阅读说明：本技术 一种箱式路基与桥梁过渡结构及其对应的施工方法 (Box type roadbed and bridge transition structure and corresponding construction method thereof ) 是由 余雷 王祥 郭建湖 谢浩 李睿 王亚飞 李小和 詹志雄 于 2020-05-14 设计创作，主要内容包括：本申请公开了一种箱式路基与桥梁过渡结构及其对应的施工方法,包括：设置在地面上的箱式路基段；桥梁段,所述桥梁段包括承台、桥台以及沿纵向延伸的梁体,所述桥台设置在所述承台上以支撑所述梁体；以及过渡段,所述过渡段包括底板、顶板以及两道边墙,所述顶板设置在所述底板上方,两道所述边墙支撑在所述底板与所述顶板之间,以形成封闭的箱体结构；其中,所述过渡段间隙地设置在所述箱式路基段与所述桥梁段之间,所述底板的一端设置在所述承台上,所述底板的另一端支撑在地面上；所述顶板、梁体以及所述箱式路基段的顶面水平高度一致。本申请的一种箱式路基与桥梁过渡结构及其对应的施工方法,可有效解决箱式路基与桥梁结构的过渡衔接问题。(The application discloses box road bed and bridge transition structure and construction method who corresponds thereof includes: a box-type roadbed section arranged on the ground; the bridge comprises a bridge section and a supporting platform, wherein the bridge section comprises a bearing platform, a bridge abutment and a beam body extending along the longitudinal direction, and the bridge abutment is arranged on the bearing platform to support the beam body; the transition section comprises a bottom plate, a top plate and two side walls, the top plate is arranged above the bottom plate, and the two side walls are supported between the bottom plate and the top plate to form a closed box body structure; the transition section is arranged between the box type roadbed section and the bridge section in a clearance mode, one end of the bottom plate is arranged on the bearing platform, and the other end of the bottom plate is supported on the ground; the top plate, the beam body and the top surface of the box type roadbed section are consistent in horizontal height. The transition structure of the box type roadbed and the bridge and the corresponding construction method can effectively solve the problem of transition connection of the box type roadbed and the bridge structure.)

1. The utility model provides a box road bed and bridge transition structure which characterized in that includes:

a box-type roadbed section (1) arranged on the ground (9);

a bridge section (3), wherein the bridge section (3) comprises a bearing platform (31), a bridge platform (32) and a beam body (33) extending along the longitudinal direction, and the bridge platform (32) is arranged on the bearing platform (31) to support the beam body (33);

and a transition section (2), wherein the transition section (2) comprises a bottom plate (25), a top plate (26) and two side walls (24), the top plate (26) is arranged above the bottom plate (25), and the two side walls (24) are supported between the bottom plate (25) and the top plate (26);

the box type roadbed section (1), the transition section (2) and the bridge section (3) are sequentially arranged along the longitudinal direction, the box type roadbed section (1) is in clearance fit with the transition section (2), and the transition section (2) is in clearance fit with the bridge section (3); one end of the bottom plate (25) is arranged on the bearing platform (31), and the other end of the bottom plate (25) is supported on the ground (9); the top surfaces of the top plate (26), the beam body (33) and the box type roadbed section (1) are consistent in horizontal height.

2. The box-type roadbed and bridge transition structure of claim 1, wherein: the box type roadbed section (1) is a continuous hollow box body extending along the longitudinal direction.

3. The box-type roadbed and bridge transition structure of claim 1, wherein: the transition section (2) comprises a cement mortar layer (28), and the cement mortar layer (28) covers the surface of the part of the bottom plate (25) between the two side walls (24).

4. The box-type roadbed and bridge transition structure of claim 3, wherein: the transition section (2) is including burying drain pipe (27) in bottom plate (25) underground, be provided with on ground (9) along horizontal relative both sides of bottom plate (25) along longitudinal extension escape canal (91), drain pipe (27) first end runs through bottom plate (25) and cement mortar layer (28), the second end of drain pipe (27) extends to the top of escape canal (91).

5. The box-type roadbed and bridge transition structure of claim 4, wherein: the transition section (2) comprises a pipe support (271), and the pipe support (271) covers the part of the second end of the drain pipe (27) extending out of the bottom plate (25).

6. The box-type roadbed and bridge transition structure of claim 3, wherein: the cross section of the cement mortar layer (28) along the longitudinal direction, and the thickness of the middle area of the cement mortar layer (28) is larger than that of the two side areas.

7. The box-type roadbed and bridge transition structure of claim 1, wherein: the transition section (2) comprises an inspection door (241), the inspection door (241) being arranged on the side wall (24).

8. The box-type roadbed and bridge transition structure of claim 4, wherein: the box type roadbed and bridge transition structure comprises a water stop (4); the water stop (4) is arranged at the gap between the transition section (2) and the box type roadbed section (1); and/or the water stop (4) is arranged at the gap between the transition section (2) and the bridge section (3).

9. The box-type roadbed and bridge transition structure of claim 8, wherein: a sunken foundation pit (92) is formed in the ground (9) below the beam body (33), and the bearing platform (31) is arranged in the foundation pit (92).

10. A construction method of the box-type roadbed and bridge transition structure according to claim 9, which comprises:

constructing the box type roadbed section (1);

constructing the foundation pit (92);

reinforcing the ground (9), and pouring the bearing platform (31) in the foundation pit (92);

pouring the abutment (32) on the bearing platform (31), and constructing the beam body (33) on the abutment (32) so as to complete the pouring of the bridge section (3);

casting the transition section (2);

the water stop (4) is arranged between the transition section (2) and the box type roadbed section (1), and the water stop (4) is arranged between the transition section (2) and the bridge section (3);

constructing the drainage ditch (91) on the ground (9) at two opposite sides of the bottom plate (25) along the transverse direction;

and constructing the cement mortar layer (28) on the surface of the part of the bottom plate (25) between the two side walls (24).

11. A construction method as claimed in claim 10, wherein said step of casting said transition section (2) comprises:

pouring the bottom plate (25), and burying the drain pipe (27) in the bottom plate (25);

a casting tube support (271);

constructing two side walls (24) on the bottom plate (25), and arranging an inspection door (241) in each side wall (24);

and constructing the top plate (26) on the side wall (24).

Technical Field

The application relates to roadbed engineering, in particular to a box type roadbed and bridge transition structure and a corresponding construction method thereof.

Background

The conventional roadbed of the high-speed railway usually adopts a trapezoidal filling structure form, the required filler standard is higher in order to meet the requirements of settlement, stability and the like, and a large amount of fillers are required for a foundation bed. In recent years, high-speed railways in areas with a shortage of filler and a limited land use have begun to adopt new reinforced concrete box-type foundations as a substitute for the conventional foundations to effectively save investment and land.

But in the use process of the novel reinforced concrete box type roadbed, the following are found: the construction site is influenced by factors such as terrain, line elevation, geological conditions and the like, and the box type roadbed structure can not be adopted; when the road surface sinks suddenly, such as deep valley topography, the filling and leveling cost is too high, and a bridge structure is generally adopted to pass through the deep valleys, but the traditional roadbed and the box type roadbed can not be directly connected with the bridge structure.

Disclosure of Invention

In view of this, the embodiments of the present application are intended to provide a box-type roadbed and bridge transition structure and a corresponding construction method thereof, so as to solve the problem of transition connection between the box-type roadbed and the bridge structure.

In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

a box road bed and bridge transition structure, includes: a box-type roadbed section arranged on the ground; the bridge comprises a bridge section and a supporting platform, wherein the bridge section comprises a bearing platform, a bridge abutment and a beam body extending along the longitudinal direction, and the bridge abutment is arranged on the bearing platform to support the beam body; the transition section comprises a bottom plate, a top plate and two side walls, the top plate is arranged above the bottom plate, and the two side walls are supported between the bottom plate and the top plate; the box type roadbed section, the transition section and the bridge section are sequentially arranged along the longitudinal direction, the box type roadbed section is in clearance fit with the transition section, and the transition section is in clearance fit with the bridge section; one end of the bottom plate is arranged on the bearing platform, and the other end of the bottom plate is supported on the ground; the top plate, the beam body and the top surface of the box type roadbed section are consistent in horizontal height.

Further, the box-type roadbed section is a continuous hollow box body extending along the longitudinal direction.

Further, the transition section comprises a cement mortar layer which covers the surface of the part of the bottom plate between the two side walls.

Further, the changeover portion is including burying the drain pipe in the bottom plate underground, the subaerial escape canal along longitudinal extension that is provided with of horizontal relative both sides in the edge of bottom plate, the drain pipe first end runs through the bottom plate and cement mortar layer, the second end of drain pipe extends to the top of escape canal.

Further, the transition section includes a pipe support that overlies a portion of the second end of the drain pipe that extends beyond the floor.

Further, the cement mortar layer is in a cross section along the longitudinal direction, and the thickness of the middle area of the cement mortar layer is larger than the thickness of the two side areas.

Further, the transition section includes an inspection door disposed on the side wall.

Further, the box type roadbed and bridge transition structure comprises a water stop belt; the water stop is arranged at the gap between the transition section and the box type roadbed section; and/or the water stop band is arranged at the gap between the transition section and the bridge section.

Furthermore, a sunken foundation pit is formed on the ground below the beam body, and the bearing platform is arranged in the foundation pit.

A construction method comprising: constructing the box type roadbed section; constructing the foundation pit; reinforcing the ground, and pouring the bearing platform in the foundation pit; pouring the abutment on the bearing platform, and constructing the beam body on the abutment to finish pouring of the bridge section; pouring the transition section; the water stop is arranged between the transition section and the box type roadbed section, and the water stop is arranged between the transition section and the bridge section; constructing the drainage ditch on the ground on two opposite sides of the bottom plate in the transverse direction; and constructing the cement mortar layer on the surface of the part of the bottom plate between the two side walls.

Further, the step of casting the transition section comprises: pouring the bottom plate, and burying the drain pipe in the bottom plate; pouring a pipe support; constructing two side walls on the bottom plate, and arranging an inspection door in each side wall; and constructing the top plate on the side wall.

A box type roadbed and bridge transition structure and a corresponding construction method thereof are characterized in that a box type roadbed section, a bridge section and a transition section are arranged; the changeover portion includes bottom plate, roof and twice side wall, and the roof setting is in the bottom plate top, and twice side wall supports between bottom plate and roof to form confined box structure, thereby reduce the area, and then reduced ground treatment engineering volume, practiced thrift the investment. Box subgrade section, changeover portion and bridge section arrange along vertically in proper order, box subgrade section and changeover portion are clearance fit, changeover portion and bridge section are clearance fit, set up the changeover portion gap ground between box subgrade section and bridge section, make for the microgap between changeover portion and box subgrade section and the bridge section, can not transmit along fore-and-aft stress each other, compare in the form of traditional road bed and bridge transition of landfill building stones, the abutment no longer bears the earthwork pressure of one side, more be favorable to the abutment to stabilize. One end of the bottom plate is arranged on the bearing platform, and the other end of the bottom plate is supported on the ground; the rail dislocation caused by uneven settlement of the bottom plate and the bearing platform is avoided, the requirements of railway smoothness and safety are met, and the requirement of transition connection of the box type roadbed and the bridge structure is finally met.

Drawings

Fig. 1 is a schematic structural diagram of a box-type roadbed and bridge transition structure according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a transition section of an embodiment of the present application;

fig. 3 is a flowchart of a construction method according to an embodiment of the present application.

Detailed Description

It should be noted that, in the case of conflict, the technical features in the examples and examples of the present application may be combined with each other, and the detailed description in the specific embodiments should be interpreted as an explanation of the present application and should not be construed as an improper limitation of the present application.

In the description of the embodiments of the present application, the "up", "down", "left", "right", "front", "back" orientation or positional relationship is based on the orientation or positional relationship shown in fig. 1, it is to be understood that these orientation terms are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present application.

As shown in fig. 1 and 2, a box type roadbed and bridge transition structure comprises a box type roadbed section 1, a bridge section 3 and a transition section 2 which are arranged on the ground 9.

The bridge section 3 includes a bearing platform 31, a bridge platform 32 and a beam body 33 extending in the longitudinal direction, the bridge platform 32 is disposed on the bearing platform 31 to support the beam body 33; wherein, the whole bridge abutment 32 can be in a trapezoid shape with a narrow upper part and a wide lower part to improve the stability, and the upper part is provided with a step part 32a for placing the beam body 33; the bearing platform 31 is arranged on the ground 9 to complete the support of the weight of the bridge abutment 32 and the beam body 33.

The transition section 2 comprises a bottom plate 25, a top plate 26 and two side walls 24, the top plate 26 being arranged above the bottom plate 25, the two side walls 24 being supported between the bottom plate 25 and the top plate 26 to form a box structure. Specifically, the transition section 2 can be of a reinforced concrete structure, a cast-in-place mode is generally adopted, the transverse width of the top plate 26 is wider than that of the bottom plate 25, and the transverse width of the bottom plate 25 can be consistent with that of the beam body 33, so that the land area is reduced, the foundation treatment engineering quantity is reduced, and the investment is saved.

The box type roadbed section 1, the transition section 2 and the bridge section 3 are sequentially arranged along the longitudinal direction, the box type roadbed section 1 is in clearance fit with the transition section 2, and the transition section 2 is in clearance fit with the bridge section 3; the transition section 2 is arranged between the box type roadbed section 1 and the bridge section 3 in a clearance mode, so that small clearances are formed between the transition section 2 and the box type roadbed section 1 and between the bridge section 3, longitudinal stress cannot be transmitted mutually, and compared with the traditional roadbed and bridge transition mode of filling stones, the bridge abutment 32 does not bear the earthwork pressure on one side any more, and the stability of the bridge abutment 32 is facilitated. The horizontal heights of the top plate 26, the beam body 33 and the top surface of the box type roadbed section 1 are consistent, and the top plate 26 can be used for laying railway track plates (not shown) required by train operation, so that the transitional erection of railway tracks on the box type roadbed section 1 and the bridge section 3 is realized; one end of the bottom plate 25 is arranged on the bearing platform 31, and the other end of the bottom plate 25 is supported on the ground 9; the rail dislocation caused by uneven settlement of the bottom plate 25 and the bearing platform 31 is avoided, the requirements of railway smoothness and safety are met, and the requirement of transition connection of a box type roadbed and a bridge structure is finally met.

It can be understood that the transition section 2 is arranged between the box-type roadbed section 1 and the bridge section 3 with a gap, which means that the three sections are of a split structure, but the gap between the three sections is small enough relative to the longitudinal length to prevent the gap from influencing the supporting stress of the railway track slab.

One possible implementation, the box-type roadbed segment 1 can be a reinforced concrete structure, and specifically, the box-type roadbed segment 1 can be a continuous hollow box body formed by connecting two side walls, a bottom plate and a top plate and extending along the longitudinal direction.

In one possible embodiment, as shown in figures 1 and 2, the transition piece 2 comprises a layer of cement mortar 28, which layer of cement mortar 28 covers the surface of the floor 25 between the two side walls 24 to prevent seepages. The thickness of the cement mortar 28 is generally 10 mm-100 mm, the thickness of the middle area of the cement mortar layer 28 is larger than that of the two side areas along the longitudinal cross section of the cement mortar layer 28, specifically, the cement mortar layer 28 transversely forms a herringbone slope on the surface of the bottom plate 25, the slope rate is not less than 2%, and the accumulated water in the box body can be discharged through other structures after being collected towards the two sides in time.

In one possible embodiment, as shown in fig. 1 and 2, the transition section 2 includes a drain pipe 27 buried in the bottom plate 25, and the diameter of the drain pipe 27 may be set to 5cm to 30cm as needed. The floor 9 on two opposite sides of the bottom plate 25 along the transverse direction is provided with a drainage ditch 91 extending along the longitudinal direction, the drainage ditch 91 should keep a certain distance with the edge of the bottom plate 25, which is generally not less than 1.5m, the cross section of the drainage ditch 91 should be trapezoidal, and the ditch depth and the ditch bottom width are determined according to the local rainfall, which is generally 60cm multiplied by 60 cm. The first end of the drainage pipe 27 penetrates through the bottom plate 25 and the cement mortar layer 28, and the second end of the drainage pipe 27 extends to the upper side of the drainage ditch 91, so that accumulated water in the transition section 2 is drained to the drainage ditch 91 through the drainage pipe 27, and surface water is prevented from immersing in the transition section 2 or the bridge abutment 32 and affecting the foundation stability.

In one possible embodiment, as shown in fig. 1 and 2, the transition section 2 includes a pipe support 271, and the pipe support 271 covers a portion of the second end of the drain pipe 27 extending out of the bottom plate 25, so as to ensure that water in the drain pipe 27 smoothly flows into the drain 91. The pipe brace 271 may be made of cement concrete and may be formed by directly casting the portion of the drain pipe 27 extending out of the bottom plate 25 at the construction site.

In one possible embodiment, as shown in fig. 1 and 2, the transition section 2 includes an inspection door 241, and the inspection door 241 is disposed on the side wall 24 to facilitate service repair and maintenance.

In one possible embodiment, as shown in fig. 1 and 2, the box-type roadbed and bridge transition structure comprises a water stop 4; a water stop 4 can be arranged in a gap between the transition section 2 and the box type roadbed section 1; to prevent seeper leakage. In addition, a water stop 4 may be provided in the gap between the transition section 2 and the bridge section 3 to prevent seeper water from leaking. The water stop 4 can be formed by pouring water stop glue into the gap.

In one possible embodiment, as shown in fig. 1 and 2, a recessed pit 92 is formed in the ground 9 below the beam body 33, and the cap 31 is disposed in the pit 92 to facilitate foundation backfilling, compacting, and leveling processes.