新加宽路基填筑对既有路堤工后沉降的影响分析

本文根据某一路堤裂缝变化和沉降监测结果,结合理论分析,得出新加宽路基填筑过程中产生的外力使既有路堤开裂是由两者不均匀沉降引起.提出新旧路基连接的处理应从地基处理的材料和深度,加固路堤本体两方面来考虑的建议,为类似工程施工时需要采取怎样的措施防止既有路堤开裂,避免路基病害提供参考依据.

ANALYSIS OF INFLUENCE ON POST-CONSTRUCTION SETTLEMENT OF EXISTING EMBANKMENT BY FILLING NEWLY WIDENED SUBGRADE

Based on the crack change and settlement monitoring result of one embankment, this paper gives a conclusion that crack occurring to existing embankment is caused by unbalanced settlements between old embankment and new embankment owing to the outside force during filling newly widened subgrade in combination with theoretic analysis, proposes the suggestion that two aspects, namely materials and depth of subgrade treatment and reinforcing embankment body, should be considered for treatment of connection between new subgrade and old subgrade, for providing the basis for taking measures to avoid the crack of embankment and disaster of subgrade.