A self-drilling seabed static cone penetration device and construction method

Abstract

The application discloses a self-drilling seabed static sounding device, which comprises a penetrating device, a self-drilling static sounding device penetrating through the inside of the penetrating device, wherein the self-drilling static sounding device comprises a probe, a first side expander, an electric cylinder, a second side expander, a probe rod and a umbilical cable, the probe is installed below the first side expander, the first side expander is installed below the electric cylinder, the electric cylinder is installed below the second side expander, the second side expander is installed below the probe rod, the probe rod is installed below the tensile steel wire of the umbilical cable, and the inside of the umbilical cable passes through a transfusion tube and is connected to the second side expander and the first side expander respectively. The probe is penetrated into the rock-soil by injecting oil into the second side expander and simultaneously pumping out the oil in the first side expander, so that the static sounding device can be automatically penetrated into the seabed, and then the seabed static sounding device can be automatically deepened into the seabed, thereby facilitating the static sounding test on the seabed. The device has simple structure and is easy to operate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of static sounding devices, in particular to a self-drilling seabed static sounding device and a construction method. BACKGROUND

[0002] The offshore static sounding system is a marine instrument used in the field of earth science. The seabed static sounding device can be inserted into the soil inside the seabed during use and test the soil of the seabed through the detector. The static sounding device is inserted into the seabed bottom during use of the equipment.

[0003] For example, the published patent CN102518105B discloses a seabed static sounding penetration device, which comprises a base frame for supporting the whole device, a probe rod library, a walking mechanism, a mechanical hand, an anchor, a bottom plate, a rotating intermittent mechanism and a hydraulic power source. The bottom plate is fixedly connected to the bottom of the base frame. The probe rod library comprises a library frame, a probe rod, a probe rod frame and a rotating shaft. The library frame is fixed to the bottom plate. The rotating shaft and the probe rod frame are located in the library frame. The probe rod is placed on the probe rod frame. The rotating shaft is fixed to the center of the probe rod frame and can drive the probe rod frame to rotate. The top end of the rotating shaft is fixed to the top of the library frame through a rolling bearing. The bottom end of the rotating shaft is fixed to the bottom plate through a rolling bearing. The seabed static sounding penetration device can realize a sounding process with a maximum cone penetration depth of 15m, is suitable for seabed static sounding, and can also be used on land.

[0004] For example, the invention patent CN113106956B discloses a light seabed static sounding operation equipment, which comprises an operation platform arranged on an operation sea surface, a gantry fixing assembly, a lifting assembly, a compensation assembly, a pressurizing assembly, a suction anchor assembly and a probe rod. The gantry fixing assembly is fixedly arranged on the operation platform. The lifting assembly is fixedly arranged on the gantry fixing assembly and can move up and down. The compensation assembly is fixedly arranged on the operation platform. The compensation assembly is used for compensating the displacement of the lifting assembly and the tension required by the probe rod during movement. The pressurizing assembly is connected and fixed with the lifting assembly through the probe rod. The pressurizing assembly is used for driving the probe rod to press down or pull out. The suction anchor assembly is connected and fixed with the pressurizing assembly. The suction anchor assembly is used for adsorbing and penetrating into the seabed or pressurizing and pulling out of the seabed. The top end of the probe rod is provided with a static sounding probe head. The present application uses the good pull-out performance of the light suction anchor to replace the heavy seabed CPT base, so as to realize the purpose of realizing the light structure to meet the driving penetration of the static sounding operation.

[0005] However, the above-mentioned traditional seabed static sounding device is lowered to the seabed by a steel wire rope. The probe rods are connected to the static sounding device on the seabed one by one from the deck. The penetration device penetrates the probe rods into the rock-soil of the seabed. The whole process is complex, labor-intensive, and greatly affected by environmental factors. When the wind and wave are large, the work cannot be carried out. The whole equipment is heavy and the cost is high. SUMMARY

[0006] The self-drilling seabed static sounding device and the construction method aim to solve the problems of the static sounding device in the background art, which is greatly affected by environmental factors and cannot work when the wind and wave are large, and the whole device is heavy and high in cost.

[0007] To achieve the above object, the self-drilling seabed static sounding device comprises a self-drilling static sounding device, wherein the self-drilling static sounding device comprises a probe, a first side inflation device, an electric cylinder, a second side inflation device, a probe rod and a umbilical cable, the probe is installed below the first side inflation device, the first side inflation device is installed below the electric cylinder, the electric cylinder is installed below the second side inflation device, the second side inflation device is installed below the probe rod, the probe rod is installed below the tensile steel wire of the umbilical cable, and the inside of the umbilical cable is connected to the second side inflation device and the first side inflation device through a liquid delivery pipe.

[0008] The electric cylinder comprises an electric cylinder piston, an electric cylinder barrel, an electric cylinder screw rod and an electric cylinder motor, the electric cylinder screw rod is connected to the electric cylinder motor in the same axis, the electric cylinder screw rod is threadedly connected to the electric cylinder piston, and the electric cylinder motor drives the electric cylinder screw rod to rotate forward or reversely, thereby pushing the electric cylinder piston to extend or retract.

[0009] The electric cylinder piston, the electric cylinder barrel, the electric cylinder screw rod and the electric cylinder motor are all hollow cylindrical structures, and the electric cylinder piston, the electric cylinder screw rod and the electric cylinder motor are installed in the electric cylinder barrel.

[0010] Preferably, the surface of the self-drilling static sounding device is penetrated by a penetration device.

[0011] Preferably, one end of the probe is connected to a signal line, the signal line is connected to the signal line of the umbilical cable through the bottom of the first side inflation device, the electric cylinder, the second side inflation device and the probe rod, the tail end of the probe rod is connected to the tensile steel wire inside the umbilical cable, and the signal lines on the electric cylinder and the probe are connected to the cable inside the umbilical cable.

[0012] Preferably, the first side inflation device comprises a side inflation device main body, a side inflation film and a liquid inlet hole, the side inflation film is wrapped outside the side inflation device main body, the liquid inlet hole is in communication with the inner cavity of the side inflation film, and the liquid inlet hole is in communication with the liquid delivery pipe of the umbilical cable.

[0013] Preferably, the first side inflation device and the second side inflation device are the same in structure.

[0014] Preferably, the self-drilling seabed static sounding device construction method comprises the following steps.

[0015] S1: Place the self-drilling static cone penetration test device and the penetration device on the seabed. The penetration device clamps the self-drilling static cone penetration test device. Insert the second side expansion device and its lower part into the rock and soil. Then the penetration device releases the self-drilling static cone penetration test device.

[0016] S2: Hydraulic oil is injected into the second side expander to make it expand, and then a signal is given to the electric cylinder to extend, so that the electric cylinder piston extends at a stable penetration speed and the probe is inserted into the rock and soil for static penetration test.

[0017] S3: When the electric cylinder piston extends to its maximum stroke, hydraulic oil is drawn out from the second side expander to make it contract, and hydraulic oil is filled into the first side expander to make it expand. The expansion of the first side expander compresses the surrounding rock and soil, creating a huge frictional force. Then, a contraction signal is given to the electric cylinder to make the electric cylinder piston retract back into the electric cylinder body. The electric cylinder body drives the second side expander, probe rod and umbilical cable to move downward together.

[0018] S4: After the electric cylinder piston is fully retracted into the electric cylinder body, hydraulic oil is extracted from the first side expander, causing the first side expander to contract. Hydraulic oil is then injected into the second side expander, causing the second side expander to expand. The expansion of the second side expander creates a huge frictional force by squeezing the surrounding rock and soil. Then, a signal is given to the electric cylinder to extend, causing the electric cylinder piston to extend at a stable penetration speed, inserting the probe into the rock and soil to continue the static penetration test. This cycle is repeated. After the static penetration test is completed, hydraulic oil is extracted from the first and second side expanders, causing them to contract. They are then retrieved onto the deck using an umbilical cable.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The self-drilling static cone penetration test (DCPT) device and construction method involve inserting the second side expander and its lower portion into the rock and soil using a penetration device. Then, the penetration device releases the self-drilling DCPT device, and hydraulic oil is injected into the second side expander to expand it. A signal is then given to the electric cylinder to extend the piston at a stable penetration speed, allowing the probe to penetrate the rock and soil for static cone penetration testing. Afterward, when the electric cylinder piston reaches its maximum stroke, hydraulic oil is withdrawn from the second side expander to contract it, and hydraulic oil is injected into the first side expander to expand it. The expansion of the first side expander creates pressure and friction with the surrounding rock and soil, generating significant friction. A signal is then given to the electric cylinder to retract the piston back into the cylinder body, which in turn drives the second side expander... The expander, probe, and umbilical cable move downwards together. After the electric cylinder piston fully retracts into the cylinder body, hydraulic oil is extracted from the first expander, causing it to contract. Hydraulic oil is then injected into the second expander, causing it to expand. The expansion of the second expander creates significant friction with the surrounding rock and soil, generating a powerful frictional force. A signal is then sent to the electric cylinder to extend the piston at a stable penetration speed, inserting the probe into the rock and soil to continue the static cone penetration test. This cycle is repeated. After the static cone penetration test is completed, hydraulic oil is extracted from both the first and second expanders, causing them to contract. The umbilical cable is then used to retrieve them onto the deck. This equipment has a simple structure, can automatically drill into the seabed, and performs static cone penetration tests. This solution is low-cost, convenient to use, and effectively reduces labor costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the self-drilling seabed static cone penetration test device of the present invention before penetrating the rock and soil.

[0021] Figure 2 This is a schematic diagram of the structure of the second side expander and its lower part of the self-drilling static cone penetration test device of the present invention after being inserted into the soil and rock.

[0022] Figure 3 This is a schematic diagram of the structure of the self-drilling static cone penetration test device of the present invention after it is separated from the penetration device.

[0023] Figure 4 This is a schematic diagram of the main structure of the first side expander of the present invention;

[0024] Figure 5 This is a schematic diagram of the main cross-sectional structure of the first side expander of the present invention;

[0025] Figure 6 This is a schematic diagram of the main structure of the electric cylinder of the present invention;

[0026] Figure 7 This is a schematic diagram of the main cross-sectional structure of the electric cylinder of the present invention.

[0027] In the diagram: 1. Penetration device; 2. Probe; 3. First side expander; 301. Side expander body; 302. Side expansion membrane; 303. Liquid inlet; 4. Electric cylinder; 401. Electric cylinder piston; 402. Electric cylinder barrel; 403. Electric cylinder lead screw; 404. Electric cylinder motor; 5. Second side expander; 6. Probe rod; 7. Umbilical cable. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-7 This invention provides a technical solution: a self-drilling static cone penetration test device, comprising: a self-drilling static cone penetration test device, the self-drilling static cone penetration test device including a probe 2, a first side expander 3, an electric cylinder 4, a second side expander 5, a probe rod 6 and an umbilical cable 7, the probe 2 being installed below the first side expander 3, the first side expander 3 being installed below the electric cylinder 4, the electric cylinder 4 being installed below the second side expander 5, the second side expander 5 being installed below the probe rod 6, the probe rod 6 being installed below the tensile steel wire of the umbilical cable 7, and the inside of the umbilical cable 7 passing through an infusion tube and connected to the second side expander 5 and the first side expander 3 respectively;

[0030] The electric cylinder 4 includes an electric cylinder piston 401, an electric cylinder barrel 402, an electric cylinder lead screw 403, and an electric cylinder motor 404. The electric cylinder lead screw 403 is connected to the electric cylinder motor 404 on the phase shaft, and the electric cylinder lead screw 403 is threadedly connected to the electric cylinder piston 401. The electric cylinder motor 404 drives the electric cylinder lead screw 403 to rotate forward or in reverse, thereby pushing the electric cylinder piston 401 to extend or retract.

[0031] The electric cylinder piston 401, electric cylinder barrel 402, electric cylinder lead screw 403 and electric cylinder motor 404 are all hollow cylindrical structures, and the electric cylinder piston 401, electric cylinder lead screw 403 and electric cylinder motor 404 are installed inside the electric cylinder barrel 402.

[0032] The surface of the self-drilling static cone penetrometer is permeated with a penetration device 1.

[0033] One end of probe 2 is connected to a signal line. The signal line passes through the bottom of the first side expander 3, the electric cylinder 4, the second side expander 5, and the probe rod 6 and is connected to the signal line of the umbilical cable 7. The tail end of the probe rod 6 is connected to the tensile steel wire inside the umbilical cable 7. The signal lines on the electric cylinder 4 and probe 2 are connected to the cable inside the umbilical cable 7. The data tested by probe 2 can be transmitted to the acquisition instrument on the deck through the signal line.

[0034] The first side expander 3 includes a side expander body 301, a side expander membrane 302, and a liquid inlet 303. The side expander membrane 302 is wrapped around the outside of the side expander body 301. The liquid inlet 303 is connected to the inner cavity of the side expander membrane 302 and is connected to the infusion tube of the umbilical cable 7. When hydraulic medium is input into the inner cavity of the side expander membrane 302, the side expander membrane 302 expands and is squeezed together with the surrounding rock and soil. When the hydraulic medium is extracted from the inner cavity of the side expander membrane 302, the side expander membrane 302 contracts under its own elasticity and separates from the surrounding rock and soil.

[0035] The first side expander 3 and the second side expander 5 have the same structure. By injecting oil, the first side expander 3 and the second side expander 5 can be opened or collapsed.

[0036] A method for constructing a self-drilling subsea static cone penetration test device includes the following steps:

[0037] The self-drilling static cone penetration test (DCPT) device and the penetration device 1 are placed on the seabed. The penetration device 1 clamps the DCPT device, and the second side expander 5 and its lower part of the DCPT device are inserted into the rock and soil. Then, the penetration device 1 releases the DCPT device. Hydraulic oil is injected into the second side expander 5 to expand it. Then, an extension signal is input to the electric cylinder 4, causing the electric cylinder piston 401 to extend at a stable penetration speed, inserting the probe 2 into the rock and soil for static cone penetration testing. When the electric cylinder piston 401 extends to its maximum stroke, hydraulic oil is withdrawn from the second side expander 5 to contract it, and hydraulic oil is injected into the first side expander 3 to expand it. The first side expander 3 expands and connects with the surrounding rock and soil. The soil is compressed, generating enormous friction. A contraction signal is then input to the electric cylinder 4, causing the piston 401 to retract into the cylinder barrel 402. The cylinder barrel 402 drives the second side expander 5, probe 6, and umbilical cable 7 downwards. Once the piston 401 is fully retracted into the cylinder barrel 402, hydraulic oil is extracted from the first side expander 3, causing it to contract. Hydraulic oil is then injected into the second side expander 5, causing it to expand. The expansion of the second side expander 5 compresses the surrounding soil and rock, generating enormous friction. A signal is then sent to the electric cylinder 4 to extend, causing the piston 401 to extend at a stable penetration speed, inserting the probe 2 into the soil and rock to continue the static penetration test. This cycle repeats until the static penetration test is completed. Afterward, hydraulic oil is extracted from the first side expander 3 and the second side expander 5, causing them to contract, and the umbilical cable 7 is used to retrieve them onto the deck.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-drilling static cone penetration test device for the seabed, comprising: The self-drilling static cone penetration test device is characterized in that: the self-drilling static cone penetration test device includes a probe (2), a first side expander (3), an electric cylinder (4), a second side expander (5), a probe rod (6), and an umbilical cable (7). The probe (2) is installed below the first side expander (3), the first side expander (3) is installed below the electric cylinder (4), the electric cylinder (4) is installed below the second side expander (5), the second side expander (5) is installed below the probe rod (6), the probe rod (6) is installed below the tensile steel wire of the umbilical cable (7), and the inside of the umbilical cable (7) passes through an infusion tube and is connected to the second side expander (5) and the first side expander (3) respectively. The electric cylinder (4) includes an electric cylinder piston (401), an electric cylinder barrel (402), an electric cylinder lead screw (403), and an electric cylinder motor (404). The electric cylinder lead screw (403) is connected to the electric cylinder motor (404) on the phase shaft. The electric cylinder lead screw (403) is threadedly connected to the electric cylinder piston (401). The electric cylinder motor (404) drives the electric cylinder lead screw (403) to rotate forward or in reverse, thereby pushing the electric cylinder piston (401) to extend or retract. The electric cylinder piston (401), electric cylinder barrel (402), electric cylinder lead screw (403) and electric cylinder motor (404) are all hollow cylindrical structures, and the electric cylinder piston (401), electric cylinder lead screw (403) and electric cylinder motor (404) are installed inside the electric cylinder barrel (402); The surface of the self-drilling static cone penetrometer is perforated by a penetrating device (1). The first side expander (3) includes a side expander body (301), a side expander membrane (302) and an inlet hole (303). The side expander membrane (302) is wrapped around the outside of the side expander body (301). The inlet hole (303) is connected to the inner cavity of the side expander membrane (302) and the inlet hole (303) is connected to the infusion tube of the umbilical cable (7). The first side expander (3) and the second side expander (5) have the same structure.

2. The self-drilling static cone penetration test device according to claim 1, characterized in that, One end of the probe (2) is connected to a signal line. The signal line passes through the bottom of the first side expander (3), the electric cylinder (4), the second side expander (5) and the probe rod (6) and is connected to the signal line of the umbilical cable (7). The tail end of the probe rod (6) is connected to the tensile steel wire inside the umbilical cable (7). The signal lines on the electric cylinder (4) and the probe (2) are connected to the cable inside the umbilical cable (7).

3. A method for constructing a self-drilling subsea static cone penetration test device, the method being used to execute the self-drilling subsea static cone penetration test device as described in claim 2, characterized in that... The method includes the following steps: S1: Place the self-drilling static cone penetration device and the penetration device (1) on the seabed. The penetration device (1) clamps the self-drilling static cone penetration device. Insert the second side expansion device (5) and its lower part of the self-drilling static cone penetration device into the rock and soil. Then the penetration device (1) releases the self-drilling static cone penetration device. S2: Fill the second side expander (5) with hydraulic oil to expand it, and then give the electric cylinder (4) a signal to extend so that the electric cylinder piston (401) extends at a stable penetration speed and inserts the probe (2) into the rock and soil for static penetration test. S3: When the electric cylinder piston (401) extends to its maximum stroke, hydraulic oil is drawn out from the second side expander (5) to make it contract, and hydraulic oil is filled into the first side expander (3) to make it expand. The first side expander (3) expands and squeezes the surrounding rock and soil to form a huge friction force. Then, a contraction signal is given to the electric cylinder (4) to make the electric cylinder piston (401) retract back into the electric cylinder body. The electric cylinder body drives the second side expander (5), probe (6) and umbilical cable (7) to move downward together. S4: When the electric cylinder piston (401) is fully retracted into the electric cylinder body, hydraulic oil is extracted from the first side expander (3) to make the first side expander (3) contract, and hydraulic oil is injected into the second side expander (5) to make the second side expander (5) expand. The second side expander (5) expands and squeezes the surrounding rock and soil to form a huge frictional force. Then, an extension signal is input to the electric cylinder (4) to make the electric cylinder piston (401) extend at a stable penetration speed and insert the probe (2) into the rock and soil to continue the static penetration test. This cycle is repeated. After the static penetration test is completed, hydraulic oil is extracted from the first side expander (3) and the second side expander (5) to make them contract, and they are retrieved onto the deck with the umbilical cable (7).

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