CN111304981B - Urban rail side passage construction support device and use method - Google Patents
Urban rail side passage construction support device and use method Download PDFInfo
- Publication number
- CN111304981B CN111304981B CN202010179992.4A CN202010179992A CN111304981B CN 111304981 B CN111304981 B CN 111304981B CN 202010179992 A CN202010179992 A CN 202010179992A CN 111304981 B CN111304981 B CN 111304981B
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- sleeve assembly
- outer sleeve
- support device
- transmission
- supporting
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/40—Means or arrangements for temporarily supporting laid tracks, or rails or sleepers in the track
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2201/00—Fastening or restraining methods
- E01B2201/04—Fastening or restraining methods by bolting, nailing or the like
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
本发明涉及轨道施工技术领域，具体来说是一种城市轨道旁通道施工支护装置及使用方法，包括内滑套总成以及外套管总成，外套管总成的两端分别套设于两个内滑套总成的内端外侧，且两个内滑套总成的传动丝杠近于第一传动伞齿轮的一端分别设有与第一传动伞齿轮相啮合的第二传动伞齿轮。本发明所提供的一种城市轨道旁通道施工支护装置，组合结构简单可行，易于安装与拆卸，采用模块化设计，体积小，安装方便，能有效提高施工效率；各部件定型加工可作为周转物资重复利用，节省施工材料；通过小型悬臂起重机吊装支护装置，可大大降低劳动强度；采用可调式结构，方便调整支护装置状态，方便搬运，节省用工成本；使用时无需依赖外部电源，适用性高。
The present invention relates to the field of track construction technology, specifically, a construction support device for a side channel of an urban track and a method of use, comprising an inner sleeve assembly and an outer sleeve assembly, the two ends of the outer sleeve assembly are respectively sleeved on the outer sides of the inner ends of the two inner sleeve assemblies, and the transmission screws of the two inner sleeve assemblies are respectively provided with a second transmission bevel gear meshing with the first transmission bevel gear at one end thereof close to the first transmission bevel gear. The construction support device for a side channel of an urban track provided by the present invention has a simple and feasible combined structure, is easy to install and disassemble, adopts a modular design, is small in size, is easy to install, and can effectively improve construction efficiency; each component is finalized and processed and can be reused as a turnover material, saving construction materials; the support device can be hoisted by a small cantilever crane, which can greatly reduce labor intensity; an adjustable structure is adopted, which is convenient for adjusting the state of the support device, convenient for transportation, and saving labor costs; it does not need to rely on an external power supply when in use, and has high applicability.
Description
Technical Field
The invention relates to the technical field of track construction, in particular to a construction supporting device for an urban track bypass and a use method thereof.
Background
In the domestic subway track laying construction, a temporary transition method is needed to be used for construction of a front and rear 25m section which is not completed or is not stable in settlement in a connecting passage between underground line shield sections, and temporary transition track panels are mainly erected by temporary buttresses and section steel. And when the structural settlement is stable and meets the requirements, removing the temporary transition track panel, cleaning the track bed, re-measuring, adjusting the line, and then carrying out integral track bed construction of the section.
(1) The temporary transition is carried out by adopting a temporary support pier transition method, a temporary support pier is required to be poured under each short sleeper and a screw rod is laterally supported, one end of the screw rod is propped against the rail web at the outer side of the steel rail, and the other end of the screw rod is propped against the side wall. The distance between the screw rods is 5m (the curve section is increased), and the steel rail is connected with the track center on the same section of the screw rods by using a track gauge pull rod. The pouring and dismantling of the buttress consume large amount of manpower and building materials, and the construction efficiency is low.
(2) The method for transition of the section steel is adopted for temporary transition, the section steel with proper length is required to be arranged at each 1.5 m, the supporting and carrying processes of the section steel are all completed manually, the labor intensity is high, the construction efficiency is low, the material loss is serious only when the section steel needs to be cut in the disassembly process due to the narrow space, the section steel is not provided with a supporting device in the middle part, and the section steel is easy to deform when a rail car passes through, so that a large potential safety hazard is caused.
The problem of supporting the bypass channel in subway track construction is a key point for limiting the whole construction progress, and a great amount of funds and manpower resources are input for ensuring the construction progress requirement project, and the potential safety hazard is outstanding. The existing temporary support construction of the track connecting channel has the defects of low efficiency, more labor investment, low mechanization degree, high cost, serious material loss and the like. Therefore, a modularized and mechanized construction device is developed, and the construction efficiency of support is high; the development and application of the bypass supporting construction equipment need to have great influence on the existing track construction method.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides a construction supporting device for an urban railway bypass and a use method thereof.
In order to achieve the above object, there is provided an urban rail bypass construction support device comprising: the inner sliding sleeve assembly is connected with a first supporting screw in a matched mode, the height of the inner sliding sleeve assembly can be changed through rotation of the first supporting screw, the outer end of the inner sliding sleeve assembly is provided with a supporting part, and the inner end of the inner sliding sleeve assembly is connected with a transmission screw in a matched mode; the outer sleeve assembly is internally provided with a cavity, one side of the outer sleeve assembly is connected with a transmission shaft head, the outer end of the transmission shaft head is positioned outside the outer sleeve assembly to be connected with a driving mechanism, the inner end of the transmission shaft head is provided with a first transmission bevel gear positioned in the cavity of the outer sleeve assembly, and the upper side of the outer sleeve assembly is also symmetrically provided with a containing groove for clamping a steel rail; the two ends of the outer sleeve assembly are respectively sleeved outside the inner ends of the two inner sleeve assemblies, and one ends, close to the first transmission bevel gears, of the transmission screw rods of the two inner sleeve assemblies are respectively provided with a second transmission bevel gear meshed with the first transmission bevel gears.
Preferably, the inner sliding sleeve assembly comprises an inner sliding sleeve square tube, one end of the inner sliding sleeve square tube, which is far away from the outer sleeve assembly, is provided with an end plate to serve as a supporting part, one end of the inner sliding sleeve square tube, which is close to the outer sleeve assembly, is provided with a nut baffle, the nut baffle is provided with a transmission nut, and the transmission nut is matched and connected with the transmission screw.
Preferably, the upper side and the lower side of the square tube of the inner sliding sleeve are correspondingly provided with supporting holes, filament nuts are arranged in the supporting holes, and the filament nuts are used for being connected with the first supporting screw in a matched mode.
Preferably, the outer end surface of the supporting part is an inclined surface or an arc surface.
Preferably, the outer sleeve assembly comprises an outer sleeve square tube, a connecting hole is formed in the front side or the rear side of the middle of the outer sleeve square tube, a transmission shaft head stretches into the outer sleeve square tube, and a baffle ring is arranged at the connecting hole to limit the inner end of the transmission shaft head to the inner side of the baffle ring.
Preferably, an opening is arranged on the upper side of the middle part of the outer sleeve square tube, and an upper cover plate is detachably connected to the opening.
Preferably, the middle part of the outer sleeve square tube is also symmetrically provided with a screw positioning plate, the middle part of the screw positioning plate is provided with a through hole for a transmission screw to pass through, and a thrust bearing is also arranged between the transmission screw and the outer sleeve square tube.
Preferably, the outer sleeve assembly is connected with a second supporting screw rod in a matched mode, and the height of the outer sleeve assembly can be changed through rotation of the second supporting screw rod.
The invention also relates to a use method of the urban rail bypass construction supporting device, after the steel rail is spread in place, one end of the steel rail is connected with the positive line rail, the middle is temporarily supported by a track jack, and at the moment, the steel rail is supported by the urban rail bypass construction supporting device, which comprises the following steps:
and a, hoisting the supporting device below the steel rail, and rotating the supporting device to enable the supporting device to vertically cross the steel rail, so that the lower bottom surface of the steel rail is tightly attached in the accommodating groove.
And b, lifting the steel rail to the standard elevation through the first supporting screw rod and the second supporting screw rod.
And c, enabling the propping part at the outer end of the inner sliding sleeve assembly to be tightly attached to the pipe wall by rotating the transmission shaft head.
Preferably, the construction supporting device is carried and transported by a flat car, and the construction supporting device is hoisted by a cantilever crane carried on the flat car.
Advantageous effects of the invention
The urban rail bypass construction support device provided by the invention has the advantages that the urban rail bypass construction support device comprises, but is not limited to: compared with the prior art, the urban rail bypass construction support device provided by the invention has the advantages that the combined structure is simple and feasible, the installation and the disassembly are easy, the modular design is adopted, the volume is small, the installation is convenient, and the construction efficiency can be effectively improved; the shaping processing of each part can be used as turnover materials for recycling, so that construction materials are saved; the supporting device is hoisted by the small cantilever crane, so that the labor intensity can be greatly reduced; the adjustable structure is adopted, so that the state of the supporting device is convenient to adjust, the carrying is convenient, and the labor cost is saved; when in use, the external power supply is not needed, the applicability is high.
Drawings
Fig. 1 is a schematic structural view of a bypass supporting device in an embodiment.
Fig. 2 is a schematic structural diagram of an inner sliding sleeve assembly in an embodiment.
FIG. 3a is a schematic structural view of an outer sleeve assembly according to an embodiment.
Fig. 3b is a cross-sectional view taken along A-A of fig. 3 a.
Fig. 4 is a schematic illustration of a portion of a transmission structure in an embodiment.
Fig. 5 is a schematic view of construction in an embodiment.
In the figure: 1-1 parts of an inner sliding sleeve assembly, 1-3 parts of a first supporting screw rod, 1-4 parts of an outer sleeve assembly, 1-5 parts of a second supporting screw rod, 2-1 parts of a transmission assembly, 2-2 parts of an inner sliding sleeve square tube, 2-3 parts of an end plate, 2-4 parts of a long screw nut, 2-5 parts of a supporting hole, 2-6 parts of a screw nut baffle plate, 3-1 parts of a transmission screw nut, 3-2 parts of an outer sleeve square tube, 3-3 parts of a positioning plate, 3-4 parts of a lifting ring, 3-5 parts of an upper cover plate, 3-6 parts of a cover plate bolt, 3-7 parts of a baffle ring, 3-8 parts of a baffle ring bolt, 3-9 parts of a side slat 3-10 parts of a screw positioning plate, 3-11 parts of a thrust bearing, 3-12 parts of a stop block 4-1 parts of a screw 4-2 parts of a second transmission bevel gear 4-3 parts of a first transmission bevel gear 4-4 parts of a transmission shaft head 5-1 parts of a pipe wall 5-2 parts of a side channel support device 5-3 parts of a positive track bed 5-4 parts of a small cantilever crane.
Detailed Description
The construction and principles of such apparatus and methods will be apparent to those skilled in the art from the following description of the invention taken in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the present embodiment provides an urban railway bypass construction support device, which includes an inner sleeve assembly and an outer sleeve assembly, wherein the inner sleeve assembly is cooperatively connected with a first supporting screw, the height of the inner sleeve assembly can be changed by the rotation of the first supporting screw, the outer end of the inner sleeve assembly is provided with a supporting part, and the inner end of the inner sleeve assembly is cooperatively connected with a transmission screw; the outer sleeve assembly in be equipped with the cavity, just outer sleeve assembly one side be connected with the drive spindle nose, the outer end of drive spindle nose is located outer sleeve assembly in order to link to each other with actuating mechanism, the inner of drive spindle nose is equipped with the first transmission bevel gear that is located the cavity of outer sleeve assembly, the upside of outer sleeve assembly still bilateral symmetry be equipped with the accommodation recess that is used for the joint rail.
The two ends of the outer sleeve assembly are respectively sleeved outside the inner ends of the two inner sleeve assemblies, and one ends, close to the first transmission bevel gears, of the transmission screw rods of the two inner sleeve assemblies are respectively provided with a second transmission bevel gear meshed with the first transmission bevel gears.
Referring to fig. 2, the inner sleeve assembly may include an inner sleeve square tube, an end plate, a filament nut, a support hole, a nut baffle, and a transmission nut. Each supporting device is provided with two groups of inner sliding sleeve assemblies, and the two sides of the outer sliding sleeve assemblies are driven to stretch towards two sides through transmission screw rods. One end of the inner sliding sleeve square tube far away from the outer sleeve assembly is welded with an end plate to serve as a supporting part, one end of the inner sliding sleeve square tube close to the outer sleeve assembly is welded with a nut baffle, an opening is formed in the nut baffle, a transmission nut is welded at the opening, and the transmission nut is in threaded fit with the transmission screw to realize fit connection. Simultaneously, the upper and lower both sides of interior slip cap side pipe are corresponding to be equipped with the supporting hole, and the welding has the long screw in the supporting hole, and long screw and first support lead screw match with the screw thread in order to realize the cooperation and connect. In a preferred embodiment, the outer end surface of the abutting portion is an inclined surface or an arc surface so as to abut against the wall of the shield pipe, for example, an inclined surface gradually inclined outwards from bottom to top.
Referring to fig. 3a and 3b, the outer sleeve assembly may include an outer sleeve square tube, a locating plate, a lifting ring, an upper cover plate, a screw, a cover plate bolt, a retainer ring locating bolt, a side slat, a screw locating plate, a thrust bearing, a stop block, and the like. Two positioning plates are symmetrically welded on the upper side of the outer sleeve square tube left and right respectively, so that a left-right symmetrical accommodating groove is formed on the upper side of the outer sleeve square tube to play a role in positioning the steel rail. The front side or the rear side at the middle part of the outer sleeve square tube is provided with a connecting hole for the transmission shaft head to extend into the outer sleeve square tube, a baffle ring is arranged at the connecting hole, the baffle ring is of a semicircular structure for positioning the transmission shaft head, the two semicircular baffle rings are spliced and are connected outside the connecting hole through bolts, two sections of annular extension sections are arranged at the inner end of the transmission shaft head at intervals, the inner end of the transmission shaft head extends into the outer sleeve square tube through the connecting hole, the two sections of annular extension sections are respectively positioned at the inner side and the outer side of the connecting hole, the baffle ring is connected outside the connecting hole so as to limit the inner end of the transmission shaft head to the inner side of the baffle ring, and a rotating bearing can be further arranged between the baffle ring and the transmission shaft head so as to further ensure the limit of the rotation shaft head.
In a preferred embodiment, the upper side of the outer sleeve square tube can also be welded with a lifting ring, and the lifting ring is a lifting device arranged for convenient transportation. In addition, an opening is formed in the upper side of the middle of the outer sleeve square tube, an upper cover plate is detachably connected to the opening through a bolt so as to facilitate the detection of faults of a transmission part, side strips are welded in the outer sleeve square tube and used for positioning the upper cover plate at a vertical position, stop blocks welded on the outer sleeve square tube are arranged on two sides of the opening, and the upper cover plate is detachably connected with the stop blocks through the bolt so as to realize the detachable connection with the outer sleeve square tube; the middle part of the outer sleeve square tube is also welded with a screw locating plate in bilateral symmetry, a through hole is formed in the middle of the screw locating plate for the transmission screw to pass through, so that the effect of locating the transmission screw is achieved, and a thrust bearing can be arranged between the transmission screw and the outer sleeve square tube, so that transverse friction force is reduced. And the outer sleeve assembly can also be connected with a second supporting screw rod in a matched mode in the same way as the inner sleeve assembly, the height of the outer sleeve assembly can be changed through rotation of the second supporting screw rod, and the diameter of the second supporting screw rod can be smaller than that of the first supporting screw rod.
In combination with fig. 4, the transmission assembly is formed by the transmission screw, the first transmission bevel gear, the second transmission bevel gear and the transmission shaft head, the first transmission bevel gear is driven to rotate by rotating the transmission shaft head, then the first transmission bevel gear drives the second transmission bevel gear to rotate, the second transmission bevel gear drives two transmission screws which are arranged in bilateral symmetry to rotate, the transmission screw is installed at the inner end of the inner sliding sleeve structure, and the inner sliding sleeve assembly is driven to stretch towards two ends by rotating the transmission screw. Wherein the first transmission bevel gear is a pinion gear and the second transmission bevel gear is a bull gear, thereby a larger transmission ratio can be obtained.
In a preferred embodiment, the first support screw and the second support screw of the support device are trapezoidal threads, the end parts of the first support screw and the second support screw are of an outer hexagonal structure, and the screw can be easily rotated by a spanner to adjust the height of the support device. The internal transmission structure is used for conveniently adjusting the inner sliding sleeves at the two ends to stretch towards the two sides, so that the time for manually adjusting the bracket can be saved, and the transmission screw rod also adopts an outer hexagonal structure form.
As shown in fig. 5, the present embodiment is constructed by modularizing the support device, using the existing construction vehicle as a transport platform, and the boom crane is mounted on the transport platform, and the support device is safely and quickly transported to the construction work surface by a small-sized boom crane. The supporting device is enabled to reach the standard elevation of the steel rail through the first supporting screw rod and the second supporting screw rod, the steel rail is placed in the accommodating groove, the transmission shaft head is rotated to drive the inner sliding sleeve assembly to extend towards two sides, and when the end plates at two sides are tightly attached to the pipe wall, the supporting is completed.
Embodiment one: supporting construction step of bypass supporting device
1. The supporting device is carried on the track flat car and is transported to a construction site.
2. The steel rail is spread in place in a scattered way, one end of the steel rail is connected with the positive line rail, and the middle is temporarily supported by a track lifting machine.
3. The supporting device is hoisted below the steel rail by a cantilever crane carried on the flat car.
4. The supporting device is rotated to vertically cross the steel rail, so that the lower bottom surface of the steel rail is tightly attached in the baffle.
5. Penetrating a first supporting screw rod and a second supporting screw rod, and lifting the steel rail to a reference elevation.
6. The supporting part at the outer end of the inner sliding sleeve assembly is tightly attached to the pipe wall by rotating the transmission shaft head.
7. The cantilever crane releases the hanging ring to fix the steel rail.
8. The flat plate of the railway car moves forward to enter the next supporting process
Embodiment two: the bypass supporting device is disassembled and constructed
1. The track flat car carries the cantilever crane to travel to the construction site, and is disassembled after being withdrawn from one end.
2. And installing a hanging ring.
3. And the transmission shaft head is rotated, so that the inner sliding sleeve assembly is retracted into the outer sleeve assembly.
4. And removing the first support screw and the second support screw.
5. And hoisting the supporting device to the flat car.
6. And moving the flat car to enter the next disassembly process.
Claims (10)
1. The utility model provides a city track bypass construction strutting arrangement which characterized in that includes:
The inner sliding sleeve assembly is connected with a first supporting screw in a matched mode, the height of the inner sliding sleeve assembly can be changed through rotation of the first supporting screw, the outer end of the inner sliding sleeve assembly is provided with a supporting part, and the inner end of the inner sliding sleeve assembly is connected with a transmission screw in a matched mode; and
The outer sleeve assembly is internally provided with a cavity, one side of the outer sleeve assembly is connected with a transmission shaft head, the outer end of the transmission shaft head is positioned outside the outer sleeve assembly to be connected with a driving mechanism, the inner end of the transmission shaft head is provided with a first transmission bevel gear positioned in the cavity of the outer sleeve assembly, and the upper side of the outer sleeve assembly is also symmetrically provided with accommodating grooves for clamping steel rails;
The two ends of the outer sleeve assembly are respectively sleeved outside the inner ends of the two inner sleeve assemblies, and one ends, close to the first transmission bevel gears, of the transmission screw rods of the two inner sleeve assemblies are respectively provided with a second transmission bevel gear meshed with the first transmission bevel gears.
2. The urban rail bypass construction support device according to claim 1, wherein the inner sleeve assembly comprises an inner sleeve square tube, an end plate is arranged at one end of the inner sleeve square tube far away from the outer sleeve assembly to serve as a supporting part, a nut baffle is arranged at one end of the inner sleeve square tube close to the outer sleeve assembly, a transmission nut is arranged on the nut baffle, and the transmission nut is connected with the transmission screw in a matched manner.
3. The urban rail bypass channel construction support device according to claim 2, wherein the upper side and the lower side of the square tube of the inner sliding sleeve are correspondingly provided with support holes, and filament nuts are arranged in the support holes and are used for being connected with the first support screw in a matched manner.
4. The urban rail bypass construction support device according to claim 1, wherein the outer end surface of the supporting portion is an inclined surface or an arc surface.
5. The urban rail bypass construction support device according to claim 1, wherein the outer sleeve assembly comprises an outer sleeve square tube, a connecting hole is formed in the front side or the rear side of the middle of the outer sleeve square tube for the transmission shaft head to extend into the outer sleeve square tube, and a baffle ring is arranged at the connecting hole to limit the inner end of the transmission shaft head to the inner side of the baffle ring.
6. The urban rail bypass construction support device according to claim 5, wherein an opening is formed in the upper side of the middle portion of the outer sleeve square tube, and an upper cover plate is detachably connected to the opening.
7. The urban rail bypass channel construction support device according to claim 5, wherein the middle part of the outer sleeve square tube is provided with a screw positioning plate symmetrically left and right, the middle part of the screw positioning plate is provided with a through hole for a transmission screw to pass through, and a thrust bearing is arranged between the transmission screw and the outer sleeve square tube.
8. The urban rail bypass construction support device according to claim 1, wherein the outer sleeve assembly is connected with a second supporting screw rod in a matched manner, and the height of the outer sleeve assembly can be changed by rotating the second supporting screw rod.
9. The method of using the urban rail bypass construction support device according to claim 8, wherein after the steel rail is spread in place, one end of the steel rail is connected with the positive line rail, the middle is temporarily supported by a track jack, and the steel rail is supported by the urban rail bypass construction support device at this time, comprising the steps of:
Step a, hoisting the supporting device below the steel rail, and rotating the supporting device to enable the supporting device to vertically cross the steel rail, so that the lower bottom surface of the steel rail is tightly attached in the accommodating groove;
Step b, lifting the steel rail to a reference elevation through a first supporting screw rod and a second supporting screw rod;
And c, enabling the propping part at the outer end of the inner sliding sleeve assembly to be tightly attached to the pipe wall by rotating the transmission shaft head.
10. The method of using the urban rail bypass construction support device according to claim 9, wherein the construction support device is carried and transported by a flat car, and the construction support device is hoisted by a cantilever crane carried on the flat car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010179992.4A CN111304981B (en) | 2020-03-16 | 2020-03-16 | Urban rail side passage construction support device and use method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010179992.4A CN111304981B (en) | 2020-03-16 | 2020-03-16 | Urban rail side passage construction support device and use method |
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| CN111304981A CN111304981A (en) | 2020-06-19 |
| CN111304981B true CN111304981B (en) | 2024-11-12 |
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| CN113512909A (en) * | 2021-05-25 | 2021-10-19 | 中铁上海工程局集团(苏州)轨道交通科技研究院有限公司 | A pull-out tube type adjustable communication channel transition support system and support method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212128692U (en) * | 2020-03-16 | 2020-12-11 | 中铁上海工程局集团有限公司 | Urban rail by-pass construction supporting device |
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| CN202881780U (en) * | 2012-11-15 | 2013-04-17 | 中铁五局(集团)有限公司城市轨道交通工程分公司 | Temporary sleeper for tunnel shield construction |
| CN104674616A (en) * | 2013-11-28 | 2015-06-03 | 中铁十四局集团有限公司 | Gauge supporting rod for ballastless track construction |
| CN204491336U (en) * | 2015-02-09 | 2015-07-22 | 老河口市启星机械制造有限公司 | Ground rail mounting rail row bracing frame |
| JP6644657B2 (en) * | 2016-09-13 | 2020-02-12 | 株式会社大林組 | Temporary sleepers for shield tunnel construction |
| CN110055835B (en) * | 2019-04-17 | 2024-12-24 | 中铁上海工程局集团有限公司 | Temporary transition device and construction method for subway track laying side passage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212128692U (en) * | 2020-03-16 | 2020-12-11 | 中铁上海工程局集团有限公司 | Urban rail by-pass construction supporting device |
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