Drilled pile graded casing drilling perforating method

A technology for bored piles and bored piles, which is applied in drilling equipment and methods, drilling equipment, and earthwork drilling, etc., can solve the problems of large mud consumption, slow drilling speed, and high technical requirements, and achieves low safety risk, The effect of reducing mud discharge and simple process

Inactive Publication Date: 2014-10-01
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
View PDF5 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impact drilling method uses the impact hammer to repeatedly smash the rock formation, smashing the rock mass into debris, and then discharges the hole through the mud. This process consumes a lot of electricity, the drill b

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
  • Drilled pile graded casing drilling perforating method
  • Drilled pile graded casing drilling perforating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First, use a rotary drilling rig to drill a first-level hole pile at the pile position, with a diameter of 1.2m. During the drilling process, take out the core, and then re-drill the second-level hole on the first-level hole pile according to the diameter of the enlarged level. piles, three-level hole piles, four-level hole piles, and five-level hole piles. After the hole is completed, change the drill bit corresponding to the next level of drilling until the diameter of the sixth-level hole pile reaches 2.5m, which is the design diameter requirement of the drilled pile.

Embodiment 2

[0022] to combine figure 1 and figure 2 As shown, they are the elevation and plane structure diagrams of the holes drilled by the grading sleeve of the bored pile respectively. The rotary drilling drill adopts a drill bit with a diameter of 1.0m, and firstly drills a first-level hole pile 1 at the pile position with a diameter of 1.0m. , take out the rock core during the drilling process, then replace the drill bit with a diameter of 2.0m, re-drill the second-level hole pile 2 on the first-level hole pile 1, with a diameter of 2.0m, take out the rock core during the drilling process, and finally re-drill the second-level hole pile 2 on the first-level hole pile 1. Replace the drill bit with a diameter of 2.5m to drill a three-level bored pile 3 with a diameter of 2.5m, reaching the design diameter requirement of the bored pile.

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 discloses a drilled pile graded casing drilling perforating method. The diameter of a drilled pile is d. The method is characterized in that an auger drill is used for drilling in rock, and the hole piles are drilled in different steps and in different times; a first-stage hole pile is drilled in a part of a pile position, and the diameter of the first-stage hole pile is smaller than d; a rock core is taken out in the drilling process; then, each stage of the hole pile is sequentially drilled again on the former stage of the hole pile; in addition, the diameter of the hole pile is gradually increased grade by grade; the rock cores are taken out in the drilling process of each stage of the hole pile until the diameter of the drilled N-th-stage hole pile reaches d; and the diameter of each stage of the hole pile is 20 to 50cm greater than the diameter of the former stage of the hole pile. According to the method, the characteristics that a high-hardness rock stratum has strong pressure-resistant capability, i.e., high beating-resistant capability, but has poor shearing-resistant performance are utilized; the rock beating is changed into rock cutting and grinding; the hole piles are drilled from small diameters to large diameters; the hole pile rock cores are taken out ring by ring; and the perforating efficiency is improved. The method has the advantages that the process is simple; the energy is saved; the environment is protected; and the safety risk is small.

Description

technical field [0001] The invention relates to a construction method of a bored pile, in particular to a method for forming a hole of a bored pile suitable for medium and slightly weathered high-hardness rock formations. Background technique [0002] When bored piles are drilled in medium and slightly weathered high-hardness rock formations, the drilling is difficult, the construction speed is slow, and there are few optional methods. The commonly used methods at home and abroad are percussion drilling or blasting in artificial holes. The impact drilling method uses the impact hammer to repeatedly smash the rock formation, smashing the rock mass into debris, and then discharges the hole through the mud. This process consumes a lot of electricity, the drill bit wears seriously, and the mud consumption is large. Slow; the artificial hole blasting method requires a special blasting team for blasting, which has high safety risks, high technical requirements, and relatively high...

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): E21B3/00E21B7/00
Inventor 尉强邱志峪赵行文何鹏袁斌
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
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