Bridge deck pavement edge ditch drainage system

Abstract

The utility model discloses a bridge deck pavement edge ditch drainage system which comprises an open drainage ditch, a cement mortar cushion layer, a novel water collection opening, a novel water drainage pipe, a longitudinal drainage pipe, a hanging bracket and a drainage grounding pipe. A drainage open trench is arranged on one side, with lower elevation, of the bridge floor of the bridge and close to an anti-collision fence of a bridge floor pavement layer; the open drain is arranged on the cement mortar cushion layer; the novel water collecting openings are formed in the edge of the bridge at set intervals. The open drain is communicated with the novel water collecting port; a novel water drain pipe is connected below the novel water collecting port; a plurality of novel water drainage pipes of each bridge are connected in series through a longitudinal water drainage pipe, and the longitudinal water drainage pipe is arranged on the lower portion of a bridge boundary beam through a hanging bracket and connected with a water drainage grounding pipe fixed to a bridge pier or a bridge abutment. According to the utility model, the problem that water accumulation on the bridge floor cannot be avoided due to the absence of water storage facilities at the edge of the bridge floor is well solved, and the water storage capacity of the edge of the bridge floor is improved, so that rainwater can be collected and discharged in a centralized manner through the open drain.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge engineering drainage system technical field, concretely relates to a bridge deck pavement edge ditch drainage system. BACKGROUND

[0002] At present, the bridge deck drainage of bridge engineering mainly includes four components: bridge deck cross slope (super-elevation), asphalt concrete lower layer edge broken stone blind ditch, water collecting port and drain pipe.

[0003] The main function of bridge deck cross slope (super-elevation) is to provide hydraulic slope for bridge deck rainwater, so that rainwater flows to the edge of bridge, and then flows to water collecting port along the longitudinal slope direction, the distance between water collecting ports is generally 5m, and the bottom of concave curve of route is encrypted to 3m, rainwater is drained to the bridge underdrain along the drain pipe and longitudinal pipe. The main function of asphalt concrete lower layer edge broken stone blind ditch is to collect seepage water inside asphalt concrete surface layer and flow to water collecting port along the longitudinal slope direction.

[0004] However, in engineering practice, the bridge deck of bridge is basically a plane, and the two sides are mostly cement concrete guardrails, rainwater can flow along the bridge deck cross slope and longitudinal slope (bridge deck cross slope i, longitudinal slope j, refer to Figures 1 to 5 ), but still accumulates at the joint of the side with lower elevation of bridge deck and the crash barrier, and bridge deck water problem inevitably exists. Especially in heavy rainfall season, the water collecting capacity of water collecting port is limited, and rainwater cannot be drained in time by drain pipe, so the bridge deck water problem is more serious. Moreover, when the length of bridge is longer, the bridge deck water collecting capacity is larger, and the water accumulation is large; when the bridge is located at the super-elevation gradual change section or the bottom of concave curve of route, the hydraulic slope of bridge deck is insufficient, and water accumulation is easily generated, forming driving safety hazard. The following problems exist in the drainage according to the traditional bridge deck drainage system:

[0005] (1) There is no water storage facility at the edge of bridge deck, and bridge deck water cannot be avoided. The current bridge deck drainage mode is bridge deck flow, although rainwater can flow along the longitudinal and cross slope directions, but there is no water ditch, water well and other water storage facilities, the area of water collecting port is small, and the water storage capacity is limited, therefore, the current most bridges have bridge deck water problem in rainy season.

[0006] (2) Many water collecting ports are set, drain pipe penetrates the edge beam flange plate, and the structure design needs to be strengthened. The current water collecting port is set at an interval of about 5m, the setting density is large, the edge beam flange plate needs to be set with more reinforcing steel bars, and the landscape effect of bridge is affected.

[0007] (3) Gravel blind drains do not significantly improve bridge deck drainage, are difficult to construct, have limited applicability to different bridge deck pavement structures, and are prone to asphalt concrete edge chipping. Currently, when using asphalt concrete bridge deck pavement, a 15cm wide gravel blind drain is installed at the edge of the lower layer. The blind drain is located below the bridge deck and does not accumulate rainwater, thus providing little to no improvement in bridge deck drainage. During the construction of gravel blind drains, 150mm×60mm square timber, red bricks, and plain concrete are temporarily placed at the edge of the bridge deck. Then, the lower layer of asphalt concrete is laid, followed by the removal of the square timber, red bricks, and plain concrete, and finally, gravel is laid. This construction process is complex, involves many temporary facilities, and is quite difficult to construct. Gravel blind drains are only suitable for bridge deck pavement with two or more layers of asphalt concrete. They cannot be constructed when using single-layer asphalt concrete pavement or cement concrete pavement. Gravel drains are not completely dense structures and are generally difficult to compact. The lower layer of asphalt concrete is directly connected to the gravel drain, making the edges of the lower layer basically free. When the upper layer is constructed, compacted, or when vehicles drive over it, edge chipping occurs.

[0008] The aforementioned traditional bridge deck drainage systems lack water storage facilities, making it impossible to prevent water accumulation on the bridge surface, which has a certain impact on the bridge structure. Crushed stone blind drains are difficult to construct, have limited effectiveness, and are not widely applicable, creating a conflict with the requirements of numerous bridges and large drainage volumes in highways and urban roads, resulting in significant design challenges. To address these issues, a bridge deck pavement edge drainage system is proposed. Utility Model Content

[0009] To address the aforementioned problems in the prior art, this utility model provides a bridge deck pavement edge drainage system. This system, by setting up drainage ditches and other facilities at the edge of the bridge deck, can accumulate some rainwater on the bridge deck and discharge rainwater in a centralized manner, thus effectively solving the common problem of bridge water accumulation.

[0010] The present invention adopts the following technical solution:

[0011] A bridge deck pavement edge drainage system includes an open drainage ditch, a cement mortar bedding layer, a novel water collection inlet, a novel drainage pipe, a longitudinal drainage pipe, a hanger, and a drainage grounding pipe. The open drainage ditch is installed on the side of the bridge deck with the lower elevation, where the pavement layer is close to the crash barrier. The open drainage ditch is located on the cement mortar bedding layer. The novel water collection inlet is located at predetermined intervals along the bridge edge. The open drainage ditch is connected to the novel water collection inlet. The novel drainage pipe is connected to the novel water collection inlet. Several novel drainage pipes in each span of the bridge are connected in series through the longitudinal drainage pipe, which is suspended under the bridge side beam by the hanger and connected to the drainage grounding pipe fixed at the pier or abutment.

[0012] Further, the gutter is a channel steel, the channel steel is provided with an anti-rust layer, and the anti-rust layer is coated with asphalt.

[0013] Further, the cement mortar cushion is a rigid cement mortar cushion, and the rigid cement mortar cushion has a thickness of 25-35 mm.

[0014] Further, one side of the new water collecting head is flush with the top surface of the bridge deck pavement, at least one side of the new water collecting head is provided with an access notch for the installation of the gutter, and the middle part of the new water collecting head in the top view is provided with a position notch for the installation of the water discharge pipe.

[0015] Further, one end of the new water discharge pipe is communicated with the new water collecting head through a water discharge pipe opening, and the other end of the new water discharge pipe is connected with the longitudinal water discharge pipe through a tee pipe.

[0016] Further, the water discharge pipe opening is provided with a plurality of water discharge holes in the side wall, and the water discharge pipe opening is further provided with a grating cover, and the grating cover is also provided with a plurality of water discharge holes.

[0017] Further, the water discharge pipe opening has an inverted circular truncated cone structure, and the height of the inverted circular truncated cone structure of the installed water discharge pipe opening is within the thickness range of the bridge deck pavement.

[0018] Further, the hanger is a thin steel plate hanger, the thin steel plate hanger has a width of 35-50 mm and a thickness of at least 3 mm, and the thin steel plate hanger is used for fixing or suspending the longitudinal water discharge pipe under the flange plate of the bridge side beam.

[0019] Further, the water discharge grounding pipe connects the new water discharge pipe and the longitudinal water discharge pipe through a tee pipe, or the water discharge grounding pipe connects the longitudinal water discharge pipe through an elbow.

[0020] Further, the new water discharge pipe, the longitudinal water discharge pipe and the water discharge grounding pipe are all De160 PVC-U pipes.

[0021] Compared with the prior art, the bridge deck pavement side water ditch drainage system has the following beneficial effects:

[0022] The bridge deck pavement side water ditch drainage system is suitable for bridge engineering asphalt concrete pavement, cement concrete pavement and the like, when the bridge deck has water, the bridge deck water (rainwater, sewage for washing the bridge deck) flows into the gutter at the joint of the bridge deck pavement and the crash barrier along the bridge deck transverse slope, and then flows along the longitudinal slope in the gutter according to gravity, and then the bridge deck water is discharged from the bridge system along the following path: the gutter, the new water collecting head, the new water discharge pipe, the longitudinal water discharge pipe, the water discharge grounding pipe, the bridge underdrain or municipal rainwater inlet, and the natural ditch or rainwater pipe network, thereby forming a new bridge deck drainage system.

[0023] The utility model discloses, preferably solve the problem that the bridge deck side has no water storage facility and cannot avoid the bridge deck ponding, make the bridge deck drainage facility more adapt to bridge structure, drainage characteristics. The utility model discloses setting the drainage open ditch on the low side of bridge elevation, and this drainage open ditch improves the water storage capacity of bridge side, makes the rainwater through drainage open ditch and can be concentrated collection, concentrated drainage, preferably solve the bridge deck ponding problem. BRIEF DESCRIPTION OF DRAWINGS

[0024] The utility model discloses the technology is further detailed below in combination with the drawings and specific embodiment:

[0025] Figure 1 It is the top view (partial schematic view) of the drainage open ditch and new type water collecting mouth of the utility model and setting on the bridge side;

[0026] Figure 2 It is Figure 1 The sectional view (partial schematic view) at X1-X1;

[0027] Figure 3 It is Figure 1 The sectional view (partial schematic view) at X2-X2;

[0028] Figure 4 It is the elevation view (partial schematic view) of the bridge pier and bridge abutment place arrangement drainage grounding pipe of the utility model;

[0029] Figure 5 It is Figure 4 The partial schematic view of the low side of bridge elevation;

[0030] Figure 6 It is the cross section schematic view of the channel steel of the utility model;

[0031] Figure 7 It is the cross section schematic view of the channel steel of the utility model and setting on the cement mortar cushion layer through the adhesive layer;

[0032] Figure 8 It is three views (the first is the elevation front view of the new type water collecting mouth, the second is the left view of the first, and the third is the top view of the first) of the new type water collecting mouth of the utility model;

[0033] Figure 9 It is the elevation schematic view (partial schematic view) of the new type drain pipe and setting drain pipe mouth on the utility model;

[0034] Figure 10 It is Figure 9 The top view of the middle grid cover.

[0035] REFERENCE SIGNS:

[0036] 1 - gutter; B - channel;

[0037] 2 - cement mortar cushion; C - bonding layer;

[0038] 3 - new water collecting inlet; 31 - access notch; 32 - position notch; R1 - one side; R2 - one side;

[0039] 4 - new drain pipe; 41 - drain pipe opening; 411 - inverted circular truncated cone structure; E - height; 412 - top structure; 42 - grating cover; D - drain hole;

[0040] 5 - longitudinal drain pipe;

[0041] 6 - hanger;

[0042] 7 - drainage grounding pipe;

[0043] A - bridge deck elevation; 81 - bridge deck pavement; F - thickness; 82 - crash barrier; 83 - side beam; 831 - flange plate; 832 - T beam; G - hole; 84 - bridge pier; 85 - abutment; 86 - bridge integral cast-in-place layer; i - bridge deck cross slope; j - longitudinal slope; K - positioning hoop; M - joint; P - expansion bolt; X1 - X1 - cross-sectional symbol; X2 - X2 - cross-sectional symbol. DETAILED DESCRIPTION

[0044] The concept, specific structure and technical effects of the present application will be described clearly and completely in combination with the embodiments and the drawings, so as to fully understand the purpose, scheme and effects of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The same reference signs used in the drawings indicate the same or similar parts.

[0045] It should be noted that, unless otherwise specified, when a certain feature is referred to as being "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right and other descriptions used in the present application are only relative to the mutual position relationship of the components of the present application in the drawings.

[0046] REFERENCE Figures 1 to 10The utility model provides a bridge deck pavement side part water channel drainage system, including drainage open ditch 1, cement mortar cushion 2, new type water collecting mouth 3, new type drain pipe 4, longitudinal drainage pipe 5, hanger 6 and drainage ground pipe 7, the drainage open ditch 1 of bridge deck elevation A lower side of bridge is closely attached to the crash barrier 82 of bridge deck pavement layer 81 and is longitudinally arranged, and the cement mortar cushion 2 is longitudinally arranged, and the drainage open ditch 1 is arranged on the cement mortar cushion 2, and every bridge side part is provided with a new type water collecting mouth 3 at a set interval, and the drainage open ditch 1 is communicated with the new type water collecting mouth 3, and the new type water collecting mouth 3 is connected with the new type drain pipe 4, and a plurality of new type drain pipes 4 of each bridge are connected in series through the longitudinal drainage pipe 5, and the longitudinal drainage pipe 5 is arranged in the lower part of bridge side beam 83 through the hanger 6, and the longitudinal drainage pipe 5 is connected with the drainage ground pipe 7 fixed at the pier 84 or abutment 85, so that the bridge deck water can flow into the bridge underdrain or municipal stormwater inlet along the drainage ground pipe 7 and finally be discharged into the natural ditch or rainwater pipe network, preferably, every bridge side part is provided with a new type water collecting mouth 3 at every 10m.

[0047] Referring to Figures 1 to 10 In one embodiment, the drainage open ditch 1 is a channel steel B provided with a rust-proof layer, and the rust-proof layer is coated with SBS modified asphalt. The minimum width of the common domestic motor vehicle tire is 155mm, so as to avoid the tire of the occasional passing vehicle from sinking into the drainage open ditch 1, the net width of the drainage open ditch 1 should be less than 155mm; preferably, the channel steel B is a 16b type channel steel; the external dimensions of the 16b type channel steel are 160mm in width and 65mm in height, the internal dimensions are 154.7mm in top width (less than 155mm), 116.3mm in bottom width, and 56.5mm in height, and the cross-sectional area of the 16b type channel steel is 0.01m 2 .

[0048] Referring to Figure 2 , Figure 6 and Figure 7 In one embodiment, the drainage open ditch 1 is connected with the cement mortar cushion 2 through a bonding layer C; preferably, the bonding layer C is SBS modified asphalt with a thickness of 5mm.

[0049] Referring to Figure 2 , Figure 6 and Figure 7 In one embodiment, the cement mortar cushion 2 is a hard cement mortar layer with a thickness of 25mm to 35mm. Preferably, the thickness of the hard cement mortar cushion is 30mm, which is not only a cushion structure of the drainage open ditch, but also a discharge channel for the water seepage between the bridge deck pavement layers (the cement mortar cushion 2 is longitudinally arranged and can be connected with the new type water collecting mouth 3).

[0050] Referring toFigures 1 to 10 In one embodiment, the new water collecting mouth 3 has one side R1 flush with the top surface of the bridge deck pavement 81, and at least one side R2 is provided with an access notch 31 for the installation of the drainage ditch 1, and the new water collecting mouth 3 has a position notch 32 in the middle for the installation of the drain pipe opening 41. Preferably, the new water collecting mouth 3 is cast in-situ with C30 concrete, and the length of the new water collecting mouth 3 is 450 mm, the width is 350 mm, and the height of the highest side R1 is 100 mm; the length of the position notch 32 is 250 mm, and the width is 250 mm.

[0051] Referring to Figures 1 to 10 In one embodiment, one end of the new drain pipe 4 is communicated with the new water collecting mouth 3 through the drain pipe opening 41, and the other end of the new drain pipe 4 is connected with the longitudinal drainage pipe 5 through a tee pipe. Preferably, the tee pipe is a 160 type tee pipe.

[0052] Referring to Figure 9 And Figure 10 In one embodiment, the drain pipe opening 41 is provided with a plurality of drain holes D on the side wall, preferably, three rows of drain holes D are arranged according to the arrangement requirement of (hole to hole) interval of 20 mm, and the (circular) drain hole D has a diameter of 10 mm; the drain pipe opening 41 is further provided with a grating cover 42, and the grating cover 42 is also provided with a plurality of drain holes D, preferably, three rows of drain holes D are arranged according to the arrangement requirement of (hole to hole) interval of 20 mm, and each (square) drain hole D has a length of 30 mm and a width of 10 mm.

[0053] Referring to Figure 9 And Figure 10 In one embodiment, the drain pipe opening 41 has an inverted circular truncated cone structure 411; the height E of the inverted circular truncated cone structure 411 of the installed drain pipe opening 41 is within the thickness F of the bridge deck pavement 81 (that is, it is understood that the height E of the inverted circular truncated cone structure 411 is less than the thickness F of the bridge deck pavement 81). Preferably, the top structure 412 of the drain pipe opening 41 has an outer diameter of 250 mm and an inner diameter of 200 mm; the grating cover 42 is made of PVC-U material, has a diameter of 200 mm and a thickness of 25 mm, and is arranged on the top structure 412 of the drain pipe opening 41; the bottom of the inverted circular truncated cone structure 411 of the drain pipe opening 41 has an outer diameter of 160 mm and an inner diameter of 150.6 mm.

[0054] Referring to Figures 1 to 5In an embodiment, the hanger 6 is a thin steel plate hanger, which is 35-50 mm wide and at least 3 mm thick; the thin steel plate hanger is used to fix or suspend the longitudinal drainage pipe 5 under the flange plate 831 of the bridge side beam 83. Preferably, the thin steel plate hanger is made of Q235 material; preferably, the thin steel plate hanger is fixed under the flange plate 831 of the bridge side beam 83 by expansion bolts P; preferably, the thin steel plate hanger is provided with a corrosion-resistant layer (or other corrosion-resistant measures are taken).

[0055] Referring to Figures 1 to 5 In an embodiment, the bridge side beam 83 can be one of a T-beam 832, a small box girder, a hollow slab, and a continuous box girder; the flange plate 831 of the bridge side beam 83 is provided with a hole G at a corresponding position, which is used to accommodate the drain pipe opening 41 and the new drain pipe 4; the hole G is 160 mm in diameter.

[0056] Referring to Figures 1 to 5 In an embodiment, the drainage grounding pipe 7 is fixed on the pier 84 or abutment 85 by a positioning hoop K; the positioning hoop K is a thin steel plate positioning hoop, which is preferably made of Q235 material; in an embodiment, the positioning hoop K is 35-50 mm wide and at least 3 mm thick. Preferably, the positioning hoop K is fixed on the pier 84 or abutment 85 by expansion bolts P; preferably, the positioning hoop K is provided with a corrosion-resistant layer (or other corrosion-resistant measures are taken).

[0057] In an embodiment, the drainage grounding pipe 7 connects the new drain pipe 4 and the longitudinal drainage pipe 5 through a tee joint, or the drainage grounding pipe 7 connects the longitudinal drainage pipe 5 through an elbow.

[0058] Referring to Figures 1 to 5 In an embodiment, the new drain pipe 4, the longitudinal drainage pipe 5, and the drainage grounding pipe 7 are all De160 PVC-U pipes. Wherein, De refers to the outer diameter of the pipe.

[0059] Referring to Figures 1 to 5 In an embodiment, a bridge integrated cast-in-place layer 86 is provided on the bridge deck, which is made of C40 reinforced concrete cast-in-place, and the thickness of the bridge integrated cast-in-place layer 86 is 100 mm. Preferably, the bridge deck pavement layer 81 is provided on the bridge integrated cast-in-place layer 86, which is made of two layers of asphalt concrete or one layer of asphalt concrete or one layer of C40 reinforced concrete, and the thickness of the bridge deck pavement layer 81 is 100 mm. A crash barrier 82 is provided on the side of the bridge, which is preferably a New Jersey guardrail; the crash barrier 82 can also be a guardrail of SS level or Sa level crash barrier.

[0060] In one embodiment, a method for installing a bridge deck pavement edge gutter drainage system, comprising the following steps:

[0061] S1, installation of a new water collecting port 3; wherein the new water collecting port 3 is in a stepped shape, the thickness of one side R1 close to the bridge deck pavement layer 81 is relatively thick, and the thickness of one side close to the crash barrier 82 is relatively thin, the stepped shape is formed by the difference between the thicknesses, and the new water collecting port 3 has a position gap 32 in the top view of the middle part. In order to prevent damage during transfer, the new water collecting port 3 is generally not prefabricated, but is constructed at the reserved hole G of the flange plate 831 of the bridge edge beam 83 after the construction of the integral in-situ layer 86 of the bridge.

[0062] S2, installation of a 16b type channel steel; after the construction of the new water collecting port 3 is completed, the installation is in the order from bottom to top, the cement mortar cushion layer 2, the bonding layer C and the 16b type channel steel are respectively constructed, the 16b type channel steel should be pre-treated with rust prevention and SBS modified asphalt coating; after the installation of the 16b type channel steel is completed, the bridge deck pavement layer 81 should be constructed as soon as possible to prevent the drainage open ditch 1 from being damaged by construction vehicles and machines; after the construction of the bridge deck pavement layer 81 is completed, SBS modified asphalt should be poured at the joint between the side wall of the 16b type channel steel and the bridge deck pavement layer and the joint between the side wall of the new water collecting port and the bridge deck pavement layer.

[0063] S3, installation of a water discharge pipe opening 41 and a new water discharge pipe 4; in order to prevent the new water discharge pipe 4 from being blocked, the water discharge pipe opening 41 and the new water discharge pipe 4 should be installed after the construction of the bridge deck pavement layer 81 is completed.

[0064] S4, installation of a longitudinal drainage pipe 5; after the installation of the water discharge pipe opening 41 and the new water discharge pipe 4 is completed, the longitudinal drainage pipe 5 is installed and is fixed or suspended under the flange plate 831 of the bridge edge beam 83 through a hanger 6.

[0065] S5, installation of a drainage grounding pipe 7; after the installation of the longitudinal drainage pipe 5 is completed and the construction of the bridge underdrain or the municipal rainwater inlet is completed, the drainage grounding pipe 7 is installed and is fixed on the bridge pier 84 or the abutment 85 through a positioning hoop K.

[0066] The utility model has the following technical advantages:

[0067] (1) The utility model better solves the problem that there is no water storage facility at the edge of the bridge deck and the bridge deck waterlogging cannot be avoided, and the utility model "a bridge deck pavement edge gutter drainage system" is more suitable for the bridge structure and the characteristics of water collection and drainage; the utility model sets the drainage open ditch 1 at the side of the bridge deck elevation A where the water is accumulated, the drainage open ditch 1 improves the water storage capacity of the edge of the bridge, the rainwater can be collected and discharged through the drainage open ditch 1, and the problem of bridge deck waterlogging is better solved.

[0068] (2) The utility model sets up 16b type channel steel, and the water section area of the open drainage ditch 1 is increased by 0.01m 2 , rainwater does not need to flow massively, the water release channel demand is reduced, the interval of the water collecting port and the water release pipe is prolonged from 5m to 10m, and the water accumulation discharge demand can be met. The utility model reduces the setting number of the water collecting port (new type water collecting port 10m is set in one place) and the water release pipe, reduces the strengthening design of the side beam of the bridge, and improves the bridge landscape effect.

[0069] (3) The utility model cancels the gravel blind ditch, and adopts the hard cement mortar cushion layer to replace, the hard cement mortar cushion layer can be used as the cushion structure of the open drainage ditch 1 and can also discharge the interlayer seepage of the bridge deck pavement, the design construction is simple, and the construction organization difficulty is reduced.

[0070] (4) The 16b type channel steel can be used for the bridge deck pavement of various structural types, and has wide applicability.

[0071] (5) The utility model guarantees the integrity of the bridge deck pavement 81 and the open drainage ditch 1, the new type water collecting port 3 and other facilities, the side wall of the 16b type channel steel can be used as the constraint formwork when the bridge deck pavement 81 is constructed, and after the construction is completed, the bridge deck pavement 81 also does not have free edge, and the bituminous concrete pavement edge is avoided.

[0072] The other contents of the bridge deck pavement side part water ditch drainage system can be seen from the prior art, and will not be repeated here.

[0073] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, so any modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model, still belongs to the range of the utility model technical scheme.

Claims

1. A drainage system for the edge of a bridge deck pavement, characterized in that, The system includes an open drainage ditch, a cement mortar bedding layer, a novel water inlet, a novel drainage pipe, a longitudinal drainage pipe, a hanger, and a drainage grounding pipe. The open drainage ditch is installed on the side of the bridge with the lower elevation, where the bridge deck pavement is close to the crash barrier. The open drainage ditch is located on the cement mortar bedding layer. A novel water inlet is installed at predetermined intervals along the edge of the bridge. The open drainage ditch is connected to the novel water inlet. The novel drainage pipe is connected to the novel water inlet. Several novel drainage pipes in each span of the bridge are connected in series through the longitudinal drainage pipe, which is installed under the bridge side beam via the hanger. The longitudinal drainage pipe is connected to the drainage grounding pipe fixed at the pier or abutment.

2. The bridge deck pavement edge drainage system according to claim 1, characterized in that, The drainage ditch is made of channel steel, which has a rust-proof layer and is coated with asphalt.

3. The bridge deck pavement edge drainage system according to claim 1, characterized in that, The cement mortar cushion layer is a rigid cement mortar cushion layer, and the thickness of the rigid cement mortar cushion layer is 25mm to 35mm.

4. The bridge deck pavement edge drainage system according to claim 1, characterized in that, The new type of water inlet is flush with the top surface of the bridge deck pavement on one side, and at least one side of the new type of water inlet is provided with an access notch to adapt to the installation of the drainage ditch, and the center of the new type of water inlet is provided with a position notch to adapt to the installation of the drain pipe.

5. The bridge deck pavement edge drainage system according to claim 1, characterized in that, One end of the new type of drain pipe is connected to the new type of water collection port through the drain pipe outlet, and the other end of the new type of drain pipe is connected to the longitudinal drain pipe through a tee pipe.

6. The bridge deck pavement edge drainage system according to claim 5, characterized in that, The drain outlet has several drain holes on its side wall; the drain outlet is also provided with a grid cover, which also has several drain holes.

7. The bridge deck pavement edge drainage system according to claim 5, characterized in that, The drain outlet has an inverted frustum structure; after installation, the height of the inverted frustum structure of the drain outlet is within the thickness range of the bridge deck pavement layer.

8. The bridge deck pavement edge drainage system according to claim 1, characterized in that, The hanger is a thin steel plate hanger, which is 35mm to 50mm wide and at least 3mm thick; the thin steel plate hanger is used to fix or suspend the longitudinal drainage pipe under the flange plate of the bridge side beam.

9. The bridge deck pavement edge drainage system according to claim 1, characterized in that, The drainage grounding pipe is connected to the new type of drain pipe and the longitudinal drainage pipe through a tee pipe, or the drainage grounding pipe is connected to the longitudinal drainage pipe through an elbow.

10. The bridge deck pavement edge drainage system according to any one of claims 1 to 9, characterized in that, The new type of drain pipe, the longitudinal drain pipe, and the drain grounding pipe are all De160 type PVC-U pipes.

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