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Full-flow penetrometer for fish float shaped probes

A penetrometer and drifting technology, which is applied in the field of construction engineering, can solve the problems that full flow affects the accuracy of soil strength testing, and achieve the effects of shortening the test operation process and test cycle, accurate test results, and improved accuracy

Pending Publication Date: 2019-07-05
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a full-flow penetrometer with a float-shaped probe, which overcomes the stagnation area on the upper part of the probe due to the low strength of the soil, and the failure of full flow to affect the accuracy of the soil strength test

Method used

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  • Full-flow penetrometer for fish float shaped probes
  • Full-flow penetrometer for fish float shaped probes
  • Full-flow penetrometer for fish float shaped probes

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Embodiment Construction

[0015] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0016] exist figure 1 Among them, the rigid thin rod 2 is sufficiently rigid and threaded at both ends, so that one end of the rigid thin rod 2 is threaded with the end of the float-shaped probe 1, and the other end is connected with the pressure sensor 6 through the connecting bolt 4, and the pressure sensor 6 is a tension-compression sensor. A layer of cylindrical metal casing 3 is put on the outer side of the rigid thin rod 2 and the pressure sensor 6, leaving a gap of 1 mm between the cylindrical metal casing 3 and the rigid thin rod 2 to prevent the gap between the rigid thin rod 2 and the cylindrical metal casing 3 There is friction between them, affecting the accuracy of the test. And the inner and outer surfaces of the cylindrical metal shell 3 are smooth, so as to reduce the influence of outer friction resistance and inner friction. There...

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Abstract

The invention provides a full-flow penetrometer for fish float shaped probes, and belongs to the technical field of construction engineering. The penetrometer mainly consists of a fish float shaped probe, a rigid slender rod, a cylindrical metal shell, a pressure sensor and a pedestal. For soil with low intensity, a conventional T-bar forms a retention area on the upper part of the probe when being pulled out, and the full flowing of the soil cannot be performed on the surface of the probe, so that influences can be generated on testing results; thus, through the adoption of the fish float shaped probe, and as the end part of the fish float shaped probe is in arc-shaped, the full flowing of the soil can be generated on the surface of the probe when the penetrometer is pulled out, so that the accuracy of testing can be enhanced; and the testing of soil intensity can be simple and convenient by using the penetrometer, so that test processes and periods can be greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and relates to a full-flow penetrometer with a float-shaped probe. Background technique [0002] The full-flow penetrometer is a new type of strength testing element that has emerged in recent years, and has been widely used in the in-situ testing of marine soft soils and the testing of geotechnical centrifugal model soil samples at home and abroad. It does not need to correct the overlying pressure, can obtain the continuous shear strength of the soil, and has a strict plastic solution due to the full flow mechanism during the penetration process, and can quickly obtain the remodeling resistance of the soft clay through the cyclic penetration test, etc. advantage. Generally, spherical probes or cylindrical probes are used. The initial penetration resistance can be obtained by penetrating the probe into the soil to be tested, the initial pull-out resistance can be obtained by p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/48
CPCG01N3/02G01N3/48
Inventor 赵维刘春鹏王润清
Owner DALIAN UNIV OF TECH