Unlock instant, AI-driven research and patent intelligence for your innovation.

A preparation method for prestressed pipe piles used in chlorine salt erosion environment

A prestressed pipe pile and environmental technology, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as damage, potential safety hazards, thin prestressed steel pipe walls, etc., and achieve reasonable structural combination and performance. Effects of recession, carrying capacity stabilization

Active Publication Date: 2020-07-03
CHINA UNIV OF MINING & TECH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under these environmental conditions, the corrosion of aggressive ions will cause non-negligible damage to the pile body, seriously affect the quality of the pile body, endanger the bearing capacity and various performances of the pile body, and as time goes on, the damage phenomenon will continue. Aggravated, bringing serious safety hazards and seriously threatening the safety of the superstructure
[0004] Therefore, according to GB50046-2008 "Code for Anti-corrosion Design of Industrial Buildings", due to the problems of corrosion sensitivity of prestressed steel bars and thin pipe walls in pipe piles, SO 4 2- and Cl- are both strong corrosive media, prestressed concrete pipe piles should not be used in sulfate corrosion environments, and prestressed concrete pipe piles are not easy to use in chloride salt corrosion environments

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1. Prestressed pipe piles used in chloride-salt erosion environments, and foam concrete is poured into the reinforced concrete pipe body. The outer surface of the reinforced concrete pipe is wrapped with a protective layer. The protective layer is made of fiber-reinforced cement-based composite material. The fiber-reinforced cement-based composite material is compounded by mixing chopped organic fibers uniformly distributed in random directions into the cement, and the fiber content accounts for 5% by mass of the cement.

[0034] The cement is Portland series cement with strength grade not lower than 52.5. The organic fiber is one or more of polypropylene fiber, polyacrylonitrile fiber, ultra-high molecular weight polyethylene fiber, polyvinyl alcohol fiber, polyester fiber or polyoxymethylene fiber.

[0035] The preparation method process of the prestressed pipe pile used in the chloride corrosion environment is as follows:

[0036]Step 1. Prepare fiber-rein...

Embodiment 2

[0044] Embodiment 2. is basically the same as Example 1, the difference is: the fiber content accounts for 3% of the mass percentage of cement, the added polymer emulsion accounts for 5% of the powder material mass percentage, and the water reducer content accounts for 5% of the powder. The mass percentage of bulk material is 1%, and the water-cement ratio (the mass ratio of water to powder material is 0.25.

Embodiment 3

[0045] Embodiment 3. is basically the same as Example 1, the difference is: the fiber content accounts for 8% of the mass percentage of cement, the added polymer emulsion accounts for 15% of the powder material mass percentage, and the water reducer content accounts for 15% of the powder. The mass percentage of bulk material is 2%, and the water-cement ratio (the mass ratio of water to powder material is 0.40.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
power levelaaaaaaaaaa
Login to View More

Abstract

The invention discloses a prestressed pipe pile for a chlorine salt erosion environment, and a preparation method thereof, and belongs to the field of civil engineering material manufacturing. A fiber-reinforced cement-based composite-material protection layer with a certain thickness and resistant to chloride penetration is formed outside a pipe body, and a reinforced concrete pipe body born inside is isolated from an external erosion environment. After the prestressed pipe pile is sunk in a construction site, foam concrete is fully filled in the pipe diameter, so that the direct damage of the permeation of underground water to the inner wall of the pipe body is avoided, and then the service life of the pile body in the chlorine salt erosion environment is prolonged. The prestressed pipepile disclosed by the invention is simple and convenient in construction process, and capable of realizing efficient industrialized production; and the pipe body is high in forming quality, durable inuse, and capable of meeting the requirements on the durability of the pile body in various chlorine salt erosion environments.

Description

technical field [0001] The invention relates to a prestressed pipe pile, in particular to a prestressed pipe pile used in a chloride-salt erosion environment, and belongs to the technical field of civil engineering pile foundations. Background technique [0002] Pile foundations have been widely used in various projects today because they can overcome the influence of adverse geological conditions and provide high bearing capacity. Among them, tubular piles are an important type of pile foundation. Due to the characteristics of low water-cement ratio centrifugal forming, internal prestressed steel cage and industrial control production, the pile body has good forming quality, high strength, and convenient and fast construction. Various types of engineering geological bearing capacity needs. With the rapid development of my country's economic construction, the continuous advancement of urbanization and coastal development, the demand for pipe piles is huge. According to inco...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/58E02D5/60E02D5/50C04B28/04
CPCC04B28/04E02D5/50E02D5/58E02D5/60C04B24/24C04B16/06C04B2103/302C04B14/02
Inventor 姬永生刘本琳石博文张莉吴守荣徐圣楠张领雷黄国栋刘丽丽李军李果刘志勇
Owner CHINA UNIV OF MINING & TECH