注浆治理铁路高路基沉陷病害效果及提高注浆质量的探讨

Discussion on the Effects of Settlement Grouting Treatment for High Roadbed of Railway and the Improvement of Grouting Quality

针对京九铁路线衡水工务段局部高路基及桥(涵)台背后高路基出现程度不等的沉陷病害,近2年对该线选择性地进行了约5000延米的静压注浆和重力注浆加固处理,受铁路行车对线轨允许水平沉浮限制,多数高路基注浆量基本正常,但也有局部呈注浆量不足现象。其规律是桥涵台背、护锥体及部分频繁发生塌陷的高路基段注浆量很大,注浆效果良好,基本解决了后续严重再沉陷病害问题;而注浆量很小的高路基段仍需进一步研究工艺措施,增加注入合理的浆量,以彻底治理沉陷病害。

According to the variable degrees of settlement of the local high roadbed and the back of bridge and culvert in Hengshui track division of Beijing -Jiulong, static pressure grouting and gravity grouting consolidation were selectively used for about 5000 running meters in these 2 years. By the train operation limitation of rail allowance to the level undulating, most high roadbed grouting volume is normal, but there are part insufficient grouting. It is often seen that the grouting effects are good in the back of bridge and culvert, supporting cone and some frequent subsiding high roadbed with large a- mount of grouting, which solves subsequent settlement; while the technical process still should be studied for those high roadbed with small amount grouting to treat settlement.