Device and method for quickly measuring pore pressure in barrel foundation soil during sinking

Abstract

The present invention discloses a device for quickly measuring the pore pressure during the sinking process of a cylindrical foundation in soil, and relates to the technical field of pore pressure test, including a cylinder, a plurality of outer clamps are equidistantly fixedly connected to the outer surface of the cylinder, and a plurality of inner clamps are equidistantly fixedly connected to the inner surface of the cylinder; a first measuring component, and the first measuring component is used for measuring the pore pressure outside the foundation. In the present invention, the foundation is then pulled out, and the foundation is lifted by injecting water into the water outlet or using a crane until the soil is pulled out, and the pore pressure measurement is completed and the device is recovered after the foundation is lifted, the switches of the first ball valve and the second ball valve are opened to allow the water in the pipeline to flow out, release the pressure in the pipeline, unscrew the first pore pressure sensor and the second pore pressure sensor, realize the recovery of the sensor, remove the outer clamp and the inner clamp, and recycle the first measuring component and the second measuring component, so as to achieve the purpose of simple operation and recyclable equipment.

Description

Technical Field

[0001] The invention relates to the technical field of pore pressure testing, in particular to a device and a method for quickly measuring pore pressure during the sinking process in barrel foundation soil. Background Art

[0002] In marine engineering, the soil will be disturbed during the installation and operation of the foundation. This requires rapid and accurate measurement of the changes in pore water pressure in the soil to evaluate the foundation settlement and soil mechanical properties.

[0003] In the prior art, the traditional pore pressure measurement method has some defects. The installation steps of the device are cumbersome, including the layout, fixation and sealing of the sensor line. Due to the particularity of the soil environment, the measurement process is affected by environmental factors, resulting in inaccurate and unreliable measurement results. In addition, once the measurement of the traditional measuring device is completed, the sensors and equipment are often difficult to recycle and reuse, and are usually discarded, which increases costs and imposes a burden on the environment.

[0004] Therefore, we proposed a device and a method for quickly measuring the pore pressure during the sinking process of the cylindrical foundation soil, in order to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a device and a measuring method for quickly measuring the pore pressure during the penetration process in a cylindrical foundation soil, so as to solve some defects of the traditional pore pressure measurement method proposed in the above-mentioned background technology. The installation steps of the device are cumbersome, including the layout, fixation and sealing of the sensor line, and due to the particularity of the soil environment, the measurement process is affected by environmental factors, resulting in inaccurate and unreliable measurement results. In addition, once the measurement of the traditional measuring device is completed, the sensors and equipment are often difficult to recycle and reuse, and are usually discarded, which increases costs and imposes a burden on the environment.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for quickly measuring the pore pressure during the sinking process in the soil of a cylindrical foundation, comprising a cylinder, a plurality of outer clamps are equidistantly fixedly connected to the outer surface of the cylinder, and a plurality of inner clamps are equidistantly fixedly connected to the inner surface of the cylinder; a first measuring component, the first measuring component is used for measuring the pore pressure outside the foundation, the first measuring component is fixedly connected to the cylinder, the first measuring component comprises an outer guide tube and a high-pressure air pump, the outer guide tube is fixedly connected to the outer surface of the cylinder, and the outer guide tube fits the outer wall of the cylinder; a second measuring component, the second measuring component is used for measuring the pore pressure inside the foundation, the second measuring component is fixedly connected to the cylinder, the second measuring component comprises an inner guide tube and a syringe, the inner guide tube is fixedly connected to the inner surface of the cylinder, the upper end face of the inner guide tube passes through the cylinder and extends to the upper side, and the lower end face of the inner guide tube is located at the bottom of the cylinder.

[0007] Preferably, a first microporous water-permeable sheet is arranged on the lower end face of the outer guide tube, a first conversion joint is fixedly connected to the upper end face of the outer guide tube, a first transmission tube is fixedly connected to the upper end face of the first conversion joint, and a first three-way joint is fixedly connected to the upper end face of the first transmission tube.

[0008] Preferably, a first right-angle bend joint is fixedly connected to the outer surface of the first three-way joint, a first reducer is fixedly connected to the lower end surface of the first right-angle bend joint, the first reducer is connected to the first three-way joint, a first pore pressure sensor is fixedly connected to the lower end surface of the first reducer, and the first pore pressure sensor is matched with the cylinder.

[0009] Preferably, a first connecting pipe is fixedly connected to the upper end surface of the first three-way joint, a first ball valve is matchedly arranged inside the first connecting pipe, and a first quick-connect joint is fixedly connected to the upper end surface of the first connecting pipe.

[0010] Preferably, an air pipe is fixedly connected to the output end of the high-pressure air pump, the air pipe is matched with the first quick-connect connector, and the air pipe is connected with the first connecting pipe.

[0011] Preferably, the lower end face of the inner guide tube is fixedly connected with a second microporous water-permeable sheet, the upper end face of the inner guide tube is fixedly connected with a second conversion joint, the upper end face of the second conversion joint is fixedly connected with a second transmission tube, and the upper end face of the second transmission tube is fixedly connected with a second three-way joint.

[0012] Preferably, a second right-angle bend joint is fixedly connected to the outer surface of the second three-way joint, a second reducer is fixedly connected to the lower end surface of the second right-angle bend joint, the second reducer is connected to the second three-way joint, a second pore pressure sensor is fixedly connected to the lower end surface of the second reducer, and the second pore pressure sensor is matched with the cylinder.

[0013] Preferably, a second connecting pipe is fixedly connected to the upper end surface of the second three-way connector, a second ball valve is matched inside the second connecting pipe, a second quick-connector is fixedly connected to the upper end surface of the second connecting pipe, a hose is fixedly connected to the output end of the syringe, and the hose and the second quick-connector are matched.

[0014] Preferably, a water outlet is fixedly connected to the top of the cylinder, and the water outlet is communicated with the cylinder. A support rod is fixedly connected to the top of the cylinder, and a bracket is fixedly connected to the upper end surface of the support rod, and the bracket is used to provide installation support for the first measuring component and the second measuring component.

[0015] The measuring method of the device for quickly measuring the pore pressure during the sinking process in the soil of a cylindrical foundation comprises the following steps:

[0016] S1. When measuring the pore pressure of underwater soil, the support rod and the bracket are used together to form a support foundation to provide installation support for the pipelines of the first measuring component and the second measuring component. The outer guide tube is fixed at the outer wall position of the inner tube by using the outer clamp, and the inner guide tube is fixed at the inner wall position of the inner tube by using the inner clamp. The first microporous water-permeable sheet and the second microporous water-permeable sheet are used together to provide protection for the bottom opening positions of the outer guide tube and the inner guide tube, respectively, so as to achieve filtering of soil particles.

[0017] S2. When the measurement starts, water is injected into the pipeline, and then the high-pressure air pump is operated. After the high-pressure air pump is operated, the air tightness of the pipeline can be tested through the connection of the air pipe, the first connecting pipe, the first three-way joint, the first transmission pipe and the outer guide pipe. At the same time, the high-speed airflow generated by the operation of the high-pressure air pump can play a role in clearing the pipeline;

[0018] S3, then use the syringe to pump water to saturate the pipeline. When the pipeline is full of water, close the first ball valve and the second ball valve. At this time, the first pore pressure sensor and the second pore pressure sensor are in a saturated state, and the pipelines of the first measuring assembly and the second measuring assembly are full of water. As the foundation sinks, the inner cylinder is driven to penetrate downward by pumping water outside the cylinder, and the outer guide pipe is gradually buried in the soil along with the foundation.

[0019] S4. When the bottom end of the outer guide tube touches the soil layer, the disturbance of the soil by the foundation sinking causes the pore water pressure in the soil to change. The water pressure change can be transmitted to the first pore pressure sensor and the second pore pressure sensor in real time through the pipeline. Then the foundation is pulled out by injecting water into the water outlet or using a crane to lift the foundation until the soil is pulled out. After the pore pressure measurement is completed and the foundation is lifted, the device is recovered, the switches of the first ball valve and the second ball valve are opened to allow the water in the pipeline to flow out, the pressure in the pipeline is released, the first pore pressure sensor and the second pore pressure sensor are unscrewed to recover the sensors, the outer clamp and the inner clamp are removed, and the first measuring component and the second measuring component are recovered.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. During use, when measuring the pore pressure of underwater soil, when the bottom end of the outer guide tube touches the soil layer, the disturbance of the soil by the foundation sinking causes the pore water pressure in the soil to change. The water pressure change can be transmitted to the first pore pressure sensor and the second pore pressure sensor in real time through the pipeline. Then the foundation is pulled out, and the foundation is lifted by injecting water into the water outlet or using a crane until the soil is pulled out. After the pore pressure measurement is completed and the foundation is lifted, the device is recovered, the switches of the first ball valve and the second ball valve are opened to allow the water in the pipeline to flow out, the pressure in the pipeline is released, the first pore pressure sensor and the second pore pressure sensor are unscrewed to realize the recovery of the sensors, the outer clamp and the inner clamp are removed, and the first measuring component and the second measuring component are recovered, so as to achieve the purpose of simple operation and recyclable equipment.

[0022] 2. When in use, the first microporous water-permeable sheet and the second microporous water-permeable sheet are used together to provide protection for the bottom openings of the outer guide pipe and the inner guide pipe, respectively, so as to filter soil particles and effectively avoid the problem of pipeline blockage;

[0023] 3. When in use, the inner guide tube and the outer guide tube are made of stainless steel, their lengths are adjustable, and they are rigidly connected to the inner tube, which enhances the coordination between the inner guide tube and the outer guide tube and the foundation, so that the pore pressure measurement position in the soil can be accurately located, and can be used for the rapid installation and recovery of pore pressure measurement equipment in different soil model tests. The inner guide tube and the outer guide tube are made of rigid materials, which can easily pass through the soil layer without drilling and pre-embedding, and the disturbance to the land is small, which effectively improves the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of a device for rapidly measuring pore pressure in a cylindrical foundation soil during the sinking process of the present invention;

[0025] Figure 2 A bottom view of the device for rapidly measuring pore pressure in a barrel foundation soil during the sinking process of the present invention;

[0026] Figure 3 It is a cross-sectional view of the inner cylinder structure of the device for quickly measuring the pore pressure in the process of sinking into the soil of a cylindrical foundation according to the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the first measuring component of the device for quickly measuring the pore pressure in the barrel foundation soil during the sinking process of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the first measuring component of the device for quickly measuring the pore pressure in the barrel foundation soil during the sinking process of the present invention;

[0029] Figure 6 The present invention is a schematic diagram of the structure of the second measuring component of the device for rapidly measuring the pore pressure in the soil of a cylindrical foundation during the sinking process.

[0030] In the figure:

[0031] 1. Cylinder; 3. External clamp; 4. Internal clamp; 5. First measuring assembly; 501. External guide tube; 502. First microporous water-permeable sheet; 503. First conversion joint; 504. First transmission pipe; 505. First three-way joint; 506. First connecting pipe; 507. First ball valve; 508. First right-angle elbow joint; 509. First reducer conversion joint; 510. First quick-connect joint; 511. Air pipe; 512. High-pressure air pump; 513. First pore pressure sensor; 6. Second measuring component; 601. Inner guide tube; 602. Second microporous water-permeable sheet; 603. Second conversion joint; 604. Second transmission pipe; 605. Second three-way joint; 606. Second right-angle elbow joint; 607. Second reducer conversion joint; 608. Second pore pressure sensor; 609. Second connecting pipe; 610. Second ball valve; 611. Second quick-connect joint; 612. Hose; 613. Syringe; 7. Water outlet; 9. Support rod; 10. Bracket. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Reference Figure 1-Figure 6 As shown: a device for quickly measuring the pore pressure during the sinking process in the soil of a cylindrical foundation, comprising a cylinder 1, a plurality of outer clamps 3 are equidistantly fixedly connected to the outer surface of the cylinder 1, and a plurality of inner clamps 4 are equidistantly fixedly connected to the inner surface of the cylinder 1; a first measuring component 5, the first measuring component 5 is used for measuring the pore pressure outside the foundation, the first measuring component 5 is fixedly connected to the cylinder 1, the first measuring component 5 comprises an outer guide tube 501 and a high-pressure air pump 512, the outer guide tube 501 is fixedly connected to the outer surface of the cylinder 1, and the outer guide tube 501 fits the outer wall of the cylinder 1; a second measuring component 6, the second measuring component 6 is used for measuring the pore pressure inside the foundation, the second measuring component 6 is fixedly connected to the cylinder 1, the second measuring component 6 comprises an inner guide tube 601 and a syringe 613, the inner guide tube 601 is fixedly connected to the inner surface of the cylinder 1, the upper end surface of the inner guide tube 601 passes through the cylinder 1 and extends to the upper side, and the lower end surface of the inner guide tube 601 is located at the bottom of the cylinder 1.

[0034] like Figure 3 and Figure 4As shown, a first microporous water-permeable sheet 502 is arranged on the lower end face of the outer guide tube 501, a first conversion joint 503 is fixedly connected to the upper end face of the outer guide tube 501, a first transmission tube 504 is fixedly connected to the upper end face of the first conversion joint 503, and a first three-way joint 505 is fixedly connected to the upper end face of the first transmission tube 504. By using the first microporous water-permeable sheet 502 and the second microporous water-permeable sheet 602 in coordination, protection can be provided for the bottom opening positions of the outer guide tube 501 and the inner guide tube 601 respectively, soil particles can be filtered, and the problem of pipeline blockage can be effectively avoided.

[0035] like Figure 4 and Figure 5 As shown, the outer surface of the first three-way joint 505 is fixedly connected to the first right-angle bend joint 508, the lower end surface of the first right-angle bend joint 508 is fixedly connected to the first reducer 509, the first reducer 509 is connected to the first three-way joint 505, the lower end surface of the first reducer 509 is fixedly connected to the first pore pressure sensor 513, the first pore pressure sensor 513 is matched with the cylinder 1, the inner guide tube 501 and the outer guide tube 601 are both made of stainless steel, the length of which is adjustable, and are rigidly connected to the cylinder 1, which enhances the coordination between the inner guide tube 501 and the outer guide tube 601 and the foundation, so that the pore pressure measurement position in the soil can be accurately located.

[0036] like Figure 4 and Figure 5 As shown, the upper end surface of the first three-way joint 505 is fixedly connected with the first connecting pipe 506, and the first ball valve 507 is matched inside the first connecting pipe 506. The upper end surface of the first connecting pipe 506 is fixedly connected with the first quick-connect joint 510. By using the first quick-connect joint 510, the air pipe 511 is inserted into the first quick-connect joint 510, so that the high-pressure air pump 512 can be connected with the first connecting pipe 506, which is convenient and quick to connect the high-pressure air pump 512.

[0037] like Figure 4 and Figure 5 As shown, the output end of the high-pressure air pump 512 is fixedly connected with an air pipe 511, the air pipe 511 is matched with the first quick-connect connector 510, and the air pipe 511 is connected with the first connecting pipe 506. When the measurement starts, water is injected into the pipeline, and then the high-pressure air pump 512 is operated. After the high-pressure air pump 512 is operated, the air tightness of the pipeline can be tested through the connection of the air pipe 511, the first connecting pipe 506, the first three-way connector 505, the first transmission pipe 504 and the outer guide pipe 501. At the same time, the high-speed airflow generated by the operation of the high-pressure air pump 512 can play a role in unblocking the pipeline.

[0038] like Figure 3 and Figure 6As shown, the lower end face of the inner guide tube 601 is fixedly connected to the second microporous water-permeable sheet 602, the upper end face of the inner guide tube 601 is fixedly connected to the second conversion joint 603, the upper end face of the second conversion joint 603 is fixedly connected to the second transmission tube 604, and the upper end face of the second transmission tube 604 is fixedly connected to the second three-way joint 605. When the pipeline is filled with water, the first ball valve 507 and the second ball valve 610 are closed. At this time, the first pore pressure sensor 513 and the second pore pressure sensor 608 are in a saturated state.

[0039] like Figure 3 and Figure 6 As shown, the outer surface of the second three-way joint 605 is fixedly connected to the second right-angle elbow 606, the lower end surface of the second right-angle elbow 606 is fixedly connected to the second reducer 607, the second reducer 607 is connected to the second three-way joint 605, the lower end surface of the second reducer 607 is fixedly connected to the second pore pressure sensor 608, the second pore pressure sensor 608 is matched with the cylinder 1, when the bottom end of the outer guide tube 501 touches the soil layer, the disturbance of the soil body caused by the sinking of the foundation causes the pore water pressure in the soil to change, and the water pressure change can be transmitted to the first pore pressure sensor 513 and the second pore pressure sensor 608 in real time through the pipeline.

[0040] like Figure 3 and Figure 6 As shown, the upper end surface of the second three-way connector 605 is fixedly connected to the second connecting tube 609, the second ball valve 610 is matched inside the second connecting tube 609, the upper end surface of the second connecting tube 609 is fixedly connected to the second quick-connect connector 611, the output end of the syringe 613 is fixedly connected to the hose 612, the hose 612 and the second quick-connect connector 611 are matched, and the setting of the second quick-connect connector 611 can enable the syringe 613 to be quickly connected to the second connecting tube 609.

[0041] like Figure 1-Figure 3 As shown, a water outlet 7 is fixedly connected to the top of the cylinder 1, and the water outlet 7 is connected to the cylinder 1. A support rod 9 is fixedly connected to the top of the cylinder 1, and a bracket 10 is fixedly connected to the upper end surface of the support rod 9. The bracket 10 is used to provide installation support for the first measuring component 5 and the second measuring component 6. Then the foundation is pulled out by injecting water into the water outlet 7 or using a crane to lift the foundation until it is pulled out of the soil, completing the pore pressure measurement and recovering the device after the foundation is lifted.

[0042] In the present invention, when measuring the pore pressure of underwater soil, the support rod 9 and the bracket 10 are used in combination to form a support base to provide installation support for the pipelines of the first measuring component 5 and the second measuring component 6. The outer clamp 3 is used to limit and fix the outer guide tube 501 at the outer wall position of the cylinder 1. The inner clamp 4 is used to limit and fix the inner guide tube 601 at the inner wall position of the cylinder 1. The first microporous water-permeable sheet 502 and the second microporous water-permeable sheet 602 are used in combination to provide protection for the bottom opening positions of the outer guide tube 501 and the inner guide tube 601, respectively, to achieve filtering of soil particles and effectively avoid the problem of pipeline blockage. The inner guide tube 501 and the outer guide tube 601 are both made of stainless steel. The material is adjustable in length and rigidly connected to the cylinder 1, which enhances the coordination between the inner guide tube 501 and the outer guide tube 601 and the foundation, so that the pore pressure measurement position in the soil can be accurately located, and can be applied to the rapid installation and recovery of pore pressure measurement equipment for different soil model tests. The inner guide tube 501 and the outer guide tube 601 are made of rigid materials and can easily pass through the soil layer without drilling holes for pre-embedding. The first transmission tube 504 and the second transmission tube 604 are both made of nylon tubes made of PVC material, which are both soft and have certain rigidity characteristics, have good compressive and tensile strength, and are not easy to deform. At the beginning of the measurement, water is injected into the pipeline, and then the high-pressure air pump 512 is operated. After the high-pressure air pump 512 is operated, it can Through the connection of the air pipe 511, the first connecting pipe 506, the first three-way joint 505, the first transmission pipe 504 and the outer guide pipe 501, the air tightness of the pipeline is tested. At the same time, the high-speed airflow generated by the operation of the high-pressure air pump 512 can play a role in clearing the pipeline. Then, the pipeline is pumped with water to saturate it through the use of the syringe 613. When the pipeline is full of water, the first ball valve 507 and the second ball valve 610 are closed. At this time, the first pore pressure sensor 513 and the second pore pressure sensor 608 are in a saturated state, and the pipelines of the first measuring component 5 and the second measuring component 6 are full of water. As the foundation sinks, the water outside the cylinder 1 is extracted to drive the cylinder 1 to penetrate downward, and the outer guide pipe 501 gradually moves with the foundation. After entering the soil, when the bottom end of the outer guide tube 501 contacts the soil layer, the disturbance of the soil by the foundation sinking causes the pore water pressure in the soil to change. The water pressure change can be transmitted to the first pore pressure sensor 513 and the second pore pressure sensor 608 in real time through the pipeline. Then the foundation is pulled out by injecting water into the water outlet 7 or using a crane to lift the foundation until the soil is pulled out. After the pore pressure measurement is completed and the foundation is lifted, the device is recovered, the first ball valve 507 and the second ball valve 610 are opened to allow the water in the pipeline to flow out and release the pressure in the pipeline. The first pore pressure sensor 513 and the second pore pressure sensor 608 are unscrewed to realize the recovery of the sensors, the outer clamp 3 and the inner clamp 4 are removed, and the first measuring component 5 and the second measuring component 6 are recovered.

[0043] The wiring diagram of the high-pressure air pump 512, the first pore pressure sensor 513 and the second pore pressure sensor 608 in the present invention is common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring layout of the high-pressure air pump 512, the first pore pressure sensor 513 and the second pore pressure sensor 608 will not be explained in detail.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for rapidly measuring pore pressure during the sinking process in a barrel foundation soil, characterized in that: It comprises a cylinder (1), a plurality of outer clamps (3) are fixedly connected at equal intervals to the outer surface of the cylinder (1), and a plurality of inner clamps (4) are fixedly connected at equal intervals to the inner surface of the cylinder (1); A first measuring assembly (5), the first measuring assembly (5) is used for measuring the basic external pore pressure, the first measuring assembly (5) is fixedly connected to the cylinder (1), the first measuring assembly (5) comprises an outer guide tube (501) and a high-pressure air pump (512), the outer guide tube (501) is fixedly connected to the outer surface of the cylinder (1), and the outer guide tube (501) fits the outer wall of the cylinder (1); A second measuring assembly (6), the second measuring assembly (6) is used for basic internal pore pressure measurement, the second measuring assembly (6) is fixedly connected to the cylinder (1), the second measuring assembly (6) comprises an inner guide tube (601) and a syringe (613), the inner guide tube (601) is fixedly connected to the inner surface of the cylinder (1), the upper end surface of the inner guide tube (601) passes through the cylinder (1) and extends to the upper side, and the lower end surface of the inner guide tube (601) is located at the bottom of the cylinder (1); A first microporous water-permeable sheet (502) is arranged on the lower end surface of the outer guide tube (501); a first conversion joint (503) is fixedly connected to the upper end surface of the outer guide tube (501); a first transmission tube (504) is fixedly connected to the upper end surface of the first conversion joint (503); and a first three-way joint (505) is fixedly connected to the upper end surface of the first transmission tube (504); The outer surface of the first three-way joint (505) is fixedly connected to a first right-angle bend joint (508); the lower end surface of the first right-angle bend joint (508) is fixedly connected to a first diameter reducing conversion joint (509); the first diameter reducing conversion joint (509) is connected to the first three-way joint (505); the lower end surface of the first diameter reducing conversion joint (509) is fixedly connected to a first pore pressure sensor (513); the first pore pressure sensor (513) is matched with the cylinder (1); The upper end surface of the first three-way connector (505) is fixedly connected to a first connecting pipe (506), a first ball valve (507) is matchedly arranged inside the first connecting pipe (506), and the upper end surface of the first connecting pipe (506) is fixedly connected to a first quick-connect connector (510); The output end of the high-pressure air pump (512) is fixedly connected to an air pipe (511), the air pipe (511) and the first quick-connect connector (510) are matched, and the air pipe (511) and the first connecting pipe (506) are connected; The lower end surface of the inner guide tube (601) is fixedly connected to a second microporous water-permeable sheet (602), the upper end surface of the inner guide tube (601) is fixedly connected to a second conversion joint (603), the upper end surface of the second conversion joint (603) is fixedly connected to a second transmission tube (604), and the upper end surface of the second transmission tube (604) is fixedly connected to a second three-way joint (605); A second right-angle bend joint (606) is fixedly connected to the outer surface of the second three-way joint (605); a second diameter reducing conversion joint (607) is fixedly connected to the lower end surface of the second right-angle bend joint (606); the second diameter reducing conversion joint (607) is connected to the second three-way joint (605); a second pore pressure sensor (608) is fixedly connected to the lower end surface of the second diameter reducing conversion joint (607); and the second pore pressure sensor (608) is matched with the cylinder (1).

2. The device for rapidly measuring pore pressure in the soil during the sinking process of a cylindrical foundation according to claim 1 is characterized in that: The upper end surface of the second three-way connector (605) is fixedly connected to a second connecting pipe (609), a second ball valve (610) is matched inside the second connecting pipe (609), the upper end surface of the second connecting pipe (609) is fixedly connected to a second quick-connect connector (611), the output end of the syringe (613) is fixedly connected to a hose (612), and the hose (612) and the second quick-connect connector (611) are matched.

3. The device for rapidly measuring pore pressure in the process of sinking in a barrel foundation soil according to claim 1 is characterized in that: The top of the cylinder (1) is fixedly connected with a water outlet (7), the water outlet (7) being communicated with the cylinder (1), the top of the cylinder (1) is fixedly connected with a support rod (9), the upper end surface of the support rod (9) is fixedly connected with a bracket (10), and the bracket (10) is used to provide installation support for the first measuring component (5) and the second measuring component (6).

4. A method for measuring the pore pressure of a device for rapidly measuring the pore pressure during the sinking process of a cylindrical foundation, characterized in that: The device for rapidly measuring pore pressure in a cylindrical foundation soil during sinking as claimed in any one of claims 1 to 3 comprises the following steps: S1. When measuring the pore pressure of an underwater soil body, the support rod (9) and the bracket (10) are used in combination to form a support base to provide installation support for the pipelines of the first measuring component (5) and the second measuring component (6); the outer clamp (3) is used to limit and fix the outer guide tube (501) at the outer wall position of the cylinder (1); the inner clamp (4) is used to limit and fix the inner guide tube (601) at the inner wall position of the cylinder (1); the first microporous water-permeable sheet (502) and the second microporous water-permeable sheet (602) are used in combination to provide protection for the bottom opening positions of the outer guide tube (501) and the inner guide tube (601), respectively, so as to achieve filtering of soil particles; S2. When the measurement starts, water is injected into the pipeline, and then the high-pressure air pump (512) is operated. After the high-pressure air pump (512) is operated, the air tightness of the pipeline can be tested through the connection of the air pipe (511), the first connecting pipe (506), the first three-way joint (505), the first transmission pipe (504) and the outer guide pipe (501). At the same time, the high-speed airflow generated by the operation of the high-pressure air pump (512) can play a role in clearing the pipeline; S3, then use the syringe (613) to pump water into the pipeline to saturate it. When the pipeline is full of water, close the first ball valve (507) and the second ball valve (610). At this time, the first pore pressure sensor (513) and the second pore pressure sensor (608) are in a saturated state, and the pipelines of the first measuring component (5) and the second measuring component (6) are full of water. As the foundation sinks, the water outside the cylinder (1) is pumped out to drive the cylinder (1) to penetrate downward, and the outer guide pipe (501) gradually enters the soil along with the foundation; S4. When the bottom end of the outer guide tube (501) touches the soil layer, the disturbance of the soil body caused by the foundation sinking causes the pore water pressure in the soil to change. The water pressure change can be transmitted to the first pore pressure sensor (513) and the second pore pressure sensor (608) in real time through the pipeline. Then the foundation is pulled out, and the foundation is lifted by injecting water into the water outlet (7) or using a crane until the soil body is pulled out. After the pore pressure measurement is completed and the foundation is lifted, the device is recovered. The switches of the first ball valve (507) and the second ball valve (610) are opened to allow the water in the pipeline to flow out and release the pressure in the pipeline. The first pore pressure sensor (513) and the second pore pressure sensor (608) are unscrewed to realize the recovery of the sensors. The outer clamp (3) and the inner clamp (4) are removed, and the first measurement component (5) and the second measurement component (6) are recovered.

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