WO2017084636A1 - Concrete-filled steel tube sleeper suitable for ballastless track - Google Patents
Concrete-filled steel tube sleeper suitable for ballastless track Download PDFInfo
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- WO2017084636A1 WO2017084636A1 PCT/CN2016/110229 CN2016110229W WO2017084636A1 WO 2017084636 A1 WO2017084636 A1 WO 2017084636A1 CN 2016110229 W CN2016110229 W CN 2016110229W WO 2017084636 A1 WO2017084636 A1 WO 2017084636A1
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- sleeper
- concrete
- filled steel
- filled
- ballastless track
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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
- E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
- E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
- E01B3/32—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement
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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
- E01B2204/00—Characteristics of the track and its foundations
Definitions
- the invention belongs to the field of ballastless track concrete sleepers, and more particularly to a steel tube concrete sleeper suitable for ballastless tracks.
- the function of the sleeper is mainly to provide the positioning of the embedded parts of the fasteners and the geometrical position of the track during the construction of the ballastless track bed.
- the rails are required to have good shape retention, and the deformation, bending and torsion resistance should be satisfied during manufacturing, storage, transportation and construction.
- the main structure of the ballastless track is guaranteed to meet the requirements of the concrete structure related durability requirements, and the traditional concrete long sleeper has been Gradually optimize the design of concrete sleeper blocks that are connected and positioned by truss reinforcement.
- the application of concrete sleepers in ballastless track mainly includes: (1) French Stdedf sleepers, whose sleeper connecting parts are made of angle steel; (2) German radar 2000, whose sleeper connecting parts are made of reinforced trusses or reinforcing bars, such as application Publication No. CN102277799A, a steel-reinforced mesh concrete sleeper disclosed in the patent document published on December 14, 2011, the disclosure of which is incorporated herein by reference. No. CN100443663C, a block type or multi-block sleeper disclosed in the patent document of December 17, 2008, and a manufacturing method thereof, the CRTS I type block type sleeper which is widely laid in the country is digested on the basis of the radar 2000 sleeper.
- Trapezoidal sleepers with steel pipes as connecting parts such as the authorized bulletin number CN1135279C, a type of trapezoidal sleeper and railway track disclosed in the patent document dated January 21, 2004; No. CN1099505C, a railway road disclosed in the patent document dated January 22, 2003 Rail ladder type rail sleeper steel pipe joints.
- Stdedf-type ballastless track adopts block type concrete sleepers, and the sleeper concrete blocks are connected by angle steel to increase stability.
- the sleeper production process is simple, but the sleeper uses angle steel. More, higher cost, poor resistance to deformation of the sleeper;
- Radar 2000 and CRTS type I block type truss truss are space welded structures of multiple straight chord bars and two wavy webs, which are cooled It is produced by rolling, straightening, bending and welding.
- the reinforced concrete truss is made of special equipment. The process is complicated and the equipment is expensive, which leads to high cost of the sleeper.
- Trapezoidal sleeper with steel pipe as the connecting component which mainly uses steel pipe to realize the connection of two longitudinal beams.
- the prepared sleeper is suitable for the ballasted track.
- Special treatment such as end leveling or the use of prestressed steel bars and reinforcing bars to achieve effective coupling of steel pipes and longitudinal beams and prevent rotation, the preparation process is complicated On-site construction is not possible.
- the present invention provides a concrete-filled steel tubular sleeper suitable for a ballastless track, wherein the concrete filled steel tube is applied in a concrete sleeper without ballast track, and the concrete filled steel tube is used as a connecting component of the sleeper block. It can effectively alleviate the deformation of concrete sleepers during storage and transportation; at the same time, it can realize the formation of concrete-filled steel tube while pouring the concrete blocks of sleepers, effectively increase the geometric shape retention ability of the sleepers, reduce the amount of steel bars, and improve the construction.
- the concrete end of the concrete-filled steel tube of the present invention does not need special treatment, and the hollow steel pipe can be directly placed in the manufacturing mold of the sleeper concrete block, so that the concrete tube sleeper can be formed and constructed.
- the steel pipe concrete sleeper of the present invention is particularly suitable for use in a ballastless track or the like.
- the present invention provides a steel tubular concrete sleeper suitable for a ballastless track, characterized in that it comprises two or more sleeper concrete blocks and a sleeper joint for connecting the above-mentioned sleeper concrete blocks, wherein:
- the sleeper concrete block has a block structure, which is poured from concrete; each of the sleepers The concrete block is provided with an embedded part for fixing the rail and a reinforcing mesh or stirrup for connecting the sleeper connecting piece, and the embedded part is used for ensuring reliable connection of the sleeper concrete block with the rail;
- the sleeper connector is composed of a plurality of hollow steel pipes horizontally disposed between two adjacent sleeper concrete blocks, and the hollow steel pipe and the sleeper are made during the on-site pouring of the sleeper concrete block
- the concrete block is poured into one body, and each hollow steel pipe is filled with concrete; in this way, the on-site construction of the steel pipe concrete sleeper is realized, and the workability of the steel pipe concrete sleeper is improved.
- the hollow steel pipe is preferably a circular hollow steel pipe.
- the hollow steel pipes are preferably two, which are distributed on both sides of the embedded part.
- the hollow steel pipe is preferably three, and the three hollow steel pipes are preferably arranged in such a manner that the center line of the cross section of the three hollow steel pipes constitutes a triangle.
- the side surface of the sleeper concrete block is provided with an inclination angle of 11:1 to 7:1, and the upper corners thereof are chamfered.
- the reinforcing mesh or stirrup is independently placed in the sleeper concrete block to increase the strength of the sleeper concrete block.
- the bending stiffness EI Z of the concrete-filled steel tubular sleeper is obtained by the following formula:
- F is the concentrated load applied to the middle of the concrete sleeper
- l is the bearing spacing in the loading model
- q is the uniform load generated by the self-weight of the concrete-filled steel tubular sleeper
- f is the maximum deflection displacement of the concrete sleeper under the load.
- the torsional stiffness GI P of the concrete-filled steel tubular sleeper is obtained by the following formula:
- T is the torque load applied to the sleeper concrete block (2)
- the unit length twist angle of the concrete sleeper under the torque load is the torque load applied to the sleeper concrete block (2).
- the concrete-filled steel tubular sleeper has a bending rigidity of 1145.3 kN/m 2 and a torsional rigidity of 61.7 kN ⁇ m 2 /rad.
- the present invention provides a concrete-filled steel tubular sleeper with a steel tube concrete instead of a steel truss on the basis of the existing ballastless track concrete sleepers, and the above technical solutions conceived by the present invention are related to the prior art. Compared with, it mainly has the following technical advantages:
- the invention applies the steel tube concrete in the concrete sleeper of the ballastless track, and uses the steel tube concrete as the connecting component of the sleeper block, which is more integral than the general combined reinforced truss connection, and can effectively alleviate the storage of the concrete sleeper.
- the geometric shape retention ability of the sleeper reduces the amount of steel bars and improves the workability. It can be directly constructed on site to meet the requirements of the bending and torsion resistance of the sleepers.
- the end of the concrete filled steel tube in the present invention does not need special treatment, and it is not necessary to provide prestressed steel bars in the concrete block of the sleeper, and the hollow steel pipe is directly placed in the manufacturing mold of the concrete structure of the sleeper, and is integrated with the concrete block of the sleeper. It can be used, the construction is convenient and fast, no special production equipment is needed, and the construction cost is low; and the concrete block of the pouring sleeper is basically symmetrical to the vertical axis of the rail, and the joint surface with the cast-in-place bed board is small, and the side of the concrete block of the sleeper is set to be certain.
- the slope of the slope and the upper corners of the concrete block of the sleeper are chamfered to facilitate the demoulding of the concrete sleeper block during the manufacturing process and reduce the stress concentration of the concrete.
- the concrete-filled steel tubular sleeper structure of the present invention has good bending and torsion resistance, and maintains the geometric position and capability, and The combination of the track bed board is good, and the stability of the track is strong; in addition, this The invention relates to a concrete-filled steel tubular sleeper which has the advantages of simple preparation process, low cost, reliable quality, flexible specifications, high precision and small error, and has high commercial promotion and application prospects.
- FIG. 1 is a schematic view of a concrete-filled steel tubular sleeper using three steel pipe concrete joints according to the present invention
- Figure 2 is a plan view of Figure 1;
- Figure 3 is a side cross-sectional view of Figure 1;
- Figure 4 is a schematic view of a concrete-filled steel tubular concrete sleeper according to the present invention.
- Figure 5 is a plan view of Figure 4.
- Figure 6 is a side cross-sectional view of Figure 4.
- Figure 7 is a bending stiffness loading mode of a double steel tube concrete sleeper
- Figure 8 is a twisting stiffness loading mode of a double steel tube concrete sleeper
- Figure 9 is a schematic view of a multi-tube concrete sleeper.
- a concrete-filled steel tubular sleeper suitable for ballastless track comprises two sleeper concrete blocks 2 and a sleeper joint 3 (ie, concrete filled steel tube) for connecting two sleeper concrete blocks 2, two
- the sleeper concrete block 2 has a block structure, which is casted by concrete; the two sleeper concrete blocks 2 are provided with embedded parts 5 for fixing the rails 1, and the embedded parts 5 make each of the sleeper concrete blocks 2 symmetrical On the vertical axis of the rail 1 mounted thereon, and to ensure that the sleeper concrete block 2 and the rail 1 are reliably connected by fasteners; the concrete filled steel tube is located between two adjacent sleeper concrete blocks 2 for use in the two sleepers
- the concrete blocks 2 are connected as a whole, wherein the concrete filled steel tube is horizontally arranged horizontally on two adjacent sleeper concrete blocks by using a plurality of hollow steel pipes In the manufacturing mold of 2, it is poured into the concrete block 2, and in the pouring process, each hollow steel pipe is filled with concrete, and the horizontal direction is perpendicular to the arrangement direction
- the upper surface of the sleeper concrete block 2 is not provided with inner and outer shoulders, which is convenient for the construction personnel to step on; the side of the sleeper concrete block 2 is inclined at a angle of 11:1 to 7:1, so as to be demoulded during manufacture, and the corners of the concrete block of the sleeper are
- the chamfering treatment is not only convenient for demoulding, but also prevents or reduces the stress concentration of the concrete of the surrounding road bed and reduces the crack of the concrete of the road bed;
- the steel mesh or stirrup 4 is arranged in the concrete block 2 of the sleeper, the steel mesh
- the sheets or stirrups 4 are independently placed in the sleeper concrete block 2 to increase the strength of the sleeper concrete block.
- the above-mentioned concrete-filled steel tubular sleepers are embedded in the cast-in-place concrete track bed after being prefabricated, and are one of the important components of the pillow-type ballastless track system.
- a concrete-filled steel tubular sleeper having three or more sleeper concrete blocks can be obtained by the present invention to facilitate application to various multi-track sections.
- any type of hollow tube such as a plastic hollow tube may be used instead of the hollow steel tube of the present invention, and only the strength, bending resistance and torsion resistance are required to meet the requirements.
- the present embodiment performs a bending and torsion resistance test of the concrete-filled steel tubular sleeper and the existing reinforced concrete truss sleeper.
- the bending stiffness of the concrete-filled steel tubular sleeper is better than that of the steel truss sleeper.
- the torsional stiffness comparison test is shown in Figure 8.
- the reinforced concrete truss sleepers and reinforced concrete sleepers are loaded in the same way.
- the middle part of the upper and lower surfaces of the left sleeper block is clamped by the splint and the right side is completely fixed.
- the following test is obtained through comparison test. result:
- T is the torque load applied to the concrete block on the other side when the concrete block on the side of the sleeper is fixed. It can be seen from the above model test that the torsional stiffness of the double-tube concrete sleeper is slightly smaller than that of the double-reinforced truss sleeper.
- the steel bars of the reinforced concrete truss sleepers and the reinforced concrete sleepers are compared with each other, and the steel for the single sleeper of the reinforced truss sleepers is 18.1 kg, and the single root of the concrete filled steel sleepers is obtained.
- the steel for the sleeper is 16.6kg, and the steel for the single sleeper of the concrete-filled steel tubular sleeper is smaller than the steel truss sleeper.
- the concrete-filled steel tubular sleeper of the present invention is superior to the reinforced concrete truss sleeper in bending rigidity and steel for a single sleeper, and the torsional rigidity is slightly smaller than that of the reinforced truss sleeper, so it has high theoretical value and commercial promotion prospect.
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Abstract
A concrete-filled steel tube sleeper suitable for a ballastless track comprises two or more sleeper concrete blocks (2) and sleeper connecting pieces (3) for connecting the sleeper concrete blocks (2). The sleeper concrete blocks (2) have blocky structures, are formed by pouring concrete, and are internally provided with embedded parts (5) used for fixing steel rails (1), and reinforcing steel mesh pieces or stirrups connected to the sleeper connecting pieces (3); the sleeper connecting pieces (3) are formed by a plurality of hollow steel tubes which are arranged between the sleeper concrete blocks (2) along the transverse direction; and in a pouring process of the sleeper concrete blocks (2), the hollow steel tubes are internally filled with concrete at the same time, such that concrete-filled steel tubes are formed, and the sleeper connecting pieces (3) and the sleeper concrete blocks (2) are further enabled to form a whole by pouring. When being applied to a concrete sleeper of a ballastless track, concrete-filled steel tubes are taken as sleeper block connecting pieces, and the concrete-filled steel tubes and sleeper concrete blocks (2) are molded into a whole, such that the geometry maintaining ability of the sleeper is effectively improved, and the steel consumption is reduced. The present invention has the advantages of being simple in preparation, high in constructability, and the like.
Description
本发明属于无砟轨道混凝土轨枕领域，更具体地，涉及一种适用于无砟轨道的钢管混凝土轨枕。The invention belongs to the field of ballastless track concrete sleepers, and more particularly to a steel tube concrete sleeper suitable for ballastless tracks.
在枕式无砟轨道***中，轨枕的功能主要是提供无砟轨道道床板施工过程中扣件预埋件定位及轨道几何形位的确定，一方面，为了保证道床板浇筑后轨道几何形位的正确及尽可能减少钢轨精调过程中扣件的调整量，要求轨枕具有良好的形位保持能力，并且在制造、存放、运输及施工过程中其变形量及抗弯、抗扭能力应满足相关要求；另一方面，为了有效控制预制混凝土轨枕和现浇道床板新老混凝土之间产生裂纹的宽度和数量，保证无砟轨道主体结构满足混凝土结构相关耐久性规定要求，传统混凝土长轨枕已经逐步优化设计为通过桁架钢筋连接、定位的混凝土轨枕块。In the pillow-type ballastless track system, the function of the sleeper is mainly to provide the positioning of the embedded parts of the fasteners and the geometrical position of the track during the construction of the ballastless track bed. On the one hand, in order to ensure the geometric shape of the track after the ballast plate is poured Correct and minimize the adjustment of the fasteners during the fine adjustment of the rails, the rails are required to have good shape retention, and the deformation, bending and torsion resistance should be satisfied during manufacturing, storage, transportation and construction. Relevant requirements; on the other hand, in order to effectively control the width and number of cracks generated between the precast concrete sleeper and the cast-in-situ bed new and old concrete, the main structure of the ballastless track is guaranteed to meet the requirements of the concrete structure related durability requirements, and the traditional concrete long sleeper has been Gradually optimize the design of concrete sleeper blocks that are connected and positioned by truss reinforcement.
目前，无砟轨道中混凝土轨枕应用较为广泛的主要包括：(1)法国的Stdedf轨枕，其轨枕连接部件采用角钢；(2)德国雷达2000，其轨枕连接部件采用钢筋桁架或加强杆，如申请公布号CN102277799A，申请公布日2011年12月14日的专利文献公开的一种钢筋焊接网混凝土轨枕；公开号CN101316964A，公开日2008年12月3日的专利文献公开的一种混凝土轨枕；授权公告号CN100443663C，授权公告日2008年12月17日的专利文献公开的一种块式或多块式轨枕及其制造方法，国内目前广泛铺设的CRTS Ⅰ型块式轨枕就是在雷达2000轨枕基础上消化、吸收、再创新形成的；(3)以钢管作为连接部件的梯形轨枕，如授权公告号CN1135279C，授权公告日2004年1月21日的专利文献公开的一种梯形轨枕和铁路轨道；授权公告号CN1099505C，授权公告日2003年1月22日的专利文献公开的一种铁路路
轨之梯架式轨枕额钢管连接件。At present, the application of concrete sleepers in ballastless track mainly includes: (1) French Stdedf sleepers, whose sleeper connecting parts are made of angle steel; (2) German radar 2000, whose sleeper connecting parts are made of reinforced trusses or reinforcing bars, such as application Publication No. CN102277799A, a steel-reinforced mesh concrete sleeper disclosed in the patent document published on December 14, 2011, the disclosure of which is incorporated herein by reference. No. CN100443663C, a block type or multi-block sleeper disclosed in the patent document of December 17, 2008, and a manufacturing method thereof, the CRTS I type block type sleeper which is widely laid in the country is digested on the basis of the radar 2000 sleeper. (3) Trapezoidal sleepers with steel pipes as connecting parts, such as the authorized bulletin number CN1135279C, a type of trapezoidal sleeper and railway track disclosed in the patent document dated January 21, 2004; No. CN1099505C, a railway road disclosed in the patent document dated January 22, 2003
Rail ladder type rail sleeper steel pipe joints.
然而，进一步研究表明，上述轨枕依然存在以下问题：(1)Stdedf型无砟轨道采用块式混凝土轨枕，轨枕混凝土块间用角钢连接，以增加稳定性，该轨枕生产工艺简单，但轨枕使用角钢较多，成本较高，轨枕抗变形能力差；(2)雷达2000和CRTS Ⅰ型块式轨枕钢筋桁架为多根直弦杆钢筋和两根波浪形腹杆钢筋的空间焊接结构，其经冷轧、调直、弯曲和焊接等工序生产而成，该钢筋桁架制作需采用专用设备，工艺复杂，设备贵，导致轨枕造价高，其波浪形腹杆波长调整困难，且耗时长，现场适应能力差；(3)以钢管作为连接部件的梯形轨枕，其主要是利用钢管实现两个纵向梁的连接，制备的轨枕适用于有砟轨道，在该轨枕的制备过程中，钢管的端部需进行特殊处理，如端部矫平或利用预应力钢筋及加强杆实现钢管与纵向梁的有效联结及防止回转，其制备工艺复杂，无法实现现场施工。However, further research shows that the above-mentioned sleepers still have the following problems: (1) Stdedf-type ballastless track adopts block type concrete sleepers, and the sleeper concrete blocks are connected by angle steel to increase stability. The sleeper production process is simple, but the sleeper uses angle steel. More, higher cost, poor resistance to deformation of the sleeper; (2) Radar 2000 and CRTS type I block type truss truss are space welded structures of multiple straight chord bars and two wavy webs, which are cooled It is produced by rolling, straightening, bending and welding. The reinforced concrete truss is made of special equipment. The process is complicated and the equipment is expensive, which leads to high cost of the sleeper. It is difficult to adjust the wavelength of the wavy web, and it takes a long time and adapts to the field. (3) Trapezoidal sleeper with steel pipe as the connecting component, which mainly uses steel pipe to realize the connection of two longitudinal beams. The prepared sleeper is suitable for the ballasted track. During the preparation of the sleeper, the end of the steel pipe needs to be carried out. Special treatment, such as end leveling or the use of prestressed steel bars and reinforcing bars to achieve effective coupling of steel pipes and longitudinal beams and prevent rotation, the preparation process is complicated On-site construction is not possible.
【发明内容】[Summary of the Invention]
针对现有技术的以上缺陷或改进需求，本发明提供了一种适用于无砟轨道的钢管混凝土轨枕，其中将钢管混凝土应用在无砟轨道混凝土轨枕中，用钢管混凝土作为轨枕块的连接部件，可有效缓解混凝土轨枕在存放、运输等过程中的变形；同时还通过在浇筑轨枕混凝土块的同时实现钢管混凝土的成形，有效增加了轨枕几何形位保持能力，减少了钢筋用量，提高了可施工性，满足轨枕抗弯扭能力的要求；此外，本发明的钢管混凝土端部无需做特殊处理，通过将空心钢管直接置于轨枕混凝土块的制造模具内，即可实现钢管混凝土轨枕的成形，施工方便快捷，因而本发明的钢管混凝土轨枕尤其适用于无砟轨道等场合。In view of the above defects or improvement requirements of the prior art, the present invention provides a concrete-filled steel tubular sleeper suitable for a ballastless track, wherein the concrete filled steel tube is applied in a concrete sleeper without ballast track, and the concrete filled steel tube is used as a connecting component of the sleeper block. It can effectively alleviate the deformation of concrete sleepers during storage and transportation; at the same time, it can realize the formation of concrete-filled steel tube while pouring the concrete blocks of sleepers, effectively increase the geometric shape retention ability of the sleepers, reduce the amount of steel bars, and improve the construction. To meet the requirements of the bending and torsion resistance of the sleeper; in addition, the concrete end of the concrete-filled steel tube of the present invention does not need special treatment, and the hollow steel pipe can be directly placed in the manufacturing mold of the sleeper concrete block, so that the concrete tube sleeper can be formed and constructed. The steel pipe concrete sleeper of the present invention is particularly suitable for use in a ballastless track or the like.
为实现上述目的，本发明提出了一种适用于无砟轨道的钢管混凝土轨枕，其特征在于，包括两个或两个以上轨枕混凝土块和用于连接上述轨枕混凝土块的轨枕连接件，其中：In order to achieve the above object, the present invention provides a steel tubular concrete sleeper suitable for a ballastless track, characterized in that it comprises two or more sleeper concrete blocks and a sleeper joint for connecting the above-mentioned sleeper concrete blocks, wherein:
所述轨枕混凝土块呈块状结构，其由混凝土浇筑而成；每个所述轨枕
混凝土块内均设置有用于固定钢轨的预埋件和用于连接所述轨枕连接件的钢筋网片或箍筋，该预埋件用于确保所述轨枕混凝土块与所述钢轨可靠连接；The sleeper concrete block has a block structure, which is poured from concrete; each of the sleepers
The concrete block is provided with an embedded part for fixing the rail and a reinforcing mesh or stirrup for connecting the sleeper connecting piece, and the embedded part is used for ensuring reliable connection of the sleeper concrete block with the rail;
所述轨枕连接件由多根水平布置在两个彼此相邻的所述轨枕混凝土块之间的空心钢管构成，在所述轨枕混凝土块的现场浇筑过程中，使得所述空心钢管与所述轨枕混凝土块浇筑为一体，并且保证每根空心钢管内均灌满混凝土；以此方式，实现所述钢管混凝土轨枕的现场施工，提高所述钢管混凝土轨枕的可施工性。The sleeper connector is composed of a plurality of hollow steel pipes horizontally disposed between two adjacent sleeper concrete blocks, and the hollow steel pipe and the sleeper are made during the on-site pouring of the sleeper concrete block The concrete block is poured into one body, and each hollow steel pipe is filled with concrete; in this way, the on-site construction of the steel pipe concrete sleeper is realized, and the workability of the steel pipe concrete sleeper is improved.
作为进一步优选的，所述空心钢管优选为圆形的空心钢管。As a further preferred, the hollow steel pipe is preferably a circular hollow steel pipe.
作为进一步优选的，所述空心钢管优选为两根，其分布在所述预埋件的两侧。As a further preferred, the hollow steel pipes are preferably two, which are distributed on both sides of the embedded part.
作为进一步优选的，所述空心钢管优选为三根，上述三根空心钢管优选以下述方式布置：所述三根空心钢管的横截面的圆心连线构成三角形。Further preferably, the hollow steel pipe is preferably three, and the three hollow steel pipes are preferably arranged in such a manner that the center line of the cross section of the three hollow steel pipes constitutes a triangle.
作为进一步优选的，所述轨枕混凝土块的侧面设有11:1～7:1的倾角，其上面的边角均进行倒角处理。Further preferably, the side surface of the sleeper concrete block is provided with an inclination angle of 11:1 to 7:1, and the upper corners thereof are chamfered.
作为进一步优选的，所述钢筋网片或箍筋独立的置于所述轨枕混凝土块内，以提高所述轨枕混凝土块的强度。As a further preferred, the reinforcing mesh or stirrup is independently placed in the sleeper concrete block to increase the strength of the sleeper concrete block.
作为进一步优选的，所述钢管混凝土轨枕的弯曲刚度EIZ采用如下计算公式获得：As a further preferred, the bending stiffness EI Z of the concrete-filled steel tubular sleeper is obtained by the following formula:
其中，F为外界施加在混凝土轨枕中部的集中载荷，l为加载模型中支座间距，q为钢管混凝土轨枕自重产生的均布荷载，f为载荷作用下混凝土轨枕的最大挠曲位移。Among them, F is the concentrated load applied to the middle of the concrete sleeper, l is the bearing spacing in the loading model, q is the uniform load generated by the self-weight of the concrete-filled steel tubular sleeper, and f is the maximum deflection displacement of the concrete sleeper under the load.
作为进一步优选的，所述钢管混凝土轨枕的扭转刚度GIP采用如下计算公式获得：
As a further preferred, the torsional stiffness GI P of the concrete-filled steel tubular sleeper is obtained by the following formula:
其中，T为施加在轨枕混凝土块(2)上的扭矩载荷，
为扭矩载荷作用下混凝土轨枕的单位长度扭转角。Where T is the torque load applied to the sleeper concrete block (2), The unit length twist angle of the concrete sleeper under the torque load.
作为进一步优选的，所述钢管混凝土轨枕的弯曲刚度为1145.3kN/m2，扭转刚度为61.7kN·m2/rad。As a further preferred, the concrete-filled steel tubular sleeper has a bending rigidity of 1145.3 kN/m 2 and a torsional rigidity of 61.7 kN·m 2 /rad.
总体而言，本发明在现有无砟轨道混凝土轨枕基础上，针对目前存在的问题，提出了用钢管混凝土取代钢筋桁架的钢管混凝土轨枕，通过本发明所构思的以上技术方案与现有技术相比，主要具备以下的技术优点：In general, the present invention provides a concrete-filled steel tubular sleeper with a steel tube concrete instead of a steel truss on the basis of the existing ballastless track concrete sleepers, and the above technical solutions conceived by the present invention are related to the prior art. Compared with, it mainly has the following technical advantages:
1.本发明将钢管混凝土应用在无砟轨道混凝土轨枕中，用钢管混凝土作为轨枕块的连接部件，与一般的组合式钢筋桁架连接相比，整体性更强，可有效缓解混凝土轨枕在存放、运输等过程中的变形；同时通过钢管混凝土与轨枕混凝土块的一体成型，即在浇筑轨枕混凝土块的同时实现钢管混凝土的成形，并将钢管混凝土设计成由多根空心钢管组成，有效的增加了轨枕几何形位保持能力，减少了钢筋用量，提高了可施工性，可在现场直接施工，满足轨枕抗弯扭能力的要求。1. The invention applies the steel tube concrete in the concrete sleeper of the ballastless track, and uses the steel tube concrete as the connecting component of the sleeper block, which is more integral than the general combined reinforced truss connection, and can effectively alleviate the storage of the concrete sleeper. Deformation during transportation; at the same time, through the integral molding of concrete filled steel tube and sleeper concrete block, that is, the concrete tube is formed while pouring the concrete block of the sleeper, and the concrete filled steel tube is composed of a plurality of hollow steel tubes, which effectively increases The geometric shape retention ability of the sleeper reduces the amount of steel bars and improves the workability. It can be directly constructed on site to meet the requirements of the bending and torsion resistance of the sleepers.
2.本发明中的钢管混凝土端部无需做特殊处理，也无需在轨枕混凝土块中设置预应力钢筋，只需将空心钢管直接置于轨枕混凝土块的制造模具内，与轨枕混凝土块浇筑为一体即可，施工方便快捷，无需采用专用的生产设备，工程造价低；且浇筑的轨枕混凝土块基本对称于钢轨竖轴线，与现浇道床板的结合面较小，同时轨枕混凝土块侧面设置成一定坡度的斜面，轨枕混凝土块上面边角均进行倒角处理，便于混凝土轨枕块在制造生产过程中的脱模及减少混凝土的应力集中。2. The end of the concrete filled steel tube in the present invention does not need special treatment, and it is not necessary to provide prestressed steel bars in the concrete block of the sleeper, and the hollow steel pipe is directly placed in the manufacturing mold of the concrete structure of the sleeper, and is integrated with the concrete block of the sleeper. It can be used, the construction is convenient and fast, no special production equipment is needed, and the construction cost is low; and the concrete block of the pouring sleeper is basically symmetrical to the vertical axis of the rail, and the joint surface with the cast-in-place bed board is small, and the side of the concrete block of the sleeper is set to be certain. The slope of the slope and the upper corners of the concrete block of the sleeper are chamfered to facilitate the demoulding of the concrete sleeper block during the manufacturing process and reduce the stress concentration of the concrete.
3.通过本发明的钢管混凝土轨枕与现有的钢筋桁架轨枕的抗弯、抗扭对比试验可知，本发明的钢管混凝土轨枕结构的抗弯、抗扭性能良好，保持几何形位能力强，与道床板的结合效果好，轨道的稳定性强；此外，本
发明的钢管混凝土轨枕具有制备工艺简单、成本低廉、质量可靠、规格灵活、精度高、误差小等优点，具有高的商业推广和应用前景。3. According to the bending and torsion resistance test of the concrete-filled steel tubular sleeper of the present invention and the existing reinforced concrete truss sleeper, the concrete-filled steel tubular sleeper structure of the present invention has good bending and torsion resistance, and maintains the geometric position and capability, and The combination of the track bed board is good, and the stability of the track is strong; in addition, this
The invention relates to a concrete-filled steel tubular sleeper which has the advantages of simple preparation process, low cost, reliable quality, flexible specifications, high precision and small error, and has high commercial promotion and application prospects.
图1是本发明采用三根钢管混凝土连接的钢管混凝土轨枕示意图；1 is a schematic view of a concrete-filled steel tubular sleeper using three steel pipe concrete joints according to the present invention;
图2是图1的俯视图；Figure 2 is a plan view of Figure 1;
图3是图1的侧面剖视图；Figure 3 is a side cross-sectional view of Figure 1;
图4是本发明的采用两根钢管混凝土连接钢管混凝土轨枕示意图；Figure 4 is a schematic view of a concrete-filled steel tubular concrete sleeper according to the present invention;
图5是图4的俯视图；Figure 5 is a plan view of Figure 4;
图6是图4的侧面剖视图；Figure 6 is a side cross-sectional view of Figure 4;
图7是双钢管混凝土轨枕弯曲刚度加载方式；Figure 7 is a bending stiffness loading mode of a double steel tube concrete sleeper;
图8是双钢管混凝土轨枕扭转刚度加载方式；Figure 8 is a twisting stiffness loading mode of a double steel tube concrete sleeper;
图9是多钢管混凝土轨枕示意图。Figure 9 is a schematic view of a multi-tube concrete sleeper.
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。此外，下面所描述的本发明各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Further, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.
如图1-6所示，一种适用于无砟轨道的钢管混凝土轨枕，包括两个轨枕混凝土块2和用于连接两个轨枕混凝土块2的轨枕连接件3(即钢管混凝土)，两个轨枕混凝土块2呈块状结构，其用混凝土浇筑而成；两个轨枕混凝土块2内均设置有用于固定钢轨1的预埋件5，该预埋件5使得每个轨枕混凝土块2均对称于安装在其上的钢轨1的竖轴线，并确保轨枕混凝土块2与钢轨1通过扣件可靠连接；钢管混凝土位于两个彼此相邻的轨枕混凝土块2之间，以用于将两个轨枕混凝土块2连接为一个整体，其中，钢管混凝土利用多根空心钢管水平横向布置于彼此相邻的两个轨枕混凝土块
2的制造模具内，与轨枕混凝土块2浇筑为一体，在浇筑过程中，同时在每根空心钢管内均灌满混凝土，上述横向与钢轨1的布置方向垂直，其中，钢管混凝土中的空心钢管优选为圆形的空心钢管，其也可为方形空心钢管，数量优选为两根或三根，并采用如下方式布置(如图3和6所示)：两根空心钢管位于预埋管件5左右两侧；三根空心钢管的横截面的圆心连线构成三角形，该横截面与钢轨1的布置方向垂直。通过采用上述结构的钢管混凝土，可有效增加轨枕几何形位保持能力，减少钢筋用量，提高可施工性，便于其在现场直接施工，但本发明中对空心钢管的数量不限于上述实施例的具体值，可以根据实际需要进行具体选择。轨枕混凝土块2上表面不设内、外侧挡肩，方便施工人员踩踏；轨枕混凝土块2的侧面设11:1～7:1的倾角，以便于制造时脱模，轨枕混凝土块上面的边角均进行倒角处理，不仅方便脱模，而且可防止或减小周围道床板混凝土的应力集中，减小道床板混凝土的裂纹；轨枕混凝土块2内设置钢筋网片或箍筋4，该钢筋网片或箍筋4独立的置于轨枕混凝土块2内，以提高轨枕混凝土块的强度。上述钢管混凝土轨枕预制后埋入现场浇筑的混凝土道床板中，是枕式无砟轨道***的重要组成部分之一。As shown in Figure 1-6, a concrete-filled steel tubular sleeper suitable for ballastless track comprises two sleeper concrete blocks 2 and a sleeper joint 3 (ie, concrete filled steel tube) for connecting two sleeper concrete blocks 2, two The sleeper concrete block 2 has a block structure, which is casted by concrete; the two sleeper concrete blocks 2 are provided with embedded parts 5 for fixing the rails 1, and the embedded parts 5 make each of the sleeper concrete blocks 2 symmetrical On the vertical axis of the rail 1 mounted thereon, and to ensure that the sleeper concrete block 2 and the rail 1 are reliably connected by fasteners; the concrete filled steel tube is located between two adjacent sleeper concrete blocks 2 for use in the two sleepers The concrete blocks 2 are connected as a whole, wherein the concrete filled steel tube is horizontally arranged horizontally on two adjacent sleeper concrete blocks by using a plurality of hollow steel pipes
In the manufacturing mold of 2, it is poured into the concrete block 2, and in the pouring process, each hollow steel pipe is filled with concrete, and the horizontal direction is perpendicular to the arrangement direction of the steel rail 1, wherein the hollow steel pipe in the concrete filled steel tube Preferably, it is a circular hollow steel pipe, which may also be a square hollow steel pipe, preferably two or three in number, and arranged in the following manner (as shown in FIGS. 3 and 6): two hollow steel pipes are located on the left and right sides of the embedded pipe fittings 5 Side; the center line of the cross section of the three hollow steel tubes constitutes a triangle which is perpendicular to the direction in which the rails 1 are arranged. By adopting the steel pipe concrete with the above structure, the geometric shape retaining ability of the sleeper can be effectively increased, the amount of reinforcing steel bars can be reduced, the workability can be improved, and the direct construction can be facilitated in the field, but the number of the hollow steel pipes in the present invention is not limited to the specific example of the above embodiment. Values can be selected according to actual needs. The upper surface of the sleeper concrete block 2 is not provided with inner and outer shoulders, which is convenient for the construction personnel to step on; the side of the sleeper concrete block 2 is inclined at a angle of 11:1 to 7:1, so as to be demoulded during manufacture, and the corners of the concrete block of the sleeper are The chamfering treatment is not only convenient for demoulding, but also prevents or reduces the stress concentration of the concrete of the surrounding road bed and reduces the crack of the concrete of the road bed; the steel mesh or stirrup 4 is arranged in the concrete block 2 of the sleeper, the steel mesh The sheets or stirrups 4 are independently placed in the sleeper concrete block 2 to increase the strength of the sleeper concrete block. The above-mentioned concrete-filled steel tubular sleepers are embedded in the cast-in-place concrete track bed after being prefabricated, and are one of the important components of the pillow-type ballastless track system.
此外，通过本发明还可获得具有三个及以上轨枕混凝土块的钢管混凝土轨枕(如图9所示)，以便于适用于各种多轨路段。另外，根据实际强度试验及强度需求，也可采用塑料空心管等任何形式的空心管替代本发明中的空心钢管，只需保证其强度、抗弯、抗扭性能满足要求即可。In addition, a concrete-filled steel tubular sleeper having three or more sleeper concrete blocks (shown in Figure 9) can be obtained by the present invention to facilitate application to various multi-track sections. In addition, according to the actual strength test and strength requirements, any type of hollow tube such as a plastic hollow tube may be used instead of the hollow steel tube of the present invention, and only the strength, bending resistance and torsion resistance are required to meet the requirements.
为了获得本发明钢筋混凝土轨枕的力学性能，本实施例进行钢管混凝土轨枕与现有钢筋桁架轨枕的抗弯、抗扭对比试验。In order to obtain the mechanical properties of the reinforced concrete sleeper of the present invention, the present embodiment performs a bending and torsion resistance test of the concrete-filled steel tubular sleeper and the existing reinforced concrete truss sleeper.
弯曲刚度对比试验如图7所示，模型中钢筋桁架轨枕和钢筋混凝土轨枕的加载方式相同，都是左右两端线状简支约束，通过对比试验得出如下试验结果：The bending stiffness comparison test is shown in Figure 7. In the model, the reinforced concrete truss sleepers and the reinforced concrete sleepers are loaded in the same way, and the left and right ends are simply supported. The following test results are obtained through comparison tests:
(1)钢筋桁架轨枕弯曲刚度
(1) Flexural rigidity of reinforced truss sleepers
①结构自重产生的均布荷载q＝938.1N/m1 Uniform load generated by the structure's own weight q=938.1N/m
②集中荷载：F＝1000N2 concentrated load: F = 1000N
③挠曲位移：f＝0.283mm3 deflection displacement: f=0.283mm
④模型中支座间距：l＝1.8m4 bearing spacing in the model: l = 1.8m
弯曲刚度：
Bending stiffness:
(2)钢管混凝土轨枕弯曲刚度(2) Bending stiffness of concrete-filled steel tubular sleepers
①结构自重产生的均布荷载q＝1140N/m1 Uniform load generated by the structure's own weight q=1140N/m
②集中荷载：F＝1000N2 concentrated load: F = 1000N
③挠曲位移：f＝0.172mm3 deflection displacement: f=0.172mm
④模型中支座间距：l＝1.5m4 bearing spacing in the model: l = 1.5m
弯曲刚度：
Bending stiffness:
通过上述模型试验结果可知钢管混凝土轨枕的弯曲刚度优于钢筋桁架轨枕的弯曲刚度。According to the above model test results, the bending stiffness of the concrete-filled steel tubular sleeper is better than that of the steel truss sleeper.
扭转刚度对比试验如图8所示，模型中钢筋桁架轨枕和钢筋混凝土轨枕的加载方式相同，左侧轨枕块上下表面中间区域用夹板夹住扭转，右侧完全固定，通过对比试验得出如下试验结果：The torsional stiffness comparison test is shown in Figure 8. The reinforced concrete truss sleepers and reinforced concrete sleepers are loaded in the same way. The middle part of the upper and lower surfaces of the left sleeper block is clamped by the splint and the right side is completely fixed. The following test is obtained through comparison test. result:
(1)钢筋桁架轨枕扭转刚度(1) Torsional rigidity of reinforced concrete truss sleepers
①扭矩荷载：T＝1000N·m1 Torque load: T=1000N·m
②单位长度扭转角：
2 unit length twist angle:
扭转刚度：
Torsional stiffness:
(2)钢管混凝土轨枕扭转刚度(2) Torsional stiffness of concrete-filled steel tubular sleepers
①扭矩荷载：T＝1000N·m1 Torque load: T=1000N·m
②单位长度扭转角：
2 unit length twist angle:
扭转刚度：
Torsional stiffness:
其中，T为当轨枕一侧混凝土块固定时施加在另一侧混凝土块上的扭矩载荷，通过上述模型试验可知双钢管混凝土轨枕扭转刚度略小于双钢筋桁架轨枕扭转刚度。Among them, T is the torque load applied to the concrete block on the other side when the concrete block on the side of the sleeper is fixed. It can be seen from the above model test that the torsional stiffness of the double-tube concrete sleeper is slightly smaller than that of the double-reinforced truss sleeper.
在本实施例中，还将钢筋桁架轨枕和钢筋混凝土轨枕的单根轨枕用钢量进行了对比，通过计算得出钢筋桁架轨枕的单根轨枕用钢量为18.1kg，钢管混凝土轨枕的单根轨枕用钢量为16.6kg，钢管混凝土轨枕的单根轨枕用钢量小于钢筋桁架轨枕。In the present embodiment, the steel bars of the reinforced concrete truss sleepers and the reinforced concrete sleepers are compared with each other, and the steel for the single sleeper of the reinforced truss sleepers is 18.1 kg, and the single root of the concrete filled steel sleepers is obtained. The steel for the sleeper is 16.6kg, and the steel for the single sleeper of the concrete-filled steel tubular sleeper is smaller than the steel truss sleeper.
综上所述，本发明的钢管混凝土轨枕在弯曲刚度、单根轨枕用钢量上均优于钢筋桁架轨枕，扭转刚度略小于钢筋桁架轨枕，因此具有很高的理论价值和商业推广前景。In summary, the concrete-filled steel tubular sleeper of the present invention is superior to the reinforced concrete truss sleeper in bending rigidity and steel for a single sleeper, and the torsional rigidity is slightly smaller than that of the reinforced truss sleeper, so it has high theoretical value and commercial promotion prospect.
本领域的技术人员容易理解，以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。
Those skilled in the art will appreciate that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention, All should be included in the scope of protection of the present invention.
Claims (9)
- 一种适用于无砟轨道的钢管混凝土轨枕，其特征在于，包括两个或两个以上轨枕混凝土块(2)和用于连接上述轨枕混凝土块(2)的轨枕连接件(3)，其中：A concrete-filled steel tubular sleeper suitable for ballastless track, characterized in that it comprises two or more sleeper concrete blocks (2) and a sleeper joint (3) for connecting the above-mentioned sleeper concrete block (2), wherein:所述轨枕混凝土块(2)呈块状结构，其由混凝土浇筑而成；每个所述轨枕混凝土块(2)内均设置有用于固定钢轨(1)的预埋件(5)和用于连接所述轨枕连接件(3)的钢筋网片或箍筋，该预埋件(5)用于确保所述轨枕混凝土块(2)与所述钢轨(1)可靠连接；The sleeper concrete block (2) has a block structure which is poured from concrete; each of the sleeper concrete blocks (2) is provided with an embedded part (5) for fixing the rail (1) and for Connecting a steel mesh or stirrup of the sleeper connector (3), the embedded member (5) for ensuring reliable connection of the sleeper concrete block (2) with the rail (1);所述轨枕连接件(3)由多根水平布置在两个彼此相邻的所述轨枕混凝土块(2)之间的空心钢管构成，在所述轨枕混凝土块(2)的现场浇筑过程中，使得所述空心钢管与所述轨枕混凝土块(2)浇筑为一体，并且保证每根空心钢管内均灌满混凝土；以此方式，实现所述钢管混凝土轨枕的现场施工，提高所述钢管混凝土轨枕的可施工性。The sleeper connector (3) is composed of a plurality of hollow steel tubes horizontally arranged between two adjacent sleeper concrete blocks (2), during the on-site pouring process of the sleeper concrete block (2) The hollow steel pipe is integrally formed with the sleeper concrete block (2), and each hollow steel pipe is filled with concrete; in this way, the on-site construction of the concrete-filled steel tubular sleeper is realized, and the concrete-filled steel tubular sleeper is improved. The constructability.
- 如权利要求1所述的适用于无砟轨道的钢管混凝土轨枕，其特征在于，所述空心钢管优选为圆形的空心钢管。A concrete-filled steel tubular sleeper suitable for a ballastless track according to claim 1, wherein said hollow steel pipe is preferably a circular hollow steel pipe.
- 如权利要求1或2所述的适用于无砟轨道的钢管混凝土轨枕，其特征在于，所述空心钢管优选为两根，其分布在所述预埋件(5)的两侧。A concrete-filled steel tubular sleeper suitable for a ballastless track according to claim 1 or 2, characterized in that the hollow steel pipes are preferably two, which are distributed on both sides of the embedded part (5).
- 如权利要求1或2所述的适用于无砟轨道的钢管混凝土轨枕，其特征在于，所述空心钢管优选为三根，上述三根空心钢管优选以下述方式布置：所述三根空心钢管的横截面的圆心连线构成三角形。A concrete-filled steel tubular sleeper suitable for a ballastless track according to claim 1 or 2, wherein the hollow steel pipe is preferably three, and the three hollow steel pipes are preferably arranged in the following manner: a cross section of the three hollow steel pipes The center line forms a triangle.
- 如权利要求4所述的适用于无砟轨道的钢管混凝土轨枕，其特征在于，所述轨枕混凝土块(2)的侧面设有11:1～7:1的倾角，其上面的边角均进行倒角处理。A concrete-filled steel tubular sleeper suitable for a ballastless track according to claim 4, wherein the side surface of the sleeper concrete block (2) is provided with an inclination angle of 11:1 to 7:1, and the upper corners thereof are performed. Chamfer processing.
- 如权利要求5所述的适用于无砟轨道的钢管混凝土轨枕，其特征在于，所述钢筋网片或箍筋独立的置于所述轨枕混凝土块(2)内，以提高所 述轨枕混凝土块(2)的强度。A concrete-filled steel tubular sleeper suitable for a ballastless track according to claim 5, wherein said steel mesh or stirrup is independently placed in said sleeper concrete block (2) to improve The strength of the sleeper concrete block (2).
- 如权利要求6所述的适用于无砟轨道的钢管混凝土轨枕，其特征在于，所述钢管混凝土轨枕的弯曲刚度EIZ采用如下计算公式获得：A concrete-filled steel tubular sleeper suitable for a ballastless track according to claim 6, wherein the bending rigidity EI Z of the concrete-filled steel tubular sleeper is obtained by the following formula:
其中，F为外界施加在混凝土轨枕中部的集中载荷，l为加载模型中支座间距，q为钢管混凝土轨枕自重产生的均布荷载，f为载荷作用下混凝土轨枕的最大挠曲位移。Among them, F is the concentrated load applied to the middle of the concrete sleeper, l is the bearing spacing in the loading model, q is the uniform load generated by the self-weight of the concrete-filled steel tubular sleeper, and f is the maximum deflection displacement of the concrete sleeper under the load. - 如权利要求7所述的适用于无砟轨道的钢管混凝土轨枕，其特征在于，所述钢管混凝土轨枕的扭转刚度GIP采用如下计算公式获得：A concrete-filled steel tubular sleeper suitable for a ballastless track according to claim 7, wherein the torsional rigidity GI P of the concrete-filled steel tubular sleeper is obtained by the following formula:
其中，T为施加在轨枕混凝土块(2)上的扭矩载荷，为扭矩载荷作用下混凝土轨枕的单位长度扭转角。Where T is the torque load applied to the sleeper concrete block (2),
The unit length twist angle of the concrete sleeper under the torque load. - 如权利要求7或8所述的适用于无砟轨道的钢管混凝土轨枕，其特征在于，所述钢管混凝土轨枕的弯曲刚度为1145.3kN/m2，扭转刚度为61.7kN·m2/rad。 A concrete-filled steel tubular sleeper suitable for a ballastless track according to claim 7 or 8, wherein the concrete-filled steel tubular sleeper has a bending rigidity of 1145.3 kN/m 2 and a torsional rigidity of 61.7 kN·m 2 /rad.
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| CN201510814742.2 | 2015-11-20 | ||
| CN201510814742.2A CN105463948B (en) | 2015-11-20 | 2015-11-20 | A kind of concrete filled steel tube sleeper suitable for non-fragment orbit |
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| CN110396878A (en) * | 2019-08-13 | 2019-11-01 | 长沙瀚鹏电子技术有限公司 | A kind of sleeper fastening installation vehicle |
| CN113011061A (en) * | 2021-03-04 | 2021-06-22 | 东华理工大学 | Method for measuring and calculating rigidity of built-in corrugated cylinder hollow floor |
| CN113010941A (en) * | 2021-02-25 | 2021-06-22 | 东华理工大学 | Mechanical analysis measuring and calculating method for built-in thin-wall corrugated cylinder hollow floor |
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| CN105463948B (en) * | 2015-11-20 | 2017-10-27 | 中铁第四勘察设计院集团有限公司 | A kind of concrete filled steel tube sleeper suitable for non-fragment orbit |
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| CN113010941B (en) * | 2021-02-25 | 2023-05-12 | 衢州学院 | Mechanical analysis and calculation method for hollow floor system with built-in thin-wall corrugated cylinder |
| CN113011061A (en) * | 2021-03-04 | 2021-06-22 | 东华理工大学 | Method for measuring and calculating rigidity of built-in corrugated cylinder hollow floor |
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| CN105463948A (en) | 2016-04-06 |
| CN105463948B (en) | 2017-10-27 |
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