River-crossing bridge pier body moving turnover formwork structure

Abstract

The utility model relates to a river-crossing bridge pier body moving rollover structure which comprises two thin-wall hollow bridge piers, a tower crane and a mold, the lower ends of the thin-wall hollow bridge piers are provided with pier column foundations, the lower end faces of the pier column foundations are provided with pier piles, the upper end faces of the pier column foundations are provided with tower feet, and the number of the thin-wall hollow bridge piers is two. The tower crane is arranged between the two thin-wall hollow piers, the bottom of the tower crane is connected to the tower feet, the top of the tower crane is connected with a lifting hook, and the thin-wall hollow piers are provided with mounting tables which are connected with the mold. The tower crane is arranged between the thin-wall hollow bridge piers, and the thin-wall hollow bridge piers are cast on the mounting table through the mold, so that a scaffold does not need to be additionally erected, the investment of the scaffold and a wood template is greatly reduced, and a mold turnover technology is applied to the construction technology of the hollow bridge piers; compared with the prior art that complicated scaffolds need to be built on the inner side and the outer side of the hollow pier, the construction workload and the construction difficulty are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a movable mold turning structure for a pier of a cross-river bridge. Background Art

[0002] In the existing bridge construction, thin-walled hollow piers with continuous steel structures are usually used for larger spans. Hollow thin-walled piers have the characteristics of super strong load-bearing capacity, good structural rigidity and strength, light weight, large section modulus and small cross-sectional area, and can save materials and reduce the weight of piers. At the same time, double-walled piers can improve the rigidity of piers, reduce the negative bending moment of the main beam support, and increase the beauty of bridges. Therefore, hollow thin-walled piers are widely used in high-altitude large-span bridges on railways and highways.

[0003] The patent number is CN201120032058.6, and the application date is 2011-01-30. It discloses a trestle for mountain bridges, including a wire rope cable wind cable, a trestle bracket, a support frame and a pier. One end of the wire rope cable wind cable is installed on the trestle bracket, and the other end of the wire rope cable wind cable is connected to a cable wind cable connector and fixed to the ground through the cable wind cable connector. The pier is a hollow rectangular pier with a variable cross-section. At least 2 rows of piers are arranged on the ground, and each row of piers has 4 piers. The piers are connected by trestle brackets. The wire rope cable wind cable is arranged between each row of piers. The trestle bracket is clamped with the pier every 4.2m to form a trestle bracket layer, and a scaffolding and a ladder are arranged on the trestle bracket layer.

[0004] The above patent is constructed by erecting span by span, so that the trestle support can be gradually raised as the pier is cast, which greatly improves the construction efficiency and shortens the construction period. In addition, the piers of this patent are hollow rectangular piers with variable cross-sections, which greatly improves the supporting strength of the bridge and improves the quality of the entire project. However, the use of scaffolding around the piers for formwork construction requires a large amount of construction materials, a long construction period, a lot of labor input, and low efficiency. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a movable mold turning structure for the pier of a cross-river bridge. Compared with the previous need to build complicated scaffolding on the inner and outer sides of the hollow pier, the construction workload and construction difficulty are greatly reduced.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A movable mold turning structure for a pier body of a cross-river bridge comprises a thin-walled hollow pier, a tower crane and a mold. A pier column foundation is arranged at the lower end of the thin-walled hollow pier, a pier pile is arranged at the lower end face of the pier column foundation, and a tower foot is arranged at the upper end face. There are two thin-walled hollow piers, and the tower crane is arranged between the two thin-walled hollow piers. The bottom of the tower crane is connected to the tower foot, and the top is connected to a hook. A mounting platform is arranged on the thin-walled hollow pier, and the mounting platform is connected to the mold.

[0008] The mounting platform is provided with a through hole and a zipper cord, and the zipper cord passes through the through hole and is connected with the mold.

[0009] An inclined ladder channel is arranged beside one of the thin-walled hollow bridge piers, the lower end of the inclined ladder channel is grounded, and the upper end of the inclined ladder channel extends to another thin-walled hollow bridge pier.

[0010] A grid is arranged between the thin-walled hollow bridge pier and the inclined ladder channel, and a support frame is arranged between the thin-walled hollow bridge pier and the tower crane.

[0011] The mold comprises an inner mold and an outer mold, and the inner mold and the outer mold are assembled together through a tie rod.

[0012] A cofferdam is also provided on the pier foundation and is installed on both sides between the thin-walled hollow piers.

[0013] The beneficial effects of the utility model are:

[0014] 1. By setting up tower cranes between thin-walled hollow piers, thin-walled hollow piers are cast on the installation platform through molds, without the need to set up additional scaffolding, which greatly reduces the investment in scaffolding and wooden formwork. The application of mold turning technology in the construction technology of hollow piers greatly simplifies the construction process of hollow piers. Compared with the previous need to build complicated scaffolding on the inner and outer sides of the hollow piers, the construction workload and construction difficulty are greatly reduced.

[0015] 2. The cofferdam is used to prevent the rising water from damaging the bottom of the tower crane, avoiding the conventional construction of the tower crane foundation on the riverbed and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 A three-dimensional diagram of the mold-turning for a thin-walled hollow bridge pier;

[0018] Figure 3 It is a plan view of the installation sequence of inner and outer molds;

[0019] As shown in the figure: 1-thin-walled hollow pier; 2-tower crane; 3-pier column foundation; 4-pier pile; 5-tower foot; 6-hook; 7-mould; 8-mounting table; 9-through hole; 10-zipper rope; 11-inclined ladder channel; 12-grid; 13-support frame; 14-inner mould; 15-outer mould; 16-pull rod; 17-cofferdam; 18-rebar. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figures 1 to 3 As shown, a movable mold turning structure for the pier of a cross-river bridge comprises a thin-walled hollow pier 1, a tower crane 2 and a mold 7. A pier column foundation 3 is arranged at the lower end of the thin-walled hollow pier 1, a pier pile 4 is arranged at the lower end face of the pier column foundation 3, and a tower foot 5 is arranged at the upper end face. There are two thin-walled hollow piers 1, and the tower crane 2 is arranged between the two thin-walled hollow piers 1. The bottom of the tower crane 2 is connected to the tower foot 5, and the top is connected to a hook 6. A mounting platform 8 is arranged on the thin-walled hollow pier 1, and the mounting platform 8 is connected to the mold 7.

[0022] The mounting platform 8 is provided with a through hole 9 and a zipper cord 10 , and the zipper cord 10 passes through the through hole 9 and is connected to the mold 7 .

[0023] An inclined ladder channel 11 is arranged beside one of the thin-walled hollow bridge piers 1 , the lower end of the inclined ladder channel 11 is grounded, and the upper end extends to another thin-walled hollow bridge pier 1 .

[0024] A grid 12 is provided between the thin-walled hollow bridge pier 1 and the inclined ladder passage 11 , and a support frame 13 is provided between the thin-walled hollow bridge pier 1 and the tower crane 2 .

[0025] The mold 7 includes an inner mold 14 and an outer mold 15 , and the inner mold 14 and the outer mold 15 are assembled together through a tie rod 16 .

[0026] A cofferdam 17 is also provided on the pier foundation 3 , and the cofferdam 17 is installed on both sides between the thin-walled hollow piers 1 .

[0027] After the construction of the pier piles 1 and the pier column foundation 3, the tower crane 2 is directly installed between the two thin-walled hollow piers 1 to be constructed, and the tower foot 5 is directly buried in the pier column foundation 3; the bottom area between the tower crane 2 and the thin-walled hollow pier 1 is inlaid with a water-blocking cofferdam 17 to prevent the bottom of the tower crane 2 from being damaged by rising water, avoiding the conventional construction of a tower crane foundation on the riverbed, and saving costs.

[0028] An inclined ladder channel 11 is installed on one side of the thin-walled hollow bridge pier 1. The inclined ladder channel 11 is provided with an inclined step and a channel. The two thin-walled hollow bridge piers 1 are connected in the air by the inclined ladder channel 11 due to the height difference. This avoids the conventional need to set up two inclined ladder channels 11, thus saving materials. The inclined ladder channel 11 and the thin-walled hollow bridge pier 1 are reinforced with a grid 12.

[0029] The two thin-walled hollow bridge piers 1 are constructed by alternately moving and turning over the upper and lower molds, that is, the lower mold of one thin-walled hollow bridge pier is used for the upper mold of the other thin-walled hollow bridge pier, and a total of three molds are used for the two thin-walled hollow bridge piers 1; the lower mold is removed by first pulling it with a zipper rope 10 through the through hole 9 of the installation platform 8, and then it is lifted to the construction area for installation by the hook 6 on the tower crane 2; the two thin-walled hollow bridge piers 1 are respectively subjected to the steel bar binding, inner and outer mold support reinforcement, concrete pouring and maintenance, and the alternate mold shifting construction is completed by utilizing the difference; the steel bars 18 are continuously extended as the thin-walled hollow bridge pier construction rises, the installation platform 8 is provided with four layers, and the two thin-walled hollow bridge piers 1 are constructed by shifting the mold to save one mold.

[0030] The inner and outer molds of the thin-walled hollow pier 1 are installed in sequence at the same time. The inner and outer molds on the front and rear sides are installed first; the inner and outer molds on the left side are installed secondly, and finally the inner and outer molds on the four arc-shaped short sides on the right side are installed.

[0031] As the height of the tower crane 2 increases, a support frame is installed between the tower crane 2 and the thin-walled hollow pier 1, and a protective sleeve is installed at the part where the box girder meets the tower crane. The construction materials are transported to the construction area through the hook 6 on the tower crane 2.

[0032] By arranging a tower crane 2 between the thin-walled hollow piers 1, the thin-walled hollow piers 1 are cast on the mounting platform 8 through the mold 7, without the need to set up additional scaffolding, which greatly reduces the investment in scaffolding and wooden formwork. The mold turning technology is applied to the construction technology of the hollow piers, which greatly simplifies the construction process of the hollow piers. Compared with the previous need to build complicated scaffolding on the inner and outer sides of the hollow piers, the construction workload and construction difficulty are greatly reduced.

[0033] The cofferdam 17 prevents the bottom of the tower crane 2 from being damaged by rising water, avoids the conventional construction of a tower crane foundation on the riverbed, and saves costs.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A movable mold turning structure for a pier of a cross-river bridge, comprising a thin-walled hollow pier (1), a tower crane (2) and a mold (7), characterized in that: The lower end of the thin-walled hollow pier (1) is provided with a pier column foundation (3), the lower end face of the pier column foundation (3) is provided with a pier pile (4), and the upper end face is provided with a tower foot (5). There are two thin-walled hollow piers (1), and the tower crane (2) is arranged between the two thin-walled hollow piers (1). The bottom of the tower crane (2) is connected to the tower foot (5), and the top is connected to a hook (6). A mounting platform (8) is provided on the thin-walled hollow pier (1), and the mounting platform (8) is connected to the mold (7).

2. A movable mold turning structure for a pier of a cross-river bridge as claimed in claim 1, characterized in that: The mounting platform (8) is provided with a through hole (9) and a zipper cord (10), and the zipper cord (10) passes through the through hole (9) and is connected to the mold (7).

3. The movable mold turning structure for the pier of a cross-river bridge according to claim 1, characterized in that: An inclined ladder channel (11) is arranged next to one of the thin-walled hollow bridge piers (1), the lower end of the inclined ladder channel (11) is grounded, and the upper end extends to another thin-walled hollow bridge pier (1).

4. A movable overmolding structure for a pier of a cross-river bridge as claimed in claim 3, characterized in that: A grid (12) is provided between the thin-walled hollow bridge pier (1) and the inclined ladder passage (11), and a support frame (13) is provided between the thin-walled hollow bridge pier (1) and the tower crane (2).

5. The movable mold turning structure for the pier of a cross-river bridge according to claim 1, characterized in that: The mold (7) comprises an inner mold (14) and an outer mold (15), and the inner mold (14) and the outer mold (15) are assembled together via a tie rod (16).

6. The movable mold turning structure for the pier of a cross-river bridge according to claim 1, characterized in that: A cofferdam (17) is also provided on the pier foundation (3), and the cofferdam (17) is installed on both sides between the thin-walled hollow bridge piers (1).

Images