Fabricated UHPC bridge pier column construction technology and prefabricated mold used for same

Abstract

The invention discloses a fabricated UHPC (Ultra High Performance Concrete) bridge pier column construction process and a prefabricated mold for the fabricated UHPC bridge pier column construction process. The fabricated UHPC bridge pier column construction process comprises the following steps: prefabricating a UHPC pier column mold; s2, transporting the UHPC pier column mold to a construction site, and hoisting and fixing the UHPC pier column mold on a plurality of abutments on the construction site; s3, concrete is poured into the UHPC pier column mold, and a pier column is formed after solidification; and S4, a prefabricated UHPC pier cap mold is erected on each pier column, concrete is poured into each UHPC pier cap mold to form a bridge component, and every two adjacent bridge components are connected to form the whole bridge. The construction efficiency of bridge construction can be improved, and the construction cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a construction process for an assembled UHPC bridge pier and a prefabricated mold used for the process. Background Art

[0002] The existing spliced ​​bridge construction requires the installation of piers / bridge components between several bridge components for support to ensure the normal operation of the bridge. The construction of piers / bridge components requires the construction of steel molds on site, or the casting of piers / bridge components at another place, and then the transportation of piers / bridge components to the construction site by trailers and the installation on site by hoisting equipment.

[0003] On the one hand, when the bridge piers / bridge components are first cast in another place and then transported to the construction site for use, during the transportation process, due to the weight, volume and fragility of the bridge piers / bridge components, it is necessary to select a transport vehicle with sufficient carrying capacity and carrying space to transport the bridge piers / bridge components. In addition, in my country's traffic management regulations, road facilities such as bridge holes and tunnels have strict restrictions on the height of vehicles, and some roads, highways and bridges also have clear restrictions on the width and weight of vehicles.

[0004] On the other hand, when building a steel formwork on site to realize the casting of bridge piers / bridge components, it is necessary to first build a simple bracket support, and then build a steel formwork on the bracket for casting and forming. After casting and forming, the steel formwork needs to be removed. For the construction of bridge piers / bridge components, the steel formwork not only affects the construction efficiency, but also increases the construction cost.

[0005] Based on the limitations and defects described above, whether it is the transportation conditions, transportation safety and road regulations of prefabricated piers / bridge components that lead to transportation difficulties, low transportation efficiency and high transportation costs, or the more operating procedures and higher costs brought about by on-site casting with steel molds, all of which will affect the construction efficiency and construction cost of the bridge. Therefore, it is urgent to research and develop a prefabricated UHPC bridge pier construction process to solve the defects in the existing technology. Summary of the invention

[0006] The present invention aims to provide a prefabricated UHPC bridge pier construction process and a prefabricated mold used for the process, which can improve the construction efficiency of bridge construction and reduce construction costs.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a prefabricated UHPC bridge pier construction process, and the specific implementation scheme is as follows:

[0008] A construction process for assembled UHPC bridge piers, comprising the following steps:

[0009] S1: Prefabricated UHPC pier mould;

[0010] S2: Transport the UHPC pier column mold to the construction site and hoist it to several piers on the construction site;

[0011] S3: pouring concrete into the UHPC pier column mold and solidifying to form a pier column;

[0012] S4: A prefabricated UHPC pier cap mold is set up on each pier column, and concrete is poured in each UHPC pier cap mold to form a bridge component. Two adjacent bridge components are connected to each other to form an integral bridge.

[0013] In some embodiments, the step S1 comprises the following steps:

[0014] A1: Prefabricate the hollow UHPC pier formwork according to the pier construction requirements;

[0015] A2: Lay and tie the steel bars to form the pier steel skeleton according to the pier construction requirements;

[0016] A3: The pier column reinforcement skeleton is hoisted in the UHPC pier column formwork, and the top and / or bottom end of the pier column reinforcement skeleton is exposed outside the UHPC pier column formwork to form the UHPC pier column mold.

[0017] In some of the embodiments, a plurality of first sleeves are embedded in the inner peripheral wall of the UHPC formwork, and a plurality of first connecting steel bars plugged into and matched with the first sleeves are tied to the outer peripheral wall of the pier column steel bar skeleton.

[0018] In some of the embodiments, a plurality of second sleeves are pre-embedded on the pier at the construction site and at the bottom of the pier cap mold, the top of the first connecting steel bar is plug-fitted with the second sleeve in the pier cap mold, and the bottom of the first connecting steel bar is plug-fitted with the second sleeve on the pier.

[0019] In some embodiments, the step S4 further includes a prefabrication step of a UHPC pier cap mold:

[0020] B1: Prefabricate the hollow UHPC pier cap formwork according to the construction requirements of the bridge components;

[0021] B2: Lay and tie the steel bars to form the pier cap steel skeleton according to the construction requirements of the bridge components;

[0022] B3: Hoist the pier cap reinforcement skeleton into the UHPC pier cap formwork to form a prefabricated UHPC pier cap mold.

[0023] In some of the embodiments, a plurality of third sleeves are embedded in the inner peripheral wall of the UHPC pier cap formwork, and a plurality of second connecting steel bars plugged and matched with the third sleeves are tied to the outer peripheral wall of the pier cap steel bar skeleton.

[0024] In some embodiments, the step S2 further includes a prefabrication step of the UHPC abutment mold:

[0025] D1: Prefabricate the hollow UHPC pier formwork according to the construction requirements of the pier;

[0026] D2: Lay and tie the steel bars to form the pier steel skeleton according to the construction requirements of the pier;

[0027] D3: Hoist the pier reinforcement skeleton into the UHPC pier formwork to form a prefabricated UHPC pier mold.

[0028] In some of the embodiments, a plurality of fourth sleeves are embedded in the inner peripheral wall of the UHPC abutment formwork, and a plurality of third connecting steel bars plugged and matched with the fourth sleeves are tied to the outer peripheral wall of the abutment steel bar skeleton.

[0029] The present invention also provides a prefabricated mold, which is used in the construction process of assembled UHPC bridge piers as described in any of the above items, including a plurality of UHPC templates, which are surrounded by a UHPC pier formwork, a UHPC pier cap formwork and a UHPC pier abutment formwork, and a pier column steel bar skeleton is arranged in the UHPC pier column formwork, a pier cap steel bar skeleton is arranged in the UHPC pier cap formwork, and a pier abutment steel bar skeleton is arranged in the UHPC pier abutment formwork.

[0030] In some of the embodiments, the top and bottom ends of the pier column reinforcement skeleton are extended outside the UHPC pier column formwork, the top end is connected to the UHPC pier cap formwork, and the bottom end is connected to the UHPC pier abutment formwork.

[0031] Based on the above technical solution, the prefabricated UHPC bridge pier construction process and the prefabricated mold for the prefabricated UHPC bridge pier construction process of the present invention have the following beneficial effects compared with the prior art:

[0032] 1. By prefabricating UHPC pier column molds, and then transporting the UHPC pier column molds to the construction site for intervals and then pouring concrete to form bridge piers for bridge construction, compared with the existing construction process of directly transporting prefabricated piers to the construction site for installation and construction, the UHPC pier column molds transported by the present invention are lighter, and the UHPC pier column molds can be disassembled and transported to the construction site for assembly, so that the UHPC molds have lower requirements on the carrying capacity and transportation space of the transportation vehicle, and more transportation routes can be selected, which improves the transportation efficiency, thereby improving the construction efficiency, and the molds made of UHPC materials do not need to be dismantled after construction, further improving the construction efficiency.

[0033] 2. By prefabricating the bridge components and piers in molds, the transportation efficiency and construction efficiency are improved compared to directly transporting the prefabricated bridge components and piers. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the process of Example 1 of the present invention;

[0035] Figure 2 This is a schematic diagram of the prefabrication process of the UHPC pier column mold according to Example 1 of the present invention;

[0036] Figure 3 This is a schematic diagram of the prefabrication process of the UHPC pier cap mold according to Example 1 of the present invention;

[0037] Figure 4 This is a schematic diagram of the prefabrication process of the UHPC abutment mold according to Example 1 of the present invention;

[0038] Figure 5 is a schematic diagram of a bridge pier of the present invention;

[0039] Figure 6 It is a schematic diagram of a UHPC pier formwork shell of a prefabricated mold according to Example 2 of the present invention;

[0040] Figure 7 A schematic diagram of a pier column reinforcement skeleton of a prefabricated mold according to Example 2 of the present invention;

[0041] Figure 8 Schematic diagram of a UHPC pier cap mold of a prefabricated mold according to Example 2 of the present invention. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0043] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0044] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] It should be noted that, in this document, “fixed to” or “connected to” may mean directly fixing or connecting to an element, or indirectly fixing or connecting to an element.

[0046] Embodiment 1:

[0047] like Figure 1-4 As shown, the present embodiment provides a construction process for an assembled UHPC bridge pier, comprising the following steps:

[0048] S1: Prefabricated UHPC pier mould;

[0049] S2: Transport the UHPC pier column mold to the construction site and hoist it to several piers on the construction site;

[0050] S3: pouring concrete into the UHPC pier column mold and solidifying to form a pier column;

[0051] S4: A prefabricated UHPC pier cap mold is set up on each pier column, and concrete is poured in each UHPC pier cap mold to form a bridge component. Two adjacent bridge components are connected to each other to form an integral bridge.

[0052] In some embodiments, the step S1 comprises the following steps:

[0053] A1: Prefabricate the hollow UHPC pier formwork according to the pier construction requirements;

[0054] A2: Lay and tie the steel bars to form the pier steel skeleton according to the pier construction requirements;

[0055] A3: The pier column reinforcement skeleton is hoisted in the UHPC pier column formwork, and the top and / or bottom end of the pier column reinforcement skeleton is exposed outside the UHPC pier column formwork to form the UHPC pier column mold.

[0056] In some of the embodiments, a plurality of first sleeves are embedded in the inner peripheral wall of the UHPC formwork, and a plurality of first connecting steel bars plugged into and matched with the first sleeves are tied to the outer peripheral wall of the pier column steel bar skeleton.

[0057] In some of the embodiments, a plurality of second sleeves are pre-embedded on the pier at the construction site and at the bottom of the pier cap mold, the top of the first connecting steel bar is plug-fitted with the second sleeve in the pier cap mold, and the bottom of the first connecting steel bar is plug-fitted with the second sleeve on the pier.

[0058] In some embodiments, the step S4 further includes a prefabrication step of a UHPC pier cap mold:

[0059] B1: Prefabricate the hollow UHPC pier cap formwork according to the construction requirements of the bridge components;

[0060] B2: Lay and tie the steel bars to form the pier cap steel skeleton according to the construction requirements of the bridge components;

[0061] B3: Hoist the pier cap reinforcement skeleton into the UHPC pier cap formwork to form a prefabricated UHPC pier cap mold.

[0062] In some of the embodiments, a plurality of third sleeves are embedded in the inner peripheral wall of the UHPC pier cap formwork, and a plurality of second connecting steel bars plugged and matched with the third sleeves are tied to the outer peripheral wall of the pier cap steel bar skeleton.

[0063] In some embodiments, the step S2 further includes a prefabrication step of the UHPC abutment mold:

[0064] D1: Prefabricate the hollow UHPC pier formwork according to the construction requirements of the pier;

[0065] D2: Lay and tie the steel bars to form the pier steel skeleton according to the construction requirements of the pier;

[0066] D3: Hoist the pier reinforcement skeleton into the UHPC pier formwork to form a prefabricated UHPC pier mold.

[0067] In some of the embodiments, a plurality of fourth sleeves are embedded in the inner peripheral wall of the UHPC abutment formwork, and a plurality of third connecting steel bars plugged and matched with the fourth sleeves are tied to the outer peripheral wall of the abutment steel bar skeleton.

[0068] The UHPC material described in this embodiment can be directly replaced by concrete casting or other materials in actual use, as long as it can be achieved without disassembling the mold after casting to form the bridge pier.

[0069] Embodiment 2:

[0070] like Figure 6-7 As shown, this embodiment provides a prefabricated mold, which is used in the assembled UHPC bridge pier construction process described in Example 1, including a plurality of UHPC templates, which are surrounded by a UHPC pier formwork 100, a UHPC pier cap formwork 200 and a UHPC pier abutment formwork 300, and a pier column steel bar skeleton 110 is arranged in the UHPC pier column formwork 100, a pier cap steel bar skeleton 210 is arranged in the UHPC pier cap formwork 200, and a pier abutment steel bar skeleton is arranged in the UHPC pier abutment formwork.

[0071] In some of the embodiments, the top and bottom ends of the pier column reinforcement skeleton 110 are extended outside the UHPC pier column formwork 100, the top end is connected to the UHPC pier cap formwork 200, and the bottom end is connected to the UHPC pier abutment formwork.

[0072] Since the prefabrication process of the UHPC pier formwork and the pier reinforcement skeleton is the same as the prefabrication process of the UHPC pier column formwork 100 and the pier column reinforcement skeleton 110, and the pier can be directly constructed on site by casting, the schematic diagram of the UHPC pier formwork and the pier reinforcement skeleton is not given here.

[0073] The locking assembly described in this embodiment adopts the locking assembly used in the prefabricated mold splicing in the prior art, such as a threaded locking structure, a pin tightening structure, a snap locking structure, a welding locking structure, etc.

[0074] After the construction is completed, the Figure 5 The bridge pier 300 shown includes a bottom abutment 310 , a pier column 320 on the abutment 310 , and a pier cap 330 on the pier column 320 .

[0075] The connection assembly described in this embodiment adopts the connection structure used in the prefabricated mold splicing in the prior art, such as a bolt connection structure, a plug connection structure, a welding connection structure, a mortise and tenon connection structure, etc.

[0076] The prefabricated mold provided in this embodiment can be used for bridge construction entities such as piers and bridge components.

[0077] The present invention provides an assembled UHPC bridge pier construction process and a prefabricated mold for the assembled UHPC bridge pier construction process. Compared with the prior art, the UHPC pier mold is prefabricated and then transported to the construction site for intervals and then poured with concrete to form bridge piers for bridge construction. Compared with the prior art construction process of directly transporting the prefabricated piers to the construction site for installation and construction, the UHPC pier mold transported by the present invention is lighter, and the UHPC pier mold can be disassembled and transported to the construction site for assembly, so that the UHPC mold has lower requirements on the carrying capacity and transportation space of the transport vehicle, more transportation routes can be selected, and the transportation efficiency is improved, thereby improving the construction efficiency. In addition, the mold made of UHPC material does not need to be dismantled after construction, further improving the construction efficiency.

[0078] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A construction process for assembled UHPC bridge piers, characterized in that: The following steps are involved: S1: Prefabricated UHPC pier mould; S2: Transport the UHPC pier column mold to the construction site and hoist it to several piers on the construction site; S3: pouring concrete into the UHPC pier column mold and solidifying to form a pier column; S4: A prefabricated UHPC pier cap mold is set up on each pier column, and concrete is poured in each UHPC pier cap mold to form a bridge component. Two adjacent bridge components are connected to each other to form an integral bridge.

2. The construction process of assembled UHPC bridge piers according to claim 1, characterized in that: The step S1 comprises the following steps: A1: Prefabricate the hollow UHPC pier formwork according to the pier construction requirements; A2: Lay and tie the steel bars to form the pier steel skeleton according to the pier construction requirements; A3: The pier column reinforcement skeleton is hoisted in the UHPC pier column formwork, and the top and / or bottom end of the pier column reinforcement skeleton is exposed outside the UHPC pier column formwork to form the UHPC pier column mold.

3. The construction process of assembled UHPC bridge piers according to claim 2, characterized in that: A plurality of first sleeves are embedded in the inner peripheral wall of the UHPC formwork, and a plurality of first connecting steel bars plugged and matched with the first sleeves are tied to the outer peripheral wall of the pier column steel bar skeleton.

4. The construction process of assembled UHPC bridge piers according to claim 3, characterized in that: A plurality of second sleeves are embedded on the pier at the construction site and at the bottom of the pier cap mold. The top of the first connecting steel bar is plugged into the second sleeve in the pier cap mold, and the bottom of the first connecting steel bar is plugged into the second sleeve on the pier.

5. The construction process for assembled UHPC bridge piers according to any one of claims 1 to 4, characterized in that: The step S4 also includes the prefabrication step of the UHPC pier cap mold: B1: Prefabricate the hollow UHPC pier cap formwork according to the construction requirements of the bridge components B2: Lay and tie the steel bars to form the pier cap steel skeleton according to the construction requirements of the bridge components; B3: Hoist the pier cap reinforcement skeleton into the UHPC pier cap formwork to form a prefabricated UHPC pier cap mold.

6. The construction process of assembled UHPC bridge piers according to claim 5, characterized in that: A plurality of third sleeves are embedded in the inner peripheral wall of the UHPC pier cap formwork, and a plurality of second connecting steel bars plugged and matched with the third sleeves are tied to the outer peripheral wall of the pier cap steel bar skeleton.

7. The construction process for assembled UHPC bridge piers according to any one of claims 1 to 4, characterized in that: The step S2 also includes the prefabrication step of the UHPC abutment mold: D1: Prefabricate the hollow UHPC pier formwork according to the construction requirements of the pier D2: Lay and tie the steel bars to form the pier steel skeleton according to the construction requirements of the pier; D3: Hoist the pier reinforcement skeleton into the UHPC pier formwork to form a prefabricated UHPC pier mold.

8. The construction process of assembled UHPC bridge piers according to claim 7, characterized in that: A plurality of fourth sleeves are embedded in the inner peripheral wall of the UHPC abutment formwork, and a plurality of third connecting steel bars plugged and matched with the fourth sleeves are tied to the outer peripheral wall of the abutment steel bar skeleton.

9. A prefabricated mold, characterized in that: The prefabricated UHPC bridge pier construction process applied to any one of claims 1 to 9 comprises a plurality of UHPC formworks, which are arranged to form a UHPC pier formwork, a UHPC pier cap formwork and a UHPC pier abutment formwork, and a pier formwork reinforcement skeleton is arranged in the UHPC pier formwork, a pier cap formwork reinforcement skeleton is arranged in the UHPC pier cap formwork, and a pier abutment formwork reinforcement skeleton is arranged in the UHPC pier formwork.

10. The prefabricated mold according to claim 9, characterized in that: The top and bottom ends of the pier column reinforcement skeleton both extend outside the UHPC pier column formwork, the top end is connected to the UHPC pier cap formwork, and the bottom end is connected to the UHPC pier abutment formwork.

Images