中文摘要：

哈尔滨市松花江北岸滨江大道工程穿越松花江跨江大桥。为减轻路堤填筑对桥桩的影响，基于垂向二维有限元模型及现场监测，研究了土工格栅加筋、钻孔灌注桩隔离及注浆处理等综合措施的可行性，并分析了路堤填筑过程中地基土及桥桩的变形。结果表明：土体加筋、钻孔灌注桩隔离及注浆处理等综合措施可有效减轻路堤填筑对桥桩的影响；路堤填筑对桥桩的影响主要集中在桥墩桩身的上部，桩身下部影响较小；桩基础附加沉降主要由承台上部填土所致，主动区加固措施对减小桥桩的水平位移效果比较明显。研究同时表明，垂向二维有限元模型因桩基简化为板桩墙，使得地层附加应力全部由桩基承担，被动区土层变形的计算结果偏小，桩基变形计算结果偏大。

英文摘要：

Bingjiang Avenue is built along the north bank of Songhua River and runs through the Songpu Bridge in Haerbin city ,the provincial capital of Heilongjiang .The high embankment causes additional stresses in the ground layers affecting on the adjacent piles for the bridge abutment .In this paper ,a 2D FEM model was used to analyze the deforma-tions of soil layers and the performances of bridge piles during the construction .The field monitored data of settlements and lateral displacements were reported and discussed .The synthetic implements including geogrid ,bore piles for stress isolation and compaction grouting were studied for their feasibility on controlling the influences of high embankment on the bridge piles ,as well as the deformation of the foundation and the bridge piles .The results of computations and measure-ments in situ can be summarized as follows ：the synthetic implements mentioned above can alleviate the influence of em-bankment construction on the adjacent bridge piles ;high embankment mainly affects on the performance of upper part of the piles ,while the lower parts are scarcely disturbed ;the additional settlements of the bridge piles were mostly induced by the part of embankment over the pile cap ,while the stress isolation piles in active zone can be more effective to control the lateral displacements of the piles .In addition ,because the row of piles are presented as a sheet wall in the 2D FEM model ,the additional stresses fall on the foundation of the piles ,which leads to larger deformations of bridge piles and smaller deformations of soil layers in passive zone .