Cement anti-erosion agent for high-pressure jet grouting and use method thereof

Abstract

The invention discloses a cement anti-erosion agent for high-pressure jet grouting and a use method thereof. The cement anti-erosion agent is prepared by mixing the following raw materials in parts byweight: 65-93 parts of aluminum-containing inorganic salt, 5-12 parts of a thickening agent, 2-5 parts of a mineral admixture and 7-18 parts of an excitant. The anti-erosion performance of cement slurry with a high water-cement ratio can be improved under a low mixing amount by the cement anti-erosion agent; the cement slurry has low fluidity and long initial setting time, a large-diameter cement-soil pile can be formed in a large-gap loose stratum, the long initial setting time facilitates construction operation of inserting a precast pile after the cement-soil pile is formed, loss of cementmaterials can be effectively avoided, and the construction is easy.

Description

technical field [0001] The invention relates to the technical field of cement grouting, in particular to a cement anti-erosion agent for high-pressure jet grouting and a use method thereof. Background technique [0002] With the rapid development of urbanization in my country, land resources are increasingly scarce. The construction land for emerging cities, large factories, airports, and residential communities began to expand offshore. There are more and more sites formed by riprap reclamation. The characteristics of this stratum are: most of the backfill materials are gravel and block stones in the open area, and the backfill particle size is large, the general particle size is 200-600mm, and the maximum particle size exceeds 4000mm; The backfill thickness is large, and the maximum backfill thickness can reach nearly 50 meters; the backfill soil has poor compactness, loose structure, and large gaps between particles; the groundwater is abundant, and there is a poor water...

AI Technical Summary

Problems solved by technology

[0003] When the high-pressure jet grouting process is used to strengthen the foundation of the above-mentioned geological conditions, due to the high fluidity of the cement slurry with a high water-cement ratio, the cement slurry injected into the ground will be lost quickly with the flow of groundwater, not only cannot form cement-soil piles , and because of its low erosion resistance, it will cause waste of cement materials

[0004] In order to increase the erosion resistance of cement slurry, accelerators are currently used to thicken and accelerate cement slurry, but the setting time of traditional accelerators is short and the setting is too fast.

Water glass is used for rapid setting, and the cement slurry can be finalized in 2 minutes, which is not conducive to the penetration of the slurry sprayed into the formation, resulting in the inability to form large-diameter cement-soil piles

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