Road and bridge transition section grouting construction method used during jacking construction

Abstract

The invention relates to a road and bridge transition section grouting construction method used during jacking construction. According to the method, with a drilling pipe, a plurality rows of scallop grouting holes are drilled from railway shoulders on two sides of a road and bridge transition section towards the lower part of the railway with an inclined downward scallop manner; when one hole is produced, the drilling pipe is fetched, a shock tunnel is inserted into the hole, and grouting fluid is injected; when the grouting fluid level is 2 meters far from the ground, grouting is stopped, a grouting port is sealed, and the next hole is proceeded; an included angle range of the grouting scallop area relative to a subgrade plane is 15-75 DEG, and an adjustment range of adjacent two grouting holes 5 is 5 DEG. With the road and bridge transition section grouting construction method provided by the invention, road and bridge transition sections can be strengthened without breaking normal railway operation; the work space is small; the operation is convenient; and subsidence deformation of the road and bridge transition sections can be effectively controlled, such that uneven subsidence between the road and bridge transition sections and mass boxes can be prevented. Therefore, the method is beneficial for traffic security and personal security of a railway, and provides substantial economic benefits.

Description

technical field [0001] The invention belongs to the technical field of traffic, in particular to a grouting construction method for a transition section of a road and bridge during jacking construction. Background technique [0002] With the rapid development of the national economy, the existing traffic facilities need to be gradually transformed. When the old frame bridge under the existing railway can no longer meet the traffic requirements, or a road intersecting it needs to be built under the existing railway, it is necessary to install the new frame bridge under the railroad track at the junction of the railway and the road. The frame bridge is mainly composed of a large box body and auxiliary facilities such as a bottom plate and a wing plate. At present, the method of setting large-scale boxes under the existing railway is mainly to adopt the jacking method, which is to set multiple jacks on the rear side of the large-scale box to be jacked by the operator, and then...

AI Technical Summary

Problems solved by technology

However, there are following problems in this prior art method for jacking large boxes: since the volume and weight of the large box are very large, it is usually necessary to reinforce the foundation at the place where the large box is pre-set before the jacking construction treatment to prevent large boxes from settling during future railway operations, thereby affecting traffic safety

However, if figure 1 As shown, the road-bridge transition section 2 located on both sides of the large box body 1 has been damaged or disturbed during the jacking construction, and it is not easy to deal with the impact of the railway 3 transportation after the jacking is completed. Therefore, the jacking construction During the completed railway operation period, uneven settlement will occur between the road-bridge transition section 2 and the large box body 1, which will cause the phenomenon of "jumping" of the train, and even endanger the safety of railway traffic or even personal safety in severe cases

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