Secondary grouting method applied to space between bottom plate and foundation in installation work of mechanical equipment

A technology for installation engineering and secondary grouting, applied in infrastructure engineering, construction, etc., can solve problems such as inability to work, equipment in poor working condition, and high plasticity of concrete.

Active Publication Date: 2012-07-04
JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plasticity of these concretes is large. Under the action of its own weight, the concrete will settle and shrink before it solidifies, leaving gaps under the bottom plate of the equipment. These gaps often lead to poor working conditions of the equipment and serious inability to work.

Method used

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  • Secondary grouting method applied to space between bottom plate and foundation in installation work of mechanical equipment
  • Secondary grouting method applied to space between bottom plate and foundation in installation work of mechanical equipment

Examples

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Embodiment 1

[0018] The booster used consists of a shovel and a push rod fixed at one end on the shovel; the shovel is an angle steel with a side length of 45×45 mm and a length of 500 mm; the push rod is a steel bar with a length of 5 meters and a diameter of 20 mm; One end of the push rod is fixed in the middle of either side of the shovel, and the angle steel opening is forward.

[0019] The bottom plate of a new hot blast stove in a certain ironworks has a diameter of 9 meters, and the bottom plate is shaped like a pot bottom. There are more than 6,000 tons of checker bricks and other refractory bricks in the hot blast stove. These checker bricks are not built with cement, but placed in the hot blast stove. . The design uses C30 fine stone concrete grouting material for secondary grouting. The normal high temperature of the hot air in the hot blast stove is 1250-1500°C, and the incoming cold air is 250°C. If there are gaps in the secondary grouting, the checker bricks placed in the h...

Embodiment 2

[0022] A 300,000-watt large-scale motor in a project caused excessive vibration during the test run of the equipment due to insufficient grouting. After the diagnosis was that the grouting was not dense, the equipment had to be hoisted again, the undense grouting layer was removed, and the dry hard concrete grouting material was used for re-grouting. The special booster pushed the dry hard concrete into place, and after 14 days of maintenance, the test run was successful again. After being put into production, the equipment has been operating normally.

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Abstract

The invention discloses a secondary grouting method applied to a space between a bottom plate and a foundation in installation work of mechanical equipment, belonging to the secondary grouting technology. The method concretely comprises the following steps: (1) washing and wetting a region to be grouted 1-2 days ahead; (2) calculating the using amount of a grouting material, and stirring and mixing into super-dry hard concrete grouting material; (3) pushing the grouting material into the grouting region by a booster specially for grouting, and grouting to be full and compact as required; (4) surrounding the grouting region tightly by plasticity concrete; (5) performing pressure grouting until the pressure grouting is operated to be full by cement plaster. The principle of the invention is as follows: the super-dry hard (zero slump) concrete is used as the grouting material, and the grouting material cannot settle and contract before the grouting material is solidified. The secondary grouting method has the beneficial effects that: the method solves the problem that the space between the equipment bottom plate and a grouting layer is provided with a gap and is incompact due to falling of the plasticity concrete, caused by dead weight before solidification when the plasticity concrete is used for grouting.

Description

technical field [0001] The invention relates to a secondary grouting method, in particular to a secondary grouting method between a bottom plate and a foundation in mechanical equipment installation engineering. Background technique [0002] After the mechanical equipment is installed, in order to make the mechanical equipment work normally and stably, it is necessary to carry out secondary grouting between the equipment bottom plate and the foundation. For a long time, ordinary fine aggregate concrete or self-leveling material has been used for secondary grouting after mechanical equipment installation. The plasticity of these concretes is large, and under the action of its own weight, the concrete will settle and shrink before it solidifies, leaving gaps under the bottom plate of the equipment. These gaps often lead to poor working conditions of the equipment, and serious failure to work. Contents of the invention [0003] In order to solve the above technical problems,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/02
Inventor 宋功业
Owner JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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