Bridge construction method

Abstract

The invention provides a bridge construction method, which relates to the technical field of bridge construction, and comprises the following steps: respectively pouring a first bridge pier and a second bridge pier which are respectively positioned on two sides in the width direction of an operation line; a first beam body and a second beam body are poured on the tops of the first pier and the second pier respectively, the first beam body extends in the length direction of the operation line, and the second beam body extends in the width direction of the operation line; rotating the first bridge pier to enable the end parts of the first beam body and the second beam body to directly face each other; and a closure section is poured to connect the first beam body and the second beam body, and the closure section is spaced from the operation line in the height direction. The influence on an operation line during bridge construction is avoided, the operation line can operate normally, meanwhile, after pouring of the first beam body and the second beam body is completed, the first beam body and the second beam body can directly face each other only by rotating the first beam body, closure of the first beam body and the second beam body is facilitated, and the construction efficiency of the bridge is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and more specifically, to a bridge construction method. Background Technology

[0002] Bridge construction is a long-term project, often using temporary support structures in conjunction with formwork installation for concrete pouring. For example, when constructing a cantilever bridge, a large number of temporary supports need to be erected. The erection of these supports not only consumes a lot of materials and manpower, but is also cumbersome and time-consuming. In addition, if there are operating lines under the bridge, it will lead to the temporary closure of the operating lines, affecting their normal operation. Summary of the Invention

[0003] The purpose of this invention is to provide a bridge construction method to improve the aforementioned problems. To achieve this purpose, the technical solution adopted by this invention is as follows:

[0004] This application provides a bridge construction method, comprising the following operations: casting a first pier and a second pier respectively, the first pier and the second pier being located on opposite sides of the width direction of the operating line; casting a first beam and a second beam respectively on the top of the first pier and the second pier, the first beam extending along the length direction of the operating line and the second beam extending along the width direction of the operating line; rotating the first pier so that the ends of the first beam and the second beam are aligned; casting a closure section to connect the first beam and the second beam, the closure section being spaced apart from the operating line in the height direction.

[0005] According to some embodiments of the present invention, the casting of the first beam body includes: casting a first beam block, the first beam block being located at the top of the first pier; setting up hanging baskets on both sides of the first beam block along its length, and casting a second beam block through the hanging baskets; moving the hanging baskets to the second beam block, and casting the next second beam block through the hanging baskets, and repeating this process until the length dimension of the first beam body reaches a preset value, and the first beam block and multiple second beam blocks together constitute the first beam body.

[0006] According to some embodiments of the present invention, when the number of second beams on both sides of the first beam block is different and / or the weight of the second beams is different, a counterweight is applied to the side with fewer second beams and / or a smaller weight of the second beams.

[0007] According to some embodiments of the present invention, the total weight of all the second beam blocks on one side of the first beam block is m1, the total weight of all the second beam blocks on the other side of the first beam block is m2, and the applied counterweight is m3. If (m1-m2)>20t, then a counterweight is applied on the other side of the first beam block, and the following condition is met: (m1-m2-m3)≤20t.

[0008] According to some embodiments of the present invention, when the length of the first beam reaches a preset value, the hanging baskets on both sides of the first beam block are removed, and cover plates are provided on both sides of the first beam block, with the cover plates on both sides respectively connected to the second beam blocks on both sides of the first beam block.

[0009] According to some embodiments of the present invention, when shielding plates are provided on both sides of the first beam block, the applied counterweights are adjusted synchronously to ensure the bending moment balance on both sides of the first beam block.

[0010] According to some embodiments of the present invention, the process of casting the second beam includes: erecting supports on both sides of the second pier; setting templates on the supports to form a first casting space; tying a steel reinforcement cage in the first casting space; and casting concrete in the first casting space.

[0011] According to some embodiments of the present invention, when pouring concrete in the first pouring space, the concrete is slowed down to ensure that the concrete in the first pouring space is poured in one go before the first poured concrete sets.

[0012] According to some embodiments of the present invention, the casting closure section includes: installing a steel shell, wherein at least a portion of the first beam and the second beam are housed within the steel shell, and a second casting space is defined between the steel shell, the first beam, and the second beam; and casting concrete in the second casting space.

[0013] According to some embodiments of the present invention, the steel shell includes a first plate, which contacts the bottom of a first beam and a second beam, and a second plate is provided on both sides of the first plate in the width direction, with the two second plates respectively contacting the sides of the first beam and the second beam in the width direction.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention avoids affecting the operation of the railway line during bridge construction, allowing the line to operate normally. Furthermore, after the first and second beams are poured, only the first beam needs to be rotated to align them. Compared to rotating the first and second beams separately, this invention only requires rotating the first beam, simplifying the bridge construction process and improving construction efficiency.

[0016] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the bridge construction method of the present invention;

[0019] Figure 2 This is a schematic diagram of the first beam, the second beam, and the steel shell of the present invention;

[0020] Figure 3 This is a schematic diagram of the casting of the first beam in this invention;

[0021] Figure 4 This is a schematic diagram of the casting of the second beam according to the present invention.

[0022] Marked in the image:

[0023] 10. First pier; 20. Second pier;

[0024] 30. First beam body; 31. First beam block; 32. Second beam block;

[0025] 40. Second beam; 50. Hanging basket; 60. Support frame; 70. Steel shell. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] like Figures 1-4 As shown, this embodiment provides a bridge construction method, including the following operations:

[0029] S100 respectively cast the first pier 10 and the second pier 20, which are located on both sides of the width of the operating line.

[0030] In some embodiments, a first pier 10 and a second pier 20 are cast on both sides of the operating line width direction, respectively. The first pier 10 and the second pier 20 are adapted to provide a foundational support structure for the subsequent construction of the beam. The first pier 10 and the second pier 20 can be located adjacent to the operating line, or they can be located at a certain distance from the operating line, depending on the width of the operating line and the span of the bridge. The first pier 10 and the second pier 20 are located on both sides of the operating line width direction, which ensures that the construction process will not interfere with the normal use of the operating line.

[0031] It should be noted that the operating line can be an operating railway or an operating highway, etc. Of course, the operating line can also be a railway or highway under construction, etc., without any restrictions.

[0032] S200 casts a first beam 30 and a second beam 40 on the top of the first pier 10 and the second pier 20 respectively. The first beam 30 extends along the length of the operating line and the second beam 40 extends along the width of the operating line.

[0033] Specifically, a first beam 30 is cast on top of the first pier 10. The first beam 30 extends along the length of the operating line. Alternatively, the extension direction of the first beam 30 may be at a certain angle to the length of the operating line, provided that the projection of the first beam 30 in the height direction is spaced apart from the operating line after the first beam 30 is cast. This avoids affecting the operating line during the construction of the first beam 30 (concrete debris or tools may fall during the construction of the first beam 30).

[0034] A second beam 40 is cast on top of the second pier 20. The second beam 40 extends along the width of the operating line, and after its casting is completed, its projection in the height direction is spaced apart from the operating line. This ensures that the construction of the second beam 40 will not affect the operating line.

[0035] S300 rotates the first pier 10 so that the ends of the first beam 30 and the second beam 40 are aligned.

[0036] Specifically, after the first beam 30 and the second beam 40 are poured, the spatial position of the first beam 30 can be changed by rotating the first pier 10. That is, after the first beam 30 rotates with the first pier 10, the extension direction of the first beam 30 is parallel to the extension direction of the second beam 40, and at this time the ends of the first beam 30 and the second beam 40 are facing each other to facilitate the subsequent closure construction.

[0037] The S400 pouring closure section connects the first beam 30 and the second beam 40, and the closure section is spaced apart from the operating line in the height direction.

[0038] Understandably, the closure segment is poured to connect the first beam 30 and the second beam 40, and the closure segment is spaced apart from the operating line in the vertical direction. The pouring of the closure segment completes the overall connection of the bridge structure, making the first beam 30 and the second beam 40 form a complete load-bearing system.

[0039] Of course, the design of spacing the closure section from the operating line in the vertical direction avoids complex high-altitude splicing operations above the operating line, further reducing the impact on the operating line.

[0040] It is understandable that bridge construction may cross operational lines, or that there may be a construction area beneath the bridge during construction. The construction method described in this application can be used in such situations.

[0041] Specifically, during bridge construction, the first pier 10 and the second pier 20 are first poured on both sides of the operating line, respectively. Then, the first beam 30 and the second beam 40 are poured on the first pier 10 and the second pier 20, respectively. After the first beam 30 and the second beam 40 are poured, the extension direction of the first beam 30 is parallel to the extension direction of the operating line, and the extension direction of the second beam 40 is parallel to the width direction of the operating line (the second beam 40 extends from the second pier 20 to the operating line). Then, the first pier 10 is rotated so that the extension direction of the first beam 30 is parallel to the width direction of the operating line. The extension direction of the second beam 40 is parallel. At this time, the ends of the first beam 30 and the second beam 40 are directly opposite each other, and the projection of the end of the first beam 30 facing the second beam 40 in the height direction is spaced apart from the operating line. The projection of the end of the second beam 40 facing the first beam 30 in the height direction is also spaced apart from the operating line. Next, a mold is erected to form a second pouring space between the mold, the first beam 30 and the second beam 40. Finally, concrete is poured in the second pouring space. After the concrete solidifies, the first beam 30 and the second beam 40 can be connected.

[0042] Of course, when bridge construction is underway and there is a construction area below the bridge, the above-mentioned construction method can avoid affecting the construction area below the bridge, allowing the construction area below to be carried out simultaneously with the bridge construction, ensuring the overall construction rhythm and improving the overall construction efficiency.

[0043] According to the bridge construction method of the present invention, the impact on the operating line is avoided during bridge construction, allowing the operating line to operate normally. At the same time, after the first beam 30 and the second beam 40 are poured, only the first beam 30 needs to be rotated to make the first beam 30 and the second beam 40 face each other. Compared with rotating the first beam 30 and the second beam 40 separately, this application only requires rotating the first beam 30, which simplifies the bridge construction steps and improves the bridge construction efficiency.

[0044] According to some embodiments of the present invention, the casting of the first beam 30 includes the following steps:

[0045] The first beam block 31 is poured, and the first beam block 31 is located on top of the first pier 10.

[0046] Specifically, when casting the first beam 30, the first beam block 31 needs to be cast on the top of the first pier 10. The first beam block 31 is the starting part of the construction of the first beam 30. The first beam block 31 is suitable for providing basic support and connection points for the subsequent casting of the second beam block 32.

[0047] It should be noted that the prestressing tendons need to be tensioned and anchored when the first beam block 31 is poured.

[0048] Hanging baskets 50 are set on both sides of the first beam block 31 along its length, and the second beam block 32 is poured through the hanging baskets 50.

[0049] In some embodiments, hanging baskets 50 are installed on both sides of the first beam block 31 along its length, and the hanging baskets 50 are used as a construction platform and formwork support structure, thereby enabling the second beam block 32 to be cast using the hanging baskets 50.

[0050] The hanging basket 50 is moved to the second beam block 32, and the next second beam block 32 is poured through the hanging basket 50. This process is repeated until the length of the first beam body 30 reaches the preset value. The first beam block 31 and multiple second beam blocks 32 together constitute the first beam body 30.

[0051] Understandably, after the first second beam block 32 adjacent to the first beam block 31 is structurally stable, the hanging basket 50 is moved to the first second beam block 32 adjacent to the first beam block 31. Then, the construction workers can use the hanging basket 50 to pour the second second beam block 32 adjacent to the first beam block 31, and so on, until the length of the first beam 30 reaches the preset value.

[0052] It should be noted that when casting multiple second beam blocks 32, the prestressing tendons of the corresponding second beam blocks 32 need to be tensioned and anchored in sequence.

[0053] According to some embodiments of the present invention, when the number of second beam blocks 32 on both sides of the first beam block 31 is different and / or the weight of the second beam blocks 32 is different, a counterweight is applied to the side with fewer second beam blocks 32 and / or with less weight.

[0054] It is understandable that during the actual construction of the first beam 30, the length of all the second beam blocks 32 on the side of the first beam block 31 facing the second beam 40 may be different from the length of all the second beam blocks 32 on the side of the first beam block 31 away from the second beam 40.

[0055] When the lengths are different, it can be that the number of second beam blocks 32 on both sides of the first beam block 31 is the same, but the lengths of the last second beam block 32 on both sides of the first beam block 31 are different; it can also be that the number of second beam blocks 32 on both sides of the first beam block 31 is different; or it can be that the number of second beam blocks 32 on both sides of the first beam block 31 is different, and the lengths of the last second beam block 32 on both sides of the first beam block 31 are different.

[0056] It is understandable that during the casting of the first beam 30, the first pier 10 bears loads from the first beam block 31 and the second beam blocks 32 on both sides. When the number and / or weight of the second beam blocks 32 on both sides of the first beam block 31 are different, it will cause an imbalance of forces on both sides of the first pier 10, thereby generating bending moments and torques, which in turn will cause the pier to bend and deform or cause the first beam 30 to collapse during construction. This application can balance the forces on both sides of the first pier 10 by applying counterweights to the side with fewer and / or lighter second beam blocks 32, thereby avoiding excessive deformation and stress concentration of the first pier 10 due to uneven force distribution, and preventing the first beam 30 from collapsing during construction.

[0057] It is worth mentioning that the construction of the first beam 30 is a dynamic process. As the first beam 30 is continuously poured, the stress state of the structure is constantly changing. Specifically, when the second beam block 32 is poured segment by segment using the hanging basket 50, the center of gravity and stress distribution of the structure will change after each segment of the second beam block 32 is poured. Therefore, in order to ensure the structural stability during the construction process, this application applies counterweights to achieve effective dynamic adjustment. That is, the counterweights can be flexibly increased or decreased according to the pouring progress and quality of the second beam blocks 32 on both sides, ensuring that the first pier 10 of the first beam 30 is always in a relatively stable stress state throughout the entire construction process.

[0058] It should be noted that the counterweight is placed on one or two second beam blocks 32 away from the first beam block 31. This reduces the applied weight of the counterweight, thereby reducing the pressure on the first beam 30 during construction. For example, if seven second beam blocks 32 are placed on the lighter side of the first beam block 31, then the counterweight should be applied to the sixth and / or seventh second beam blocks 32.

[0059] According to some embodiments of the present invention, the total weight of all the second beam blocks 32 on one side of the first beam block 31 is m1, the total weight of all the second beam blocks 32 on the other side of the first beam block 31 is m2, and the applied counterweight is m3. If (m1-m2)>20t, then the counterweight is applied on the other side of the first beam block 31, and satisfies: (m1-m2-m3)≤20t.

[0060] In some embodiments, when the total weight difference of the second beam blocks 32 on both sides of the first beam block 31 exceeds a threshold of 20 tons, a counterweight m3 is applied to adjust the force balance on both sides of the first pier 10. Applying the counterweight m3 is equivalent to adding an additional load to the lighter side, so that the moments on both sides of the first pier 10 tend to be balanced. Of course, (m1-m2-m3)≤20t is to ensure that after the counterweight is applied, the weight difference on both sides is still within a controllable range, avoiding excessive force on the other side due to over-adjustment, thereby avoiding new problems.

[0061] Therefore, the above-described construction method can effectively prevent the first pier 10 from being damaged due to excessive or uneven stress. For example, it prevents the first pier 10 from experiencing shear failure or bending failure, ensuring that the first pier 10 remains in a safe state throughout the construction process and providing stable foundation support for the entire bridge construction.

[0062] According to some embodiments of the present invention, when the length dimension of the first beam 30 reaches a preset value, the hanging baskets 50 on both sides of the first beam block 31 are removed, and cover plates are provided on both sides of the first beam block 31. The cover plates on both sides are respectively connected to the second beam blocks 32 on both sides of the first beam block 31.

[0063] In some embodiments, during the construction phase of the first beam 30, the hanging basket 50 mainly bears the loads of the formwork and concrete, providing support for the pouring of the second beam block 32. When the length of the first beam 30 reaches the preset value, the structure of the first beam 30 itself has a certain strength and stability, and can independently bear part of the load in the subsequent construction process. At this time, the hanging basket 50 is removed, making the construction site more open and facilitating the entry of subsequent construction equipment and materials as well as the operation of construction personnel.

[0064] Of course, during the use of the bridge, the sides of the first beam 30 will be eroded by natural factors such as rain, wind and sand, and ultraviolet rays, as well as by the airflow impact generated by vehicles. The shield can play a role in shielding and protecting, reducing the damage of these factors to the first beam 30 and extending the service life of the first beam 30. At the same time, the connection between the shield and the second beam block 32 can enhance the stability of the shield and enable the shield to better perform its protective function.

[0065] It should be noted that when the length of the first beam 30 reaches the preset value, a shield is installed. The shield can protect the construction workers during construction, making them safer in subsequent construction processes.

[0066] According to some embodiments of the present invention, when shielding plates are provided on both sides of the first beam block 31, the applied counterweights are adjusted synchronously to ensure the bending moment balance on both sides of the first beam block 31.

[0067] Understandably, during bridge construction, the first beam block 31 and its related structures (including the second beam block 32, shielding plate, etc.) constitute a force-bearing system. The setting of the shielding plate will change the weight distribution and stress on both sides of the first beam block 31. At this time, by increasing or decreasing the counterweight, the total weight on one side of the first beam block 31 can be changed, thereby adjusting the moment on that side so that the bending moments on both sides of the first beam block 31 can reach a new equilibrium state, ensuring the stability and safety of the structure.

[0068] According to some embodiments of the present invention, the casting of the second beam 40 includes the following steps:

[0069] Support frames 60 are erected on both sides of the second pier 20.

[0070] Specifically, during the pouring process of the second beam 40, the concrete and steel reinforcement materials have a certain weight. The support 60 can transfer the weight of the concrete and steel reinforcement materials to the foundation to prevent the second beam 40 from collapsing during the pouring process and ensure the safety and stability of the construction process.

[0071] Of course, the erection of the support 60 provides the necessary space for subsequent formwork installation and concrete pouring. The support 60 determines the approximate outline and position of the second beam 40, enabling the formwork to be installed accurately according to the design requirements, thereby ensuring that the geometric dimensions and shape of the second beam 40 meet the design standards.

[0072] It should be noted that when erecting the support 60, it is necessary to pre-compress the support 60 to eliminate the inelastic deformation of the support 60 and the foundation, and to measure the elastic stiffness of the support 60.

[0073] A template is set on the support 60 to form the first pouring space.

[0074] In some embodiments, after the template is installed on the support 60, the space enclosed by the template is the first casting space, and the shape and size of the first casting space directly determine the external shape and internal size of the second beam 40.

[0075] It should be noted that during the concrete pouring process, the formwork can prevent concrete loss, ensure the density and strength of the concrete, and at the same time, the formwork can also prevent the concrete from directly contacting the support 60 and other objects, which facilitates the subsequent removal of the formwork and the treatment of the surface of the second beam 40.

[0076] The steel reinforcement cage is tied within the first pouring space.

[0077] Understandably, the tied and formed steel reinforcement cage has good rigidity and stability, which can maintain its shape and position during the concrete pouring process, prevent the steel reinforcement from shifting, ensure the uniform distribution of the steel reinforcement in the concrete, and thus ensure the stress performance of the second beam 40.

[0078] Concrete is poured in place within the first pouring space.

[0079] Understandably, when concrete is poured into the first pouring space, it fills the gaps between the steel reinforcement cage and the entire first pouring space enclosed by the formwork, so that the steel reinforcement and concrete are tightly bonded together to form a second beam 40 with sufficient load-bearing capacity.

[0080] Of course, when pouring concrete in the first pouring space, air bubbles in the concrete can be removed through construction techniques such as vibration to improve the density of the concrete and ensure the quality of the second beam 40.

[0081] It should be noted that prestressing tensioning is carried out when the concrete strength and elastic modulus both reach 100% of the design value. The web steel strands are tensioned first, followed by the top and bottom slab strands. Then, the side shields and railings (sound barriers) are installed. Next, the support 60 is removed. The support 60 is removed sequentially from the mid-span and side support points toward the second pier 20.

[0082] According to some embodiments of the present invention, the concrete is slowed down during the on-site pouring of concrete in the first pouring space so as to ensure that the concrete in the first pouring space is poured in one go before the initial setting of the first poured concrete.

[0083] Understandably, the above setup ensures that the concrete is poured in one go before the initial setting of the first batch, effectively preventing cold joints between different batches of concrete. This avoids weakening the overall integrity of the second beam 40 caused by cold joints, thereby preventing a reduction in the shear and tensile mechanical properties of the second beam 40 and improving its structural strength and durability.

[0084] Of course, one-time pouring can ensure that the concrete in the first pouring space is more uniform in terms of material distribution and density, and avoid the possible differences in mix proportion and mixing quality between different batches of concrete, thereby avoiding unevenness inside the second beam 40 and improving the load-bearing performance of the second beam 40.

[0085] It should be noted that when pouring concrete in the first pouring space, the concrete can be slowed down by adding a coagulant or other means, and there are no restrictions on this.

[0086] In some embodiments,

[0087] According to some embodiments of the present invention, casting the closure segment includes the following steps:

[0088] The steel shell 70 is installed, and at least a portion of the first beam 30 and the second beam 40 are housed within the steel shell 70, defining a second casting space between the steel shell 70, the first beam 30, and the second beam 40.

[0089] Specifically, the steel shell 70 is constructed as the aforementioned mold, connecting the steel shell 70 to the first beam 30 and the second beam 40, thereby forming a second pouring space between the steel shell 70, the first beam 30, and the second beam 40. The second pouring space is used for cast-in-place concrete.

[0090] Concrete is poured in place in the second pouring space.

[0091] It is understandable that concrete is poured in place in the second pouring space. After the concrete solidifies, the first beam 30 and the second beam 40 can be connected and fixed, so that the first beam 30 and the second beam 40 form a whole, thereby ensuring the continuity of the bridge.

[0092] It should be noted that the projection of the steel shell 70 in the height direction is spaced apart from the operating line, which can avoid affecting the operating line when pouring the closure section.

[0093] It is worth mentioning that during the pouring of the closure section, the longitudinal prestressing tendons of the bottom slab were first tensioned and anchored, followed by the installation of temporary rigid connections and water tanks for the closure section, and then the longitudinal steel tendons of the top slab of the closure section were pre-tensioned. Specifically, during the pouring, plain concrete was first poured for weighting the large-mileage side spans, and then the cast-in-place closure section was encased in a 70mm steel shell. The water tank was emptied while pouring, and after the pouring was completed, the remaining longitudinal prestressing tendons of the top and bottom slabs were tensioned and anchored.

[0094] It should be noted that after the closure section is poured, the steel shell 70 and the temporary rigid connection are removed, the counterweight is removed, and finally the bridge deck is laid.

[0095] According to some embodiments of the present invention, the steel shell 70 includes a first plate body. The first plate body is in contact with the bottoms of the first beam body 30 and the second beam body 40. Second plate bodies are provided on both sides of the first plate body in the width direction, and the two second plate bodies are respectively in contact with both sides of the first beam body 30 and the second beam body 40 in the width direction.

[0096] It can be understood that, compared with the traditional scheme of erecting support frames and molds, by arranging the above-mentioned steel shell 70 in this application, the occupation of the space below the bridge during the pouring of the closure segment can be reduced, thereby further avoiding the impact on the operating line or construction area below.

[0097] It is worth mentioning that the first plate body and the two second plate bodies form a steel shell 70 similar to a "匚" shape. Compared with the traditional mold, the steel shell 70 occupies less space below the bridge, realizes the protection of the bridge structure under complex transportation conditions, and realizes the precise installation under low clearance and small limit environment. It reduces the construction safety risk of the closure segment and expands the construction feasibility under special working conditions.

[0098] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0099] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or replacements, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A bridge construction method, characterized in that, Includes the following operations: The first pier (10) and the second pier (20) are poured respectively, and the first pier (10) and the second pier (20) are located on both sides of the width direction of the operating line. A first beam (30) and a second beam (40) are cast on the top of the first pier (10) and the second pier (20), respectively. The first beam (30) extends along the length of the operating line, and the second beam (40) extends along the width of the operating line. Rotate the first pier (10) so that the ends of the first beam (30) and the second beam (40) are aligned; The closure section is poured to connect the first beam (30) and the second beam (40), and the closure section is spaced apart from the operating line in the height direction.

2. The bridge construction method according to claim 1, characterized in that, The pouring of the first beam (30) includes: The first beam block (31) is poured, and the first beam block (31) is located on top of the first pier (10); Hanging baskets (50) are respectively set on both sides of the first beam block (31) along its length, and the second beam block (32) is cast through the hanging baskets (50); The hanging basket (50) is moved to the second beam block (32), and the next second beam block (32) is poured through the hanging basket (50). This process is repeated until the length of the first beam body (30) reaches the preset value. The first beam block (31) and multiple second beam blocks (32) together constitute the first beam body (30).

3. The bridge construction method according to claim 2, characterized in that, When the number of second beam blocks (32) on both sides of the first beam block (31) is different and / or the weight of the second beam blocks (32) is different, a counterweight is applied to the side with fewer second beam blocks (32) and / or with less weight.

4. The bridge construction method according to claim 3, characterized in that, The total weight of all the second beam blocks (32) on one side of the first beam block (31) is m1, the total weight of all the second beam blocks (32) on the other side of the first beam block (31) is m2, and the applied counterweight is m3. If (m1-m2)>20t, then the counterweight is applied on the other side of the first beam block (31), and the following condition is met: (m1-m2-m3)≤20t.

5. The bridge construction method according to claim 4, characterized in that, When the length of the first beam (30) reaches the preset value, the hanging baskets (50) on both sides of the first beam block (31) are removed, and a cover plate is set on both sides of the first beam block (31). The cover plates on both sides are respectively connected to the second beam blocks (32) on both sides of the first beam block (31).

6. The bridge construction method according to claim 5, characterized in that, When shielding plates are installed on both sides of the first beam block (31), the applied counterweights are adjusted synchronously to ensure that the bending moments on both sides of the first beam block (31) are balanced.

7. The bridge construction method according to claim 1, characterized in that, The casting of the second beam (40) includes: Scaffolding (60) is erected on both sides of the second pier (20); A template is set on the support (60) to form the first pouring space; Tie the steel reinforcement cage within the first pouring space; Concrete is poured in place within the first pouring space.

8. The bridge construction method according to claim 7, characterized in that, When pouring concrete in the first pouring space, the concrete is slowed down to ensure that the concrete in the first pouring space is poured in one go before the first poured concrete sets.

9. The bridge construction method according to claim 1, characterized in that, The closure section to be poured includes: A steel shell (70) is installed, and at least a portion of the first beam (30) and the second beam (40) are housed within the steel shell (70), and a second casting space is defined between the steel shell (70), the first beam (30) and the second beam (40). Concrete is poured in place within the second pouring space.

10. The bridge construction method according to claim 9, characterized in that, The steel shell (70) includes a first plate, which contacts the bottom of the first beam (30) and the second beam (40). A second plate is provided on both sides of the first plate in the width direction, and the two second plates respectively contact the sides of the first beam (30) and the second beam (40) in the width direction.

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