Research on the Characteristics of Pile-supported Foundation Support Under Different Additional Ground Loads
In order to study the influence of different additional ground loads on the pile plus in-ternal support pit support structure,taking a project in Nanjing as an example,the calculation model of incremental method combined with elastic foundation beam method was used to analyze the changes of support axial force,support pile displacement and ground settlement under various additional loads.The results show that the support axial force,the maximum displacement of the supporting pile and the maximum settlement of the ground surface at the edge of the pit are positively correlated with the mag-nitude of the additional loads.There is an effective influence point of the additional load on the pit sup-port structure,and vice versa,there is no influence on the pit support structure.The main influence of the additional load on the first support axial force of the pit support structure is within 1.OH(H-exca-vation depth of the pit).The main influence of the additional load on the second support axial force of the pit support structure and the maximum horizontal displacement of the pile body is within 1.5H.The main impact of the width of the additional load on the support structure is within 1.0H,and the effec-tive point of maximum ground settlement gradually moves outward with the increase of the additional load.
deep foundation pitground loadrow of pilesinternal supporthorizontal displace-ment