Continuous steel structure bridge side span cast-in-place formwork structure

Abstract

The utility model relates to a continuous steel structure bridge side span cast-in-place formwork structure which comprises a plurality of stand columns arranged at intervals and linearly arranged. The connecting cross beam is fixed to the tops of the stand columns; the bailey trusses are arranged at the top of the connecting cross beam at intervals; the upper cross beams are arranged at the tops of the bailey trusses and arranged in the arrangement direction of the stand columns, a plurality of connecting rods are arranged at the bottoms of the upper cross beams, and the bottoms of the connecting rods extend to the lower portions of the bailey trusses to form connecting ends; the lower cross beam is fixedly mounted at the connecting ends of the connecting rods, and a pouring template is arranged on the lower cross beam.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a cast-in-place formwork structure for a side span of a continuous steel structure bridge. Background Art

[0002] The traditional cast-in-place method for the side spans of continuous steel bridges is to set up supports at the bottom of the steel bridge to support the casting formwork. However, generally speaking, the height of a steel bridge is relatively high. If supports are set up on the ground and raised to the casting height, the process of setting up the tall supports will increase costs and safety risks. After the construction is completed, the supports are difficult to recycle and the recycling rate is low. In addition, when setting up the supports, it is often necessary to level the ground where the supports are set. For steep slopes, a large amount of earth needs to be excavated, which increases the construction cost. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a cast-in-place formwork structure for the side span of a continuous steel structure bridge. By arranging Bailey frames and upper beams on the columns, and hanging lower beams through the upper beams, the casting formwork is installed on the lower beams, thereby avoiding the need to set up a large number of brackets to support the formwork, saving costs and simplifying the construction process.

[0004] The technical solution to achieve the above purpose is a continuous steel bridge side span cast-in-place formwork structure, including:

[0005] A plurality of columns arranged at intervals and in a straight line;

[0006] A connecting beam fixed to the top of several columns;

[0007] A plurality of Bailey frames spaced apart on the top of the connecting beam;

[0008] An upper crossbeam is arranged on the top of a plurality of Bailey frames and along the arrangement direction of the columns, a plurality of connecting rods are arranged at the bottom of the upper crossbeam, and the bottom of the connecting rod extends below the Bailey frames to form a connecting end; and

[0009] A lower cross beam is fixedly mounted on the connecting ends of a plurality of the connecting rods, and a casting template is arranged on the lower cross beam.

[0010] Furthermore, a plurality of the columns are symmetrically arranged in two rows, two connecting beams are arranged corresponding to the two rows of columns, and the Bailey frames are arranged on the two connecting beams.

[0011] Furthermore, a plurality of the upper cross beams are arranged at intervals, and a plurality of the lower cross beams are arranged corresponding to the upper cross beams.

[0012] Furthermore, an operating platform is provided between the Bailey frames.

[0013] Furthermore, the connecting rod is made of threaded steel.

[0014] Furthermore, a counterweight water tank is provided in the casting formwork, and the amount of water in the counterweight water tank is determined according to the requirements of the site.

[0015] Furthermore, a plurality of longitudinal beams are arranged between the lower cross beam and the casting formwork.

[0016] Furthermore, the column is formed by pouring concrete in a spiral tube.

[0017] Furthermore, a limiting rod is connected between the upper crossbeam and the casting formwork.

[0018] Furthermore, the connecting beam is made of I-beam.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. Strong adaptability, not affected by terrain and bridge building height;

[0021] 2. The construction process is simple, using less materials and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is an overall structural diagram of a cast-in-place formwork structure for a side span of a continuous steel structure bridge.

[0023] Figure 2 This is a casting effect diagram of a cast-in-place formwork structure for a side span of a continuous steel structure bridge of the utility model.

[0024] Legend: 1. Column; 2. Connecting beam; 3. Lower beam; 4. Longitudinal beam; 5. Connecting rod; 6. Bailey frame; 7. Upper beam; 8. Casting formwork; 9. Limit rod. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] See also Figure 1 A cast-in-place formwork structure for the side span of a continuous steel structure bridge, the construction structure comprising: a column 1, a connecting beam 2, a Bailey frame 6, an upper beam 7, a connecting rod 5 and a lower beam 3; a column 1 is set in the construction area, and the connecting beam 2 and the Bailey frame 6 are fixedly installed on the column 1, the upper beam 7 is fixed to the top of the Bailey frame 6 by a crane, and the connecting rod 5 is fixed on the upper beam 7, and the lower beam 3 is fixed at the bottom of the connecting rod 5, and a casting template 8 is set on the lower beam 3, and concrete is poured in the casting template 8, so as to achieve rapid casting of the side span of the steel structure bridge, and after the casting of this section of the side span is completed, the next section of the side span is constructed by the same construction method.

[0027] Furthermore, a plurality of auxiliary brackets are provided on the lower cross beam 3. After the lower cross beam 3, the auxiliary brackets and the casting template 8 are bottled on the ground, the lower cross beam 3 is lifted by a crane or a tower crane. The connecting rod 5 passes through the lower cross beam 3 and is threadedly connected with a fixing nut at the bottom of the lower cross beam 3 to increase the connection strength between the lower cross beam 3 and the connecting rod 5.

[0028] Further, a plurality of the columns 1 are symmetrically arranged in two rows, two connecting beams 2 are arranged corresponding to the two rows of columns 1, and the Bailey frame 6 is arranged on two connecting beams 2. By arranging the columns 1 in two rows, the installation strength of the Bailey frame 6 is increased.

[0029] Furthermore, a plurality of upper cross beams 7 are arranged at intervals, and a plurality of lower cross beams 3 are arranged corresponding to the upper cross beams 7 .

[0030] Furthermore, an operating platform is provided between the Bailey frames 6. In the process of hoisting the lower cross beam 3, a wooden formwork or a steel plate is used to set up a stable operating platform inside the Bailey beam to improve the safety factor of personnel operation and facilitate the subsequent construction of personnel.

[0031] Furthermore, the connecting rod 5 is made of threaded steel.

[0032] Furthermore, a counterweight water tank is provided in the casting formwork 8, and the amount of water in the counterweight water tank is determined according to the requirements of the site. By providing a counterweight water tank in the casting formwork 8 to pre-press the formwork, the required pre-pressing weight is about 1.3 times the weight of the cast-in-place or joint section of the side span. During the whole pre-pressing process, the measurement, monitoring and data recording are strictly carried out according to the plan to ensure the elimination of inelastic deformation of the structure. The weight of the side span hanger and the side span water tank are combined to make flexible adjustments in different construction stages to ensure that the weight of both ends of the cantilever is balanced during the whole construction process. During the whole process, the corresponding weight addition and subtraction are obtained through precise calculation according to the on-site working conditions, and the scale should be accurately marked in the water tank to ensure the operation accuracy.

[0033] Furthermore, a plurality of longitudinal beams 4 are arranged between the lower cross beam 3 and the casting formwork 8 .

[0034] Furthermore, the column 1 is formed by pouring concrete in a spiral tube.

[0035] Furthermore, a limiting rod 9 is connected between the upper cross beam 7 and the casting formwork 8 .

[0036] Furthermore, the connecting beam 2 is made of I-beam.

[0037] The following is an explanation of the use process of the cast-in-place formwork structure for the side span of a continuous steel structure bridge according to the utility model.

[0038] A column 1 is set in the construction area, and a connecting beam 2 and a Bailey frame 6 are fixedly installed on the column 1. The upper beam 7 is fixed to the top of the Bailey frame 6 by a crane, and a connecting rod 5 is fixed on the upper beam 7, and a lower beam 3 is fixed at the bottom of the connecting rod 5. A casting template 8 is set on the lower beam 3. Before casting the casting template 8, the casting template 8 is pre-pressed to ensure that the non-elastic deformation in the steel bridge structure is eliminated, and concrete is poured in the casting template 8, so as to achieve rapid casting of the side span of the steel structure bridge. After the casting of this section of the side span is completed, the cast side span is maintained, and the next section of the side span is constructed by the same construction method; when constructing the faster section of the joint section, the concrete and steel bars required to be used need to be consistent with those of the joint section.

[0039] The utility model is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various variations of the utility model according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the utility model, and the scope of protection of the utility model shall be defined by the scope of the attached claims.

Claims

1. A cast-in-place formwork structure for the side span of a continuous steel structure bridge, characterized in that: include: A plurality of columns arranged at intervals and in a straight line; A connecting beam fixed to the top of several columns; A plurality of Bailey frames spaced apart on the top of the connecting beam; An upper crossbeam is arranged on the top of a plurality of Bailey frames and along the arrangement direction of the columns, a plurality of connecting rods are arranged at the bottom of the upper crossbeam, and the bottom of the connecting rod extends below the Bailey frames to form a connecting end; as well as A lower cross beam is fixedly mounted on the connecting ends of a plurality of the connecting rods, and a casting template is arranged on the lower cross beam.

2. The cast-in-place formwork structure for the side span of a continuous steel structure bridge according to claim 1 is characterized by: A plurality of the columns are symmetrically arranged in two rows, two connecting beams are arranged corresponding to the two rows of columns, and the Bailey frames are arranged on the two connecting beams.

3. The cast-in-place formwork structure for the side span of a continuous steel structure bridge according to claim 1 is characterized by: A plurality of upper cross beams are arranged at intervals, and a plurality of lower cross beams are arranged corresponding to the upper cross beams.

4. The cast-in-place formwork structure for the side span of a continuous steel structure bridge according to claim 1 is characterized by: An operating platform is arranged between the Bailey frames.

5. The cast-in-place formwork structure for the side span of a continuous steel structure bridge according to claim 1 is characterized by: The connecting rod is made of threaded steel.

6. The cast-in-place formwork structure for the side span of a continuous steel structure bridge according to claim 1 is characterized by: A counterweight water tank is provided in the casting formwork, and the amount of water in the counterweight water tank is determined according to the requirements on site.

7. The cast-in-place formwork structure for the side span of a continuous steel bridge according to claim 1 is characterized by: A plurality of longitudinal beams are arranged between the lower cross beam and the casting formwork.

8. The cast-in-place formwork structure for the side span of a continuous steel structure bridge according to claim 1 is characterized by: The column is formed by pouring concrete in a spiral tube.

9. The cast-in-place formwork structure for the side span of a continuous steel structure bridge according to claim 1 is characterized by: A limiting rod is connected between the upper cross beam and the casting template.

10. The cast-in-place formwork structure for the side span of a continuous steel bridge according to claim 1 is characterized by: The connecting crossbeam is made of I-beam.

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