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Feeler lever correction device for cone dynamic penetration test and standard penetration test and application

A standard penetration test and dynamic penetration technology, applied in the field of foundation soil survey, construction, infrastructure engineering, etc., can solve the problems of reduced work efficiency, poor accuracy, hidden safety hazards, etc., to ensure vertical stability, reduce Skewness, the effect of improving stability

Inactive Publication Date: 2019-01-25
昆明恒泰钻探有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the key factors is that the deflection of the probe rod cannot exceed 2%, so the verticality of the probe rod is highly required. However, the existing technology is to artificially control the stability and verticality of the probe rod, which not only has poor accuracy, but also There are also potential safety hazards, and the current devices and equipment for improving verticality are not suitable for use on drilling rig equipment and need to be erected separately, which not only increases economic costs, but also reduces work efficiency

Method used

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  • Feeler lever correction device for cone dynamic penetration test and standard penetration test and application
  • Feeler lever correction device for cone dynamic penetration test and standard penetration test and application
  • Feeler lever correction device for cone dynamic penetration test and standard penetration test and application

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Embodiment 1

[0032]Embodiment 1 A probe rod guiding device for cone dynamic penetration test and standard penetration test, comprising two oppositely placed guiding cylindrical blocks 2, and a concave cylindrical guiding block is provided in the middle of the guiding cylindrical block Groove 3, the outer diameter of the straightening cylindrical block is adapted to the inner diameter of the drill groove drilled by the drilling machine, so that the two straightening cylindrical blocks are fitted and installed in the drilling groove 6 after being joined, and the straightening cylindrical block The upper outer edge of the block is provided with a flange segment 4 whose outer diameter is not smaller than the inner diameter of the outer drilling groove. When in use, the two halves of the oppositely placed guide cylinder block 2 are clamped on the shaft body of the conical power penetrator, and then placed into the drill groove 6. The outer wall of the guide cylinder block 2 and the inner wall of...

Embodiment 2

[0033] Embodiment 2: as Figure 1~5 As shown in the figure, a probe rod guiding device for cone dynamic penetration test and standard penetration test includes an outer sleeve 1 and two semi-opposite guiding cylindrical blocks 2, and the middle part of the guiding cylindrical block 2 is provided with Concave cylindrical alignment groove 3, the outer diameter of the alignment cylindrical block 2 is adapted to the inner diameter of the outer sleeve 1, so that the two alignment cylindrical blocks 2 are fitted and installed in the outer sleeve 1 after being joined , the upper outer edge of the straightening cylindrical block 2 is provided with a flange section 4 with an outer diameter not smaller than the inner diameter of the outer sleeve 1, and a flange connection plate 5 is installed on the outer edge of the upper port of the outer sleeve 1. The inner diameter of the cylindrical guiding groove 3 is 1-2 mm larger than the outer diameter of the probe rod 18, and the outer diamete...

Embodiment 3

[0036] Embodiment 3: as Figure 6 As shown, on the basis of Embodiment 1, two semi-opposite guiding upper column blocks 7 are connected above the flange land 5, and the bottom edge of the guiding upper column block 7 is provided with a The connecting plate 5 is connected to the flange connecting plate 5 through a number of first bolt holes installed in abutting connection with the flange connecting plate 5, and the bottom of the upper column block 7 is provided with a fixed ring 9 extending parallel to the outside. The fixed ring 9 is fixed by several second bolts 10 and passed through the fixed ring 9 and the flanged plate 5 in turn, and finally installed on the support frame 11 at the bottom of the drilling machine 19, the outer diameter of the upper column block 7 is larger than the On the outer diameter of the outer sleeve 1 , the middle part of the inner surface of the upper alignment column 7 is provided with an alignment groove 12 consistent with the cylindrical alignme...

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Abstract

The invention provides a feeler lever correction device for cone dynamic penetration test and standard penetration test and application. The feeler lever correction device comprises an outer sleeve and two correction cylinder columns which are opposite in half, an inwards-concave cylindrical correction groove is formed in the middle of each correction cylinder block, outer diameter of each correction cylinder block is matched with inner diameter of the outer sleeve to enable the correction cylinder blocks after being connected to be mounted in the outer sleeve in a matched manner, a flange section with outer diameter not smaller than the inner diameter of the outer sleeve is arranged at the upper-portion outer edge of each correction cylinder block, and a flange connection disc is mountedat the outer edge of the upper port of the outer sleeve. The feeler lever correction device can be conveniently and quickly applied on a drilling machine for the cone dynamic penetration test and thestandard penetration test. The feeler lever correction device can ensure skewness degree of a feeler lever not to exceed 2%, and perpendicularity of the feeler lever is improved effectively during thecone dynamic penetration test and the standard penetration test, so that accuracy and reliability of the tests are improved.

Description

technical field [0001] The invention relates to the technical field of rock and soil testing in engineering survey, mainly relates to the field of static and dynamic penetrating tests, in particular to a probe rod guiding device for conical dynamic penetrating tests and standard penetration tests. Background technique [0002] Standard penetration test (SPT) is a kind of dynamic penetration test, and it is a method to measure the foundation bearing capacity of sand or clayey soil on site. This method has been included in China's "Code for Design of Industrial and Civil Building Foundations". It utilizes a certain hammering function (hammer weight 63.5kg, drop distance 76cm) to place a split-tube penetrator of a certain specification (the outer diameter of the split tube is 51mm, the inner diameter is 35mm, the length is greater than 457mm, and the length of the lower end is 76mm). , blade angle 18°~20°, pipe shoe with blade end thickness of 1.6mm, and drill pipe on the uppe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/00
CPCE02D1/00
Inventor 苗飞谷海俊李育红邵云海丁飞陈坤孙国清唐源杨永灿李小军杨熙桐张俊
Owner 昆明恒泰钻探有限公司
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