CN211447045U - Horizontal and vertical load loading test device for foundation of offshore pile cap - Google Patents
Horizontal and vertical load loading test device for foundation of offshore pile cap Download PDFInfo
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- CN211447045U CN211447045U CN201921803354.4U CN201921803354U CN211447045U CN 211447045 U CN211447045 U CN 211447045U CN 201921803354 U CN201921803354 U CN 201921803354U CN 211447045 U CN211447045 U CN 211447045U
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Abstract
The utility model provides a horizontal and vertical load loading test device for a foundation of an offshore pile cap, which comprises a model component, a horizontal loading system, a vertical loading system, a control system and a data acquisition system; the model assembly comprises a test box, a bearing platform and a plurality of test piles, wherein the plurality of test piles are fixed below the bearing platform, and the lower parts of the test piles are embedded in the test box through a test soil body; the horizontal loading system comprises a support column and a horizontal servo electric cylinder; the vertical loading system comprises a horizontal reaction frame, a vertical servo electric cylinder and a loading plate; the control system comprises a horizontal servo driver, a vertical servo driver, a PLC (programmable logic controller) and an upper computer PC (personal computer); the data acquisition system comprises a displacement sensor, a strain gauge and a data processing computer. The utility model discloses simple structure, the higher operation of degree of automation is comparatively easy, selects for use servo electronic jar to exert the load to experimental stake and cushion cap model, has ensured the loading precision, and the error is less relatively.
Description
Technical Field
The utility model relates to a pile foundation model test field especially relates to a marine cushion cap pile foundation level is to reaching vertical load loading test device.
Background
In recent years, with the increasing of the consumption of oil and gas resources and the increasing of the exploitation speed of crude oil on land in the world, more and more attention is paid to oil and gas exploration and development in the ocean field, the ocean engineering such as large-scale offshore drilling platforms develops very rapidly, the construction of cross-sea bridges is also rapidly developed along with the change of road and railway traffic patterns, and the pile group foundation of offshore bearing platforms is the most main foundation form adopted by the ocean engineering. The offshore pile cap foundation often bears the superposition of vertical load and horizontal random wind and wave load, and the requirements of the projects on the bearing characteristics of the pile foundations are high, so that the research on the bearing characteristics of the offshore pile cap foundation under the combined load is of great significance. The offshore wind and wave load has the characteristics of periodicity, randomness and direction variability, and the existing device cannot truly and effectively simulate the actual characteristics of the offshore wind and wave load, so that the research of the group pile loading device capable of truly and effectively simulating the vertical load and the horizontal random wind and wave load borne by the offshore bearing platform becomes necessary.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a marine cushion cap pile foundation level is to reaching vertical load loading test device, aims at being used for realizing vertical static loading, level to random stormy wave loading and level to vertical combination loading to the bearing characteristic of analysis research ocean cushion cap pile foundation under the combination load.
The utility model discloses a realize like this:
the utility model provides a horizontal and vertical load loading test device for a foundation of an offshore pile cap, which comprises a model component, a horizontal loading system, a vertical loading system, a control system and a data acquisition system;
the model component comprises a test box, a bearing platform and a plurality of test piles, wherein the bearing platform is arranged in the test box, the plurality of test piles are fixed below the bearing platform, and the lower parts of the test piles are embedded in the test box through a test soil body;
the horizontal loading system comprises a support column and a horizontal servo electric cylinder, the support column is fixed in the center of the top of the bearing platform, and the horizontal servo electric cylinder horizontally acts on the periphery of the support column;
the vertical loading system comprises a horizontal reaction frame, a vertical servo electric cylinder and a loading plate, the horizontal reaction frame is installed at the top end of the test box, the vertical servo electric cylinder is fixed in the middle of the horizontal reaction frame, the loading plate is arranged on the upper portion of the supporting column, and the vertical servo electric cylinder vertically acts on the loading plate;
the control system comprises a horizontal servo driver, a vertical servo driver, a PLC (programmable logic controller) and an upper computer PC (personal computer), wherein a horizontal servo electric cylinder is electrically connected with the horizontal servo driver, the vertical servo electric cylinder is electrically connected with the vertical servo driver, the horizontal servo driver and the vertical servo driver are electrically connected with the PLC, the PLC is electrically connected with the upper computer PC, and the upper computer PC is used for programming the PLC to input waveforms and frequencies simulating vertical loads and horizontal random wind and wave loads borne by the offshore bearing platform;
the data acquisition system comprises a displacement sensor, strain gauges and strain gauges, wherein the displacement sensor is arranged on the loading plate, the strain gauges are multiple and are all adhered inside the test pile, each strain gauge is connected with the strain gauge, and the displacement sensor and the strain gauge are both connected with a data processing computer.
Furthermore, the control system further comprises a pressure sensor, the pressure sensor is installed at the front end of the piston rod of the vertical servo electric cylinder and used for measuring vertical load signals actually received by the test pile and the bearing platform model and feeding back the vertical load signals to the vertical servo driver, and the vertical servo driver adjusts the vertical load applied to the test pile and the bearing platform model by the vertical servo electric cylinder according to the signals fed back by the pressure sensor.
Further, the level still includes annular guide rail, electronic pulley, annular steel hoop and groove piece to loading system, annular steel hoop cup joints fixedly on the support column, the one end of groove piece be the arc and with annular steel hoop in close contact with, the other end with the level is connected to the piston rod of servo electronic jar, the level to servo electronic jar the other end with electronic pulley is connected, annular guide rail installs on the proof box upper portion inside wall, electronic pulley installs on the annular guide rail.
Furthermore, a variable frequency motor is arranged inside the electric pulley, and the variable frequency motor is electrically connected with the horizontal servo driver.
Further, the horizontal reaction frame is detachably connected with the test box.
Further, the test box also comprises a vertical reaction frame, wherein the vertical reaction frame is fixed on the test box, and the horizontal reaction frame and the vertical reaction frame are fastened together through fastening bolts.
Further, a damping base plate is fixed between the horizontal reaction frame and a front end support of the vertical servo electric cylinder through bolts.
Furthermore, the power supply devices of the horizontal servo driver, the vertical servo driver, the PLC, the horizontal servo electric cylinder and the vertical servo electric cylinder are all installed in an electric cabinet box, and the electric cabinet box is placed around the test box.
Further, the upper computer PC has a touch screen, and is provided with a switch setting unit, a speed setting unit, a load setting unit, and a hold time setting unit, and the switch setting unit, the speed setting unit, the load setting unit, and the hold time setting unit are respectively used for setting a switch, a speed, a load, and a hold time.
Compared with the prior art, the utility model discloses following beneficial effect has:
the device for the horizontal and vertical load loading test of the foundation of the offshore pile cap has the advantages that the structure is simple, the automation degree is high, the operation is easy, the servo electric cylinder is selected to apply load to the test pile and the pile cap model, the loading precision is ensured, and the error is relatively small; according to the device, the supporting columns are mounted on the upper portion of the bearing platform and fastened on the bearing platform, horizontal loads can be applied to the test pile and the bearing platform model by applying the horizontal loads to the supporting columns, the fact that the acting points of vertical loads of the test pile do not deviate under the action of the horizontal loads is guaranteed, and the accuracy of a test is guaranteed; the device can more truly simulate the stress characteristic of the offshore pile cap foundation under the actual combined load by applying vertical static loading and horizontal random circulating wind and wave loads to the model.
Drawings
Fig. 1 is a front view of a horizontal and vertical load loading test device for a foundation of an offshore pile cap according to an embodiment of the present invention;
fig. 2 is the embodiment of the utility model provides a horizontal and vertical load loading test device's of marine cushion cap pile basis plan view.
Description of reference numerals: 1. a shock-absorbing base plate; 2. a vertical servo electric cylinder; 3. a displacement sensor; 4. a loading plate; 5. a pressure sensor; 6. an electric pulley; 7. an annular steel hoop; 8. a horizontal servo electric cylinder; 9. a groove block; 10. a support pillar; 11. a strain gauge; 12. an upper computer PC; 13. an electric cabinet box; 14. a horizontal reaction frame; 15. fastening a bolt; 16. an annular guide rail; 17. a vertical reaction frame; 18. a bearing platform; 19. testing piles; 20. a strain gauge; 21. a test chamber; 22. a steel twisting frame.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in FIG. 1 and FIG. 2, the embodiment of the utility model provides a marine cushion cap stake basis level is to reaching vertical load loading test device, including model component, level to loading system, vertical loading system, control system and data acquisition system.
The model assembly comprises a test box 21, a bearing platform 18 and a plurality of test piles 19, wherein the test box 21 is a round steel barrel formed by welding steel beams, the upper part of the test box is provided with an opening, the bearing platform 18 is arranged in the test box 21, the test piles 19 are fixed below the bearing platform 18 through bolts, and the lower parts of the test piles are embedded in the test box 21 through test soil.
The horizontal loading system comprises a support column 10 and a horizontal servo electric cylinder 8, wherein the support column 10 is fixed at the center of the top of a bearing platform 18 and is fastened with the bearing platform 18 through a bolt, the horizontal servo electric cylinder 8 horizontally acts on the periphery of the support column 10 and is used for applying horizontal load to a pile foundation of the bearing platform, specifically, the horizontal loading system further comprises an annular guide rail 16, an electric pulley 6, an annular steel hoop 7 and a groove block 9, the annular steel hoop 7 is fixedly sleeved on the support column 10, one end of the groove block 9 is arc-shaped and is in close contact with the annular steel hoop 7, specifically, the groove block 9 can tightly wind the annular steel hoop 7 through a steel wire, the groove block 9 can perform circular motion around the annular steel hoop 7, the other end of the groove block 9 is connected with a piston rod of the horizontal servo electric cylinder 8, and the other end of the horizontal servo electric cylinder 8 is connected with the electric pulley 6 through a steel twisting frame 22, the annular guide rail 16 is welded on the inner side wall of the upper portion of the test box 21, the electric pulley 6 is installed on the annular guide rail 16, a variable frequency motor is arranged inside the electric pulley 6 and drives the electric pulley 6 to move on the annular guide rail 16, so that the servo electric cylinder 8 and the groove block 9 in the horizontal direction are driven to move around the annular steel hoop 7, and therefore horizontal loads can be applied to a model formed by the bearing platform 18 and the test pile 19 from different directions.
The vertical loading system comprises a horizontal reaction frame 14, a vertical servo electric cylinder 2 and a loading plate 4, wherein the horizontal reaction frame 14 is installed at the top end of a test box 21, preferably, the horizontal reaction frame 14 is detachably connected with the test box 21, the vertical loading system also comprises a vertical reaction frame 17, the vertical reaction frame 17 is fixed on the test box 21, and the horizontal reaction frame 14 and the vertical reaction frame 17 are fastened together through a fastening bolt 15. The vertical servo electric cylinder 2 is fixed in the middle of the horizontal reaction frame 14, the loading plate 4 is arranged on the upper portion of the supporting column 10, and the front end of the piston rod of the vertical servo electric cylinder 2 is vertically abutted against the loading plate 4. Further, a shock absorption base plate 1 is fixed between the horizontal reaction frame 14 and a front end support of the vertical servo electric cylinder 2 through bolts, and loading stability is guaranteed.
Control system includes level to servo driver, vertical servo driver, PLC controller and host computer PC12, the level to servo electronic jar 8 and electronic pulley 6 with the level is connected to servo driver electricity, vertical servo electronic jar 2 with vertical servo driver electricity is connected, the level to servo driver vertical servo driver all with PLC controller electricity is connected, the PLC controller with host computer PC12 electricity is connected, host computer PC12 is used for right the PLC controller is programmed in order to input simulation marine vertical load that cushion cap received and level to the wave shape and the frequency of random wind and wave load, the level is used for according to the relevant instruction control level of PLC controller applies horizontal load and control the direction of applying to the model to servo electronic jar 8, vertical servo driver is used for according to the relevant instruction control vertical servo electronic jar 2 of PLC controller is to the model A corresponding vertical load is applied.
The data acquisition system comprises a displacement sensor 3, strain gauges 2 and strain gauges 11, wherein the displacement sensor 3 is arranged on the loading plate 4, a plurality of strain gauges 20 are arranged and are adhered inside the test pile 19, each strain gauge 20 is connected with the strain gauge 11, the displacement sensor 3 and the strain gauge 11 are connected with the data processing computer, the displacement sensor 3, the strain gauges 20 and the strain gauges 11 are used for acquiring corresponding data in real time and transmitting the data to the data processing computer, and the data processing computer can directly adopt the upper computer PC 12.
The offshore pile foundation horizontal and vertical load loading test device provided by the embodiment of the utility model has the advantages that the structure is simple, the automation degree is higher, the operation is easier, the servo electric cylinder is selected to apply load to the test pile and the pile foundation model, the loading precision is ensured, and the error is relatively small; according to the device, the supporting columns are mounted on the upper portion of the bearing platform and fastened on the bearing platform, horizontal loads can be applied to the test pile and the bearing platform model by applying the horizontal loads to the supporting columns, the fact that the acting points of vertical loads of the test pile do not deviate under the action of the horizontal loads is guaranteed, and the accuracy of a test is guaranteed; the device can more truly simulate the stress characteristic of the offshore pile cap foundation under the actual combined load by applying vertical static loading and horizontal random circulating wind and wave loads to the model.
Preferably, the control system further comprises a pressure sensor 5, the pressure sensor 5 is installed at the front end of a piston rod of the vertical servo electric cylinder 2 and used for measuring vertical load signals actually received by the test pile and the bearing platform model and feeding back the vertical load signals to the vertical servo driver, and the vertical servo driver adjusts the vertical load applied to the test pile and the bearing platform model by the vertical servo electric cylinder 2 according to the signals fed back by the pressure sensor 5, so that the control precision is improved.
In order to ensure the power consumption safety of the test, the power supply devices of the horizontal servo driver, the vertical servo driver, the PLC, the horizontal servo electric cylinder 8 and the vertical servo electric cylinder 2 are all installed in an electric cabinet box 13, and the electric cabinet box 13 is placed around the test box 21.
Further, the upper computer PC12 has a touch screen, and is provided with a switch setting unit, a speed setting unit, a load setting unit, and a hold time setting unit, and the switch setting unit, the speed setting unit, the load setting unit, and the hold time setting unit are respectively used for setting a switch, a speed, a load, and a hold time.
The embodiment of the utility model provides a still provide a foretell marine cushion cap stake basis level to reaching the load test method of vertical load test device, including following step:
(1) programming the PLC through the PC to input waveforms and frequencies simulating vertical loads and horizontal random wind and wave loads borne by the offshore bearing platform, and calibrating a wind and wave extreme value;
(2) the PLC controller inputs static load changing along with time to the vertical servo driver, the vertical servo driver drives the vertical servo electric cylinder to apply vertical load to the test pile and the bearing platform model after receiving related instructions of the PLC controller, meanwhile, the pressure sensor measures vertical load signals actually received by the test pile and the bearing platform model and feeds the vertical load signals back to the vertical servo driver, and the vertical servo driver adjusts the vertical load applied to the test pile and the bearing platform model by the vertical servo electric cylinder according to the signals fed back by the pressure sensor;
(3) the PLC controller inputs the waveform and frequency of the corresponding horizontal random wind and wave load to the horizontal servo driver, and the horizontal servo driver finally outputs a periodic cyclic load which changes randomly along with time and applies the periodic cyclic load to the test pile and the bearing platform model through the horizontal servo electric cylinder;
(4) in the loading test process, the displacement sensor, the strain gauge and the strain gauge acquire corresponding data in real time and transmit the data to the data processing computer.
The method can carry out different programming processing on the PLC through the PC to set different loading forms of vertical loads and horizontal random storm loads, the servo vertical servo driver can carry out output adjustment according to signals fed back by the pressure sensor, closed-loop control is realized to improve loading precision, the displacement sensor, the strain gauge and the strain gauge acquire corresponding data in real time and transmit the data to the data processing computer, and data observation and corresponding analysis are facilitated.
Preferably, the upper computer PC12 can also be used for manually controlling the options of load capacity, holding time, a switch of a loading device and the like, so that the control precision is improved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A horizontal and vertical load loading test device for a foundation of an offshore pile cap is characterized by comprising a model assembly, a horizontal loading system, a vertical loading system, a control system and a data acquisition system;
the model component comprises a test box, a bearing platform and a plurality of test piles, wherein the bearing platform is arranged in the test box, the plurality of test piles are fixed below the bearing platform, and the lower parts of the test piles are embedded in the test box through a test soil body;
the horizontal loading system comprises a support column and a horizontal servo electric cylinder, the support column is fixed in the center of the top of the bearing platform, and the horizontal servo electric cylinder horizontally acts on the periphery of the support column;
the vertical loading system comprises a horizontal reaction frame, a vertical servo electric cylinder and a loading plate, the horizontal reaction frame is installed at the top end of the test box, the vertical servo electric cylinder is fixed in the middle of the horizontal reaction frame, the loading plate is arranged on the upper portion of the supporting column, and the vertical servo electric cylinder vertically acts on the loading plate;
the control system comprises a horizontal servo driver, a vertical servo driver, a PLC (programmable logic controller) and an upper computer PC (personal computer), wherein the horizontal servo electric cylinder is electrically connected with the horizontal servo driver, the vertical servo electric cylinder is electrically connected with the vertical servo driver, the horizontal servo driver and the vertical servo driver are both electrically connected with the PLC, and the PLC is electrically connected with the upper computer PC;
the data acquisition system comprises a displacement sensor, strain gauges and strain gauges, wherein the displacement sensor is arranged on the loading plate, the strain gauges are multiple and are all adhered inside the test pile, each strain gauge is connected with the strain gauge, and the displacement sensor and the strain gauge are both connected with a data processing computer.
2. The offshore pile foundation horizontal and vertical load loading test device of claim 1, wherein: the control system further comprises a pressure sensor, the pressure sensor is installed at the front end of a piston rod of the vertical servo electric cylinder and used for measuring vertical load signals actually received by the test pile and the bearing platform model and feeding back the vertical load signals to the vertical servo driver, and the vertical servo driver adjusts the vertical load applied to the test pile and the bearing platform model by the vertical servo electric cylinder according to the signals fed back by the pressure sensor.
3. The offshore pile foundation horizontal and vertical load loading test device of claim 1, wherein: the level still includes ring rail, electronic pulley, annular steel hoop and groove piece to loading system, annular steel hoop cup joints to be fixed on the support column, the one end of groove piece be the arc and with annular steel hoop in close contact with, the other end with the level is connected to the piston rod of servo electronic jar, the level to servo electronic jar the other end with electronic pulley is connected, ring rail installs on the inside wall of proof box upper portion, electronic pulley is installed ring rail is last.
4. The offshore cap pile foundation horizontal and vertical load loading test device of claim 3, characterized in that: and a variable frequency motor is arranged in the electric pulley and is electrically connected with the horizontal servo driver.
5. The offshore pile foundation horizontal and vertical load loading test device of claim 1, wherein: the horizontal reaction frame is detachably connected with the test box.
6. The offshore cap pile foundation horizontal and vertical load loading test device of claim 5, characterized in that: the test box is characterized by further comprising a vertical reaction frame, wherein the vertical reaction frame is fixed on the test box, and the horizontal reaction frame and the vertical reaction frame are fastened together through fastening bolts.
7. The offshore pile foundation horizontal and vertical load loading test device of claim 1, wherein: and a damping base plate is fixed between the horizontal reaction frame and the front end support of the vertical servo electric cylinder through a bolt.
8. The offshore pile foundation horizontal and vertical load loading test device of claim 1, wherein: the power supply devices of the horizontal servo driver, the vertical servo driver, the PLC, the horizontal servo electric cylinder and the vertical servo electric cylinder are all installed in an electric cabinet box, and the electric cabinet box is placed around the test box.
9. The offshore pile foundation horizontal and vertical load loading test device of claim 1, wherein: the upper computer PC is provided with a touch screen and is provided with a switch setting unit, a speed setting unit, a loading amount setting unit and a maintaining time setting unit, wherein the switch setting unit, the speed setting unit, the loading amount setting unit and the maintaining time setting unit are respectively used for setting a switch, a speed, a loading amount and a maintaining time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921803354.4U CN211447045U (en) | 2019-10-25 | 2019-10-25 | Horizontal and vertical load loading test device for foundation of offshore pile cap |
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| CN201921803354.4U CN211447045U (en) | 2019-10-25 | 2019-10-25 | Horizontal and vertical load loading test device for foundation of offshore pile cap |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761341A (en) * | 2019-10-25 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Horizontal and vertical load loading test device and method for offshore pile cap foundation |
| CN113931616A (en) * | 2021-10-25 | 2022-01-14 | 中海石油(中国)有限公司湛江分公司 | Omnibearing cyclic loading test device and method for deepwater underwater wellhead system |
-
2019
- 2019-10-25 CN CN201921803354.4U patent/CN211447045U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761341A (en) * | 2019-10-25 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Horizontal and vertical load loading test device and method for offshore pile cap foundation |
| CN113931616A (en) * | 2021-10-25 | 2022-01-14 | 中海石油(中国)有限公司湛江分公司 | Omnibearing cyclic loading test device and method for deepwater underwater wellhead system |
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