Steel box tied arch bridge large segment folding and butt joint construction method
By setting V-shaped notches on the base plate and web of the large segment of the steel box arch bridge, precise alignment and scribe cutting of the closing alignment are achieved, and the problem of cutting deviation caused by measurement errors when closing large segments is solved, and the problem of cutting deviation is improved. Quality control of welds.
Patent Information
- Application Number
- CN202411408015.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2024-12-20
AI Technical Summary
In the closing construction of steel box tie rod arch bridge, the measurement error is large when large sections are used, resulting in a large cutting deviation of the closing section, affecting the size and quality control of the weld.
By setting V-shaped notches on the bottom plate and one side web of the large segment, precise alignment and scribe cutting are achieved when closing alignment, ensuring the precise matching of the closing segment and reducing the impact of measurement errors.
The precise matching of the large sections of the steel box tie rod arch bridge is achieved, the size and quality control of the welds are improved, and the impact of measurement errors on the closing and cutting are avoided.
Smart Images
Figure CN119162920A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of bridge engineering construction, and in particular to a large-segment closing and butting construction method for a steel box tied arch bridge. Background Art
[0002] In recent years, steel box tie arch bridges have gradually been used in medium-span bridges, becoming an optional bridge structure for crossing roads and rivers. Closing construction is the key to the closing installation of steel box tie arch bridges. Generally, the arch rib closing section is set with a smaller length of segments for splicing and closing. When the construction environment is limited, large segments may be used for closing construction. When large segments are used for closing, it is difficult to measure the length of the closing mouth. Once the measurement error is large, it may lead to large deviations in the cutting and matching of the closing section, affecting the size and quality control of the closing section weld. Summary of the invention
[0003] The purpose of the present invention is to provide a construction method for closing and butting large sections of a steel box tied arch bridge in order to overcome the defects of the above-mentioned prior art. V-shaped grooves are set on the bottom plate and one side web of the large section cutting section. When closing and positioning, one end is aligned with the installed section, and then marking and cutting are performed to achieve accurate cutting of the closing section, thereby avoiding the influence of measurement errors on the closing and cutting.
[0004] The present invention provides a large-segment closing and butting construction method for a steel box tied arch bridge, comprising the following steps:
[0005] S1: The cutting section of the bottom plate of the closing section of the large segment closing section is provided with a bottom plate V-shaped notch, and the outer web plate of the closing section of the large segment closing section is provided with a web plate V-shaped notch;
[0006] S2: When closing and aligning, the V-shaped notch of the bottom plate and the closing mouth segment at the upper end are staggered and connected. After the connection, the cutting section is accurately marked to obtain the cutting line and cut to achieve accurate installation of the closing mouth;
[0007] S3: After the other end of the large segment closing section is aligned with the lower closing mouth section, the cross sections of the large segment closing section and the upper closing mouth section are overlapped and aligned;
[0008] The large segment closing section includes: a closing section top plate, a closing section bottom plate, a closing section inner web plate, and a closing section outer web plate.
[0009] Furthermore, in S2, before the installation of the closing section, the cutting length of the cutting section is preliminarily determined according to the measurement results, and the web plate V-shaped notch and the bottom plate V-shaped notch are set according to the cutting length.
[0010] Furthermore, the upper closing mouth segment includes: an upper closing mouth segment top plate, an upper closing mouth segment bottom plate, an upper closing mouth segment inner web plate, and an upper closing mouth segment outer web plate.
[0011] Furthermore, in S2, when closing and aligning, the top plate of the upper closing mouth segment of the installed arch rib end section enters the web V-shaped groove of the outer web of the closing segment, and the inner web of the upper closing mouth segment of the installed arch rib end section enters the bottom plate V-shaped groove of the bottom plate of the closing segment.
[0012] Furthermore, the lower end closing mouth segment includes: a lower end closing mouth segment top plate, a lower end closing mouth segment bottom plate, an inner side web plate of the lower end closing mouth segment, and an outer side web plate of the lower end closing mouth segment.
[0013] Furthermore, based on the cutting length determined by preliminary measurement, a web V-shaped notch and a bottom plate V-shaped notch with a depth L equal to the cutting length are provided on the bottom plate and one side web.
[0014] Furthermore, one side of the web V-shaped notch and the bottom plate V-shaped notch is parallel to the axis, and the other side is arranged obliquely.
[0015] Furthermore, the width of the root of the notch is the corresponding wall thickness δ of the box-type arch rib, the width of the end of the notch is the section height h, and the functional relationship between the chord length L1 of the closed section and the notch depth L is h×L / L1, which can meet the requirements of the alignment operation space.
[0016] Furthermore, in S3, during the alignment process, if the depth of the web V-notch and the bottom V-notch is insufficient, the web V-notch and the bottom V-notch can be supplemented on site to achieve overlapping alignment.
[0017] Furthermore, in S3, during the alignment process, if the depth of the web V-notch and the bottom V-notch is too large due to the measurement error of the closing mouth, only the root range of the notch needs to be supplemented when the closing weld is connected. The size of the ultra-wide welding powder is small and the quality can be controlled.
[0018] Compared with the prior art, the present invention has the following advantages:
[0019] In the method of the present invention, V-shaped grooves are provided on the bottom plate and one side web of the large segment cutting section, so that one end is aligned with the installed segment when closing and aligning, and then marking and cutting are performed to achieve accurate cutting of the closed section, thereby avoiding the influence of measurement errors on the closing and cutting. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a elevation view of the joint of the closing mouth in Example 1;
[0021] Figure 2 This is a plan view of the bottom plate of the closed mouth in Example 1;
[0022] Figure 3 It is a cross-sectional view of the overlapped and aligned closing mouth in Example 1;
[0023] Figure 4 Schematic diagram of the V-shaped notch of the web in Example 1.
[0024] Figure markings: 1-large segment closing section, 2-lower end closing mouth segment, 3-upper end closing mouth segment, 4-web V-shaped groove, 5-bottom plate V-shaped groove, 6-cutting line, 1-1-closing segment top plate, 1-2-closing segment bottom plate, 1-3-closing segment inner web, 1-4-closing segment outer web, 2-1-lower end closing mouth segment top plate, 2-2-lower end closing mouth segment bottom plate, 2-3-lower end closing mouth segment inner web, 2-4-lower end closing mouth segment outer web, 3-1-upper end closing mouth segment top plate, 3-2-upper end closing mouth segment bottom plate, 3-3-upper end closing mouth segment inner web, 3-4-upper end closing mouth segment outer web, 4-1-web V-shaped groove root, 4-2-web V-shaped groove end. DETAILED DESCRIPTION
[0025] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms and other features not clearly described in this technical solution are all considered to be common technical features disclosed in the prior art.
[0026] Example 1
[0027] This embodiment provides a method for closing and butting large sections of a steel box tied arch bridge. Figures 1 to 4 As shown, the following steps are included:
[0028] S1: The cutting section of the closing section bottom plate 1-2 of the large segment closing section 1 is provided with a bottom plate V-shaped notch 5, and the closing section outer web plate 1-4 of the large segment closing section 1 is provided with a web plate V-shaped notch 4;
[0029] S2: When closing and aligning, the V-shaped notch 5 of the bottom plate is staggered and butted with the upper closing mouth segment 3. After butting, the cutting and matching segments are accurately marked to obtain the cutting line 6 and cut, so as to achieve accurate installation of the closing mouth;
[0030] S3: After the other end of the large segment closing segment 1 is aligned with the lower closing mouth segment 2, the cross sections of the large segment closing segment 1 and the upper closing mouth segment 3 are overlapped and aligned;
[0031] The large segment closing section 1 includes: a closing section top plate 1-1, a closing section bottom plate 1-2, a closing section inner web plate 1-3, and a closing section outer web plate 1-4.
[0032] In a specific implementation, in S2, before the closing section is installed, the cutting length of the cutting section is preliminarily determined according to the measurement results, and the web V-shaped notch 4 and the bottom plate V-shaped notch 5 are set according to the cutting length.
[0033] In a specific embodiment, the upper closing mouth segment 3 includes: an upper closing mouth segment top plate 3-1, an upper closing mouth segment bottom plate 3-2, an upper closing mouth segment inner web plate 3-3, and an upper closing mouth segment outer web plate 3-4.
[0034] In a specific implementation, in S2, during closing and alignment, the top plate 3-1 of the upper closing mouth segment of the installed arch rib end section enters the web V-shaped groove 4 of the outer web 1-4 of the closing segment, and the inner web 3-3 of the upper closing mouth segment of the installed arch rib end section enters the bottom plate V-shaped groove 5 of the bottom plate 1-2 of the closing segment.
[0035] In a specific embodiment, the lower closing mouth segment 2 includes: a lower closing mouth segment top plate 2-1, a lower closing mouth segment bottom plate 2-2, a lower closing mouth segment inner web plate 2-3, and a lower closing mouth segment outer web plate 2-4.
[0036] In a specific implementation, a web V-shaped notch 4 and a bottom plate V-shaped notch 5 with a depth L the same as the cutting length are provided on the bottom plate and one side web according to the cutting length determined by preliminary measurement.
[0037] In a specific implementation, one side of the web V-shaped notch 4 and the bottom plate V-shaped notch 5 is parallel to the axis, and the other side is arranged obliquely.
[0038] In a specific embodiment, the width of the notch root is the wall thickness δ corresponding to the box-shaped arch rib, the width of the notch end is the section height h, and the functional relationship between the chord length L1 of the closed section and the notch depth L is h×L / L1, which can meet the requirements of the alignment operation space. The web V-shaped notch 4 includes a web V-shaped notch root 4-1 and a web V-shaped notch end 4-2.
[0039] In a specific implementation, in S3, during the alignment process, if the web V-shaped notch 4 and the bottom V-shaped notch 5 are not deep enough, the web V-shaped notch 4 and the bottom V-shaped notch 5 can be supplemented on site to achieve overlapping alignment.
[0040] In a specific implementation, in S3, during the alignment process, if the web V-shaped notch 4 and the bottom V-shaped notch 5 are too deep due to the measurement error of the closing mouth, only the root range of the notch needs to be supplemented during the closing weld connection. The ultra-wide welding powder is small in size and the quality can be controlled.
[0041] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.
[0042] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.
Claims
1. A method for closing and butting large sections of a steel box tied arch bridge, characterized in that: The following steps are involved: S1: The cutting section of the closing section bottom plate (1-2) of the large-segment closing section (1) is provided with a bottom plate V-shaped notch (5), and the closing section outer web plate (1-4) of the large-segment closing section (1) is provided with a web plate V-shaped notch (4); S2: When closing and aligning, the V-shaped notch (5) of the bottom plate and the closing mouth segment (3) at the upper end are staggered and butted, and after butting, the cutting and matching segments are accurately marked to obtain the cutting line (6) and cut, so as to achieve accurate installation of the closing mouth; S3: After the other end of the large segment closing section (1) is aligned with the lower closing opening section (2), the cross sections of the large segment closing section (1) and the upper closing opening section (3) are overlapped and aligned; The large segment closing section (1) comprises: a closing section top plate (1-1), a closing section bottom plate (1-2), a closing section inner web plate (1-3), and a closing section outer web plate (1-4).
2. The method for closing and butting large sections of a steel box tied arch bridge according to claim 1 is characterized in that: In S2, before the closing section is installed, the cutting length of the cutting section is preliminarily determined based on the measurement results, and the web plate V-shaped notch (4) and the bottom plate V-shaped notch (5) are set according to the cutting length.
3. The method for closing and butting large sections of a steel box tied arch bridge according to claim 1 is characterized in that: The upper closing mouth segment (3) comprises: an upper closing mouth segment top plate (3-1), an upper closing mouth segment bottom plate (3-2), an upper closing mouth segment inner web plate (3-3), and an upper closing mouth segment outer web plate (3-4).
4. The method for closing and butting large sections of a steel box tied arch bridge according to claim 3 is characterized in that: In S2, when closing and aligning, the top plate (3-1) of the upper closing opening segment of the installed arch rib end section enters the web V-shaped groove (4) of the outer web (1-4) of the closing segment, and the inner web (3-3) of the upper closing opening segment of the installed arch rib end section enters the bottom plate V-shaped groove (5) of the bottom plate (1-2) of the closing segment.
5. The method for closing and butting large sections of a steel box tied arch bridge according to claim 1 is characterized in that: The lower end closing mouth segment (2) comprises: a lower end closing mouth segment top plate (2-1), a lower end closing mouth segment bottom plate (2-2), an inner side web plate (2-3) of the lower end closing mouth segment, and an outer side web plate (2-4) of the lower end closing mouth segment.
6. The method for closing and butting large sections of a steel box tied arch bridge according to claim 1 is characterized in that: According to the cutting length determined by preliminary measurement, a web plate V-shaped notch (4) and a bottom plate V-shaped notch (5) with a depth L the same as the cutting length are arranged on the bottom plate and one side web plate.
7. The method for closing and butting large sections of a steel box tied arch bridge according to claim 1 is characterized in that: One side of the web V-shaped notch (4) and the bottom plate V-shaped notch (5) is parallel to the axis, and the other side is arranged obliquely.
8. The method for closing and butting large sections of a steel box tied arch bridge according to claim 6 is characterized in that: The width of the notch root is the corresponding wall thickness δ of the box-type arch rib, the width of the notch end is the section height h, and the functional relationship between the chord length L1 of the closed section and the notch depth L is h×L / L1, which can meet the requirements of the alignment operation space.
9. The method for closing and butting large sections of a steel box tied arch bridge according to claim 1 is characterized in that: In S3, during the alignment process, if the depth of the web plate V-shaped notch (4) and the bottom plate V-shaped notch (5) is insufficient, the web plate V-shaped notch (4) and the bottom plate V-shaped notch (5) can be supplemented on site to achieve overlapping alignment.
10. The method for closing and butting large sections of a steel box tied arch bridge according to claim 1 is characterized in that: In S3, during the alignment process, if the depth of the web V-shaped notch (4) and the bottom plate V-shaped notch (5) is too large due to the measurement error of the closing mouth, only the root range of the notch needs to be supplemented when the closing weld is connected.