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Capsule type anti-corrosion device with pile shoe and anti-corrosion and construction method using device

A technology of anti-corrosion device and construction method, applied in sheet pile wall, foundation structure engineering, construction and other directions, can solve the problems of insignificant anti-corrosion effect, high cost, difficult to meet the requirements of bearing and deformation performance, etc. Flexibility, reduced consumption and construction time, improved material and effect of anti-corrosion technology

Active Publication Date: 2011-04-06
CHINA JINGYE ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the passive protection measures such as linoleum insulation, glass fiber reinforced plastic protection and granite foundation adopted in some power and tunnel engineering projects in saline soil areas are not only expensive, but also have insignificant anti-corrosion effects, and the normal service life is usually less than 20 years
[0004] 1. Ordinary reinforced concrete pile foundations are severely corroded by chemical corrosion, physical erosion and denudation of the brine formation. Although the bearing capacity is relatively high, the normal service life is very short. Generally, it needs to be underpinned and overhauled once every 10 years or so, and the maintenance cost is very high. High;
[0005] 2. The vertical foundation piles used in the composite foundation treatment method are generally gravel piles. During the construction process, the reinforcement effect on the saline soil around the pile is not ideal, and the overall composite foundation of the gravel piles in the saline soil site Due to the limitation of the property, the long-term deformation of the foundation after loading is very large and it is not easy to be stable, and the pile body of the foundation pile is prone to bulge damage, and its bearing and deformation performance cannot meet the requirements;
[0006] 3. The fiber-reinforced composite coating anti-corrosion technology applied in bridge or port engineering has good engineering durability, but it is mainly suitable for prefabricated pile types, and the cost is high. It is suitable for general industrial and civil use in corrosive sites For building pile foundations, it is not applicable
[0007] 4. Although the method of improving the material properties of pile body concrete and stress reinforcement can meet the requirements of pile foundation anticorrosion, the manufacturing and installation process of pile body is complicated, and the cost of corresponding new anticorrosion materials is much higher than that of conventional concrete. Therefore, this method It cannot match the current pile foundation construction capacity and budget, and mature construction methods need to be further developed

Method used

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  • Capsule type anti-corrosion device with pile shoe and anti-corrosion and construction method using device
  • Capsule type anti-corrosion device with pile shoe and anti-corrosion and construction method using device
  • Capsule type anti-corrosion device with pile shoe and anti-corrosion and construction method using device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] See Figure 10a-10h , The construction method of the anticorrosive pile of the present invention includes the following steps:

[0061] A. Use a full set of pipe drilling rigs to drill holes of the design depth at the pile site through the steel casing 21 and the drill bit in the steel casing 21, with a diameter of 600~1500mm;

[0062] B. Lift the drill rod and bit out of the pile hole;

[0063] C. Insert the bladder anti-corrosion device with pile boots into the pile hole, and place the anti-corrosion pile shoe 3 at the preset position at the bottom of the pile hole;

[0064] D. Insert a concrete conduit 20 into the coating capsule body 1 of the capsule anticorrosion device with pile boots in the pile hole, and continuously pour expansive concrete 13 into the coating capsule body 1 through the concrete conduit 20, and pour the expansive concrete 13 Flow rate is 0.05~1.0m 3 / min, until the expanded concrete 13 in the coated capsule 1 approaches the top end of the coated capsule...

Embodiment 2

[0070] Referring to Figures 11a-11f, the construction method of the anticorrosive pile of the present invention includes the following steps:

[0071] A. Drill holes of the design depth at the pile site. The specific method is to place the long drill frame high-pressure jet grouting drill 22 in place, and use low-pressure jet wall-protecting mud or cement slurry 24 or cement slurry in the surface protection tube 23 at the pile site. Clear water 25 is drilled to the design depth;

[0072] B. Start the high-pressure water pump, the pump pressure is 20-40MPa and the low-pressure grouting pump, the pump pressure is 2-8MPa, and the speed: 8-25r / min, speed-up: 8-25cm / min while spraying and raising the drill pipe to the surface ;

[0073] C. Install the capsule anticorrosion device with pile boots and the vibration impact hammer 26 in place, and gradually vibrate the capsule anticorrosion device with pile boots in the pile hole grout under the vibration and impact of the vibration impact h...

Embodiment 3

[0080] See Figure 12a-12g , The construction method of the anticorrosive pile of the present invention includes the following steps:

[0081] A. Prepare the crane, multiple steel casing 21 and grab 27. Use the grab 27 to dig out the soil at the pile position in the first steel casing 21. As the soil in the steel casing is gradually discharged, the steel pipe is injected The slurry sinks to a point slightly higher than the surface, then the second section of steel casing 21 is hoisted, and the bottom end of the second section of steel pipe is connected to the top of the first section of steel pipe. After the connection is completed, continue to use the grab 27 The corrosive soil in the second section of the steel pipe in the deeper part is discharged from the pile hole, and so on, until the steel casing 21 sinks into the designed pile length depth;

[0082] B. Lift the grab 27 out of the pile hole;

[0083] C. Insert the bladder anti-corrosion device with pile boots into the pile h...

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Abstract

The invention relates to a capsule type anti-corrosion device with a pile shoe and an anti-corrosion and construction method using the device, the capsule type anti-corrosion device comprises a cylindrical coating capsule body made of anti-corrosion material, the inner surface and the outer surface of the coating capsule body are uneven surfaces, a supporting bottom is arranged at the lower part in the coating capsule body, the periphery of the supporting bottom is connected with the side wall of the coating capsule body, the hard anti-corrosion pile shoe is arranged in the coating capsule body, which is positioned at the lower end of the supporting bottom, at least one grouting pipe is arranged near to the outer side of the coating capsule body along the axial line direction the coating capsule body, the bottom end of each grouting pipe extends to the place which is near to the bottom end of the coating capsule body, and a low-pressure grouting hole and a plurality of high-pressure grouting holes are respectively arranged at the lower part of each grouting pipe, which is near to the supporting bottom. The invention aims at providing the capsule type anti-corrosion device with the pile shoe, which has reliable long-term anti-corrosion performance in a pile foundation and a composite foundation in a highly corrosive brine formation, and can reduce the expensive maintenance cost of the foundations of buildings and structures in the corrosive formation, and the anti-corrosion and construction method using the device.

Description

Technical field [0001] The invention relates to a corrosion-resistant and corrosion-resistant coating capsule anticorrosion device with pile boots used in pile foundations and composite foundations of various traffic engineering, industrial and civil construction projects, and an anticorrosive pile made by using the device and The corresponding construction method. Background technique [0002] At present, whether it is offshore engineering construction in sites that have water conservancy connections with seawater or large-scale infrastructure projects in inland salt lake areas, they are faced with the corrosion, erosion and denudation of general building materials by the brine stratum, and they are forced to Reduce the design service life of the building and cause high maintenance costs in the later stage of the project. Some surveys and related tests on buildings and structures in corrosive sites show that the brine or salt lake environment and the saline soil layer around th...

Claims

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Application Information

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IPC IPC(8): E02D5/72E02D5/34
Inventor 刘钟张义杨松黄新
Owner CHINA JINGYE ENG
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