A test device and evaluation method for horizontal grouting of highway subgrade

Abstract

The invention discloses a test device and evaluation method for the injectability of horizontal grouting of highway subgrade. The grouting device is used to inject slurry into the grouting flower pipe arranged horizontally in the test grouting box, and the grouting flower pipe and the test grouting box The other spaces inside the body constitute the sand filling area, and the sand filling to be tested is filled in to simulate the formation of the subgrade structure. The pipe wall is uniformly provided with a plurality of grouting through holes, and the slurry enters the sand filling layer along the grouting holes, thereby realizing the simulation of the injectability of the slurry along the sand filling layer. This device has a simple structure and can Realize the preparation, pumping and grouting simulation of grouting materials, through the grouting sand tube and grouting sand table test on the grouting ability, obtain the seepage parameter index, and reflect the grouting effect in the test soil sample formation through the index Injectability analysis to effectively demonstrate the feasibility of subgrade grouting operations.

Description

A test device and evaluation method for horizontal grouting injectability of highway subgrade technical field The present invention relates to a kind of highway subgrade treatment grouting reinforcement construction field, be specifically related to a kind of highway subgrade horizontal injection Slurry castability test device and evaluation method. Background technique [0002] With the continuous increase in the traffic volume of the expressway, obvious settlement of the roadbed occurs in some places with poor geology, thereby Cause different degrees of subsidence of the pavement, especially the soft soil foundation in coastal areas, so the poor geological subsidence is effectively controlled, and the foundation is improved. Effective consolidation is extremely important. Among them, hydrostatic osmosis grouting is the main technical means to deal with the subsidence of highway subgrade. Currently The continuous development of grouting materials, grouting materials...

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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