CN113668408B - Self-falling beam rotating spherical hinge - Google Patents
Self-falling beam rotating spherical hinge Download PDFInfo
- Publication number
- CN113668408B CN113668408B CN202110974532.5A CN202110974532A CN113668408B CN 113668408 B CN113668408 B CN 113668408B CN 202110974532 A CN202110974532 A CN 202110974532A CN 113668408 B CN113668408 B CN 113668408B
- Authority
- CN
- China
- Prior art keywords
- pendulum
- base plate
- ball
- swivel
- solid
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
Abstract
A self-dropping beam swivel ball hinge comprising: the device comprises an upper ball pendulum, a wear-resistant sliding plate, a lower ball pendulum, a base plate and a solid-liquid convertible material; the lower ball pendulum is arranged below the upper ball pendulum; the wear-resistant sliding plate is arranged between the upper ball pendulum and the lower ball pendulum; the upper surface of the bottom plate of the base plate is provided with a containing groove, the solid-liquid conversion material is arranged in the containing groove, and the bottom surface of the lower spherical pendulum is in contact with the upper surface of the solid-liquid conversion material. Therefore, the beam falling function can be realized through the swivel spherical hinge, a jack is not needed, field construction instruments are reduced, and the construction safety is improved; furthermore, a large amount of manpower and material resource cost is saved, and the construction period is shortened.
Description
Technical Field
The application relates to the technical field of bridge engineering, in particular to a self-falling beam swivel spherical hinge.
Background
Swivel construction is a common construction method in bridge engineering, and is widely applied to various bridges such as railways, rail transit or highways. The bridge swivel construction refers to a construction method for pre-forming a beam body section at a non-designed axis position, then taking the beam body section as a rotor, and rotating the beam body section to a bridge position axis position, so that the beam body section and a main structure of a bridge are butted in place. Currently, the most common swivel construction method is a horizontal swivel construction method. The horizontal swivel construction method can be classified into a pier bottom swivel method and a pier top swivel method according to the difference in the mounting position of the swivel device. The pier top swivel method is a novel swivel construction method appearing in recent years, and usually a swivel spherical hinge is arranged between the top end of a pier body and a beam body section, so that the upper beam body section can be driven to rotate through the swivel spherical hinge.
In the prior art, after the swivel of the existing swivel spherical hinge is completed, roof-girder falling construction is often required to be performed in a relatively narrow space of a pier top, so that the dismounting of the swivel spherical hinge, the installation of a permanent support and the girder falling of a girder body are completed, and the stress conversion process from the swivel spherical hinge to the permanent support is completed. A large number of jacks are usually used in the roof beam falling construction, and the synchronous operation needs to be carried out on the large number of jacks simultaneously, so that the safety risk is extremely high; in addition, a large amount of manpower and material resources are consumed in the existing roof beam falling construction process, and the construction period is long.
In summary, because the ball pivot of turning among the prior art has as above not enough, consequently design one kind and possess the ball pivot of turning from the roof beam function that falls to can avoid using a large amount of jacks at the roof beam work progress that falls, reduce the construction equipment, make on-the-spot device installation convenient and fast more, improve the security of construction, be the problem that needs to solve in the field urgently.
Disclosure of Invention
In view of the above, the invention provides a self-falling beam swivel spherical hinge, so that a beam falling function can be realized through the swivel spherical hinge, a jack is not required, field construction equipment is reduced, and construction safety is improved; furthermore, a large amount of manpower and material resource cost is saved, and the construction period is shortened.
The technical scheme of the invention is realized as follows:
a self-dropping beam swivel ball hinge comprising: the device comprises an upper ball pendulum, a wear-resistant sliding plate, a lower ball pendulum, a base plate and a solid-liquid convertible material;
the lower surface of the upper pendulum is provided with a convex spherical surface, the middle part of the convex spherical surface is provided with a pin shaft hole, the lower pendulum is arranged below the upper pendulum, the upper surface of the lower pendulum is provided with a concave spherical surface matched with the convex spherical surface of the upper pendulum, and the middle part of the concave spherical surface is provided with a pin shaft matched with the pin shaft hole;
the wear-resistant sliding plate is arranged between the upper ball pendulum and the lower ball pendulum;
the upper surface of the bottom plate of the base plate is provided with a containing groove, the solid-liquid conversion material is arranged in the containing groove, and the bottom surface of the lower spherical pendulum is in contact connection with the upper surface of the solid-liquid conversion material.
Preferably, a sealing device is installed on the periphery of the bottom of the lower pendulum, and the outer side surface of the sealing device is tightly attached to the inner wall of the accommodating groove.
Preferably, the sealing device comprises: the device comprises a first sealing device and a second sealing device, wherein the first sealing device is arranged at the bottommost part of the lower ball pendulum, and the second sealing device is arranged above the first sealing device.
Preferably, paraffin is used as the solid-liquid convertible material.
Preferably, the bottom of the containing groove of the base plate is uniformly provided with a plurality of liquid drainage channels leading to the outer side of the base plate, and the ports of the liquid drainage channels are provided with sealing and plugging wires.
Preferably, a plurality of first limiting blocks are arranged at the outer ring of the upper pendulum, a plurality of second limiting blocks are arranged at the edge of the outer ring of the base plate, the second limiting blocks are evenly distributed, a notch is formed between the second limiting blocks and the outer side wall of the containing groove, and the first limiting blocks are inserted into the notch.
Preferably, a heating device is arranged in the bottom plate of the base plate.
Preferably, the heating device uses heating wires, grooves are uniformly distributed on a bottom plate of the base plate, the heating wires are arranged in the grooves, and cover plates are arranged on the grooves.
Preferably, a plurality of anchoring components are arranged on the upper pendulum, and a plurality of anchoring components are arranged on the base plate.
Preferably, a reinforcing rib plate is arranged on the upper pendulum.
As can be seen from the above, in the self-falling beam swivel spherical hinge, the layer of solid-liquid conversion material is filled in the swivel spherical hinge, and the beam falling function of the beam body section is realized through the form change of the solid-liquid conversion material, so that the solid-liquid conversion material has low cost, is easy to obtain and has stable chemical performance, thereby not only reducing field construction equipment, but also facilitating the field installation and improving the construction safety; furthermore, a large amount of manpower and material resource cost is saved, and the construction period is shortened.
Drawings
Fig. 1 is a schematic view of a mounting position of a self-landing beam swivel ball joint in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a self-landing beam swivel ball joint in an embodiment of the present invention.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
FIG. 4 is a schematic front view of a base plate in an embodiment of the invention.
FIG. 5 is a top view of a base plate in an embodiment of the invention.
Detailed Description
In order to make the technical scheme and advantages of the invention more apparent, the invention is further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 5, the present invention provides a self-landing beam swivel ball hinge, including: an upper spherical pendulum 11, a wear-resistant sliding plate 12, a lower spherical pendulum 13, a base plate 15 and a solid-liquid convertible material 19;
a convex spherical surface is arranged on the lower surface of the upper pendulum 11, a pin shaft hole 111 is arranged in the middle of the convex spherical surface, the lower pendulum 13 is arranged below the upper pendulum 11, a concave spherical surface matched with the convex spherical surface of the upper pendulum is arranged on the upper surface of the lower pendulum 13, and a pin shaft 131 matched with the pin shaft hole 111 is arranged in the middle of the concave spherical surface;
the wear-resistant sliding plate 12 is arranged between the upper ball pendulum 11 and the lower ball pendulum 13;
the base plate 15 has a receiving groove 152 formed on an upper surface of a bottom plate 153, the solid-liquid conversion material 19 is placed in the receiving groove 152, and a bottom surface of the lower pendulum 13 is in contact with an upper surface of the solid-liquid conversion material 19.
In the technical scheme of the invention, the self-falling beam swivel spherical hinge can be realized by using various realization methods. The technical solution of the present invention will be described in detail below by taking one implementation manner as an example.
For example, in an embodiment of the present invention, as shown in fig. 2, a convex spherical surface is disposed in the middle of the lower surface of the upper pendulum 11, a pin hole 111 is disposed in the middle of the convex spherical surface, the lower pendulum 13 is disposed below the upper pendulum 11, the lower surface of the lower pendulum 13 is a circular plane, the upper surface of the lower pendulum 13 is a concave spherical surface matched with the convex spherical surface of the upper pendulum, and a pin 131 matched with the pin hole 111 is disposed in the middle of the concave spherical surface; the pin shaft hole 111 on the upper pendulum 11 is connected with the pin shaft 131 on the lower pendulum 13 in a matching way, and the matching clearance of the pin shaft hole 111 and the pin shaft 131 meets the swing stroke.
Preferably, a plurality of anchoring assemblies 113 are arranged on the upper pendulum 11, so that the upper pendulum 11 can be fixedly connected with the beam body section above the swivel ball joint through the plurality of anchoring assemblies 113. When the swing construction is carried out, the beam body drives the upper spherical pendulum 11 to rotate through the sliding friction between the upper spherical pendulum 11 and the wear-resistant sliding plate 12.
Preferably, the upper pendulum 11 may be provided with a reinforcing rib 112, so that the local rigidity of the upper pendulum and the connection strength with concrete may be improved.
For another example, in an embodiment of the present invention, as shown in fig. 2 to 4, a receiving groove 152 is preferably disposed on the bottom plate 153 of the base plate 15, and the solid-liquid conversion material 19 is disposed in the receiving groove 152.
In addition, as an example, in a preferred embodiment of the present invention, as shown in fig. 2 and fig. 3, a sealing device is installed on the periphery of the bottom of the lower pendulum 13, and an outer side surface of the sealing device is tightly attached to the inner wall of the receiving groove 152, so that the sealing performance inside the receiving groove 152 is ensured, and thus, when the lower pendulum 13 descends while the solid-liquid convertible material 19 is converted into liquid, the liquid is prevented from overflowing along the inner wall of the receiving groove.
Preferably, the sealing means may comprise: a first sealing device 17 and a second sealing device 18, wherein the first sealing device 17 is arranged at the bottommost part of the lower pendulum 13, and the second sealing device 18 is arranged above the first sealing device 17.
The sealing device can adopt various types on the premise of meeting the sealing performance, wherein the sealing device comprises but is not limited to a V-shaped sealing ring, an O-shaped sealing ring, a Y-shaped sealing ring, a combined sealing ring and the like.
Preferably, the first sealing device 17 is a Y-shaped sealing ring; the second sealing device 18 is an O-ring.
For another example, preferably, in an embodiment of the present invention, paraffin may be used as the solid-liquid convertible material 19.
The paraffin is solid at normal temperature, and can be converted into liquid by heating or other means when falling the beam, and in addition, the paraffin has the advantages of low cost, easy acquisition, pressure in a sealed container, difficult deformation and the like, and has stable chemical properties and high reliability.
In addition, as an example, in a preferred embodiment of the present invention, as shown in fig. 3, the bottom of the receiving groove 152 of the base plate 15 may be uniformly provided with a plurality of drainage channels 16 leading to the outside of the base plate, and the sealing plug 161 is installed at the end of the drainage channel 16.
After the solid-liquid conversion material 19 is converted into liquid, the sealing plug 161 is opened, the liquid can be discharged out of the accommodating groove 152 through the liquid discharge hole 16 arranged on the base plate, along with the reduction of the volume of the liquid in the accommodating groove 152, the bottom of the lower spherical pendulum 13 also descends, the self-beam-falling function of the swivel spherical hinge is further realized, the beam-falling process can be regulated, and the falling height of the beam body can be regulated by controlling the volume of the discharged liquid.
In addition, as an example, in a preferred embodiment of the present invention, as shown in fig. 2, a plurality of first stoppers 23 are uniformly distributed at an outer ring of the upper pendulum 11, a plurality of second stoppers 22 are uniformly distributed at an outer ring edge of the base plate 15, a notch 25 is formed between the second stopper 22 and an outer side wall of the receiving groove 152, and the first stopper 23 can be inserted into the notch 25, so that a limiting effect can be achieved between the upper pendulum and the base plate, and an uneven sinking or a small-amplitude corner of the swivel ball hinge during a beam falling process can be prevented.
Preferably, a wear-resistant sliding pair may be disposed between the first limiting block 23 and the second limiting block 22, so that it can be ensured that the lower ball pendulum, the upper ball pendulum and the beam body fall along with the decrease of the volume of the liquid in the accommodating groove 152 during the beam falling process, and at this time, even if the first limiting block 23 on the upper ball pendulum slides in contact with the second limiting block 22 on the base plate, a large frictional resistance is not generated.
Preferably, a plurality of anchoring assemblies 151 are disposed on the base plate 15, so that the base plate 15 can be fixedly connected with the pier below the swivel ball joint through the plurality of anchoring assemblies 151.
Further, as an example, in a preferred embodiment of the present invention, as shown in fig. 5, a heating device may be provided in the bottom plate 153 of the base plate 15 so that the heating device can heat the solid-liquid convertible material 19.
Preferably, the heating device may use heating wires, and the bottom plate 153 of the base plate 15 is provided with uniformly distributed grooves, in which the heating wires 20 are disposed.
Preferably, a cover plate may be provided on the groove so that the heating wire inside the groove may be sealed.
Preferably, the joints at two ends of the heating wire can be arranged outside the base plate and connected with the temperature controller, so as to control the temperature of the heating wire
And make the speed of falling the roof beam to control through the temperature of regulation and control heater strip, if the engineering time is comparatively nervous, the temperature of heater strip is increaseed to the accessible temperature controller, makes paraffin melt speed accelerate, and paraffin liquefaction degree is higher, and exhaust speed is faster, and then makes the speed that the roof beam body of upper and lower ball pendulum and top descends accelerate, improves the efficiency of construction.
In order to ensure that the solid-liquid conversion material 19 can be rapidly converted from a solid state to a liquid state, a heating device is arranged to heat the solid-liquid conversion material, the heating device can select heating wires, heating rods or heating pipes, and the like, the arrangement mode can select external winding or internal embedding, and in order to enable the solid-liquid conversion material 19 to be uniformly heated, the heating wires are preferably adopted to be embedded in the base plate 15 at the bottom of the solid-liquid conversion material 19.
The experiment of the invention proves that:
in order to simulate the use condition of the self-falling beam swivel ball hinge under the actual working condition, a press machine is used for carrying out a pressurization experiment on the swivel ball hinge.
The diameter of an accommodating groove of the spherical hinge of the test rotating body is 400mm, the thickness of a filling paraffin layer is 3cm, and the use specification is a YXD-400x376x24 sealing ring. The paraffin compression strength is respectively increased by 50MPa and 60MPa, and the actual use condition of the self-falling beam swivel ball joint is reduced to the maximum extent.
The equipment ball pivot of turning, the installation sealing washer, installation electric heating wire will turn the ball pivot equipment and accomplish the back, and the total height of the ball pivot of turning is 248mm before the measurement experiment, will turn the ball pivot and shift to the press test bench, connects the temperature controller, the switch on.
1. Stability of the test device:
increase pressure to 6280KN gradually for corresponding paraffin compressive strength is 50MPa, and open the heater strip power after pressure stabilization, set up the temperature to 150 ℃, continuously heat for 2 hours, observe the flowing back pore that is equipped with sealed stifled silk and the upper portion of holding tank inner wall, all do not have paraffin and leak, ensure that the holding tank internal seal is good, and the ball pivot height of measuring this moment the body of turning is 248mm, and no compression is out of shape.
Gradually increasing the pressure to 7540KN to make the compressive strength of the corresponding paraffin 60MPa, opening the power supply of the heating wire after the pressure is stable, setting the temperature to 150 ℃, continuously heating for 2 hours, observing the upper parts of the liquid discharge pore channel provided with the sealing and blocking wire and the inner wall of the accommodating groove, and ensuring that no paraffin is leaked, wherein the height of the measuring swivel ball hinge is 248mm and no change exists at the moment.
Therefore, the device is good in stability when pressure load under the actual working condition is simulated.
2. And (3) verifying the stability of the beam falling process:
under the state of keeping pressure, the sealing and blocking wire at the port of the drainage pore passage is slowly opened, and the drainage state is observed to be softened paraffin, so that the paraffin is proved to be at the melting critical point when the temperature of the heating wire is 150 ℃. To verify the descending speed, the height of the swivel ball joint at this time was measured to be 242mm after the paraffin was slowly discharged for about 1 minute, i.e., the beam falling height per minute was about 6mm.
Therefore, the self-falling beam swivel can prove that the self-falling beam swivel is stable and reliable in the process of simulating the self-falling beam.
In addition, the speed of falling the roof beam can be controlled through adjusting the temperature of heater strip, and the temperature of heater strip can be increaseed to the accessible temperature controller, makes paraffin melt speed accelerate, and the higher the paraffin liquefaction degree is, and the faster is the speed of discharging from the flowing back pore to make the speed of roof beam body whereabouts faster.
In summary, in the technical solution of the present invention, the base plate is provided with the receiving tank, the solid-liquid convertible material is arranged in the receiving tank, the solid-liquid convertible material is heated and melted to convert the solid into the liquid, and the receiving tank can be discharged, so that the upper and lower spherical pendulum above the solid-liquid convertible material and the beam structure can be lowered along with the reduction of the volume of the liquid in the receiving tank, thereby achieving the purpose of beam falling.
According to the technical scheme, the adjustable self-falling beam swivel spherical hinge is provided, so that a beam falling function can be realized through the swivel spherical hinge, a jack is not needed, field construction equipment is reduced, and construction safety is improved; furthermore, a large amount of manpower and material resource cost is saved, and the construction period is shortened.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The utility model provides a from beam rotation ball pivot that falls which characterized in that includes: the device comprises an upper ball pendulum, a wear-resistant sliding plate, a lower ball pendulum, a base plate and a solid-liquid convertible material;
the lower surface of the upper pendulum is provided with a convex spherical surface, the middle part of the convex spherical surface is provided with a pin shaft hole, the lower pendulum is arranged below the upper pendulum, the upper surface of the lower pendulum is provided with a concave spherical surface matched with the convex spherical surface of the upper pendulum, and the middle part of the concave spherical surface is provided with a pin shaft matched with the pin shaft hole;
the wear-resistant sliding plate is arranged between the upper ball pendulum and the lower ball pendulum;
an accommodating groove is formed in the upper surface of the bottom plate of the base plate, the solid-liquid conversion material is arranged in the accommodating groove, and the bottom surface of the lower ball pendulum is in contact connection with the upper surface of the solid-liquid conversion material;
a plurality of liquid drainage channels leading to the outer side of the base plate are uniformly formed in the bottom of the containing groove of the base plate, and sealing plug wires are installed at the ports of the liquid drainage channels;
a plurality of first limiting blocks which are uniformly distributed are arranged at the outer ring of the upper pendulum, a plurality of second limiting blocks which are uniformly distributed are arranged at the edge of the outer ring of the base plate, a notch is formed between the second limiting blocks and the outer side wall of the accommodating groove, and the first limiting blocks are inserted into the notch;
a heating device is arranged in the bottom plate of the base plate;
the heating device uses heating wires, grooves which are uniformly distributed are formed in the bottom plate of the base plate, the heating wires are arranged in the grooves, and cover plates are arranged on the grooves;
paraffin is used as the solid-liquid convertible material.
2. The swivel spherical hinge according to claim 1, wherein a sealing device is installed at the periphery of the bottom of the lower spherical pendulum, and the outer side surface of the sealing device is tightly attached to the inner wall of the receiving groove.
3. The swivel ball hinge according to claim 2, wherein the sealing means comprises: the device comprises a first sealing device and a second sealing device, wherein the first sealing device is arranged at the bottommost part of the lower ball pendulum, and the second sealing device is arranged above the first sealing device.
4. The swivel ball hinge of claim 1, wherein the upper pendulum has a plurality of anchor assemblies disposed thereon and the base plate has a plurality of anchor assemblies disposed thereon.
5. The swivel ball joint according to claim 1, wherein a reinforcing rib is provided on the upper pendulum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110974532.5A CN113668408B (en) | 2021-08-24 | 2021-08-24 | Self-falling beam rotating spherical hinge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110974532.5A CN113668408B (en) | 2021-08-24 | 2021-08-24 | Self-falling beam rotating spherical hinge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113668408A CN113668408A (en) | 2021-11-19 |
| CN113668408B true CN113668408B (en) | 2022-12-23 |
Family
ID=78545672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110974532.5A Active CN113668408B (en) | 2021-08-24 | 2021-08-24 | Self-falling beam rotating spherical hinge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113668408B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3209508A (en) * | 1961-04-27 | 1965-10-05 | Hunnebeck Emil Mauritz | Device for installing and removing truss frames, girders, and the like |
| CN105442459A (en) * | 2015-12-31 | 2016-03-30 | 中铁二十局集团第一工程有限公司 | Swivel system for long-span continuous beam span existing station swivel construction and construction method |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2300673C3 (en) * | 1973-01-08 | 1975-06-12 | Fried. Krupp Gmbh, 4300 Essen | Two-tier support for a bridge or similar structures, as well as a method for erecting this support |
| US6832459B2 (en) * | 2002-01-18 | 2004-12-21 | Matthew Russell | Methods and apparatus for forming and placing generally horizontal structures |
| KR100682344B1 (en) * | 2005-08-03 | 2007-02-15 | 명보산공 주식회사 | Rotation Apparatus of constructing temporary bridge |
| JP4624242B2 (en) * | 2005-11-17 | 2011-02-02 | 三菱重工鉄構エンジニアリング株式会社 | Girder construction method |
| CN101200880A (en) * | 2007-12-24 | 2008-06-18 | 中铁大桥局股份有限公司 | Steel tube arch single pivot ten-thousand-tonnage horizontal rotation swivel construction method |
| JP2014077267A (en) * | 2012-10-10 | 2014-05-01 | Koichi Suchi | Manufacturing method of composite integrated structure in accordance with vital principle of plants, material and application |
| CN203270463U (en) * | 2013-04-24 | 2013-11-06 | 中铁工程设计咨询集团有限公司 | Bridge pier top swivel structure |
| CN204370317U (en) * | 2014-11-10 | 2015-06-03 | 中铁六局集团路桥建设有限公司 | For pouring into the construction equipment of sand proportioning and closed water proof in the interim sandbox of swivel bridges |
| CN205329560U (en) * | 2015-12-31 | 2016-06-22 | 中铁二十局集团第一工程有限公司 | Large -span continuous beam bridge strides existing station rotation construction with system of turning |
| CN107313359B (en) * | 2016-04-27 | 2023-05-05 | 成都亚佳工程新技术开发有限公司 | General weighing-free steel bridge swivel spherical hinge system |
| CN108301334B (en) * | 2018-01-24 | 2020-08-04 | 洛阳双瑞特种装备有限公司 | Pier top swivel spherical hinge with beam falling prevention function and swivel method |
| CN110565539A (en) * | 2019-09-23 | 2019-12-13 | 中铁第四勘察设计院集团有限公司 | Swivel bridge with seismic isolation and reduction functions and construction method thereof |
| CN213925881U (en) * | 2020-11-02 | 2021-08-10 | 中铁第五勘察设计院集团有限公司 | Bridge rotation system |
| WO2022099548A1 (en) * | 2020-11-12 | 2022-05-19 | China Railway No.3 Engineering Group Co.Ltd | Method for installing steel tube arches |
-
2021
- 2021-08-24 CN CN202110974532.5A patent/CN113668408B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3209508A (en) * | 1961-04-27 | 1965-10-05 | Hunnebeck Emil Mauritz | Device for installing and removing truss frames, girders, and the like |
| CN105442459A (en) * | 2015-12-31 | 2016-03-30 | 中铁二十局集团第一工程有限公司 | Swivel system for long-span continuous beam span existing station swivel construction and construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113668408A (en) | 2021-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101509868B (en) | Interface shearing strength test method for adhesive bonding sample of sealant and substrate | |
| CN105547864B (en) | The assay method and dedicated full-automatic direct shear apparatus of chemical contamination shear strength of soil | |
| CN101482468B (en) | Test method for anti-permeability performance of fluid sealant and concrete bonding sample interface | |
| CN105928859A (en) | Device and method for testing rock fracture seepage parameters under high temperature and high pressure conditions | |
| CN105973698B (en) | Method of measuring resistivity and device in a kind of low temperature rock compressed creep process | |
| CN103267682A (en) | Device and method for testing material creep under coupling action of tensile stress and environment | |
| CN110220834A (en) | Visualize three axis seepage tests methods of Single Fracture rock stress-seepage flow coupling sample | |
| CN109443954B (en) | Multi-working condition torsion shear characteristic testing device and method for interface between pile or anchor and rock-soil body | |
| CN113668408B (en) | Self-falling beam rotating spherical hinge | |
| CN109946027A (en) | A kind of duct pieces of shield tunnel seam waterproof method for testing performance | |
| CN206002403U (en) | A kind of corrosion fatigue test apparatus based on fatigue machine | |
| CN114486641A (en) | Magnetic slurry crack grouting and filling experimental device and method | |
| CN109267751B (en) | Structure for preventing concrete cracks from being generated and construction process | |
| CN209260588U (en) | A kind of Bridge Crack filling clamping device | |
| CN110031324A (en) | Duct pieces of shield tunnel seam waterproof performance test apparatus | |
| CN108868822B (en) | Intelligent grouting hole device for tunnel lining trolley | |
| CN103630677B (en) | Experimental device and method for testing grouting speed and filling degree of open joint repairing material | |
| CN207114545U (en) | For testing the experimental provision system of distress in concrete self-healing ability | |
| CN107576783B (en) | Asphalt cement shape memory performance testing method | |
| CN114414397A (en) | Test box for testing low-temperature mechanical performance of splicing fitting and test method thereof | |
| CN107044939A (en) | The experimental provision and method of evaluating cementing concrete slurry system activity self-reparing capability | |
| CN219890912U (en) | Multi-angle test fixture for bonding strength of concrete crack repair material | |
| CN205676354U (en) | The graphite powder in the bolt anchoring hole of a kind of bottom brick of molten tin bath fills pressurizing unit | |
| CN216377932U (en) | Testing device for grouting process of anchor rod at top of tunnel | |
| CN110230271A (en) | Bridge biased displacement post-reinforcing resets construction method |
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 |