CN111705642A

CN111705642A - Hidden drainage system of municipal administration bridge

Info

Publication number: CN111705642A
Application number: CN202010437151.9A
Authority: CN
Inventors: 诸国强; 沈红; 谭松坤; 徐丽青; 严高翔; 张纬; 姚佳宇; 沈鸿立; 王方; 闻晓枫
Original assignee: Zhejiang Lixin Construction Group Co ltd
Current assignee: Zhejiang Lixin Construction Group Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-09-25

Abstract

The invention relates to a municipal bridge hidden drainage system, which comprises a plurality of drainage grooves, box girder hoses, pier hoses, galvanized steel pipes, pipeline sealing connecting devices and rubber gaskets, wherein the drainage grooves are arranged on two sides of a box girder and used for collecting rainwater, the box girder hoses are arranged on the box girder and are in sealing connection with water outlets of the drainage grooves, the pier hoses are arranged on piers and are in sealing connection with municipal drainage facilities, the galvanized steel pipes are arranged between the box girder hoses and the pier hoses and are in sealing connection with the box girder hoses and the pier hoses, the pipeline sealing connecting devices are arranged at two ends of the box girder hoses and the pier hoses and play a role in sealing connection, each sealing connecting device comprises an end block, a sealing head, a sealing joint and a rubber gasket, the end blocks are in tight fixed connection with two ends of each box girder hose and two ends of each pier hose, the sealing heads are rotatably connected with the end blocks, the sealing joints are arranged at two ends of, possess the difficult effect that breaks away from in case roof beam hose and pier hose both ends, avoids the direct hourglass of rainwater.

Description

Hidden drainage system of municipal administration bridge

Technical Field

The invention relates to the technical field of bridge drainage, in particular to a municipal bridge hidden drainage system.

Background

If there is more serious ponding phenomenon in the bridge and can influence the structural strength of bridge self, for this reason need ensure that the bridge sets up drainage system in order to ensure that the bridge can not produce ponding in the rainy condition, and general bridge drainage system can set up the longitudinal and transverse slopes and combine the drain pipe to discharge bridge floor ponding to municipal drainage facility and handle, but traditional bridge drainage system's drain pipe exposes, both made the drain pipe corroded the emergence damage easily, the life-span reduces, still can influence city appearance simultaneously, present hidden bridge drainage system is designed out in order to satisfy above-mentioned requirement for this reason.

The existing hidden bridge floor drainage system is provided with a notice number CN107447657A, and comprises a galvanized steel pipe arranged inside a box girder and a galvanized steel pipe arranged inside a pier, wherein the galvanized steel pipe is connected with a bridge floor rainwater collecting port and a ground rainwater well, the galvanized steel pipe arranged inside the box girder is connected with the bridge floor rainwater collecting port through a first three-way joint, the galvanized steel pipe arranged inside the box girder is connected with the galvanized steel pipe arranged inside the pier through a rubber hose, and the galvanized steel pipe arranged inside the pier is connected with the ground rainwater well. The drainage pipeline adopts galvanized steel pipes and is arranged in the box girder and the bridge pier, so that the durability of the pipeline and the overall landscape effect of the bridge are ensured. The galvanized steel pipe arranged in the box girder is connected with the galvanized steel pipe arranged in the pier through a rubber hose.

The above prior art solutions have the following drawbacks: the galvanized steel pipe arranged in the box girder and the galvanized steel pipe and the rubber hose arranged in the pier are connected in a splicing and sleeving mode, so that the rubber hose and the galvanized steel pipe are unstable, the rubber hose and the galvanized steel pipe are separated easily, and rainwater collected by the galvanized steel pipe arranged in the box girder can not flow into the ground rainwater well.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a municipal bridge hidden drainage system which has the effect that the connection between a drainage pipeline of a box girder and a drainage pipeline of a pier is stable, so that the drainage pipeline and a rubber hose cannot be separated randomly.

The above object of the present invention is achieved by the following technical solutions:

the hidden drainage system for the municipal bridge comprises a plurality of drainage grooves, a box girder hose, a pier hose, a galvanized steel pipe, a pipeline sealing connecting device, a steel pipe support and a maintenance groove, wherein the plurality of drainage grooves are arranged on two sides of a box girder and collect rainwater, the box girder hose is arranged in the box girder and is in sealing connection with a drainage groove water outlet, the pier hose is arranged in a pier and is in sealing connection with a municipal drainage facility, the galvanized steel pipe is arranged between the box girder hose and the pier hose and is in sealing connection with the box girder hose and the pier hose, the pipeline sealing connecting device is arranged at two ends of the box girder hose and two ends of the pier hose and plays a sealing connection role, the steel pipe support is arranged at the pier and supports and fixes the galvanized steel pipe, the maintenance groove is arranged below the drainage groove, connection between the box girder hose and the drainage grooves is conveniently released, the sealing connecting device comprises end blocks, which are tightly and fixedly connected to two ends of the box girder hose and two ends of the pier hose The sealing joint of inner wall, locate in the sealing joint and with the rubber packing ring that the sealing joint terminal surface is closely supported mutually.

Through adopting above-mentioned technical scheme, put into box girder and pier back among box girder and the pier with box girder hose or pier hose, carry out rotatory screw thread sealing connection with the sealing head corresponding to sealing joint, make the terminal surface of sealing joint terminal surface and end block closely butt mutually, guarantee that box girder hose and pier hose can not break away from at will and threaded connection's mode makes box girder hose and pier hose conveniently take out and carry out silt clearance and change, avoid appearing being difficult to change when box girder hose and pier hose pipe wall take place to destroy, rubber packing ring makes under the pressure effect between sealing joint and end block simultaneously, ensure that the rainwater can not leak from the junction easily.

The present invention in a preferred example may be further configured to: the upper part of the drainage groove is covered with a drainage cover plate, the inner wall of the drainage groove is inclined, and the drainage groove takes a self drainage port as the lowest point.

Through adopting above-mentioned technical scheme, the drain cover board can stop bulky debris in the outside of water drainage tank, avoid debris to get into the delivery port that water drainage tank blockked water drainage tank to the water drainage tank, make there be ponding existence and influence the emission of rainy day rainwater in the water drainage tank, make the rainwater spill over water drainage tank take place the rainwater continuation condition on the surface of case roof beam, it is current to influence the vehicle, and cause the corruption to case roof beam surface, influence the life of case roof beam, water drainage tank inner wall slope makes the rainwater can not gather in water drainage tank simultaneously, avoid the rainwater to gather for a long time and give out odour in water drainage tank, it is relatively poor to the municipal administration environmental impact, and the water drainage tank inner wall of slope still can avoid silt to pile up in water drainage tank, ensure that silt can discharge among the case roof beam hose along with the rainwater inflow, avoid water drainage tank in rainwater to save very easily.

The present invention in a preferred example may be further configured to: the drainage cover plate comprises a frame plate covering the upper part of the drainage groove, and a water passing plate which is embedded in the frame plate and can permeate rainwater downwards, wherein a filter basket is fixedly connected to the lower surface of the frame plate, the filter basket is obliquely arranged, and one end of the filter basket in the length direction is the lowest point.

Through adopting above-mentioned technical scheme, the little volume debris that the filter screen basket will pass through the drainage cover plate further filter, avoid little volume debris to pile up or enter into among box girder hose and the pier hose at the water drainage tank, it is very easily to make box girder hose or pier hose take place to block up, set up filter screen basket slope simultaneously and make the debris of little volume pile up in one side of filter screen basket under the washing away drive effect of rainwater, it is full at filter screen basket bottom surface to avoid little volume debris to pave, make the infiltration rate of rainwater from filter screen basket that enters into in the filter screen basket through drainage cover plate slower, even under the less condition of rainfall, the condition that rainwater spills out drainage cover plate also can appear very easily, and will cross the water board and lift up and can make and clear up the debris in the filter screen basket, and is comparatively convenient.

The present invention in a preferred example may be further configured to: the drain tank side is equipped with the sluicing groove that communicates in the drain tank, and the junction height of sluicing groove and drain tank is less than the upper portion water inlet height of drain tank, and sluicing groove lower part outlet runs through to the outside of case roof beam, and the sluicing groove is located the bottom surface slope of opening bottom surface orientation drain tank in the drain tank.

By adopting the technical scheme, when the drainage speed of the box girder hose is lower than the speed of rainwater entering the drainage groove under the condition of heavy rainfall, the water level in the drainage groove rises until the rainwater can enter the connecting opening of the drainage groove and the drainage groove, and then the rainwater can enter the drainage groove and is directly discharged from the bottom surface of the box girder through the drainage groove, so that the rainwater cannot overflow from the drainage groove under the condition of heavy rainfall, a large amount of accumulated water on the surface of the box girder under the condition of heavy rainfall is avoided, the box girder can deal with the condition of heavy rainfall, and simultaneously, the rainwater with poor water quality enters municipal drainage facilities through the box girder hose and the pier hose under the initial scouring drive of the rainwater, and the later rainwater which is relatively clean can be directly discharged through the drainage groove without further water quality treatment, so that convenience is achieved, and simultaneously, the cost is reduced.

The present invention in a preferred example may be further configured to: the bottom end of the pier hose is connected with a pump pipe in a sealing mode, and one end, far away from the pier hose, of the pump pipe is provided with a water outlet communicated to a drainage pump of a municipal drainage facility.

Through adopting above-mentioned technical scheme, make the rainwater when the drainage tank gathers when the rainfall is stronger, can open the drainage speed that the drain pump accelerated case roof beam hose and pier hose in step, reduce the water level of drainage tank, and simultaneously, rivers in case roof beam hose and the pier hose are washd the deposit to impurity such as silt of attaching to the inner wall under the effect of drainage pump, make case roof beam hose and pier hose obtain the clearance, also make effective water cross section grow of case roof beam hose and pier hose, further promote the speed that the rainwater discharged.

The present invention in a preferred example may be further configured to: the outer walls of the two ends of the galvanized steel pipe are both in threaded connection with sleeves, and the sealing heads can extend into the sleeves.

Through adopting above-mentioned technical scheme, rotate two sleeves for the sleeve pipe is hidden sealing head and sealing joint among the gallipot, reduces destruction and corruption that sealing head and sealing joint probably received as far as, prolongs sealing head and box girder hose and pier hose's life, also conveniently relieves box girder hose and pier hose and galvanized steel pipe's being connected simultaneously, is convenient for change box girder hose and pier hose.

The present invention in a preferred example may be further configured to: the opening of the maintenance groove is fixedly connected with a sliding plate frame, and the sliding plate frame is slidably connected with a sliding plate capable of sealing the sliding plate frame.

Through adopting above-mentioned technical scheme, slide the slide, can rotate sealed head and make the connection of case roof beam hose and water drainage tank's delivery port remove, be convenient for change case roof beam hose, simultaneously among the change process, it is comparatively convenient not need to grip the slide.

The present invention in a preferred example may be further configured to: the box girder hose and the pier hose are all sleeved with steel sleeves embedded in the box girder and the pier, the sealing heads are slidably connected to the inner walls of the steel sleeves, and the steel sleeve openings and turning points are all subjected to fillet treatment.

Through adopting above-mentioned technical scheme, the steel casing pipe can be protected case roof beam hose and pier hose, avoid when pulling out pier hose or case roof beam hose, can make pier hose and case roof beam hose surface receive destruction, the fillet is handled simultaneously and is made the hose can not receive too big pressure with steel casing pipe opening contact department, avoid steel pipe opening or turning point department to cause the shear mark to pier hose and case roof beam hose, make case roof beam hose and pier hose take place the phenomenon of leaking for a long time easily.

The present invention in a preferred example may be further configured to: the coaxial fixedly connected with ring tube of steel casing orientation sheathed tube one end, the ring tube is offered towards the sheathed tube terminal surface is coaxial and is supplied the slot of sleeve pipe grafting, is equipped with the rubber layer in the slot.

Through adopting above-mentioned technical scheme, make the sleeve pipe peg graft and enter into to the slot in when rotating the sleeve pipe to the rubber layer makes between sleeve pipe and the ring pipe sealed, further reduces the sealed head and the corrosion or the damage effect that sealed joint and box girder hose and pier hose probably received.

The present invention in a preferred example may be further configured to: the side that the water drainage tank deviates from the water drainage tank is equipped with the water catch bowl of seting up in the case roof beam, and the water catch bowl communicates in the water drainage tank, and the delivery port intercommunication of water catch bowl has high pressure water pump, and high pressure water pump delivery port intercommunication has the outlet pipe, and the opening that high pressure water pump was kept away from to the outlet pipe is just to the delivery port of water drainage tank, and the water inlet upper portion department fixedly connected with of water catch bowl is the baffle of L shape.

Through adopting above-mentioned technical scheme, rainwater in the water drainage tank is when building up a water level, can enter into and gather among the water catch bowl, then the rainwater pump in with the water catch bowl goes into the outlet pipe, make high-pressure water column strike water drainage tank's delivery port along the outlet pipe, the delivery port of avoiding water drainage tank receives piling up of silt and hinders and make water drainage tank's play water velocity reduce, the baffle makes at first among the more rainwater of silt can not enter into the water catch bowl simultaneously, avoid silt more entering into to pile up in the water catch bowl, ensure that high-pressure water pump can normal operating.

In summary, the invention includes at least one of the following beneficial technical effects:

after the box girder hose or the pier hose is placed into the box girder and the pier, the sealing head is in rotary threaded sealing connection corresponding to the sealing joint, so that the end face of the sealing joint is tightly abutted to the end face of the end block, the box girder hose and the pier hose are prevented from being separated randomly and are in threaded connection, the box girder hose and the pier hose are convenient to take out for silt cleaning and replacement, the situation that the pipe walls of the box girder hose and the pier hose are difficult to replace when damaged is avoided, and meanwhile, the rubber gasket ensures that rainwater cannot be easily leaked from a connecting point under the pressure action between the sealing joint and the end block;

rainwater in the drainage tank can enter into the water collecting tank and gather when gathering up to a certain water level, then rainwater pump in with the water collecting tank goes into the outlet pipe, make high-pressure water column strike the delivery port of drainage tank along the outlet pipe, the delivery port of avoiding drainage tank receives the heap hindrance of silt and makes drainage tank's delivery rate reduce, the baffle makes at first among the more rainwater of silt can not enter into the water collecting tank simultaneously, avoid silt more to enter into and pile up in the water collecting tank, ensure that high-pressure water pump can normal operating.

Drawings

FIG. 1 is a schematic diagram of the main structure of the present invention;

FIG. 2 is a partial cross-sectional structural schematic view of a box girder;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

FIG. 5 is a schematic view of the construction of a strainer basket at one end of a box girder;

FIG. 6 is a bottom view of the bottom of one side of the box girder;

fig. 7 is a schematic view of a part of the sectional structure of the box girder at the position where the service groove and the water collecting groove are formed.

In the figure, 1, a drainage groove; 2. a box girder hose; 21. a high pressure water pump; 22. a baffle plate; 23. a frame plate; 24. a water passing plate; 25. a water outlet pipe; 26. a steel pipe bracket; 27. a frame plate groove; 28. a water passing plate groove; 3. a pier hose; 31. a strainer basket; 32. a maintenance groove; 33. a slide frame; 34. a slide plate; 35. steel casing; 36. a circular ring tube; 37. a slot; 38. a rubber layer; 39. a water collection tank; 4. a galvanized steel pipe; 41. an end-block; 42. a sealing head; 43. sealing the joint; 44. a rubber gasket; 45. a drain cover plate; 46. a water drainage tank; 47. a pump tube; 48. draining pump; 49. a sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the municipal bridge hidden drainage system disclosed by the invention comprises a plurality of drainage channels 1 arranged at two ends of a box girder in the width direction along the length direction of the box girder, each pier corresponds to one drainage channel 1, the middle of the upper surface of the box girder is high and two ends are low, so that rainwater flows to the drainage channels 1 at two sides of the box girder, box girder hoses 2 and pier hoses 3 which are hermetically communicated and discharge accumulated water in the drainage channels 1 are respectively arranged in the box girder and the piers, a vertical galvanized steel pipe 4 is arranged between the piers and the box girder to communicate the pier hoses 3 with the box girder hoses 2, the upper surface of the pier is detachably connected with a steel pipe support 26 fixedly connected to the outer wall of the middle of the galvanized steel pipe 4, an opening at the bottom end of the pier hose 3 is communicated with a municipal drainage facility, a pump pipe 47 is hermetically connected to the opening at the bottom end of the pier hose 3, one end of, the water outlet of the drainage pump 48 is communicated to a municipal drainage facility, and both ends of the box girder hose 2 and the pier hose 3 are provided with sealing connection devices for hermetically connecting the openings of the box girder hose 2 and the pier hose 3.

Referring to fig. 2 and 3, the sealing connection device includes an end block 41 which is fixedly connected to the end portions of the box girder hose 2 and the pier hose 3 in a sealing manner and has a circular cross section, the end block 41 has an axis which is internally penetrated, the end block 41 is communicated with the box girder hose 2 and the pier hose 3, the outer wall of the end block 41 is rotatably connected with a hollow sealing head 42 which is provided with an opening and deviates from one end of the end block 41 in a sealing manner, a bottom water outlet of the drainage tank 1, two ends of the galvanized steel pipe 4 and a water inlet of the municipal drainage facility are fixedly connected with sealing joints 43 in a sealing manner, the outer wall of each sealing joint 43 is connected to the inner wall of the sealing head 42 in a threaded manner, each sealing joint 43 is communicated with a through portion of the sealing head 42.

Referring to fig. 4 and 5, drainage channel 1 top is covered along self length direction and is equipped with several drainage cover plate 45, the frame plate groove 27 that the width is greater than drainage channel 1 width is seted up to the case roof beam upper surface, drainage cover plate 45 is including sliding the framed panel 23 of pegging graft in frame plate groove 27, framed panel 23 upper surface runs through and has been seted up water passing plate groove 28, it is zigzag to cross water passing plate groove 28 lateral wall, it can correspond to peg graft and have had water passing plate 24 to cross water passing plate groove 28, it evenly runs through the several on water passing plate 24 surface and sets up the waist type hole that the rainwater will be discharged into drainage channel 1, frame 23 lower fixed surface is connected with carries out secondary filter screen basket 31 through the rainwater that water passing plate 24 infiltrated, filter screen basket 31 inner wall evenly runs through and sets up the several round hole, filter screen basket 31 length direction is on a parallel with framed panel 23 length direction and filter screen.

Referring to fig. 6 and 7, the inner wall of the drainage channel 1 is inclined, the water outlet of the drainage channel 1 is the lowest point, the inside of the box girder is provided with a drainage channel 46 which is positioned at the side edge of the drainage channel 1 and communicated with the drainage channel 1, the drainage channel 46 is symmetrically arranged by taking a pier as a central point to avoid the influence of the drainage channel on the arrangement of the box girder hose 2, the bottom of the drainage channel 46 penetrates through the bottom surface of the box girder, the height of the communication point of the drainage channel 46 and the drainage channel 1 is lower than the height of the upper opening of the drainage channel 1, the drainage channel 46 is positioned between the drainage channels 1 positioned at two sides of the box girder, the bottom surface of the opening of the drainage channel 46 positioned in the drainage channel inclines towards the bottom surface of the drainage channel 1 to avoid the water level in the rainwater drainage channel 1 entering into the drainage channel 46 when the height of the communication opening of the drainage channel 46 and the drainage channel 1 is, the height of an opening of the water collecting tank 39 in the water draining tank 1 is slightly lower than that of an opening of the water draining tank 46 in the water draining tank 1, the upper part of a water inlet of the water collecting tank 39 is fixedly connected with an L-shaped baffle plate 22 which is positioned in the water draining tank 1, the opening of the water collecting tank 39 in the water draining tank 1 is positioned on the inclined inner wall of the width direction of the water draining tank 1 so as to facilitate the arrangement of the baffle plate 22, the bottom end of the vertical section of the baffle plate 22 is lower than the height of the bottom surface of the opening of the water collecting tank 39, the bottom surface of the box girder is provided with an overhauling groove 32 which is communicated with the connection part of a water outlet at the bottom of the water draining tank 1 and the box girder hose 2, the water outlet at the bottom of the water collecting tank 39 is communicated with a high-pressure water pump 21 which is detachably connected in the overhauling groove 32, the water outlet of the high-pressure water pump 21 is hermetically connected with a water outlet pipe 25 which, the slide frame 33 is slidably connected with a slide plate 34 along the length direction thereof.

Referring to fig. 2 and 3, the two ends of the galvanized steel pipe 4 are both connected with the sleeve 49 through threads, the sealing head 42 and the sealing joint 43 can enter the sleeve 49, the steel sleeve 35 is pre-embedded in the box girder and the pier, the box girder hose 2 and the pier hose 3 are both located in the steel sleeve 35, the opening at the end part and the turning part of the steel sleeve 35 are both subjected to fillet treatment, the circular tube 36 is coaxially and fixedly connected with one end of the steel sleeve 35 facing the galvanized steel pipe 4, the slot 37 for the sleeve 49 to be inserted is coaxially formed in the end surface of the circular tube 36 facing the galvanized steel pipe 4, and the rubber layer 38 is adhered inside the slot 37.

The implementation principle of the embodiment is as follows: rainwater flows to the water drainage tank 1 of case roof beam width direction both sides along the case roof beam surface, rivers are downflow after the first filtration of crossing water sheet 24, then the rainwater carries out the downflow in the second filtration through filter screen basket 31, rivers gather to water drainage tank 1 delivery port along the slope inner wall of water drainage tank 1 and get into to case roof beam hose 2, galvanized steel pipe 4, pier hose 3, flow into at last and handle among the municipal drainage facility, when case roof beam hose 2 and pier hose 3 take place to block up and need change, rotate sealing head 42, can remove the sealing connection relation at case roof beam hose 2 and pier hose 3 both ends.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A municipal bridge hidden drainage system comprises a plurality of drainage channels (1) which are arranged at two sides of a box girder and collect rainwater, box girder hoses (2) which are arranged in the box girder and are hermetically connected with water outlets of the drainage channels (1), pier hoses (3) which are arranged in piers and are hermetically connected with municipal drainage facilities, locate between case roof beam hose (2) and pier hose (3) and with case roof beam hose (2) and pier hose (3) sealing connection's galvanized steel pipe (4), locate case roof beam hose (2) and pier hose (3) both ends and play the sealed connection device that acts on, locate pier department and support fixed steel pipe support (26) to galvanized steel pipe, water drainage tank (1) below is equipped with and is convenient for connect maintenance groove (32) of removing between case roof beam hose (2) and water drainage tank (1), its characterized in that: the sealing connection device comprises end blocks (41) which are tightly and fixedly connected to the two ends of the box girder hose (2) and the two ends of the pier hose (3) and are internally communicated, sealing heads (42) which are rotatably connected to the end blocks (41), sealing joints (43) which are arranged at the two ends of the galvanized steel pipe (4), the water outlet of the drainage tank (1), the water inlet of the municipal drainage facility and are in threaded connection with the inner walls of the sealing heads (42) through the outer walls, and rubber gaskets (44) which are arranged in the sealing heads (42) and are tightly abutted to the end faces of the sealing joints (43).

2. The municipal bridge hidden drainage system of claim 1, wherein: the upper part of the drainage groove (1) is covered with a drainage cover plate (45), the inner wall of the drainage groove (1) is inclined, and the drainage groove (1) takes a self drainage port as the lowest point.

3. The municipal bridge hidden drainage system of claim 2, wherein: the drainage cover plate (45) comprises a frame plate (23) covering the upper part of the drainage groove (1) and a water passing plate (24) which is embedded in the frame plate (23) and can permeate rainwater, a filter screen basket (31) is fixedly connected to the lower surface of the frame plate (23), the filter screen basket (31) is obliquely arranged, and one end of the filter screen basket (31) in the length direction is the lowest point.

4. The municipal bridge hidden drainage system of claim 1, wherein: drainage tank (1) side is equipped with water drainage tank (46) that communicates in drainage tank (1), and the junction height of water drainage tank (46) and drainage tank (1) is less than the upper portion water inlet height of drainage tank (1), and water drainage tank (46) lower part outlet runs through to the outside of case roof beam, and water drainage tank (46) are arranged in the opening bottom surface of drainage tank (1) and incline towards the bottom surface of drainage tank (1).

5. The municipal bridge hidden drainage system of claim 1, wherein: the bottom end of the pier hose (3) is connected with a pump pipe (47) in a sealing mode, and one end, far away from the pier hose (3), of the pump pipe (47) is provided with a water outlet communicated to a drainage pump (48) of a municipal drainage facility.

6. The municipal bridge hidden drainage system of claim 1, wherein: the outer walls of the two ends of the galvanized steel pipe (4) are in threaded connection with a sleeve (49), and the sealing head (42) can extend into the sleeve (49).

7. The municipal bridge hidden drainage system of claim 1, wherein: the opening of the maintenance groove (32) is fixedly connected with a sliding plate frame (33), and the sliding plate frame (33) is slidably connected with a sliding plate (34) capable of sealing the sliding plate frame (33).

8. The municipal bridge hidden drainage system of claim 6, wherein: case roof beam hose (2) and pier hose (3) outside all cup jointed steel casing pipe (35) of pre-buried in case roof beam and pier, but sealing head (42) sliding connection is in steel casing pipe (35) inner wall, and steel casing pipe (35) opening and turning point department all carry out the radius angle and handle.

9. The municipal bridge hidden drainage system of claim 8, wherein: the coaxial fixedly connected with ring tube (36) of steel sleeve (35) one end towards sleeve pipe (49), ring tube (36) are offered the slot (37) that supplies sleeve pipe (49) to peg graft towards the terminal surface coaxial of sleeve pipe (49), are equipped with rubber layer (38) in slot (37).

10. The municipal bridge hidden drainage system of claim 8, wherein: drainage tank (1) deviates from side of sluicing groove (46) and is equipped with water catch bowl (39) of seting up in the case roof beam, water catch bowl (39) communicate in sluicing groove (46), the delivery port intercommunication of water catch bowl (39) has high pressure water pump (21), high pressure water pump (21) delivery port intercommunication has outlet pipe (25), the opening that high pressure water pump (21) were kept away from in outlet pipe (25) is just to the delivery port of drainage tank (1), the water inlet upper portion fixedly connected with of water catch bowl (39) department is baffle (22) of L shape.