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The Prototype Measurement and the Numerical Analysis of a New Type Support Structure of High-fill Embankment

Author: WuZuoZuo
Tutor: YuTianQing
School: Hubei University of Technology
Course: Structural Engineering
Keywords: Retaining wall Prototype observation Finite Element Earth pressure
CLC: U416.12
Type: Master's thesis
Year: 2005
Downloads: 62
Quote: 0
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Abstract

The double-sided upright Mutual Anchoring Thin Retaining Wall Reinforced Retaining Wall a special form, it has a good technical and economic performance. However, analysis of the theoretical research and calculation on this structure is still in its infancy. In this paper, the prototype test and numerical analysis, lateral earth pressure acting on the retaining wall back size and its distribution pattern, the size and distribution of tensile stress in the tensile reinforcement law, the size and distribution of the foundation soil pressure law, embankment internal vertical to the size of the earth pressure distribution law, the impact of various parameters on the mechanical properties of the structure. The main work and conclusions are as follows: 1, a comprehensive exposition of the development and research of retaining structures; 2 by analyzing the results of the prototype observation results and numerical analysis, the following conclusions: (1) wall dorsal to the earth pressure curve shaped distribution , and top to bottom is gradually increased, and from the top of the wall is greater than or equal to 4m, the measured earth pressure value is greater than the calculated value of the theoretical approach. Filling inhomogeneity not only affects the size of the earth pressure to the wall of the dorsal, but also affect the distribution of soil pressure along the wall. (2) reinforced tensile stress the curvilinear distribution, and from top to bottom gradually increasing. The reinforced pull along the length direction of the reinforced appeared double peak phenomenon. (3) the point foundation soil pressure With on Futuhoudu increased and increased, and its value is less than the value of the foundation soil pressure calculated by the formula σ = gammaH. (4) embankment internal vertical earth pressure is nearly linear distribution, from top to bottom and gradually increased, only a large non-linear distribution within wall height 1m ~ 3m. Embankment internal vertical soil pressure wall height within the range of 3m by the formula σ = γh calculated theoretical value is closer, in the wall height is less than 3m within less than the theoretical value = Γh calculated to using the formula σ. (5) increase the modulus of elasticity of the main embankment filler or basic filler can significantly improve the performance of the force of the retaining wall structure. Improve basic filler cohesion C values ??of the structure under performance improvement, but when the value is greater than C 15KPa this improvement is not obvious. (6) presence of pre-tensile stress tensile stress in the tensile reinforcement will be significantly increased, but this effect is local. (7) to increase or reduce the bar diameter causes the corresponding to the earth pressure on the tensile stress of the tensile reinforcement and the corresponding wall dorsal reduced or increased, and the the corresponding reinforced near Jigen reinforcement tensile stress and the corresponding wall dorsal to the earth pressure will decrease or increase. (8) full wall height range, layout of the tensile reinforcement tensile stress in the tensile reinforcement and wall dorsal to earth pressure and earth pressure on the tensile reinforcement tensile stress and wall dorsal maximum does not increase . The prototype observations and theoretical analysis to obtain more consistent results, and the respective validity mutual authentication.

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