CN110967263A - Experimental system for subway station stress and displacement and strain at maximum bending moment position - Google Patents
Experimental system for subway station stress and displacement and strain at maximum bending moment position Download PDFInfo
- Publication number
- CN110967263A CN110967263A CN201911324901.5A CN201911324901A CN110967263A CN 110967263 A CN110967263 A CN 110967263A CN 201911324901 A CN201911324901 A CN 201911324901A CN 110967263 A CN110967263 A CN 110967263A
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- Prior art keywords
- subway station
- displacement
- reduced scale
- strain
- displacement meter
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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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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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
- G01N3/06—Special adaptations of indicating or recording 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
- G01N2203/0001—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
- G01N2203/0023—Bending
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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
Abstract
The invention relates to an experimental system for measuring displacement and strain at a maximum bending moment and stressing of a subway station, which comprises a U-shaped groove, wherein the U-shaped groove comprises a horizontal bottom plate and side plates with two vertical sides, and a transverse reaction frame is arranged between the tops of the side plates with two sides; the subway station reduced scale model is placed on a bottom plate of the U-shaped groove; arranging a lateral bearing plate outside the side wall of the subway station reduced scale model, and arranging a transverse jack between the lateral bearing plate and the U-shaped groove side plate to simulate uniformly distributed soil pressure; the top plate of the subway station reduced scale model is provided with a vertical bearing plate, and a vertical jack is arranged between the vertical bearing plate and the reaction frame to simulate the uniformly distributed soil pressure. The invention is different from the traditional loading mode, uses the jack to simulate the soil pressure, optimizes the stress experiment of the subway station model, saves materials and time, and can also well simulate the pressure to measure the displacement and the strain at the maximum bending moment.
Description
Technical Field
The invention relates to a simulation experiment device for a subway station, in particular to an experiment system for measuring displacement and strain at a maximum bending moment position under stress of the subway station.
Background
In a general subway station model experiment, a loading mode is usually to simulate loading by using soil and sand, and although the loading mode can achieve the purpose of loading, the loading mode is time-consuming and consumable.
Disclosure of Invention
The invention aims to provide an experimental system for stress and measurement of displacement and strain at a maximum bending moment of a subway station, which simulates soil pressure based on a jack and overcomes the defects of the prior art.
The technical scheme adopted by the invention is as follows:
experimental system of subway station atress and measurement maximum bending moment department displacement and strain, its characterized in that:
the device comprises a U-shaped groove, the U-shaped groove comprises a horizontal bottom plate and side plates which are vertical at two sides, and a transverse reaction frame is arranged between the tops of the side plates at the two sides;
the subway station reduced scale model is placed on a bottom plate of the U-shaped groove; arranging a lateral bearing plate outside the side wall of the subway station reduced scale model, and arranging a transverse jack between the lateral bearing plate and the U-shaped groove side plate to simulate uniformly distributed soil pressure; the top plate of the subway station reduced scale model is provided with a vertical bearing plate, and a vertical jack is arranged between the vertical bearing plate and the reaction frame to simulate the uniformly distributed soil pressure.
The subway station scale model is of a multilayer structure, and a group of lateral bearing plates and jacks are arranged outside the side wall of each layer.
And lead bags for simulating layer loads are arranged on the middle plate and the bottom plate of the subway station reduced scale model.
The front of the U-shaped groove is provided with a vertical displacement meter fixing frame, a support extends out of the displacement meter fixing frame to the subway station reduced scale model to fix the displacement meter, and the displacement meter is arranged on the bottom surface of a top plate and the bottom surface of a middle plate of the subway station reduced scale model.
The displacement meter fixing frame is in a rod shape, a plurality of supports for fixing the displacement meter are longitudinally arranged on the displacement meter fixing frame, the displacement meter fixing frames are fixed on the displacement meter fixing frame bottom plate side by side, and the displacement meter fixing frame bottom plate is located in front of the U-shaped groove bottom plate.
And strain gauges are arranged on the inner side of the side wall, the outer side of the side wall, the top surface of the top plate and the bottom surface of the top plate of the subway station reduced scale model.
The invention has the following advantages:
the method is different from the traditional loading mode, a model of the subway station is placed in a U-shaped groove, a jack is used for loading, a plate is fixed on the side wall of the model of the subway station, then the jack is used for loading the plate so as to simulate the laterally uniformly distributed soil pressure, and for a top plate, a plate is fixed, and the jack is used for loading the plate so as to simulate the top soil pressure. The displacement meter is arranged at the center of the middle plate and the top plate between the two side walls and the frame columns, the displacement meter is arranged at the center of the top plate of the middle plate between the two frame columns, so that the displacement of the maximum bending moment of the model plate is measured, and the strain gauges are arranged at the positions of the frame columns of the top plate, the maximum bending moment and near the centers of the side walls to measure the strain.
Drawings
FIG. 1 is a view 1 of the present invention.
Fig. 2 is a view 2 structural diagram of the present invention.
Fig. 3 is a view 3 structural diagram of the present invention.
Fig. 4 is a view 4 structural diagram of the present invention.
In the figure, 1-subway station reduced scale model, 2-8-No. one-seven jacks, 9-U-shaped grooves, 10-reaction frames, 11-13-No. one-three lateral bearing plates, 14-displacement meter fixing frames, 15-vertical bearing plates, 16-24-No. one-nine displacement meters, 25-displacement meter fixing frame bottom plates, 26-34-No. one-nine lead bags and 35-41-No. one-seven strain gauges.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The invention relates to an experimental system for stress of a subway station and measurement of displacement and strain at a maximum bending moment, which comprises a U-shaped groove 9, wherein the U-shaped groove 9 comprises a horizontal bottom plate and side plates with two vertical sides, and a transverse reaction frame 10 is arranged between the tops of the side plates with two sides; the subway station reduced scale model 1 is placed on a bottom plate of the U-shaped groove 9; arranging a lateral bearing plate outside the side wall of the subway station reduced scale model 1, and arranging a transverse jack between the lateral bearing plate and the side plate of the U-shaped groove 9 to simulate the uniformly distributed soil pressure; the top plate of the subway station reduced scale model 1 is provided with a vertical bearing plate 15, and a vertical jack is arranged between the vertical bearing plate 15 and the reaction frame 10 to simulate the uniformly distributed soil pressure.
The subway station reduced scale model 1 is of a multilayer structure, and a group of lateral bearing plates and jacks are arranged outside the side wall of each layer.
And lead bags for simulating layer loads are arranged on the middle plate and the bottom plate of the subway station reduced scale model 1.
A vertical displacement meter fixing frame 14 is arranged in front of the U-shaped groove 9, a support extends out of the displacement meter fixing frame 14 to the subway station reduced scale model 1 to fix the displacement meter, and the displacement meter is arranged on the bottom surface of a top plate and the bottom surface of a middle plate of the subway station reduced scale model 1. The displacement meter fixing frame 14 is in a rod shape, a plurality of supports for fixing the displacement meter are longitudinally arranged on the displacement meter fixing frame 14, the displacement meter fixing frame 14 is fixed on a displacement meter fixing frame bottom plate 25 side by side, and the displacement meter fixing frame bottom plate 25 is positioned in front of the bottom plate of the U-shaped groove 9.
The inner side of the side wall, the outer side of the side wall, the top surface of the top plate and the bottom surface of the top plate of the subway station reduced scale model 1 are all provided with strain gauges.
Referring to fig. 1-4, firstly, a subway station reduced scale model 1 is placed in a U-shaped groove 9, lateral bearing plates for bearing the load of a jack are arranged on the side walls of two sides, a vertical bearing plate 15 is arranged on a top plate, the jack acts on the central position of the lateral bearing plates to simulate uniformly distributed soil pressure, the jack also acts on the central position of the vertical bearing plate 15 above the top plate to simulate uniformly distributed soil pressure, and a reaction frame 10 is used for restraining; and arranging a displacement meter, fixing the displacement meter on a bottom plate by using a displacement meter fixing frame, and placing a lead bag to simulate the load of each layer of the station.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (6)
1. Experimental system of subway station atress and measurement maximum bending moment department displacement and strain, its characterized in that:
the device comprises a U-shaped groove (9), wherein the U-shaped groove (9) comprises a horizontal bottom plate and side plates which are vertical on two sides, and a transverse reaction frame (10) is arranged between the tops of the side plates on the two sides;
the subway station reduced scale model (1) is placed on a bottom plate of the U-shaped groove (9); lateral bearing plates are arranged outside the side walls of the subway station reduced scale model (1), and transverse jacks are arranged between the lateral bearing plates and the side plates of the U-shaped groove (9) to simulate the uniformly distributed soil pressure; vertical bearing plates (15) are arranged on the top plate of the subway station reduced scale model (1), and vertical jacks are arranged between the vertical bearing plates (15) and the reaction frame (10) to simulate uniformly distributed soil pressure.
2. The experiment system for measuring displacement and strain at maximum bending moment under stress and according to claim 1, which is characterized in that:
the subway station reduced scale model (1) is of a multilayer structure, and a group of lateral bearing plates and jacks are arranged outside the side wall of each layer.
3. The experiment system for measuring the displacement and the strain at the maximum bending moment and the stress of the subway station as claimed in claim 2, wherein:
lead bags simulating layer loads are arranged on the middle plate and the bottom plate of the subway station reduced scale model (1).
4. The experiment system for measuring the displacement and the strain at the maximum bending moment and the stress of the subway station as claimed in claim 3, wherein:
a vertical displacement meter fixing frame (14) is arranged in front of the U-shaped groove (9), a support extends out of the displacement meter fixing frame (14) to the subway station reduced scale model (1) to fix the displacement meter, and the displacement meter is arranged on the bottom surface of a top plate and the bottom surface of a middle plate of the subway station reduced scale model (1).
5. The experiment system for measuring the displacement and the strain at the maximum bending moment and the stress of the subway station as claimed in claim 4, wherein:
the displacement meter fixing frame (14) is in a rod shape, a plurality of supports for fixing the displacement meter are longitudinally arranged on the displacement meter fixing frame (14), the displacement meter fixing frame fixing frames (14) are fixed on a displacement meter fixing frame bottom plate (25) side by side, and the displacement meter fixing frame bottom plate (25) is positioned in front of the bottom plate of the U-shaped groove (9).
6. The experiment system for measuring the displacement and the strain at the maximum bending moment and the stress of the subway station as claimed in claim 5, wherein:
the inner side of the side wall, the outer side of the side wall, the top surface of the top plate and the bottom surface of the top plate of the subway station reduced scale model (1) are respectively provided with a strain gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911324901.5A CN110967263A (en) | 2019-12-20 | 2019-12-20 | Experimental system for subway station stress and displacement and strain at maximum bending moment position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911324901.5A CN110967263A (en) | 2019-12-20 | 2019-12-20 | Experimental system for subway station stress and displacement and strain at maximum bending moment position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110967263A true CN110967263A (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911324901.5A Pending CN110967263A (en) | 2019-12-20 | 2019-12-20 | Experimental system for subway station stress and displacement and strain at maximum bending moment position |
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| CN (1) | CN110967263A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678783A (en) * | 2020-05-15 | 2020-09-18 | 南京工程学院 | Model and method for measuring upper load transfer coefficient of urban wall civil air defense |
| CN114397190A (en) * | 2021-12-23 | 2022-04-26 | 东南大学 | Scale-down test device and method for simulating containment frustum ultimate bearing capacity |
-
2019
- 2019-12-20 CN CN201911324901.5A patent/CN110967263A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678783A (en) * | 2020-05-15 | 2020-09-18 | 南京工程学院 | Model and method for measuring upper load transfer coefficient of urban wall civil air defense |
| CN114397190A (en) * | 2021-12-23 | 2022-04-26 | 东南大学 | Scale-down test device and method for simulating containment frustum ultimate bearing capacity |
| CN114397190B (en) * | 2021-12-23 | 2024-01-02 | 东南大学 | Reduced scale test device and method for simulating ultimate bearing capacity of truncated cone of containment |
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