高填路堤下涵洞病害机理

Disease Mechanism of Culvert under Embankment of Special High-stacked Soil

针对某高填路堤涵洞实体工程的病害,采用压力盒、水准仪及沉降观测仪器对其进行了全程监控,依据所测压力、沉降以及裂缝形态阐述了涵洞裂缝的产生机理,并从地基、基础、填土等方面分析了涵洞病害产生的因素,推定了涵洞基础扭转破坏的运动过程。指出在涵洞设计中应综合考虑地形因素,避免产生“扁担效应”,同时在现场施工过程中应采取合理的施工速度。

Based on the disease evalution of the culvert under the embankment ofthe special higstacked soil, the crevice mechanics of the culvert is expatiated hy some datum of pressure, sedimentation and crevice shape, which are acquired with pressure cell, and the instrument of water level and settlement observation . The disease mechanism of the culvert is analyzed according to groundsill, foundation and filling, and the damage process of torsion on the culvert foundation is understood synchronously. The results show that the landform element should be taken into account in the design of culverts in order to avoid the phenomena of shoulder pole, and rational construction rate must be taken on the spot construction. 12 figs, 6 refs.