Research On The Interaction Between Building Vertical Load Piles And Rock Slopes

Guizhou is located in a mountainous area.Due to site restrictions,a large number of buildings are built on slopes,many of which are on the top of the slope and are very close to the side slope.For slope-facing buildings on a side slope,the pile foundation is often used to extend the elevation below the slope bottom to transmit the building load below the slope's influence range and ensure the safety of the side slope and the building on the slope.For rock slopes,when the pile foundation passes through the rock mass within the influence range of the slope,it is often required to adopt the isolation measures between the pile and the rock mass within the potential sliding range.This measure is only based on qualitative understanding to avoid the impact of the pile on the slope.Adverse effects,and there are few specific studies on the vertical load transfer law of the pile foundation adjacent to the slope in the slope body.Based on qualitative understanding,some projects have adopted isolation measures,while others have ignored isolation measures.Therefore,studying the load transfer law of the pile foundation of the slope building has become an urgent problem in engineering.Based on this situation,the author elaborated on the load transfer of vertically loaded piles,the deformation and failure of rock slopes and the stability analysis.On this basis,with the help of FLAC3 D finite difference software,the author first studied the project based on practical examples.It is found that the isolation layer of the pile foundation can effectively prevent the vertical load of the pile foundation from being transmitted to the slope landslide,reduce the deformation of the slope,and is beneficial to the stability of the slope;Research on the joint effects of high-quality slopes has been carried out.(1)In a stable homogeneous rock slope,for the pile foundation close to the top of the slope,the slope has a certain influence on its vertical load transmission,and it will behave when the slope angle is large or the quality of the rock mass is poor.More obvious.(2)In a stable bedding rock slope,for the pile foundation closer to the top of the slope,the bedding angle has less influence on the vertical load transfer,while the rock parameters have a greater influence.Under the same load,The lower the quality of the rock formation,the smaller the corresponding pile side resistance.(3)In a bedding rock slope supported by prestressed anchor cables and lattice beams,the shear force of the lattice beams and the axial force of the anchor cables increase with the increase of the pile foundation load;The maximum shear force on the beam appears near the potential sliding surface.Under the same load conditions,the closer the anchor cable is to the slope toe,the greater the axial force,which to a certain extent verifies the "fixed foot and strong waist" in slope treatment.Importance;when the pile foundation crosses the potential sliding surface,the axial force of the anchor cable is more sensitive to its load increase;the increase of the vertical load of the pile foundation may cause the horizontal displacement of the pile top to be greater than the limit of the horizontal displacement of the pile top of the sensitive building,thus Affect the normal use of pile foundation.(4)In most cases,whether it is a stable natural slope or a supported artificial slope,when the building pile foundation crosses the potential fracture surface of the rock slope,the vertical load transfer law is less affected by the slope Most of the pile side resistance is still borne by the pile section above the potential sliding surface.When the vertical load of the pile foundation increases,the slope deformation will increase and the supporting structure may be damaged,which will affect the normal use of the pile foundation,so isolation is required.Measures should be taken to avoid the formation of new loads on the slope.