Industry policy "Pile
"Pile-driver," the new standard is the national standard GB/T8517-2004 "Pile-driver" (hereinafter referred to as the original standard) amendment, the manuscript was passed in June 2007 a review of the revised The new standards will also be converted to mechanical industry (JB) standard.
Pile-directional vibration is generated (usually vertical vibration) is used to pull piles of pile hammer Shen, China's production of the largest and most widespread use of construction equipment based one. The amendment, first, to reflect the parties to face the new requirements Vibratory Pile Hammer, the second is to ensure safe use. Revised or new standard reference to the main reference of the European EN996: 1995 "piling equipment safety regulations", GB/T7920.6-2005 "Building construction machinery and equipment piling equipment Terminology and commercial specifications" (modified with ISO11886: 2002), GB7920 .6-87 "Piling Machinery terms" and other information related to the content.
(1) is applicable to a shaker device for the hydraulic motor drive to the vibration of pile hammer.
(2) increase the vibration pile hammer, electric Vibratory Hammer, Hydraulic Vibratory Hammer, mechanical shaker, chuck, eccentric torque, vibration frequency, amplitude and vibration force of the term.
(3) cancellation of the relevant model code provisions of the basic parameters.
(4) an increase of fasteners, the exposed shield transmission parts, vibration frequency deviation, electrical system, instructions, operation and maintenance requirements.
(5) refinement of the noise limits.
(6) significantly increased the design, manufacture, use and maintenance of safety requirements.
2 the application of new standards
2.1 extend the scope of application
New standards apply to a rotary mechanical shaker and when the pile and the pile of sinking and drawing a fixed link with the hammer vibration of pile hammer, thus including the exciter drive power plant for the two types of vibration motor or hydraulic motor pile hammer. Standards apply only to the original drive for the motor exciter vibration pile hammer.
4.8 chuck and hydraulic system
Chuck if a problem can occur pile off, dumping and other accidents, the relevant provisions of the original standard few. Increased under the new standards EN996 requirements.
(1) chuck clamping force, in any condition should be at least 1.2 times the actual exciting force.
(2) hydraulic pressure generated by the system should provide at least the minimum required clamping force, and should set the device to ensure, as long as the clamping chuck, hydraulic system will automatically maintain the pressure to meet the minimum clamping force.
(3) should be set to prevent the chuck unexpectedly in the course of their work in safety.
(4) should be set even if the loss of hydraulic pressure to enable the pipeline to maintain a state of clamping chuck safety devices.
(5) should be set indicating device shows chuck hydraulic cylinder pressure.
4.9 Electrical System The relevant provisions of the original standard
few new standards according to EN996 and other relevant standards, an increase of electrical system requirements.
(1) electronic control box should be able to guard against rain, dust control equipment and components for electrical hazard. Electronic door locking devices should be, and is open to use tools, keys, or in the operating position by the operator's operation.
(2) motors, electrical components (not including electronic components) and electrical lines to ground insulation resistance shall not be less than 1M ; power cables between two adjacent wire insulation resistance shall be not less than 2M .
(3) should be set short-circuit, over-current, zero, loss of pressure and lack of, wrong, phase protection.
(4) There should be dedicated into the line of breakers.
(5) remote control vibrating pile hammer, must have the control signal failure in the vibration of pile hammer to ensure that the functions or devices to stop functioning.
5 Manual Manual is an integral part of products, each product should be provided with instruction manual. Manual at least in product transportation, installation, operation and maintenance and so on, given all safety-related data, procedures, methods, determine the rules and precautions to ensure the safety of construction workers. However, there are the vibration of pile hammer is too simple instructions. Developed countries attach great importance to the product instructions, especially those involving personal safety aspects. Therefore, under the new standards EN996 and other relevant standards, an increase of this article. More detailed provisions of this article, but the developed countries demand the product manual comparison, there are still gaps.
6 Use and maintenance Proper use and maintenance, is an important part of ensuring safety. New standards and related according to EN996 standard, increased the use and maintenance requirements, with emphasis on safety requirements.
6.1 installed and in use for special occasions
(1) Vibratory Pile Installation by qualified personnel to carry out. Installation, should confirm hanging Vibratory Pile pile lifting equipment rack or pile in the lifting and pulling piles have sufficient stability and ability to work, to confirm the rope hanging Vibratory Pile Hammer, spreader, rope and other end fixed-line manual and related standards.
(2) in the petrochemical factories, mines, the ships and offshore installations and other special locations and environments of the vibration pile hammer shall conform to relevant standards, laws and manufacturer requirements, such as corrosion, explosion-proof requirements.
6.2 operation and use of
(1) the operator or operations command personnel should be able to work on their own clearly observed in the functioning of Vibratory Pile Hammer, relevant staff position and work.
(2) can not enter into the bottom of Vibratory Pile Hammer.
(3) for the protection of Vibratory Pile hoisting equipment, need to start vibrating pile hammer load, must first confirm the suspension device can withstand the vibration of pile hammer of the exciting force and possible resonance effects. Confirmed to start the vibration load pile hammer, nor frequent and prolonged load no-load starting operation.
(4) Pile-pile shall not exceed the specified pull force to use; not be vibrating pile hammer for the lifting operation; will be allowed to transform the vibration pile hammer.
(5) Pile-free suspension in the next stop operations, not the pile of folders in the chuck.
(6) even if the chuck clamping has entered the soil in the pile, pile vibration from the pile hammer shall not frame or suspension of lifting equipment. But can determine the vibration of pile hammer pile and except in the case will not be dumping.
(7) Power source shut down, the hammer and the pile should be piping system vibration may cause harm to human load unload.
6.3 Inspection and Maintenance
(1) should be carried out routine checks and regular inspections; inspection, repair and maintenance by qualified personnel
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