CN112683431B - T-Bar device capable of simultaneously measuring suction force and resistance force borne by T-Bar - Google Patents
T-Bar device capable of simultaneously measuring suction force and resistance force borne by T-Bar Download PDFInfo
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- CN112683431B CN112683431B CN202011494468.2A CN202011494468A CN112683431B CN 112683431 B CN112683431 B CN 112683431B CN 202011494468 A CN202011494468 A CN 202011494468A CN 112683431 B CN112683431 B CN 112683431B
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Abstract
The invention belongs to the technical field of ocean engineering geotechnical test soft clay testing, and provides a T-Bar device capable of simultaneously measuring the suction force and the resistance force borne by the T-Bar. The device has the advantages of novel structure, convenient use, low manufacturing cost and simple operation, can accurately and simultaneously measure the suction force and the resistance force of the T-Bar in the soft clay during the circular motion, and is convenient for further analyzing the T-Bar mechanism.
Description
Technical Field
The invention belongs to the technical field of ocean engineering geotechnical test soft clay testing, and relates to a T-Bar device capable of simultaneously measuring the suction force and resistance borne by T-Bar.
Background
With the development of ocean engineering in recent years, the ocean engineering is gradually changed from offshore and shallow sea to open sea and deep sea, and the scale of the ocean engineering is also continuously increased. This puts higher demands on surveying the bearing capacity of soil in the design of ocean engineering and measuring clay parameters in geotechnical model tests. Randolph in 1996 proposed a T-shaped full flow penetrometer (T-Bar) suitable for undersea soft soil and indicated that it can be used for soft soil non-drainage shear strength testing. T-Bar has reliability in measuring the anhydrous shear strength of the soft clay. With the expansion of engineering scale and the improvement of the requirement on test precision, the static sounding test technology is continuously improved. The T-Bar has the characteristics of high efficiency, high precision and low cost, and is widely applied to clay testing. The use of the novel sensor purposefully widens the function and the precision of the static sounding test. At present, the research of the domestic full-flow penetrometer is generally in a starting stage. China urgently needs to design and develop test equipment widely suitable for the seabed soft soil environment in China. In the field of ocean platforms, the suction force at the bottom of the foundation when the movable mining and storing platform self-pulls the pile is a negative factor. In practical engineering, if no engineering measures are taken to reduce the adsorption force between the bottom surface and the soil body, personnel and equipment have greater risks, so that the measures for eliminating the suction force of the substrate need to be demonstrated. However, the T-Bar in the current static cone penetration test technology can only test the resistance and pore pressure in the penetration process, and the adsorption force and the resistance force of the probe in different surface directions cannot be respectively specifically quantified during cyclic penetration, which is a great difficulty in researching the suction force of ocean engineering.
The invention provides a T-Bar probe which divides a T-Bar probe into an upper lobe and a lower lobe, transmits force to two force sensors respectively and is used for simultaneously measuring the suction force and the resistance force applied to the T-Bar in the movement process.
Disclosure of Invention
The invention provides a T-Bar device capable of simultaneously measuring the suction force and the resistance force borne by the T-Bar, which comprises a T-Bar probe, an actuating device and data acquisition equipment.
The technical scheme of the invention is as follows:
a T-Bar device capable of simultaneously measuring the suction force and the resistance force borne by the T-Bar is characterized in that a T-Bar probe is divided into an upper lobe and a lower lobe, force is respectively transmitted to two force sensors, the T-Bar probe is used for simultaneously measuring the suction force and the resistance force borne by the T-Bar in the movement process, and the T-Bar device comprises an actuating device and data acquisition equipment;
the T-Bar probe comprises a T-Bar lower lobe 1, a T-Bar upper lobe 2, a pull pressure sensor I3, a dowel Bar 4, a dowel Bar protective sleeve 5, a sensor protective sleeve base 6, a pull pressure sensor II 7, a sensor signal wire 8 and a hole pressure sensor 9; two ends of the dowel Bar 4 are respectively connected with the T-Bar lower valve 1 and the second pull pressure sensor 7, the pull pressure borne by the T-Bar lower valve 1 is transmitted to the second pull pressure sensor 7, and signals are output through a sensor signal line 8; T-Bar upper petal 2 is worn on dowel Bar 4, it links to each other with pulling pressure sensor 3, pulling pressure sensor 3 links to each other with sensor protective sheath base 6 through dowel Bar protective sheath 5, wherein T-Bar upper petal 2 is smooth frictionless with 4 junctions of dowel Bar, pulling pressure sensor 3 arranges sensor signal line 8 through the clearance in dowel Bar 4 and dowel Bar protective sheath 5 and comes the output signal, hole pressure sensor 9 is located 1 bottom central point of T-Bar lower petal, its signal line assembles in sensor signal line 8 through dowel Bar 4 and comes the output signal.
The actuating device comprises a servo motor control cabinet 10, an actuator bracket 11, a servo motor actuator 12 and a connecting rod 13; when test preparation is carried out, a soil sample model box 17 is placed on a base of an actuator support 11, the end faces of a sensor protective sleeve base 6 of a T-Bar18 and a tension and pressure sensor II 7 are connected with a connecting rod 13, driving parameters of a servo motor actuator 12 are configured on a servo motor control cabinet 10 according to the penetration speed and the penetration mode required by the T-Bar18 in the test process, and the servo motor actuator 12 enables the T-Bar18 to move in clay through the connecting rod 13, so that data are measured;
the data acquisition equipment comprises a sensor signal line 8, a data acquisition card 14, a communication line 16 and an upper computer 15; in the test process, electric signals fed back by the first tension and pressure sensor 3 and the second tension and pressure sensor 7 are output to the data acquisition card 14 through the sensor signal line 8 for signal processing, the data acquisition card 14 inputs the acquired and processed electric signals into the upper computer 15 through the communication line 16, and the acquired signals are stored in the upper computer 15 to obtain suction force and resistance values for manual processing and analysis.
A method for simultaneously measuring the suction force and the resistance force borne by T-Bar by using T-Bar comprises the following steps:
s1, selecting a fixed mould box at the measuring point position on an actuator bracket according to the requirement and leveling; s2, turning on power supplies of all the devices; s3, configuring servo motor driving parameters on the servo motor control cabinet according to the penetration speed and the penetration mode required by the T-Bar; s4, testing the signal transmission condition between the upper and lower sensors of the T-Bar and the acquisition card and the upper computer to ensure that the sensors work normally; s5, starting a penetration test and storing the collected data in an upper computer; s6, returning the actuator to an initial state and turning off the power supplies of all the devices after the test is finished; and S7, specifically analyzing the stored suction and resistance data.
The invention relates to a T-Bar form which can simultaneously measure the suction force and the resistance force borne by the T-Bar.
The invention has the beneficial effects that: the device has the advantages of novel structure, convenient use, low manufacturing cost and simple operation, can accurately and simultaneously measure the suction force and the resistance force of the T-Bar in the soft clay during the circular motion, and is convenient for further analyzing the T-Bar mechanism.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of an overall test system according to the present invention.
In the figure: 1T-Bar valve; 2T-Bar upper lobe; 3, pulling the pressure sensor I; 4, a dowel bar; 5 a dowel bar protective sleeve; 6, a sensor protective sleeve base; 7, pulling a pressure sensor II; 8 sensor signal lines; a 9-hole pressure sensor; 10 servo motor control cabinet; 11 an actuator support; 12 a servo motor actuator; 13 connecting rods; 14, a data acquisition card; 15, an upper computer; 16 communication lines; 17, a soil sample model box; 18T-Bar; 19 test platform.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in figures 1 and 2, the T-Bar probe comprises an actuating device and a data acquisition device, wherein the T-Bar probe is divided into an upper lobe and a lower lobe, the upper lobe and the lower lobe respectively transmit force to two force sensors, and the force sensors are used for simultaneously measuring the suction force and the resistance force of the T-Bar in the movement process.
The T-Bar probe comprises a T-Bar lower lobe 1, a T-Bar upper lobe 2, a first pull pressure sensor 3, a dowel Bar 4, a dowel Bar protective sleeve 5, a sensor protective sleeve base 6, a second pull pressure sensor 7, a sensor signal wire 8 and a hole pressure sensor 9. The dowel Bar 4 is tightly connected with the T-Bar lower valve 1 and the second pull pressure sensor 7, the pull pressure borne by the T-Bar lower valve 1 is transmitted to the second pull pressure sensor 7, and signals are output through a sensor signal line 8; the T-Bar upper petal 2 is closely connected with a tension and pressure sensor I3, the tension and pressure sensor I3 is connected with a sensor protective sleeve base 6 through a dowel Bar protective sleeve 5 to work, wherein the junction of the T-Bar upper petal 2 and the dowel Bar 4 is smooth and basically free of friction, a sensor signal line 8 is arranged at the inner clearance of the tension and pressure sensor I3 through the dowel Bar 4 and the dowel Bar protective sleeve 5 to output signals, the hole pressure sensor 9 is located at the central position of the bottom of the T-Bar lower petal 1, and the signal line is converged on the sensor signal line 8 through the dowel Bar 4 to output signals.
The actuating device comprises a servo motor control cabinet 10, an actuator bracket 11, a servo motor actuator 12 and a connecting rod 13. When test preparation is carried out, a soil sample model box 17 is placed on a base of an actuator support 11, the end faces of a sensor protective sleeve base 6 of the T-Bar18 and a tension and pressure sensor II 7 are connected with a connecting rod 13, driving parameters of a servo motor actuator 12 are configured on a servo motor control cabinet 10 according to the penetration speed and the penetration mode required by the T-Bar in the test process, and the servo motor actuator 12 enables the T-Bar18 to move in clay through the connecting rod 13, so that data are measured.
The data acquisition equipment comprises a sensor signal line 8, a data acquisition card 14, a communication line 16 and an upper computer 15. In the test process, electric signals fed back by the first tension and pressure sensor 3 and the second tension and pressure sensor 7 are output to the data acquisition card 14 through the sensor signal line 8 for signal processing, the data acquisition card 14 inputs the acquired and processed electric signals into the upper computer 15 through the communication line 16, and the acquired signals are stored in the upper computer 15 to obtain suction force and resistance values for manual processing and analysis.
The invention relates to a T-Bar form which can simultaneously measure the suction force and the resistance force borne by the T-Bar.
The device has the advantages of novel structure, convenient use, low manufacturing cost and simple operation, can accurately and simultaneously measure the suction force and the resistance force of the T-Bar in the soft clay during the circular motion, and is convenient for further analyzing the T-Bar mechanism.
A T-Bar form capable of simultaneously measuring the suction force and the resistance force applied to the T-Bar comprises the following specific operation steps:
s1, selecting a fixed mould box at the measuring point position on an actuator bracket according to the requirement and leveling; s2, turning on power supplies of all the devices; s3, configuring servo motor driving parameters on the servo motor control cabinet according to the penetration speed and the penetration mode required by the T-Bar; s4, testing the signal transmission condition between the upper and lower sensors of the T-Bar and the acquisition card and the upper computer to ensure that the sensors work normally; s5, starting a penetration test and storing the collected data in an upper computer; s6, returning the actuator to an initial state and turning off the power supplies of all the devices after the test is finished; and S7, specifically analyzing the stored suction and resistance data.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (1)
1. A T-Bar device capable of simultaneously measuring the suction force and the resistance force borne by the T-Bar is characterized in that a T-Bar probe is divided into an upper lobe and a lower lobe, the upper lobe and the lower lobe respectively transmit force to two force sensors, the T-Bar probe is used for simultaneously measuring the suction force and the resistance force borne by the T-Bar in motion, and the T-Bar device comprises an actuating device and data acquisition equipment;
the T-Bar probe comprises a T-Bar lower valve (1), a T-Bar upper valve (2), a first pull pressure sensor (3), a dowel Bar (4), a dowel Bar protective sleeve (5), a sensor protective sleeve base (6), a second pull pressure sensor (7), a sensor signal line (8) and a hole pressure sensor (9); two ends of the dowel Bar (4) are respectively connected with the T-Bar lower valve (1) and the pull pressure sensor II (7), the pull pressure borne by the T-Bar lower valve (1) is transmitted to the pull pressure sensor II (7), and signals are output through a sensor signal line (8); the T-Bar upper petal (2) penetrates through the dowel Bar (4) and is connected with a pull pressure sensor I (3), the pull pressure sensor I (3) is connected with a sensor protective sleeve base (6) through a dowel Bar protective sleeve (5), the junction of the T-Bar upper petal (2) and the dowel Bar (4) is smooth and free of friction, a sensor signal line (8) is arranged at the inner clearance of the dowel Bar (4) and the dowel Bar protective sleeve (5) to output a signal, the hole pressure sensor (9) is located at the center of the bottom of the T-Bar lower petal (1), and the signal line is converged on the sensor signal line (8) through the dowel Bar (4) to output the signal;
the actuating device comprises a servo motor control cabinet (10), an actuator bracket (11), a servo motor actuator (12) and a connecting rod (13); when test preparation is carried out, a soil sample model box (17) is placed on a base of an actuator support (11), the end faces of a sensor protective sleeve base (6) of a T-Bar (18) and a tension and pressure sensor II (7) are connected with a connecting rod (13), driving parameters of a servo motor actuator (12) are configured on a servo motor control cabinet (10) according to the penetration speed and the penetration mode required by the T-Bar (18) in the test process, and the servo motor actuator (12) enables the T-Bar (18) to move in clay through the connecting rod (13), so that data are measured;
the data acquisition equipment comprises a sensor signal line (8), a data acquisition card (14), a communication line (16) and an upper computer (15); in the test process, electric signals fed back by the first tension and pressure sensor (3) and the second tension and pressure sensor (7) are output to a data acquisition card (14) through a sensor signal line (8) for signal processing, the data acquisition card (14) inputs the acquired and processed electric signals into an upper computer (15) through a communication line (16), and the acquired signals are stored in the upper computer (15) so as to obtain a suction force and a resistance value for manual processing and analysis.
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| CN202011494468.2A CN112683431B (en) | 2020-12-17 | 2020-12-17 | T-Bar device capable of simultaneously measuring suction force and resistance force borne by T-Bar |
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| CN202011494468.2A CN112683431B (en) | 2020-12-17 | 2020-12-17 | T-Bar device capable of simultaneously measuring suction force and resistance force borne by T-Bar |
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| CN112683431B true CN112683431B (en) | 2021-10-15 |
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| CN114658043A (en) * | 2022-03-07 | 2022-06-24 | 中国电建集团华东勘测设计研究院有限公司 | Pile-soil horizontal static load interaction analysis method based on T-bar p-y curve |
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