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Measuring method, construction method and tensioning system of viscoelastic-plastic deformation of reinforced soil

A construction method and technology of reinforced soil, applied in the field of elastic mechanics and plastic mechanics, stress deformation and damage of pre-strained reinforced rock and soil, can solve the problem of staying in the mechanism research stage, the reliability of the research results is not high, and the soil is not considered. Problems such as viscous deformation of body and geosynthetic reinforced materials, to avoid excessive additional deformation, prevent fracture failure, and simple structure

Inactive Publication Date: 2018-07-24
CHANGSHA UNIVERSITY
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Problems solved by technology

However, at present, the construction methods of this kind of prestrained reinforcement at home and abroad are still in the mechanism research stage, and the construction technology is still in the indoor model test and simulation stage.
[0003] Due to the complex mechanical properties of soil reinforced with geosynthetics, the research theory on this aspect at home and abroad has been stuck in the elastic-plastic stage, without considering the viscous deformation of soil and geosynthetics reinforced materials, so the research results are reliable. The reliability is not high, and the accuracy of the final deformation estimation of the reinforced soil after construction cannot be guaranteed

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  • Measuring method, construction method and tensioning system of viscoelastic-plastic deformation of reinforced soil
  • Measuring method, construction method and tensioning system of viscoelastic-plastic deformation of reinforced soil
  • Measuring method, construction method and tensioning system of viscoelastic-plastic deformation of reinforced soil

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Embodiment Construction

[0024] Construction method of the present invention comprises the steps:

[0025] 1) According to the width B corresponding to each layer of the subgrade i , Layer height H i And turn-up length (L, the value is not less than 1.5m according to the specification requirements), and the geosynthetics are cut, that is, a suitable length (not less than B i +2H i +2L) of geosynthetics (such as figure 1 );

[0026] 2) Determine the initial pre-strain Δε of geosynthetics i ' and the deformation ε of the pre-strained reinforced soil (mixed with geosynthetics and soil) in the viscoelastic-plastic state after construction;

[0027] Among them, for geonetwork, Δε i 'The value range is 6.29%~7.459%; for geogrid, Δε i The value range of 'is 2.43%~3.759%; ε is valued according to formula (24) in the present invention. The sum of the two (Δε i '+ε) cannot exceed the allowable elastic strain value of the selected reinforcement (ie, geosynthetic material), so as to prevent the fracture ...

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Abstract

The invention provides a reinforced earth body sticky, elastic and plastic deformation measuring method, a construction method and a tensioning system. A computational formula for pre-strain reinforced earth body sticky, elastic and plastic deformation epsilon is shown in the specification. By the adoption of the sticky, elastic and plastic deformation measuring method, the pre-strain reinforced material total deformation generated after construction is more comprehensively, accurately and reliably estimated, and it is guaranteed that the initial deformation of a reinforced material is proper when the reinforced material is tensioned, so that the situation that the additional deformation of the reinforced material is too large due to the settlement deformation of an embankment is avoided, and the phenomenon that the allowing strain of the reinforced material is exceeded and consequently the reinforced material is broken and fails is prevented. By the adoption of the construction method, occurrence of geological disasters in the environments such as high and steep slope large slippage can be scientifically prevented and reduced.

Description

technical field [0001] The invention relates to the fields of stress deformation and damage of pre-strained reinforced rock and soil, elastic mechanics and plastic mechanics, in particular to a calculation method for the complex viscoelastic-plastic total deformation of pre-strained reinforced soil during the design and construction of high-fill embankment. Background technique [0002] The pre-strain reinforcement method is a new construction technology gradually developed in recent decades. The pre-strain reinforcement method is to stretch the geosynthetic material to produce a certain amount of deformation before the reinforced soil is subjected to external loads, and with the help of the elastic retraction of the geosynthetics, the tension area of ​​the reinforced soil is pre-aligned with the interface. Apply a preload, which is often called prestress. On the one hand, the reinforced soil produces tensile stress under the action of external load, which needs to be offse...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/04E02D1/08
CPCE01C3/04E02D1/08
Inventor 匡希龙雷鸣黄立浦谢海涛彭旺虎
Owner CHANGSHA UNIVERSITY
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