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由于级配碎石层塌陷、回填改良土压实度不足、回填土湿陷以及动荷载的作用,郑西高铁联络线框构桥(涵)路过渡段产生不均匀沉降。本文以郑西高铁联络线K1046+061处跨径为10m的框构涵路过渡段两端对称下沉为例,采用双液注浆技术进行挤密加固,加固效果明显大,大地延长了维修和保养周期,并随后在郑西高铁联络线得到推广。
Due to the collapse of the graded crushed stone, insufficient compaction degree of the improved backfill soil, the effect of the backfill soil collapsing and the dynamic load, the uneven settlement of the transitional section of the Zhengzhou-Xi’an high-speed railway connecting line frame bridge (culvert) occurs. In this paper, the symmetrical subsidence at the two ends of the culvert transitional section of K1046 + 061 at the cross line of K1046 + 061 in Zhengzhou-Xi’an high-speed railway is taken as an example. The double-grouting technique is used for the compaction reinforcement, And maintenance cycle, and then be promoted in Zhengxi high-speed rail link.