Steel-concrete combined bearing platform and its construction method

Abstract

The present invention discloses a steel-concrete combined slab cap and a construction method thereof, wherein the steel-concrete combined slab cap comprises a slab cap, a reinforcement portion and at least two pile foundations, the reinforcement portion comprises a support member and at least two reinforcement members, the lower end of the reinforcement member is connected to the pile foundation, the upper end of the reinforcement member extends into the slab cap and is connected to the slab cap, the support member is located in the slab cap, and two adjacent reinforcement members are connected by the support member. The upper and lower ends of the reinforcement portion are respectively connected to the pile foundation and the slab cap, at which time the support member of the reinforcement portion can provide supporting force. Compared with the concrete slab cap in the prior art, the steel-concrete combined slab cap disclosed by the present invention has the support member participating in the force, which is conducive to improving the bearing capacity of the slab cap, reducing the thickness of the slab cap, reducing the depth of foundation pit excavation, speeding up the construction speed, and reducing the difficulty of construction. Reduce carbon emissions during the slab cap construction process. In bridge engineering, it has broad application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to a steel-concrete combined type cap and a construction method thereof. Background Art

[0002] The bridge structure is mainly divided into the superstructure, substructure and pile foundation. The superstructure is the part that bears the direct force, and the substructure is located between the superstructure and the foundation. It is responsible for transferring the load to the foundation and is an important structure that determines whether the bridge structure is at the target elevation and plane.

[0003] As a component of the bridge's substructure that transfers loads, the cap is a crucial component connecting the piers and pile foundations. It primarily bears the loads of the bridge's superstructure, the piers, and the crowds, vehicles, and other loads. Therefore, high requirements are placed on the thickness of the cap, which results in a greater excavation depth during construction. Currently, the most common construction method for caps is on-site casting. Thicker caps require larger concrete pours, resulting in higher carbon emissions. Furthermore, thicker caps and greater excavation depths slow construction progress and reduce efficiency.

[0004] How to change the current situation in the existing technology where the concrete pedestal is thick, the foundation pit excavation is deep, and the carbon emissions during construction are high is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the thicker pedestal leads to a larger amount of concrete pouring, resulting in higher carbon emissions, and at the same time the thicker pedestal and larger excavation depth slow down the construction progress and reduce construction efficiency, and provide a steel-concrete combined pedestal and its construction method.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present invention discloses a steel-concrete combined cap, characterized in that the steel-concrete combined cap comprises a cap, a reinforcement part and at least two pile foundations, the reinforcement part comprises a support member and a plurality of reinforcement members, the plurality of reinforcement members are arranged at intervals along the extension direction of the cap, the reinforcement members correspond to the pile foundations one by one, the lower end of the reinforcement member is connected to the pile foundation, the upper end of the reinforcement member extends into the cap and is connected to the cap, the reinforcement member is arranged in the middle of the pile foundation, the extension direction of the reinforcement member is parallel to the axial direction of the pile foundation, the support member is located in the cap, and adjacent two reinforcement members are arranged at intervals along the extension direction of the cap. The reinforcement is connected through the support member, and the support member includes a vertical rod, a diagonal brace and multiple chords. The two ends of the chord are respectively connected to two adjacent reinforcements, the two ends of the vertical rod are respectively connected to two adjacent chords, and the two ends of the diagonal brace are respectively connected to two adjacent chords. The extension direction of the diagonal brace is at an angle to the extension direction of the chord and / or the vertical rod. The distance between the two wing plates of the chord is greater than the maximum cross-sectional dimension of the vertical rod and the diagonal brace. The vertical rod and the diagonal brace are welded between the chord wing plates. The vertical rod and the chord are made of I-shaped steel, and the diagonal brace is made of angle steel.

[0008] In this solution, the aforementioned structural form is adopted, with the upper and lower ends of the reinforcement connected to the pile foundation and the slab, respectively. The support members of the reinforcement provide support force, which can be used to support the loads of the bridge superstructure, the piers, and other loads such as crowds and vehicles. This allows the support members to participate in the load-bearing process, thereby increasing the bearing capacity of the steel-concrete composite slab and reducing its thickness. This, in turn, reduces the excavation depth of the foundation pit, speeds up construction, reduces the difficulty of construction, and reduces carbon emissions during construction. The reinforcement members are positioned in the middle of the pile foundation, allowing them to better participate in the load-bearing process. Furthermore, the aforementioned structural form increases the connection area between the reinforcement members, the pile foundation, and the slab, improving the stability of the connection. Multiple reinforcement members are spaced apart along the extension direction of the slab, and the reinforcement members are connected to the pile foundations in a one-to-one correspondence, allowing them to better participate in the load-bearing process, further increasing the bearing capacity of the steel-concrete composite slab and reducing its thickness. A chord connects two adjacent reinforcement members. Furthermore, a vertical rod increases the structural strength between two adjacent chords, thereby increasing the bearing capacity of the support members. The structural strength of the two adjacent chords is further increased by the diagonal bracing, thereby further increasing the bearing capacity of the support member.

[0009] Preferably, a through hole is provided on the reinforcement member, a connecting member passes through the through hole at the bottom of the reinforcement member, and the connecting member is connected to the steel bars of the pile foundation to connect the reinforcement member to the pile foundation.

[0010] In this solution, a through hole is formed on the reinforcement member, and the connecting member passes through the through hole and is connected to the steel bar of the pile foundation. With the above structural form, the connection between the pile foundation and the reinforcement member is achieved through the connecting member.

[0011] Preferably, the steel-concrete combined slab further includes an ear plate and a fastener, one end of the ear plate is connected to the reinforcement, and the other end of the ear plate is connected to the support member through the fastener.

[0012] In this solution, fasteners are used to achieve a detachable connection between the ear plate and the support member. With this structure, if either the ear plate or the support member becomes damaged, only the damaged ear plate or support member needs to be replaced for normal use, reducing operating costs. Furthermore, the detachable connection achieved with fasteners offers a simple structure, reliable connection, and easy disassembly.

[0013] The present invention further discloses a construction method for a steel-concrete combined cap, characterized in that the steel-concrete combined cap further includes a connector, a lug, and a fastener. The construction method is used to manufacture the above steel-concrete combined cap, and the construction method includes:

[0014] Passing the connecting member through the reinforcing member;

[0015] connecting the connector to the steel bars of the pile foundation;

[0016] pouring concrete for the pile foundation;

[0017] Opening circular holes at both ends of the chord;

[0018] Connecting the vertical rod and the diagonal brace to two adjacent chord rods respectively;

[0019] welding the ear plate to the reinforcement;

[0020] The circular hole and the ear plate are connected by the fastener;

[0021] The cap steel bar passes through the reinforcement member;

[0022] A concrete cushion layer is laid below the cap, and the concrete of the cap is poured.

[0023] In this solution, the upper and lower ends of the reinforcement are connected to the pile foundation and the pedestal respectively. At this time, the support members of the reinforcement can provide supporting force, and this supporting force can be used to support the load of the bridge superstructure, the pier load, and the loads of people and vehicles, so that the support members participate in the force, improve the bearing capacity of the steel-concrete composite pedestal, reduce the thickness of the pedestal, and thus reduce the excavation depth of the foundation pit, speed up the construction speed, reduce the difficulty of construction, and reduce carbon emissions during the construction process.

[0024] The positive progress effect of the present invention is:

[0025] The upper and lower ends of the reinforcement are respectively connected to the pile foundation and the pedestal. At this time, the support parts of the reinforcement can provide supporting force, and this supporting force can be used to support the load of the bridge superstructure, the pier load, and the loads of people and vehicles, so that the support parts participate in the force, improve the bearing capacity of the steel-concrete composite pedestal, reduce the thickness of the pedestal, and thus reduce the excavation depth of the foundation pit, speed up the construction speed, reduce the difficulty of construction, and reduce carbon emissions during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of a steel-concrete combined pile cap according to an embodiment of the present invention;

[0027] Figure 2 A top view of a steel-concrete combined cap according to an embodiment of the present invention;

[0028] Figure 3 A side view of a steel hybrid cap according to an embodiment of the present invention;

[0029] Figure 4 The present invention is a flowchart of a construction method of a steel-concrete combined type cap.

[0030] Description of reference numerals:

[0031] Steel-concrete combined pedestal 1000

[0032] reinforcement portion 100

[0033] Reinforcement 10

[0034] Wing 11

[0035] Web 12

[0036] Through hole 13

[0037] Support member 20

[0038] Chord 21

[0039] Diagonal brace 22

[0040] Vertical bar 23

[0041] Ear plate 30

[0042] Fastener 40

[0043] Connector 50

[0044] Platform 200

[0045] Cap steel bar 210

[0046] Cap anti-crack steel mesh 220

[0047] Pile foundation 300

[0048] Concrete pad 400 DETAILED DESCRIPTION

[0049] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0050] like Figures 1 to 3 As shown, this embodiment provides a steel-concrete combined foundation cap 1000, wherein the steel-concrete combined foundation cap 1000 includes a foundation cap 200, a reinforcement portion 100 and at least two pile foundations 300, the reinforcement portion 100 includes a support member 20 and at least two reinforcement members 10, the lower end of the reinforcement member 10 is connected to the pile foundation 300, the upper end of the reinforcement member 10 extends into the foundation cap 200 and is connected to the foundation cap 200, the support member 20 is located in the foundation cap 200, and two adjacent reinforcement members 10 are connected by the support member 20. With the above-mentioned structural form, the upper and lower ends of the reinforcement part 100 are connected to the pile foundation 300 and the pedestal 200 respectively. At this time, the support member 20 in the reinforcement part 100 can provide a supporting force, and this supporting force can be used to support the load of the bridge superstructure, the load of the piers, and the loads of people and vehicles. As a result, the support member 20 participates in the force, improving the bearing capacity of the steel-concrete composite pedestal 1000 and reducing the thickness of the pedestal 200. In turn, the excavation depth of the foundation pit can be reduced, speeding up the construction speed, reducing the difficulty of construction, and reducing carbon emissions during the construction process. Specifically, the reinforcement 10 includes two flanges 11 and a web 12, and the ends of the web 12 are respectively welded to the two flanges 11.

[0051] In this embodiment, the reinforcement member 10 is a steel section. In other embodiments, the specific structure of the reinforcement member 10 may not be limited.

[0052] The reinforcement member 10 is positioned in the middle of the pile foundation 300, extending parallel to the axis of the pile foundation 300. Specifically, the placement of the reinforcement member 10 in the middle of the pile foundation 300 allows it to better participate in the load-bearing process. Furthermore, this structural arrangement increases the connection area between the reinforcement member 10, the pile foundation 300, and the cap 200, improving the stability of the connection.

[0053] During actual use, the lower end of the reinforcement 10 is connected to the pile foundation 300 . In order to increase the connection area between the reinforcement 10 and the pile foundation 300 , it is preferred that the side surface of the reinforcement 10 be close to the surface of the pile foundation 300 .

[0054] Multiple reinforcement members 10 are spaced apart along the extension direction of the cap 200, and are connected one-to-one with the pile foundations 300. This structure allows the reinforcement members 10 to better participate in the load-bearing process, thereby further improving the bearing capacity of the steel-concrete composite cap 1000 and further reducing the thickness of the cap 200.

[0055] The reinforced concrete composite cap 1000 also includes a connector 50. The reinforcement member 10 has a through-hole 13, through which the connector 50 passes, and is connected to the reinforcement of the pile foundation 300. During use, the reinforcement member 10 has a through-hole 13, through which the connector 50 passes, and is connected to the reinforcement of the pile foundation 300. This structural form connects the pile foundation 300 and the reinforcement member 10 via the connector 50.

[0056] In this embodiment, a plurality of through holes 13 are formed in the web 12, and the plurality of through holes 13 are spaced apart on the web 12. The through holes 13 can be denser depending on the number of connectors 50, and the specific number of through holes 13 is not limited herein. Furthermore, in this embodiment, the connectors 50 are perforated steel bars; in other embodiments, the form of the connectors 50 is not limited.

[0057] The support member 20 includes vertical rods 23 and multiple chords 21. The ends of the chords 21 are connected to two adjacent reinforcement members 10, and the ends of the vertical rods 23 are connected to two adjacent chords 21. With this structure, the chords 21 connect two adjacent reinforcement members 10. Furthermore, the vertical rods 23 increase the structural strength between two adjacent chords 21, thereby further enhancing the load-bearing capacity of the support member 20.

[0058] In actual use, two adjacent reinforcement members 10 are connected by multiple chord members 21, thereby improving the stability and reliability of the connection between the reinforcement members 10. In this embodiment, the chord members 21 extend perpendicularly to the direction of extension of the vertical members 23. That is, the chord members 21 extend horizontally, while the vertical members 23 extend vertically.

[0059] The support member 20 also includes a diagonal brace 22, and the two ends of the diagonal brace 22 are respectively connected to the two adjacent chords 21. In this embodiment, the diagonal brace 22 can have the following implementation methods. In the first implementation method, the extension direction of the diagonal brace 22 is at an angle to the extension direction of the chord 21; in the second implementation method, the extension direction of the diagonal brace 22 is at an angle to the extension direction of the vertical rod 23; in the third implementation method, the extension direction of the diagonal brace 22 is at an angle to the extension direction of the chord 21, and the extension direction of the diagonal brace 22 is at an angle to the extension direction of the vertical rod 23. Preferably, the extension direction of the diagonal brace 22 is at an angle to the extension direction of the vertical rod 23, and the extension direction of the diagonal brace 22 is at an angle to the extension direction of the vertical rod 23. With the above-mentioned structural form, the structural strength of the two adjacent chords 21 is further increased by the diagonal brace 22, thereby further increasing the bearing capacity of the support member 20.

[0060] In this embodiment, the diagonal brace 22 is arranged at an angle. In other embodiments, the diagonal brace 22 can also extend in the same direction as the vertical rod 23. Of course, it can also extend in other directions, which is not limited here. In order to increase the stability and reliability of the connection between the vertical rod 23, the chord rod 21, and the diagonal brace 22, it is preferred that the vertical rod 23 and the diagonal brace 22 are connected to the chord rod 21 by welding, and the vertical rod 23 and the chord rod 21 are made of I-shaped steel, and the diagonal brace 22 is made of angle steel. In other embodiments, the connection form and material of the vertical rod 23, the diagonal rod, and the diagonal brace 22 are not limited. That is, the vertical rod 23, the diagonal rod, and the diagonal brace 22 can adopt other types of steel rods or steel pipe rods according to actual needs.

[0061] The steel-concrete combined pedestal 1000 also includes an ear plate 30 and a fastener 40. One end of the ear plate 30 is connected to the reinforcement 10, and the other end of the ear plate 30 is connected to the support member 20 via the fastener 40. During actual use, the fastener 40 realizes a detachable connection between the ear plate 30 and the support member 20. With the above-mentioned structural form, if one of the ear plate 30 and the support member 20 is damaged, only the damaged ear plate 30 and the support member 20 need to be replaced for normal use, thereby reducing the cost of use. In addition, the detachable connection achieved by the fastener 40 has the characteristics of simple structure, reliable connection, and easy disassembly. Specifically, the ear plate 30 is fixed to the surface of the wing plate 11 by welding, and circular holes are provided at both ends of the chord rod 21. After the fastener 40 passes through the ear plate 30, one end of the fastener 40 extends into the chord rod 21 through the circular hole and is connected to the chord rod 21.

[0062] In this embodiment, the fastener 40 is a bolt. In other embodiments, the fastener 40 may also be in other forms, and the specific form of the fastener 40 is not limited here.

[0063] like Figure 4As shown, this embodiment further provides a construction method of a steel-concrete combined cap 1000, and the construction method of the steel-concrete combined cap 1000 is used to manufacture the above-mentioned steel-concrete combined cap 1000. The steel-concrete combined cap includes connectors, lugs, and fasteners. The construction method includes:

[0064] Step S1, passing the connecting member 50 through the reinforcing member 10;

[0065] Step S2: connecting the connector 50 to the steel bars of the pile foundation 300;

[0066] Step S3, pouring concrete for the pile foundation 300;

[0067] Step S4: opening circular holes at both ends of the chord rod 21;

[0068] Step S5: Connect the vertical rod 23 and the diagonal brace 22 to two adjacent chord rods 21 respectively;

[0069] Step S6: welding the ear plate 30 to the reinforcement member 10;

[0070] Step S7: The circular hole and the ear plate 30 are connected by fasteners 40;

[0071] Step S8: The cap steel bar 210 penetrates the reinforcement member 10;

[0072] Step S9: Lay a concrete cushion layer under the pedestal 200 and pour concrete for the pedestal 200.

[0073] In this embodiment, the upper and lower ends of the reinforcement part 100 in the steel-concrete combined pedestal 1000 obtained by the construction method are respectively connected to the pile foundation 300 and the pedestal 200. At this time, the support member 20 of the reinforcement part 100 can provide supporting force, and the supporting force can be used to support the upper structure load of the bridge, the pier load, and the loads of people and vehicles, so that the support member 20 participates in the force, improves the bearing capacity of the steel-concrete combined pedestal 1000, reduces the thickness of the pedestal 200, and thus can reduce the excavation depth of the foundation pit, speed up the construction speed, reduce the difficulty of construction, and reduce the carbon emissions during the construction process.

[0074] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A steel-concrete combined cap, characterized in that: The steel-concrete combined cap includes a cap, a reinforcement part and at least two pile foundations, the reinforcement part includes a support member and a plurality of reinforcement members, the plurality of reinforcement members are arranged at intervals along the extension direction of the cap, the reinforcement members correspond to the pile foundations one by one, the lower end of the reinforcement member is connected to the pile foundation, the upper end of the reinforcement member extends into the cap and is connected to the cap, the reinforcement member is arranged in the middle of the pile foundation, the extension direction of the reinforcement member is parallel to the axial direction of the pile foundation, the support member is located in the cap, and two adjacent reinforcement members are connected by the support member The support member includes a vertical rod, a diagonal brace and a plurality of chord rods, the two ends of the chord rod are respectively connected to two adjacent reinforcement members, the two ends of the vertical rod are respectively connected to two adjacent chord rods, the two ends of the diagonal brace are respectively connected to two adjacent chord rods, the extension direction of the diagonal brace is at an angle to the extension direction of the chord rod and / or the vertical rod, the distance between the two wing plates of the chord rod is greater than the maximum cross-sectional dimension of the vertical rod and the diagonal brace, the vertical rod and the diagonal brace are welded between the chord rod wing plates, the vertical rod and the chord rod are made of I-shaped steel, and the diagonal brace is made of angle steel.

2. The steel-concrete combined bearing cap according to claim 1, characterized in that: A through hole is provided on the reinforcement member, a connecting member passes through the through hole at the bottom of the reinforcement member, and the connecting member is connected to the steel bars of the pile foundation to connect the reinforcement member to the pile foundation.

3. The steel-concrete combined bearing cap according to claim 1, characterized in that: The steel-concrete combined cap further includes an ear plate and a fastener, one end of the ear plate is connected to the reinforcement, and the other end of the ear plate is connected to the support member through the fastener.

4. A construction method for a steel-concrete combined cap, characterized in that: The steel-concrete combined cap includes connectors, lugs, and fasteners. The construction method is used to manufacture the steel-concrete combined cap according to any one of claims 1 to 3, and the construction method includes: Passing the connecting member through the reinforcing member; connecting the connector to the steel bars of the pile foundation; pouring concrete for the pile foundation; circular holes are provided at both ends of the chord; Connecting the vertical rod and the diagonal brace to two adjacent chord rods respectively; welding the ear plate to the reinforcement; The circular hole and the ear plate are connected by the fastener; The cap steel bar passes through the reinforcement member; A concrete cushion layer is laid below the cap, and the concrete of the cap is poured.

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