANZAMIR, and A. ESLAMI HAGHIGHAT, “EVALUATION OF PERFORMANCE REINFORCED SOIL RETAINING WALL WITH OBLIQUE REINFORCEMENTS, SLOPE FACING AND REINFORCEMENTS ANCHOR,” MODARES CIVIL ENGINEERING JOURNAL, vol. 16, no. 1, pp. 55–67, 2016, [Online]. Available: https://sid.ir/paper/256734/en

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