Soft soil curing agent, method for curing soft soil and application of soft soil curing agent

A technology of curing agent and soft soil, which is applied in the field of curing soft soil and soft soil curing agent, can solve the problems of high cost and poor curing effect of soft soil in the Pearl River Delta, and achieve low cost, poor solution effect and relatively low cost high effect

Pending Publication Date: 2022-05-27
GUANGDONG POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the application provides a soft soil curing agent, a method for curing soft soil and its application, which can solve the technical problem that the existing soil curing agent has a poor curing effect on the soft soil in the Pearl River Delta and the cost is high

Method used

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  • Soft soil curing agent, method for curing soft soil and application of soft soil curing agent
  • Soft soil curing agent, method for curing soft soil and application of soft soil curing agent
  • Soft soil curing agent, method for curing soft soil and application of soft soil curing agent

Examples

Experimental program
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Effect test

Embodiment 2

[0052] Embodiment 2 of the present application provides a method for the second group of soft soil curing agents to solidify soft soil, including the following steps: doping the soft soil with 3% metakaolin / 3 water glass / 12% cement, 3% metakaolin, respectively Kaolin / 5 silicate / 12% cement, 3% metakaolin / 7 silicate / 12% cement, 5% metakaolin / 3 silicate / 12% cement, stir evenly, and then control the curing temperature as 18 DEG C to 22 DEG C, humidity of 95%, curing for 3 days, 7 days, 14 days, 28 days and 60 days to obtain a soft soil curing agent for curing soft soil.

Embodiment 3

[0054] Embodiment 3 of the present application provides a method for the third group of soft soil curing agents to solidify soft soil, including the following steps: doping the soft soil with 5% metakaolin / 3 water glass / 12% cement, 5% metakaolin, and 5% metakaolin, respectively. Kaolin / 5 silicate / 12% cement, 5% metakaolin / 7 silicate / 12% cement, stir well, and then control the curing temperature to be 18℃~22℃, humidity 95%, curing for 3 days, 7 days, 14 days, 28 days and 60 days to obtain the soft soil curing agent to solidify the soft soil.

Embodiment 4

[0056] This Example 4 is to test the unconfined compressive strength of the solidified soft soil prepared in Comparative Examples 1 to 3, and the results are as follows Figure 1-3 shown, from Figure 1-3 It can be seen that the unconfined compressive strengths of the cement-solidified soft soil obtained after curing for 3 days, 7 days, 14 days, 28 days and 60 days are 0.2Mpa and 0.5Mpa respectively. , 0.7Mpa, 0.9Mpa and 1.2Mpa, and on the basis of 12% doped cement, further doping with water glass or metakaolin can further improve the curing effect. The unconfined compressive strength of the cured soft soil can reach about 2.35Mpa, and the addition of a small amount of metakaolin can achieve a better curing effect in a short curing time of the cement.

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Abstract

The invention relates to the technical field of soil solidification, in particular to a soft soil solidifying agent, a method for solidifying soft soil and application of the soft soil solidifying agent. The soft soil curing agent provided by the invention comprises cement, aluminosilicate minerals and an alkaline activator, in the soft soil curing agent, silicon-oxygen bonds and aluminum-oxygen bonds of the aluminosilicate minerals are subjected to a fracture-recombination process under the action of the alkaline activator, so that a three-dimensional cross-linked network is generated in cement-cured soft soil, and the curing effect of the cement-cured soft soil is improved. The three-dimensional cross-linked network further improves the solidification effect of the cement on the soft soil, the permeability coefficient of the solidified soft soil is 2.6 * 10 <-8 > cm/s when the solidified soft soil is maintained for 7 days, and the unconfined compressive strength of the solidified soft soil can reach 3.26 Mpa when the solidified soft soil is maintained for 28 days. According to the soft soil curing agent, the method for curing the soft soil and the application of the soft soil curing agent, the technical problems that an existing soft soil curing agent is poor in bead triangle soft soil curing effect and high in cost can be solved.

Description

technical field [0001] The present application relates to the technical field of soil solidification, in particular to a soft soil solidifying agent, a method for solidifying soft soil, and applications thereof. Background technique [0002] With the economic development of the Pearl River Delta and the expansion of cities, more and more buildings, such as substations, are built on the soft soil foundation of the Pearl River Delta. [0003] However, due to the characteristics of high water content, high compressibility, low permeability, low shear strength, remarkable sensitivity and rheology of the soft soil in the Pearl River Delta, the curing effect of the curing agent in the soft soil of the Pearl River Delta is not satisfactory. There are more and more cases of uneven settlement of buildings such as substations; for example, the traditional fly ash consolidation method will have low initial strength, poor water stability, and low integrity of the consolidated soil. Con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B7/00B28C5/00E02D3/12
CPCC04B28/00C04B7/00B28C5/003E02D3/12E02D3/126E02D2300/0045C04B2111/00732C04B12/04C04B14/04Y02W30/91
Inventor 李建斌范长俊曲骅张伟锋
Owner GUANGDONG POWER GRID CO LTD
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