Standard penetration test device for partitioning rock weathering degree

A standard penetration test and weathering degree technology, which is applied in foundation structure engineering, on-site foundation soil survey, construction, etc., can solve the problems such as the difficulty of delineating the boundary line in the transition zone, and achieve simple structure, easy installation and reading, The effect of easy operation

Active Publication Date: 2013-12-25
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the classification of rock weathering degree mostly adopts the qualitative evaluation method of engineering geology, which is comprehensively analyzed and determined from the aspects of rock structure, color, mineral composition, joint development degree and excavation difficulty, and the weathering degree is classified based on these qualitative uncertain judgments With a lot of randomness, especially when there is a gradual relationship between the two weathering grades, it is very difficult to delineate the boundary line in the transition zone.

Method used

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  • Standard penetration test device for partitioning rock weathering degree
  • Standard penetration test device for partitioning rock weathering degree
  • Standard penetration test device for partitioning rock weathering degree

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Embodiment

[0018] The main structure of this embodiment includes a guide rod 1, a piercing hammer 2, a hammer pad 3, a probe rod 4, a water outlet 5, and a penetrator 6; the guide rod 1 is embedded in the middle of the piercing hammer 2 for controlling The free fall direction of the piercing hammer 2; the bottom of the piercing hammer 2 with an automatic decoupling device is provided with a hammer pad 3, the piercing hammer 2 can freely fall on the hammer pad 3, and the weight of the piercing hammer 2 is 63.5kg. The drop distance is 76cm; the bottom of the hammer pad 3 is fastened with a screw to form a probe rod 4; the probe rod 4 is provided with a scale line for visually observing the penetration depth, and the diameter of the probe rod 4 is 42mm; The penetrator 6 with the hollow metal tube structure at the cutting edge and the probe rod 4 are connected and fastened by screws. The penetrator 6 is made of ultra-high-strength alloy steel. The penetrator 6 has a length of 300mm and an inn...

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Abstract

The invention belongs to the technical field of in-situ test equipment, and relates to a standard penetration test device for partitioning rock weathering degree. A guide rod is embedded into the middle of a piercing hammer; the bottom of the piercing hammer provided with an automatic unhooking device is provided with a hammer cushion; the bottom of the hammer cushion is firmly connected with a penetration sounding rod by adopting a screw thread; the penetration sounding rod is provided with scale lines; a penetrometer which is provided with a cutting edge and has a hollow metal tube structure is firmly connected with the penetration sounding rod through a screw thread; a water outlet hole is formed in the top end of the penetrometer. The standard penetration test device is simple in structure, is convenient to operate, install, test and read, and can be used for directly partitioning the weathering degree of weathered rock, dividing strongly-weathered rock and medium-weathered rock and subdividing strongly-weathered rock into upper, middle and lower subzones.

Description

Technical field: [0001] The invention belongs to the technical field of in-situ test equipment, and relates to a standard penetration test device for classifying the degree of weathering of rocks, which is used for judging the degree of weathering of rocks in weathered rock areas and classifying types, making up for the fact that the existing equipment can only be applied to sandy soil, Insufficient cohesive soil and weathered rock residual soil can directly divide the weathering degree of weathered rocks, and can subdivide the upper, middle and lower three subzones of strongly weathered rocks for relatively hard rocks in strong to moderate weathering. Background technique: [0002] At present, the classification of rock weathering degree mostly adopts the qualitative evaluation method of engineering geology, which is comprehensively analyzed and determined from the aspects of rock structure, color, mineral composition, joint development degree and excavation difficulty, and ...

Claims

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Application Information

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IPC IPC(8): E02D1/02
Inventor 张明义白晓宇张亚妹汤洪霞
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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