CN113834732A - Soil box loading device for testing external pressure performance of buried pipeline - Google Patents
Soil box loading device for testing external pressure performance of buried pipeline Download PDFInfo
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- CN113834732A CN113834732A CN202111216364.XA CN202111216364A CN113834732A CN 113834732 A CN113834732 A CN 113834732A CN 202111216364 A CN202111216364 A CN 202111216364A CN 113834732 A CN113834732 A CN 113834732A
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- baffle
- soil box
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- external pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0258—Non axial, i.e. the forces not being applied along an axis of symmetry of the specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of pipeline detection application, and particularly relates to a soil box load device for testing external pressure performance of a buried pipeline. Including base and the mount of setting on the base, be provided with pressure driver on the mount, pressure driver's power end sets up towards the base, the loading steel sheet that pressure driver's power end is connected, the below of loading steel sheet is provided with experimental soil box, experimental soil box includes the bottom plate, sets up at the curb plate of bottom plate both sides and sets up the baffle at both ends around the bottom plate, it places the hole to be provided with the pipeline on the baffle, experimental soil box intussuseption is filled with soil body material, the bottom of experimental soil box is provided with gravity measurement mechanism, gravity measurement mechanism sets up on the base. The invention can simulate different burying depths of the pipeline by adjusting the magnitude of the applied load, and realize the accurate test of the external pressure performance of the buried pipeline.
Description
Technical Field
The invention belongs to the technical field of pipeline detection application, and particularly relates to a soil box load device for testing external pressure performance of a buried pipeline.
Background
With the continuous development of cities, the buried depth of the pipeline is continuously increased, and the influence of the soil pressure on the response of the buried pipeline is more prominent. A ring stiffness test method is generally adopted in load tests outside domestic and external pipelines, the adopted loading method is greatly different from the load distribution form of buried pipelines, on one hand, the confining pressure load of a soil body received by the actual buried pipelines cannot be simulated, and on the other hand, the restraint of the lateral soil body of the pipelines on the pipelines cannot be considered. Therefore, the external pressure performance of the pipeline tested by the ring stiffness method is greatly different from the actual external pressure performance of the pipeline.
In the actual operation of the pipeline, the external pressure can deform the pipeline, and the pipeline can even be damaged under the condition of large load. Therefore, how to fully consider the influences of different pipeline materials, different pipeline buried depths and different soil conditions is a key research direction of pipeline manufacturers at present to effectively test the capacity of the pipeline for bearing external loads.
Disclosure of Invention
Aiming at the technical problems of the existing underground pipeline load test, the invention provides the soil box load device for the external pressure performance test of the underground pipeline, which has the advantages of reasonable design, simple structure and convenient processing and can realize accurate test.
In order to achieve the above purpose, the invention adopts the technical scheme that the invention provides a soil box loading device for testing the external pressure performance of a buried pipeline, which comprises a base and a fixing frame arranged on the base, wherein a pressure driver is arranged on the fixing frame, the power end of the pressure driver is arranged towards the base, the power end of the pressure driver is connected with a loading steel plate, a test soil box is arranged below the loading steel plate, the test soil box comprises a bottom plate, side plates arranged at two sides of the bottom plate and baffle plates arranged at the front end and the rear end of the bottom plate, pipeline placing holes are formed in the baffle plates, soil body materials are filled in the test soil box, a gravity measuring mechanism is arranged at the bottom of the test soil box, and the gravity measuring mechanism is arranged on the base.
Preferably, the pressure driver is a hydraulic jack or an electric jack.
Preferably, the loading steel plate is provided with a displacement meter.
Preferably, the inner surfaces of the side plates and the baffle plates are provided with PVC smooth material layers, and the outer sides of the PVC smooth material layers are provided with lubricating oil layers.
Preferably, the baffle plate and the bottom plate are arranged at intervals, a through hole penetrating through the baffle plate up and down is formed in the baffle plate, an auxiliary baffle plate is inserted into the through hole, and the auxiliary baffle plate is used for filling a gap between the baffle plate and the bottom plate.
Preferably, the baffle plate and the bottom plate are arranged at intervals, a through hole penetrating through the baffle plate from top to bottom is formed in the baffle plate, a plurality of inserting plates are inserted into the through hole, the inserting plates are used for filling a gap between the baffle plate and the bottom plate and forming a new pipeline placing hole, and the diameter of the new pipeline placing hole is smaller than that of the pipeline placing hole.
Preferably, the adjacent plugboards are arranged in a plugging manner.
Compared with the prior art, the invention has the advantages and positive effects that,
the invention provides a soil box load device for testing the external pressure performance of a buried pipeline, which can simulate different burying depths of the pipeline by adjusting the magnitude of applied load so as to realize accurate test of the external pressure performance of the buried pipeline; the external pressure performance tests of different soil bodies, pipes and buried pipelines can be realized by replacing soil body materials and pipeline materials; can realize the buried pipeline external pressure capability test of different bore diameter pipelines through changing the pipeline in different apertures, can realize buried pipeline side direction soil body constraint effect's influence research through adjusting soil box size or changing not unidimensional soil box.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an earth box loading device for testing external pressure performance of a buried pipeline provided in example 1;
fig. 2 is a schematic structural diagram of the soil box loading device for testing external pressure performance of a buried pipeline provided in example 2;
fig. 3 is a schematic structural diagram of the soil box loading device for testing external pressure performance of a buried pipeline provided in example 3;
fig. 4 is a schematic structural diagram of the patch panel provided in embodiment 3;
in the above figures, 1, a base; 11. a soil guide groove; 2. a fixed mount; 21. a pressure driver; 22. loading a steel plate; 3. testing a soil box; 31. a base plate; 32. a side plate; 33. a baffle plate; 331. a pipe placement hole; 332. a through hole; 34. an auxiliary baffle; 35. a plugboard; 351. placing a new pipeline hole; 36. a soil guide plate; 4. a gravity measuring mechanism.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
A pressure driver 21 is arranged on the connecting rod, the pressure driver 21 is a hydraulic jack or an electric jack, in the embodiment, the pressure driver 21 is an electric jack, the power end of the pressure driver 21 is arranged towards the base 1, and the power end of the pressure driver 21 is connected with a loading steel plate 22.
The test soil box 3 is arranged below the loading steel plate 22, the test soil box 3 is a structure of an existing common box body, the test soil box 3 comprises a bottom plate 31, side plates 32 arranged on two sides of the bottom plate 31 and baffle plates 33 arranged at the front end and the rear end of the bottom plate 31, a pipeline placing hole 331 is formed in each baffle plate 33, therefore, when in test, a pipeline penetrates through the pipeline placing hole 331 to be arranged, the diameter of the pipeline placing hole 331 is slightly larger than that of the pipeline, and therefore the pipeline can be conveniently placed. Soil body materials are filled in the test soil box 3, a gravity measuring mechanism 4 is arranged at the bottom of the test soil box 3, and the gravity measuring mechanism 4 is arranged on the base 1. The gravity measuring mechanism 4 is an existing gravity sensor and is used for acquiring relevant data of pressure.
In order to acquire the displacement data of the pressing steel plate, a displacement meter is provided on the loading steel plate 22.
In order to avoid the friction between the side plate 32 and the baffle 33 on the soil material and influence the accuracy of the data, in this embodiment, a PVC smooth material layer is disposed on the inner surfaces of the side plate 32 and the baffle 33, and a lubricating oil layer is disposed on the outer side of the PVC smooth material layer. The purpose of setting like this, can neglect the influence of frictional resistance, ensure the accuracy of test.
In specific implementation, different embedding depths of the pipeline are simulated by adjusting the magnitude of the applied load, so that the accurate test of the external pressure performance of the buried pipeline is realized; the external pressure performance tests of different soil bodies, pipes and buried pipelines can be realized by replacing soil body materials and pipeline materials; can realize the buried pipeline external pressure capability test of different bore diameter pipelines through changing the pipeline in different apertures, can realize buried pipeline side direction soil body constraint effect's influence research through adjusting soil box size or changing not unidimensional soil box.
Through the arrangement, the problem of the existing ring stiffness testing method is effectively solved.
As shown in fig. 2, the soil box loading device for testing external pressure performance of a buried pipeline provided in this embodiment is mainly improved on the basis of embodiment 1, and mainly considers that, in the case of replacing soil materials, due to the weight of the box body and the weight of the soil materials, the replacement efficiency of the soil materials is too low.
Therefore, in the present embodiment, the baffle 33 and the bottom plate 31 are spaced apart from each other, and the spacing referred to herein means that a certain gap exists between the baffle 33 and the bottom plate 31, that is, the top surface of the baffle 33 and the side plate 32 are horizontal, but the length of the gap is smaller than that of the side plate 32, in the present embodiment, the length is about two thirds, in order to block the relevant gap, in the present embodiment, a through hole 332 penetrating the baffle 33 up and down is provided on the baffle 33, an auxiliary baffle 34 is inserted into the through hole 332, the auxiliary baffle 34 is used for filling the gap between the baffle 33 and the bottom plate 31 and forms a pipeline placing hole 331 with the baffle 33, so that when the auxiliary baffle 34 is pulled out from the through hole 332, the soil material in the box can be rapidly discharged, thereby facilitating the soil replacement.
In order to avoid the soil material from being scattered, in the embodiment, the bottom plate 31 is provided with the soil guide plate 36, and the base 1 is provided with the soil guide groove 11, so that the soil is scraped in the soil guide groove 11, and then the soil is cleaned to the two sides of the base 1, thereby avoiding the problem of the soil material scattered in the test site.
As shown in fig. 3 and 4, this embodiment aims to solve the problem of replacing the test soil box 3 in the solution provided by embodiment 2, because of the different pipe diameters, the test soil box 3 with different pipe placing holes 331 needs to be replaced, thus, the test cost of enterprises is increased virtually, for this reason, in this embodiment, the baffle 33 and the bottom plate 31 are arranged at intervals, the baffle 33 is provided with through holes 332 penetrating the baffle 33 up and down, and like embodiment 2, the baffle 33 and the bottom plate 31 are arranged at intervals, the interval here means that a certain gap exists between the baffle 33 and the bottom plate 31, namely, the top surface of the baffle 33 and the side plate 32 are horizontal, but the length is smaller than the side plate 32, in this embodiment, the length is about two thirds, in order to block the relevant gap, in this embodiment, the baffle 33 is provided with through holes 332 penetrating the baffle 33 up and down, a plurality of inserting plates 35 are inserted into the through holes 332, the inserting plates 35 are integrally arranged in a rectangular plate shape, a protrusion is arranged on one side of each inserting plate, a groove matched with the protrusion is formed in the other side of each inserting plate, and therefore the adjacent inserting plates 35 can be fixedly inserted together, gaps are formed in some inserting plates 35, the inserting plates 35 are used for filling the gaps between the baffle plates 33 and the bottom plate 31 to form new pipeline placing holes 351, and the diameter of each new pipeline placing hole 351 is smaller than that of the pipeline placing holes 331.
Like this, need not to change whole box, only need to change plugboard 35 can realize that different pipelines place the adjustment of hole 331 to the detection of different pipe diameters is dealt with.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (7)
1. The utility model provides a soil box loading device for burying external pressure capability test of ground pipeline, a serial communication port, including base and the mount of setting on the base, be provided with the pressure driver on the mount, the power end of pressure driver sets up towards the base, the loading steel sheet that the power end of pressure driver is connected, the below of loading steel sheet is provided with experimental soil box, experimental soil box includes the bottom plate, sets up curb plate and the baffle of setting both ends around the bottom plate in the bottom plate both sides, it places the hole to be provided with the pipeline on the baffle, experimental soil box intussuseption is filled with soil body material, the bottom of experimental soil box is provided with gravity measurement mechanism, gravity measurement mechanism sets up on the base.
2. The soil box loading device for external pressure performance test of buried pipeline according to claim 1, wherein said pressure driver is a hydraulic jack or an electric jack.
3. The soil box loading device for external pressure performance test of buried pipelines according to claim 1, wherein the loading steel plate is provided with a displacement meter.
4. The soil box loading device for external pressure performance test of buried pipelines according to claim 1, wherein the inner surfaces of the side plates and the baffles are provided with PVC smooth material layers, and the outer sides of the PVC smooth material layers are provided with lubricating oil layers.
5. The soil box loading device for external pressure performance test of buried pipelines according to claims 1-4, wherein the baffle and the bottom plate are arranged at intervals, the baffle is provided with a through hole which vertically penetrates through the baffle, an auxiliary baffle is inserted into the through hole, and the auxiliary baffle is used for filling a gap between the baffle and the bottom plate.
6. The soil box loading device for external pressure performance test of buried pipelines according to claims 1-4, wherein the baffle and the bottom plate are arranged at intervals, the baffle is provided with a through hole which vertically penetrates through the baffle, a plurality of plugboards are inserted into the through hole, the plugboards are used for filling a gap between the baffle and the bottom plate and forming a new pipeline placing hole, and the diameter of the new pipeline placing hole is smaller than that of the pipeline placing hole.
7. The soil box loading device for external pressure performance test of buried pipelines according to claim 6, wherein adjacent insertion plates are inserted and arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216364.XA CN113834732A (en) | 2021-10-19 | 2021-10-19 | Soil box loading device for testing external pressure performance of buried pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216364.XA CN113834732A (en) | 2021-10-19 | 2021-10-19 | Soil box loading device for testing external pressure performance of buried pipeline |
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| Publication Number | Publication Date |
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| CN113834732A true CN113834732A (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111216364.XA Pending CN113834732A (en) | 2021-10-19 | 2021-10-19 | Soil box loading device for testing external pressure performance of buried pipeline |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115032367A (en) * | 2022-05-30 | 2022-09-09 | 山东东信塑胶科技有限公司 | Test method for simulating collapse disaster of soil body at lower part of buried pipeline |
| CN117288565A (en) * | 2023-10-11 | 2023-12-26 | 广州番禺职业技术学院 | Device and method for measuring soil pressure of limited soil body |
-
2021
- 2021-10-19 CN CN202111216364.XA patent/CN113834732A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115032367A (en) * | 2022-05-30 | 2022-09-09 | 山东东信塑胶科技有限公司 | Test method for simulating collapse disaster of soil body at lower part of buried pipeline |
| CN115032367B (en) * | 2022-05-30 | 2023-09-22 | 山东东信塑胶科技有限公司 | Test method for realizing disaster simulation of collapse of soil body at lower part of buried pipeline |
| CN117288565A (en) * | 2023-10-11 | 2023-12-26 | 广州番禺职业技术学院 | Device and method for measuring soil pressure of limited soil body |
| CN117288565B (en) * | 2023-10-11 | 2024-06-11 | 广州番禺职业技术学院 | Device and method for measuring soil pressure of limited soil body |
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