Portable guide beam for incremental launching construction of large-span flat type steel structure arched beam combination bridge

Abstract

The utility model discloses a portable guide beam for incremental launching construction of a large-span flat type steel structure arched beam combination bridge, which comprises two symmetrical groups of guide beam main beams which comprise a guide beam main beam horn section, a guide beam main beam first uniform-section section, a guide beam main beam variable-section section and a guide beam main beam second uniform-section section which are connected in sequence, and a plurality of guide beam main beams which are arranged on the guide beam main beam horn section, the guide beam main beam first uniform-section section, the guide beam main beam variable-section section and the guide beam main beam second uniform-section section. The transverse connection mechanism is arranged between the guide beam main beam horn section and the guide beam main beam first uniform-section section and comprises a transverse connection beam, two inclined connection beams and a longitudinal connection beam, the two ends of the transverse connection beam are connected with the guide beam main beam first uniform-section section respectively, the number of the inclined connection beams is two, and the longitudinal connection beam is connected with the guide beam main beam horn section. Wherein one end of each longitudinal connecting beam is connected with the middle of the transverse connecting beam, the other end of each longitudinal connecting beam is connected with the rear end of the horn section of the guide beam main beam, and one end of each longitudinal connecting beam is connected with the middle of the transverse connecting beam. Under the condition of the same rigidity of the guide beam, the height, the width and the length of the portable guide beam can be reduced, and the portable guide beam is more suitable for incremental launching construction of a flat type steel structure arched beam combination bridge with a small web height.

Description

Technical Field

[0001] The utility model relates to the technical field of steel box beam jacking, in particular to a portable guide beam used for jacking construction of a large-span flat steel structure arch beam composite bridge. Background Art

[0002] With the development of bridge construction technology, guide beams have become indispensable equipment in the construction process. They are temporary steel structures installed at the front end of the bridge beam body to ensure the longitudinal anti-overturning stability of the beam body when it moves, thereby reducing the internal force of the main beam during the jacking process, increasing the jacking span, and enhancing the spanning capacity of the main beam.

[0003] At present, there are mainly two types of steel guide beam structures used in actual projects: truss guide beams (truss beams) composed of rods or variable-section I-shaped steel guide beams (steel plate beams). Among them, variable-section I-shaped steel guide beams have great advantages in terms of force and are easy to construct. They are widely used in the construction of large and extra-large bridges.

[0004] However, the above two guide beam structures are not suitable for large-span flat steel arch-beam composite bridges, because the bridge web height of the structure is small, and the height of the guide beam needs to match the height of the bridge web. Therefore, the guide beam must also be designed to be smaller in height. In the case of a smaller height, the structural forms of the truss guide beam and the variable-section I-beam steel guide beam do not meet the requirements of jacking strength and verification. Utility Model Content

[0005] The utility model discloses a lightweight guide beam for the top-pushing construction of a large-span flat steel structure arch-beam composite bridge. Under the condition of equal guide beam stiffness, the lightweight guide beam can reduce the height, width and length, and is more suitable for the top-pushing construction of a flat steel structure arch-beam composite bridge with a smaller web height.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] A light guide beam for top-pushing construction of a large-span flat steel structure arch-beam composite bridge, comprising:

[0008] The guide beam main beam is provided with two symmetrical groups, including a guide beam main beam horn section, a guide beam main beam first uniform cross-section section, a guide beam main beam variable cross-section section and a guide beam main beam second uniform cross-section section connected in sequence, each including a guide beam main beam top plate, a guide beam main beam bottom plate, a guide beam main beam web plate and a guide beam main beam cross-section plate, the guide beam main beam horn section, the guide beam main beam first uniform cross-section section, the guide beam main beam variable cross-section section and the guide beam main beam second uniform cross-section section The guide beam main beam bottom plate is on the same plane, the guide beam main beam horn section, the guide beam main beam first uniform cross-section section and the guide beam main beam second uniform cross-section section The guide beam main beam top plate is parallel to the guide beam main beam bottom plate, and the guide beam main beam horn section and the guide beam main beam first uniform cross-section section are connected to the guide beam main beam bottom plate. The top plate of the guide beam main beam of the first uniform cross-section section is higher than the plane where the top plate of the guide beam main beam of the second uniform cross-section section of the guide beam main beam is located, the top plate of the guide beam main beam of the first uniform cross-section section of the guide beam main beam is connected with the top plate of the guide beam main beam of the second uniform cross-section section of the guide beam main beam through the top plate of the guide beam main beam of the variable cross-section section, two guide beam main beam web plates are spaced apart and connected between the top plate of the guide beam main beam and the bottom plate of the guide beam main beam along the length direction, and a plurality of guide beam main beam cross-partition plates are spaced apart and connected along the width direction, the top plate of the guide beam main beam and the bottom plate of the guide beam main beam of the horn section of the guide beam main beam are in a trapezoidal shape with a rear side length greater than a front side length, and the spacing between the rear ends of the guide beam main beam web plates of the horn section of the guide beam main beam is greater than the spacing between the front ends;

[0009] A transverse connecting mechanism is arranged between the horn section of the guide beam main beam and the first uniform cross-section section of the guide beam main beam, and includes a transverse connecting beam, an oblique connecting beam and a longitudinal connecting beam. The two ends of the transverse connecting beam are respectively connected to the first uniform cross-section section of the guide beam main beam. Two oblique connecting beams are arranged, one end of which is respectively connected to the middle part of the transverse connecting beam, and the other end is respectively connected to the rear end of the horn section of the guide beam main beam of the two guide beam main beams. One end of the longitudinal connecting beam is connected to the middle part of the transverse connecting beam, and the other end extends backward for connection with the combined bridge.

[0010] Furthermore, the guide beam main beam top plate, guide beam main beam bottom plate, guide beam main beam web plate and guide beam main beam cross partition are all made of steel plates.

[0011] Furthermore, the spacing between the webs of the guide beam main beam is 1 / 2-2 / 3 of the width of the top plate of the guide beam main beam.

[0012] Furthermore, the guide beam main beam cross-plate includes a first guide beam main beam cross-plate and a second guide beam main beam cross-plate, 3-7 first guide beam main beam cross-plates are arranged at the connecting position of the guide beam main beam horn section and the first equal cross-section section of the guide beam main beam, and the spacing between adjacent first guide beam main beam cross-plates is 0.2-0.4m, and second guide beam main beam cross-plates are arranged at the remaining positions, and the spacing between adjacent second guide beam main beam cross-plates is 1.2-2.5m.

[0013] Furthermore, a stiffening plate is connected to the outer side of the position where the guide beam main beam trumpet section and the guide beam main beam first uniform cross-section section are connected to the guide beam main beam top plate and the guide beam main beam bottom plate.

[0014] Furthermore, the transverse connecting beam, the oblique connecting beam and the longitudinal connecting beam all include connecting rods and oblique braces. Two connecting rods are provided, and the oblique braces are connected between them. The oblique braces are connected to the connecting rods in a triangle shape.

[0015] Furthermore, the connecting rod is made of channel steel, and the diagonal brace is made of angle steel.

[0016] The above-mentioned lightweight guide beam used for the top-pushing construction of a large-span flat steel structure arch-beam composite bridge has the following advantages:

[0017] (1) The utility model breaks the high, wide and large structure of the traditional truss guide beam and the variable-section I-shaped steel guide beam, and uses a small box beam supported by two guide beam main beam webs as the design basis. Under the premise of meeting the requirements of the same guide beam stiffness, the lightweight guide beam of the utility model can reduce the height, width and length, and is more suitable for the top-pushing construction of flat steel structure arch beam composite bridges with smaller web heights. At the same time, it can save more than 30% of steel usage compared with traditional guide beams.

[0018] (2) The top plate, bottom plate, web plate and cross plate of the guide beam of the utility model are all made of steel plates. In particular, the top plate and bottom plate of the guide beam can be made of a whole large steel plate, which enhances the integrity of the guide beam. At the same time, after the jacking construction is completed, they can be cut and reused. The material turnover rate can reach more than 80%, which further saves material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the top structure of an embodiment of the utility model.

[0020] Figure 2 yes Figure 1 Schematic diagram of the main structure of the center guide beam.

[0021] Figure 3 yes Figure 2 Schematic diagram of the structure viewed from above.

[0022] Figure 4 yes Figure 2 Schematic diagram of the enlarged structure of the left view of the second equal cross-section section of the center guide beam main beam.

[0023] Figure 5 yes Figure 1 Schematic diagram of the left-side structure of the central horizontal connecting beam.

[0024] In the figure, the guide beam main beam 1, the guide beam main beam horn section 101, the guide beam main beam first uniform cross-section section 102, the guide beam main beam variable cross-section section 103, the guide beam main beam second uniform cross-section section 104, the guide beam main beam top plate 111, the guide beam main beam cross partition 112, the guide beam main beam web 113, the guide beam main beam bottom plate 114, the transverse connecting mechanism 2, the transverse connecting beam 201, the diagonal connecting beam 202, the longitudinal connecting beam 203, the connecting rod 211, and the diagonal brace 212. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present utility model, it should be noted that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present utility model.

[0027] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] A lightweight guide beam for top-pushing construction of a large-span flat steel structure arch-beam composite bridge, combined with Figure 1 As shown, it includes a guide beam main beam 1 and a transverse connection mechanism 2, wherein: the guide beam main beam 1 is provided with two symmetrical groups, combined with Figure 2-4As shown, the guide beam main beam horn section 101, the guide beam main beam first uniform cross-section section 102, the guide beam main beam variable cross-section section 103 and the guide beam main beam second uniform cross-section section 104 are connected in sequence, each of which includes a guide beam main beam top plate 111, a guide beam main beam bottom plate 114, a guide beam main beam web plate 113 and a guide beam main beam cross-section plate 112. The guide beam main beam horn section 101, the guide beam main beam first uniform cross-section section 102, the guide beam main beam variable cross-section section 103 and the guide beam main beam second uniform cross-section section 104 are connected in sequence. On the same plane, the guide beam main beam horn section 101, the guide beam main beam first uniform cross-section section 102, the guide beam main beam variable cross-section section 103 and the guide beam main beam second uniform cross-section section 104 of the guide beam main beam bottom plate 114 can be made of the same material, so as to maintain the integrity and stability of the entire guide beam main beam bottom plate 114 and improve the overall rigidity; the guide beam main beam horn section 101, the guide beam main beam first uniform cross-section section 102 and the guide beam main beam second uniform cross-section section 104 of the guide beam main beam top plate 111 and the guide beam main beam bottom plate 114 4, and the guide beam main beam horn section 101 and the guide beam main beam top plate 111 of the guide beam main beam first uniform cross-section section 102 are higher than the plane where the guide beam main beam top plate 111 of the guide beam main beam second uniform cross-section section 104 is located, and the guide beam main beam top plate 111 of the guide beam main beam first uniform cross-section section 102 and the guide beam main beam top plate 111 of the guide beam main beam second uniform cross-section section 104 are connected through the guide beam main beam top plate 111 of the guide beam main beam variable cross-section section 103; the guide beam main beam horn section 101 is the part connected to the combined bridge, and needs to be connected with The web spacing of the combined bridge body is matched, so it is designed to be trumpet-shaped. Since the height of the web of the combined bridge body itself is already relatively small, the height of the trumpet section 101 of the guide beam main beam and the first uniform cross-section section 102 of the guide beam main beam generally match the web height of the combined bridge body. The cross-sectional area decreases successively from the first uniform cross-section section 102 of the guide beam main beam to the second uniform cross-section section 104 of the guide beam main beam through the guide beam main beam variable cross-section section 103. While the guide beam meets the force requirements, the deflection value of the front end of the guide beam is reduced.In order to further ensure the structural rigidity and stability of the guide beam, two guide beam main beam webs 113 are connected between the guide beam main beam top plate 111 and the guide beam main beam bottom plate 114 along the length direction. The guide beam main beam web 113 runs through the entire length range of the guide beam main beam 1, and a plurality of guide beam main beam cross diaphragms 112 are connected at intervals along the width direction. The cross diaphragms 112 are arranged between the guide beam main beam webs 113. Of course, according to the circumstances, they can also extend to the entire width range of the guide beam main beam 1. The guide beam main beam top plate 111 and the guide beam main beam bottom plate 114 of the guide beam main beam horn section 101 are trapezoidal in shape, with the rear side length being greater than the front side length. The spacing between the rear ends of the guide beam main beam webs 113 of the guide beam main beam horn section 101 is greater than the spacing between the front ends. The rear ends of the guide beam main beam webs 113 are connected to the webs of the combined bridge body. Therefore, the spacing between the rear ends of the guide beam main beam webs 113 is the webs adjacent to the combined bridge body. The spacing between the plates corresponds to each other; the transverse connecting mechanism 2, which is arranged between the guide beam main beam horn section 101 and the guide beam main beam first uniform cross-section section 102, includes a transverse connecting beam 201, an oblique connecting beam 202 and a longitudinal connecting beam 203, and the two ends of the transverse connecting beam 201 are respectively connected to the guide beam main beam first uniform cross-section section 102, preferably one end closer to the guide beam main beam variable cross-section section 103, and two oblique connecting beams 202 are arranged, one end of which is respectively connected to the middle part of the transverse connecting beam 201, and the other end is respectively connected to the rear end of the guide beam main beam horn section 101 of the two guide beam main beams 1, that is, the transverse connecting beam 201 and the two oblique connecting beams 202 form a K-shaped structure, one end of the longitudinal connecting beam 203 is connected to the middle part of the transverse connecting beam 201, and the other end extends vertically backward, perpendicular to the transverse connecting beam 201, and is used to connect to the combined bridge, and its length is to the connecting line of the rear ends of the two groups of guide beam main beams 1, which can just be connected to the combined bridge body.

[0029] Furthermore, the top plate 111 of the guide beam main beam, the bottom plate 114 of the guide beam main beam, the web plate 113 of the guide beam main beam and the cross diaphragm 112 of the guide beam main beam are all made of steel plates, and in this embodiment, Q355 steel plates are used. The top plate 111 of the guide beam main beam and the bottom plate 114 of the guide beam main beam can be cut into an integral strip shape using a large piece of steel plate, and welding is performed if the length is insufficient, thereby enhancing the integrity of the entire set of guide beam main beams 1, and the processing is convenient. After use, it can be cut and reused, and the material turnover rate can reach 80%, further reducing the material cost.

[0030] Further, combined with Figure 4 As shown, the spacing between the webs 113 of the guide beam main beam is 1 / 2-2 / 3 of the width of the guide beam main beam top plate 111. In this embodiment, the width of the guide beam main beam top plate 111 and the guide beam main beam bottom plate 114 is the same, which is 0.8m. Then the spacing between the webs 113 of the guide beam main beam is 0.4m, and the distance from the outer edge of the guide beam main beam top plate 111 and the guide beam main beam bottom plate 114 is 0.2m.

[0031] Furthermore, the guide beam main beam diaphragm 112 includes a first guide beam main beam diaphragm and a second guide beam main beam diaphragm. 3-7 first guide beam main beam diaphragms are arranged at the connection position of the guide beam main beam horn section 101 and the guide beam main beam first uniform cross-section section 102, and the spacing between adjacent first guide beam main beam diaphragms is 0.2-0.4m. Second guide beam main beam diaphragms are arranged at other positions, and the spacing between adjacent second guide beam main beam diaphragms is 1.2-2.5m. In this embodiment, 3 first guide beam main beam diaphragms are arranged at the connection position of the guide beam main beam horn section 101 and the guide beam main beam first uniform cross-section section 102, with a spacing of 0.3m. One of the first guide beam main beam diaphragms is exactly at the connection position of the guide beam main beam horn section 101 and the guide beam main beam first uniform cross-section section 102, and the other two are respectively on both sides; the second guide beam main beam diaphragms at other positions are spaced 2m apart.

[0032] Furthermore, a stiffening plate is connected to the outside of the position where the guide beam main beam top plate 111 and the guide beam main beam bottom plate 114 of the guide beam main beam trumpet section 101 and the guide beam main beam first uniform cross-section section 102 are connected, and the stiffening plate can further improve the structural stability of the guide beam main beam.

[0033] Furthermore, this embodiment provides a preferred horizontal connection mechanism 2, combined with Figure 5 As shown, taking the transverse connecting beam 201 as an example, the transverse connecting beam 201, the oblique connecting beam 202 and the longitudinal connecting beam 203 all include a connecting rod 211 and an oblique brace 212. Two connecting rods 211 are provided, and the oblique brace 212 is connected between them. The oblique brace 212 is connected to the connecting rod 211 in a triangular shape, that is, the oblique brace 212 is obliquely connected between the connecting rods 211, and is connected end to end in sequence. The transverse connecting mechanism 2 connects the guide beam main beam 1, so that the guide beam forms a whole, and the transverse connecting mechanism 2 adopts a triangular force structure, which increases the stability and structural strength of the transverse connecting mechanism 2, and has a simple structure and light weight, which is more suitable for application in a flat steel structure arch beam composite bridge with a small aspect ratio to reduce the load-bearing of the beam body.

[0034] Furthermore, the connecting rod 211 is made of channel steel, and the diagonal brace 212 is made of angle steel. The above materials are easy to obtain and convenient to process.

[0035] This embodiment is applied to a flat steel structure arch-beam composite bridge with a height of 1.1-1.3m and a width of 38-45m. The lengths of the guide beam main beam horn section 101, the guide beam main beam first uniform cross-section section 102, the guide beam main beam variable cross-section section 103 and the guide beam main beam second uniform cross-section section 104 are 1.5m, 7.5m, 1m and 14.5m respectively. The heights of the guide beam main beam horn section 101 and the guide beam main beam first uniform cross-section section 102 are 1.1m, and the height of the guide beam main beam second uniform cross-section section 104 is 0.7m. The lightweight guide beam of the present embodiment breaks the high, wide and large structure of the traditional truss guide beam and the variable-section I-beam steel guide beam, and uses a compact box beam as the design basis. While meeting the requirements of the same guide beam stiffness, the lightweight guide beam of the present invention can reduce the height, width and length, and is more suitable for the jacking construction of flat steel structure arch beam combination bridges with smaller web heights. At the same time, compared with traditional guide beams, it can save more than 30% of steel usage.

Claims

1. A portable guide beam for top-pushing construction of a large-span flat steel structure arch-beam composite bridge, characterized in that include: The guide beam main beam is provided with two symmetrical groups, including a guide beam main beam horn section, a guide beam main beam first uniform cross-section section, a guide beam main beam variable cross-section section and a guide beam main beam second uniform cross-section section connected in sequence, each including a guide beam main beam top plate, a guide beam main beam bottom plate, a guide beam main beam web plate and a guide beam main beam cross-section plate, the guide beam main beam horn section, the guide beam main beam first uniform cross-section section, the guide beam main beam variable cross-section section and the guide beam main beam second uniform cross-section section The guide beam main beam bottom plate is on the same plane, the guide beam main beam horn section, the guide beam main beam first uniform cross-section section and the guide beam main beam second uniform cross-section section The guide beam main beam top plate is parallel to the guide beam main beam bottom plate, and the guide beam main beam horn section and the guide beam main beam first uniform cross-section section are connected to the guide beam main beam bottom plate. The top plate of the guide beam main beam of the first uniform cross-section section is higher than the plane where the top plate of the guide beam main beam of the second uniform cross-section section of the guide beam main beam is located, the top plate of the guide beam main beam of the first uniform cross-section section of the guide beam main beam is connected with the top plate of the guide beam main beam of the second uniform cross-section section of the guide beam main beam through the top plate of the guide beam main beam of the variable cross-section section, two guide beam main beam web plates are spaced apart and connected between the top plate of the guide beam main beam and the bottom plate of the guide beam main beam along the length direction, and a plurality of guide beam main beam cross-partition plates are spaced apart and connected along the width direction, the top plate of the guide beam main beam and the bottom plate of the guide beam main beam of the horn section of the guide beam main beam are in a trapezoidal shape with a rear side length greater than a front side length, and the spacing between the rear ends of the guide beam main beam web plates of the horn section of the guide beam main beam is greater than the spacing between the front ends; A transverse connecting mechanism is arranged between the horn section of the guide beam main beam and the first uniform cross-section section of the guide beam main beam, and includes a transverse connecting beam, an oblique connecting beam and a longitudinal connecting beam. The two ends of the transverse connecting beam are respectively connected to the first uniform cross-section section of the guide beam main beam. Two oblique connecting beams are arranged, one end of which is respectively connected to the middle part of the transverse connecting beam, and the other end is respectively connected to the rear end of the horn section of the guide beam main beam of the two guide beam main beams. One end of the longitudinal connecting beam is connected to the middle part of the transverse connecting beam, and the other end extends backward for connection with the combined bridge.

2. The portable guide beam according to claim 1, characterized in that: The guide beam main beam top plate, guide beam main beam bottom plate, guide beam main beam web plate and guide beam main beam cross partition plate are all made of steel plates.

3. The portable guide beam according to claim 1 or 2, characterized in that: The spacing between the webs of the guide beam and main beam is 1 / 2-2 / 3 of the width of the top plate of the guide beam and main beam.

4. The portable guide beam according to claim 1 or 2, characterized in that: The guide beam main beam cross-plate includes a first guide beam main beam cross-plate and a second guide beam main beam cross-plate. 3-7 first guide beam main beam cross-plates are arranged at the connection position of the guide beam main beam horn section and the first equal cross-section section of the guide beam main beam, and the spacing between adjacent first guide beam main beam cross-plates is 0.2-0.4m. Second guide beam main beam cross-plates are arranged at the remaining positions, and the spacing between adjacent second guide beam main beam cross-plates is 1.2-2.5m.

5. The portable guide beam according to claim 1, characterized in that: A stiffening plate is also connected to the outer side of the position where the guide beam main beam trumpet section and the guide beam main beam first equal cross-section section are connected to the guide beam main beam top plate and the guide beam main beam bottom plate.

6. The portable guide beam according to claim 1, characterized in that: The transverse connecting beam, the oblique connecting beam and the longitudinal connecting beam all include connecting rods and oblique braces. Two connecting rods are provided, and the oblique braces are connected between them. The oblique braces are connected to the connecting rods in a triangle shape.

7. The portable guide beam according to claim 6, characterized in that: The connecting rod is made of channel steel, and the diagonal brace is made of angle steel.

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