Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Spiral self-drilling steel pile capable of being reinforced through diameter increasing, and construction method of spiral self-drilling steel pile

A construction method and self-drilling technology, which is applied in construction, sheet pile walls, and foundation structure engineering, etc., can solve the problem of limited diameter increase of helical blades, large slenderness ratio of helical self-drilling steel piles, and bending deformation of blades To achieve the effects of increased bending stiffness, improved corrosion resistance, and high lateral load-bearing capacity

Pending Publication Date: 2019-07-30
SOUTHWEST JIAOTONG UNIV
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the scope of increasing the diameter of the helical blade is limited. If the blade diameter is too large, it will easily cause the blade to bend and deform during the load-bearing process, and increasing the diameter will not significantly increase the bearing capacity.
After increasing the length of blades or piles, relatively high requirements are placed on the torque equipment for steel pile construction. Sometimes in limited space, the construction equipment may be difficult to operate and affect the construction progress
In addition, when the helical self-drilling steel pile reinforces a thick and weak foundation, the slenderness ratio of the helical self-drilling steel pile is too large, which is prone to buckling instability

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
  • Spiral self-drilling steel pile capable of being reinforced through diameter increasing, and construction method of spiral self-drilling steel pile
  • Spiral self-drilling steel pile capable of being reinforced through diameter increasing, and construction method of spiral self-drilling steel pile
  • Spiral self-drilling steel pile capable of being reinforced through diameter increasing, and construction method of spiral self-drilling steel pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0054] Embodiment 2: Different from Embodiment 1, the above-mentioned extension rod 200 includes two extension sections 201, and each extension section 201 is provided with a diameter-expanding guide plate 220, which is used for weak soil layers and easy side walls to collapse. According to the situation of the hole, when grouting according to the specific situation, the expansion guide plate 220 of a section of the extension section 201 will be continuously grouted when it enters the soil layer. At the same time, the grouting in the soil layer is uninterrupted, so that the connecting part of the reinforcing body 500 between the diameter-expanding guide plate 220 located below and the diameter-expanded guide plate 220 located above is uninterrupted and continuous.

[0055] A sleeve 300 is fitted at the connection between the extension sections 201 , and the sleeve 300 is connected with the two extension sections 201 .

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
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of foundation treatment, in particular to a spiral self-drilling steel pile capable of being reinforced through diameter increasing, and a construction method of thespiral self-drilling steel pile. The spiral self-drilling steel pile capable of being reinforced through diameter increasing comprises a spiral pile with a center shaft being provided with spiral blades, and further comprises a lengthening rod composed of one or more lengthening sections; the upper end of the spiral pile is connected with the lower end of the lengthening rod, wherein diameter-increasing guiding discs are arranged on the one or more lengthening sections in the lengthening rod; and the diameter-increasing guiding discs are each in a funnel shape, openings of the diameter-increasing guiding discs face upwards, and the bottoms of the diameter-increasing guiding discs are connected with the rod wall of the lengthening rod in a sealed mode. Through pile side grouting, slurry reaches the diameter-increasing guiding discs to form a reinforced body, the vertical limit bearing capacity, critical buckling load and transverse carrying capacity of the pile are improved, and compared with the mode for improving the bearing capacity through methods of increasing the number of the blades, the diameter of the blades and the pile length, the more economical and applicable effects are achieved so as to enable a foundation to be more stable.

Description

technical field [0001] The patent of the present invention relates to the field of foundation treatment, in particular to a diameter-expandable and reinforced spiral self-drilling steel pile and a construction method. Background technique [0002] Spiral self-drilling steel piles have wide adaptability, fast and efficient construction, small environmental impact, good overall economy, good durability and earthquake resistance. Under the call of the country to vigorously advocate environmental protection, spiral self-drilling steel piles have broad development prospect. After the foundation is reinforced by the spiral self-drilling steel pile, when the vertical load is applied, the proportion of the total side friction resistance provided by the central steel shaft is small because of the small side area. When the pile length is short, the spiral self-drilling pile is usually not considered The side resistance of the drilled steel pile contributes to the axial bearing capaci...

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
IPC IPC(8): E02D5/56E02D5/72
CPCE02D5/56E02D5/72
Inventor 刘凯文苏谦邵康陈德王武斌严炎黄俊杰杨智翔邱睿哲越斐周鹏飞熊志鹏
Owner SOUTHWEST JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products