Study On Design Theory And Construction Technique Of Pile-Anchor Structures

Pile-anchor structure, which is the simple name of anti-sliding pile, foundation beam and foundation frame beam with prestressed anchor cable, is widely applied in geotechnical engineering. Several design and calculation methods of the internal forces for the pile and foundation beam have different effect when applied in anti-sliding engineering because of their different basis hypothesis. According to contrasting and analyzing several internal calculation methods of the pile-anchor structures, this paper summarized and put forward the calculation methods which calculation results are well in accord with the practical engineering, together with the systemic design and calculation theory. The static equilibrium method, converse beam method and elastic foundation beam method are suggested to calculate the internal forces of foundation beam with prestressed anchor cable,. To split the frame beam into simple beams by the deformation consistence principle, the internal forces of the frame beam can be calculated with the method of the foundation beam. The method of elastic foundation beam with restriction of transverse deformation is recommended to calculate the internal forces of the anti-pile. This paper also suggests to calculate the internal forces of the pile-anchor structure in term of their pulling process and work process. The earth pressure acting on the foundation beam can be determined by the case of occurring landslide. The calculation results of the internal forces are validated by site test results from the K28+905 construction site on the Chang Zhi to Jing Cheng express highway.