Main bridge drainage structure and drainage method

Abstract

This application relates to the field of bridge drainage technology, and more particularly to a main bridge drainage structure and method, comprising a drainage pipe disposed under the bridge deck beam and multiple downpipes pre-installed on the bridge deck beam. Each downpipe includes an inlet section and a drainage section connected to the drainage pipe. The inlet section is pre-installed on the upper part of the bridge deck beam, and an installation assembly is provided between the inlet section and the drainage section. The installation assembly includes a flexible installation hose and a resilient installation tube pre-installed inside the bridge deck beam. One end of the flexible installation hose is connected to the inlet section, and the other end is connected to the drainage section. The resilient installation tube is sleeved on the flexible installation hose and the drainage section and provides radial displacement allowance for the drainage section. This application enables relatively precise alignment and installation of the drainage pipe with the downpipes.

Description

Technical Field

[0001] This application relates to the field of bridge drainage technology, and in particular to a drainage structure and drainage method for a main bridge. Background Technology

[0002] A bridge is a structure erected in road transportation to facilitate passage across mountains, streams, adverse geological conditions, or to meet other traffic needs. It mainly consists of a superstructure, substructure, supports, and ancillary structures. The superstructure primarily refers to the bridge span structure, that is, the bridge deck beams that form the bridge surface. In current bridge construction, bridge deck beams are mainly classified into three types: concrete structures, steel structures, and reinforced concrete structures, but the main body of the bridge deck beams remains a concrete structure. Therefore, during construction, a drainage system needs to be built on the bridge deck beams to promptly drain rainwater and prevent water accumulation on the bridge surface.

[0003] The bridge's drainage system mainly consists of multiple downpipes embedded in the bridge deck beams that guide rainwater from the bridge deck to below the bridge deck. The rainwater is then collected by drainage pipes located below the sides of the bridge deck beams and finally discharged.

[0004] During construction, it is often necessary to pre-install downpipes that run through the bridge deck beams inside the beams to facilitate later construction. After the bridge deck beams, substructure, and supports are completed, drainage pipes are simply installed under the bridge deck beams, and multiple downpipes are connected to the drainage pipes during the installation process.

[0005] In urban bridge design, drainage holes are typically located near the crossbeams atop the piers. Downpipes are then routed through the bridge deck beams, bottom slabs, and pier sections to the surface drainage system. During the pre-installation of downpipes, they must first be fixed to the internal steel reinforcement structure of the bridge deck beam before its main concrete structure is poured. However, the compaction of the concrete during pouring exerts pressure on the downpipes, easily causing misalignment. This results in multiple downpipes not being able to be aligned collinearly during installation, leading to some downpipes being misaligned with the drainage pipes and delaying the construction of the bridge drainage system. Therefore, ensuring precise alignment between downpipes and drainage pipes is a pressing issue that needs to be addressed. Summary of the Invention

[0006] In order to ensure that the downpipes and drainage pipes on the bridge can be accurately aligned, this application provides a main bridge drainage structure and drainage method.

[0007] In the first aspect, this application provides a main bridge drainage structure, which adopts the following technical solution:

[0008] A main bridge drainage structure and drainage method include a drainage pipe disposed below the bridge deck beam and multiple downpipes pre-installed on the bridge deck beam. Each downpipe includes an inlet section and a drainage section connected to the drainage pipe. The inlet section is pre-installed on the upper part of the bridge deck beam, and an installation assembly is provided between the inlet section and the drainage section. The installation assembly includes a flexible installation hose and a flexible installation tube pre-installed inside the bridge deck beam. One end of the flexible installation hose is connected to the inlet section, and the other end of the flexible installation hose is connected to the drainage section. The flexible installation tube is sleeved on the flexible installation hose and the drainage section and is used to provide radial displacement allowance for the drainage section.

[0009] By adopting the above technical solution, if there is a misalignment between the downpipe and the drainage pipe during the installation of the drainage pipe, due to the separating effect of the installed elastic tube, the drainage part only needs to squeeze the installed elastic tube so that the drainage part can still have a certain amount of radial movement after the bridge deck beam is cured, thereby allowing the drainage part to be aligned with the drainage pipe relatively accurately. At the same time, during the displacement of the drainage part, since the drainage part is connected to the water inlet through the installed flexible hose, the water inlet and drainage parts can be staggered to reduce the interference of the water inlet on the positional change of the drainage part.

[0010] Optionally, the mounting elastic tube is provided with a support member for supporting the structure.

[0011] By adopting the above technical solution, the installed elastic tube can be supported, reducing the possibility of deformation of the installed elastic tube due to the pressure of concrete during the pouring of the bridge deck beam.

[0012] Optionally, the support member is tubular and sleeved on the installation elastic tube and the installation hose, and the end of the support member corresponding to the installation hose is threaded to the water inlet.

[0013] By adopting the above technical solution, the support can simultaneously isolate the installation elastic tube and the installation hose from the concrete inside the bridge deck beam, and provide support through the support to reduce the possibility of deformation of the installation elastic tube and the installation hose due to concrete pouring.

[0014] Optionally, the inner wall of the mounting elastic tube is provided with a plurality of clearance holes distributed along the axis, the extension path of the clearance holes being annular and arranged around the central axis of the mounting elastic tube.

[0015] By adopting the above technical solution, the clearance hole can further increase the deformation of the installed elastic tube, so as to further optimize the alignment accuracy of the drainage section with the drainage pipe after the drainage section deviates.

[0016] Optionally, the inner cavity of the clearance hole is filled with a flowable filler.

[0017] By adopting the above technical solution, the filler can fill the clearance hole, and during the process of squeezing the installation elastic tube in the drainage section, the flow of the filler keeps the installation elastic tube in contact with the drainage section, reducing the possibility of gaps appearing between the installation elastic tube and the drainage section due to squeezing.

[0018] Optionally, the filler is an expanding curing adhesive, and the mounting elastic tube has a connecting hole that connects multiple clearance holes, and one end of the connecting hole is connected to the outside and is provided with a sealing element for sealing.

[0019] By adopting the above technical solution, after the drain pipe is connected to the drain section, it is only necessary to open the sealing part to allow the filler to come into contact with the outside air and moisture, and expand and solidify, so that the installed elastic pipe can be in relatively tight contact with the drain section.

[0020] Optionally, the sealing component includes a sealing block made of a permeable material and a sealing rod abutting against the sealing block. The sealing block is fixedly connected to the inner wall of the connecting hole, and the sealing rod is located on the side of the sealing block away from the clearance hole. The sealing rod is threadedly connected to the inner wall of the connecting hole, and the sealing rod is used to seal the connecting hole.

[0021] By adopting the above technical solution, after the drainage part and the drainage pipe are connected and aligned, it is only necessary to detach the sealing rod and then make the sealing block restrict the outflow of the filler. During this process, external moisture can come into contact with the filler, causing the filler to solidify and take shape, thereby also restricting the displacement of the drainage part after installation.

[0022] Optionally, the installation hose is sleeved around the opening edge of the water inlet, the outer wall of the end of the water inlet connected to the installation hose has a conical structure, and the small end of the water inlet faces the drain, with the installation hose fitting against the conical outer wall of the water inlet.

[0023] By adopting the above technical solution, the installation hose can be gradually expanded during the process of installing the hose on the water inlet to optimize the sealing performance, and the support components can be used to keep the installation hose in contact with the water inlet, reducing the possibility of mud and water seeping in during the pouring of the bridge deck beam.

[0024] Optionally, the coefficient of thermal expansion of the water inlet is greater than that of the installation hose, and the portion of the installation hose that is outer sleeve of the water inlet is provided with an expansion hole. The expansion hole is annular and arranged around the central axis of the installation hose, and the expansion hole is filled with an expansion ring made of a material that expands when heated.

[0025] By adopting the above technical solution, a large amount of heat will be released during the concrete curing process. At this time, the expansion ring in the expansion hole will expand due to the heat, and the opening edge of the installation hose will fit against the inner wall of the support and the outer wall of the water inlet.

[0026] Secondly, this application provides a main bridge drainage method, which adopts the following technical solution:

[0027] A drainage method for a main bridge, which utilizes a main bridge drainage structure.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] When installing drainage pipes, if there is misalignment between the downpipe and the drainage pipe, the flexible pipe can be installed to separate the drainage section by squeezing the flexible pipe. This allows the drainage section to have a certain amount of radial movement after the bridge deck beam has solidified, enabling it to be aligned with the drainage pipe relatively accurately. At the same time, during the displacement of the drainage section, the flexible pipe connects it to the inlet section, allowing the inlet and drainage sections to be staggered, thus reducing the interference of the inlet section on the positional changes of the drainage section. Attached Figure Description

[0030] Figure 1 This is a top view of Embodiment 1 of this application.

[0031] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along line AA in the middle.

[0032] Figure 3 yes Figure 2 A magnified structural diagram of part B.

[0033] Figure 4 This is a cross-sectional view of the installation of the elastic tube in Embodiment 1 of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Bridge deck beam; 2. Drainage pipe; 3. Downpipe; 31. Water inlet; 311. Rain grate; 32. Drainage section; 4. Installation component; 41. Installation hose; 411. Expansion hole; 412. Expansion ring; 42. Installation elastic tube; 421. Clearance hole; 422. Connection hole; 43. Support component; 44. Sealing component; 441. Sealing block; 442. Sealing rod. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0036] Example 1

[0037] This application discloses a main bridge drainage structure. (Refer to...) Figure 1 and Figure 2The main bridge drainage structure includes a drainage pipe 2 installed under the bridge deck beam 1 and multiple downpipes 3 pre-installed on the bridge deck beam 1. The multiple downpipes 3 are divided into at least two groups along the width direction of the bridge deck beam 1, and the multiple downpipes 3 in the same group are distributed along the length direction of the bridge deck beam 1. The bridge deck beam 1 is a reinforced concrete structure.

[0038] Reference Figure 2 and Figure 3 Specifically, the downpipe 3 includes a tubular inlet 31 and a drain 32. The inlet 31 is pre-installed at the top of the bridge deck corresponding to the bridge surface of the bridge beam 1 to guide rainwater from the bridge surface. The drain 32 is pre-installed at the bottom of the bridge deck 1, and its bottom is connected to the drain pipe 2. An installation assembly 4 is provided between the inlet 31 and the drain 32 to guide the rainwater introduced by the inlet 31 into the drain 32 and then to the drain pipe 2 for discharge.

[0039] Reference Figure 2 and Figure 3 The mounting assembly 4 includes a mounting hose 41 and a mounting flexible tube 42. One end of the mounting hose 41 is sleeved and connected to the lower end of the water inlet 31, and the other end of the mounting hose 41 is sleeved and connected to the top of the drain section 32. The mounting flexible tube 42 is sleeved on the drain section 32 and the mounting hose 41, so that the elastic deformation of the wall of the mounting flexible tube 42 provides a margin for radial displacement of the drain section 32. The end of the water inlet 31 away from the mounting hose 41 has a funnel-shaped structure and is covered with a rain grate 311, which is used for initial screening of rainwater and relatively conveniently guides rainwater in. At the same time, the lower part of the drain section 32 extends out of the mounting flexible tube 42 to facilitate connection to the drain pipe 2.

[0040] If the drainage section 32 is misaligned due to the pressure during the concrete curing and compaction process when installing the drainage pipe 2, the elastic tube 42 can be installed by squeezing the drainage section 32. This allows the drainage section 32 to move radially and makes the multiple drainage sections 32 in the same group more closely aligned in a straight line, thus achieving relatively precise alignment with the drainage pipe. During the displacement of the drainage section 32, a flexible hose 41 can be installed to achieve a transition connection between the water inlet section 31 and the drainage section 32. The elastic tube 42 is also installed to isolate the external concrete, preventing the flexible hose 41 from solidifying during the concrete pouring process of the bridge deck beam 1.

[0041] Reference Figure 2 and Figure 3 Meanwhile, in order to reduce the possibility of deformation of the installation elastic tube 42 and installation hose 41 due to the pressure of concrete during the casting of the bridge deck beam 1, the installation elastic tube 42 is provided with a support member 43 for supporting the installation, so as to reduce the possibility of deformation of the installation elastic tube 42 due to the pressure of concrete during the casting of the bridge deck beam 1.

[0042] Specifically, the support member 43 has a tubular structure and is sleeved on the installation hose 41 and the installation elastic tube 42. The end of the support member 43 facing the water inlet 31 is threaded to the water inlet 31. The inner wall of the support member 43 is in contact with the outer wall of the installation hose 41 and the installation elastic tube 42. This allows the support member 43 to play an isolation role. During the pouring of the bridge deck beam 1, it is only necessary to fix the water inlet 31 and the support member 43 to the steel reinforcement structure inside the bridge deck beam 1 respectively. It can also play a certain sealing role to reduce the possibility of external concrete seeping into the space between the installation hose 41 and the water inlet 31 during the pouring of the bridge deck beam 1, causing corrosion to the steel reinforcement inside the bridge deck beam 1.

[0043] Reference Figure 2 and Figure 3 The outer wall of the water inlet 31 connected to the installation hose 41 has a tapered tube structure with the small end facing the drainage part 32, so that the installation hose 41 fits against the tapered tube outer wall of the water inlet 31. As the support member 43 is threadedly connected to the water inlet 31, it will gradually squeeze the part of the installation hose 41 located between the support member 43 and the water inlet 31, so as to optimize the sealing effect and reduce the impact of leakage on the sealing performance during the pouring of the bridge deck beam 1.

[0044] Meanwhile, since the bridge deck beam 1 requires concrete to be cast in conjunction with a reinforcing cage and steel structure, or directly poured into shape, the concrete curing process involves a hydration reaction that generates relatively large amounts of heat, with the core temperature reaching 70-80℃. This causes the support member 43 to expand thermally, while the installation hose 41 and installation elastic tube 42, due to the isolation provided by the support member 43, experience relatively smaller thermal expansion, potentially leading to leakage. Therefore, the coefficient of thermal expansion of the water inlet 31 is made greater than that of the installation hose 41, so that the installation hose 41 can be expanded synchronously during the concrete curing process, reducing the possibility of leakage. Furthermore, an expansion hole 411 is provided on the portion of the installation hose 41 that is outer sleeved over the water inlet 31. The expansion hole 411 extends in a ring shape and is aligned with the central axis of the installation hose 41. The expansion hole 411 is filled with an expansion ring 412 made of a material that expands with heat, and the coefficient of thermal expansion of the expansion ring 412 is greater than that of the water inlet 31. Examples of such materials include a shape memory metal ring spirally arranged along the ring path and expanded graphite with an expansion temperature of less than 80℃. This allows the expansion ring 412 to expand during the pouring of the bridge deck beam 1, enabling the installation hose 41 to fully fill the gap between the support member 43 and the water inlet 31, thereby reducing the impact of water from the concrete carrying concrete additives into the seal due to heat.

[0045] Reference Figure 2 and Figure 3Furthermore, to further optimize the movement allowance of the installation elastic tube 42 during the displacement of the drainage section 32, multiple axially distributed clearance holes 421 are provided on the inner wall of the installation elastic tube 42. The extension path of the clearance holes 421 is annular and arranged on the same central axis as the installation elastic tube 42. Simultaneously, the clearance holes 421 are filled with a flowable filler, which can be mortar injected after the drainage pipe 2 is installed or an expansion-curing adhesive pre-filled in the clearance holes 421. Preferably, in this embodiment, an expansion-curing adhesive that cures upon contact with water is used.

[0046] Reference Figure 3 and Figure 4 The wall of the elastic tube 42 is provided with a connecting hole 422 that connects to multiple clearance holes 421. The connecting hole 422 extends along the axial direction of the elastic tube 42, and the upper end of the connecting hole 422 is connected to the clearance hole 421 at the top. The lower end of the connecting hole 422 is connected to the outside of the elastic tube 42 and is provided with a sealing member 44 for sealing the connecting hole 422. This allows the inner wall of the elastic tube 42 inside the clearance hole 421 to be eccentrically displaced relative to the outer wall during the installation of the drain pipe 2, through the flow of the filler, and effectively increases the displacement margin. At the same time, after the drain pipe 2 is installed, the connecting hole 422 is connected to the outside by the sealing member 44, which allows the expansion curing adhesive to expand and cure. This allows the inner wall of the elastic tube 42 to fit relatively tightly against the drain part 32, while also providing relatively stable positioning of the drain part 32. This achieves precise alignment and reduces the impact on stability during use.

[0047] Reference Figure 3 and Figure 4 The sealing component 44 includes a sealing block 441 made of permeable material and a sealing rod 442 abutting against the sealing block 441. Both the sealing block 441 and the sealing rod 442 are inserted into the opening edge of the connection hole 422 to restrict the outflow of the filler. The sealing block 441 is fixedly connected to the inner wall of the connection hole 422. The sealing rod 442 is located at the end of the sealing block 441 away from the water inlet 31, and the sealing rod 442 is inserted into and threadedly connected to the inner wall of the connection hole 422 to seal the connection hole 422. After the drain pipe 2 is installed, the sealing rod 442 can be removed from the connection hole 422 to allow external air and moisture to come into contact with the filler, causing the filler to solidify.

[0048] Of course, in other embodiments, the sealing member 44 includes a sealing rod 442 and several permeable membranes fixedly connected to the inner wall of the connection hole 422. The permeable membranes seal the connection hole 422 to restrict the filling material from contacting external moisture. After the drain pipe 2 is installed, the sealing rod 442 is removed, so that external moisture can contact the filling material through the permeable membrane and cause the filling material to solidify.

[0049] The implementation principle of Example 1 is as follows: When installing the drain pipe 2, the elastic tube 42 can be installed by squeezing the drain part 32, and the filling material in the clearance hole 421 can flow and deform simultaneously, so that the drain part 32 can be aligned with the drain pipe 2 relatively accurately. After the drain pipe 2 and the drain part 32 are installed, the external moisture comes into contact with the filling material through the sealing part 44, causing the filling material in the clearance hole 421 to expand and solidify, thereby fixing the drain part 32 relatively tightly to reduce the impact on the installation stability of the drain pipe 2.

[0050] Example 2

[0051] This application also discloses a main bridge drainage method. The drainage method utilizes the aforementioned main bridge drainage structure.

[0052] Specifically, when rainwater accumulates on the bridge deck beam 1, the rainwater is successively introduced into the installation hose 41, drainage section 32 and drainage pipe 2 through the water inlet 31, and then discharged through the drainage pipe 2.

[0053] During this process, the slight elastic deformation of the installed elastic tube 42 can provide a certain buffering effect on the drainage pipe 2 when rainwater falls into the drainage pipe 2 and causes impact, thereby optimizing the stability of the drainage pipe 2 after installation.

[0054] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A main bridge drainage structure, comprising a drainage pipe (2) disposed below a bridge deck beam (1) and a plurality of downpipes (3) pre-installed on the bridge deck beam (1), characterized in that: The downpipe (3) includes an inlet (31) and a drain (32) connected to the drain pipe (2). The inlet (31) is pre-installed on the upper part of the bridge deck beam (1), and an installation component (4) is provided between the inlet (31) and the drain (32). The mounting assembly (4) includes a mounting hose (41) and a mounting elastic tube (42) pre-installed inside the bridge deck beam (1). One end of the mounting hose (41) is connected to the water inlet (31), and the other end of the mounting hose (41) is connected to the drainage section (32). The mounting elastic tube (42) is sleeved on the mounting hose (41) and the drainage section (32) and is used to provide a radial displacement margin for the drainage section (32). The installation elastic tube (42) is provided with a support member (43) for supporting the structure. The support member (43) is tubular and is sleeved on the installation elastic tube (42) and the installation hose (41), and the end of the support member (43) is threaded to the water inlet (31) corresponding to the end of the installation hose (41). The installation hose (41) is sleeved around the opening edge of the water inlet (31). The outer wall of the end of the water inlet (31) connected to the installation hose (41) is a conical structure, and the small end of the water inlet (31) faces the drain (32). The installation hose (41) fits against the conical outer wall of the water inlet (31). The coefficient of thermal expansion of the water inlet (31) is greater than that of the installation hose (41), and the portion of the installation hose (41) that is outer sleeve of the water inlet (31) is provided with an expansion hole (411). The expansion hole (411) is annular and is arranged around the central axis of the installation hose (41), and the expansion hole (411) is filled with an expansion ring (412) made of a material that expands with heat. The inner wall of the installation elastic tube (42) is provided with a plurality of clearance holes (421) distributed along the axis. The extension path of the clearance holes (421) is annular and is arranged around the central axis of the installation elastic tube (42). The inner cavity of the clearance hole (421) is filled with a flowable filler. The filler is an expanding curing adhesive, and the installation elastic tube (42) is provided with a connecting hole (422) that connects multiple clearance holes (421), and one end of the connecting hole (422) is connected to the outside and is provided with a sealing element (44) for sealing. The sealing component (44) includes a sealing block (441) made of permeable material and a sealing rod (442) abutting against the sealing block (441). The sealing block (441) is fixedly connected to the inner wall of the connecting hole (422). The sealing rod (442) is located on the side of the sealing block (441) away from the avoidance hole (421) and the sealing rod (442) is threaded to the inner wall of the connecting hole (422). The sealing rod (442) is used to seal the connecting hole (422).

2. A method for draining a main bridge, characterized in that: The application includes the main bridge drainage structure as described in claim 1.

Images