Hole sealing grout stop material and grouting hole sealing process

A technology for sealing holes and stopping grouting, which is applied in basic structure engineering, soil protection, construction, etc. It can solve problems affecting grouting work efficiency and cost, high hardness of grouting plugs, and difficulty in plugging, and achieves adjustable setting time and guaranteed The effect of grouting pressure and strong self-healing ability

Inactive Publication Date: 2012-12-26
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hardness of the grout plug is high, the grout returns around the plug, and the uneven hole diameter makes it difficult to

Method used

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  • Hole sealing grout stop material and grouting hole sealing process
  • Hole sealing grout stop material and grouting hole sealing process
  • Hole sealing grout stop material and grouting hole sealing process

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Embodiment

[0032] A sealing and grout-stopping material of the present invention, which is mainly prepared from clay puree, cement and sodium metaaluminate, and the clay puree is mainly made by stirring clay and water, and its specific gravity is 1.25 (1.25-1.35 can be ). The sealing and anti-grouting material is used to ensure the pressure of grouting under the condition of soft permeable rock and soil, high groundwater level or pressurized water. Every 2L of clay slurry is mixed with 840g of cement (P42.5 Ordinary Portland cement) and 16.8g of sodium metaaluminate.

[0033] The above-mentioned sealing and grouting material of this embodiment can ensure the grouting pressure, has strong resistance to water dilution, and can be pumped in the initial stage, and the consistency of the sealing material (measured by a mortar consistency meter) is within the pumpable period (20min-35min) Keep above 76mm and decrease rapidly after the pumpable period; the viscosity of the sealing material (me...

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Abstract

The invention discloses a hole sealing grout stop material, which is a hole sealing grout stop material for guaranteeing grouting pressurization under the condition of loose permeable rock-soil body, high underground level or confined water. The hole sealing grout stop material is mainly prepared from clay primary grout, cement and sodium metaaluminate, wherein every 2 L of clay primary grout is mixed with 700-900 g of cement and 12.5-17.5 g of sodium metaaluminate. A grouting hole sealing process comprises hole sealing operation and grouting operation, wherein the hole sealing operation specifically comprises the following steps of: after forming a hole, dropping a grouting pipe to the bottom of the hole and mounting a orifice closer; opening the orifice closer and injecting the hole sealing grout stop material; closing the orifice closer and flushing the grouting pipe by using stable grout; and opening the orifice closer, performing grouting operation after solidifying the hole sealing grout stop material, and guaranteeing reliable hole sealing grouting through continuous lift grouting. The grouting hole sealing process has the advantages of simple steps, less equipment investment, high applicability, capabilities of guaranteeing the reliability of the hole sealing grout and increasing the grouting efficiency and the like.

Description

technical field [0001] The invention belongs to the field of grouting for foundation treatment of geotechnical engineering, and in particular relates to a hole-sealing and grout-stopping material and a construction technique for grouting and hole-sealing and grout-stopping using the hole-sealing and grout-stopping material. Background technique [0002] In the anti-seepage and reinforcement projects of fully (strongly) weathered rock mass, loose soil layer, gravel layer, rock mass with densely developed joints and fissures, etc. The body sealing supplemented by the orifice sealer can realize grouting sealing and grouting. [0003] The measure of sealing hole and grouting is the basic guarantee of grouting pressure, which directly affects and restricts the implementation of grouting process, especially the key to the success or failure of high-pressure grouting. [0004] At present, the methods for sealing holes and stopping slurry mainly include two types: orifice sealing a...

Claims

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Application Information

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IPC IPC(8): C04B28/00E02D3/12E02D19/16
Inventor 张贵金陈安重杨松林彭春雷胡大可钟平曾柳絮胡荣宗梁经纬盛松涛
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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