Research On Lightweight Fabricated Slope Rapid Reinforce Structure

In recent years,with the continuous implementation of the country’s green development concept,the utilization rate of clean energy has become higher,and more water conservancy and hydropower projects have been constructed.Many existing water conservancy project slopes have been in service for a long time,and the slope supporting structure has been damaged.Once the slope is unstable,it will cause engineering safety accidents and pose a major threat to the safety of people’s lives and properties.The lattice beam anchorage system has the characteristics of light structure,simple construction,strong integrity,and good seismic performance.At the same time,it can fully mobilize the self-stability of soil.It is used as one of the important means of slope reinforcement,which is an efficient,economical,and environment-friendly slope reinforcement method.Research on the new fabricated lattice beam anchorage system can not only realize the rapid construction of slope support and shorten the construction period,but also quickly repair the damaged slope to avoid engineering accidents.The practical application of the lattice beam anchorage system is ahead of the theoretical research,and damage or failure of the components caused by the unreasonable structural design may occur.This article relies on the national key research and development plan "Major natural disaster monitoring,early warning and prevention" key special project "Extra-large landslide emergency treatment and rapid treatment technology research and development" project topic five "Large reservoir and water diversion project landslide treatment engineering repair and reinforcement technology research",to carry out new type fabricated supporting structure.The feasibility of slope support is studied by numerical simulation,the force characteristics and slope reinforcement effect are analyzed,the interaction between the structure and the slope soil is studied,and the dynamic response of the reinforced slope under the action of earthquake waves is analyzed.The main research contents and results are as follows:(1)The new fabricated lattice beam anchorage system was developed,the layout form and construction method of the fabricated structure were studied,and the structural design of fabricated lattice beams and fabricated joints was carried out according to the existing relevant specifications to meet the strength requirements.(2)When the the load on the lattice structure is bigger,the bigger displacement and stress of the lattice beam will be.The maximum displacement appears at the mid-span of the lattice beam,and the maximum stress appears at the upper surface of the joint.When the bearing plate is a round shape with a thickness of 15-20 mm,the stress distribution is more uniform.The optimal lap length between the lattice beam and the joint is 125mm-150 mm.The height of the joint has little effect on the stress of the lattice beam.(3)In order to analyze the interaction between the support structure and the soil,study the reinforcement effect of the support structure on the soil,numerical simulation software are used which can analyze the displacement,stress and plastic status changes of the soil and the axial force of anchor.The soil displacement is larger at the foot of the slope and smaller at the top of the slope.The soil body stress is large where the lattice beam acts.The axial force of the anchor is the largest on the sliding surface and gradually decreases to both sides.(4)Under the pseudo-static state and dynamic state,the changes of slope are studied.The slope displacement of the pseudo-static method is consistent with the slope top and the slope foot.Under the action of earthquake waves,the upper part of the slope displacement is large and the lower part is small,and the axial force of the anchor is also large in the upper anchor.