CN110142849B - Multi-scale lining model axis accurate positioning device and operation method thereof - Google Patents
Multi-scale lining model axis accurate positioning device and operation method thereof Download PDFInfo
- Publication number
- CN110142849B CN110142849B CN201910418168.7A CN201910418168A CN110142849B CN 110142849 B CN110142849 B CN 110142849B CN 201910418168 A CN201910418168 A CN 201910418168A CN 110142849 B CN110142849 B CN 110142849B
- Authority
- CN
- China
- Prior art keywords
- scale
- connecting rod
- mold
- die
- positioning device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
- B28B7/0008—Venting channels, e.g. to avoid vacuum during demoulding or allowing air to escape during feeding, pressing or moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
- B28B7/0032—Moulding tables or similar mainly horizontal moulding surfaces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a multiscale lining model axis accurate positioning device and an operation method thereof, and the multiscale lining model axis accurate positioning device comprises a mould a, a mould b and a scale chassis, wherein the mould b is sleeved outside the mould a, the mould a and the mould b are both arranged on the upper surface of the scale chassis, the mould a consists of a transparent mould and an axis positioning system arranged in the transparent mould, the axis positioning system consists of a knob structure, a ventilation structure, a connecting rod structure and a compression cavity, the compression cavity is internally provided with the connecting rod structure, the connecting rod structure penetrates through the compression cavity to be connected with the bottom of the compression cavity, the knob structure is connected with the connecting rod structure through a knob screw, and the ventilation structure is arranged inside the connecting rod structure; the die b is formed by connecting two main structures of the die b with the same structure. The method has strong operability and feasibility, can meet the technical conditions specified by the test regulations of the existing physical similarity model, and has remarkable economic benefit.
Description
Technical Field
The invention belongs to the field of physical similar model tests, and particularly relates to a multi-scale lining model axis accurate positioning device and an operation method thereof.
Background
In recent ten years, mountain tunnels and underground structures are frequently damaged by earthquakes, and how to research the dynamic response and the damage mechanism of the tunnels under the action of strong earthquakes and adopt effective and reasonable anti-seismic measures has become one of the important subjects in the current tunnel anti-seismic research. Because the earthquake has strong randomness, the existing simulation analysis and theoretical calculation can not completely reflect the complexity of the earthquake, and the vibration table test is the most direct method for researching the earthquake dynamic response and the damage rule of the tunnel structure, so that the method not only can truly restore the damage process of the tunnel structure under the action of the earthquake, but also is the basis of numerical analysis and theoretical calculation.
In the current shaking table test, gypsum material is selected for similar materials of the lining structure. And completing the indoor preparation of the tunnel structure by determining the model similarity ratio. However, in order to complete the preparation of the lining structure in the laboratory test, a mold and a technical method for preparing the tunnel lining structure are inevitably required. The invention mainly aims at the current common circular tunnel section to design. In the current research, some lining structure model test pieces are prepared by quickly manufacturing a wood mold, the method is simple, the cost is low, but the wood mold is easy to deform when meeting water, so that the size error of the lining structure model is directly caused, and an obvious size effect is generated; some wood molds have a double-layer steel circular sleeve structure, and the problem that the wood molds are easy to deform when meeting water is solved to a certain extent, but the molds are high in manufacturing cost and complex to operate; and a steel structure and a transparent glass sleeve combined structure are adopted, the sleeve is light and easy to demould, but the problems of different lining structure thicknesses and the like caused by accurate axis positioning cannot be fundamentally solved, so that a large error is caused in the simulation process of a physical similar model test tunnel, and the application type and operability of a model test are poor.
Therefore, in a shaking table model test, the preparation of a tunnel lining structure model still has more problems, and an experimental device and a technical method which are simple to operate, economical and convenient are not found at present, can meet the preparation of a multi-scale lining structure model, can accurately realize the axle center positioning and overcome the problem of the size effect of a lining structure.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the multi-scale lining model axis accurate positioning device and the operation method thereof, the device has the characteristics of simple assembly, mold recycling, economy, high efficiency and the like, the rapid axis positioning of the model test lining structure model is realized, the eccentricity and the thickness inconsistency in the lining structure preparation process are avoided, the problems of difficult multi-scale preparation, time and labor waste and the like of the lining structure are solved, the operability and the feasibility are strong, the technical conditions specified by the existing physical similar model test procedures can be met, and the economic benefit is obvious.
The technical scheme is as follows: in order to achieve the purpose, the invention provides a multiscale lining model axis accurate positioning device which comprises a mould a, a mould b and a scale chassis, wherein the mould b is sleeved outside the mould a, the mould a and the mould b are both arranged on the upper surface of the scale chassis, the mould a consists of a transparent mould and an axis positioning system arranged in the transparent mould, the axis positioning system consists of a knob structure, a ventilation structure, a connecting rod structure and a compression cavity, the compression cavity is internally provided with the connecting rod structure, the connecting rod structure penetrates through the compression cavity to be connected with the bottom of the compression cavity, the knob structure is connected with the connecting rod structure through a knob screw, and the ventilation structure is arranged inside the connecting rod structure; the die b is formed by connecting two die b main structures with the same structure, a butt joint is arranged in the middle of each die b main structure, and an embedding structure body is arranged at one end of each die b main structure, and an embedding groove is formed in the other end of each die b main structure.
Furthermore, the connecting rod structure comprises a connecting rod base and a connecting rod spring, and the connecting rod base is connected with the bottom of the compression cavity through the connecting rod spring.
Furthermore, the ventilation structure comprises a vent hole, a vent hole passage and a vent cap, the vent hole passage penetrates through the connecting rod base and is communicated with the compression cavity and the external atmospheric pressure, vent holes are formed in two ends of the vent hole passage, and the vent cap is arranged on the vent hole in the top of the vent hole passage.
Furthermore, the transparent mould is of a cylindrical opening structure with a compact upper opening and a compact lower opening, the opening is also cylindrical, and the size and the dimension of the transparent mould are the same as those of the axis positioning system.
Furthermore, the upper surface of the scale chassis is provided with scale marks.
Further, the diameter of the knob screw is 15 mm.
Further, the diameter of the vent hole is 3 mm.
Furthermore, the scale base plate is of a cylinder structure with the diameter of 200mm and the height of 10mm, and the scale marks are circular scale marks with the distance of 10 mm.
Further, the outer diameter of the main structure of the die b is 3-6mm larger than the inner diameter of the main structure of the die b.
An operation method of the multi-scale lining model axis accurate positioning device comprises the following steps:
(1) before pouring, uniformly coating machine oil on the inner wall of the main structure of the die b by using a brush;
(2) determining the size and thickness of the lining structure to be prepared, and selecting a transparent mould corresponding to the size and thickness, wherein the thickness of the lining structure to be prepared is obtained by subtracting the outer diameter of the transparent mould from the inner diameter of the mould b;
(3) mounting a knob structure to the linkage device, then nesting the combined axis positioning device into a transparent mold to form a complete cylinder structure, and placing the cylinder structure on an accurate position of the scale chassis;
(4) combining the two structure main bodies of the die b in a one-to-one correspondence mode of the embedded structure bodies and the embedded grooves, sleeving the two structure main bodies on the periphery of the cylindrical structure in the step (3), and placing the two structure main bodies at accurate positions according to the circular scale marks on the scale chassis;
(5) pushing the knob structure downwards to perform axis positioning, and if the knob structure is just tangent to the mold b, accurately positioning the axis, thus performing pouring work; if not, returning to the step (4) to carry out position calibration until the tangency is achieved;
(6) after the axis is accurately positioned, pouring the prepared similar material, then demoulding, and putting the similar material into a curing box for standard curing;
(7) and (4) after demolding, cleaning the main structure of the mold b, repeating the steps (1) to (6) and preparing the next group of lining samples.
Has the advantages that: compared with the prior art, the invention has the following advantages:
the invention can meet the requirements of fast and accurate positioning and fast prefabrication of the lining structure model in a physical similar model test, and fast solves the multi-scale problem, and a series of transparent molds with different outer diameters can save the time for processing the steel mold in the test process, save a large amount of test processing cost, and fundamentally solve the problems of difficult preparation of the multi-scale lining structure and the like. The test mold and the method are reasonable, effective, simple and quick, and can meet the technical requirements specified by the test regulations of the existing physical similarity model.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the mold a in FIG. 1;
FIG. 3 is a schematic structural view of the scale base plate of FIG. 1;
FIG. 4 is a schematic structural view of the knob structure of FIG. 1;
FIG. 5 is a schematic structural view of the mold b in FIG. 1;
fig. 6 is a top view of the mold b of fig. 1.
1. A knob structure; 2. a knob screw; 3. a ventilation cap; 4. a vent hole; 5. a vent passage; 6. a connecting rod base; 7. a link spring; 8. compressing the cavity; 9. a transparent mold; 10. a scale chassis; 11. scale marks; 12. butt-joint seam; 13. a main structure of a die b; 14. an embedded structure; 15. embedding the groove; 16. the outer diameter of a main structure of the die b; 16. and the inner diameter of the main structure of the die b.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 6, the invention relates to a multiscale lining model axis accurate positioning device in a similar model test and a using method thereof, the device comprises a mould a, a mould b main structure 13 and a scale chassis 10, wherein the mould a comprises an axis positioning system and a transparent mould, the axis positioning system is connected with a connecting rod base 6 through a knob structure 1 and a knob screw 2, and the diameter of the screw is 15 mm. The knob structure 1 pushes the connecting rod base 6 downwards to apply work to the compression cavity 8, potential energy is converted into elastic potential energy stored in the connecting rod spring 7, and the axis positioning systems slide in a lossless mode. Air in the compression cavity 8 is discharged from the vent hole 4 along the vent hole channel 5, when the knob structure 1 falls to the lowest position, if the center of the circle coincides with the main structure 13 of the mold b (namely, the knob structure 1 is just embedded into the main structure 13 of the mold b and is tangent to the main structure 13 of the mold b), preliminary axis positioning is completed, and at the moment, the main structure 13 of the mold b is located at the axis position, otherwise. The knob structure 1 is released, and can be restored to the initial position under the action of the elastic potential energy of the connecting rod spring. The ventilation structure penetrates through the connecting rod base 6 and is communicated with the compression cavity 8 and the external atmospheric pressure, and the ventilation hole is a hollow structure which has a diameter of 3mm and penetrates through the connecting rod base and the compact structure.
In the invention, the die b consists of two completely identical main structures 13 of the die b, and the position of the butt seam 12 is provided with a caulking structure body 14 and a caulking groove 15 which are matched in size. The embedded structure 14 and the embedded groove 15 are both located at the center of the circular ring, and the length × width × height is 220mm × 2mm × 3mm of rectangular structure.
In the invention, the scale base plate 10 is of a cylinder structure with the diameter of 200mm and the height of 10mm, a series of circular scale marks 11 with the diameter of 90-200mm and the equal difference of 10mm are distributed on the surface of the scale base plate 10, and the accurate axis positioning of the die b is completed.
The transparent mould 9 is composed of a series of cylinders with different outer diameters, and lining model structures with different thicknesses can be poured by combining the cylinders with different diameters and the mould b. The diameter and the volume of the opening of the cylinder are the same as those of the axis positioning system.
An operation method of a multiscale lining model axis accurate positioning device in a similar model test comprises the following steps:
a. before pouring, uniformly coating machine oil on the inner wall of the main structure 13 of the die b by using a brush;
b. determining the size and thickness of the lining structure to be prepared, and selecting the corresponding transparent mold 9 (mold b main structure 13 inner diameter-transparent mold 9 outer diameter is the thickness of the lining structure to be prepared)
c. And mounting the knob structure 1 to the linkage device, then nesting the combined axis positioning device into a transparent mould 9 to form a complete cylinder structure, and placing the cylinder structure on the accurate position of the scale base plate 10.
d. Combining the two structure main bodies 13 of the die b in a one-to-one correspondence mode of the embedded structure bodies 14 and the embedded grooves 15, sleeving the two structure main bodies on the periphery of the cylindrical structure in the step c, and placing the two structure main bodies at accurate positions according to the circular scale marks on the scale base plate 10;
e. the knob structure 1 is pushed downwards to perform axis positioning. If the knob structure 1 is just tangent to the main structure 13 of the die b, the axis is accurately positioned, and then pouring can be carried out; if the mold b is not tangent, the position of the main structure 13 of the mold b still needs to be adjusted until the mold b is tangent.
f. And after the axis is accurately positioned, pouring the prepared similar material, demolding, and putting into a curing box for standard curing.
g. And after demolding, cleaning the main structure 13 of the mold b, and repeating the steps to prepare the next group of lining samples.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a multiscale lining cutting model axle center accurate positioning device which characterized in that: the scale comprises a mold a, a mold b and a scale chassis, wherein the mold b is sleeved outside the mold a, the mold a and the mold b are both arranged on the upper surface of the scale chassis, the mold a is composed of a transparent mold and an axis positioning system arranged in the transparent mold, the axis positioning system is composed of a knob structure, a vent structure, a connecting rod structure and a compression cavity, the connecting rod structure is arranged in the compression cavity, the connecting rod structure penetrates through the compression cavity to be connected with the bottom of the compression cavity, the knob structure is connected with the connecting rod structure through a knob screw, and the vent structure is arranged in the connecting rod structure; the die b is formed by connecting two die b main structures with the same structure, a butt joint is arranged in the middle of each die b main structure, and an embedding structure body is arranged at one end of each die b main structure, and an embedding groove is formed in the other end of each die b main structure.
2. The accurate positioning device for the axle center of the multi-scale lining model according to claim 1, characterized in that: the connecting rod structure comprises a connecting rod base and a connecting rod spring, and the connecting rod base is connected with the bottom of the compression cavity through the connecting rod spring.
3. The accurate positioning device for the axle center of the multi-scale lining model according to claim 1, characterized in that: the ventilation structure comprises a ventilation hole, a ventilation hole channel and a ventilation cap, the ventilation hole channel penetrates through the connecting rod base and is communicated with the compression cavity and external atmospheric pressure, ventilation holes are formed in two ends of the ventilation hole channel, and the ventilation cap is arranged on the ventilation hole in the top of the ventilation hole channel.
4. The accurate positioning device for the axle center of the multi-scale lining model according to claim 1, characterized in that: the transparent die is of a cylindrical opening structure with an upper opening and a lower compact part, the opening is also cylindrical, and the size and the dimension of the transparent die are the same as those of the axis positioning system.
5. The accurate positioning device for the axle center of the multi-scale lining model according to claim 1, characterized in that: and the upper surface of the scale chassis is provided with scale marks.
6. The accurate positioning device for the axle center of the multi-scale lining model according to claim 1, characterized in that: the diameter of the knob screw is 15 mm.
7. The accurate positioning device for the axle center of the multi-scale lining model according to claim 3, characterized in that: the diameter of the vent hole is 3 mm.
8. The accurate positioning device for the axle center of the multi-scale lining model according to claim 5, characterized in that: the scale chassis is a cylinder structure with the diameter of 200mm and the height of 10mm, and the scale marks are circular scale marks with the same interval of 10 mm.
9. The accurate positioning device for the axle center of the multi-scale lining model according to claim 1, characterized in that: the outer diameter of the main structure of the die b is 3-6mm larger than the inner diameter of the main structure of the die b.
10. An operation method of the multiscale lining model axis accurate positioning device according to one of claims 1 to 9, comprising the following steps:
(1) before pouring, uniformly coating machine oil on the inner wall of the main structure of the die b by using a brush;
(2) determining the size and thickness of the lining structure to be prepared, and selecting a transparent mould corresponding to the size and thickness, wherein the thickness of the lining structure to be prepared is obtained by subtracting the outer diameter of the transparent mould from the inner diameter of the mould b;
(3) mounting a knob structure to the linkage device, then nesting the combined axis positioning device into a transparent mold to form a complete cylinder structure, and placing the cylinder structure on an accurate position of the scale chassis;
(4) combining the two structure main bodies of the die b in a one-to-one correspondence mode of the embedded structure bodies and the embedded grooves, sleeving the two structure main bodies on the periphery of the cylindrical structure in the step (3), and placing the two structure main bodies at accurate positions according to the circular scale marks on the scale chassis;
(5) pushing the knob structure downwards to perform axis positioning, and if the knob structure is just tangent to the mold b, accurately positioning the axis, thus performing pouring work; if not, returning to the step (4) to carry out position calibration until the tangency is achieved;
(6) after the axis is accurately positioned, pouring the prepared similar material, then demoulding, and putting the similar material into a curing box for standard curing;
(7) and (4) after demolding, cleaning the main structure of the mold b, repeating the steps (1) to (6) and preparing the next group of lining samples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910418168.7A CN110142849B (en) | 2019-05-20 | 2019-05-20 | Multi-scale lining model axis accurate positioning device and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910418168.7A CN110142849B (en) | 2019-05-20 | 2019-05-20 | Multi-scale lining model axis accurate positioning device and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110142849A CN110142849A (en) | 2019-08-20 |
| CN110142849B true CN110142849B (en) | 2020-10-02 |
Family
ID=67592332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910418168.7A Active CN110142849B (en) | 2019-05-20 | 2019-05-20 | Multi-scale lining model axis accurate positioning device and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110142849B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8613417D0 (en) * | 1986-06-03 | 1986-07-09 | Ici Plc | Extrusion die |
| JP2583827B2 (en) * | 1994-04-07 | 1997-02-19 | 株式会社ホクコン | Formwork equipment for manufacturing corner blocks for gutters |
| CN201592479U (en) * | 2009-11-11 | 2010-09-29 | 宁波科星材料科技有限公司 | Radially oriented ring die |
| CN208834628U (en) * | 2017-12-31 | 2019-05-07 | 浙江大学 | A kind of Die tester pouring cylindrical tunnel-liner |
| CN208438538U (en) * | 2018-05-23 | 2019-01-29 | 中国石油大学(北京) | A kind of experiment casing-cement sheath assembly producing device |
-
2019
- 2019-05-20 CN CN201910418168.7A patent/CN110142849B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110142849A (en) | 2019-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104297103B (en) | 3D print building mortar workability testing device and application | |
| CN110567777A (en) | hollow cylinder remolded soil sample bidirectional sample pressing device and method | |
| CN110142849B (en) | Multi-scale lining model axis accurate positioning device and operation method thereof | |
| CN109719834B (en) | Concrete test block manufacturing device easy to demould | |
| CN210923214U (en) | Hollow cylinder remolded soil sample bidirectional sample pressing device | |
| CN207488049U (en) | A kind of simple die device that can largely prepare concrete sample | |
| CN110118686B (en) | Pushing type columnar test mold and method for preparing rock similar material easy to demould | |
| CN104535389A (en) | Special testing piece mold and using method thereof | |
| CN110625769A (en) | Evaporate and press aerated concrete block shedder | |
| CN213597493U (en) | Cylinder concrete placement mould convenient to form removal | |
| CN208488306U (en) | A kind of pervious concrete Special experimental molding machine | |
| CN211762321U (en) | Novel mould for tunnel model test | |
| CN210690196U (en) | Physical similar material test piece mould of variable volume | |
| CN209886414U (en) | Y-shaped tee joint forming extruder | |
| CN103042631A (en) | rapid moulding method for mould | |
| CN105716920A (en) | Pre-press bottom-pushing type test mold | |
| CN202428522U (en) | Device for molding hydraulic engineering pouring asphaltic concrete | |
| CN205665093U (en) | Mould is used with test piece preparation to test of concrete mechanical properties | |
| CN205642968U (en) | Jumbo size geotechnique sample is with system appearance ware | |
| CN213481836U (en) | Forming permeable concrete standard block pressing device | |
| CN219855199U (en) | Core mould vibration forming device | |
| CN213417521U (en) | Core filling machine for asphalt concrete pavement | |
| CN220219313U (en) | Rubber and metal framework jogged product mould | |
| CN110142850A (en) | Multiple dimensioned liner structure prefabricated mould and construction method in tunnel model test | |
| CN214794112U (en) | Concrete test box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |