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Safe standard penetration test device and test method

A penetration test device and safety standard technology, applied in the field of standard penetration test devices for in-situ safety in engineering geology, can solve problems such as difficulty in maintaining a vertical state and high safety risk of hammering, and achieve simple structure, strong practicability, Ease of use

Active Publication Date: 2017-09-12
WUHAN SURVEYING GEOTECHN RES INST OF MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the diameter of the drilled hole is much larger than the diameter of the probe rod, it is difficult to maintain a vertical state during the test, and the safety risk of hammering by manual control of the winch is high

Method used

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  • Safe standard penetration test device and test method
  • Safe standard penetration test device and test method

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Embodiment

[0038] Embodiment: The safety standard penetration test device in the embodiment of the present invention includes a frame 7, a horizontal movement mechanism of the frame, a piercing hammer 1, a guide rod 3, a pad 2, a piercing hammer lifting system, and penetration depth and hammer Strike number detection and display device; the frame horizontal movement mechanism is composed of a frame translation track 21 horizontally installed on the drilling rig mast 20, a chute 12 arranged on the back of the frame 7, and a telescopic oil cylinder 13. The frame is 1.8-2m high, rectangular in cross-section, 350-400mm long, and 250-280mm wide. The front of the frame is equipped with a piercing hammer limit guide rail 19 along the height direction. The cross-section of the piercing hammer limit guide rail 19 is triangular. 3-4 degree beams are set on both sides and the back to enhance the rigidity of the rack. The weight of the piercing hammer is 63.5kg, the cross section is a ring with an o...

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Abstract

The invention provides a safe standard penetration test device and a test method. The standard penetration test device comprises a rack, a rack horizontal movement mechanism, a pilereing hammer, a guide rod, a hammering cushion and a pilereing hammer lifting system, wherein a threaded opening, connected with a feeler lever or drill pipe connected with a penetrometer, is formed in the lower part of the hammering cushion; during the specific test, the standard penetration test device is mounted on a drilling machine gantry, a high-pressure oil pipe is utilized to connect the hydraulic motor of the pilereing hammer lifting system and the telescopic oil cylinder of the rack horizontal movement mechanism with a drilling machine hydraulic source through a valve; when the drilling machine drills to a desired standard penetration test depth, the standard penetrometer is connected onto the drill pipe, the telescopic oil cylinder pushes the rack to move along rack horizontal movement tracks until the guide rod is coaxial with the driving drill pipe of the drilling machine, the drill pipe on the standard penetrometer is enabled to be connected with the hammering cushion, and a power supply is turned on to enable the hammering test to be carried out. According to the safe standard penetration test device and the test method, the structure is simple, the automatic penetration is realized, the practicability is high, the testing speed is high, the safety risks are reduced greatly, and the testing reliability is improved.

Description

technical field [0001] The invention relates to the technical field of geotechnical exploration, in particular to a standard penetration test device and test method for in-situ safety of engineering geology. Background technique [0002] The standard penetration test is an important means of in-situ testing in engineering geological survey. The standard penetration test is to use a weight of 63.5kg to fall freely according to the specified drop distance (76cm), and drive a penetrator of standard specifications into the formation. The nature of the soil layer is determined according to the hammering number obtained by the penetrator at a certain depth. [0003] The traditional standard penetration test equipment consists of a standard penetrator, a penetrating rod and a piercer. During the test, the standard penetrator is connected to the penetrating rod and put into the borehole, and the penetrating hammer is hoisted by a drilling rig. The hammer was hoisted, and the guide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/02
CPCE02D1/022
Inventor 陈定安岳进松孙丽娜唐征宏白石磊陈洪全
Owner WUHAN SURVEYING GEOTECHN RES INST OF MCC
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