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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
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The occurrence of "drill blocking" or "cavitation" will cause large deviations in the measurement results, thereby affecting the construction quality, but the existing CFG drilling rigs cannot provide effective prompts

Method used

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  • 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

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Embodiment Construction

[0059] The basic idea of ​​the present invention is to automatically control the drilling and pulling back of the drill pipe; obtain reliable mud pressure at the bottom of the drill pipe by detecting the pull force of the main winch, obtain the mud pressure deviation at the bottom of the drill pipe and control it as the control object, and realize The drill pipe is pulled back at the expected speed, and an appropriate and stable pressure is maintained at the concrete outlet at the bottom of the drill pipe.

[0060] For the convenience of describing the present invention, relevant terms are explained as follows:

[0061] PID control, that is, proportional, integral, differential control, also known as PID regulation. Among them, P represents the proportional gain, the proportional adjustment setting is large, and when the system deviates, the adjustment can be accelerated to reduce the error, but too large proportional gain will cause the system to be unstable; I represents the...

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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

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Application Information

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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
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