Spray jet pressure control method

By introducing temporary grout storage containers and waste grout discharge pipes into jet grouting piles, the problem of unstable grout pressure control in jet grouting technology has been solved, achieving stable control and grout penetration of upward inclined jet grouting, expanding the application scope of jet grouting technology, and improving construction quality and control accuracy.

CN115341919BActive Publication Date: 2026-06-30叶晓明 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
叶晓明
Filing Date
2022-06-25
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing jet grouting technology cannot effectively control grout pressure in upward-sloping jet grouting pile construction, leading to grout outflow. Therefore, it cannot be applied to projects that require upward-sloping reinforcement, such as tunnel excavation.

Method used

A temporary grout storage container is introduced through a grout outlet pipe with a grout stop plug, and the grout is allowed to permeate into the soil surrounding the jet grouting body by adjusting the pressure control height L. Excess grout is then discharged into a waste grout container through a waste grout discharge pipe to achieve pressure stabilization control.

Benefits of technology

It has achieved stable control of upward tilting jet grouting and slurry penetration, expanded the application scope of jet grouting technology, improved construction quality and control accuracy, and reduced implementation costs.

✦ Generated by Eureka AI based on patent content.

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    Figure CN115341919B_ABST
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Abstract

This invention provides a method for controlling the pressure of a jet grouting body. The steps include: determining the top elevation H of the jet grouting pile and the pressure control height L; introducing the grout outlet pipe of the grout stop plug into a temporary grout storage container with an elevation greater than L+H, and the outlet elevation of the grout outlet pipe being L+H; setting a waste grout discharge pipe at the bottom of the temporary grout storage container to discharge waste grout into the waste grout container; and adjusting the pressure control height L to prevent the effective grout within the consolidation range from flowing out during jet grouting. This invention cleverly solves the problem of grout outflow during upward inclined jet grouting, enabling the application of jet grouting technology to both horizontal and upward jet grouting operations. It is particularly important for the consolidation of fractured rock masses and soil layers in tunnels and other special situations, greatly expanding the application range of jet grouting technology. More importantly, it can stably and accurately control and adjust the jet grouting body pressure. This invention has strong controllability, low risk, is easy to implement, has low implementation cost, and produces high-quality jet grouting structures after implementation.
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