Highway subgrade horizontal grouting groutability test device and evaluation method

Abstract

The invention discloses a highway subgrade horizontal grouting groutability test device and an evaluation method. A grouting device is utilized to inject slurry into a grouting pipe which is horizontally arranged in a test grouting box; the grouting pipe and the other space in the test grouting box form a sand packing area; to-be-tested sand packing is filled in the sand packing area and simulation is carried out to form a subgrade structure; the grouting pipe is communicated to the grouting device through a grouting tube; the slurry is injected through the grouting device; a plurality of grouting through holes are uniformly formed in the pipe wall of the grouting pipe; and the slurry enters a sand packing layer along the grouting through holes, so as to realize groutable simulation of theslurry in the sand packing layer. The device is simple in structure, and is capable of realizing the preparation and pumping of grouting materials and the simulation of slurry injection; groutabilitytest is carried out on the slurry through a grouting sand pipe and a grouting sand disk, so that seepage parameter indexes are obtained; and groutnability of the slurry on the tested soil sample stratums is reflected through the indexes, so that the feasibility of subgrade grouting operation is effectively proved.

Description

technical field [0001] The invention relates to the construction field of grouting reinforcement for highway subgrade treatment, in particular to a test device and evaluation method for horizontal grouting of highway subgrade. Background technique [0002] With the continuous increase of highway traffic volume, the roadbed in some places with poor geological conditions has obvious subsidence, resulting in different degrees of subsidence of the road surface, especially the soft soil foundation in coastal areas. Therefore, it is extremely important to effectively control adverse geological subsidence and effectively consolidate the foundation. important. Among them, static pressure infiltration grouting is the main treatment technology to deal with roadbed subsidence. The current grouting materials continue to develop, and the grouting materials are gradually being promoted because of their many advantages such as environmental protection, wide source of raw materials, econom...

AI Technical Summary

Problems solved by technology

The filling soil in the subgrade is complex, and the pores and cracks are much smaller than the rock cracks. There are no corresponding evaluation methods and indicators for the injectability and reinforcement effects of grouting materials

If on-site construction equipment is used for grouting injectability test, it will cost a lot of manpower and material resources

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