CN212200519U - Test device capable of realizing constant force loading of composite model pile of riser pipe - Google Patents
Test device capable of realizing constant force loading of composite model pile of riser pipe Download PDFInfo
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- CN212200519U CN212200519U CN202020668378.XU CN202020668378U CN212200519U CN 212200519 U CN212200519 U CN 212200519U CN 202020668378 U CN202020668378 U CN 202020668378U CN 212200519 U CN212200519 U CN 212200519U
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Abstract
The utility model provides a can realize compound model stake constant force loaded test device of riser, includes: the test soil tank, guide rails oppositely arranged on two sides of the test soil tank, a frame arranged on the guide rails, a vertical loading device and a horizontal loading device which are arranged on the frame side by side and can move along the guide rails, and a reaction frame arranged below the guide rails; the vertical loading device and the horizontal loading device are also connected with the control device, are controlled by the control device and form an electric signal closed loop so as to achieve the purpose of adjusting the loading force to be a constant value in real time. The utility model can simulate the marine static load test, and measure the loading force and the pile head displacement in the loading process, thereby greatly improving the precision and accuracy of the constant force loading of the composite model pile of the riser pipe; moreover, the safety and the stability of the composite pile foundation of the riser pipe are greatly improved; the method has important significance for the stability and safety evaluation of the composite pile foundation of the riser pipe.
Description
Technical Field
The utility model belongs to the offshore oil engineering field especially relates to a can realize loaded test device of water proof pipe composite model stake constant force.
Background
At present, with the development of marine oil and gas in China, particularly the development of marginal oil fields, attention is paid to how to reduce the development cost of the marginal oil fields, and the development of the marginal oil fields becomes a key point. The platform of marginal oil field belongs to small-size platform, and most small-size platform still adopt the mode of driving into the steel-pipe pile to bear superstructure load as the basis.
Existing wellhead structures include: the cementing system comprises a riser, a surface casing, production pipes and well cementing cement casings among the pipes, wherein the combination of the riser and the surface casing can reach the mud penetration depth of hundreds of meters in a platform; the riser pipe and the surface casing pipe are connected by a cement sheath to form a special pile body structure, which is a reducing composite pile with a large upper diameter and a small lower diameter.
The existing detection of the bearing capacity of the pile foundation is carried out by an in-situ static load test, but the offshore construction difficulty is high, the cost is high, and the in-situ static load test of the marine riser composite pile is carried out on the sea, so that the difficulty is high.
In order to solve the above problems, the pile body is usually made into a pile foundation model, and the bearing capacity of the pile body is determined through indoor tests.
In the test of current pile foundation model, it is stable to adopt hydraulic jack control upper portion load usually to reach the purpose of constant force loading step by step, however, because its control accuracy is lower, to this kind of minor diameter stake of water-proof pipe, because of the error that the experiment leads to, must will influence the accuracy of result. Therefore, a set of loading equipment capable of accurately simulating the static load test of the riser composite pile foundation is urgently needed to be developed so as to evaluate the bearing stability of the loading equipment, and the loading equipment has important significance for evaluating the safety of a wellhead platform.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can realize the loaded test device of water proof pipe composite model stake constant force to solve the lower technical problem of control accuracy when testing the minor diameter stake pile foundation model to the water proof pipe class.
In order to achieve the above object, the utility model discloses a can realize that water proof pipe composite model stake constant force loaded test device's concrete technical scheme as follows:
the utility model provides a can realize compound model stake constant force loaded test device of riser, includes: the test soil tank, guide rails oppositely arranged on two sides of the test soil tank, a frame arranged on the guide rails, a vertical loading device and a horizontal loading device which are arranged on the frame side by side and can move along the guide rails, and a reaction frame arranged below the guide rails; the vertical loading device and the horizontal loading device are also connected with the control device, are controlled by the control device and form an electric signal closed loop so as to achieve the purpose of adjusting the loading force to be a constant value in real time.
Furthermore, the test soil groove is a rectangular groove with the length of 1.35m multiplied by 1.4m multiplied by 2.5m, a convex plate protruding out of the test soil groove is arranged on one side surface of the test soil groove, a plurality of concave surfaces which are concave downwards are arranged on the top surface of the test soil groove, and the depths of the concave surfaces which are concave downwards are different.
Further, the guide rail is I-shaped steel.
Furthermore, the frame is of a rectangular structure and is arranged on the top surface of the test soil tank, and U-shaped frames which are matched with the guide rails and can slide on the guide rails are arranged at the two opposite ends of the frame.
Further, the horizontal loading device includes: a plurality of loading fixed beams installed on the frame, a U-shaped frame oppositely installed at both ends of the loading fixed beams, a L-shaped frame installed at both ends of the U-shaped frame, wherein a first servo motor is installed under one end of the L-shaped frame, the first servo motor is connected with one end of a first electric cylinder, the other end of the first electric cylinder is sequentially connected with a first sensor and a first loading rod through a height adjusting plate, and the height adjusting plate is vertically installed at the other end of the first electric cylinder; the first sensor and the first loading lever are mounted below the height-adjustment plate.
Further, the vertical loading device comprises: the loading device comprises a plurality of loading fixed beams, U-shaped frames, a second servo motor and a second electric cylinder, wherein the loading fixed beams are arranged on a frame, the U-shaped frames are oppositely arranged at two ends of the loading fixed beams, and the second servo motor and the second electric cylinder are sequentially and vertically arranged at the center positions above the loading fixed beams, wherein a second sensor and a second loading rod are sequentially and vertically arranged at the center positions below the loading fixed beams.
Further, the control device includes: a touch screen, a vertical servo controller and a horizontal servo controller which are respectively connected with the first servo motor and the second servo motor, wherein, a preset loading force target value is input by the touch screen, a servo motor controlled by a servo controller and horizontally arranged on the servo controller respectively drives a first electric cylinder and a second electric cylinder to move, and force is respectively transmitted to a first loading rod and a second loading rod, the target is loaded, the first sensor and the second sensor feed back the magnitude of the loading force in real time and convert the magnitude into voltage signals to the signal amplifier, the signal amplifier feeds back the amplified voltage value to the vertical servo controller and the horizontal servo controller, the vertical servo controller and the horizontal servo controller read the signal, and adjusting the output signal, controlling the vertical servo controller and the horizontal servo controller to form an electric signal closed loop, and adjusting the loading force to be a constant value in real time.
Furthermore, the reaction frame is a box-shaped frame with the same length as the test soil tank, and the upper surface of the reaction frame is of a cross-shaped frame structure.
Further, the first sensor and the second sensor are S-shaped tension and compression sensors.
The utility model has the advantages of it is following:
the utility model has simple structure, convenient installation and positioning and simple operation; the method can simulate the marine static load test, and measure the loading force and pile head displacement in the loading process, the loading precision can be controlled within +/-3N, and the precision and accuracy of constant force loading on the composite model pile of the riser pipe are greatly improved; moreover, the safety and the stability of the composite pile foundation of the riser pipe are greatly improved; the method has important significance for the stability and safety evaluation of the composite pile foundation of the riser pipe.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;
FIG. 2 is a schematic structural view of the horizontal loading device of the present invention;
fig. 3 is a schematic structural view of the vertical loading device of the present invention;
FIG. 4 is a schematic structural diagram of the control device of the present invention;
fig. 5 is a schematic view of the bearing capacity curve of the composite pile model of the riser pipe of the present invention.
The notation in the figure is:
1. a vertical loading device; 2. a horizontal loading device; 3. a test soil tank; 4. a guide rail; 5. a reaction frame; 6. a first bolt; 6a, a second bolt, 7 and a loading fixed beam; 8. a first servo motor; 8a, a second servo motor, 9 and a first electric cylinder; 9a, a second electric cylinder, 10 and a first sensor; 10a, a second sensor; 11. a first loading lever; 11a, a second loading rod 12 and a height adjusting plate; 13. a signal amplifier; 14. a vertical servo controller; 15. a horizontal servo controller; 16. a touch screen.
Detailed Description
In order to understand the utility model discloses a purpose, structure and function better, combine the figure below, right the utility model relates to a can realize that water proof pipe composite model stake constant force loaded test device does further detailed description.
As shown in fig. 1-5, the present invention includes: the test soil box comprises a test soil box 3, guide rails 4 oppositely arranged on two sides of the test soil box 3, a frame arranged on the guide rails 4, a vertical loading device 1 and a horizontal loading device 2 which are arranged on the frame side by side and can move along the guide rails 4, and a reaction frame 5 arranged below the guide rails 4; the vertical loading device 1 and the horizontal loading device 2 are also connected with the control device, are controlled by the control device and form an electric signal closed loop so as to achieve the purpose of adjusting the loading force to be a constant value in real time.
The test soil trough 3 is a rectangular trough of 1.35m × 1.4m × 2.5m, a convex plate protruding out of the test soil trough 3 is arranged on one side surface of the test soil trough 3, a plurality of (two in this embodiment) concave surfaces are arranged on the top surface, and the depths of the concave surfaces which are concave downward are different.
The guide rail 4 is an i-steel.
The frame is of a rectangular structure and is arranged on the top surface of the test soil tank 3, and U-shaped frames which are matched with the guide rails 4 and can slide on the guide rails 4 are arranged at the two opposite ends of the frame.
As shown in fig. 2, the horizontal loading apparatus 1 includes: a plurality of loading fixing beams 7 (two in this embodiment) mounted on the frame, a U-shaped frame oppositely mounted at both ends of the loading fixing beams 7 by a first bolt 6, a l-shaped frame mounted at both ends of the U-shaped frame, wherein a first servo motor 8 is mounted under one end of the l-shaped frame by a bolt 6, the first servo motor 8 is connected to one end of a first electric cylinder 9, the other end of the first electric cylinder 9 is sequentially connected to a first sensor 10 and a first loading rod 11 by a height adjusting plate 12, and the height adjusting plate 12 is vertically mounted on the other end of the first electric cylinder 9; the first sensor 10 and the first loading lever 11 are installed below the height adjusting plate 12.
As shown in fig. 3, the vertical loading device 1 includes: a plurality of loading fixed beams 7 (two in this embodiment) arranged on the frame, a U-shaped frame arranged at two ends of the loading fixed beam 7 relatively by adopting a second bolt 6a fixing mode, a second servo motor 8a and a second electric cylinder 9a which are arranged on the upper center position of the plurality of loading fixed beams 7 vertically in sequence by adopting a bolt fixing mode, wherein a second sensor 10a and a second loading rod 11a are also arranged on the lower center position of the plurality of loading fixed beams 7 vertically in sequence.
The load fixing beam 7 is a steel beam.
The first sensor 10 and the second sensor 10a are S-shaped tension/compression sensors.
As shown in fig. 4, the control device includes: the touch screen 16, a vertical servo controller 14 and a horizontal servo controller 15 which are respectively connected with the first servo motor 8 and the second servo motor 8a, wherein the touch screen 16 inputs a preset loading force target value, the servo controller 14 and the servo motor of the horizontal servo controller 15 respectively drive the first electric cylinder 9 and the second electric cylinder 9a to move, the force is respectively transmitted to the first loading rod 11 and the second loading rod 11a to load a target, the first sensor 10 and the second sensor 10a feed back the magnitude of the loading force in real time and convert the magnitude into a voltage signal to the signal amplifier 13, the signal amplifier 13 feeds back the amplified voltage value to the vertical servo controller 14 and the horizontal servo controller 15, the vertical servo controller 14 and the horizontal servo controller 15 read the signal and adjust the output signal, the vertical servo controller 14 and the horizontal servo controller 15 are controlled to form an electric signal closed loop, and adjusting the loading force to a constant value in real time.
The reaction frame 5 is a box-shaped frame with the same length as the test soil tank 3, and the upper surface of the reaction frame 5 is of a cross-thread-shaped frame structure.
The utility model discloses during the use, adopt following step:
a first step; preparing saturated clay or sandy soil in a test soil tank 7 to a specified height, leveling the soil surface, and then driving a composite pile model into a target position and a target depth;
the composite pile model is made of an organic glass tube;
a second step; adjusting the position of a loading device, aligning a first loading rod 11 and a second loading rod 11a to the position of the pile head of the composite pile, screwing a first bolt 6 and a second bolt 6a, setting a target loading force in a touch screen 16 of a control device, continuing inputting a next-stage load value after the pile head is settled and stabilized, recording the displacement and the loading force, repeating the steps until the displacement of the pile head is not stabilized under a certain stage of load, and determining that the model pile is damaged at the moment;
otherwise, the following needs to be stated:
the method comprises the steps of dividing 10 stages of loading in the loading process, wherein each stage is 1/10 of the estimated bearing capacity, the first stage is loaded according to 2 times, the estimated bearing capacity of the composite pile model is about 350N through calculation, therefore, the first stage loading capacity is input to 70N, and then the first stage loading capacity is increased according to every 35N stage;
secondly, inputting target loading force 70N into the loading device, clicking to start loading, reading pile head displacement data, loading each level for not less than 1 hour, judging stability according to the settlement within 15min, applying next level load by taking the settlement within 15min as a stability standard, and recording the previous level loading force, namely the settlement reading;
thirdly, as shown in fig. 5, the obtained experimental data are collated, and a bearing capacity-displacement (Q-S) curve is obtained.
A third step; and (5) storing the experimental data, arranging the test equipment, turning off the power supply and finishing the test.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (9)
1. The utility model provides a can realize compound model stake constant force loaded test device of riser, its characterized in that includes: the test soil tank, guide rails oppositely arranged on two sides of the test soil tank, a frame arranged on the guide rails, a vertical loading device and a horizontal loading device which are arranged on the frame side by side and can move along the guide rails, and a reaction frame arranged below the guide rails; the vertical loading device and the horizontal loading device are also connected with the control device, are controlled by the control device and form an electric signal closed loop so as to achieve the purpose of adjusting the loading force to be a constant value in real time.
2. The test device capable of realizing the constant force loading of the composite model pile of the riser pipe according to claim 1, wherein the test soil groove is a rectangular groove with the length of 1.35m × 1.4m × 2.5m, a convex plate protruding out of the test soil groove is arranged on one side surface of the test soil groove, a plurality of concave surfaces which are concave downwards are arranged on the top surface of the test soil groove, and the depths of the concave surfaces which are concave downwards are different.
3. The test device capable of realizing the constant force loading of the riser composite model pile according to claim 1, wherein the guide rail is an I-shaped steel.
4. The test device capable of realizing the constant force loading of the riser composite model pile according to claim 1, wherein the frame is of a rectangular structure and is arranged on the top surface of the test soil tank, and U-shaped frames which are matched with the guide rails and can slide on the guide rails are arranged at two opposite ends of the frame.
5. The test device capable of realizing the constant force loading of the riser composite model pile according to claim 1, wherein the horizontal loading device comprises: a plurality of loading fixed beams installed on the frame, a U-shaped frame oppositely installed at both ends of the loading fixed beams, a L-shaped frame installed at both ends of the U-shaped frame, wherein a first servo motor is installed under one end of the L-shaped frame, the first servo motor is connected with one end of a first electric cylinder, the other end of the first electric cylinder is sequentially connected with a first sensor and a first loading rod through a height adjusting plate, and the height adjusting plate is vertically installed at the other end of the first electric cylinder; the first sensor and the first loading lever are mounted below the height-adjustment plate.
6. The test device capable of realizing the constant force loading of the riser composite model pile according to claim 1, wherein the vertical loading device comprises: the loading device comprises a plurality of loading fixed beams, U-shaped frames, a second servo motor and a second electric cylinder, wherein the loading fixed beams are arranged on a frame, the U-shaped frames are oppositely arranged at two ends of the loading fixed beams, and the second servo motor and the second electric cylinder are sequentially and vertically arranged at the center positions above the loading fixed beams, wherein a second sensor and a second loading rod are sequentially and vertically arranged at the center positions below the loading fixed beams.
7. The test device capable of realizing the constant force loading of the riser composite model pile according to claim 1, wherein the control device comprises: a touch screen, a vertical servo controller and a horizontal servo controller which are respectively connected with the first servo motor and the second servo motor, wherein, a preset loading force target value is input by the touch screen, a servo motor controlled by a servo controller and horizontally arranged on the servo controller respectively drives a first electric cylinder and a second electric cylinder to move, and force is respectively transmitted to a first loading rod and a second loading rod, the target is loaded, the first sensor and the second sensor feed back the magnitude of the loading force in real time and convert the magnitude into voltage signals to the signal amplifier, the signal amplifier feeds back the amplified voltage value to the vertical servo controller and the horizontal servo controller, the vertical servo controller and the horizontal servo controller read the signal, and adjusting the output signal, controlling the vertical servo controller and the horizontal servo controller to form an electric signal closed loop, and adjusting the loading force to be a constant value in real time.
8. The test device capable of realizing the constant force loading of the riser composite model pile according to claim 1, wherein the reaction frame is a box-shaped frame with the same length as the test soil tank, and a cross-shaped frame structure is arranged on the reaction frame.
9. The test device capable of realizing the constant force loading of the riser composite model pile according to claim 5 or 7, wherein the first sensor and the second sensor are S-shaped tension and compression sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020668378.XU CN212200519U (en) | 2020-04-27 | 2020-04-27 | Test device capable of realizing constant force loading of composite model pile of riser pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020668378.XU CN212200519U (en) | 2020-04-27 | 2020-04-27 | Test device capable of realizing constant force loading of composite model pile of riser pipe |
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| Publication Number | Publication Date |
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| CN212200519U true CN212200519U (en) | 2020-12-22 |
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| CN202020668378.XU Active CN212200519U (en) | 2020-04-27 | 2020-04-27 | Test device capable of realizing constant force loading of composite model pile of riser pipe |
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| CN (1) | CN212200519U (en) |
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