CN216948460U - Model test device for multi-barrel foundation penetration - Google Patents
Model test device for multi-barrel foundation penetration Download PDFInfo
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- CN216948460U CN216948460U CN202121322231.6U CN202121322231U CN216948460U CN 216948460 U CN216948460 U CN 216948460U CN 202121322231 U CN202121322231 U CN 202121322231U CN 216948460 U CN216948460 U CN 216948460U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The utility model discloses a model test device for penetration of a multi-barrel foundation, which comprises: a test chamber with an open top and filled with soil and water for test; a loading reaction frame spanning over the test chamber; a servo electric cylinder fixedly arranged on the loading reaction frame, wherein a push rod of the servo electric cylinder is vertically downward; a multi-barrel foundation arranged in the test box; a wire-drawing type displacement sensor arranged beside the servo electric cylinder, wherein a steel wire rope of the wire-drawing type displacement sensor vertically stretches downwards and is connected with the loading platform; and four water storage barrels. The model test device for the penetration of the multi-barrel foundation can simulate the whole processes of self-weight penetration and negative pressure penetration of the multi-barrel foundation, can be used for researching the penetration technology and the construction process of the multi-barrel foundation and provides a basis for engineering construction and structural application.
Description
Technical Field
The utility model relates to the technical field of engineering, in particular to a model test device for penetration of a multi-barrel foundation.
Background
The bucket foundation has wide adaptability to water depth and geological conditions, is quick to construct and has low requirements on construction equipment, so that the bucket foundation is widely applied to the fields of offshore oil platforms and offshore wind power at home and abroad. In order to improve the bearing capacity of the foundation, a multi-barrel foundation type is often adopted in engineering, the structural type is limited in application in the offshore wind power field of China, the penetration technology and the construction process of the multi-barrel foundation are not mature, and the large multi-barrel foundation structure used in the offshore wind power field of China is mostly constructed by experienced foreign companies such as entrusted SPT and the like, so that in order to master the core technology and promote the relevant structural performance and the construction technology progress of China, deep research needs to be carried out. The multi-barrel foundation penetration relates to the interaction problem of a complex structure and a soil body, and the development of a model test is the most intuitive and effective way in the overall research method.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and provides a model test device for penetration of a multi-barrel foundation, which can simulate the whole process of self-weight penetration and negative pressure penetration of the multi-barrel foundation and provide a basis for calculation of penetration resistance and construction control of the multi-barrel foundation.
The purpose of the utility model is realized as follows:
the utility model relates to a model test device for penetration of a multi-barrel foundation, which comprises:
a test chamber having an open top and filled with soil and water for testing;
a loading reaction frame spanning over the test chamber;
a servo electric cylinder fixedly arranged on the loading reaction frame, wherein a push rod of the servo electric cylinder is vertically downward;
the multi-barrel foundation comprises four negative pressure barrels arranged in an array mode, a jacket with the lower end welded with the centers of the tops of the four negative pressure barrels, and a loading platform welded to the top of the jacket and used for hoisting the servo electric cylinder, wherein two pressure sensors are symmetrically arranged at the bottom of each negative pressure barrel along the axis of the barrel body;
a wire-drawing type displacement sensor arranged beside the servo electric cylinder, wherein a steel wire rope of the wire-drawing type displacement sensor vertically stretches downwards and is connected with the loading platform; and
four water storage buckets that are used for holding the interior water extraction of follow negative pressure bucket, every water storage bucket through its top sealing connection's a drinking-water pipeline rather than the negative pressure bucket intercommunication that corresponds, every water storage bucket all arranges a platform scale in, every water storage bucket corresponds and sets up a negative pressure pump and communicates with water storage bucket through an aspiration line.
The loading reaction frame in the model test device for the multi-barrel foundation penetration is a door-shaped frame structure formed by three I-shaped steels;
the pressure sensor is arranged at the bottom of the multi-barrel foundation along the diagonal direction of the loading platform;
the top of each negative pressure barrel in the model test device for multi-barrel foundation penetration is provided with a reserved hole for connecting a water pumping pipeline.
The loading plate in the model test device for multi-barrel foundation penetration is rectangular plate-shaped, and the pressure sensors at the bottoms of the four negative pressure barrels are arranged along the direction of the extension line of the diagonal line of the loading plate.
Each water storage barrel in the model test device for multi-barrel foundation penetration is also provided with a negative pressure meter.
The use method of the model test device for multi-barrel foundation penetration comprises the following steps:
(1) preparation of the test: respectively connecting and sealing the water pumping pipelines with corresponding negative pressure barrels, fixing the multi-barrel foundation at the lower end of the servo electric cylinder, checking the verticality and the installation position of the servo electric cylinder, and checking the states of the servo electric cylinder, the stay wire type displacement sensor, the negative pressure pump and the platform scale;
(2) dead weight penetration test: controlling a push rod of the servo electric cylinder to slowly descend, gradually putting the multi-barrel foundation into water, continuously measuring the sinking displacement of the multi-barrel foundation, gradually reducing the load of the servo electric cylinder after the multi-barrel foundation enters the mud surface of the test soil, removing the connection between the servo electric cylinder and the multi-barrel foundation when the load of the servo electric cylinder is zero and the multi-barrel foundation enters the mud surface for a certain depth and a sealing condition is formed in the negative pressure barrel, adjusting the multi-barrel foundation to keep a vertical posture, and finishing the self-weight sinking penetration of the multi-barrel foundation;
(3) negative pressure penetration test: the negative pressure pump is communicated with an air suction pipeline between the negative pressure pump and the water storage barrel and a water pumping pipeline between the water storage barrel and the negative pressure barrel, the negative pressure pump is started to reduce air pressure in the water storage barrel, water in the negative pressure barrel is pumped out by utilizing pressure difference between two sides of the water pumping pipeline, negative pressure penetration of a multi-barrel foundation is achieved, and a penetration test is completed after a soil body inside the multi-barrel foundation is contacted with a top cover of the negative pressure barrel.
A method for analyzing the variation law of penetration resistance of a multi-barrel foundation in a using method of a multi-barrel foundation penetration model test device comprises the following steps:
acquiring a multi-bucket foundation penetration resistance change rule through load change of a servo electric cylinder, acquiring a multi-bucket foundation end resistance change rule through a pressure sensor at the bottom of the multi-bucket foundation, wherein the difference between the multi-bucket foundation penetration resistance and the end resistance is a lateral resistance change rule in the multi-bucket foundation penetration process;
the method for analyzing the relation between the pumping speed and the penetration displacement of the multi-bucket foundation comprises the following steps: the change of the pumping speed in the multi-barrel foundation penetration process is obtained through the data record and conversion of the platform balance, the penetration displacement of the multi-barrel foundation can be obtained through the stay wire type displacement sensor, and the relationship between the pumping speed and the penetration displacement can be obtained through the combination of the stay wire type displacement sensor and the stay wire type displacement sensor.
The model test device for the multi-bucket foundation penetration can simulate the whole process of the multi-bucket foundation self-weight penetration and negative pressure penetration, can be used for researching the multi-bucket foundation penetration technology and construction process, and provides a basis for engineering construction and structural application.
Drawings
FIG. 1 is a schematic structural diagram of a model test device for multi-barrel foundation penetration (without a water storage barrel, a platform scale and a negative pressure pump) according to the present invention;
FIG. 2 is a cross-sectional view (taken across the load reaction frame) of the test apparatus of the present invention;
FIG. 3 is a schematic structural view of a multi-bucket foundation of the present invention;
FIG. 4 is a bottom view of the multi-bucket foundation of the present invention;
FIG. 5 is a view showing a state of use of the test apparatus of the present invention.
Detailed Description
The utility model will be further explained with reference to the drawings.
Referring to fig. 1 to 5, it is shown that a model testing apparatus for multi-barrel foundation penetration according to the present invention includes:
a test box 1 with an opening at the top, wherein the bottom layer inside the test box 1 is test soil 11 and water 12 flowing over the test soil 11;
a loading reaction frame 2 crossing over the test box 1, wherein in the embodiment, the loading reaction frame 2 is a door-shaped frame structure formed by three I-shaped steels;
a servo electric cylinder 3 fixedly arranged on the loading reaction frame 2, wherein a push rod of the servo electric cylinder 3 vertically acts downwards;
the multi-barrel foundation 4 is arranged in the test box 1, and the multi-barrel foundation 4 comprises four negative pressure barrels 41 which are arranged in an array mode, a jacket 42 of which the lower end is welded with the centers of the tops of the four negative pressure barrels 41, and a loading platform 43 which is welded on the top of the jacket 42 and used for hoisting the servo electric cylinder 3; the top of each negative pressure barrel 41 is provided with a reserved hole 44 for installing a water pumping pipeline; two pressure sensors 45 are arranged at the bottom of each negative pressure barrel 41 along the diagonal direction of the loading platform 43;
a pull-wire type displacement sensor 5 arranged beside the servo electric cylinder 3, wherein a steel wire rope of the pull-wire type displacement sensor 5 vertically stretches downwards and is connected with a loading platform 43; and
each water storage bucket 6 is communicated with a preformed hole 44 at the top of a corresponding negative pressure bucket 41 through a water pumping pipeline 61 (the water pumping pipeline 61 rotates towards the upright post of the loading reaction frame 2 by 90 degrees in fig. 2) hermetically connected with the top of each water storage bucket 6, each water storage bucket 6 is arranged on a platform scale 62, and each water storage bucket 6 is also provided with a negative pressure meter 63; a negative pressure pump 64 is correspondingly arranged on each water storage barrel 6 and is communicated with the water storage barrel 6 through an air suction pipeline 65.
The utility model discloses a using method of a model test device for penetration of a multi-barrel foundation, which comprises the following steps:
(1) preparation of the test: connecting and sealing a water pumping pipeline 61 with the reserved holes 44 at the tops of the four negative pressure barrels 41, fixing the multi-barrel foundation 4 at the lower end of the servo electric cylinder 3, checking the verticality and the installation position of the servo electric cylinder, and checking the states of the servo electric cylinder 3, the stay wire type displacement sensor 5, the negative pressure pump 64, the platform scale 62 and the negative pressure meter 63;
(2) dead weight penetration test: controlling a push rod of the servo electric cylinder 3 to slowly descend, gradually putting the multi-barrel foundation 4 under water, continuously measuring the sinking displacement of the multi-barrel foundation 4, gradually reducing the load of the servo electric cylinder 3 after the multi-barrel foundation 4 enters the mud surface of the test soil 11, removing the connection between the servo electric cylinder 3 and the multi-barrel foundation 4 when the load of the servo electric cylinder 3 is zero and the multi-barrel foundation 4 enters the mud surface for a certain depth and forming a sealing condition in the negative pressure barrel 41, adjusting the multi-barrel foundation 4 to keep a vertical posture, and finishing the dead weight sinking penetration of the multi-barrel foundation 4;
(3) negative pressure penetration test: the suction pipeline 65 between the negative pressure pump 64 and the water storage barrel 6 and the water pumping pipeline 61 between the water storage barrel 6 and the negative pressure barrel 41 are communicated, the negative pressure pump 64 is opened to reduce the air pressure in the water storage barrel 6, the water in the negative pressure barrel 41 is pumped out by utilizing the pressure difference between the two sides of the water pumping pipeline 61, the negative pressure penetration of the multi-barrel foundation 4 is realized, and the penetration test is finished after the soil body in the multi-barrel foundation 4 is contacted with the top cover of the negative pressure barrel 41.
(4) Analysis of test data:
analyzing the change rule of penetration resistance of the multi-barrel foundation: acquiring a multi-barrel foundation 4 penetration resistance change rule through load change of the servo electric cylinder 3, acquiring a multi-barrel foundation 4 end resistance change rule through a pressure sensor 45 at the bottom of the multi-barrel foundation 4, and acquiring a multi-barrel foundation 4 end resistance change rule, wherein the difference between multi-barrel foundation penetration resistance and end resistance is a multi-barrel foundation 4 penetration process side resistance change rule;
and (3) analyzing the relation between the pumping speed and the penetration displacement of the multi-bucket foundation 4: the change of the pumping speed in the process of sinking and penetrating the multi-barrel foundation 4 is obtained through the data recording and conversion of the platform balance 62, the sinking and penetrating displacement of the multi-barrel foundation 4 can be obtained through the stay wire type displacement sensor 5, and the relationship between the pumping speed and the sinking and penetrating displacement can be obtained through the combination of the stay wire type displacement sensor and the multi-barrel foundation 4.
The multi-bucket foundation penetration model test device and the use method can truly simulate the whole process of self-weight penetration and negative pressure penetration of the multi-bucket foundation, research the multi-bucket foundation construction process and the construction control technology, and provide a basis for engineering construction and structural popularization and application.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore all equivalent technical solutions should also fall into the scope of the present invention, and should be defined by the claims.
Claims (5)
1. The utility model provides a model test device that is used for many barrels of basis to sink to pass through which characterized in that, it includes:
a test chamber having an open top and filled with soil and water for testing;
a loading reaction frame spanning above the test chamber;
a servo electric cylinder fixedly arranged on the loading reaction frame, wherein a push rod of the servo electric cylinder is vertically downward;
the multi-barrel foundation is arranged in the test box and comprises four negative pressure barrels arranged in an array mode, a jacket with the lower end welded with the centers of the tops of the four negative pressure barrels and a loading platform welded to the top of the jacket and used for hoisting the servo electric cylinder, and two pressure sensors are symmetrically arranged at the bottom of each negative pressure barrel along the axis of the barrel body;
a wire-drawing type displacement sensor arranged beside the servo electric cylinder, wherein a steel wire rope of the wire-drawing type displacement sensor vertically stretches downwards and is connected with the loading platform; and
the four water storage barrels are used for containing water pumped from the negative pressure barrel, each water storage barrel is communicated with the corresponding negative pressure barrel through a water pumping pipeline in sealed connection with the top of the water storage barrel, each water storage barrel is arranged on a platform scale, and each water storage barrel is correspondingly provided with a negative pressure pump and is communicated with the water storage barrel through a gas pumping pipeline.
2. The model test device for multi-barrel foundation penetration, according to claim 1, wherein the loading reaction frame is a portal frame structure formed by three i-beams.
3. The apparatus of claim 1, wherein each of the negative pressure barrels has a predetermined hole on a top thereof for connecting the water pumping line.
4. The model test device for multi-bucket foundation penetration, according to claim 1, wherein each water storage bucket is further provided with a negative pressure gauge.
5. The model test device for multi-barrel foundation penetration, according to claim 1, wherein two pressure sensors are arranged at the bottom of each negative pressure barrel along the diagonal direction of the loading platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121322231.6U CN216948460U (en) | 2021-06-15 | 2021-06-15 | Model test device for multi-barrel foundation penetration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121322231.6U CN216948460U (en) | 2021-06-15 | 2021-06-15 | Model test device for multi-barrel foundation penetration |
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| Publication Number | Publication Date |
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| CN216948460U true CN216948460U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121322231.6U Active CN216948460U (en) | 2021-06-15 | 2021-06-15 | Model test device for multi-barrel foundation penetration |
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2021
- 2021-06-15 CN CN202121322231.6U patent/CN216948460U/en active Active
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