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A leak-stopping agent for foundation pit row pile enclosure wall and its application method

A leak-stopping agent and retaining wall technology, applied in chemical instruments and methods, infrastructure engineering, drilling compositions, etc., can solve the problems of low-strength leak-stopping agent, poor matching of base surface, high price, etc. Achieve low price, improve plugging effect, and improve impact resistance

Active Publication Date: 2021-11-16
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects and deficiencies in the above-mentioned prior art, the present invention provides a leak-stopping agent used for the retaining wall of pile rows in foundation pits. The purpose of the invention is to solve the low strength of the leak-stopping agent in the prior art , high price, and poor conformity with the base surface; the invention provides a plugging agent with low price and excellent durability

Method used

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  • A leak-stopping agent for foundation pit row pile enclosure wall and its application method
  • A leak-stopping agent for foundation pit row pile enclosure wall and its application method
  • A leak-stopping agent for foundation pit row pile enclosure wall and its application method

Examples

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Effect test

Embodiment 1

[0040] As a preferred embodiment of the present invention, this embodiment discloses:

[0041] A leak-stopping agent for foundation pit row pile enclosure walls, comprising the following raw materials by mass percentage: 50% of aluminate cement clinker, 6% of anhydrite, 16% of rice fiber, 16% of sodium bentonite, Walnut shell chips 12%.

[0042] After mixing the above four materials evenly, refer to the test of GB23440-2009 "Inorganic Waterproof Plugging Material" to obtain the performance index of the plugging agent of this embodiment: initial setting time 8min, final setting time 21min, 1h compressive strength 6MPa, 2h The compressive strength is 16.5MPa, and the 28d compressive strength is 48MPa.

[0043] In this example, the alkalinity coefficient of aluminate cement clinker is 0.9, the ratio coefficient of calcium aluminate is 3.0, the C2AS content is 7%, and the specific surface area of ​​clinker grinding is 600m 2 / kg.

[0044] The specific surface area of ​​anhydrit...

Embodiment 2

[0049] As another preferred embodiment of the present invention, with reference to the attached Figure 1-4 , this example discloses:

[0050] Utilize the leak-stopping agent in embodiment 1, block the water leakage 2 of 300mm on the retaining wall of row pile 1, as figure 1 As shown, in the foundation pit 5 of the foundation 3, a row of piles 1 and an enclosure wall are arranged, and a water leak 2 is arranged on the enclosure wall. The specific usage method is:

[0051] Step A, clean up the mud and stones on the surface of the leaking port 2, chisel the leaking port 2 into a funnel shape, and reduce the water pressure at the outlet of the leaking place; at the same time, put stones in the sack 9 for standby;

[0052] Step B. After fluffing the hemp rope fiber and cotton fiber, use pliers to stuff it into the water leak 2; the machine passes through the water leak 2 on the enclosure wall, and inserts the filling fiber 8 into the soil layer 6 behind the enclosure wall In the...

Embodiment 3

[0057] As another preferred embodiment of the present invention, this embodiment discloses:

[0058] A leak-stopping agent for pile-row retaining walls of foundation pits, comprising the following raw materials by mass percentage: 64% of aluminate cement clinker, 10% of anhydrite, 2% of straw fiber, 4% of sodium-based bentonite, Walnut shell chips 20%.

[0059] After mixing the above four materials evenly, refer to the test of GB23440-2009 "Inorganic Waterproof Plugging Material" to obtain the performance indicators of the plugging agent of this embodiment: initial setting time 7min, final setting time 18min, 1h compressive strength 7.3MPa, 2h compressive strength 17.6MPa, 28d compressive strength 54MPa.

[0060] In the present embodiment, the alkalinity coefficient of aluminate cement clinker is 0.85, the ratio coefficient of calcium aluminate is 2.5, and C 2 The content of AS is 15%, and the specific surface area of ​​clinker grinding is 600m 2 / kg.

[0061] The specific...

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Abstract

The invention discloses a leak-stopping agent used for the retaining wall of row piles of a foundation pit and an application method thereof, and relates to the technical field of building materials. The plugging agent raw material of the present invention comprises aluminate cement clinker 50 ~ 64%; Anhydrite 6 ~ 10%; Straw fiber 2-16%; Bentonite 4 ~ 16% and walnut shell chip 12 ~ 20%; The plugging agent is inexpensive and has excellent durability. The invention also provides a method for using the leak-stopping agent, which is simple in construction and operation, does not increase the amount of work and construction machinery, and has low cost of leak-stopping; in addition, walnut chips and short fibers are "bridged", plugged and embedded, The percolation and "throat blocking" effect hinder the outflow of the plugging agent, and the plugging effect is significantly improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a leak-stopping agent used for the retaining walls of pile rows in foundation pits and its application method. Background technique [0002] In recent years, the acceleration of urbanization has led to an increase in the demand for high-rise buildings and underground rail transit. The excavation of foundation pits has become deeper and deeper, and the use of underground space has become more and more sufficient. Deep foundation pit is a sub-item project with high risk, and its enclosure system is related to the safety of the entire foundation pit excavation. At present, the commonly used deep foundation pit support forms in my country include row piles (cast-in-situ piles, deep mixing piles) support, underground diaphragm wall, steel sheet pile enclosure structure, SMW piles and other forms. Among many deep foundation pit enclosure structures, row pile support has mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/46E02D19/18
CPCC09K8/46E02D19/18
Inventor 王宁林燕杨涛胡继宗
Owner JIAHUA SPECIAL CEMENT
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