CN213708995U - Straddle type single-track low-position line turnout area and non-turnout area transition section foundation structure - Google Patents

Abstract

The utility model provides a straddle type monorail low-lying line turnout area and non-turnout area transition section foundation structure, which comprises a bearing component for bearing a track beam and a plurality of rigid piles for supporting the bearing component, wherein the bearing component comprises a sandstone cushion layer, a roadbed packing layer and a track bearing plate for bearing the track beam, which are sequentially laid on the top ends of the rigid piles, and one end of the track bearing plate, which is close to the turnout area, is lapped on a bearing platform; the bottom end of the rigid pile penetrates through the weak stratum and then extends into the bearing layer, and the top end supports the bottom end of the gravel cushion layer. In the transition section foundation structure, the bearing assembly and the plurality of rigid piles form a rigid bearing structure to bear load such as compression, tension, bending and torsion transmitted by the track beam, so that the track beam is ensured not to generate excessive deformation, uniform transition of foundation settlement and rigidity is met, and long-term stability of the track beam is ensured; the gravel cushion layer is laid on the top end of the rigid pile, the roadbed packing layer is directly laid on the gravel cushion layer, and then the rail bearing plate is installed, so that the material is saved, the construction is simple and convenient, and the economic benefit is improved.

Description

Straddle type single-track low-position line turnout area and non-turnout area transition section foundation structure

Technical Field

The utility model relates to a straddle type monorail transit engineering technical field, in particular to straddle type single track hangs down puts circuit switch district and non-switch district transition section foundation structure.

Background

The straddle type monorail is mainly elevated, the track change of the train is realized by a turnout beam and a track beam of a low-lying line connected with the turnout beam, the turnout beam is integrally connected with the track beam in the same direction after rotating for a certain angle, but the rotation of the turnout beam easily causes uneven deformation of a transition section foundation due to different basic rigidity of the transition section between the turnout beam and the track beam, and the normal track change and riding comfort of the train can be influenced when the deformation is serious. The settlement and rigidity of the foundation of the turnout area, the non-turnout area and the transition section of the turnout area and the non-turnout area meet certain requirements, and therefore uniform transition is achieved. The measures taken in the prior art are mostly that the transition section foundation structure is arranged in a section with relatively high and uniform foundation rigidity so as to meet the stability requirement of the transition section structure, but the stability of the transition section structure can not be kept for a long time usually, and a large amount of maintenance and repair cost is also needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a straddle type single track is low puts circuit switch district and non-switch district changeover portion foundation structure to solve the technical problem that the changeover portion structure in switch district and non-switch district is unstable or stability is not permanent among the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a straddle type monorail low-lying line turnout area and non-turnout area transition section foundation structure, which comprises a bearing component for bearing a track beam and a plurality of rigid piles for supporting the bearing component, wherein the bearing component comprises a sandstone cushion layer, a roadbed packing layer and a track bearing plate, the sandstone cushion layer and the roadbed packing layer are sequentially laid on the top ends of the rigid piles, the track bearing plate is used for bearing the track beam, and one end, close to the turnout area, of the track bearing plate is lapped on a bearing platform of the turnout area; the bottom end of the rigid pile penetrates through the weak stratum and then extends into the bearing layer, and the top end supports the bottom end of the gravel cushion layer.

Furthermore, the gravel cushion layer is formed by laying one or more of medium sand, coarse sand, gravel sand and broken stones.

Furthermore, the thickness of the sandstone cushion layer is 30-70 cm.

Further, the grit bed course with the concrete cushion butt in switch district.

Further, the rigid piles include CFG piles and/or plain concrete piles.

Furthermore, the bearing component also comprises a supporting plate arranged on the bearing platform, and one end of the rail bearing plate close to the turnout area is lapped on the supporting plate and is connected with the supporting plate.

Furthermore, the supporting plate is connected with a boss of the turnout area through a steel bar.

Further, the bearing assembly further comprises a wear-resistant sliding layer, and the wear-resistant sliding layer is arranged between the supporting plate and the rail bearing plate.

Furthermore, the bearing assembly further comprises a stop block fixed at the top end of the support plate, the stop blocks are respectively arranged on two sides of the rail bearing plate, and the stop blocks are abutted to the rail bearing plate.

Furthermore, a plurality of first connecting bolts are embedded at the top of the rail bearing plate to be connected with the rail beam; a plurality of second connecting bolts are buried in the top of the supporting plate to connect the rail bearing plate.

The utility model provides a stride a formula single track and hang down circuit switch district and non-switch district changeover portion foundation structure, adopt bearing assembly and a plurality of rigidity stake bearing track roof beam that intensity and wholeness are good, and the pile foundation passes the weak stratum and stretches into reliable holding power layer, bearing assembly and a plurality of rigidity stake constitution rigidity load-carrying structure, in order to undertake the pressure of track roof beam transmission, draw, bend, load such as turn round, ensure that the track roof beam does not produce too big deformation because of foundation rigidity is not enough, satisfy the changeover portion basis subside and rigid even transition and guarantee its demand stable for a long time in order to satisfy train safe operation. Additionally, the utility model discloses lay the grit bed course on the top of rigid pile, and can directly lay the road bed packing layer on the grit bed course, install the bearing rail board again, save material, the construction is simple and convenient, and the time limit for a project is short, has improved economic benefits.

Drawings

Fig. 1 is a top view of a transition section infrastructure of a turnout area and a non-turnout area of a straddle-type monorail low-level line provided by an embodiment of the invention, wherein the turnout area infrastructure is shown;

FIG. 2 is a cross-sectional view A-A of FIG. 1 with the track beam and switch beam omitted;

fig. 3 is an enlarged view of fig. 2 at B.

Description of reference numerals:

1. a weak formation; 2. a support layer;

100. a transition section infrastructure; 110. a load bearing assembly; 111. a sandstone cushion layer; 112. a roadbed packing layer; 113. a rail bearing plate; 113a, a first connecting bolt; 113b, a second connecting bolt; 114. a support plate; 115. a wear resistant sliding layer; 116. a stopper; 120. a rigid pile;

200. a turnout zone foundation structure; 210. drilling a cast-in-place pile; 220. a bearing platform; 230. a boss; 240. a concrete cushion;

300. a track beam; 400. a turnout beam.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. In the description of the present invention, the related position or positional relationship is based on the position or positional relationship shown in fig. 2, wherein "top" and "bottom" refer to the top-bottom direction of fig. 1. It is to be understood that such directional terms are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operative in a particular orientation, and therefore should not be taken as limiting the invention

Referring to fig. 1 to 3, the present embodiment provides a straddle type monorail low-lying line turnout area and non-turnout area transition section foundation structure, including a bearing assembly 110 for bearing a track beam 300 and a plurality of rigid piles 120 for supporting the bearing assembly 110, the bearing assembly 110 includes a sand cushion layer 111, a roadbed packing layer 112 and a track supporting plate 113 for bearing the track beam 300, which are sequentially laid on the top ends of the rigid piles 120, and one end of the track supporting plate 113 close to the turnout area is lapped on a bearing platform 220 of the turnout area; the bottom end of the rigid pile 120 penetrates through the weak stratum 1 and then extends into the supporting layer 2, and the top end supports the bottom end of the gravel cushion layer 111.

It is understood that the transition section infrastructure of the embodiment of the present application is disposed corresponding to the switch area infrastructure 200, for example, the top plane of the rail bearing plate 113 and the top plane of the boss 230 of the switch area infrastructure 200 are in the same horizontal plane, refer to fig. 1 and 2, so that the track beam 300 carried on the rail bearing plate 113 and the switch beam 400 carried on the boss 230 are connected in the same direction. In addition, in the turnout zone foundation structure 200, a part of a common bearing platform 220 is buried in the ground, and the transition section foundation structure 100 is constructed according to the thickness of the buried bearing platform 220 in the ground, namely, a sand cushion layer 111 and a part of a roadbed packing layer 112 are also arranged in the ground so as to ensure the corresponding relation between the rail bearing plate 113 and the boss 230. The construction platform excavated around the bearing platform 220 is backfilled with concrete during construction of the bearing platform 220, so that the stability of the bearing platform 220 is improved, the stability of the roadbed structure under the bearing platform 220 and the concrete cushion 240 is protected, and the roadbed is prevented from being disturbed by the attached structures.

Specifically, the gravel pack 111 abuts against the concrete pad 240 in the turnout area. Gravel cushion 111 and 240 butts of concrete cushion can guarantee the wholeness of transition section foundation structure 100 and switch district foundation structure 200 to with roadbed packing layer 112, bear the combination of rail board 113, and the one end overlap joint that the one end that the bears the rail board 113 is close to the switch district is on cushion cap 220, make transition section foundation structure 100 and switch district foundation structure 200 form a whole, realize the rigidity of foundation basis and the even transition of subsiding, keep foundation structure's long-term stability. In addition, the rigid piles 120 include CFG piles and/or plain concrete piles, in particular. The embodiment of the application adopts the CFG pile and/or plain concrete pile and other rigid piles 120 composite foundations, so that the construction can be better controlled, and the economical efficiency of the structure can be guaranteed.

Referring to fig. 2, the roadbed packing layer 112 is laid between the sandstone cushion layer 111 and the rail bearing plate 113, and is uniformly filled layer by layer and compacted layer by layer during construction. It will be appreciated that the sand bedding 111 together with the cap 220 of the switch area infrastructure 200 carries the subgrade packing layer 112. One end of the roadbed filling layer 112 close to the turnout area is respectively abutted against the supporting plate 114 and the bearing platform 220 of the turnout area, and the roadbed filling layer 112 carries the rail bearing plate 113.

In the embodiment of the application, the turnout area and non-turnout area transition section foundation structure 100 of the low-positioned line is structurally reinforced by the rigid composite foundation and the sand cushion layer 111, and the roadbed packing layer 112 and the track bearing plate 113 are fixedly paved at the joint of the track beam 300, so that the rigidity of the foundation and the uniform transition of settlement can be realized, and the transition section structure is kept stable for a long time to meet the requirement of safe operation of a train. The bearing component 110 and the plurality of rigid piles 120 form a rigid bearing structure, one end of the rail bearing plate 113 of the bearing component 110 is lapped on the turnout zone foundation structure 200, load loads such as pressing, pulling, bending and twisting of the track beam 300 can be borne, and the track beam 300 is prevented from generating excessive deformation due to insufficient rigidity of a foundation. Meanwhile, the transition section foundation structure 100 of the embodiment of the application breaks through the conventional design that the foundation needs to be arranged at the position with relatively good rigidity and relatively uniform bearing capacity, and the applicable terrain conditions are wider.

In this application embodiment, gravel cushion 111 is laid on the top of rigid pile 120, and can directly lay roadbed packing layer 112 on gravel cushion 111, installs bearing rail plate 113 again, and save material, the construction is simple and convenient, and the time limit for a project is short, has improved economic benefits. In addition, the rigid composite foundation is adopted, and the bottom end of the rigid composite foundation penetrates through the weak stratum 1 and extends into the bearing layer 2, so that the deformation resistance of the foundation structure 100 at the transition section is improved, and the long-term stability of the foundation structure is better; the controllability and the economic nature of the construction of rigid composite foundation are better, have strengthened the practicality of this application embodiment changeover portion structure.

In some embodiments, the sand cushion 111 is constructed from one or more of medium sand, coarse sand, gravel, and crushed stone. Specifically, the mud content of the sand cushion 111 in the embodiment of the present application is not more than 5%. The gravel cushion 111 is horizontally paved and compacted in layers, and the width of the gravel cushion 111 is 0.5-1.0 m wider than the width of the roadbed slope foot. The sand cushion layer 111 is laid on the ground layer at the top end of the rigid pile 120, preferably constructed by using rubbles, and the sand cushion layer 111 increases the friction between the roadbed packing layer 112 and the ground layer, so that the two can keep long-term stability. Further, the thickness of the sand cushion 111 is 30cm to 70 cm. In the embodiment of the present application, the thickness of the sand-gravel cushion layer 111 is not less than 30cm, so as to satisfy the supporting function for the roadbed packing layer 112 and the track bearing plate 113 above the sand-gravel cushion layer, and in addition, the friction between the roadbed packing layer 112 and the ground layer is ensured, so that the two keep stable.

In some embodiments, the carriage assembly 110 further includes a support plate 114 disposed on the platform 220, and an end of the track plate 113 near the switch area is overlapped on the support plate 114 and connected to the support plate 114. In the embodiment of the present application, the supporting plate 114 is disposed on the platform 220 of the turnout zone foundation structure 200, and specifically, the steel bars embedded in the supporting plate 114 are bound with the steel bars embedded in the platform 220, so that the supporting plate 114 is fixed on the platform 220. It will be appreciated that securing one end of the rail plate 113 to the support plate 114 enables the transition section infrastructure 100 to interface with the switch area infrastructure 200 while maintaining the integrity of the two infrastructures and improving the stability of the rail plate 113. The boss 230 of the switch area infrastructure 200 is also secured to the platform 220 in a similar manner. Further, the support plate 114 is connected to the switch area bosses 230 by reinforcing steel. That is, the reinforcing bars of the support plate 114 and the boss 230 of the turnout area are bound before the construction of the support plate 114 and the boss 230 of the turnout area, so that the stability of the support plate 114 is further ensured.

It can be understood that the supporting plate 114 is connected with the boss 230 and fixedly disposed at the top end of the bearing platform 220 of the turnout zone foundation structure 200, and the rail bearing plate 113 is lapped on the top end of the supporting plate 114 and connected with the supporting plate 114, and can bear complex loads such as pressure, tension, bending and torsion transmitted by the track beam 300 and the turnout beam 400 under the bearing action of the rigid piles 120, the roadbed packing layer 112 and the gravel cushion layer 111, so as to ensure that the track beam 300 and the turnout beam 400 are not deformed too much due to insufficient rigidity of the foundation, and meet the requirements on the foundation strength and stability.

In some embodiments, a plurality of first coupling bolts 113a are embedded at the top of the rail bearing plate 113 to couple to the rail beam 300, and a plurality of second coupling bolts 113b are embedded at the top of the support plate 114 to couple to the rail bearing plate 113. It can be understood that the first coupling bolt 113a at the top of the rail bearing plate 113 can couple the rail bearing plate 113 with the rail beam 300 to ensure the stability of the rail beam 300. In addition, the rail plate 113 and the support plate 114 are rigidly connected by the second connecting bolt 113b, so that the lateral stability of the rail plate 113 can be better ensured.

Referring to fig. 3, in some embodiments, the bearing assembly 110 further comprises a wear resistant sliding layer 115, the wear resistant sliding layer 115 being disposed between the support plate 114 and the rail plate 113. And after the wear-resistant sliding layer 115 is paved and compacted, and after the detection is qualified, the rail bearing plate 113 above the wear-resistant sliding layer is constructed. Understandably, the wear-resistant sliding layer 115 is used for buffering the impact force of the train and releasing longitudinal temperature stress, so that the generation of settlement difference of the rail bearing plate 113 of a low-level line is avoided, and smooth transition between a turnout area and a non-turnout area is realized. Specifically, the wear resistant sliding layer 115 comprises one or more layers of polyester filament composite polyethylene geomembranes.

In some embodiments, the bearing assembly 110 further includes a stopper 116 fixed to the top end of the supporting plate 114, the stoppers 116 are respectively disposed on two sides of the rail plate 113, and the stoppers 116 abut against the rail plate 113. That is, the stoppers 116 are provided at the top end of the support plate 114 and are stopped at both lateral sides of the rail receiving plate 113, thereby restricting lateral displacement of the rail receiving plate 113 and preventing the rail receiving plate 113 from sliding laterally.

The utility model provides a stride a formula single track and hang low circuit switch district and non-switch district transition section foundation structure of putting that the embodiment provided can generally be under construction simultaneously with switch district foundation structure 200, and its work progress specifically as follows:

1. the construction method comprises the steps of firstly carrying out site leveling, then excavating a construction platform according to a certain slope rate, wherein the excavation depth is generally 2/3 of the thickness of a bearing platform 220 of a foundation structure 200 of the turnout area, the slope rate is generally 1: 1, necessary temporary protection is carried out on a side slope, and the construction safety is guaranteed.

2. And constructing the rigid pile 120 and the cast-in-situ bored pile 210 in the turnout area, so that the bottom ends of the rigid pile 120 and the cast-in-situ bored pile 210 respectively penetrate through the weak stratum 1 and extend into the bearing layer 2. The rigid piles 120 may be CFG piles and/or plain concrete piles. When the cast-in-situ bored pile 210 is constructed, a steel bar embedded part bound with a bearing platform 220 of a turnout area needs to be manufactured and installed.

3. And (5) tamping and leveling the field. The concrete pad 240 of the horizontally placed turnout zone is cast in place, and the thickness of the concrete pad is 0.1 m. Firstly, respectively building blocking guards of the gravel cushion layer 111 on two sides of the position needing to be filled with the gravel cushion layer 111; the sand bed 111 is then packed in layers and compacted. One end of the sand cushion 111 abuts against the concrete cushion 240, and the sand cushion 111 is laid to a thickness of 30 cm.

4. And after the solidification period of the concrete cushion 240 is up, binding the reinforcing steel bars of the bearing platform 220, the cast-in-situ bored pile 210, the boss 230 and the supporting plate 114, binding the reinforcing steel bars of the supporting plate 114 and the stop block 116 at the same time, and respectively pouring. The bosses 230 are coupled to the support plate 114 by reinforcing bars and are fixed together to the top surface of the platform 220. A stopper 116 is fixedly provided on the top end of the support plate 114 to prevent the rail plate 113 from moving sideways. Wherein, when the boss 230 is constructed, the distance between the boss 230 and the edge of the bearing platform 220 should not be less than 200 mm.

In the construction of this step, the nut embedded parts in the bosses 230 and the second connecting bolts 113b in the supporting plate 114 are embedded. Wherein the nut embedded parts of the boss 230 are used for rigidly connecting the turnout beam 400; the second coupling bolt 113b of the support plate 114 serves to rigidly couple the overlapping ends of the rail plate 113.

5. And filling a roadbed filling layer 112, and performing layered compaction filling. Then laying a wear-resistant sliding layer 115 between the supporting plate 114 and the rail bearing plate 113, compacting and detecting to be qualified, and constructing the rail bearing plate 113 of the low-position line above the roadbed packing layer 112.

In the construction of this step, the first connecting bolt 113a is embedded in the rail supporting plate 113 to rigidly connect the rail beam 300. In addition, a rail supporting plate 113 is horizontally disposed above the roadbed packing layer 112, and one end thereof is overlapped with the supporting plate 114 and rigidly fixed.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Moreover, the technical solutions of the present invention between the various embodiments can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are combined and contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and the present invention is not within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. The utility model provides a stride a formula single track and hang low circuit switch district and non-switch district transition section foundation structure which characterized in that: the track beam supporting device comprises a bearing assembly for bearing a track beam and a plurality of rigid piles for supporting the bearing assembly, wherein the bearing assembly comprises a sand stone cushion layer, a roadbed packing layer and a track bearing plate, the sand stone cushion layer, the roadbed packing layer and the track bearing plate are sequentially laid on the top ends of the rigid piles, the track bearing plate is used for bearing the track beam, and one end, close to a turnout area, of the track bearing plate is lapped on a bearing platform of the turnout area; the bottom end of the rigid pile penetrates through the weak stratum and then extends into the bearing layer, and the top end supports the bottom end of the gravel cushion layer.

2. The transition piece substructure of claim 1, wherein the sand bedding layer has a thickness of 30-70 cm.

3. The transition piece infrastructure of claim 1, wherein the gravel pack abuts a concrete pack of the switch area.

4. The transition segment foundation structure of claim 1, wherein the rigid piles comprise CFG piles and/or plain concrete piles.

5. The transition foundation structure of any one of claims 1 to 4, wherein the load bearing assembly further comprises a support plate disposed on the bearing platform, and one end of the rail bearing plate near the turnout zone is lapped on the support plate and connected with the support plate.

6. The transition piece infrastructure of claim 5, wherein the support plates are connected to the switch area bosses by rebar.

7. The transition piece infrastructure of claim 5, wherein the load bearing assembly further comprises a wear resistant sliding layer disposed between the support plate and the rail plate.

8. The transition foundation structure of claim 5, wherein the bearing assembly further comprises a stop fixed to a top end of the support plate, the stop being disposed on each side of the rail plate, the stop abutting against the rail plate.

9. The transition piece substructure of claim 5, wherein a plurality of first connecting bolts are embedded at the top of the rail plate to connect the rail beams; a plurality of second connecting bolts are buried in the top of the supporting plate to connect the rail bearing plate.

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