Study On The Stability Of Transmission Line Foundation With Constant-resistance Large Deformation Anchor In Mined-out Area

Although the research about tower foundation in mined-out area has madecertain progress, the applicable conditions and adaptation of deformation of variouskinds of foundation forms are not ideal, and transmission tower foundations are notdiversified in mined-out area.In this dissertation, by studying the performance of foundation with largedeformation anchors, in order to verify the mechanism of foundation with largedeformation anchors, then determine the feasibility of this foundation in the practicalengineering application. In this dissertation, through the research of structure offoundation with large deformation anchors, the form of foundation with largedeformation anchors in rock in mined-out area is put forward. Through theoreticalanalysis, numerical simulation and physical test methods, the working mechanism offoundation with large deformation anchors is further verified.This dissertation mainly studies the structure of transmission line foundationwith constant-resistance anchor, and one structure forms are put forward to satisfyuneven settlement of the rock foundation.In this dissertation, the anchor foundationhas carried on numerical analysis, study the mechanical characteristics of thetransmission line foundation with constant-resistance anchor. By studyingdeformation of anchor foundation, deduced the method to determine the force ofanchors adopted in the foundation.Through model test, the failure pattern and the influence factors of modelfoundation are known. Compared the theoretical analysis with the numericalsimulation and safety assessment, the suitable conditions, application mode anddesign method of foundation with constant-resistance anchor in mine-out area areraised.Finite element model which is similar to the physical test is established usingthe ANSYS analysis software. By the simulation about deformation and force ofanchor, get the displacement and ground reaction force curve in different conditionsof foundation deformation. By contrast with anchor and none anchor in twosituations, anchors can reduce the displacement of foundation settlement and reducethe ground reaction force. In addition, due to prevent the bolt from damage, shearbearing capacity and flexural performance of the anchor should be strengthened. Finally, this dissertation in view of safety assessment for the foundation withlarge constant-resistance deformation anchors. Puts forward applicable condition,application mode and design method of foundation with anchors of high voltagetransmission line tower in the mined-out area. And put forward the prospect offurther research of the foundation with constant-resistance large deformationanchors.