CN112763314B - Indoor physical model device for reinforced earth retaining wall roadbed - Google Patents
Indoor physical model device for reinforced earth retaining wall roadbed Download PDFInfo
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- CN112763314B CN112763314B CN202011524863.0A CN202011524863A CN112763314B CN 112763314 B CN112763314 B CN 112763314B CN 202011524863 A CN202011524863 A CN 202011524863A CN 112763314 B CN112763314 B CN 112763314B
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
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- 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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Abstract
The invention discloses an indoor physical model device for a reinforced earth retaining wall roadbed, which comprises a model base plate and side-limit retaining walls fixedly connected with two sides of the model base plate, wherein multiple layers of roadbed packing layers are arranged between the side-limit retaining walls, geogrids are arranged among the multiple layers of roadbed packing layers, ballast layers are paved above the multiple layers of roadbed packing layers, a track model is connected above the ballast layers, the upper end of each side-limit retaining wall is fixedly connected with a model loading device, and the indoor physical model device also comprises blocking parts connected with two open ends of each side-limit retaining wall. Therefore, the indoor model device can be used for indoor simulation research of novel roadbeds.
Description
Technical Field
The invention relates to the technical field of reinforced retaining walls, in particular to an indoor physical model device for a reinforced retaining wall roadbed.
Background
Since the 20 th century and the 70 th era, reinforced earth technology is introduced into China, and the reinforced earth technology is widely applied to various engineering fields. In particular, geogrid reinforced earth retaining walls are widely applied to the fields of railways, highways, municipal works, airports and the like based on the characteristics of economy, stability, convenience, good adaptability, attractive appearance and the like and good engineering characteristics. Geogrid reinforced earth retaining wall uses geogrid as the muscle material, and the effect of inlaying to soil through its distinctive mesh hole provides resistance to plucking with the interlock effect, makes stable in structure.
The good working state of the reinforcement body is the safety and stability premise of the geogrid reinforced retaining wall structure, if the calculation stress is wrong, potential safety hazards can be brought after the geogrid reinforced retaining wall structure is put into use, and a model device for detecting and realizing the reinforced retaining wall roadbed does not exist at present, so that an indoor physical model device for the reinforced retaining wall roadbed is provided.
Disclosure of Invention
The invention aims to provide an indoor physical model device for a reinforced retaining wall roadbed, which aims to solve the problem of how to detect the reinforced retaining wall roadbed before the reinforced retaining wall roadbed is put into use.
In order to achieve the purpose, the invention provides the following technical scheme:
an indoor physical model device for a reinforced retaining wall roadbed comprises a model bottom plate and side-limit retaining walls fixedly connected to two sides of the model bottom plate, the top of the side-limit retaining wall is fixedly connected with a box body, the bottom of the box body is provided with a rainfall system and a drying system, the side walls of the side-limit retaining walls are connected with a dehumidification system, a plurality of layers of roadbed packing layers are arranged among the side-limit retaining walls, geogrids are arranged among the plurality of layers of roadbed packing layers, ballast layers are laid above the plurality of layers of roadbed packing layers, a track model is connected above the ballast layer, the upper end of the side-limit retaining wall is fixedly connected with a model loading device, and the side-limit retaining wall further comprises a blocking component connected between the side-limit retaining wall and the roadbed packing layer, two open ends of side limit barricade are connected with spacing portion, still including being used for carrying out the inlet tube of water delivery and being used for carrying out the drain pipe of drainage to multilayer roadbed packing layer.
Preferably, the blocking member comprises a gravel pack located between the side retaining wall and the roadbed packing layer.
Preferably, spacing portion includes two check steelframes, two the check steelframe is connected respectively two open ends of limit barricade, check steelframe internally mounted toughened glass, two be connected with the steel pull rod between the check steelframe, the steel pull rod is a plurality of, and is located a plurality of between the geogrid, seted up on the toughened glass and be convenient for the through-hole that the steel pull rod runs through.
Preferably, the two ends of the steel pull rod penetrate through the toughened glass and the lattice steel frame, the nut is in threaded connection with the steel pull rod, and the gasket is sleeved on the steel pull rod and located between the nut and the lattice steel frame.
Preferably, the roadbed filler layer is three layers, and the number of the geogrids is four.
Preferably, the roadbed packing layer is made of one or more of coal slag, blast furnace slag, steel slag and carbide slag.
Preferably, the ballast layer is made of coarse gravel or broken stone.
Preferably, the rainfall system comprises a first support fixedly connected to the bottom of the box body, the bottom of the first support is connected with an atomizing nozzle, the box body is provided with a water supply pipe, and the water supply pipe is connected with an electronic flowmeter.
Preferably, the drying system comprises a second support fixedly connected to the bottom of the box body, a bathroom heater lamp is mounted at the bottom of the second support, and a temperature control switch electrically connected with the bathroom heater lamp is connected to the outer wall of the box body.
Preferably, railway ballast layer top fixedly connected with fixed plate, fixed plate bottom fixedly connected with electrolyte case, electrolyte bottom fixedly connected with battery case, electrolyte bottom is equipped with the opening, the sealed sliding connection of opening part has the piston, piston bottom fixedly connected with wire drawing, the wire drawing is kept away from the one end of piston is passed battery case and downwardly extending, wire drawing lower extreme fixedly connected with traction block, traction block is used for installing in the road bed filler layer, battery case top fixedly connected with positive and negative electrode, install signal transmission device on the fixed plate, positive and negative electrode with signal transmission device electric connection, battery bottom fixedly connected with cardboard, the disposable card strip of fixedly connected with on the cardboard, the card strip with wire drawing fixed connection. .
Compared with the prior art, the invention has the beneficial effects that: the method comprises the steps of prefabricating a gravel bag, compacting a roadbed packing layer, paving a geogrid, applying prestress, arranging steel plates and steel pull rods and paving a ballast layer, starting a model loading device after the model is installed, and developing a simulation test of roadbed stability and durability under different heavy load working conditions.
Drawings
FIG. 1 is a first schematic structural diagram of an indoor physical model device for a reinforced retaining wall roadbed according to the present invention;
FIG. 2 is a second schematic structural view of an indoor physical model apparatus for a reinforced retaining wall subgrade according to the present invention;
FIG. 3 is a schematic view showing a structure of part A of FIG. 2 of an indoor physical model apparatus for a reinforced retaining wall subgrade according to the present invention;
FIG. 4 is a schematic view showing a structure of a portion B of FIG. 1 of an indoor physical model apparatus for a reinforced retaining wall subgrade according to the present invention;
FIG. 5 is a schematic view showing a structure of a portion C of FIG. 1 of an indoor physical model apparatus for a reinforced retaining wall subgrade according to the present invention;
fig. 6 is a schematic structural view of a portion D of fig. 5 of an indoor physical model apparatus for a reinforced retaining wall subgrade according to the present invention.
In the figure: 1. a model base plate; 101. a lateral-limiting retaining wall; 2. a lattice steel frame; 21. a steel tie rod; 22. a nut; 23. a gasket; 24. tempering the glass; 3. a roadbed packing layer; 4. a geogrid; 5. a track model; 6. a model loading device; 7. a railway ballast layer; 8. a gravel bag; 9. a box body; 10. a first bracket; 11. an atomizing spray head; 12. a water supply pipe; 13. a second bracket; 14. a bathroom warmer warm light; 15. an electronic flow meter; 16. a temperature control switch; 17. a dehumidification system; 18. a water inlet pipe; 19. a drain pipe; 25. a fixing plate; 26. a signal transmitting device; 27. an electrolyte tank; 28. a piston; 29. drawing wires; 30. a battery case; 31. positive and negative electrodes; 32. clamping a plate; 33. clamping the strip; 34. and a traction block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, an embodiment of the present invention is shown: an indoor physical model device for a reinforced earth retaining wall roadbed comprises a model base plate 1 and side-limit retaining walls 101 fixedly connected to two sides of the model base plate 1, wherein the tops of the side-limit retaining walls 101 are fixedly connected with a box body 9, the bottom of the box body 9 is provided with a rainfall system and a drying system, the side walls of the side-limit retaining walls 101 are connected with a dehumidification system 17, a plurality of layers of roadbed filler layers 3 are arranged between the side-limit retaining walls 101, geogrids 4 are arranged between the layers of roadbed filler layers 3, ballast layers 7 are paved above the layers of roadbed filler layers 3, a track model 5 is connected above the ballast layers 7, a model loading device 6 is fixedly connected to the upper ends of the side-limit retaining walls 101, a blocking part connected between the side-limit retaining walls 101 and the roadbed filler layers 3 is further included, two open ends of the side-limit retaining walls 101 are connected with limiting parts, a water inlet pipe 18 for conveying water to the layers of the roadbed filler layers 3 and a water outlet pipe 19 for draining the layers of the roadbed filler layers 3 are further included, the ballast layer 7 is made of coarse gravel or broken stone, and the stone is special-grade granite. Be used for dispersing train and rail weight on the road bed, can reduce vibrations and the noise that the train brought when through, consequently detect according to the in-service use, through increasing rainfall system and drying system and then can simulate under the different rainfall conditions and the novel road bed mechanical properties under the wet cycle condition futilely, through increasing dehumidification system 17, set for its relative humidity when starting and stopping at whole in-process, with the control of humidity in the model case in certain extent, be used for simulating environment relative humidity, inlet tube 18 and drain pipe 19 through increasing the model, and then simulate the lift of ground water level, simulate the novel road bed mechanical properties of ground water level lift in-process in the real environment.
Referring to fig. 1-4, an embodiment of the present invention is shown: the blocking means comprises a gravel pack 8, and the gravel pack 8 is located between the side retaining wall 101 and the roadbed packing layer 3.
Referring to fig. 1-4, an embodiment of the present invention is shown: spacing portion includes two check steelframes 2, two open ends at side limit barricade 101 are connected respectively to two check steelframes 2, 2 internally mounted toughened glass 24 of check steelframe, be connected with steel pull rod 21 between two check steelframes 2, steel pull rod 21 is a plurality of, and be located between a plurality of geogrids 4, set up the through-hole that steel pull rod 21 of being convenient for runs through on the toughened glass 24, toughened glass 24 and check steelframe 2 and threaded connection have a nut 22 are passed at steel pull rod 21 both ends, gasket 23 has been cup jointed on the steel pull rod 21, gasket 23 is located between nut 22 and the check steelframe 2, the benefit that this embodiment played lies in the change of conveniently observing the water level and the infiltration of rainfall, respond to the influence of road bed mechanical properties with the simulated environment.
Referring to fig. 1-4, an embodiment of the present invention is shown: the roadbed packing layer 3 is three layers, the geogrids 4 are four layers, and preferably, the roadbed packing layer 3 is made of one or more of coal cinder, blast furnace slag, steel slag and carbide slag.
Referring to fig. 1-4, one embodiment of the present invention provides a rain system: it includes first support 10 of fixed connection in the bottom of box 9, and first support 10 bottom is connected with atomizer 11, is equipped with delivery pipe 12 on the box 9, is connected with electronic flowmeter 15 on the delivery pipe 12, and it should be noted that, electronic flowmeter 15 and the connected mode with delivery pipe 12 are prior art, do not do too much to describe here.
Referring to fig. 1-4, a drying system according to an embodiment of the present invention includes: it includes second support 13 of fixed connection in the bottom of box 9, and second support 13 bottom is installed bathroom heater 14 and the box 9 outer wall of the portion of installing is connected with the temperature control switch 16 that links to each other with bathroom heater 14 electrical property, and what need the description is bathroom heater 14 and temperature control switch 16 and are prior art, do not do too much to describe here.
The top of the ballast layer 7 is fixedly connected with a fixing plate 25, the bottom of the fixing plate 25 is fixedly connected with an electrolyte box 27, the bottom of the electrolyte box 27 is fixedly connected with a battery box 30, the bottom of the electrolyte box 27 is provided with an opening, the opening is hermetically and slidably connected with a piston 28, the bottom of the piston 28 is fixedly connected with a wire drawing 29, one end of the wire drawing 29, far away from the piston 28, penetrates through the battery box 30 and extends downwards, the lower end of the wire drawing 29 is fixedly connected with a traction block 34, the traction block 34 is used for being installed in the roadbed filler layer 3, the top of the battery box 30 is fixedly connected with a positive electrode 31 and a negative electrode 31, a signal sending device 26 is installed on the fixing plate 25, the positive electrode 31 and the negative electrode 31 are electrically connected with the signal sending device 26, the bottom of the battery box 30 is fixedly connected with a clamping plate 32, and a disposable clamping strip 33 is fixedly connected on the clamping plate 32, the clamping strip 33 is fixedly connected with the drawing wire 29, the embodiment mainly detects whether the roadbed filler layer 3 is settled, before the device is used, the device is arranged at the top of the ballast layer 7, the electrolyte tank 27 of the device is arranged in the ballast layer 7, the traction block 34 is arranged in the roadbed filler layer 3, the disposable clamping strip 33 is removed, the fixing of the drawing wire 29 is released, along with a simulation test, when the roadbed filler layer 3 is settled, the traction block 34 is driven to move downwards, the drawing wire 29 pulls the piston 28 to move downwards, then the electrolyte in the electrolyte tank 27 flows into the battery box 30 to activate the battery, and then the positive electrode and the negative electrode 31 supply power to the signal sending device 26 to send signals, so that the roadbed filler layer 3 is known to be settled, and it needs to be stated that the drawing wire 29 penetrates through the battery box 30, a sealing ring can be arranged at the connection part, or not be arranged, the diameter of the drawing wire 29 is small, so that the loss of the electrolyte can be controlled, the signal sending device 26 and the electrolyte activated battery are both common structures in the prior art, and the invention only applies the existing principle to the embodiment, so that the technical effect of roadbed monitoring is realized.
In the invention, the lateral-limiting retaining wall 101 can be understood as that the lateral-limiting retaining wall 101 is prefabricated on a certain field for limiting the lateral displacement of the model test in order to develop the model test conveniently; the gravel bag 8 can be understood as filling gravel particles into the earth bag, then paving the gravel particles on two sides of the opening of the model box, providing temporary support for the compaction of the roadbed packing layer 3 in the model during construction, and providing good drainage performance for the model test after construction; the geogrid 4 can be understood as that after the roadbed packing layer 3 is compacted every time, a layer of geogrid 4 is uniformly laid for enhancing the integral rigidity of the indoor model to limit the deformation of the indoor model, after the roadbed packing layer 3 is compacted, a certain prestress is applied to the geogrid 4, the steel pull rods 21 and the lattice steel frames 2 can be understood as that the steel pull rods 21 are placed between each compacted soil layer to provide pulling force for the lattice steel frames 2 at two sides of the model, the steel pull rods 21 are provided with gaskets 23 and fastening nuts 22, the lattice steel frames 2 and the steel pull rods 21 cooperate through the nuts 22 and the gaskets 23 to provide a constraint force in the near-air direction for the physical model, a reinforced concrete panel in actual construction is simulated, the structural stability of the physical model is ensured, and an expanding agent can be used for filling and expanding a gap between the lattice steel frames 2 and the gravel bag 8 to further compact and stabilize the structure, the model loading device 6 can be understood as a device for simulating cyclic loading in the process of train traveling, and because the part of the structure is a common component in the prior art, the simulation of train traveling can be realized by adopting the cylinder, the motor and the pressure sensor, which is not described herein in much detail, and the experimental process of the invention is as follows: the method comprises the steps of prefabricating gravel bags 8, compacting a roadbed packing layer 3, paving a geogrid 4, applying prestress, arranging a lattice steel frame 2 and a steel pull rod 21 and paving a ballast layer 7, starting a model loading device 6 after model installation is completed, and carrying out simulation tests on the stability and durability of the roadbed under different heavy load working conditions.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides an indoor physics model device for reinforced earth retaining wall road bed which characterized in that: the side-limiting retaining wall comprises a model base plate (1) and side-limiting retaining walls (101) fixedly connected to two sides of the model base plate (1), wherein the top of each side-limiting retaining wall (101) is fixedly connected with a box body (9), the bottom of each box body (9) is provided with a rainfall system and a drying system, the side walls of the side-limiting retaining walls (101) are connected with a dehumidifying system (17), a plurality of layers of roadbed packing layers (3) are arranged between the side-limiting retaining walls (101), geogrids (4) are arranged between the layers of roadbed packing layers (3), ballast layers (7) are laid above the layers of roadbed packing layers (3), track models (5) are connected above the ballast layers (7), a model loading device (6) is fixedly connected to the upper ends of the side-limiting retaining walls (101), blocking parts connected between the side-limiting retaining walls (101) and the roadbeds (3) are further included, and two open ends of the side-limiting retaining walls (101) are connected with limiting parts, the water-saving device also comprises a water inlet pipe (18) used for conveying water to the multi-layer roadbed packing layer (3) and a water outlet pipe (19) used for draining the multi-layer roadbed packing layer (3);
the ballast layer (7) top fixedly connected with fixed plate (25), fixed plate (25) bottom fixedly connected with electrolyte case (27), electrolyte case (27) bottom fixedly connected with battery case (30), electrolyte case (27) bottom is equipped with the opening, the sealed sliding connection of opening part has piston (28), piston (28) bottom fixedly connected with wire drawing (29), the one end that piston (28) were kept away from in wire drawing (29) passes battery case (30) and downwardly extending, wire drawing (29) lower extreme fixedly connected with traction block (34), traction block (34) are used for installing in roadbed packing layer (3), battery case (30) top fixedly connected with positive and negative electrode (31), install signal transmission device (26) on fixed plate (25), positive and negative electrode (31) with signal transmission device electric connection, the battery box is characterized in that a clamping plate (32) is fixedly connected to the bottom of the battery box (30), a disposable clamping strip (33) is fixedly connected to the clamping plate (32), and the clamping strip (33) is fixedly connected with the drawing wire (29).
2. The indoor physical model device for a reinforced retaining wall subgrade according to claim 1, characterized in that: the blocking component comprises a gravel bag (8), and the gravel bag (8) is positioned between the side-limit retaining wall (101) and the roadbed packing layer (3).
3. The indoor physical model device for a reinforced retaining wall subgrade according to claim 2, characterized in that: spacing portion includes two check steelframes (2), two check steelframe (2) are connected respectively two open ends of limit barricade (101), check steelframe (2) internally mounted toughened glass (24), two be connected with steel pull rod (21) between check steelframe (2), steel pull rod (21) are a plurality of, and are located a plurality of between geogrid (4), seted up on toughened glass (24) and be convenient for the through-hole that steel pull rod (21) run through.
4. The indoor physical model device for a reinforced retaining wall subgrade according to claim 3, characterized in that: the steel pull rod (21) both ends pass toughened glass (24) with lattice steel frame (2) and threaded connection has nut (22), steel pull rod (21) is gone up to cup joint gasket (23), gasket (23) are located nut (22) with between lattice steel frame (2).
5. An indoor physical model device for a reinforced retaining wall roadbed as claimed in any one of claims 1 to 4, wherein: the roadbed packing layers (3) are three layers, and the number of the geogrids (4) is four.
6. The indoor physical model device for a reinforced retaining wall subgrade according to claim 5, characterized in that: the roadbed packing layer (3) is made of one or more of coal slag, blast furnace slag, steel slag and carbide slag.
7. An indoor physical model device for a reinforced retaining wall roadbed as claimed in any one of claims 1 to 4, wherein: the ballast layer (7) adopts coarse gravel or broken stone.
8. The indoor physical model device for a reinforced retaining wall subgrade according to claim 1, characterized in that: the rainfall system comprises a first support (10) fixedly connected to the bottom of the box body (9), an atomizing spray head (11) is connected to the bottom of the first support (10), a water supply pipe (12) is arranged on the box body (9), and an electronic flowmeter (15) is connected to the water supply pipe (12).
9. The indoor physical model device for a reinforced retaining wall subgrade according to claim 1, characterized in that: drying system includes fixed connection second support (13) in box (9) bottom, bathroom heater warm light (14) are installed to second support (13) bottom box (9) outer wall connection have with temperature control switch (16) that bathroom heater warm light (14) electrical property links to each other.
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| CN202011524863.0A CN112763314B (en) | 2020-12-22 | 2020-12-22 | Indoor physical model device for reinforced earth retaining wall roadbed |
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| CN202011524863.0A CN112763314B (en) | 2020-12-22 | 2020-12-22 | Indoor physical model device for reinforced earth retaining wall roadbed |
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