CN211340219U - Assembled ballastless track structure containing cold pressing longitudinal connection of vibration reduction section - Google Patents
Assembled ballastless track structure containing cold pressing longitudinal connection of vibration reduction section Download PDFInfo
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- CN211340219U CN211340219U CN201921557727.4U CN201921557727U CN211340219U CN 211340219 U CN211340219 U CN 211340219U CN 201921557727 U CN201921557727 U CN 201921557727U CN 211340219 U CN211340219 U CN 211340219U
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Abstract
The utility model discloses an assembled ballastless track structure containing cold pressing longitudinal connection of a vibration damping section, which comprises a plurality of prefabricated sleeper slabs or prefabricated track slabs, a cast-in-situ layer, a vibration damping layer, a track lower part foundation, a connection filling part and a cold pressing longitudinal connection structure, wherein the prefabricated sleeper slabs or the prefabricated track slabs are arranged at intervals longitudinally, and the transverse ends of the prefabricated sleeper slabs or the prefabricated track slabs at the interval area are respectively assembled and connected with each other through the longitudinal connection structure; in part or all of the spacer areas, a reinforced concrete structure is adopted as a connecting filling part. The utility model enables the connection filling part and the prefabricated sleeper slab or the prefabricated track slab to form an assembly integral structure, the prefabricated sleeper slab or the prefabricated track slab forms a long slab unit structure body with the same stress, and the assembly connection, the limiting and the vibration damping effects are realized at the same time; the precision of the working time of on-site paving facilities can be improved, the disassembly and the assembly are convenient, the construction difficulty is reduced, and the construction speed is improved.
Description
Technical Field
The utility model belongs to the technical field of ballastless track, more specifically relates to an assembled sleeper slab formula or track plate formula ballastless track structure that contains the longitudinal connection structure of colding pressing for damping section.
Background
The ballastless track is a track structure which adopts integral foundations such as concrete, asphalt mixture and the like to replace a loose gravel track bed. Compared with a ballast track, the ballastless track avoids the splashing of the ballast, has good smoothness, good stability, long service life, good durability and less maintenance work, and is applied more and more. The slab ballastless track structure mainly relates to structures such as a track slab, an asphalt mortar or self-compacting concrete filling layer, a base or a supporting layer and the like, wherein the base or the supporting layer adopts a concrete structure, and the asphalt mortar or the self-compacting concrete filling layer laid on the base or the supporting layer is a structural layer for adjusting and supporting the force transmission of the ballastless track structure.
At present, the types of plate-type ballastless tracks in China mainly comprise CRTS I type plate type, CRTS II type plate type and CRTS III type plate-type ballastless tracks. The CRTS I type plate ballastless track is a unit plate, is not longitudinally connected with plates, is not provided with a transverse stop block, is laid on a cast-in-place reinforced concrete base with a convex block platform, and is limited by the convex block platform. In the unit plate type ballastless track structure, each track plate after being laid and installed is independent, and the defects that the track plates and the asphalt mortar filling layer can be peeled off after the track runs for a period of time, the longitudinal end parts of the track plates are easy to warp, and the adverse effects on the running stability and comfort of a train and the service life of the track structure are undoubtedly caused. Although the existing scheme for improving the connection mode exists, the problems of stress deformation between plate bodies and complex preparation process are still difficult to meet, and the problems of difficult assembly and maintenance of the whole ballastless track caused by excessive ballastless track special-shaped plates cannot be solved.
The CRTS II type plate type ballastless track plate adopts a longitudinal connection mode, the ballastless track plate is longitudinally connected with the plate, a longitudinal connection structure is formed by a longitudinal fine-rolled thread steel bar and a tensioning locking piece, and a transverse stop block is arranged, so that partial defects of a CRTS I type plate type ballastless track can be overcome. For example, patent document 201695285U discloses a tension lock for longitudinal connection of ballastless track slabs, which is used for longitudinal connection by connecting and locking reinforcing steel bars longitudinally extending from the track slabs. However, this type of connection is substantially equivalent to the way of longitudinal prestressing of the steel bars, the construction of the connection is complex and cumbersome, and the rigid connection still presents the possibility of arching of the track slabs in the case of excessive temperature forces, which adversely affects the life of the track structure and the smoothness and comfort of the train operation.
Patent document CN204370701U discloses a mechanical connecting device for reinforcing bars in a fabricated concrete building structure, which is used for connecting reinforcing bars by upsetting the ends of the reinforcing bars to be connected, and inserting reinforcing bar sleeves into the ends, so as to connect the reinforcing bars by using the connecting sleeves and connecting bolts. However, the connection mode is complex in structure and complex in construction, the gap reserved between the clamp ring arranged on the steel bar sleeve and the steel bar to be connected can also cause that the adjacent assembly type sleeper slab or track slab is not on the same plane, and the precision is difficult to control during construction.
SUMMERY OF THE UTILITY MODEL
At least one to more than prior art defect or improvement demand, the utility model provides an assembled sleeper slab ballastless track structure that is used for containing the longitudinal connection structure of colding pressing of damping section, a plurality of prefabricated short sleeper slab intervals set up and form the sleeper slab of growth through longitudinal connection structure and connection packing part erection joint, the compartment sets up spacing reinforcing bar and stop sleeve, one of them is fixed with being connected packing part with stop sleeve, another is fixed with track lower part basis, form spacing reinforcing bar and stop sleeve's sliding construction, and be convenient for connect packing part and reciprocate, realize producing the buffering of vibration to the vehicle when playing to indulge horizontal spacing, wherein connect the packing part and realized promptly that the connection that realizes simultaneously spacingly, the process is few to carry out the worker conveniently. Furthermore, the utility model discloses a vertical connection structure of colding pressing can improve the precision when the on-the-spot shop facility, and convenient dismantlement and installation reduce the construction degree of difficulty, improve on-the-spot construction speed, and simple structure makes things convenient for the location of sleeper slab or track board.
In order to achieve the above object, according to one aspect of the present invention, there is provided an assembled sleeper slab or track slab ballastless track structure including a cold-pressed longitudinal connection structure for a vibration-damping section, comprising a prefabricated sleeper slab or a prefabricated track slab, a cast-in-place layer, a vibration-damping layer, a track lower foundation, a connection filling part, and a longitudinal connection structure of the prefabricated sleeper slab or the prefabricated track slab;
the prefabricated sleeper plates or the prefabricated track plates are longitudinally arranged at intervals, and the transverse ends of the prefabricated sleeper plates or the prefabricated track plates in the interval area are respectively assembled and connected with each other through a longitudinal connecting structure; in part or all of the interval areas, a reinforced concrete structure is adopted as a connecting and filling part, so that the connecting and filling part and the prefabricated sleeper slab or the prefabricated track slab form an assembled integral structure, and the prefabricated sleeper slab or the prefabricated track slab forms a same stressed long slab unit structure body;
the longitudinal connecting structure comprises longitudinal steel bars and a cold extrusion sleeve; longitudinal steel bars are pre-embedded in two adjacent prefabricated sleeper plates or prefabricated track plates, extend out of the end faces and are arranged at intervals with the other matched longitudinal steel bar, and the two longitudinal steel bars are longitudinally connected through a cold extrusion sleeve;
the internal diameter of the cold extrusion sleeve is larger than the external diameter of the longitudinal steel bars, the butt joint ends of the two longitudinal steel bars are respectively inserted into the two ends of the cold extrusion sleeve, and the cold extrusion sleeve is deformed and locked under the extrusion of the portable extruder.
Furthermore, connecting and filling parts are respectively arranged at the two transverse ends of at least part of the interval area, and protruding limiting steel bars are arranged on the upper surface of the track lower foundation of at least part of the interval area; the longitudinal connecting structure, the limiting steel bars and the limiting sleeves are all coated in the same connecting and filling part, and the longitudinal connecting structure, the limiting steel bars and the limiting sleeves are integrally formed to realize simultaneous limiting and connection, so that a plurality of prefabricated sleeper plates or prefabricated track plates are assembled to form a track unit with a preset length and form a same stressed structure body;
or,
the transverse two ends of at least part of the interval area are respectively provided with a connecting filling part, and the upper surface of the lower part foundation of the track of at least part of the interval area is provided with a protruding limiting sleeve; and in the interval area that is provided with connection filling part and stop component simultaneously, connect the filling part and bury limiting steel bar underground, limiting sleeve's outer wall with connect the filling part contactless, limiting steel bar slidable sets up in limiting sleeve, vertical connection structure, limiting steel bar, limiting sleeve all is cladded in same connect the filling part, four integrated into one piece realize spacing and connection simultaneously to a plurality of prefabricated sleeper slab or prefabricated track board assemble the track unit that forms predetermined length and form same atress structure.
Further, the prefabricated sleeper slab or the prefabricated track slab comprises a plurality of pairs of fastener rail bearing platforms, preferably 2-10 pairs, and more preferably 4-6 pairs.
Furthermore, gaps are arranged at the two longitudinal ends of the prefabricated sleeper slab or the prefabricated track slab, and cover plates are arranged on the gaps to form a smooth evacuation channel.
Further, the rail lower part foundation is provided with a drainage ditch along the longitudinal direction.
Furthermore, drainage ditches are arranged on the two transverse sides of the prefabricated sleeper plate or the prefabricated track plate.
Furthermore, first limiting structures are arranged on two sides of the long plate unit, or second limiting structures are arranged in the plate.
Further, plate gaps are arranged among a plurality of adjacent track units, and a third limiting structure is arranged in part or all of the plate gaps.
As another aspect of the utility model, an assembly method that is used for the assembled sleeper board formula or the rail plate formula ballastless track structure of the longitudinal connection structure that contains cold pressing of damping section is provided, including following step:
s1: carrying prefabricated sleeper plates or prefabricated track plates manufactured in a factory to a construction site, and carrying out primary adjustment and positioning after a preset number of the prefabricated sleeper plates or the prefabricated track plates are longitudinally arranged along a line;
s2: connecting the prefabricated sleeper plates or the longitudinal steel bars pre-embedded in the prefabricated track plates together through a plurality of cold extrusion sleeves for fine adjustment and positioning;
s3: arranging a plurality of limiting reinforcing steel bars on the basis of the lower part of the track of part or all of the spacing areas, sleeving the limiting reinforcing steel bars with limiting sleeves, respectively pouring reinforced concrete on the transverse two ends of the spacing areas in the spacing areas which are simultaneously provided with the longitudinal connecting structures and the limiting members in situ, and wrapping and covering the longitudinal connecting structures, the limiting reinforcing steel bars and the limiting sleeves; after curing, forming the connecting and filling part, and integrally forming the connecting and filling part and the connecting and filling part to realize simultaneous limiting and connecting; respectively pouring reinforced concrete on the transverse two ends of the interval area which is partially or completely not provided with the limiting reinforcing steel bars in situ, and wrapping and covering the longitudinal connecting structure; the method comprises the steps of simultaneously finishing integration, transverse/longitudinal limiting and vertical elastic deformation through one-time cast-in-place, so that a plurality of prefabricated sleeper plates or prefabricated track plates are assembled to form track units with preset lengths and form a same stressed structure body;
or,
arranging a plurality of limiting sleeves on the basis of the lower part of the track of a part or all of the spacing areas, placing limiting reinforcing steel bars in the limiting sleeves, arranging protection outside the limiting sleeves, respectively pouring reinforced concrete on site at the two transverse ends of the spacing areas in the spacing areas which are simultaneously provided with the longitudinal connecting structures and the limiting members, and wrapping and covering the longitudinal connecting structures, the limiting reinforcing steel bars and the limiting sleeves; after curing, forming the connecting and filling part, and integrally forming the connecting and filling part and the connecting and filling part to realize simultaneous limiting and connecting; respectively pouring reinforced concrete on the horizontal two ends of the spacing area which is partially or completely not provided with the limiting sleeve in situ, and wrapping and covering the longitudinal connecting structure; and the integration, the transverse/longitudinal limiting and the vertical elastic deformation are simultaneously completed through one-time cast-in-place, so that a plurality of prefabricated sleeper plates or prefabricated track plates are assembled to form a track unit with a preset length and form a same stressed structure body.
The above-mentioned further improvement features can be combined with each other as long as they do not conflict with each other.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
(1) the utility model discloses a vertical connection structure for assembled sleeper board formula or track board formula ballastless track structure of damping district, connection structure is simple, only contains cold extrusion sleeve and exposes the reinforcing bar, and adjacent sleeper board or track board are at same horizontal plane, through adjacent reinforcing bar connection that exposes, can accomplish vertical and horizontal location to the section of track structure, found prefabricated sleeper board of mould or track board.
(2) The utility model discloses a vertical connection structure for assembled sleeper board formula or track board formula ballastless track structure of damping district, manufacturing method is simple and convenient, has connected adjacent sleeper board or track board in advance through cold extrusion sleeve, has improved the assembly precision, and reduction in production cost has satisfied the needs of high efficiency production prefabricated plate.
(3) The utility model discloses a longitudinal connection structure for assembled sleeper board formula or the slab-type ballastless track structure of track of damping district, the site operation only need lay prefabricated sleeper board or track board and target in place, and the cold extrusion sleeve of installation once pours filler material, has guaranteed sleeper board or track board promptly on same horizontal plane, and site operation is fast.
(4) The utility model discloses an assembled ballastless track structure for damping district, it is through setting up a plurality of prefabricated sleeper slabs or prefabricated track board that can correspond the erection joint, make it set up along the track direction interval on track lower part basis, and correspond and set up longitudinal connection structure in order to correspond the accordant connection between double-phase adjacent prefabricated sleeper slab or prefabricated track board, and pour the concrete at the connection area, make prefabricated sleeper slab or prefabricated track board form assembled overall structure, thereby realized the effective connection of each prefabricated sleeper slab or prefabricated track board, the long slab unit structure body of same atress has been formed, the wholeness of prefabricated sleeper slab or prefabricated track board connection assembly has been guaranteed, ballastless track structure's assembly precision and reliability have been improved.
(5) The utility model discloses an assembled ballastless track structure for damping district, a plurality of prefabricated short sleeper slab intervals set up and form the sleeper slab of growth through longitudinal connection structure and connection packing part be assembled between/be connected between, the compartment sets up spacing reinforcing bar and stop sleeve, one of them is fixed with being connected the packing part for spacing reinforcing bar and stop sleeve, another is fixed with track lower part basis, form spacing reinforcing bar and stop sleeve's sliding construction, and be convenient for connect the packing part and reciprocate, realize producing the buffering of vibration to the vehicle when playing vertical and horizontal spacing, wherein connect the connection that the packing part realized promptly and realized spacingly simultaneously, the process is executed less conveniently.
(6) The utility model discloses an assembled ballastless track structure for damping section, longitudinal connection structure include longitudinal reinforcement and sleeve, through longitudinal reinforcement pre-buried in connect each other through the sleeve with another longitudinal reinforcement interval setting in the prefabricated sleeper slab at last, perhaps through with the sleeve is pre-buried in the prefabricated sleeper slab, one two are connected respectively at the both ends of longitudinal reinforcement the sleeve sets up the connection of realizing between two adjacent prefabricated sleeper slabs through reinforcing bar and telescopic flexibility.
(7) The utility model discloses an assembled ballastless track structure for damping district, it corresponds the assembly through a plurality of prefabricated sleeper slabs and forms, its totality is the assembled structure, in case ballastless track structure appears the track disease in the application of later stage, can correspondingly abolish the post-cast region of track structure disease position to unblock the prefabricated sleeper slab of this position, thereby can change or adjust the prefabricated sleeper slab or the track unit of disease position, the maintenance time and the cost of maintenance of ballastless track have been showing and have been reduced;
(8) the utility model discloses an assembled rail ballastless track structure for damping district, it is through setting up the prefabricated sleeper slab of certain length, assemble into the track unit with it, according to the difference of use area, can adopt the sleeper slab of different length specifications, and set up prefabricated sleeper slab into the short slab through adopting, can further promote the curve adaptability of prefabricated sleeper slab, reduce the kind and the quantity of non-standard plate and curved slab, reduce the prefabrication cost of sleeper slab, improve the economic nature of ballastless track structure, also make things convenient for the laying fine tuning in later stage;
(9) the utility model discloses an assembly method for assembled ballastless track structure of damping district, earlier make the sleeper slab in the mill into the short slab, transport to the construction site again, connect through longitudinal connection structure, and connect two adjacent short slabs of fixed through connecting the packing part, realize assembling the sleeper slab of growing with the sleeper slab of short rail, before the packing part is connected in the pouring, fixed spacing reinforcing bar or spacing sleeve on track lower part basis, the packing part makes it and spacing sleeve fixed connection or with spacing reinforcing bar fixed connection, spacing reinforcing bar and spacing sleeve swing joint are connected in the pouring that corresponds, thereby realize the effect to the longitudinal and transverse fixation of sleeper slab and realization buffering, the simple assembly structure of assembly method is stable.
Drawings
Fig. 1 is a schematic view of an assembled sleeper slab ballastless track structure for a vibration damping zone according to an embodiment of the present invention;
FIG. 2 is an explosion diagram of an assembled sleeper slab ballastless track structure for a vibration damping zone according to an embodiment of the present invention;
FIG. 3 is a transverse cross-sectional view and a ballastless track structure of an assembled sleeper slab for a vibration damping zone according to an embodiment of the utility model;
FIG. 4 is a schematic structural view of a first embodiment of a stop member;
FIG. 5 is a schematic structural view of a second embodiment of a stop member;
FIG. 6 is a schematic structural view of a third embodiment of a stop member;
fig. 7 is a schematic structural view of a fourth embodiment of a stop member.
FIG. 8 is a longitudinal cross-sectional view at the longitudinal attachment structure;
FIG. 9 is a top plan view of the longitudinal attachment structure;
FIG. 10 is a partial schematic view of a longitudinal joint;
the same reference numbers will be used throughout the drawings to refer to the same or like structures or parts, wherein: the track sleeper slab comprises 1-a prefabricated track sleeper slab, 101-a slab body, 102-longitudinal steel bars, 104-a cold extrusion sleeve, 1041-an extrusion rib, 2-a cast-in-place layer, 3-a track lower foundation, 301-a drainage ditch, 4-a limiting member, 401-limiting steel bars, 402-a connecting and filling part, 403-a limiting sleeve, 404-an isolating sleeve, 5-steel rails and 6-a vibration reduction layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The utility model discloses assembly type sleeper plate formula or the board-like ballastless track structure's of track overall structure sketch map is shown in fig. 1 and fig. 2 in the preferred embodiment, wherein, ballastless track structure corresponds through the prefabricated sleeper slab or the prefabricated track board along vertical interval arrangement in proper order and connects the assembly and form the utility model discloses a following preferred embodiment, preferably use prefabricated sleeper slab 1 to explain for the example, of course, prefabricated track board also can correspond through the form of setting up in following preferred embodiment and connect the assembly, forms ballastless track structure.
In the preferred embodiment of the utility model, the ballastless track structure comprises a prefabricated sleeper slab 1, a cast-in-place layer 2 and a track lower part foundation 3 which are matched and arranged in sequence; more specifically, the track lower foundation 3 in the preferred embodiment is disposed along the track direction, and may further preferably be a concrete foundation or foundation backfill layer formed by pouring cement concrete, for bearing the prefabricated tie plate 1 and the steel rail 5 disposed on the tie plate 1, and the train running on the steel rail 5; in the preferred embodiment, the width and thickness of the lower rail foundation 3 are not specifically limited, and can be preferred according to actual needs, so that the details are not repeated herein; further preferably, as shown in fig. 3, a drainage ditch 301 is correspondingly arranged on the track lower base 3, and accumulated water in the track is eliminated and reduced, the drainage ditch 301 in the preferred embodiment may be further preferably arranged along the track direction, and is preferably arranged in the middle of the track lower base 3; of course, the drainage ditch 301 may also be preferably arranged in two sides of the rail lower part foundation 3 side by side, or arranged on any side of the rail lower part foundation 3, which may be preferred according to actual needs, and will not be described herein.
Further, the cast-in-place layer 2 in the preferred embodiment is arranged between the prefabricated sleeper slab 1 and the track lower foundation 3, and can be obtained by placing the prefabricated sleeper slab 1 on the track lower foundation 3 and pouring after corresponding connection, rough adjustment and fine adjustment, so that the prefabricated sleeper slab 1 and the track lower foundation 3 are tightly attached to bear the vertical force transmitted on the prefabricated sleeper slab 1, the effects of buffering stress and uniform stress are achieved, the adjustment of the prefabricated sleeper slab 1 in the construction process can be fully realized by the cast-in-place layer 2, the levelness or the flatness of each position track in the ballastless track is ensured, and the running smoothness of the track is ensured; in the preferred embodiment, after the prefabricated sleeper plates 1 are correspondingly placed on the track lower foundation 3, the distance between each prefabricated sleeper plate 1 and the track lower foundation 3 is adjusted, so that the steel rails 5 arranged on each prefabricated sleeper plate 1 can be correspondingly connected, and the corresponding splicing precision of the track is ensured; further specifically, in a preferred embodiment, after the prefabricated sleeper slab 1 is arranged on the track lower foundation 3, a certain distance is reserved between the prefabricated sleeper slab 1 and the track lower foundation 3, then rough adjustment and fine adjustment are performed on the prefabricated sleeper slab 1, and concrete with a corresponding thickness is poured in a space reserved between the prefabricated sleeper slab 1 and the track lower foundation, so that a cast-in-place layer 2 of the ballastless track structure is formed.
Further preferably, in order to improve the connection reliability between the cast-in-place layer 2 and the precast sleeper slab 1 and the track lower foundation 3, in a preferred embodiment, the lower surface of the precast sleeper slab 1 and/or the upper surface of the track lower foundation 3 are/is subjected to roughening treatment, that is, the roughness of the lower surface of the precast sleeper slab 1 and/or the roughness of the upper surface of the track lower foundation 3 are/is increased, the flatness is reduced, the static friction force of the cast-in-place layer 2 connected with the precast sleeper slab 1 and the track lower foundation 3 is increased, the connection stability of the cast-in-place layer 2 with the precast sleeper slab 1 and the track lower foundation 3 is further improved, the precast sleeper slab 1 and the track lower foundation 3 form the same track structure stress body through the cast-in-place layer 2, and the stress stability of the ballastless track structure is further improved.
Further, the precast sleeper slab 1 in the preferred embodiment is as shown in fig. 1-2, and is a slab-shaped structure, and the precast sleeper slab 1 is preferably a non-prestressed slab, and of course, it may also be provided in the form of a prestressed slab, which may be implemented by using related technical means in the prior art according to actual needs; furthermore, a plurality of prefabricated sleeper plates 1 can be sequentially arranged on a lower foundation 3 of the track at intervals along the track direction and correspondingly connected in series to form an integral ballastless track structure, and two adjacent prefabricated sleeper plates 1 are aligned in side face and then connected in a matching manner; further, a plurality of pairs of fastener rail bearing platforms capable of correspondingly mounting the steel rail 5 are arranged at the top of the prefabricated sleeper slab 1 at intervals along the rail direction in the preferred embodiment, the number of the fastener rail bearing platforms arranged at intervals on the prefabricated sleeper slab 1 in the preferred embodiment is 4, of course, the number of the fastener rail bearing platforms arranged on the prefabricated sleeper slab 1 may be optimized according to the length of the prefabricated sleeper slab 1 or the interval between two adjacent fastener rail bearing platforms, for example, 2 pairs, 3 pairs, 5 pairs, 6 pairs, 7 pairs, 8 pairs, 9 pairs, 10 pairs, and further, 4 to 6 pairs may be specifically optimized.
Further, a longitudinal connecting structure is arranged between two adjacent prefabricated sleeper plates 1 in the preferred embodiment, which may be further specifically longitudinal steel bars 102 respectively arranged on the side surfaces of the two prefabricated sleeper plates 1 in the preferred embodiment, which may be correspondingly connected, the longitudinal steel bars 102 are arranged along the length direction of the prefabricated sleeper plates 1, that is, along the track direction of the ballastless track structure, and the longitudinal steel bars 102 are arranged on the side surfaces of the prefabricated sleeper plates 1 at intervals in the preferred embodiment, and then after the two prefabricated sleeper plates 1 are aligned, the longitudinal steel bars 102 on the opposite side surfaces of the two prefabricated sleeper plates 1 may be respectively aligned, and then the corresponding connection is realized; further preferably, in the preferred embodiment, sleeves are provided corresponding to the two aligned longitudinal steel bars 102, one end of each sleeve can be correspondingly connected to one longitudinal steel bar 102 on the side surface of one of the prefabricated sleeper slabs 1, and the other end of each sleeve can be correspondingly connected to the corresponding longitudinal steel bar 102 on the side surface of the other prefabricated sleeper slab 1, so that the two prefabricated sleeper slabs 1 can be correspondingly connected through the sleeves.
As shown in fig. 8, 9 and 10, it is further preferable that longitudinal steel bars 102 are embedded in two adjacent precast sleeper slabs 1 in the preferred embodiment and extend out of the end face, and are arranged at intervals with another matched longitudinal steel bar 102, and the two longitudinal steel bars 102 are longitudinally connected through a cold extrusion sleeve 104; the internal diameter of the cold extrusion sleeve 104 is greater than the external diameter of the longitudinal steel bars 102, the butt ends of the two longitudinal steel bars 102 are respectively inserted into the two ends of the cold extrusion sleeve 104, and under the extrusion of the portable extruder, the cold extrusion sleeve 104 is deformed and locked, and a plurality of extrusion ribs 1041 are formed outside. Preferably, the portion of the butt end of the longitudinal rebar 102 inserted into the cold extrusion sleeve 104 includes at least three turns of threads to ensure the locking force.
Of course, the connection of the longitudinal steel bars 102 is not limited to the above form, and it is also possible to realize the longitudinal connection of the two precast sleeper slabs 1 by providing overlapping joints corresponding to the longitudinal steel bars 102 and welding the two longitudinal steel bars 102 at the two ends of the overlapping joints respectively; moreover, the longitudinal connecting structure is not limited to the form of arranging the longitudinal reinforcing bars 102, and may be preferably in another form according to actual needs, for example, in another preferred embodiment, connecting plates are respectively arranged on the side surfaces of the two prefabricated sleeper plates 1, and then longitudinal bolts are correspondingly arranged to correspondingly connect the two prefabricated sleeper plates 1, so as to realize the longitudinal connection of the prefabricated sleeper plates 1; in still another preferred embodiment, the prefabricated sleeper slab 1 is assembled and connected by pre-burying structures, such as pre-buried steel plates, pre-buried iron pieces and the like, at the slab end of the prefabricated sleeper slab 1 and forming firm and reliable connection in a later period through bolting, welding, hinging or the like.
Further, the side surface of the prefabricated sleeper slab 1 in the preferred embodiment for connection is provided with a plurality of longitudinal steel bars 102, which are respectively arranged at two ends of the side surface, and the number of the longitudinal steel bars 102 respectively arranged at two ends of the side surface in the preferred embodiment is 4, that is, the number of the longitudinal steel bars 102 arranged on the connecting end surface of the prefabricated sleeper slab 1 is 8, then the two prefabricated sleeper slabs 1 can be correspondingly connected through 8 sleeves after being aligned, and the longitudinal steel bars 102 and the sleeves correspondingly form a longitudinal connecting structure in the preferred embodiment, so that the longitudinal connection of the prefabricated sleeper slabs 1 is realized, and then an integral unit along the track direction is formed; of course, the longitudinal reinforcements 102 between the two prefabricated sleeper slabs 1 may be all correspondingly matched and connected by sleeves, or may be partially correspondingly connected by sleeves.
Further, by the corresponding connection of the longitudinal connection structures, a plurality of prefabricated sleeper plates 1 can be correspondingly connected into long plate units with a certain length along the longitudinal direction, and then the ballastless track structure in the preferred embodiment can be formed by correspondingly combining one or more long plate units; further, the long slab unit in the preferred embodiment can form an integral stress structure through the cast-in-place layer 2 and the track lower foundation 3, that is, a track unit is formed, then the ballastless track structure can be formed by correspondingly assembling a plurality of track units arranged along the longitudinal direction, and each track unit is respectively used as the integral stress structure to complete the stress of the ballastless track structure.
Further, in a preferred embodiment, a plate seam is provided between each long plate unit, and a limiting structure is correspondingly provided in the plate seam to correspondingly limit the long plate units, the limiting structure may further be a boss, a cylindrical member, or the like, the limiting structure may be selectively provided, or may be provided in each plate seam, which may be preferred according to actual conditions, and is not described herein.
Of course, the position limitation of the long plate unit is not limited to the arrangement of the above-mentioned position limitation structure, and it can be arranged in other forms according to actual needs, for example, in a preferred embodiment, the position limitation structures are respectively arranged on both sides of the long plate unit, and the position limitation of the long plate unit is realized by the position limitation structures on the side edges of the long plate unit corresponding to the lower foundation of the connecting track, and the position limitation structures can be further preferably vertically arranged on the anchoring steel bars or connecting bosses on the side surfaces of the precast sleeper slab 1; correspondingly, in another preferred embodiment, the through hole structure can be vertically arranged on the plate surface of the partial or all prefabricated sleeper plates 1 in the long plate unit or the sleeve communicated with the two plate surfaces is arranged, so that after the long plate unit is assembled in place, the long plate unit can be limited by planting bars in the through holes or the sleeve or arranging limiting steel nails, and the bars planted with the bars or the limiting steel nails are correspondingly matched into the foundation of the lower part of the track, so that the limitation and the stability of the long plate unit are ensured. In addition, the limit of each long plate unit can be set in other forms according to actual needs, which is easy to be realized by using related technical means in the prior art, and thus, the detailed description is omitted.
Further, after the two adjacent prefabricated sleeper plates 1 in the preferred embodiment are correspondingly connected through the longitudinal connecting structure, connecting and filling parts can be arranged corresponding to the longitudinal connecting structure, and the connecting and filling parts are preferably obtained by casting reinforced concrete in situ in a space between the two prefabricated sleeper plates 1; of course, in the preferred embodiment, the connection filling portions may be correspondingly disposed between the two lateral ends of all the spacers, or the connection filling portions may be correspondingly disposed between the two lateral ends of only a part of the spacers, which may be preferred according to actual situations; further preferably, in the preferred embodiment, before the reinforced concrete is cast in place on the longitudinal connecting structure, the circumferential stirrups may be preferably arranged on the longitudinal connecting structure to connect the plurality of longitudinal connecting structures in the two-plate partition area into an integral structure, the number of the circumferential stirrups may be one, or may be a plurality of circumferential stirrups arranged at intervals in the longitudinal direction, and the connection form between the circumferential stirrups and the longitudinal connecting structure is not specifically limited, and may be welded or bound, and is not specifically limited herein; further, after the longitudinal connecting structures of the two adjacent prefabricated sleeper slabs are correspondingly connected and the hoop stirrups and the longitudinal connecting structures are connected in a matched mode to form the integral frame structure, the cast-in-place reinforced concrete is correspondingly arranged on the integral frame structure, so that the setting stability of the connecting and filling part between the two prefabricated sleeper slabs 1 is higher, the plurality of prefabricated sleeper slabs 1 can correspondingly form a stable long slab unit, namely, the same stress structure body is formed, the prefabricated sleeper slabs 1 in the long slab unit are not stressed independently but stressed integrally, and the stress stability of the long slab unit and even the ballastless track structure is ensured.
Further preferably, the plate body 101 is correspondingly provided with notches on the side surfaces for matching connection, the notches are preferably semi-annular, and after the two prefabricated sleeper plates 1 are aligned with the side surfaces and matched connection, the two notches on the two opposite side surfaces can be respectively aligned and form an annular notch, as shown in fig. 1, the corresponding notches formed by combination are provided with corresponding cover plates, so that the area between the two steel rails 5 on the ballastless track structure is horizontal, the walking is facilitated, and the garbage on the sleeper surface is reduced to fall into the drainage ditch 301.
Further preferably, prefabricated sleeper slab 1 is used for the both sides terminal surface middle part correspondence of accordant connection to set up the breach of semicircular, the setting of breach makes the both ends of each terminal surface form protruding structure respectively, then each vertical reinforcing bar 102 can correspond the setting on the terminal surface of two protruding structures, when two prefabricated sleeper slabs 1 correspond to the connection promptly, can correspond the protruding structure that makes two prefabricated sleeper slabs 1 tip and adjust well, then make the vertical reinforcing bar 102 that corresponds on the protruding structure adjust well respectively, thereby realize that prefabricated sleeper slab 1 connects with the correspondence of vertical reinforcing bar 102.
In the above preferred embodiment, the connection between two adjacent prefabricated sleeper slabs 1 is realized by pre-embedding the longitudinal steel bars 102 on the end surface of each prefabricated sleeper slab 1, which is a preferred mode in the embodiment of the present invention, but not the only setting mode, for example, in another preferred embodiment, by correspondingly arranging sleeves on the end surface of each prefabricated sleeper slab 1, after the two prefabricated sleeper slabs 1 are correspondingly arranged on the rail lower foundation 3, the sleeves on the opposite sides of the two prefabricated sleeper slabs 1 are respectively aligned, and then correspondingly arranging the longitudinal steel bars in each set of aligned sleeves, so that one end of the longitudinal steel bars is correspondingly connected to the sleeve on the side of one prefabricated sleeper slab 1, and the other end of the longitudinal steel bars is connected to the corresponding sleeve on the side of the other prefabricated sleeper slab 1, so that the two prefabricated sleeper slabs 1 can be correspondingly connected by correspondingly matching a plurality of sets of sleeves with the longitudinal steel bars, and longitudinal steel bars are correspondingly connected and arranged in each group of sleeves respectively.
Certainly, vertical reinforcing bar or the pre-buried setting of sleeve accessible on the prefabricated sleeper slab 1 terminal surface also can set up through other forms, if set up the connecting plate on the terminal surface of prefabricated sleeper slab 1, realize the location with the corresponding welding of vertical reinforcing bar or telescopic one end on the connecting plate then.
In order to meet the requirements of vibration reduction areas, a vibration reduction layer 6 is arranged between a cast-in-place layer 2 and a track lower foundation 3, the vibration reduction layer 6, a self-compacting concrete layer 2 and a reinforced concrete backfill layer 3 are not fixed, and vibration generated by train operation is buffered through the arrangement of the vibration reduction layer 6. Preferably, the damping layer can be point support, strip support or face support type, and damping layer 6 sets up in post-cast layer lower part, pours the post-cast layer and constitutes unified structure with damping layer 6, has improved orbital participation of shaking quality, for construction convenience, can apply earlier and do the post-cast layer for make level to the lower part basis, then directly set up the damping layer, adjust the track board system, through the setting of damping layer 6 the vibration that the operation of buffering train produced.
The plurality of prefabricated sleeper slabs or prefabricated track slabs are arranged at intervals in the longitudinal direction, the connecting and filling parts 402 are respectively arranged at the two transverse ends of part or all of the spacing areas, the limiting members 4 are arranged at the part or all of the spacing areas, further, the number of the limiting members can be one or more, optimization can be carried out according to the arrangement form or the actual needs of the limiting members, the limiting members can be arranged at the spacing areas between the prefabricated sleeper slabs 1 along the track direction of the ballastless track, or the limiting members are arranged in the part of the spacing areas, optimization can be carried out according to the actual needs, and repeated description is omitted.
The limiting component 4 comprises a limiting steel bar 401 and a limiting sleeve 403, a connecting and filling part 402 is connected with two adjacent plate bodies 101 into a whole through a longitudinal connecting structure 102 connecting the two adjacent plate bodies, the connecting and filling part 402 is arranged on the cast-in-place layer 2 and the vibration damping layer 6 so as to be suitable for the up-and-down displacement generated by vibration, the limiting steel bar 401 and the limiting sleeve 403 are matched and connected with the filling part 402, wherein the limiting steel bar 401 and the limiting sleeve 402 are matched and arranged to form an integral vertical implanted structure in a connecting gap, the transverse and longitudinal limiting is realized through matching with the connecting and filling part 402, the vertical implanted structure is movably connected with the part of the track lower part foundation 3, namely one of the limiting steel bar 401 and the limiting sleeve is fixedly connected with the track lower part foundation 3, and the other one of the limiting steel bar 401 and the limiting sleeve is movably connected with the track lower part foundation, therefore, the vertical implanted structure can be ensured to be movable in the vertical direction while realizing the transverse and longitudinal limiting, thereby better buffering the vibration generated by the train operation.
In the first embodiment of the limiting member 4, as shown in fig. 4, a limiting sleeve 403 is fixedly arranged in the connection filling part 402, the height of the limiting sleeve 403 is flush with the height of the connection filling part 402, the bottom of the limiting sleeve 403 is not connected with the track lower foundation 3, the connection filling part 402 is a later-stage pouring structure, the limiting sleeve 403 is placed in a gap between the protrusions before pouring, and the connection filling part 402 with the height flush with the limiting sleeve 403 is formed by pouring; limiting steel bars 401 are arranged in the limiting sleeve 403, the bottoms of the limiting steel bars are fixed in the track lower portion foundation 3 to achieve transverse limiting and longitudinal limiting, the bottoms of the limiting steel bars 401 are fixedly connected with the track lower portion foundation 3 in a plurality of ways, and preferably, the bottoms of the limiting steel bars 401 are fixedly connected with the track lower portion foundation 3 through threads.
Further, in the second embodiment, as shown in fig. 5, the limiting steel bar 401 is a T-shaped limiting screw, the head of the T-shaped limiting screw is disposed at the top of the limiting sleeve 403, and the head of the T-shaped limiting screw is not connected with the limiting sleeve 403 and the connecting and filling part 402, so that the up-and-down movement of the connecting and filling part 402 is not limited, thereby buffering the vibration generated by the train operation and simultaneously realizing the transverse and longitudinal limiting. In the third embodiment, as shown in fig. 6, the bottom of the limiting steel bar 401 or the inverted T-shaped limiting screw is disposed in the track lower foundation 3 to fix the limiting steel bar 401, and the top of the limiting steel bar 401 is not connected with the connection filling part and the limiting sleeve 403 in a sliding manner.
In the fourth embodiment of the limiting member 4, as shown in fig. 7, the limiting steel bar 401 is arranged in the connecting and filling part 402, the top of the limiting steel bar 401 is fixedly connected with the connecting and filling part 402, the bottom of the limiting steel bar 401 is arranged at an interval with the damping layer 6, and the bottom of the limiting steel bar 401 is higher than the damping layer 6; spacing sleeve 403 is fixed on track lower part basis 3, spacing sleeve 403 is not fixedly connected with connection filling part 402, be equipped with isolating sleeve 404 between spacing sleeve 403 and the connection filling part 402, spacing sleeve and isolating sleeve 404 sliding connection, and the height of spacing sleeve 403 is less than the height of connection filling part 401, spacing reinforcing bar 401 is arranged in spacing sleeve 403, spacing reinforcing bar 401 and the matching of spacing sleeve 403 in locating connection filling part 402 realize horizontal and vertical spacing, realize connecting filling part 402 through connecting spacing reinforcing bar 401 and damping layer 6 interval height and reciprocate simultaneously, with the vibration that the buffering train operation produced.
As another aspect of the present invention, an assembling method for a prefabricated sleeper slab ballastless track of a vibration damping zone includes the following steps:
s1, carrying the prefabricated sleeper plates 1 manufactured in a factory to a construction site, and carrying out initial adjustment and positioning after a preset number of the prefabricated sleeper plates are longitudinally arranged along a line;
s2: connecting the longitudinal steel bars 102 pre-embedded in the precast sleeper slab 1 together through a plurality of cold extrusion sleeves 104 for fine adjustment and positioning;
s3, arranging a plurality of limiting steel bars on the basis of the lower part of the track of a part or all of the spacers, sleeving limiting sleeves on the limiting steel bars, respectively pouring reinforced concrete on the transverse two ends of the spacers in the spacers which are simultaneously provided with the longitudinal connecting structures and the limiting members in situ, and wrapping and covering the longitudinal connecting structures, the limiting steel bars and the limiting sleeves; after curing, forming the connecting and filling part, and integrally forming the connecting and filling part and the connecting and filling part to realize simultaneous limiting and connecting; respectively pouring fillers at the transverse two ends of the interval area which is partially or completely not provided with the limiting reinforcing steel bars in situ, and wrapping and covering the longitudinal connecting structure; the method comprises the steps that integration, transverse/longitudinal limiting and vertical elastic deformation are simultaneously completed through one-time cast-in-place, so that a plurality of prefabricated sleeper plates are assembled to form a track unit with a preset length and form a same stressed structure body;
or,
arranging a plurality of limiting sleeves on the basis of the lower part of the track of a part or all of the spacing areas, placing limiting reinforcing steel bars in the limiting sleeves, arranging protection outside the limiting sleeves, respectively pouring reinforced concrete on site at the two transverse ends of the spacing areas in the spacing areas which are simultaneously provided with the longitudinal connecting structures and the limiting members, and wrapping and covering the longitudinal connecting structures, the limiting reinforcing steel bars and the limiting sleeves; after curing, forming the connecting and filling part, and integrally forming the connecting and filling part and the connecting and filling part to realize simultaneous limiting and connecting; respectively pouring reinforced concrete on the horizontal two ends of the spacing area which is partially or completely not provided with the limiting sleeve in situ, and wrapping and covering the longitudinal connecting structure; and the integration, the transverse/longitudinal limiting and the vertical elastic deformation are simultaneously completed through one-time cast-in-place, so that a plurality of prefabricated sleeper plates are assembled to form a track unit with a preset length and form a same stressed structure body.
The utility model provides an assembled sleeper plate-type ballastless track structure and assembly method thereof, its ballastless track's simple structure, assembly method is simple and convenient, through setting up ballastless track structure into the form of a plurality of sleeper plate intercommissurs to rapid Assembly obtains ballastless track structure, effectively is applicable to the application environment of subway. The utility model provides a sleeper slab, it is through prefabricating the shaping, and then the assembly of ballastless track structure is accomplished to the form of assembly, and the assembly form is simple, and assembly efficiency is high, can promote ballastless track structure's assembly efficiency by a wide margin, shortens the cycle of assembly, and through corresponding the vertical connection structure that sets up on the both sides terminal surface of prefabricating sleeper slab, makes and can correspond the connection through vertical connection structure between two sleeper slabs, has effectively realized the connection of sleeper slab; the limiting members are correspondingly arranged at the positions of the two sleeper plates which are mutually connected, the longitudinal positions of the sleeper plates are limited by the limiting members, the stability of rail operation is effectively guaranteed, the operation precision of a rail is ensured, the limiting members and the longitudinal connecting structure can be integrally formed, the limitation and the connection of the sleeper plates can be simultaneously realized, the setting period of the sleeper plates is greatly shortened, and the setting efficiency of ballastless rails is improved
The bottom of the limiting steel bar 401 is fixed in a foundation at the lower part of the track, the limiting steel bar 401 is fixed in a threaded connection mode or in a pouring mode, the limiting steel bar 401 is sleeved in the limiting sleeve 403, and the limiting sleeve 403 is fixedly connected with the connecting and filling part 402.
Wherein, be equipped with high interval between spacing reinforcing bar 401's bottom and the track lower part basis 3, spacing reinforcing bar 401 with be connected filling part 402 and be connected, spacing sleeve 403 and track lower part basis 3 fixed connection, spacing reinforcing bar 401 and spacing sleeve 403 sliding connection to spacing reinforcing bar 401 moves with the buffering vibration along with connecting filling part 402 and reciprocate.
Preferably, the connecting filling part 402 is reinforced concrete, and the connecting filling part 402 adopts a cast-in-place concrete process.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (8)
1. Damping section contain assembled ballastless track structure of cold pressing indulge even, its characterized in that: the assembly type ballastless track structure is an assembly type sleeper plate or track plate type ballastless track structure;
the device comprises a prefabricated sleeper slab or a prefabricated track slab, a cast-in-place layer, a vibration damping layer, a track lower foundation, a connection filling part and a longitudinal connection structure of the prefabricated sleeper slab or the prefabricated track slab; the prefabricated sleeper plates or the prefabricated track plates are longitudinally arranged at intervals, and the transverse ends of the prefabricated sleeper plates or the prefabricated track plates in the interval area are respectively assembled and connected with each other through a longitudinal connecting structure; in part or all of the interval areas, a reinforced concrete structure is adopted as a connecting and filling part, so that the connecting and filling part and the prefabricated sleeper slab or the prefabricated track slab form an assembled integral structure, and the prefabricated sleeper slab or the prefabricated track slab forms a same stressed long slab unit structure body;
the longitudinal connecting structure comprises longitudinal steel bars and a cold extrusion sleeve; longitudinal steel bars are pre-embedded in two adjacent prefabricated sleeper plates or prefabricated track plates, extend out of the end faces and are arranged at intervals with the other matched longitudinal steel bar, and the two longitudinal steel bars are longitudinally connected through a cold extrusion sleeve;
the internal diameter of the cold extrusion sleeve is larger than the external diameter of the longitudinal steel bars, the butt joint ends of the two longitudinal steel bars are respectively inserted into the two ends of the cold extrusion sleeve, and the cold extrusion sleeve is deformed and locked under the extrusion of the portable extruder.
2. The assembled ballastless track structure of vibration damping zone containing cold-pressed longitudinal joints according to claim 1,
connecting and filling parts are respectively arranged at the two transverse ends of at least part of the interval area, and protruding limiting steel bars are arranged on the upper surface of the track lower foundation of at least part of the interval area; the longitudinal connecting structure, the limiting steel bars and the limiting sleeves are all coated in the same connecting and filling part, and the longitudinal connecting structure, the limiting steel bars and the limiting sleeves are integrally formed to realize simultaneous limiting and connection, so that a plurality of prefabricated sleeper plates or prefabricated track plates are assembled to form a track unit with a preset length and form a same stressed structure body;
or,
the transverse two ends of at least part of the interval area are respectively provided with a connecting filling part, and the upper surface of the lower part foundation of the track of at least part of the interval area is provided with a protruding limiting sleeve; and in the interval area that is provided with connection filling part and stop component simultaneously, connect the filling part and bury limiting steel bar underground, limiting sleeve's outer wall with connect the filling part contactless, limiting steel bar slidable sets up in limiting sleeve, vertical connection structure, limiting steel bar, limiting sleeve all is cladded in same connect the filling part, four integrated into one piece realize spacing and connection simultaneously to a plurality of prefabricated sleeper slab or prefabricated track board assemble the track unit that forms predetermined length and form same atress structure.
3. The assembled ballastless track structure of vibration damping zone containing cold pressing longitudinal joint of claim 2, wherein the prefabricated sleeper slab or the prefabricated track slab comprises a plurality of pairs of fastener rail bearing platforms.
4. The assembled ballastless track structure with cold-pressed longitudinal connection of the vibration damping section according to claim 3, wherein the prefabricated sleeper slab or the prefabricated track slab is provided with notches at both longitudinal ends, and the notches are provided with cover plates to form a smooth evacuation channel.
5. The assembled ballastless track structure of vibration damping zone containing cold-pressed longitudinal joint as claimed in claim 4, wherein said track lower base is provided with a drainage ditch along its longitudinal direction.
6. The assembled ballastless track structure of vibration damping zone containing cold pressing longitudinal joint of claim 4, wherein the lateral both sides of the prefabricated sleeper slab or the prefabricated track slab are provided with drainage ditches.
7. The assembled ballastless track structure of the vibration damping zone comprising the cold pressing longitudinal connection of claim 2, wherein the two sides of the long plate unit are provided with first limiting structures, or the plate is provided with second limiting structures.
8. The assembled ballastless track structure of the vibration damping zone containing the cold pressing longitudinal connection of claim 2, wherein slab joints are arranged between a plurality of adjacent track units, and a third limiting structure is arranged in part or all of the slab joints.
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| CN201921557727.4U CN211340219U (en) | 2019-09-19 | 2019-09-19 | Assembled ballastless track structure containing cold pressing longitudinal connection of vibration reduction section |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761119A (en) * | 2019-09-19 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Cold-pressed longitudinal-connection-containing assembly type ballastless track structure of vibration reduction section and assembly method |
| CN117168257A (en) * | 2023-11-02 | 2023-12-05 | 华侨大学 | Blasting vibration reduction device for interchange tunnel and vibration reduction method thereof |
-
2019
- 2019-09-19 CN CN201921557727.4U patent/CN211340219U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761119A (en) * | 2019-09-19 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Cold-pressed longitudinal-connection-containing assembly type ballastless track structure of vibration reduction section and assembly method |
| CN117168257A (en) * | 2023-11-02 | 2023-12-05 | 华侨大学 | Blasting vibration reduction device for interchange tunnel and vibration reduction method thereof |
| CN117168257B (en) * | 2023-11-02 | 2024-02-13 | 华侨大学 | Blasting vibration reduction device for interchange tunnel and vibration reduction method thereof |
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