High-pressure grouting device for deepwater karst fissure development geology and construction method

A high-pressure grouting and karst technology, which is applied in infrastructure engineering, soil protection, construction, etc., can solve the problems of frequent occurrence and achieve the effect of small construction area, convenient operation and convenient construction

Pending Publication Date: 2020-04-14
SHANGHAI CIVIL ENG GRP FIFTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, with the increasing development of bridges across rivers and rivers, it is common to build a new bridge around the existing bridges in urban bridges. However, in the face of complex geological conditions, b

Method used

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  • High-pressure grouting device for deepwater karst fissure development geology and construction method
  • High-pressure grouting device for deepwater karst fissure development geology and construction method
  • High-pressure grouting device for deepwater karst fissure development geology and construction method

Examples

Experimental program
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Example Embodiment

[0041] Embodiment 1, please refer to the attached Figure 1-5As shown, a geological high-pressure grouting device for deep-water karst fissures includes a casing 1, a slurry feeding pipe 2, a steel flower pipe 3, and a screw sleeve 4. The casing 1 is made of Q345 material, and the pipe diameter is φ150mm and There are two kinds of φ90mm. The wall thickness of the casing 1 of the two pipe diameters is 4-6 mm, and the two ends of the casing 1 are symmetrically provided with external thread sections 1a; There is a casing material protective layer 5, the diameter of the casing material protective layer 5 is about 5mm smaller than the diameter of the casing 1 with a pipe diameter specification of φ150mm, and the top and bottom of the casing material protective layer 5 are respectively A casing material top plug 5b and a casing material bottom plug 5c are provided; the casing material protective layer 5 is filled with a casing material 5a, and the casing material 5a is composed of e...

Example Embodiment

[0042] In the second embodiment, please refer to the attached Image 6 As shown, combining the type of grouting device and the installation method expressed in the above-mentioned first embodiment, a construction method of geological high-pressure grouting with deep-water karst fractures is provided, and the method includes the following five steps:

[0043] Step 1, material preparation: prepare the grouting raw materials and grouting equipment required for grouting, and place the grouting raw materials and grouting equipment on the floating platform. The grouting equipment includes the grouting device expressed in the first embodiment. type and other grouting equipment;

[0044] Step 2. Positioning: According to the hole layout of the design drawing, carry out point stakeout, move the floating platform to the design hole position for fixing, and then accurately stake out again after fixing;

[0045] Step 3: Drilling: Move the drilling rig to the orifice, lower the casing 1 w...

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Abstract

The invention discloses a high-pressure grouting device for deepwater karst fissure development geology and a construction method. The construction method mainly comprises the five steps of material preparation, positioning, drilling, pipe placing and grouting; firstly, grouting raw materials and grouting equipment needed for grouting are prepared; secondly, preliminary and accurate point positionlofting is conducted according to a hole distribution drawing of a design drawing; thirdly, a drilling machine is used for being placed downwards from the interior of a sleeve to a hole opening of ariverbed face; fourthly, the drilling machine is started, a drill rod is placed downwards for drilling, and after drilling is completed, high-pressure hole washing is conducted, and drilling slag in ahole is cleaned up; and finally, the drill rod is lifted out, a steel flower pipe, a slurry conveying pipe and a sleeve housing material which are mounted are placed downwards to the hole bottom in asegmented manner through the lifting function of the drilling machine, then pressure testing is conducted firstly, and normal grouting is conducted after confirming that no error exists. By means ofthe high-pressure grouting device for deepwater karst fissure development geology and the construction method, the vulnerable geology such as karst caves and karst fissure fracture zones in deepwaterrivers can be reinforced, and in the construction process close to an existing bridge, the vibration influence of a newly-built bridge on an old bridge foundation in the pile foundation construction process can be reduced.

Description

technical field [0001] The invention mainly relates to the technical field of bridge foundation grouting, in particular to a geological high-pressure grouting device and a construction method for the development of deep-water karst fissures. Background technique [0002] At present, with the increasing development of bridges across rivers and rivers, it is common to build a new bridge around the existing bridges in urban bridges. However, in the face of complex geological conditions, before bridge construction, there will often be increased Difficulty in bridge construction, such as poor geology such as multiple karst caves and cracked fracture zones, which occur more frequently in karst landform areas. [0003] Therefore, it is necessary to design a device and construction method that can reduce the vibration impact on the old bridge foundation during construction, so as to prevent the new bridge from causing damage to the old bridge foundation during the pile foundation co...

Claims

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Application Information

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IPC IPC(8): E02D3/12
CPCE02D3/12E02D2250/003
Inventor 韦干何鹏宦剑鹏梁能峰邓龙清李向南吴回标周国友黄建
Owner SHANGHAI CIVIL ENG GRP FIFTH
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