Grouting fluid suitable for secondary lining backfill of water diversion tunnel and its preparation and application method

A technology for secondary lining and water diversion tunnels, applied in tunnel lining, wellbore lining, tunnels, etc., can solve problems such as water gushing in grouting holes, slurry running or channeling, and affecting the effect of grouting water blocking, achieving fast condensation speed and improving Early strength, the effect of improving the effect of grouting water plugging

Active Publication Date: 2021-04-30
THE 5TH ENG CO LTD OF CHINA RAILWAY 25TH BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the tunnel lining is backfilled and grouted on the vault, grouting holes need to be excavated to inject the grouting fluid before grouting. , there will be water gushing from the excavation surface or the grouting hole. At this time, the grouting liquid in the grouting hole has not completely condensed, and the phenomenon of grouting or channeling will easily occur, which will affect the effect of grouting and water blocking.

Method used

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  • Grouting fluid suitable for secondary lining backfill of water diversion tunnel and its preparation and application method

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0042] Preparation example 1 of accelerator: ① Take 40kg of aluminum sulfate, add 50kg of water to it, and heat to 60°C to obtain aluminum sulfate suspension;

[0043] ②Take 10kg of calcium formate and 4kg of calcium chloride, add 30kg of water to it, heat to 40°C; stir evenly for 10min to obtain modifier;

[0044] ③Raise the temperature of the aluminum sulfate suspension to 60°C, add a modifier to the aluminum sulfate suspension, stir at a speed of 600r / min for 30min, keep it warm for 60min, then cool to room temperature, then add 1kg of sodium alginate and 0.5kg Sodium carboxymethyl cellulose, stirred evenly to obtain quick-setting agent.

preparation example 2

[0045] Preparation example 2 of quick-setting agent: 1. Take 45kg of aluminum sulfate, add 55kg of water to it, and heat to 65°C to obtain aluminum sulfate suspension;

[0046] ②Take 12.5kg of calcium formate and 5kg of calcium chloride, add 35kg of water to it, heat to 45°C; stir evenly for 15min to obtain modifier;

[0047] ③Raise the temperature of the aluminum sulfate suspension to 70°C, add a modifier to the aluminum sulfate suspension, stir at a speed of 700r / min for 35min, keep it warm for 75min, then cool to room temperature, then add 1.5kg of sodium alginate and 0.6 kg sodium carboxymethyl cellulose, stirred evenly to obtain quick-setting agent.

preparation example 3

[0048] Preparation example 3 of quick-setting agent: 1. Take 50kg of aluminum sulfate, add 60kg of water to it, and heat to 70°C to obtain aluminum sulfate suspension;

[0049] ②Take 15kg of calcium formate and 6kg of calcium chloride, add 40kg of water to it, heat to 50°C; stir evenly for 20min to obtain modifier;

[0050] ③Raise the temperature of the aluminum sulfate suspension to 80°C, add a modifier to the aluminum sulfate suspension, stir at a speed of 800r / min for 40min, keep it warm for 90min, then cool to room temperature, then add 2kg of sodium alginate and 0.7kg Sodium carboxymethyl cellulose, stirred evenly to obtain quick-setting agent.

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Abstract

The invention discloses a grouting liquid suitable for backfilling the secondary lining of a water diversion tunnel and a preparation and application method thereof. A grouting liquid suitable for backfilling the secondary lining of a water diversion tunnel has a weight ratio of 1:(0.5-0.7 ) of liquid A and liquid B; said liquid A includes the following raw materials in parts by weight: 120-140 parts of cement, 15-20 parts of metakaolin, 1-2 parts of quick-setting agent, 1-2 parts of superplasticizer part and 50-60 parts of water; the quick-setting agent is made of raw materials comprising the following parts by weight: 40-50 parts of aluminum sulfate, 10-15 parts of calcium formate, 3-6 parts of calcium chloride, 1-6 parts of sodium alginate 2 parts, 0.5-0.7 part of sodium carboxymethylcellulose and 80-90 parts of water; the B liquid is composed of water and water glass stock solution with a weight ratio of 0.8:1. The grouting liquid of the present invention can quickly consolidate with the surrounding broken rock blocks to form concretions with a certain strength, cut off the underground water flow path, and achieve the purpose of consolidation and water stop.

Description

technical field [0001] The invention relates to the technical field of building grouting, more specifically, it relates to a grouting liquid suitable for backfilling the secondary lining of a water diversion tunnel and its preparation and application method. Background technique [0002] The diversion tunnel is a hydraulic tunnel that diverts water from the water source; in order to prevent rock collapse and water seepage, the tunnel body is usually supported by anchor shotcrete (using anchor rods and shotcrete) or reinforced concrete; in the construction of the diversion tunnel, it is usually necessary to Carry out primary lining and secondary lining. Primary lining refers to the shotcrete covering after the completion of the initial support steel arch, that is, the layer of concrete that is close to the surrounding rock; secondary lining refers to the layer that is close to the primary lining. The first layer of concrete is usually bound with a steel skeleton, and then pou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21F15/00
CPCE21D11/10E21F15/005
Inventor 王有旗朱连臣刘普前于秀龙冯延明宋昱宇
Owner THE 5TH ENG CO LTD OF CHINA RAILWAY 25TH BUREAU GRP
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