Telescopic probe for in-situ shear test of offshore vane

Abstract

A marine vane in-situ shear test telescopic probe is characterized by comprising an outer guide rod, an inner guide rod, a telescopic wire and a vane probe, the vane probe is connected with one end of the outer guide rod, a strain inductor is arranged in the vane probe, the inner guide rod is connected in a center hole formed in the outer guide rod, and the inner guide rod is connected with the telescopic wire. The inner guide rod is arranged to be of a hollow structure, a telescopic wire is arranged in the inner guide rod, one end of the telescopic wire is connected with the strain inductor, the force transmission guide rod provided with the vane probe is designed to be the telescopic guide rod composed of the inner guide rod and the outer guide rod, so that the vane probe has certain flexibility; the probe end of the vane is not influenced by the up-and-down movement of the force generating end through the telescopic up-and-down movement of the telescopic guide rod, so that the vane head can be more stably arranged at a test position, and the influence of inaccurate test data caused by the fluctuation and swinging of the floating platform is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to soft soil body anti -shear parameter uses equipment technical field especially, relates to offshore vane shear test telescopic probe. BACKGROUND

[0002] Vane shear test is a kind of test for determining the undrained shear strength and sensitivity of saturated soft cohesive soil with vane, and belongs to one kind of soil in-situ testing test.It is to press the vane probe into the soft soil at the bottom of the borehole, rotate at a uniform speed, measure the torque required when rotating through a certain measurement system, until the soil failure, and then calculate the shear strength of the soil.

[0003] The traditional vane probe needs to be connected with the vane head at one end and then shear test is carried out, and the other end of the vane probe is installed on the force end of the test instrument.When the force end fluctuates or swings, the vane head will also move up and down, cannot be fixed at the test position, and cannot accurately carry out the test.

[0004] Since offshore engineering drilling work is usually completed on a floating platform, the floating platform has the characteristics of fluctuation and swing, so that the vane head end will move up and down with the force transmission guide rod, so that the test device cannot be fixed, resulting in inaccurate test structure, therefore, the traditional instrument needs very stable sea conditions for offshore vane shear test, but such sea conditions are rare, and a special drilling platform for fixing is usually needed, which not only makes the test efficiency low, but also has high cost of building a special platform, therefore, the offshore vane in-situ shear test telescopic probe is provided. Utility model content

[0005] According to the above technical problems, the offshore vane in-situ shear test telescopic probe is provided, which can transmit relatively stable torque to the vane head under the condition that the drilling floating platform fluctuates and swings to a certain extent, so as to reduce the influence of the fluctuation and swing of the floating platform on the accuracy of the test data.

[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] The offshore vane in-situ shear test telescopic probe comprises an outer guide rod, an inner guide rod, a telescopic guide wire and a vane probe, the vane probe is connected with one end of the outer guide rod, a strain sensing body is arranged in the vane probe, the inner guide rod is connected in the central hole arranged on the outer guide rod, the inner guide rod is arranged as a hollow structure, the telescopic guide wire is arranged in the inner guide rod, one end of the telescopic guide wire is connected with the strain sensing body,

[0008] One end of the inner guide rod penetrates from the end of the outer guide rod and is connected with the connecting block,

[0009] The central hole of the outer guide rod is designed as a hexagonal hole structure, and the outer part of the inner guide rod is designed as a hexagonal structure.

[0010] Further, the connection between the outer guide rod and the inner guide rod is filled with lubricating oil to reduce the friction of the longitudinal sliding between the inner guide rod and the outer guide rod.

[0011] Specifically, the other end of the telescopic guide is connected with the test instrument, and the telescopic guide wire has a certain elasticity and can automatically retract.

[0012] Specifically, the connecting groove provided on the vane probe is used to connect with the vane head, and the vane head is pressed into the soil for testing.

[0013] Specifically, the connecting block is used to connect with the force end of the test instrument.

[0014] Specifically, the strain sensing body is used to detect the stress condition of the vane head and transmit the stress condition to the data receiving device in the form of an electric signal.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model discloses a telescopic probe for in-situ vane shear test on the sea, which comprises a vane probe, an inner guide rod, an outer guide rod, a telescopic guide wire, a connecting block and a strain sensing body.

[0017] The utility model has the advantages of simple overall structure, applicability to the vane shear test under the condition that the operation platform has a certain fluctuation and swing, and no need to invest high cost. DRAWINGS

[0018] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the utility model, which shows a telescopic probe for in-situ vane shear test on the sea; and Fig. 1 shows a vane probe, a connecting groove, a strain sensing body, an outer guide rod, an inner guide rod, lubricating oil, a telescopic guide wire and a connecting block. DETAILED DESCRIPTION

[0019] The technical solutions of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only some of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and it is not indicated or implied that the device or element must have a particular orientation, a particular orientation and operation, therefore it cannot be understood as a limitation on the utility model.

[0021] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, the term "installation", "connection", "connection" should be broad sense, for example, it can be fixed connection, can be detachable connection, or integrally connected, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through the intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances. In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0022] Example 1

[0023] As shown in the figure, the connecting groove 11 provided on the vane probe 1 is used for connecting with the vane head, the vane head is used to press into the soil for testing in the existing shear test, the strain sensing body 2 is arranged in the vane probe 1, the strain sensing body 2 is used to detect the stress condition of the vane head in the existing shear test, and the stress condition is transmitted to the data receiving equipment in the form of electrical signal, it needs to be explained that the vane head and the strain sensing body 2 are both existing devices used in the existing shear test, so the two components are not described in detail,

[0024] The vane probe 1 is connected with one end of the outer guide rod 3, the central hole provided on the outer guide rod 3 is connected with the inner guide rod 4, the central hole of the outer guide rod 3 is provided as a hexagonal hole structure, and the outer part of the inner guide rod 4 is provided as a hexagonal structure, and the lubricating oil 5 is filled between the connection of the outer guide rod 3 and the inner guide rod 4, to reduce the longitudinal sliding friction between the inner guide rod 4 and the outer guide rod 3, as shown in the figure, one end of the inner guide rod 4 penetrates from the end of the outer guide rod 3 and extends out to be connected with the connecting block 7, the connecting block 7 is used to be connected with the force end of the testing instrument, and the other end of the inner guide rod 4 is provided with a protrusion arranged with the inner wall of the outer guide rod 3, the protrusion is arranged to limit the longitudinal sliding between the inner guide rod 4 and the outer guide rod 3,

[0025] The inner guide rod 4 is arranged as a hollow structure, and the telescopic wire 6 is arranged inside the inner guide rod 4, one end of the telescopic wire 6 is connected with the strain sensor 2 in the cross plate probe 1, the other end is connected with the testing instrument, and the telescopic wire 6 has a certain elasticity and can automatically contract.

[0026] Embodiment 2

[0027] In use, the connecting block 7 is installed on the force end of the testing instrument, the cross plate probe 1 is installed on the cross plate head, and then the cross plate head is pressed into the soil at the bottom of the hole to perform the test, wherein the testing instrument is installed on the floating platform for drilling, the telescopic force transmission guide rod composed of the inner guide rod 4 and the outer guide rod 3 is arranged between the testing instrument and the cross plate probe 1,

[0028] When the floating platform swings, the testing instrument moves up and down, the force end drives the inner guide rod connected with the force end to move up and down in the outer guide rod, so that the cross plate head can overcome the situation that the floating platform for drilling swings to a certain extent, and the test can be performed.

[0029] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. The components mentioned in the utility model are common technologies in the prior art, which should be understood by the skilled in the art. The utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements fall within the scope of the utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A retractable probe for in-situ shear testing of offshore cross-plates, characterized in that It includes an outer guide rod, an inner guide rod, a telescopic wire and a cross plate probe, the cross plate probe is connected with one end of the outer guide rod, a strain sensing body is arranged in the cross plate probe, the inner guide rod is connected in the central hole arranged on the outer guide rod, the inner guide rod is arranged as a hollow structure, the telescopic wire is arranged in the inner guide rod, and one end of the telescopic wire is connected with the strain sensing body.

2. The offshore vane in-situ shear test retractable probe of claim 1, wherein One end of the inner guide rod penetrates through the end of the outer guide rod and is connected with the connecting block.

3. The offshore vane in-situ shear test retractable probe of claim 1, wherein The central hole of the outer guide rod is arranged as a hexagonal hole structure, and the outer part of the inner guide rod is arranged as a hexagonal structure.

4. The offshore vane in-situ shear test retractable probe of claim 3, wherein Lubricating oil is filled between the connection of the outer guide rod and the inner guide rod to reduce the friction of longitudinal sliding between the inner guide rod and the outer guide rod.

5. The offshore vane in-situ shear test retractable probe of claim 1, wherein The telescopic wire has a certain elasticity.

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