A pile-slab bridge support structure and a support method

Abstract

The present invention belongs to the technical field of bridge construction, and discloses a pile-slab bridge support structure and a support method. The pile-slab bridge support structure includes a steel profile bearing frame, a first-end support pile, a second-end support pile, a plurality of intermediate support piles and a plurality of support members. The steel profile bearing frame spans across a river, and a bridge span structure is to be built thereon; the first-end support pile is supported at one end of the steel profile bearing frame; the second-end support pile is supported at the other end of the steel profile bearing frame; the plurality of intermediate support piles are arranged horizontally, and the pile joints of the intermediate support piles are connected to the tops of the intermediate pile foundations; a first I-beam is horizontally embedded in the pile joint, and both ends of the first I-beam extend out of the side walls of the pile joint to form two cantilever beams; the plurality of support members extend horizontally, and the support members are supported between the steel profile bearing frame and the cantilever beams. The pile-slab bridge support structure and the support method provided by the present invention can be erected under the working condition that the designed elevation of the bridge is close to the water level, so as to ensure the smooth construction of the bridge.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge construction, and particularly relates to a pile - slab bridge support structure and a support method. Background Art

[0002] In bridge engineering, generally, a support structure is first formed, then a formwork is erected on the support structure, and then the bridge span structure of the bridge is constructed inside the formwork. The structure and construction process of the support structure are relatively complex.

[0003] In general support structures, there is a Bailey truss, which improves the erection speed of the support structure. However, for the situation where the designed elevation of the bridge is close to the water level, if the Bailey truss is erected, the Bailey truss will be submerged in water. Therefore, under such conditions, the existing support structure cannot be used for bridge construction.

[0004] Therefore, there is an urgent need for a pile - slab bridge support structure to solve the above - mentioned technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a pile - slab bridge support structure and a support method, which can be erected under the condition that the designed elevation of the bridge is close to the water level to ensure the smooth construction of the bridge.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A pile - slab bridge support structure, comprising:

[0008] A profiled steel bearing frame, spanning across the river, on which the bridge span structure is to be built;

[0009] A first - end support pile, located on one side of the river, supporting one end of the profiled steel bearing frame;

[0010] A second - end support pile, located on the other side of the river, supporting the other end of the profiled steel bearing frame;

[0011] A plurality of intermediate support piles, arranged horizontally, the intermediate support piles comprising:

[0012] An intermediate pile foundation, arranged in the middle of the river;

[0013] A connecting pile, connected to the top of the intermediate pile foundation;

[0014] A first I - beam, horizontally embedded in the connecting pile, and both ends of the first I - beam extend out of the side wall of the connecting pile to form two cantilever beams;

[0015] A plurality of support members, extending along the horizontal direction, and the support members support between the profiled steel bearing frame and the cantilever beams.

[0016] Preferably, the support member includes a second I-beam and a first temporary support. The first temporary support is disposed on the cantilever beam. The second I-beam extends along the transverse direction and is disposed between the first temporary support and the bearing frame.

[0017] Preferably, the concrete strength of the pile splicing is higher than that of the intermediate pile foundation.

[0018] Preferably, it further includes two flange support piles. The flange support piles are located in the middle of the river. The two flange support piles are respectively disposed at both ends of the queue formed by all the intermediate support piles. The flange support piles support on the profiled steel bearing frame.

[0019] Preferably, the flange support pile includes:

[0020] Two support columns, which are distributed at intervals along the longitudinal direction;

[0021] A connecting member, which is connected between the two support columns.

[0022] Preferably, the first-end support pile includes:

[0023] Multiple first-end pile foundations, which are disposed on one side of the river and arranged along the transverse direction;

[0024] A first foundation beam, which extends along the transverse direction. The first foundation beam is disposed on the side of the first-end pile foundation facing the river. The first foundation beam supports on the profiled steel bearing frame.

[0025] Preferably, the first-end support pile further includes a first reinforced concrete cushion layer. The first reinforced concrete cushion layer is disposed under the first foundation beam and extends along the transverse direction. Half of the circumference of the first-end pile foundation is embedded in the first reinforced concrete cushion layer. A steel mesh is disposed in the first reinforced concrete cushion layer.

[0026] Preferably, a foam board is disposed between the first reinforced concrete cushion layer and the first-end pile foundation.

[0027] Preferably, the profiled steel bearing frame includes multiple third I-beams and multiple fourth I-beams. Multiple third I-beams all extend along the longitudinal direction and are arranged at intervals along the transverse direction. Both ends of the third I-beams are respectively placed on the first-end support pile and the second-end support pile. Multiple fourth I-beams all extend along the transverse direction and are arranged at intervals along the longitudinal direction. The fourth I-beams are placed on the third I-beams.

[0028] A support method for a pile-slab bridge, constructing the above-mentioned support structure of the pile-slab bridge, includes:

[0029] Pouring the first-end support pile and the second-end support pile;

[0030] Casting of intermediate pile foundation;

[0031] Tie the pile connection steel bars on the upper part of the middle pile foundation and bury the first I-beam at the same time;

[0032] Install the steel template, and pass the first I-beam through the hole reserved on the steel template;

[0033] Concrete is poured into the steel formwork to form a connecting pile, and the first I-beam located outside is a cantilever beam;

[0034] Install supports on cantilever beams;

[0035] A steel bearing frame is erected on the first end supporting pile, the second end supporting pile and the supporting member.

[0036] Beneficial effects of the present invention:

[0037] The present invention provides a pile-slab bridge support structure, in which an intermediate support pile is constructed in the middle of the river, supported in the middle of a steel bearing frame, thereby ensuring the support strength of the steel bearing frame. At the same time, due to the support function of the intermediate support pile, the structure of the steel bearing frame is simpler than that of the Bailey frame, and can be erected under the condition that the bridge design elevation is close to the water level without being submerged in water, and at the same time, it also plays a role in reducing materials; the first I-beam is used as the main stress point, and the first I-beam is pre-embedded in the connecting pile, which has high stability, further ensuring the support strength of the steel bearing frame. Therefore, the pile-slab bridge support structure proposed by the present invention can be erected under the condition that the bridge design elevation is close to the water level, so as to ensure the smooth construction of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a longitudinal section view of a pile-plank bridge support structure provided by an embodiment of the present invention;

[0039] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0040] Figure 3 is a plan view of a pile-plank bridge support structure provided by an embodiment of the present invention;

[0041] Figure 4 is a schematic diagram of a flange support pile provided by an embodiment of the present invention;

[0042] Figure 5 is a schematic diagram of a first reinforced concrete cushion layer and a first end pile foundation provided by an embodiment of the present invention;

[0043] Figure 6 It is a plan view of a second I-beam provided in an embodiment of the present invention.

[0044] In the figure:

[0045] 10, Bridge span structure; 20, Road; 30, River;

[0046] 1, Steel section bearing frame; 2, First end support pile; 3, Second end support pile; 5, Support member; 6, Flange support pile;

[0047] 11, Third I-beam; 12, Fourth I-beam; 13, 14a I-beam; 14, Square timber; 21, First end pile foundation; 22, First foundation beam; 23, First reinforced concrete cushion; 24, Foam board; 25, Masonry retaining wall; 26, Concrete layer; 31, Second end pile foundation; 32, Second foundation beam; 33, Second reinforced concrete cushion; 41, Intermediate pile foundation; 42, Pile splicing; 43, First I-beam; 51, Second I-beam; 52, First temporary support; 53, Steel bar; 61, Support column; 62, Connecting piece; 63, Bracket; 64, Double 36a I-beam; 65, Fifth I-beam. Detailed implementation manner

[0048] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0049] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "installed" shall be understood in a broad sense. For example, it may be an installation connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0051] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0052] As Figures 1 to 6 shown, this embodiment provides a pile - slab bridge support structure, which includes a profiled steel bearing frame 1, a first - end support pile 2, a second - end support pile 3, a plurality of intermediate support piles and a plurality of support members 5. The profiled steel bearing frame 1 spans across a river 30, on which a bridge span structure 10 is to be built; the first - end support pile 2 is located on one side of the river 30 and supports one end of the profiled steel bearing frame 1; the second - end support pile 3 is located on the other side of the river 30 and supports the other end of the profiled steel bearing frame 1; the plurality of intermediate support piles are arranged horizontally, where the horizontal direction represents the flow direction of the river 30 and the vertical direction represents the direction across the river 30, that is, the extension direction of the road 20. The intermediate support piles include intermediate pile foundations 41, splicing piles 42 and first I - shaped steel 43. The intermediate pile foundations 41 are arranged in the middle of the river 30, and the splicing piles 42 are connected to the tops of the intermediate pile foundations 41; the first I - shaped steel 43 is horizontally embedded in the splicing pile 42, and both ends of the first I - shaped steel 43 extend out of the side walls of the splicing pile 42 to form two cantilever beams; the plurality of support members 5 extend horizontally, and the support members 5 support between the profiled steel bearing frame 1 and the cantilever beams.

[0053] For the pile - slab bridge support structure provided in this embodiment, intermediate support piles are constructed in the middle of the river 30 and support the middle part of the profiled steel bearing frame 1, ensuring the support strength for the profiled steel bearing frame 1. At the same time, due to the support of the intermediate support piles, the structure of the profiled steel bearing frame 1 is simpler than that of a Bailey truss, and it can be erected under the condition that the bridge design elevation is close to the water level without being submerged in water, and it also plays a role in reducing materials; using the first I - shaped steel 43 as the main stress point and embedding the first I - shaped steel 43 in the splicing pile 42 has high stability, further ensuring the support strength for the profiled steel bearing frame 1. Therefore, the pile - slab bridge support structure proposed in this embodiment can be erected under the condition that the bridge design elevation is close to the water level to ensure the smooth construction of the bridge.

[0054] Specifically, in this embodiment, the first I - shaped steel 43 is a 45a I - shaped steel.

[0055] To ensure the firm fixation of the first I - shaped steel 43, the concrete strength of the splicing pile 42 is higher than that of the intermediate pile foundation 41.

[0056] Specifically, the support member 5 includes a second I - shaped steel 51 and a first temporary support 52. The first temporary support 52 is arranged on the cantilever beam, the second I - shaped steel 51 extends horizontally, and the second I - shaped steel 51 is arranged between the first temporary support 52 and the bearing frame 1. In this embodiment, the second I - shaped steel 51 is a 50a I - shaped steel.

[0057] As Figure 2 and Figure 6As shown in the figure, in this embodiment, two second I-beams 51 are provided, and the second I-beams 51 are arranged longitudinally along the transverse direction on the first temporary support 52. The upper and lower parts between the two second I-beams 51 are welded and fixed by steel bars 53. The steel bars 53 adopt the connection method of column binding at the contact part with the pile splicing 42 to prevent the second I-beams 51 from becoming unstable.

[0058] Specifically, the steel section bearing frame 1 includes a plurality of third I-beams 11 and a plurality of fourth I-beams 12. The plurality of third I-beams 11 all extend longitudinally and are arranged at intervals in the transverse direction. The third I-beams 11 are simultaneously erected on the first end support pile 2, the support member 5, and the second end support pile 3. The plurality of fourth I-beams 12 all extend transversely and are arranged at intervals in the longitudinal direction. The fourth I-beams 12 are erected on the third I-beams 11. In this embodiment, both the third I-beams 11 and the fourth I-beams 12 adopt 36a I-beams. The middle part of the third I-beam 11 is erected on the second I-beam 51.

[0059] More specifically, a 14a I-beam 13 extending longitudinally is erected on the fourth I-beam 12, and a square wood 14 is laid on the 14a I-beam 13 to form the bottom of the mold of the bridge span structure 10.

[0060] As Figure 1 and Figure 5 shown, the first end support pile 2 includes a plurality of first end pile foundations 21 and a first foundation beam 22. The plurality of first end pile foundations 21 are arranged on one side of the river 30 and are arranged in the transverse direction; the first foundation beam 22 extends transversely, and the first foundation beam 22 is arranged on the side of the first end pile foundation 21 facing the river 30. The first foundation beam 22 is supported by the steel section bearing frame 1. Specifically, the first foundation beam 22 is a C30 reinforced concrete foundation beam, and steel bars are arranged above and below in the beam.

[0061] Specifically, the first end support pile 2 further includes a first reinforced concrete cushion 23. The first reinforced concrete cushion 23 is arranged below the first foundation beam 22 and extends transversely. Half of the circumference of the first end pile foundation 21 is embedded in the first reinforced concrete cushion 23, and a steel mesh is arranged in the first reinforced concrete cushion 23. The setting of the first reinforced concrete cushion 23 improves the support strength for the steel section bearing frame 1, and half of the circumference of the first end pile foundation 21 being embedded in the first reinforced concrete cushion 23 further improves the support strength.

[0062] Furthermore, a grouted rubble retaining wall 25 is arranged below the first reinforced concrete cushion 23, and a concrete layer 26 is arranged below the grouted rubble retaining wall 25.

[0063] As Figure 1 shown, a foam board 24 is arranged between the first reinforced concrete cushion 23 and the first end pile foundation 21 to prevent uneven settlement from squeezing the pile body of the first end pile foundation 21.

[0064] A foam board 24 is arranged between the first-end pile foundation 21 and the first foundation beam 22 to prevent uneven settlement from squeezing the pile body of the first-end pile foundation 21.

[0065] The structure of the second-end support pile 3 is similar to that of the first-end support pile 2, and also includes a second-end pile foundation 31, a second foundation beam 32, a second reinforced concrete cushion 33, etc. The third I-beam 11 of the steel section bearing frame 1 is erected on the first foundation beam 22, the second I-beam 51 and the second foundation beam 32. The remaining structures and specific position distributions of the second-end support pile 3 will not be elaborated here.

[0066] As Figure 3 shown, the pile-slab bridge support structure provided in this embodiment further includes two flange support piles 6. The flange support piles 6 are located in the middle of the river 30. The two flange support piles 6 are respectively arranged at both ends of the queue formed by all the middle support piles. The flange support piles 6 support the steel section bearing frame 1. The flange support piles 6 are used to support the edge of the steel section bearing frame 1 to build the flange of the bridge span structure 10.

[0067] Specifically, as Figure 4 shown, the flange support pile 6 includes two support columns 61 and a connecting member 62. The two support columns 61 are spaced apart longitudinally. The connecting member 62 is connected between the two support columns 61. In this embodiment, the support columns 61 are made of steel pipes, and the connecting member 62 is made of C14 channel steel. In this embodiment, two double-ply C14 channel steels are used to connect between the two support columns 61. Batten plates are added between the double-ply C14 channel steels. A bracket 63 and a steel pipe are welded under the C14 channel steel. The contact positions around the C14 channel steel, the steel pipe and the bracket 63 are fixed by electric welding to increase the overall stability.

[0068] More specifically, in this embodiment, a double-ply 36a I-beam 64 is provided on each of the two support columns 61 of the same flange support pile 6. A fifth I-beam 65 is provided on the two double-ply 36a I-beams 64. Both ends of the second I-beam 51 are erected on the two fifth I-beams 65. The fifth I-beam 65 is a 36a I-beam.

[0069] This embodiment also provides a method for supporting a pile-slab bridge, constructing the above-mentioned pile-slab bridge support structure, including:

[0070] S1. Pour the first-end support pile 2 and the second-end support pile 3;

[0071] Pour the first-end support pile 2 and the second-end support pile 3 according to the existing construction method, which will not be elaborated here.

[0072] S2. Grout the middle pile foundation 41;

[0073] S3. Tie the pile-connecting steel bars at the upper part of the middle pile foundation 41 and embed the first I-beam 43 at the same time;

[0074] In step S2, the height of the intermediate pile foundation 41 filled is higher than the designed height. After the filling is completed, the pile head with an appropriate height is broken so that the remaining height is the designed height. Then, the pile splicing steel bars are tied on its upper part, and the first I-beam 43 is buried.

[0075] S4. Install the steel formwork, and pass the first I-beam 43 through the reserved hole on the steel formwork.

[0076] The steel formwork is combined into upper, middle and lower three pieces, and the middle section of the steel formwork after processing is drilled according to the structural dimensions of the first I-beam 43.

[0077] S5. Pour concrete into the steel formwork to form the pile splicing 42, and the first I-beam 43 located outside is a cantilever beam.

[0078] S6. Install the support member 5 on the cantilever beam.

[0079] S7. Erect the profiled steel bearing frame 1 on the first-end support pile 2, the second-end support pile 3 and the support member 5.

[0080] When performing steps S2 - S7, drive the steel casing into the river 30, and the construction workers operate inside the steel casing, and pull out the steel casing in time after the operation is completed.

[0081] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A pile - slab bridge support structure, characterized in that, Comprising: A profiled steel bearing frame (1) spanning across a river (30) for constructing a bridge span structure (10) thereon; A first end support pile (2) located on one side of the river (30) and supporting one end of the profiled steel bearing frame (1); A second end support pile (3) located on the other side of the river (30) and supporting the other end of the profiled steel bearing frame (1); A plurality of intermediate support piles arranged horizontally, and the intermediate support piles include: An intermediate pile foundation (41) provided in the middle of the river (30); A connecting pile (42) connected to the top of the intermediate pile foundation (41); A first I-beam (43) horizontally embedded in the connecting pile (42), and both ends of the first I-beam (43) extend out of the side wall of the connecting pile (42) to form two cantilever beams; A plurality of support members (5) extending along the horizontal direction, and the support members (5) are supported between the profiled steel bearing frame (1) and the cantilever beam; Two flange support piles (6) located in the middle of the river (30), and the two flange support piles (6) are respectively arranged at both ends of the queue formed by all the intermediate support piles, and the flange support piles (6) support the profiled steel bearing frame (1); The support member (5) includes a second I-beam (51) and a first temporary support (52), the first temporary support (52) is arranged on the cantilever beam, and the second I-beam (51) extends along the horizontal direction and is arranged between the first temporary support (52) and the profiled steel bearing frame (1).

2. The pile-slab bridge support structure according to claim 1, wherein, The concrete strength of the connecting pile (42) is higher than that of the intermediate pile foundation (41).

3. The pile-slab bridge support structure according to claim 1, characterized in that, The flange support pile (6) includes: Two support columns (61) spaced apart longitudinally; A connecting member (62) connected between the two support columns (61).

4. The pile-slab bridge support structure according to claim 1, characterized in that The first end support pile (2) includes: A plurality of first end pile foundations (21) arranged on one side of the river (30) along the horizontal direction; A first foundation beam (22) extending along the horizontal direction, the first foundation beam (22) is arranged on the side of the first end pile foundation (21) facing the river (30), and the first foundation beam (22) supports the profiled steel bearing frame (1).

5. The pile-slab bridge support structure according to claim 4, wherein The first end support pile (2) further includes a first reinforced concrete cushion (23), the first reinforced concrete cushion (23) is arranged below the first foundation beam (22) and extends along the horizontal direction, half of the circumference of the first end pile foundation (21) is embedded in the first reinforced concrete cushion (23), and a steel mesh is arranged in the first reinforced concrete cushion (23).

6. The pile-slab bridge support structure according to claim 5, characterized in that, A foam board (24) is arranged between the first reinforced concrete cushion (23) and the first end pile foundation (21).

7. The pile-slab bridge support structure according to claim 1, characterized in that, The profiled steel bearing frame (1) includes a plurality of third I-beams (11) and a plurality of fourth I-beams (12). The plurality of third I-beams (11) all extend longitudinally and are arranged at intervals from each other along the transverse direction. Both ends of the third I-beam (11) are respectively placed on the first end support pile (2) and the second end support pile (3). The plurality of fourth I-beams (12) all extend along the transverse direction and are arranged at intervals from each other along the longitudinal direction. The fourth I-beam (12) is placed on the third I-beam (11).

8. A pile-slab bridge support method, characterized in that, Construct the pile-slab bridge support structure according to any one of claims 1-7, including: Pour the first end support pile (2) and the second end support pile (3); Grout the intermediate pile foundation (41); Bind the pile-connecting steel bars at the upper part of the intermediate pile foundation (41), and at the same time embed the first I-beam (43); Install the steel formwork, and pass the first I-beam (43) through the reserved hole on the steel formwork; Pour concrete into the steel formwork to form the pile connection (42), and the first I-beam (43) located outside is a cantilever beam; Install the support member (5) on the cantilever beam; Erect the profiled steel bearing frame (1) on the first end support pile (2), the second end support pile (3) and the support member (5).

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