Papers by Author: Li Jun Suo

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Authors: Li Jun Suo, Huai Feng Tong
Abstract: In the paper, three–dimension finite element model of asphalt pavement, which includes transverse contraction joint of porous concrete base and asphalt surface, is established for the purpose of studying thermal stress of asphalt surface which is located in transverse contraction joint of porous concrete base. Calculation results of thermal stress are compared with each other. The results show that thermal stress of asphalt surface increases with increase of surface’s modulus, and thermal stress of asphalt surface increases with increase of ratio of base’s modulus to foundation’s modulus, and thermal stress of asphalt surface increases with increase of temperature field of base.
2488
Authors: Li Jun Suo, Bin Yang
Abstract: Thermal stress has been an important parameter used in the analysis of the new pavement design. For the purpose of studying the thermal stress for the asphalt pavement of lean concrete base, first of all, three–dimension finite element model of the asphalt pavement is established. The two main objectives of the paper are investigated. One is analysis for thermal stress of lean concrete base, and the other is analysis for thermal stress of asphalt surface. The results show that thermal stress of lean concrete base increases, decrease and increase with increase of base’s thickness, surface’s thickness and ratio of base’s modulus to foundation’s modulus respectively. So far as the asphalt surface is concerned, maximum shearing stress and maximum tensile stress, which are caused by temperature difference, are evident in asphalt surface which is located in transverse contraction joint of lean concrete base of asphalt pavement.
2418
Authors: Bin Yang, Li Jun Suo, Chun Ren Zhou, Kai Liang Dong
Abstract: With the goal of exploring the impact of pavement structure parameters on load stress of super-thick cement concrete pavement, this paper, based on the Quanxing freeway in Guangxi, analyzes the load stress in the situation of the separated type and combined type contact between the cement concrete slab and the lean concrete base by using three-dimensional finite element model. Computational results show that the variation of different pavement structure parameters have various impacts on the load stress of super-thick cement concrete pavement. The load stress σc1 of super-thick cement concrete pavement slab declines with the increase of slab thickness h1 and base thickness h2 and decreases with the reduction of slab length L and the increases of base modulus E2 and subbase modulus Et. Among them, the variation of slab thickness h1 has the greatest impact on the pavement load stress. Thus, there is a quite obvious effect in reducing the pavement load stress by increasing the slab thickness.
3254
Authors: Li Jun Suo, Xia Guang Hu
Abstract: In the field of asphalt pavement, the study has shown that porous concrete base has a good performance of drainage capacity. When porous concrete is used in asphalt pavement, problem of water damage for asphalt pavement can be settled effectively. Because of that, more and more porous concrete base have been applied to asphalt pavement construction in recent years. As a matter of fact, it is necessary to do mechanical analysis for asphalt surface, which is located in the middle of porous concrete base’s transverse contraction joint, in order to put forward theoretical basis for asphalt surface design. In the paper, three–dimension finite element model of asphalt pavement, which includes transverse contraction joint of porous concrete base and asphalt surface, is created for the aim of doing mechanical analysis of asphalt surface which is located in transverse contraction joint of porous concrete base. Based on numerical method, finite element software, such as ANSYS, is employed to do mechanical analysis for asphalt surface which is located in transverse contraction joint of porous concrete base of asphalt pavement. Mechanical analysis show that load stress is compressive stress, and maximum shearing stress, which is caused by load, is evident in asphalt surface which is located in transverse contraction joint of porous concrete base of asphalt pavement. Maximum shearing stress decrease, decrease, decrease and increase respectively with increase of the surface’s modulus, the surface’s thickness, base’s thickness and ratio of base’s modulus to foundation’s modulus. Meanwhile, maximum shearing stress, which is caused by thermal stress, increase and decrease respectively with increase of surface’s modulus and ratio of base’s modulus to foundation’s modulus.
757
Authors: Li Jun Suo, Xia Guang Hu
Abstract: In China, it is fact that porous concrete base has been used in the construction of asphalt pavement in recent years because porous concrete base has good performance. However, Reasonable design method has not been put forward so far. Therefore, it is necessary to analyze load stress and thermal stress of asphalt pavement which includes porous concrete base in order to put forward theoretical basis for pavement design method. In the paper, three–dimension finite element model of asphalt pavement, which includes porous concrete base and asphalt surface, is created for the purpose of studying load stress and thermal stress of porous concrete base in asphalt pavement. Based on numerical method of three–dimension finite element model, finite element software, such as ANSYS, is employed to study load stress and thermal stress of porous concrete base in asphalt pavement. After that, the effect of different factors on stress is studied, and the factors include thickness of surface, thickness of base and ratio of base’s modulus to foundation’s modulus. Finally, calculation results for stress are compared with each other, and it shows that load stress of porous concrete base decreases with increase of base’s thickness, while thermal stress of porous concrete base increases with increase of base’s thickness. Load stress and thermal stress of porous concrete base decrease with increase of surface’s thickness. Load stress and thermal stress of porous concrete base increase with increase of ratio of base’s modulus to foundation’s modulus.
751
Authors: Huai Feng Tong, Li Jun Suo
Abstract: On the basis of settlement analysis of small non-sand concrete pile composite foundation under the action of anaphase load, optimal design method of the post-processing technology for soft-foundation is researched on the basis of settlement control in this paper. Which provides theoretical basis for the design of small pile composite foundation.
2577
Authors: Huai Feng Tong, Li Jun Suo
Abstract: In the construction of thick filling area on expressway soft-foundation, the free pore water in the saturated foundation soil of expressway is seldom discharged immediately, and the excess pore water pressure comes into being, which lead to the delay of the process of soil consolidation, and the lag of stabilization time of settlement and time limit for a project. On the basis of settlement analysis of small non-sand concrete pile composite foundation under the action of anaphase load, optimal design method of the post-processing technology for soft-foundation is researched on the basis of settlement control in this paper. Which provides theoretical basis for the design of small pile composite foundation.
194
Authors: Li Jun Suo
Abstract: Load stress, which is caused by traffic loading, is important parameter used in the analysis of the new pavement design. In order to study the load stress of lean concrete base in the asphalt pavement, first of all, three–dimension finite element model of the asphalt pavement is established. The main objectives of the paper are investigated. One is calculation for load stress of lean concrete base, and the other is analysis for relationship between load stress of lean concrete base and parameters, such as thickness, modulus. The results show that load stress of lean concrete base decreases, decreases and increases with increase of base’s thickness, surface’s thickness and ratio of base’s modulus to foundation’s modulus respectively. So far as the traffic axle loading is concerned, it has a significant impact on load stress of lean concrete base, and it can be seen from results that when load is taken from 100kN to 220kN, load stress increases quickly with the increase of the traffic axle loading.
1495
Authors: Li Jun Suo
Abstract: In order to study the shearing stress of asphalt surface on lean concrete base, first of all, three–dimension finite element model of the asphalt pavement is established. The main objectives of the paper are investigated. One is calculation for shearing stress of asphalt surface in transverse contraction joint of lean concrete base, and the other is analysis for relationship between load stress of asphalt surface and parameters, such as thickness, modulus. The results show that maximum shearing stress, which is caused by load, is evident in asphalt surface which is located in transverse contraction joint of lean concrete base of asphalt pavement. Maximum shearing stress decrease, decrease, decrease and increase respectively with increase of the surface’s modulus, the surface’s thickness, base’s thickness and ratio of base’s modulus to foundation’s modulus.
1402
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