CN204455724U - For the integral structure of Deep Thick Soft Ground Area roadbed track - Google Patents

Abstract

The utility model discloses a kind of integral structure for Deep Thick Soft Ground Area roadbed track, at least comprise the embedded gripper shoe of sleeper, the upper surface of the embedded gripper shoe of described sleeper is embedded with two parallel prefabricated sleeper blocks, and described prefabricated sleeper block is provided with track structure rail and fastener; Being provided with the anti-fan's stream reinforcing bar for connecting prefabricated sleeper block described in two in the embedded gripper shoe of described sleeper, in the embedded gripper shoe of described sleeper, being also provided with plate reinforcing bar; The bottom at the middle part of the embedded gripper shoe of described sleeper is arranged at intervals with span centre brace summer, and the Soft Soil Area below described span centre brace summer is provided with the span centre preformed pile for supporting described span centre brace summer; The bottom of the end of the embedded gripper shoe of described sleeper is provided with across end brace summer, the described Soft Soil Area across end brace summer bottom be provided with for support described across end brace summer across end preformed pile; Described span centre brace summer and be describedly respectively arranged with span centre beam reinforcing bar and across end carriage reinforcing bar across in end brace summer; Described span centre beam reinforcing bar and described plate reinforcing bar are crisscross arranged.It is less that the utility model has foundation settlement, the beneficial effect that tram operates steadily.

Description

Integrated structure for subgrade track in deep soft soil area

technical field

The utility model relates to the technical field of tram rail transit construction, in particular to an integrated structure for subgrade tracks in deep soft soil areas.

Background technique

As a medium-capacity rail transit, modern trams are well adapted to the backbone transportation of new urban areas, development zones, and secondary cities in large and medium-sized cities with the advantages of low carbon, environmental protection, low construction and maintenance costs, and comfortable rides. network needs. According to the current plan, the mileage of domestic modern trams will exceed 1,000 kilometers before 2020, and the development prospect is broad.

The existing tram generally adopts integral ballast bed, and adopts rigid pile slab structure subgrade to support it. The upper track bed slab and the lower support plate adopt two layers of reinforced concrete structure respectively, and then stack them together. The total height of the ballast bed is about up to is about 700mm, and the structural force is generally considered separately. However, in actual use, the interlayer action between the ballast bed slab and the support slab is between sliding and consolidation, so the theoretical calculation model must be conservative, resulting in a large total thickness of the structure under the rail. This huge structural system not only increases the weight applied to the foundation, which easily leads to uneven settlement of the foundation, but also increases the relocation of pipelines in the existing road sections with dense underground pipelines, which greatly increases the project cost. The construction period is prolonged and the normal operation of existing traffic is affected.

In addition, after the integral track bed structure is completed, it is not only difficult to maintain and repair, but also prone to uneven track surface due to uneven settlement of the foundation, which in turn affects passenger comfort and even causes tram derailment accidents.

Therefore, those skilled in the art are devoting themselves to developing a light weight, small volume, and controllable foundation settlement structure for subgrade tracks in deep soft soil areas.

Utility model content

In view of the above-mentioned defects of the prior art, the utility model proposes a mid-span support beam integrated with a sleeper embedded support plate, which is light in weight, small in size and controllable in foundation settlement for the integration of subgrade tracks in deep soft soil areas. structure.

In order to achieve the above purpose, the utility model provides an integrated structure for subgrade tracks in deep soft soil areas, which at least includes a sleeper embedded support plate, and the upper end surface of the sleeper embedded support plate is embedded with two parallel prefabricated A sleeper block, the prefabricated sleeper block is provided with rails and fasteners for track structure; the embedded support plate of the sleeper is provided with anti-drain reinforcement for connecting the two prefabricated sleeper blocks, and the embedded support plate of the sleeper is There is also a steel bar for the plate; the lower part of the middle part of the embedded support plate of the sleeper is provided with a mid-span support beam at intervals, and the soft soil area below the mid-span support beam is provided with a span for supporting the mid-span support beam. middle prefabricated pile; the lower part of the end of the embedded support plate of the sleeper is provided with a span-end support beam, and the soft soil area under the span-end support beam is provided with a span-end prefabricated pile for supporting the span-end support beam; The mid-span support beam and the end-span support beam are respectively provided with steel bars for the mid-span beam and steel bars for the end beam; the steel bars for the mid-span beam and the steel bars for the slab are arranged alternately.

Further, it also includes a pavement layer arranged on the upper part of the sleeper embedded support plate and a plain concrete cushion layer arranged at the lower end of the mid-span support beam.

Further, the mid-span prefabricated pile is a hollow pipe pile.

Further, the pavement layer adopts asphalt concrete, lawn greening or colored tiles.

Further, the longitudinal distance between the plurality of mid-span prefabricated piles is 5m.

The beneficial effects of the utility model:

The integrated structure of the utility model for subgrade tracks in deep soft soil areas overcomes the existing technology because the prefabricated sleeper block is embedded in the embedded support plate of the sleeper, and the embedded support plate of the sleeper and the mid-span support beam are integrally cast and formed. In order to offset the relative movement between the ballast bed slab and the embedded support plate of the sleeper, the under-rail structure must be enlarged, which saves raw materials, shortens the construction period, and reduces the construction cost.

In addition, by adopting the structure of the utility model, the calculation of the bearing capacity and settlement of the structure takes into account the effect of the soil between the piles, which can reduce the amount of reinforced concrete, and also reduce the range of uneven settlement of the foundation, and reduce the generation of trams due to uneven settlement of the foundation. The vertical and horizontal acceleration improves the comfort and safety of tram passengers.

At the same time, due to the change of the support structure of the under-rail structure, the total height of the embedded support plate and support beam of the sleeper is relatively low. The construction period is shortened, the construction difficulty is simplified, and the economic benefits are improved.

The conception, specific structure and technical effects of the present utility model will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, characteristics and effects of the present utility model.

Description of drawings

Fig. 1 is a schematic diagram of a transverse partial cross-sectional structure of the middle part of the embedded support plate of the sleeper in the first embodiment of the utility model.

Fig. 2 is a schematic view of the vertical structure of Embodiment 1 of the utility model.

Fig. 3 is a schematic structural diagram of the end nodes of the embedded support plate of the sleeper according to Embodiment 1 of the utility model.

Detailed ways

As shown in Figures 1 to 3, the utility model proposes an integrated structure for subgrade tracks in deep soft soil areas.

In the utility model, the sleeper embedded support plate 1 is divided into three parts to be named, namely the two ends of the sleeper embedded support plate and the middle part of the sleeper embedded support plate. Wherein the part located at the two ends of the sleeper embedded support plate 1 is named as the end of the sleeper embedded support plate, and the part other than the end of the sleeper embedded support plate is named as the middle part of the sleeper embedded support plate.

In the first embodiment, as shown in Figure 2, the integrated structure for subgrade tracks in deep soft soil areas includes a sleeper embedded support plate 1, and mid-span support beams 2 arranged at intervals below the middle of the sleeper embedded support plate 1 , and two mid-span prefabricated piles 3 arranged in parallel at the lower part of the mid-span support beam 2 for supporting the mid-span support beam 2.

It also includes a span-end support beam 2′ disposed below the end 11 of the sleeper embedded support plate 1 and two span-end prefabricated piles 3′ arranged in parallel at the bottom of the span-end support beam 2′. The end 11 of the embedded support plate of the sleeper in the adjacent section is connected by the span-end prefabricated pile 3' and the span-end support beam 2' arranged on the span-end prefabricated pile 3'. Wherein, the longitudinal spacing between the multiple mid-span prefabricated piles 3 is preferably 4-6m.

The upper end surface of the sleeper embedded support plate 1 is embedded with two parallel prefabricated sleeper blocks 4, and the prefabricated sleeper blocks 4 are provided with rails and fasteners for track structure. at the corresponding position. The sleeper embedded support plate 1 is provided with an anti-may flow reinforcement bar 13 for connecting two parallel prefabricated sleeper blocks 4 .

In order to enhance the strength of the mid-span support beam 2 and the span-end support beam 2′, steel bars for the mid-span beam and steel bars for the end-span beam are respectively provided therein.

The embedded support plate 1 of the sleeper is also provided with a plate steel bar 12 for improving the strength of the embedded support plate of the sleeper. In order to improve the bonding strength between the support beam and the embedded support plate of the sleeper, the steel bars for the mid-span beam and the steel bars for the plate set in the mid-span support beam are alternately arranged, bound and formed, and the mid-span support beam 2 is embedded with the sleeper The supporting plate 1 is integrally poured and formed.

In this embodiment, because the prefabricated sleeper block is embedded in the embedded support plate of the sleeper, and the embedded support plate of the sleeper and the mid-span support beam are integrally cast and formed, it overcomes the problem of offsetting the gap between the bed slab and the embedded support plate of the sleeper in the prior art. The problem that the under-rail structure must be enlarged due to the relative movement between them saves raw materials, shortens the construction period, and reduces the construction cost.

In order to ensure a better integration of the above-mentioned integrated structure with the municipal road, the upper end of the sleeper embedded support plate 1 is paved with asphalt concrete, lawn greening or colored tiles as the pavement layer 5 .

In other embodiments, the span-end prefabricated pile 3′ can also adopt a hollow pipe pile.

In other embodiments, the mid-span prefabricated pile 3 and the end-span prefabricated pile 3' also can have only one group, and it is arranged below the middle of the two steel rails.

The specific construction steps of the two adjacent sections of the integrated structure of the subgrade track in the deep soft soil area of the present invention are as follows:

Step 1, construct mid-span prefabricated pile 3 and span-end prefabricated pile 3′ in soft soil area 7.

Step 2, constructing the plain concrete cushion 6 at the lower part of the span-end support beam.

Step 3: Bundle the internal reinforcement of the span-end beam for the span-end support beam, and pour concrete to form the span-end support beam 2ˊ.

Step 4, staggered binding of the mid-span internal reinforcement of the mid-span support beam 2 and the internal reinforcement 12 of the embedded support plate 1 of the mid-span sleeper. The prefabricated sleeper rail blocks 4 are connected through the anti-masking steel bars 13, and placed on the bound steel bar structure.

In step five, the track is finely stripped, and then the mid-span support beam 2 and the sleeper embedded support plate 1 are integrally cast and formed. The end 11 of the poured sleeper embedded support plate is arranged on the span-end prefabricated pile.

Step 6, according to the same order, construct the second section, and set the ends 11 and 11′ of the embedded support plates of the sleepers of the adjacent two sections on the span-end prefabricated piles 3′ of the first section. There is a deformation seam between the end 11 of the sleeper embedded support plate of the first section and the end 11′ of the sleeper embedded support plate of the second section. The space between the end of the sleeper embedded support plate and the span-end prefabricated beam 2′ is filled with 5cm thick asphalt hemp silk. Follow the steps above to lay the sections in sequence.

Step seven, laying the pavement layer 5 on the laid sleeper embedded support plate to complete the subgrade track.

The integrated structure of the utility model for subgrade tracks in deep soft soil areas overcomes the existing technology because the prefabricated sleeper block is embedded in the embedded support plate of the sleeper, and the embedded support plate of the sleeper and the mid-span support beam are integrally cast and formed. In order to offset the relative movement between the ballast bed slab and the embedded support plate of the sleeper, the under-rail structure must be enlarged, which saves raw materials, shortens the construction period, and reduces the construction cost.

In addition, by adopting the structure of the utility model, the calculation of the bearing capacity and settlement of the structure takes into account the effect of the soil between the piles, which can reduce the amount of reinforced concrete, save raw materials, and also reduce the range of uneven settlement of the foundation, and reduce the impact of tramcars on the ground. The vertical and horizontal acceleration caused by uneven settlement improves the comfort and safety of tram passengers.

At the same time, due to the change of the support structure of the under-rail structure, the total height of the embedded support plate and support beam of the sleeper is relatively low. The construction period is shortened, the construction difficulty is simplified, and the economic benefits are improved.

The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the utility model without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection defined by the claims .

Claims (5)

1. An integrated structure for subgrade tracks in deep soft soil areas, characterized in that it includes at least a sleeper embedded support plate, and the upper end surface of the sleeper embedded support plate is embedded with two parallel prefabricated sleeper blocks, so The prefabricated sleeper block is provided with rails and fasteners for track structure; the embedded support plate of the sleeper is provided with anti-drain steel bars for connecting the two prefabricated sleeper blocks, and the embedded support plate of the sleeper is also provided with Reinforcement for the slab; mid-span support beams are arranged at intervals in the lower part of the middle part of the sleeper embedded support slab, and mid-span prefabricated piles for supporting the mid-span support beams are provided in the soft soil area below the mid-span support beams; The lower part of the end of the embedded support plate of the sleeper is provided with a span-end support beam, and the soft soil area under the span-end support beam is provided with a span-end prefabricated pile for supporting the span-end support beam; Reinforcing bars for mid-span beams and reinforcing bars for end-span beams are respectively arranged in the supporting beam and the supporting beam at the end of the span; the reinforcing bars for the mid-span beam and the reinforcing bars for the slab are arranged alternately. 2. The integrated structure for subgrade tracks in deep soft soil areas as claimed in claim 1, further comprising a pavement layer arranged on the upper part of the sleeper embedded support plate and a pavement layer arranged on the mid-span The plain concrete cushion at the lower end of the support beam. 3. The integrated structure for subgrade tracks in deep soft soil areas according to claim 2, wherein the mid-span prefabricated piles are hollow pipe piles. 4. The integrated structure for subgrade tracks in deep soft soil areas according to claim 2, characterized in that the pavement layer is made of asphalt concrete, lawn greening or colored bricks. 5. The integrated structure for subgrade tracks in deep soft soil areas according to any one of claims 1 to 4, characterized in that the longitudinal spacing between the plurality of mid-span prefabricated piles is 5m.