Bored pile control method, control system and drill using the control system

A control system and control method technology, applied to the automatic control system of drilling, drilling equipment and methods, sheet pile walls, etc., can solve the problems of deviation of measurement results, failure of CFG drilling rigs to provide effective prompts, and influence on construction quality, etc., to achieve The effect of high accuracy, reducing the number of construction personnel and reducing construction costs

Inactive Publication Date: 2009-03-25
BEIJING SANY HEAVY MASCH CO LTD
View PDF0 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The occurrence of "drill blocking" or "cavitation" will cause large deviations in the measurement results, th

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
  • Bored pile control method, control system and drill using the control system
  • Bored pile control method, control system and drill using the control system
  • Bored pile control method, control system and drill using the control system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0059] The basic idea of ​​the present invention is to automatically control the drilling and retracting of the drill rod; obtain reliable mud pressure at the bottom of the drill rod by detecting the main hoisting force, obtain the mud pressure deviation at the bottom of the drill rod, and use it as the control object to control. The drill pipe is lifted back at the desired speed to maintain a proper and stable pressure at the concrete outlet at the bottom of the drill pipe.

[0060] To facilitate the description of the present invention, the relevant terms are first explained as follows:

[0061] PID control, namely proportional, integral, and differential control, also known as PID regulation. Among them, P represents the proportional gain, the proportional adjustment setting is large, when the system has a deviation, the adjustment can be speeded up to reduce the error, but an excessive proportional gain will cause the system to be unstable; I represents the integral time, the ...

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

No PUM Login to view more

Abstract

The invention discloses a control method for drilling and pile formation, which is used for a CFG construction method. The control method comprises a drilling process and a drill lifting and pouring process, wherein the drilling process comprises the following steps of acquiring a current drilling depth of a drill rod in real time; judging whether the current drilling depth of the drill rod is more than or equal to a preset drilling depth and sending out a drilling-stopping control signal if yes so as to control a drilling machine actuator to stop working; and the drill lifting and pouring process comprises the following steps of acquiring the main hoisting tension of a drilling machine in real time; acquiring the pressure of slurry on the bottom of the drill rod according to the main hoisting tension; comparing the pressure of the slurry on the bottom of the drill rod with the target pressure of the slurry on the bottom of the drill rod so as to acquire the pressure deviation of the slurry on the bottom of the drill rod; and taking the pressure deviation of the slurry on the bottom of the drill rod as a control object so as to control the drilling machine actuator to lift the drill rod at corresponding speed. By efficiently controlling the drilling and back lift of the drill rod, the method can reduce the number of constructors, lower labor intensity as well as construction cost and improve construction efficiency and pile formation quality. The invention simultaneously discloses a control system for drilling and pile formation, as well as a drilling machine using the control system.

Description

technical field [0001] The invention relates to the field of automatic control capable of performing or improving drilling operations without human operation, in particular to a drilling and piling control method, a control system and a drilling rig using the control system, especially suitable for use in CFG construction methods. Background technique [0002] With the development of building construction technology, the application of CFG piles is becoming more and more extensive. The so-called CFG pile refers to cement, flyash, gravel concrete pile (cement flyash gravel pile); the so-called CFG construction method refers to the construction method of long spiral drilling center pressure irrigation. The specific construction process is to drill the drill pipe first. Enter the specified elevation underground, and then lift the drill pipe upwards; during the process of lifting, concrete is injected into the center hole of the drill pipe with a concrete pump truck at the same ...

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): E02D5/34E21B44/00E21B7/00
Inventor 黎中银黄志明冯志雄田毅安贵平
Owner BEIJING SANY HEAVY MASCH 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