Prefabricated steel bar truss concrete combined bottom die

Abstract

The utility model relates to the technical field of building components, and discloses a prefabricated steel bar truss concrete combined bottom die which comprises a bottom plate, and a steel bar truss is arranged at the top end of the bottom plate. Wherein the bottom plate comprises a mold box at the bottom, the mold box is of a structure with an opening in the top end, a steel reinforcement framework is arranged in the mold box, and after the steel reinforcement framework is connected with the steel bar truss, concrete is poured into the mold box to the top end of the mold box; according to the utility model, bridge floor construction operation and cast-in-place operation can be carried out without erecting a bracket under a bridge, the requirement of not blocking traffic is met, the cost input of traffic guidance and modification is greatly reduced, the construction cost and time cost of erecting a bracket template are reduced, the social productivity is improved, and the practicability is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of building components, in particular to a prefabricated steel bar truss concrete combined bottom form. Background Art

[0002] With the increasing construction of steel box-concrete composite beam bridges in urban traffic, most of the concrete bridge deck parts are cast in the form of bottom bracket erection. A small number of bridges that do not have the conditions for erecting brackets under the bridge will make bracket installation components at the steel web position during the production of steel box beams. Later, the cantilever brackets will be installed with the help of the web to finally realize the pouring of bridge deck concrete. However, no matter which construction method is used, it is necessary to erect and install some brackets. Faced with the growing traffic flow in the city, the demand for construction technology that does not block road traffic is becoming more and more obvious. In response to this demand, there is also a method of erecting a load-bearing shoulder pole steel beam on the upper part of the bridge, using a pair of tie rods to erect a formwork platform from top to bottom, and using the top plate of the steel box beam as a support point to form a concrete composite beam bridge deck support formwork system. This method can avoid blocking traffic, but it still requires the installation and removal of formwork. Therefore, there is an urgent need for a prefabricated steel truss concrete composite bottom formwork that does not affect urban traffic flow and facilitates the cast-in-place construction of the bridge deck. Utility Model Content

[0003] The purpose of the utility model is to provide a prefabricated steel truss concrete combined bottom formwork, which can realize bridge deck construction and cast-in-place operations without setting up a scaffold under the bridge, meet the requirement of not blocking traffic, greatly reduce the cost investment of traffic diversion, and at the same time reduce the construction cost and time cost of setting up the scaffold formwork, improve social production capacity, and have strong practicality.

[0004] The utility model adopts the following technical solutions:

[0005] A prefabricated steel bar truss concrete combined bottom mold comprises a bottom plate, a steel bar truss is arranged on the top of the bottom plate; wherein the bottom plate comprises a bottom mold box, the mold box is a structure with an open top and a steel bar skeleton is arranged inside, and after the steel bar skeleton is connected to the steel bar truss, concrete is poured in the mold box to the top of the mold box.

[0006] Preferably, the steel truss comprises an upper chord steel bar and two lower chord steel bars, the upper chord steel bars and the lower chord steel bars are arranged in a triangular structure, wherein the upper chord steel bars and the lower chord steel bars are connected by web bars.

[0007] Preferably, the steel bar skeleton is welded by steel bars vertically arranged in a longitudinal and transverse direction.

[0008] Preferably, the steel bar skeleton is arranged in the middle of the mold box.

[0009] Preferably, support ribs are welded at the bottom of the node where the longitudinal and transverse steel bars at the bottom of the steel skeleton are connected, and the steel skeleton is located in the middle of the mold box through the support ribs.

[0010] Preferably, the bottom of the web reinforcement extends to below the lower chord reinforcement and is fixedly connected to the reinforcement skeleton.

[0011] Preferably, the mold box is made of steel plate.

[0012] Preferably, a reinforcing rib plate is provided on the outer side of the mold box.

[0013] Preferably, the reinforcing rib plate is a right-angled triangle structure, and the right-angled side of the reinforcing rib plate is fixedly connected to the outer side wall of the mold box.

[0014] Preferably, a support frame is provided on the outside of the mold box and covers the outside of the reinforcing rib plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model can be used as a bottom formwork for bridge deck construction and a construction platform at the same time by connecting the steel truss and the steel skeleton and pouring concrete in the mold box, so that the bridge deck construction and cast-in-place construction can be carried out without setting up a scaffold under the bridge, thus meeting the requirement of not blocking traffic; the installation can be completed by only using a crane to carry out the lifting operation, which greatly reduces the cost investment in traffic diversion, and at the same time reduces the construction cost and time cost of setting up the scaffolding formwork, thereby improving social production capacity and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the structure of the mold box of the embodiment of the present application;

[0018] Figure 3 This is a schematic diagram of the structure of the steel truss according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the present invention in conjunction with the accompanying drawings and embodiments:

[0020] like Figures 1 to 3 As shown, the utility model describes a prefabricated steel bar truss 2 concrete combined bottom mold, comprising a bottom plate 1, with a steel bar truss 2 arranged on the top of the bottom plate 1; wherein the bottom plate 1 comprises a bottom mold box 1-1, the mold box 1-1 is a structure with an open top and other sides being sealed, a steel bar skeleton 1-2 is arranged in the mold box 1-1, and after the steel bar skeleton 1-2 is connected to the steel bar truss 2, concrete is poured in the mold box 1-1 to the top of the mold box 1-1.

[0021] The utility model is fixedly connected with the steel frame 1-2 by the steel truss 2, and concrete is poured in the mold box 1-1, which can be used as a bottom mold for bridge deck construction and also as a construction operation platform, so that bridge deck construction and cast-in-place can be carried out without setting up a support under the bridge, thus meeting the requirement of not blocking traffic; only a crane is needed to cooperate in the lifting operation to complete the installation, which greatly reduces the cost investment in traffic diversion, and at the same time reduces the construction cost and time cost of setting up the support formwork, thereby improving social production capacity and having strong practicality.

[0022] Furthermore, the steel truss 2 includes an upper chord steel bar 2-1 and two lower chord steel bars 2-2, and the upper chord steel bars 2-1 and the lower chord steel bars 2-2 are arranged in a triangular structure, wherein the upper chord steel bars 2-1 and the lower chord steel bars 2-2 are connected by web bars 2-3, and the upper parts of the web bars 2-3 are welded on both sides of the upper chord steel bars 2-1, and the lower parts are welded to the lower chord steel bars 2-2 at the corresponding ends. In general, in this embodiment, the steel skeleton 1-2 is welded by steel bars arranged vertically in the longitudinal and transverse directions, and the steel skeleton 1-2 is arranged in the middle of the mold box 1-1 to ensure the structural strength of the prefabricated concrete bottom plate 1. Preferably, the bottom of the node where the longitudinal and transverse steel bars are connected at the bottom of the steel skeleton 1-2 is welded with support bars 3, and the steel skeleton 1-2 is located in the middle of the mold box 1-1 through the support bars 3.

[0023] In addition, in this embodiment, the bottom of the web reinforcement 2-3 extends to below the lower chord reinforcement 2-2 and is fixedly connected to the reinforcement skeleton 1-2, wherein the web reinforcement 2-3 is preferably connected to the reinforcement skeleton 1-2 by welding to ensure the structural strength of the entire combined bottom mold.

[0024] Furthermore, in this embodiment, the mold box 1-1 is made of steel plate, and a reinforcing rib plate 4 is arranged on the outside of the mold box 1-1 to ensure the strength of the mold box 1-1 and the construction quality. The reinforcing rib plate 4 is preferably arranged in a right-angled triangle structure, and the right-angled side of the reinforcing rib plate 4 is fixedly connected to the outer wall of the mold box 1-1. In addition, a supporting frame is arranged on the outside of the mold box 1-1, which is covered on the outside of the reinforcing rib plate 4, to ensure the flatness of the outside of the mold box 1-1, so as to facilitate the subsequent docking installation of the combined bottom mold.

[0025] During the construction of the utility model, firstly, according to the construction requirements, steel bars of a specified length are made, and the steel skeleton 1-2 and the steel truss 2 are welded respectively, then the steel skeleton 1-2 is placed in the prepared mold box 1-1, and the steel skeleton 1-2 and the steel truss 2 are welded and connected, and finally the concrete is poured, and the strength of the combined bottom mold is tested after the specified curing time, and the qualified combined bottom mold is transported to the designated storage area, and finally, when in use, the combined bottom surface is hoisted to the top of the steel box girder by a crane, and the joint seam is processed after the hoisting is completed, and the next step of the bridge deck steel bar binding work can be carried out after the processing is completed. The utility model can realize the bridge deck construction and cast-in-place without setting up a bracket under the bridge, meeting the requirement of not blocking traffic; only a crane is required to cooperate in the hoisting operation to complete the installation, which greatly reduces the cost investment of traffic diversion, and at the same time reduces the construction cost and time cost of setting up the bracket template, improves social production capacity, and has strong practicality.

Claims

1. A prefabricated steel bar truss concrete composite bottom form, characterized in that: It includes a base plate, and a steel truss is arranged on the top of the base plate; wherein the base plate includes a bottom mold box, and the mold box is a structure with an open top and a steel skeleton is arranged inside. After the steel skeleton is connected to the steel truss, concrete is poured in the mold box to the top of the mold box.

2. The prefabricated steel bar truss concrete composite bottom form according to claim 1 is characterized in that: The steel bar truss comprises an upper chord steel bar and two lower chord steel bars, wherein the upper chord steel bar and the lower chord steel bar are arranged in a triangular structure, wherein the upper chord steel bar and the lower chord steel bar are connected by a web bar.

3. The prefabricated steel bar truss concrete composite bottom form according to claim 2 is characterized in that: The steel bar frame is welded by steel bars vertically arranged in the longitudinal and transverse directions.

4. The prefabricated steel bar truss concrete composite bottom form according to claim 3 is characterized in that: The steel bar skeleton is arranged in the middle of the mold box.

5. The prefabricated steel bar truss concrete composite bottom form according to claim 4, characterized in that: Support ribs are welded at the bottom of the node where the longitudinal and transverse steel bars are connected at the bottom of the steel bar skeleton, and the steel bar skeleton is located in the middle of the mold box through the support ribs.

6. The prefabricated steel bar truss concrete composite bottom form according to claim 5, characterized in that: The bottom of the web reinforcement extends to below the lower chord reinforcement and is fixedly connected to the reinforcement skeleton.

7. The prefabricated steel bar truss concrete composite bottom form according to claim 1, characterized in that: The mold box is made of steel plates.

8. The prefabricated steel bar truss concrete composite bottom form according to claim 7, characterized in that: A reinforcing rib plate is arranged on the outer side of the mold box.

9. The prefabricated steel bar truss concrete composite bottom form according to claim 8, characterized in that: The reinforcing rib plate is a right-angled triangle structure, and the right-angled side of the reinforcing rib plate is fixedly connected to the outer side wall of the mold box.

10. The prefabricated steel bar truss concrete composite bottom form according to claim 9, characterized in that: A support frame is arranged on the outside of the mold box and covers the outside of the reinforcing rib plate.

Images