CN105525541A - Novel prefabricated plate type damping track structure for rail traffic - Google Patents

Abstract

A novel prefabricated slab-type damping track structure for rail transit, which is composed of steel rails, fasteners, prefabricated panels, elastic cushions, sealing sleeves, longitudinal connection devices, filling layers and the like. The elastic cushion and prefabricated panels can be combined into one in the factory. The track plate can reserve holes through the thickness direction of the track plate to pour the filling layer, observe the pouring state, install the reserved holes for the support legs, install the holes for the measurement and positioning marks, the centering marks for the laying and positioning, and the composite connection of the elastic cushion Embedded parts used for lifting, hanging nails for lifting, embedded parts for longitudinal connection of track slabs, embedded parts for installing contact rails, etc.; The characteristics of fast construction speed, high precision, good track smoothness and low labor intensity are in line with the current direction of environmental protection, high efficiency and disease reduction of rail transit. It can effectively reduce the vibration and secondary structure noise problems caused by the operation of urban rail transit vehicles.

Description

New type prefabricated slab damping track structure for rail transit

technical field

The invention relates to the field of vibration reduction of rail traffic, in particular to a novel prefabricated slab type vibration-damping track structure for rail traffic.

Background technique

With the large-scale network development of urban rail transit, the construction period of urban rail transit is becoming increasingly tight. The construction process of the track structure is closer to the opening and operation time, and the pressure on the construction period is particularly prominent. Generally, the track laying period of about 9 months for a subway line is often compressed. It takes 6 months or even less. The traditional track structure determines the characteristics of many construction operations, manual work, difficult control of construction accuracy and slow construction progress. When the overall construction period and track-laying period are compressed, the construction accuracy and track-laying quality are seriously affected, resulting in the deterioration of the smoothness of the line put into operation and the comfort of running vehicles, and the frequent occurrence of track diseases, and the aggravation of environmental vibration and noise problems .

The traditional vibration-absorbing track structure adopts the construction method of binding steel bars on site and pouring concrete. Generally, the daily construction speed is 25m to 50m, and the number of construction personnel is 80 to 100. The narrow and large number of manual work links lead to low construction accuracy, low work efficiency, and high safety risks, and the cost of design, construction, and maintenance also increases. In addition, line diseases in the cast-in-place vibration-damping track section occur from time to time, such as the track bed is easy to crack.

For this reason, the designer of the present invention has proposed a kind of prefabricated slab type damping track structure system structure, and the rapid construction method and construction equipment that are matched with this structure, to overcome the current There are many defects in the damping track structure.

Contents of the invention

The object of the present invention is to provide a new type of prefabricated slab type damping track structure with adjustable damping performance for rail transit. The track structure is suitable for various track vibration reduction requirements. It adopts factory manufacturing and realizes highly automated special equipment laying. It has the characteristics of fast construction speed, high track structure precision, and good line smoothness. It can effectively overcome the existing track structure (including vibration-damping and non-vibration-damping track structures).

In order to solve the above problems, the present invention discloses a novel prefabricated slab-type damping track structure for rail transit, which sequentially includes a filling layer, an elastic cushion and a track slab, and is characterized in that:

The elastic cushion layer is laid on the filling layer, and the track plate is arranged on the elastic cushion layer for vibration reduction. The elastic cushion layer is made of elastic materials such as rubber or polyurethane;

Two parallel steel rails are arranged on the track plate, and each steel rail is respectively fixed on the track plate by a plurality of fasteners.

Wherein: the elastic cushion is surface support or point support or strip support. In surface support, the lower surface of the track plate is tiled on the entire upper surface of the elastic cushion. In point support, the elastic cushion includes A plurality of rectangular parallelepiped, cylinder, circular truncated or truncated truncated elastic pads, the lower surface of the track plate is laid on the multiple elastic pads, and in the strip support, the elastic pad includes at least Two parallel elastic support strips, the lower surface of the track plate is laid on the top surface of the two elastic support strips.

Among them: the upper surface of the track slab is in the form of a horizontal plane or a herringbone slope surface, the section of the track slab is polygonal, the two sides of the circular tunnel section are slope structures to enhance the adaptability to the tunnel section, and the section of the track slab in the rectangular and horseshoe section section is rectangular The cross-section or both sides are in the form of slopes like the circular tunnel cross-section.

Among them: the spacing of steel bars in the panel is arranged according to a certain modulus and shape to realize the automatic production of steel mesh in the panel.

Among them: the track slab has 1-3 holes through the thickness direction of the track slab for the pouring of the filling layer under the slab, the position reservation of the fixed piles, and the observation of the pouring of the filling layer under the slab.

Among them: the track plate is the installation condition reserved for the temporary positioning of the support legs. The installation of the support legs is through the installation of the sleeve device in the plate or on the side of the plate, and the thread on the support leg is fixed and adjusted by engaging with the thread in the sleeve. .

Among them: there are pre-embedded conditions for automatic measurement and positioning marks on the track plate, which are realized by pre-embedding bushings in the board or directly using bushings for installing fasteners.

Among them: there are centering marks on the track plate for the positioning of the plank.

Among them: there are 3-4 special lifting nails for pre-embedded lifting on the track plate.

Among them: the end of the track plate is reserved for the embedded parts for longitudinal connection.

Among them: there are pre-embedded components for pre-embedded installation of contact rails.

Among them: the spacing of steel bars in the plate is arranged according to a certain modulus, which is convenient for the automatic production of steel mesh.

Among them: the pre-embedded parts for the composite connection of the pre-embedded elastic cushion, the connection pre-embedded parts are bolt sleeves, fixed ends of expansion bolts, simple expansion bolts or wooden pre-embedded piles, or through reserved grooves or pre-embedded grooves The way to realize the composite of prefabricated panels and elastic pads.

Among them: the connection between the damping cushion and the track plate adopts a unique connection method that does not affect the performance of the damping cushion.

Among them: the composite damping cushion at the bottom of the track slab and the side cushion are designed separately or integrated with unequal rigidity.

Thus, the vibration damping performance of the novel prefabricated slab damping track structure system of the present invention is adjustable, and it is suitable for laying manual or automatic special equipment. It is supported by adjustable temporary vertical support devices (support legs). It includes factory prefabricated high-precision track slabs, elastic cushions on the surface of track slabs compounded in a special way (in-plant compounding or construction site compounding), temporary vertical support devices with adjustable support heights, and post-cast track slab fixing piles And cast-in-place self-compacting concrete at the lower part of the track slab or other solid backfill materials with good fluidity. The main construction process sequence of the new prefabricated slab damping track is: producing the prefabricated track slab structure in the factory or on site → compounding the vibration damping cushion in the factory or on site → using special planking equipment for high precision positioning of the track slab → using vertical support devices Temporary fixation of the track slab → pour the concrete fill layer under the track slab in one or several batches.

1. The characteristics of the new prefabricated slab damping track structure system are:

1) Prefabricate high-precision reinforced concrete track slabs with high-precision molds in the factory or on site.

2) The upper surface of the track plate is in the form of a horizontal plane or a herringbone slope. The section of the track slab is polygonal, and both sides of the circular tunnel section are slope surface structures to enhance the adaptability to the section of the tunnel. In the form of a slope.

3) The surface of the track plate is provided with a special rail-supporting boss, and fasteners for connecting the rails are installed on the boss.

4) The steel bar spacing in the panel is arranged according to a certain modulus (such as 25mm, 50mm integer multiple) and shape, which realizes the automatic production of the steel mesh in the panel.

5) Corresponding holes and pre-embedded parts are reserved on the track plate to meet special construction and use needs, mainly including the following aspects (optional according to specific needs):

(1) Install the embedded parts of the rail fastener (nylon sleeve, etc.);

(2) 1-3 holes running through the thickness direction of the track slab (for pouring of the filling layer under the slab, reservation of fixed pile positions, observation of pouring of the filling layer under the slab, etc.);

(3) Reserve installation conditions for the installation of temporary positioning vertical support devices. The vertical supports can be mounted close to the panel or to the side of the panel.

(4) Pre-embedded installation conditions for automatic measurement positioning marks. It is realized by pre-embedding the casing in the plate or directly using the casing for installing fasteners;

(5) Alignment marks for positioning of track slabs;

(6) Embedded parts for pre-embedded elastic cushion composite connection. The pre-embedded parts can be bolt sleeves, fixed ends of expansion bolts, simple expansion bolts or even wooden pre-embedded piles, etc., and the composite of prefabricated panels and elastic pads can also be realized through reserved grooves or pre-embedded channels;

(7) 3-4 special lifting nails for pre-embedded lifting;

(8) Reserve embedded parts for longitudinal connection of track slabs;

(9) Embedded parts for pre-embedded installation of contact rails (if necessary), etc.

2. Compound the damping cushion on the bottom and side of the prefabricated track slab in the factory or on the construction site to realize the integration of the slab and the cushion. Its main points are:

1) The damping cushion layer is made of elastic materials, including damping rubber sheets of different structures and types, polyurethane sheets and other similar materials with elasticity and damping properties;

2) In order to meet the needs of different vibration damping levels, the vibration damping cushion can be laid in three ways: full pavement at the bottom of the track slab, strip pavement and point pavement. When the elastic cushion is a surface support, the lower surface of the track plate is flatly laid on the entire upper surface of the elastic cushion. When the elastic cushion is supported by strips, the elastic cushion includes at least two parallel elastic support strips, and the lower surface of the track plate is laid on the top surface of the two elastic support strips. When the elastic cushion is a point support, it includes a plurality of rectangular parallelepiped, cylinder, circular truncated or truncated truncated elastic cushions arranged at intervals, and the lower surface of the track plate is laid on the plurality of elastic point supports;

3) The connection between the vibration-damping cushion and the track plate adopts a unique connection method that does not affect the performance of the vibration-damping cushion;

4) In order to prevent the filling concrete at the bottom from being poured into the gap of the cushion layer to cause the elastic loss or even failure of the vibration damping pad, a special elastic sealing sleeve with a "brim" at the bottom is installed at the opening part of the track plate, and the "brim" at the bottom of the sealing sleeve is " The brim of the hat "is effectively sealed and connected with the bottom surface of the shock absorbing pad. The sealing sleeve also has the function of isolating the track plate and the positioning and fixing piles, avoiding direct hard contact, and allowing the track plate to deform freely up and down without being constrained by the positioning piles, so as to achieve the elastic positioning of the track plate, avoid stress concentration, and To ensure that the elasticity of the track slab will not be lost;

5) The composite damping cushion layer at the bottom of the track slab is integrally formed with the plate end and the plate side. The damping cushion layer is formed into a boot (cover) type, and the bottom and side of the damping cushion are integrated. The main function of the side cushion is to realize the elastic isolation between the track slab and the surrounding concrete, so as to avoid concrete pouring into the bonding layer between the vibration-damping pad and the track slab during construction, and to ensure that the track slab can deform freely up and down without restraint, avoiding A damping "short circuit" occurs. The main function of the bottom cushion is to provide the elasticity of the track slab and realize the vibration reduction function of the track structure;

6) According to needs, sealing measures can be set at the exposed parts of the elastic cushion to prevent dust, dirt or groundwater from entering the bonding layer during construction and operation.

It can be seen from the above structure that the novel prefabricated slab-type damping track structure for rail transit of the present invention enables the track structure to have a damping function by introducing prefabricated track slabs and elastic damping cushions, and can well solve the vibration problem caused by rail transit , by reserving embedded parts or installation conditions for multiple functional purposes such as hoisting, plate pad compounding, track slab measurement, filling layer pouring under the track slab, slab laying and positioning, and slab fixing, etc., it is well solved. Fast, high-precision construction and the replacement of track slabs and elastic cushions in the later stage.

Details of the present invention can be obtained from the description below and the attached drawings.

Description of drawings

Fig. 1 shows the structural representation of the prefabricated damping rail structure system of the present invention

Fig. 2 shows the top view of the surface support of the present invention

Fig. 3 has shown the top view of point support of the present invention

Figure 4 shows a top view of the strip support of the present invention

Fig. 5 shows the schematic diagram when the board of the present invention is adjusted in place and fixed by the adjustment rod

detailed description

Referring to FIG. 1 , the present invention relates to a prefabricated damping track structure system. The prefabricated damping track structure system is a multi-layer design, including a filling layer 1 , an elastic cushion layer 4 and a track plate 6 from bottom to top.

Wherein, the filling layer 1 is the bottom layer, and the elastic cushion layer 4 is laid on the filling layer 1. Preferably, the filling layer is made of self-compacting concrete, so as to provide good fluidity when pouring, and can provide a good support effect. The end of the elastic cushion layer 4 is a sealing material (such as polyurethane caulking glue) 15 to ensure that dust, sundries, water, etc. do not enter the space between the elastic cushion layer 4 and the track 6 or between the elastic cushion layer 4 and the filling layer 1. gap.

The elastic cushion layer 4 is arranged on the filling layer 1 to provide the elastic cushioning of the filling layer 1 and avoid its rapid damage. Optionally, the elastic cushion layer 4 is made of elastic materials such as rubber or polyurethane, which can be Provides good vibration dampening.

The track plate 6 is arranged on the elastic pad 4 for vibration reduction, and two parallel rails 7 are arranged on the track plate 6 , and each rail 7 is fixed on the track plate 6 through a plurality of fasteners 5 respectively.

Optionally, the elastic pad 4 can be supported in three ways: surface support (see FIG. 2 ), point support (see FIG. 3 ) and strip support (see FIG. 4 ).

In the surface support shown in FIG. 2 , the lower surface of the track plate 6 is flat on the entire upper surface of the elastic cushion 4 , and the elastic cushion 4 covers the bottom and the sides of the track plate 6 as a whole.

In the point support shown in Fig. 3, the elastic cushion layer 4 comprises a plurality of rectangular parallelepiped, cylinder, circular truncated or truncated truncated elastic cushion layers 4, and the lower surface of the track plate 6 is laid on the plurality of on the elastic cushion.

In the strip support shown in FIG. 4 , the elastic pad 4 includes at least two parallel elastic support strips, and the lower surface of the track plate 6 is laid on the top surfaces of the two elastic support strips.

Optionally, the cross-section of the track plate 6 is a symmetrically arranged polygon, with slope structures on both sides to enhance the adaptability to the tunnel cross-section.

The upper surface of the track plate 6 is a horizontal plane or has a slope, and there may be a boss on its upper surface, and the surface of the boss is a horizontal plane or an inclined plane.

The upper surface of the track plate 6 is reserved with 4 hoisting points 11 for hoisting and laying, marks 14 for centering, and reserved holes 12 for fixing the adjustment plate. The holes for installing prisms can use nylon sleeves for installing fasteners. , Nylon sleeves can also be specially embedded in the board.

Wherein, the two sides of described track plate 6 can be provided with longitudinal connecting device 10, thereby connect track plate 6 between through longitudinal connecting device 10, better avoid the mutual shift between plates, wherein, described longitudinal connecting The device 10 may include a plurality of mounting holes on the track plate 6 and connecting bars fixed in the mounting holes by bolts, so that two prefabricated plates are longitudinally connected.

Wherein, two holes 2 are arranged in the middle of the track plate 6, and the holes 2 penetrate the track plate 6 and the elastic cushion layer 4, and after filling the filling layer through the holes 2, the limit piles of the plate are formed.

Wherein, a sealing sleeve 3 is installed in the hole 2, and the sealing sleeve is a cylindrical structure made of an elastic material, so as to ensure that when the filling layer is paid attention to from the hole, the filling material is prevented from entering between the plate and the elastic cushion, resulting in loss of Vibration fails. At the same time, a buffering effect is formed between the plate and the limit pile.

Wherein, the track plate 6 adopts factory production, and the elastic cushion layer and the track plate are compounded into one in the factory (the elastic cushion layer can also be laid on site under special circumstances), and after being transported to the site by a pallet truck, finely adjusted After the platform car is laid and finely adjusted, the adjustment rod 14 is used to fix the board, the filling layer is poured and the seamless line is laid.

Wherein, the both sides of described track plate 6 can be provided with drainage ditch 8, and the bottom of elastic cushion 4 can be provided with water ditch (at this moment drainage ditch 8 can not be established) or not be provided with water ditch.

Therefore, when the slab track damping structure of the present invention is used in the field of rail transit, not only the damping performance can be designed according to the needs, but also the construction process is simple, the construction speed is fast, the construction precision is high, the track smoothness is good, and the labor intensity is low. Low-level characteristics, in line with the current direction of rail transit environmental protection, high efficiency and disease reduction, huge social benefits, it can effectively reduce the vibration and secondary structure noise problems generated by the operation of urban rail transit vehicles.

Obviously, the above descriptions and records are only examples and not intended to limit the disclosure, application or use of the present invention. Although the embodiments have been described in the embodiments and described in the drawings, the invention is not limited to the particular examples illustrated in the drawings and described in the embodiments as the best mode presently considered for carrying out the teachings of the invention, The scope of the invention is to include any embodiment falling within the foregoing description and appended claims.

Claims (15)

1. A novel prefabricated slab damping track structure for rail transit, comprising a filling layer, an elastic cushion and a track slab successively, is characterized in that: The elastic cushion layer is laid on the filling layer, and the track plate is arranged on the elastic cushion layer for vibration reduction. The elastic cushion layer is made of elastic materials such as rubber or polyurethane; Two parallel steel rails are arranged on the track plate, and each steel rail is respectively fixed on the track plate by a plurality of fasteners. 2. The damping track structure as claimed in claim 1, characterized in that: the elastic cushion is a surface support or a point support or a strip support, and in the surface support, the lower surface of the track plate is tiled on the elastic cushion In the point support, the elastic cushion layer includes a plurality of rectangular parallelepiped, cylinder, circular truncated or truncated truncated elastic cushion layers arranged at intervals, and the lower surface of the track plate is laid on the multiple elastic cushion layers Above, in the strip support, the elastic cushion layer includes at least two parallel elastic support strips, and the lower surface of the track plate is laid on the top surface of the two elastic support strips. 3. The damping track structure as claimed in claim 1, characterized in that: the upper surface of the track plate is in the form of a horizontal plane or a herringbone slope surface, the section of the track plate is polygonal, and the two sides of the circular tunnel section are slope structures to enhance Adaptability to the tunnel section, the section of the track slab in the rectangular and horseshoe section section is a rectangular section or the same as the circular tunnel section with slope surfaces on both sides. 4. The vibration-damping track structure as claimed in claim 1, the steel bar spacing in the plate is arranged according to a certain modulus and shape, so as to realize the automatic production of the steel mesh in the plate. 5. The vibration-damping track structure as claimed in claim 1, characterized in that: the track slab has 1-3 holes through the thickness direction of the track slab for pouring of the filling layer under the slab and reserved positions for the fixed piles , Observation on the pouring of the filling layer under the slab. 6. The damping track structure as claimed in claim 1, characterized in that: the track plate is an installation condition reserved for temporarily positioning the support legs, and the support legs are installed by installing a sleeve device in the plate or on the side of the plate, using The thread on the support leg is fixed and adjusted by engaging with the thread in the sleeve. 7. The damping track structure as claimed in claim 1, characterized in that: the track plate has pre-embedded conditions for automatic measurement and positioning marks, which are realized by pre-embedding sleeves in the plate or directly using sleeves for installing fasteners. 8. The damping track structure as claimed in claim 1, characterized in that: there are centering marks on the track plate for the positioning of the decking. 9. The damping track structure as claimed in claim 1, characterized in that: there are 3-4 special lifting nails embedded in the track plate for lifting. 10. The damping track structure as claimed in claim 1, characterized in that: the end of the track plate is reserved for installing embedded parts for longitudinal connection. 11. The damping rail structure according to claim 1, characterized in that: there are pre-embedded components for pre-embedded installation of contact rails. 12. The vibration-damping track structure as claimed in claim 1, characterized in that: the steel bar spacing in the plate is arranged according to a certain modulus, which is convenient for the automatic production of the steel mesh. 13. The vibration-damping track structure as claimed in claim 1, characterized in that: the embedded part for the composite connection of the elastic cushion is embedded, and the connected embedded part is a bolt sleeve, an expansion bolt fixed end, a simple expansion Bolts or wooden pre-embedded piles, and the composite of prefabricated panels and elastic pads can also be realized through reserved grooves or pre-embedded channels. 14. The vibration-damping track structure according to claim 1, characterized in that: the connection between the vibration-damping pad and the track plate adopts a special connection method that does not affect the performance of the vibration-damping pad. 15. The damping track structure as claimed in claim 1, characterized in that: the composite damping cushion at the bottom of the track slab and the side cushion are designed separately or integrated with unequal rigidity.