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Anti-seepage cut-off underground curtain wall coal ash based impermeable material and construction method

A technology of anti-seepage material and construction method, applied in infrastructure engineering, construction and other directions, can solve the problems of insufficient strength of waterproof curtain piles, discontinuous grouting stone body, incompatibility with environmental protection policies, etc., and achieves reduction of porosity and cost. , the effect of strong adaptability

Active Publication Date: 2019-07-26
DAYAN MINE IND NEIMENGGU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction of grouting curtain is convenient and the technological process is simple, but there are disadvantages such as discontinuous grouting stones, unsatisfactory water-stop effect, and low strength of curtain wall.
Water-proof curtain piles have good water-stop effect and convenient ground construction, but the strength of water-proof curtain piles is not enough, the cost is high, and the construction period is long
The underground diaphragm wall has good anti-seepage performance, strong adaptability, high efficiency, and reliable quality, but the material cost is high, and the aggregates such as sand and stone used in concrete need to be obtained through sand digging and quarrying, which damages the environment and is incompatible with the current environmental protection policy out of place

Method used

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  • Anti-seepage cut-off underground curtain wall coal ash based impermeable material and construction method
  • Anti-seepage cut-off underground curtain wall coal ash based impermeable material and construction method

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Experimental program
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Effect test

Embodiment 1

[0038] Anti-seepage material raw materials (all parts are parts by weight): 40 parts of cement, 60 parts of fly ash, 5 parts of silica fume, 2 parts of bentonite, 2 parts of sodium chloride, 1.5 parts of calcium lignosulfonate, and drinking water 70 servings.

[0039] 1.1. Prepare the fly ash-based anti-seepage material for the anti-seepage and closure underground curtain wall of the open-pit mine according to the following steps:

[0040] Step 1), take drinking water, sodium chloride, and calcium lignosulfonate according to the weight of the formula and put them in a slurry mixer and stir evenly for 30 seconds;

[0041] Step 2), according to the weight of the formula, take bentonite and add it to the stirred solution in step 1) and stir evenly for 20 seconds;

[0042] Step 3), add cement, fly ash, and silica fume to the mixture stirred in step 2) respectively according to the formula weight, stir while adding, finish adding within 20 seconds, and stir evenly for 90 seconds. ...

Embodiment 2

[0050] Raw materials of anti-seepage material (all parts are parts by weight): 40 parts of cement, 60 parts of fly ash, and 70 parts of drinking water.

[0051] 2.1. Prepare the fly ash-based anti-seepage material for the anti-seepage and closure underground curtain wall of the open-pit mine according to the following steps:

[0052] Step 1), take drinking water according to formula weight;

[0053] Step 2), add cement and fly ash to the mixture after step 1) respectively according to the formula weight, stir while adding, finish adding within 20s, and stir evenly for 90s.

[0054] 2.2. Pouring underground curtain wall for anti-seepage and interception in open-pit mine:

[0055] The mud retaining wall is used in the process of forming the groove of the anti-seepage closure curtain wall, and the specific gravity of the mud in the groove section is 1.08g / cm 3 Around, the tank bottom mud may reach 1.2g / cm 3 ;Concrete according to the following steps:

[0056] Step 1), after t...

Embodiment 3

[0061] Raw materials of anti-seepage material (all parts are parts by weight): 40 parts of cement, 60 parts of fly ash, 2 parts of bentonite, 1.5 parts of calcium lignosulfonate, and 70 parts of drinking water.

[0062] 3.1. Prepare the fly ash-based anti-seepage material for the anti-seepage and closure underground curtain wall of the open-pit mine according to the following steps:

[0063] Step 1), take drinking water and calcium lignosulfonate according to the weight of the formula and place them in a slurry mixer and stir evenly for 30 seconds;

[0064] Step 2), according to the weight of the formula, take bentonite and add it to the stirred solution in step 1) and stir evenly for 20 seconds;

[0065] Step 3), respectively add cement and fly ash to the mixture stirred in step 2 according to the formula weight, stir while adding, finish adding within 20 seconds, and stir evenly for 90 seconds.

[0066] 3.2. Pouring underground curtain wall for anti-seepage and interception...

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Abstract

The invention provides an anti-seepage cut-off underground curtain wall coal ash based impermeable material and a construction method. The impermeable material needs no sands and stones, coal ash serving as a power plant waste can be used, solid waste emission and environmental destruction can be reduced, and the impermeable material is green and environmentally friendly. The impermeable materialis used for casting and forming an underground curtain wall and has the advantages of convenience in construction and simple casting technological process, and the formed underground continuous wall is high in adaptability and good in impermeability. The anti-seepage cut-off underground curtain wall coal ash based impermeable material comprises, by weight, 40 parts of cement, 50-70 parts of coal ash, 5-10 parts of silica fume, 2-4 parts of bentonite, 2-3 parts of sodium chloride, 1.5-3 parts of calcium lignosulphonate and 60-70 parts of water.

Description

technical field [0001] The invention relates to the technical field of anti-seepage and interception in open-pit coal mines, metal mines and underground mines, in particular to a fly ash-based anti-seepage material for underground curtain wall anti-seepage and interception in open-pit mines. Background technique [0002] At present, mine water interception curtains mainly include grouting curtains, water-proof curtain piles and underground diaphragm walls. The construction of grouting curtain is convenient and the technological process is simple, but there are disadvantages such as discontinuous grouting stones, unsatisfactory water-stop effect, and low strength of curtain wall. The water-proof curtain pile has better water-stop effect and convenient ground construction, but the water-proof curtain pile is not strong enough, the cost is high, and the construction period is long. The underground diaphragm wall has good anti-seepage performance, strong adaptability, high effi...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/08E02D19/18C04B111/27
CPCC04B28/04C04B28/08C04B2111/27C04B2201/50E02D19/18E02D19/185C04B18/08C04B18/146C04B14/104C04B22/147C04B24/18
Inventor 彭巍黄选明赵永峰王海刘子春曹海东韩家明张雁卜桂玲赵贵彬
Owner DAYAN MINE IND NEIMENGGU
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