A Construction Method of Underwater Coating for Reducing Friction Force of Pile Body

A technology of negative friction force and construction method, which is applied in the direction of geotextile, sheet pile wall, foundation structure engineering, etc., can solve the problems of collision damaged pile body investment, failure to popularize, and poor fixation, etc., to achieve small investment and reduction The effect of small adverse effects and convenient material collection

Active Publication Date: 2020-04-10
长江河湖建设有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For measures to reduce the negative friction of existing pile foundations under the action of surcharge on soft soil foundations, for pile foundations with very strict settlement requirements, the soil around the pile is generally reinforced or the method of supplementing piles is used; for pile foundations with general settlement requirements At present, the steel casing method is commonly used, which can reduce the influence of negative friction, but because the casing method has the disadvantages of poor fixation, easy inclination, collision damage to the pile body, and large investment, it is often unavoidable in engineering practice. To the popularization, people tend to adopt the method of soil reinforcement around the pile or the method of supplementing piles to deal with this kind of pile foundation, resulting in great waste

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Construction Method of Underwater Coating for Reducing Friction Force of Pile Body
  • A Construction Method of Underwater Coating for Reducing Friction Force of Pile Body
  • A Construction Method of Underwater Coating for Reducing Friction Force of Pile Body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The part of the pile body that is located underwater is the underwater pile body 1. A construction method for underwater coating that reduces friction on the pile body in this embodiment includes:

[0024] A geotextile sheet matching the size of the underwater pile body 1 is cut from the geotextile 4, and the surface of the geotextile sheet is sequentially coated with cold primer and the lower asphalt layer 3 is laid. The processed asphalt-coated geotextile sheet is made of Transport the asphalt-coated cloth to the construction site manually, wrap the underwater pile body 1 tightly and reinforce it; during construction, several geotextile sheets are constructed sequentially from the lower end of the underwater pile body 1 to the upper section, Two adjacent geotextile sheets are lapped together. If necessary, two layers of geotextile sheets can be wrapped at the same section height.

[0025] After the geotextile sheet is smeared with cold primer, the first layer of asph...

Embodiment 2

[0032] Heat the asphalt to 165°C to lay the first asphalt layer 3.1. The softening point of the asphalt used in the first asphalt layer 3.1 is 55°C, and the penetration at 25°C is 60dmm.

[0033] In this embodiment, the asphalt is heated to 165° C., and poured on the surface of the pile body above the water after the cold base oil has penetrated or volatilized, and the thickness of the upper asphalt layer is 9 mm. The asphalt used in the upper bituminous layer has a softening point of 55°C and a penetration of 60dmm at 25°C. The geotextile 4 is wrapped on the surface of the asphalt layer and finally reinforced outside the geotextile 4 . Other contents of the technical solution of this embodiment are the same as those of Embodiment 1.

Embodiment 3

[0035] Heat the asphalt to 180°C to lay the first asphalt layer 3.1. The softening point of the asphalt used in the first asphalt layer 3.1 is 60°C, and the penetration at 25°C is 70dmm.

[0036] Heat the asphalt to 180°C and pour it on the surface of the pile body above the water after the cold base oil has penetrated or volatilized. The thickness of the upper asphalt layer is 10mm. The asphalt used in the upper bituminous layer has a softening point of 60°C and a penetration of 70dmm at 25°C. The geotextile 4 is wrapped on the surface of the asphalt layer and finally reinforced outside the geotextile 4 . Other contents of the technical solution of this embodiment are the same as those of Embodiment 1.

[0037] Through the construction method described in this embodiment, an underwater coating structure that reduces the frictional force of the pile body is formed on the surface of the underwater pile body 1. The coating structure includes:

[0038]The surface of the underwat...

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
thicknessaaaaaaaaaa
softening pointaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses an underwater coating construction method for reducing negative friction force of a pile body. The underwater coating construction method comprises the following steps that geofabric pieces are cut out from geofabric, wherein the sizes of the geofabric pieces are matched with the size of the underwater pile body, firstly, the surfaces of the geofabric pieces are coated with cold base oil, after the cold base oil on the surfaces of the geofabric pieces permeates or volatilizes, then a first layer of pitch is laid, then a second layer of pitch is laid, the geofabric pieces dried on the pitch layers cover the surface of the underwater pile body and are reinforced, during construction, the multiple geofabric pieces are constructed from the lower end to the upper end of the underwater pile body in sequence, and the upper and lower adjacent geofabric pieces are in lap joint. The underwater coating construction method for reducing the negative friction force of the pile body is simple in technology, convenient to operate and low in investment, and through field monitoring on an actual project, it shows that the underwater coating construction method for reducing the negative friction force of the pile body is high in maneuverability and obvious in effect.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a method for reducing the adverse effect of negative friction by applying asphalt on a pile body and wrapping it with geotextile. Background technique [0002] Large-area surcharge on deep soft soil foundation, due to inconsistent settlement of piles and soft soil, negative friction will adversely affect the existing pile foundation above the neutral point, increase the axial force of the pile body, and reduce the load bearing capacity of the pile foundation force, which poses a threat to pile foundation engineering. [0003] How to take measures to reduce the impact of negative friction on piles is a technical issue that needs to consider not only safety and reliability, but also economical rationality. For measures to reduce the negative friction of existing pile foundations under the action of surcharge on soft soil foundations, for pile foun...

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): E02D5/60E02D27/52
CPCE02D5/60E02D27/52E02D2300/009E02D2300/0098
Inventor 范志强张继良詹敏利史可平周定刚余娟郭锐
Owner 长江河湖建设有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap