Trapezoidal sleeper track limited by limiting pins and provided with auxiliary long sleepers and construction method of trapezoidal sleeper track

Abstract

The invention discloses a trapezoidal sleeper track provided with auxiliary long sleepers and limited by limiting pins and a construction method of the trapezoidal sleeper track. The sleeper track adopts a limiting mode of the limiting pins. The rail comprises a novel trapezoidal sleeper structure, auxiliary long sleepers are arranged below anti-vibration pads respectively, the auxiliary long sleepers and bases of trapezoidal sleepers are poured into a whole, pre-embedded limiting pins are arranged on the auxiliary sleepers, and longitudinal and transverse limiting of the trapezoidal sleepers is achieved through interaction of the limiting pins on the auxiliary sleepers and preformed holes in the trapezoidal sleepers; according to the scheme, the problems that in the prior art, empty hoisting and hard-to-hard collision of trapezoid sleepers can be possibly generated can be solved, and the dependency of trapezoid sleeper tracks on construction is reduced; the limiting surface acting with the trapezoidal sleeper anti-vibration pad can be monitored more comprehensively, and inspection and overhaul are facilitated; the width of the trapezoidal sleeper track is reduced, the occupied line space and the material consumption are reduced, and the purposes of energy conservation and emission reduction are achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rail transit, and particularly relates to a ladder-shaped sleeper track with auxiliary long sleepers and a limiting pin limiting method. BACKGROUND

[0002] The traditional ladder-shaped sleeper is a frame-type track structure composed of two prestressed concrete longitudinal beams, transverse connecting rods, damping pads and buffer pads. The lower side and the outer side of the longitudinal beam are respectively provided with damping pads and buffer pads, and the outer side of the longitudinal beam is provided with a limiting boss. The traditional ladder-shaped sleeper track is provided with an L-shaped track bed. The ladder-shaped sleeper realizes longitudinal limiting by the interaction between the limiting boss buffer pad and the track bed stop, and realizes transverse limiting by the interaction between the outer side buffer pad of the longitudinal beam and the stop. However, the limiting boss structure leads to a large space occupation of the traditional ladder-shaped sleeper, especially in the space-limited areas such as tunnels, and the buffer and damping structure at the limiting boss is prone to damage and difficult to repair and replace.

[0003] The traditional ladder-shaped sleeper construction needs to first erect the track frame above the steel reinforcement cage, and then pour the concrete support. In this process, the ladder-shaped sleeper needs to be isolated from the surrounding concrete by using isolation materials and wrapping sleeves to prevent the ladder-shaped sleeper from adhering to the cast-in-place concrete. However, in the construction process, the operation of the site workers is inevitably not fine enough, and it cannot be guaranteed that all relevant specification requirements are met. When the wrapping sleeve or isolation material is damaged, missing or not installed in place, the ladder-shaped sleeper is prone to adhere to the ladder-shaped sleeper during the pouring of the bottom support of the ladder-shaped sleeper, resulting in a "hard collision", which causes the damping pad to fail to play a role. On the other hand, in some adverse situations, due to the small slump of the concrete or the large position of the curve exceeding the value, the site vibration is not in place, which easily leads to the existence of a cavity under the damping pad. In addition, the installation of the wrapping sleeve also increases the laying cost.

[0004] Based on this, the present inventors have conducted in-depth research on the existing ladder-shaped sleeper track and its construction method in order to design a ladder-shaped sleeper track structure and a corresponding construction method that can solve the above problems. SUMMARY

[0005] In order to overcome the above problems, the inventors have made strenuous studies and designed a ladder-shaped sleeper track with auxiliary long sleepers and a limiting pin limiting method, which adopts a limiting pin limiting method; the track comprises a novel ladder-shaped sleeper structure, auxiliary long sleepers are arranged below the damping pads respectively, the auxiliary long sleepers and the bases of the ladder sleepers are integrally cast, the limiting pins are arranged on the auxiliary sleepers, the longitudinal and lateral limiting of the ladder-shaped sleepers is realized through the interaction between the limiting pins on the auxiliary sleepers and the reserved holes on the ladder-shaped sleepers; the scheme can solve the problems of possible empty hanging and hard collision of the ladder-shaped sleepers in the prior art, reduce the dependence of the ladder-shaped sleeper track on construction, enable the limiting surface interacting with the damping pad of the ladder-shaped sleeper to be more comprehensively monitored, facilitate inspection and maintenance, reduce the width of the ladder-shaped sleeper track, reduce the occupation of the line space and the amount of materials, and achieve the purpose of energy saving and emission reduction, thereby completing the present application.

[0006] Specifically, the present application aims to provide a ladder-shaped sleeper track with auxiliary long sleepers and limiting pin limiting, comprising:

[0007] Two longitudinal beams 1 and a connecting steel pipe 2 connecting the longitudinal beams 1, the two longitudinal beams 1 are fixed into a ladder-shaped sleeper through the connecting steel pipe 2;

[0008] Auxiliary long sleepers are arranged below the longitudinal beams 1;

[0009] The arrangement direction of the auxiliary long sleepers is perpendicular to the extension direction of the longitudinal beams 1, and a plurality of auxiliary long sleepers are arranged at intervals, wherein the auxiliary long sleeper in the middle is a middle auxiliary long sleeper 3, and the auxiliary long sleeper at the edge is an end auxiliary long sleeper 4;

[0010] The auxiliary long sleeper and the base below it are integrally cast;

[0011] A longitudinal through reserved hole 5 is formed in the longitudinal beam 1;

[0012] A limiting pin 6 extending upward is arranged at both ends of the middle auxiliary long sleeper 3,

[0013] The limiting pin 6 is inserted into the reserved hole 5, and the limiting pin 6 and the reserved hole 5 limit and cooperate to provide horizontal limiting for the ladder-shaped sleeper.

[0014] A damping pad 7 is arranged between the longitudinal beam 1 and the auxiliary long sleeper.

[0015] A through hole is formed in the damping pad 7, and the through hole is arranged at a position corresponding to the reserved hole 5, that is, the axis of the through hole is collinear with the axis of the reserved hole 5;

[0016] The inner diameter of the through hole is slightly larger than the inner diameter of the reserved hole 5.

[0017] The reserved hole 5 is a frustum hole, meaning that the inner diameter of the reserved hole 5 gradually increases from top to bottom.

[0018] The limiting pin 6 is fitted with a bushing 8 and a buffer bushing 9. The buffer bushing 8 can be inserted into the reserved hole 5 from bottom to top.

[0019] The buffer bushing 8 has a frustum-shaped outer surface, meaning that the outer diameter of the buffer bushing 8 gradually increases from top to bottom.

[0020] The bushing sleeve 8 is located inside the buffer bushing 9 and is interference-fitted.

[0021] The bushing sleeve 8 is a metal tube, which is sleeved outside the limiting pin 6 and can drive the buffer bushing 9 to rotate together.

[0022] The axis of the buffer bushing 9 is 2mm off-center from the axis of the bushing sleeve 8.

[0023] The auxiliary long pillow is a precast reinforced concrete block.

[0024] A steel truss 10 is provided at the bottom of the auxiliary long pillow, and the auxiliary long pillow and the steel truss 10 are cast together with the base 11 below as an integral structure.

[0025] A connecting sleeve 12 is pre-embedded on the top of the auxiliary long sleeper. The connecting sleeve 12 is used to temporarily fix the auxiliary long sleeper and the trapezoidal sleeper during construction.

[0026] The upper section of the limiting pin 6 is located above the middle auxiliary pillow 3, the middle section of the limiting pin 6 is embedded in the middle auxiliary pillow 3, and the lower section of the limiting pin 6 is located below the middle auxiliary pillow 3.

[0027] Around the middle section of the limiting pin 6, a steel sheet is provided in the middle auxiliary pillow 3 to strengthen the connection between the limiting pin 6 and the middle auxiliary pillow 3.

[0028] The lower section of the limiting pin is cast integrally with the base 11.

[0029] The present invention also provides a construction method for a trapezoidal sleeper track with a limiting pin for limiting the sleeper, the construction method comprising the following steps:

[0030] Step 1: Position the vibration damping pad 7 on the bottom surface of the trapezoidal sleeper, accurately and horizontally place the auxiliary long sleeper, arrange the end auxiliary long sleepers 4 at both ends of the trapezoidal sleeper, arrange the middle auxiliary long sleeper 3 in the middle of the trapezoidal sleeper, and put the bushing sleeve 8 and the buffer bushing 9 on the limit pin.

[0031] Step 2: The trapezoidal sleeper is hoisted into place and lowered, so that the vibration damping pad 7 of the trapezoidal sleeper is close to the top surface of the buffer bushing 9 by about 10mm.

[0032] Step 3: Apply glue around the buffer bushing, rotate the buffer bushing appropriately to make the top of the buffer bushing precisely aligned with the reserved hole 5, lift the buffer bushing upwards to insert it into the reserved hole 5 of the longitudinal beam 1.

[0033] Step 4: Lower the trapezoidal sleeper and place it on the auxiliary sleeper to install the buffer bushing in place; after installation, the upper surface of the buffer bushing 9 is flush with and tightly fitted to the upper surface of the longitudinal beam 1, and the lower surface of the buffer bushing 9 is flush with and tightly fitted to the lower surface of the longitudinal beam 1.

[0034] Step 5: Use temporary fixing fixtures to bind the auxiliary long sleeper and the trapezoidal sleeper together to form a fixing unit, thus completing the temporary fixing;

[0035] Step 6: Transport the secured unit to the work location and adjust its geometry;

[0036] Step 7: The width of the base 11 is the same as the length of the auxiliary long pillow. Before the base is poured, the base formwork is erected on the outside of the longitudinal beam of the fixed unit. The top of the base formwork is slightly higher than 1 / 3 of the height of the concrete part of the auxiliary long pillow.

[0037] Step 8: Base pouring. Concrete is poured from the middle position between the two longitudinal beams 1, and the pouring height of the concrete is controlled.

[0038] Step 9: Apply concrete to the base. For straight sections, the auxiliary sleepers will be set as an arched structure with a high center and low sides. For curved sections, the base surface will be set as a single slope according to the superelevation of the line.

[0039] Step 10: After the concrete reaches 70% of its design strength, remove the base formwork, and then remove the temporary fixing fixtures after removing the base formwork.

[0040] Step 11: After the site is cleaned up, install the ladder sleeper cover plate 15.

[0041] The temporary fixing fixture includes a long bolt 13 and a square steel pipe 14. The square steel pipe 14 is placed on two longitudinal beams 1. The long bolt 13 passes through the square steel pipe 14 and is screwed into the connecting sleeve 12 to press the two ends of the square steel pipe 14 onto the longitudinal beams 1, thereby binding the auxiliary long pillow and the ladder pillow together to form a fixing unit.

[0042] The beneficial effects of this invention include:

[0043] (1) The trapezoidal sleeper track with auxiliary long sleeper and limiting pin limit provided by the present invention and its construction method solve the problems of empty suspension and hard collision that may occur in the existing trapezoidal sleeper, and reduce the dependence of the trapezoidal sleeper track on construction.

[0044] (2) The trapezoidal sleeper track with auxiliary long sleeper and limiting pin limiting and the construction method thereof can comprehensively monitor the limiting surface interacting with the trapezoidal sleeper damping pad, and facilitates inspection and maintenance;

[0045] (3) The trapezoidal sleeper track with auxiliary long sleeper and limiting pin limiting and the construction method thereof do not need to pour a roadbed stop platform, the width of the trapezoidal sleeper track is reduced, thereby reducing the occupation of line space and the consumption of materials, saving costs, and achieving the purposes of energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 The figure shows the overall three-dimensional structure schematic diagram of the trapezoidal sleeper track with auxiliary long sleeper and limiting pin limiting provided by the present application;

[0047] Figure 2 The figure shows the three-dimensional structure schematic diagram of the trapezoidal sleeper in the trapezoidal sleeper track with auxiliary long sleeper and limiting pin limiting provided by the present application;

[0048] Figure 3 The figure shows the three-dimensional structure schematic diagram of the end auxiliary long sleeper in the trapezoidal sleeper track with auxiliary long sleeper and limiting pin limiting provided by the present application;

[0049] Figure 4 The figure shows the three-dimensional structure schematic diagram of the middle auxiliary long sleeper in the trapezoidal sleeper track with auxiliary long sleeper and limiting pin limiting provided by the present application;

[0050] Figure 5 The figure shows the structure schematic diagram of the buffer bushing and bushing sleeve in the trapezoidal sleeper track with auxiliary long sleeper and limiting pin limiting provided by the present application;

[0051] Figure 6 The figure shows the laying position schematic diagram of the auxiliary long sleeper in the trapezoidal sleeper track with auxiliary long sleeper and limiting pin limiting provided by the present application;

[0052] Figure 7 The figure shows the structure schematic diagram of the auxiliary long sleeper and the trapezoidal sleeper being bound as a whole to form a fixed unit in the construction process of the trapezoidal sleeper track with auxiliary long sleeper and limiting pin limiting provided by the present application.

[0053] REFERENCE NUMERALS

[0054] 1 - longitudinal beam

[0055] 2 - connecting steel pipe

[0056] 3 - middle auxiliary long sleeper

[0057] 4 - end auxiliary long sleeper

[0058] 5 - reserved hole

[0059] 6 - limiting pin

[0060] 7-Vibration damping pad

[0061] 8-Bushing Sleeve

[0062] 9-Buffer Bushing

[0063] 10-Reinforced steel truss

[0064] 11-Base

[0065] 12-Connecting sleeve

[0066] 13-Long Bolt

[0067] 14-Square steel pipe

[0068] 15-Ladder sleeper cover plate Detailed Implementation

[0069] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more apparent.

[0070] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0071] This invention provides a trapezoidal sleeper track with a limiting pin for limiting the auxiliary long pillow, such as... Figure 1 and Figure 2 As shown, the sleeper track includes: two longitudinal beams 1 and a connecting steel pipe 2 for connecting the longitudinal beams 1, the two longitudinal beams 1 are fixed together to form a trapezoidal sleeper by the connecting steel pipe 2; auxiliary long sleepers are laid under the longitudinal beams 1;

[0072] The auxiliary long pillow is laid in a direction perpendicular to the extension direction of the longitudinal beam 1, and there are multiple auxiliary long pillows. Generally, 5-8 auxiliary long pillows can be set below the longitudinal beam. The multiple auxiliary long pillows are arranged at intervals. Among them, the auxiliary long pillow located in the middle is the middle auxiliary long pillow 3, and the auxiliary long pillow located at the edge is the end auxiliary long pillow 4.

[0073] The auxiliary long pillow is a prefabricated component, and during subsequent construction, the auxiliary long pillow and the base below it are cast into an integral structure.

[0074] A longitudinally through pre-drilled hole 5 is provided on the longitudinal beam 1; upwardly extending limiting pins 6 are provided at both ends of the auxiliary long pillow 3 in the middle.

[0075] The limiting pin 6 is inserted into the reserved hole 5, and the limiting pin 6 and the reserved hole 5 limit the trapezoidal sleeper horizontally. A limiting buffer structure such as a buffer bushing is arranged between the limiting pin 6 and the inner wall of the reserved hole 5, so that the limiting buffer structure is simple and efficient, and the position of the buffer structure is visible and maintainable.

[0076] Preferably, a damping pad 7 is laid between the longitudinal beam 1 and the auxiliary long sleeper, and the damping pad 7 is point-laid and arranged at all contact surfaces between the auxiliary long sleeper and the longitudinal beam 1.

[0077] A through hole is formed in the damping pad 7, and the through hole is arranged at a position corresponding to the reserved hole 5, that is, the axis of the through hole is collinear with the axis of the reserved hole 5;

[0078] The inner diameter of the through hole is slightly larger than the inner diameter of the reserved hole 5, that is, larger than the maximum inner diameter of the reserved hole, that is, the inner diameter of the bottom surface of the reserved hole.

[0079] Preferably, the reserved hole 5 is a circular truncated cone hole, that is, the inner diameter of the reserved hole 5 gradually increases from top to bottom. Such a gradually changing reserved hole can facilitate the positioning and insertion of the limiting pin and the buffer bushing.

[0080] In a preferred embodiment, as shown in Figure 5 A bushing sleeve 8 and a buffer bushing 9 are sleeved outside the limiting pin 6, the buffer bushing 8 can be inserted into the reserved hole 5 from bottom to top, and the buffer bushing 8 has a circular truncated cone shape outside, that is, the outer diameter of the buffer bushing 8 gradually increases from top to bottom.

[0081] The bushing sleeve 8 is located inside the buffer bushing 9 and is in interference fit, so that the bushing sleeve 8 and the buffer bushing 9 can rotate synchronously. The bushing sleeve 8 is a metal pipe, which is sleeved outside the limiting pin 6 and can drive the buffer bushing 9 to rotate around the axis of the limiting pin 6. The gap between the bushing sleeve 8 and the limiting pin 6 is as small as possible.

[0082] The buffer bushing 9 is made of a conventional buffer pad on a trapezoidal sleeper and has a certain elasticity. The buffer bushing 9 fills the gap between the reserved hole 5 and the limiting pin, which can not only play a buffering role for the trapezoidal sleeper, but also ensure that the trapezoidal sleeper and the auxiliary long sleeper can be smoothly installed. Even if there is a certain processing error in the positions of the reserved hole 5 and the limiting pin, the limiting pin and the buffer bushing 9 can still be smoothly inserted into the reserved hole 5.

[0083] In a preferred embodiment, the auxiliary long sleeper is a prefabricated reinforced concrete block, as shown in Figure 3 and Figure 4As shown in the drawings, a steel bar truss 10 is arranged at the bottom of the auxiliary long pillow, and the auxiliary long pillow and the steel bar truss 10 are integrally poured with the underlying base 11; a connecting sleeve 12 is pre-embedded at the top of the auxiliary long pillow, and the connecting sleeve 12 is used to temporarily fix the auxiliary long pillow and the ladder-shaped track pillow during construction.

[0084] In a preferred embodiment, the upper section of the limiting pin 6 is located above the middle auxiliary long pillow 3, the middle section of the limiting pin 6 is embedded in the middle auxiliary long pillow 3, and the lower section of the limiting pin 6 is located below the middle auxiliary long pillow 3.

[0085] Steel sheets are arranged around the middle section of the limiting pin 6 in the middle auxiliary long pillow 3 to strengthen the connection strength between the limiting pin 6 and the middle auxiliary long pillow 3; the lower section of the limiting pin is integrally poured with the base 11, which can provide greater longitudinal and transverse resistance.

[0086] The application also provides a construction method of a ladder-shaped track pillow track with an auxiliary long pillow limiting limiting pin, which comprises the following steps:

[0087] Step 1, the position of the ladder-shaped track pillow vibration damping pad 7, the auxiliary long pillow is accurately placed horizontally, the end auxiliary long pillows 4 are arranged at both ends of the ladder-shaped track pillow, the middle auxiliary long pillow 3 is arranged in the middle of the ladder-shaped track pillow, and the bushing sleeve 8 and the buffer bushing 9 are sleeved on the limiting pin;

[0088] Step 2, the ladder-shaped track pillow is hoisted into position and falls, so that the vibration damping pad 7 of the ladder-shaped track pillow is close to the top surface of the buffer bushing 9 by about 10mm; the thickness of the longitudinal beam 1 and the height of the buffer bushing are both greater than 10mm, so that the buffer bushing bottom is sleeved on the limiting pin 6, and the buffer bushing top can be inserted into the reserved hole 5;

[0089] Step 3, the buffer bushing is appropriately rotated after the buffer bushing is smeared with glue around the buffer bushing, so that the top end of the buffer bushing is accurately aligned with the reserved hole 5, and the buffer bushing is lifted upward to be inserted into the reserved hole 5 of the longitudinal beam 1.

[0090] In the application, the axis of the buffer bushing 9 is not collinear with the axis of the bushing sleeve 8, and a 2mm eccentricity is provided, so that the buffer bushing 9 can be prevented from rotating and falling off under the action of vibration load during operation, and the buffer bushing can be ensured to be in close contact with the ladder pillow reserved hole for a long time. Based on this, the buffer bushing needs to be appropriately rotated to align the buffer bushing with the reserved hole 5 during installation. The eccentric structure can also automatically adjust the processing error of the equipment to ensure smooth construction and assembly.

[0091] In the application, the glue is smeared around the buffer bushing to realize the bonding of the bushing and the opening surface of the ladder pillow, and it is also one of the measures to prevent the buffer bushing from falling off.

[0092] Step 4, put down the ladder-shaped sleeper and make it sit on the auxiliary sleeper, and install the buffer bushing in place; after installation, the upper surface of the buffer bushing 9 is flush with and tightly fitted to the upper surface of the longitudinal beam 1, and the lower surface of the buffer bushing 9 is flush with and tightly fitted to the lower surface of the longitudinal beam 1;

[0093] Step 5, bind the auxiliary long sleeper and the ladder-shaped sleeper into an integrated fixed unit through temporary fixing tooling, and complete temporary fixing; at this time, the longitudinal beam and the auxiliary long sleeper clamp the damping pad;

[0094] Step 6, transport the bound fixed unit to the working position and adjust the geometric shape;

[0095] Step 7, the width of the base 11 is the same as the length of the auxiliary long sleeper, before pouring the base, the base formwork is erected outside the longitudinal beam of the fixed unit, and the top of the base formwork is slightly higher than the 1 / 3 height of the concrete part of the auxiliary long sleeper;

[0096] Step 8, base pouring, the concrete is poured from the middle position between the two longitudinal beams 1, and the pouring height of the concrete is controlled;

[0097] Step 9, base concrete finishing, the straight section sets the auxiliary long sleeper as an arch structure with the middle high and the two sides low, and the curved section sets the surface of the base as a single inclined slope according to the line superelevation;

[0098] Step 10, after the concrete reaches 70% of the design strength, the base formwork is removed, and the temporary fixing tooling is removed after the base formwork is removed;

[0099] Step 11, after the site is cleaned, the ladder sleeper cover plate 15 is installed.

[0100] Preferably, the temporary fixing tooling includes long bolts 13 and square steel pipes 14, the square steel pipes 14 are overlapped and placed on the two longitudinal beams 1, and the two ends of the square steel pipes 14 are pressed on the longitudinal beams 1 by screwing the long bolts 13 through the square steel pipes 14 and into the connecting sleeves 12, so as to bind the auxiliary long sleeper and the ladder sleeper into an integrated fixed unit.

[0101] Embodiment

[0102] Lay 1000 meters long bridge track system, wherein the ladder-shaped sleeper is selected as a ladder-shaped sleeper track with auxiliary long sleeper and limit pin limit, the track includes the ladder-shaped sleeper as shown in Figure 2 , also includes the auxiliary long sleeper as shown in Figure 3 and Figure 4 , and the auxiliary long sleeper is further provided with the bushing sleeve and the buffer bushing as shown in Figure 5 , the auxiliary long sleeper is placed in the position as shown in Figure 6 , and the ballast bed base is poured below the ladder-shaped sleeper.

[0103] The construction method is as follows:

[0104] Step 1, the position of the ladder-shaped sleeper bottom damping pad 7, accurately horizontally place the auxiliary long sleeper, arrange the end auxiliary long sleeper 4 at both ends of the ladder-shaped sleeper, arrange the middle auxiliary long sleeper 3 at the middle part of the ladder-shaped sleeper, and sleeve the bushing sleeve 8 and the buffer bushing 9 on the limiting pin;

[0105] Step 2, hoist the ladder-shaped sleeper into position and drop it, so that the damping pad 7 of the ladder-shaped sleeper is close to the top surface of the buffer bushing 9 by about 10 mm; the thickness of the longitudinal beam 1 and the height of the buffer bushing are both greater than 10 mm, so that the buffer bushing bottom is sleeved on the limiting pin 6, and the buffer bushing top can extend into the reserved hole 5;

[0106] Step 3, apply glue around the buffer bushing, appropriately rotate the buffer bushing, accurately align the top end of the buffer bushing with the reserved hole 5, and lift the buffer bushing upward to make it inserted into the reserved hole 5 of the longitudinal beam 1;

[0107] Step 4, lower the ladder-shaped sleeper to make it sit on the auxiliary sleeper, and install the buffer bushing into position; after the installation is completed, the upper surface of the buffer bushing 9 is flush with and tightly attached to the upper surface of the longitudinal beam 1, and the lower surface of the buffer bushing 9 is flush with and tightly attached to the lower surface of the longitudinal beam 1;

[0108] Step 5, bind the auxiliary long sleeper and the ladder-shaped sleeper into one body through a temporary fixing tool to form a fixed unit, and complete the temporary fixing;

[0109] Step 6, transport the bound fixed unit to the working position and adjust the geometric shape;

[0110] Step 7, the width of the base 11 is the same as the length of the auxiliary long sleeper, and the base formwork is erected outside the longitudinal beam of the fixed unit before the base is poured, and the top of the base formwork is slightly higher than 1 / 3 of the height of the concrete part of the auxiliary long sleeper;

[0111] Step 8, base pouring, the concrete is poured from the middle position between the two longitudinal beams 1, and the pouring height of the concrete is controlled;

[0112] Step 9, base concrete finishing, the straight section sets the auxiliary long sleeper as an arch structure with the middle high and the two sides low, and the curved section sets the surface of the base as a single inclined slope according to the line superelevation;

[0113] Step 10, after the concrete reaches 70% of the design strength, the base formwork is removed, and the temporary fixing tool is removed after the base formwork is removed;

[0114] Step 11, after the site is cleaned, the sleeper cover plate 15 is installed.

[0115] The 1000m long bridge track system is laid without consuming wrapping sleeve and other isolation materials, the track bed width is 2m, the amount of track bed concrete is 338m 3 , the amount of track bed steel is 69.61t, and the amount of mold is 260m 2 . A total of 15 workers participate in the work, and each worker's working time is 110 hours; the laid track system is detected, and no hard collision and empty hanging defects are found.

[0116] Comparative example

[0117] A 1000m long bridge track system is laid, wherein the trapezoidal sleeper selects a traditional trapezoidal sleeper of 5900x580x185mm type, a limiting boss is arranged on the trapezoidal sleeper, and a lateral blocking table is arranged on the track bed below the trapezoidal sleeper; the specific construction method is as follows:

[0118] Step 1, paste isolation materials on the bottom surface of the trapezoidal sleeper, the outer side surface of the longitudinal beam and the end surface;

[0119] Step 2, wrap the wrapping sleeve, and make good sealing measures for the wrapping sleeve;

[0120] Step 3, determine the position of the trapezoidal sleeper track bed, and mark by elastic line;

[0121] Step 4, bind the base and blocking table steel bars;

[0122] Step 5, transport and erect the trapezoidal sleeper with good isolation measures to the track bed steel cage;

[0123] Step 6, erect the mold, including the end mold, the center ditch mold, the base and the blocking table mold;

[0124] Step 7, adjust the track geometric state;

[0125] Step 8, pour concrete from the side edge of the trapezoidal sleeper;

[0126] Step 9, remove the above mold, and lay the middle and end drainage ditch cover plates.

[0127] The 1000m long bridge track system is laid, consuming 167 pairs of wrapping sleeves, the amount of isolation material pearl wool is 33.32m 3 , the track bed width is 2.5m, the amount of track bed concrete is 480m 3 , the amount of track bed steel is 84.66t, and the amount of mold is 1200m 2 . A total of 15 workers participate in the work, and each worker's working time is 130 hours; the laid track system is detected, and 11 hard collision defects and 1 empty hanging defect are found, and further defect repair is carried out by 5 workers, and each worker's working time is 5 hours.

[0128] From the above examples and comparative examples, it can be seen that the ladder-shaped tie rail tie rail with auxiliary long tie rail limiting pin limiting and the construction method thereof provided by the application not only can improve the construction quality, but also can shorten the construction time and improve the construction efficiency.

[0129] The application is described above in combination with preferred embodiments, but these embodiments are only exemplary and are only for illustrative purposes. On this basis, various substitutions and improvements can be made to the application, and these all fall within the protection scope of the application.

Claims

1. A ladder track tie rail with an auxiliary long pillow for limiting the position of a tie limiting pin, characterized in that, The utility model relates to a kind of ladder-shaped sleeper track of limiting pin limiting of auxiliary long sleeper, including: Two longitudinal beams (1) and the joint steel pipe (2) for connecting the longitudinal beam (1), two longitudinal beams (1) are consolidated into ladder-shaped sleeper by the joint steel pipe (2); Auxiliary long sleeper is laid under the longitudinal beam (1); The laying direction of the auxiliary long sleeper is perpendicular to the extension direction of longitudinal beam (1), and the auxiliary long sleeper is provided with multiple, arranged at intervals, wherein the auxiliary long sleeper in the middle is middle auxiliary long sleeper (3), and the auxiliary long sleeper in the edge is end auxiliary long sleeper (4); The auxiliary long sleeper and its underlying base are integrally structured; Longitudinal through preformed hole (5) is set in the longitudinal beam (1); Limiting pin (6) is provided at both ends of the middle auxiliary long sleeper (3) and extends upwards, The limiting pin (6) is inserted into the preformed hole (5), and the limiting pin (6) and preformed hole (5) are limited to provide horizontal limiting for the ladder-shaped sleeper.

2. The ladder-shaped sleeper track of limiting pin limiting of auxiliary long sleeper according to claim 1, wherein, Damping pad (7) is laid between the longitudinal beam (1) and the auxiliary long sleeper.

3. The ladder-shaped sleeper track of limiting pin limiting of auxiliary long sleeper according to claim 2, wherein, A through hole is formed in the damping pad (7), and the through hole is formed at a position corresponding to the preformed hole (5), that is, the axis of the through hole is collinear with the axis of the preformed hole (5); The inner diameter of the through hole is slightly larger than the inner diameter of the preformed hole (5).

4. The ladder-shaped sleeper track of limiting pin limiting of auxiliary long sleeper according to claim 3, wherein, The preformed hole (5) is a circular truncated cone hole, that is, the inner diameter of the preformed hole (5) gradually increases from top to bottom.

5. The ladder-shaped sleeper track of limiting pin limiting of auxiliary long sleeper according to claim 1, wherein, A bushing sleeve (8) and a buffer bushing (9) are sleeved on the outside of the limiting pin (6), and the buffer bushing (8) can be inserted into the preformed hole (5) from bottom to top, The buffer bushing (8) is circular truncated cone-shaped on the outside, that is, the outer diameter of the buffer bushing (8) gradually increases from top to bottom.

6. The ladder-shaped sleeper track of limiting pin limiting of auxiliary long sleeper according to claim 5, wherein, The bushing sleeve (8) is located on the inner side of the buffer bushing (9) and is in interference fit; The bushing sleeve (8) is a metal pipe, which is sleeved on the outside of the limiting pin (6) and can rotate together with the buffer bushing (9); Preferably, the eccentricity between the axis of the buffer bushing (9) and the axis of the bushing sleeve (8) is 2 mm.

7. The ladder-shaped sleeper track of limiting pin limiting of auxiliary long sleeper according to claim 1, wherein, The auxiliary long sleeper is a prefabricated reinforced concrete block, A steel bar truss (10) is arranged at the bottom of the auxiliary long sleeper, and the auxiliary long sleeper and the steel bar truss (10) are integrally structured with the underlying base (11); A connecting sleeve (12) is embedded at the top of the auxiliary long sleeper, and the connecting sleeve (12) is used to temporarily fix the auxiliary long sleeper and the ladder-shaped sleeper during construction.

8. The track of the gavel-shaped tie rail with the auxiliary long tie rail and the limiting pin, wherein the upper section of the limiting pin (6) is above the middle auxiliary long tie rail (3), the middle section of the limiting pin (6) is embedded in the middle auxiliary long tie rail (3), and the lower section of the limiting pin (6) is below the middle auxiliary long tie rail (3). A steel sheet is arranged around the middle section of the limiting pin (6) in the middle auxiliary long tie rail (3) to strengthen the connection between the limiting pin (6) and the middle auxiliary long tie rail (3). The lower section of the limiting pin is integrally cast with the base (11).

9. The construction method of the track of the gavel-shaped tie rail with the auxiliary long tie rail and the limiting pin, comprising the following steps: Step 1: The auxiliary long tie rail is accurately placed horizontally at the position of the vibration-damping pad (7) of the gavel-shaped tie rail, the end auxiliary long tie rails (4) are arranged at the two ends of the gavel-shaped tie rail, the middle auxiliary long tie rail (3) is arranged in the middle of the gavel-shaped tie rail, and the bushing sleeve (8) and the buffer bushing (9) are sleeved on the limiting pin. Step 2: The gavel-shaped tie rail is hoisted into position and dropped, and the vibration-damping pad (7) of the gavel-shaped tie rail is brought close to the top surface of the buffer bushing (9) by about 10 mm. Step 3: The buffer bushing is appropriately rotated after being smeared with glue around the buffer bushing, so that the top end of the buffer bushing is accurately aligned with the reserved hole (5), and the buffer bushing is lifted upward and inserted into the reserved hole (5) of the longitudinal beam (1). Step 4: The gavel-shaped tie rail is lowered and placed on the auxiliary tie rail, so that the buffer bushing is installed in place; after the installation is completed, the upper surface of the buffer bushing (9) is flush with and tightly attached to the upper surface of the longitudinal beam (1), and the lower surface of the buffer bushing (9) is flush with and tightly attached to the lower surface of the longitudinal beam (1). Step 5: The auxiliary long tie rail and the gavel-shaped tie rail are bound together as a whole by a temporary fixing tool to form a fixed unit, and the temporary fixing is completed. Step 6: The bound fixed unit is transported to the working position and the geometric shape is adjusted. Step 7: The width of the base (11) is the same as the length of the auxiliary long tie rail, and the base formwork is erected outside the longitudinal beam of the fixed unit before the base is cast, and the top of the base formwork is slightly higher than the height of 1 / 3 of the concrete part of the auxiliary long tie rail. Step 8: The base is cast, and the concrete is cast from the middle position between the two longitudinal beams (1), and the casting height of the concrete is controlled. Step 9: The base concrete is troweled, the straight section sets the auxiliary long tie rail as an arch structure with the middle high and the two sides low, and the curved section sets the surface of the base as a single inclined slope according to the line superelevation. Step 10: After the concrete reaches 70% of the design strength, the base formwork is removed, and the temporary fixing tool is removed after the base formwork is removed. Step 11: After the site is cleaned, the tie rail cover plate (15) is installed.

10. The construction method of the track of the gavel-shaped tie rail with the auxiliary long tie rail and the limiting pin according to claim 9. ​ ​ The temporary fixing tool comprises long bolts (13) and square steel pipes (14), the square steel pipes (14) are overlapped and placed on the two longitudinal beams (1), and the two ends of the square steel pipes (14) are pressed on the longitudinal beams (1) through the long bolts (13) penetrating through the square steel pipes (14) and being screwed into the connecting sleeves (12), so that the auxiliary long pillow and the ladder pillow are bound into one, and the fixed unit is formed.

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