阅读说明：本技术 一种基于预制电缆槽的高速铁路桥面系结构及其施工方法 (A kind of high-speed railway bridge floor architecture and its construction method based on pre-fabricated electric cables slot ) 是由 刘斌 肖海荣 敖长江 禚锦鑫 高树青 郭志光 于 2019-09-09 设计创作，主要内容包括：本发明的基于预制电缆槽的高速铁路桥面系结构及其施工方法属于高速铁路桥面系结构技术领域,高速铁路桥面系结构包括预制梁、预制遮板、防护墙和截面呈U形的预制电缆槽,预制遮板沿顺桥向方向设置在预制梁的边缘并且沿横桥向方向间隔设置,防护墙沿顺桥向方向设置在预制遮板的内侧,预制电缆槽沿顺桥向方向设置在预制遮板和防护墙之间,预制电缆槽与预制遮板之间形成浇筑竖墙的凹槽。本发明能够提高运梁车的行车安全,保证结构的寿命,提高施工效率。预制电缆槽安装方法简单,施工质量更容易保证。(High-speed railway bridge floor architecture and its construction method based on pre-fabricated electric cables slot of the invention belongs to high-speed railway bridge floor architecture technical field, high-speed railway bridge floor architecture includes precast beam, prefabricated shield, the pre-fabricated electric cables slot that protecting wall and section are in U-shape, prefabricated shield is arranged in the edge of precast beam to direction along suitable bridge and is arranged along direction across bridge direction interval, protecting wall is along the inside that prefabricated shield is arranged in direction along bridge, pre-fabricated electric cables slot is arranged between prefabricated shield and protecting wall along bridge to direction, the groove for pouring straight wall is formed between pre-fabricated electric cables slot and prefabricated shield.The present invention can be improved the traffic safety of beam car, guarantee the service life of structure, improve construction efficiency.Pre-fabricated electric cables slot installation method is simple, and construction quality is easier to ensure that.)

1. a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot, including precast beam (1), prefabricated shield (2) and protection Wall (3), the prefabricated shield (2) set at the edge of precast beam (1) and along direction across bridge direction interval along bridge to direction setting It sets, the protecting wall (3) is arranged to direction in the inside of prefabricated shield (2) along bridge, it is characterised in that: further include section in U The pre-fabricated electric cables slot (4) of shape, the pre-fabricated electric cables slot (4) along bridge to direction be arranged prefabricated shield (2) and protecting wall (3) it Between, the groove for pouring straight wall (5) is formed between the pre-fabricated electric cables slot (4) and prefabricated shield (2).

2. a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot according to claim 1, it is characterised in that: institute It states and is reserved with signal of communication slot (11) between pre-fabricated electric cables slot (4) and protecting wall (3).

3. a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot according to claim 2, it is characterised in that: also The cover board (14) between pre-fabricated electric cables slot (4) and protecting wall (3), close pre-fabricated electric cables on the protecting wall (3) are closed including lid The side of slot (4) is equipped with boss (15), and cover board (14) lid closes between the top and boss (15) of pre-fabricated electric cables slot (4).

4. a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot according to claim 1, it is characterised in that: institute State in precast beam (1) position difference corresponding with protecting wall (3) in position corresponding with prefabricated shield (2) and precast beam (1) It is provided with beam body steel hoop (6), the beam body steel hoop (6) is arranged along direction across bridge direction interval, the beam body ring steel Muscle (6) includes the lower half portion being embedded in precast beam (1) and the exposed top half in precast beam (1) outside.

5. a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot according to claim 4, it is characterised in that: institute It states and is embedded with shield steel hoop (8) in prefabricated shield (2), the shield steel hoop (8) is arranged along direction across bridge direction interval, The shield steel hoop (8) includes the lower half portion that is embedded in prefabricated shield (2) and exposed in prefabricated shield (2) outside upper Half part, the top half of the shield steel hoop (8) are inserted between adjacent beam body steel hoop (6), and shield connects steel Muscle (9) passes through beam body steel hoop (6) and shield steel hoop (8) to direction along bridge, and upper with beam body steel hoop (6) The top half drawknot of half part, shield steel hoop (8), and then prefabricated shield (2) is connect with precast beam (1).

6. a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot according to claim 4, it is characterised in that: institute Stating protecting wall (3) is cast-in-place concrete structure, and the protecting wall (3) is interior to be embedded with protecting wall reinforcing bar (10) to direction along bridge, The protecting wall reinforcing bar (10) pass through beam body steel hoop (6) top half and with beam body steel hoop (6) drawknot.

7. a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot according to claim 4, it is characterised in that: institute It states and is additionally provided with beam body longitudinal reinforcement (7) in precast beam (1), the beam body longitudinal reinforcement (7) is threaded through beam body to direction along bridge In the lower half portion of steel hoop (6).

8. a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot described in any one according to claim 1~7 Construction method, it is characterised in that the following steps are included:

Step 1: production mold, casting concrete is obtained pre-fabricated electric cables slot (4) in a mold, and maintenance is qualified and reaches demoulding item Form removal after part；

Step 2: production cover board (14)；

Step 3: the beam face absolute altitude of review precast beam (1), is higher by beam face part and cuts, lower portions adjustment, in precast beam (1) The suitable bridge in edge edge is to direction setting-out and bullet draws the line of ink marker；

Step 4:, to prefabricated shield (2) are installed one by one, prefabricated shield (2) is securely connect with precast beam (1) along bridge；

Step 5: installing protecting wall (3) on precast beam (1) on the inside of prefabricated shield (2)；

Step 6: brushing waterproof membrane on precast beam (1) between prefabricated shield (2) and protecting wall (3), is laid with mortar bed (12), pre-fabricated electric cables slot (4) then are installed on mortar bed (12)；

Step 7: using the side wall of pre-fabricated electric cables slot (4) and prefabricated shield (2) as side template, in pre-fabricated electric cables slot (4) and prefabricated screening Casting concrete between plate (2) is formed straight wall (5).

9. a kind of construction method of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot according to claim 8, Be characterized in that, in the step 1 pre-fabricated electric cables slot (4) production method the following steps are included:

Step 1: making mold, mold is assembled in workshop, then checks the size of mold；

Step 2: longitudinal reinforcement is placed in the locating slot of mold, transverse steel is then placed according to the locating notch of mold, The infall of longitudinal reinforcement and transverse steel is welded to connect, and obtains steel reinforcement cage；

Step 3: steel reinforcement cage is placed on shaking platform, the casting concrete in shaking platform, to not steeped in concrete Shaking platform is closed when foam；

Step 4: removing mold after concrete curing is qualified.

10. a kind of construction method of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot according to claim 8, It is characterized in that: after the step 7, using the side wall of pre-fabricated electric cables slot (4) and protecting wall (3) as side template, in pre-fabricated electric cables slot (4) signal of communication slot (11) bottom casting concrete reserved between protecting wall (3) obtains signal of communication trough floor (13).

Technical field

The present invention relates to high-speed railway bridge floor architecture technical field, specially a kind of high-speed irons based on pre-fabricated electric cables slot Road bridge system structure and its construction method.

Background technique

As shown in Figure 1, usually precast beam is to cast-in-place A, B two in traditional High-speed Railway Bridges beam section bridge deck structure The pre-buried beam steel in the position of road straight wall, the pre-buried beam steel connect to form entirety with straight wall reinforcing bar, then cast-in-place A, B twice straight wall Form cable trough.But in the erection engineering of precast beam, bridge floor needs traveling beam car, the pre-buried beam steel of B straight wall position Beam car is hindered to pass through, beam car needs to flatten the exposed parts of pre-buried beam steel before passing through, and waiting again will be pre- after having set up beam Bury beam steel recovery.The construction method exists certain insufficient: (1) beam car rolls pre-buried beam steel repeatedly, reinforcing bar can be made to generate Fatigue and partial injury, influence structural life-time；(2) beam car rolls pre-buried beam steel, unfavorable to beam car traffic safety；(3) Efficiency is extremely low when manually bending pre-buried beam steel；(4) the form of construction work construction efficiency of cast-in-place straight wall is low, concrete material transport, Template installation etc. is both needed to manual work, is unfavorable for mechanization of building operation, product quality is also uncontrollable.

Summary of the invention

The purpose of the present invention is to provide a kind of high-speed railway bridge floor architectures and its construction party based on pre-fabricated electric cables slot Method, when solving conventional high rate railway deck road section surface structure construction cast-in-place twice straight wall as cable trough there are beam cars repeatedly Pre-buried beam steel is rolled, reinforcing bar can be made to generate fatigue and partial injury, influence structural life-time；Beam car rolls pre-buried beam steel, It is unfavorable to beam car traffic safety；Efficiency is extremely low when manually bending pre-buried beam steel；Efficiency pole when manually bending pre-buried beam steel It is low；The form of construction work construction efficiency of cast-in-place straight wall is low, and concrete material transport, template installation etc. is both needed to manual work, is unfavorable for Mechanization of building operation, product quality also uncontrollable technical problem.

The high-speed railway bridge floor tying based on pre-fabricated electric cables slot that in order to solve the above-mentioned technical problems, the present invention provides a kind of Structure, including precast beam, prefabricated shield and protecting wall, the prefabricated shield along bridge to direction be arranged in precast beam edge and It is arranged along direction across bridge direction interval, the protecting wall further includes section in U along the inside that prefabricated shield is arranged in direction along bridge The pre-fabricated electric cables slot of shape, the pre-fabricated electric cables slot is arranged between prefabricated shield and protecting wall along bridge to direction, described prefabricated The groove for pouring straight wall is formed between cable trough and prefabricated shield.

Preferably, signal of communication slot is reserved between the pre-fabricated electric cables slot and protecting wall.

It preferably, further include covering the cover board closed between pre-fabricated electric cables slot and protecting wall, close to prefabricated on the protecting wall The side of cable trough is equipped with boss, and the cover plate lid is closed between the top and boss of pre-fabricated electric cables slot.

Preferably, position corresponding with prefabricated shield and the interior position corresponding with protecting wall of precast beam in the precast beam It sets and is respectively arranged with beam body steel hoop, the beam body steel hoop is arranged along direction across bridge direction interval, the beam body ring steel Muscle includes the lower half portion being embedded in precast beam and the exposed top half outside precast beam.

Preferably, shield steel hoop is embedded in the prefabricated shield, the shield steel hoop is along direction across bridge direction Interval setting, the shield steel hoop includes the lower half portion being embedded in prefabricated shield and exposed upper outside prefabricated shield Half part, the top half of the shield steel hoop are inserted between adjacent beam body steel hoop, and shield connects reinforcing bar along suitable Bridge to direction pass through beam body steel hoop and shield steel hoop, and with the top half of beam body steel hoop, shield ring steel The top half drawknot of muscle, and then prefabricated shield is connect with precast beam.

Preferably, the protecting wall is cast-in-place concrete structure, and the protecting wall is interior to be embedded with protection to direction along bridge Wall reinforcing bar, the protecting wall reinforcing bar pass through beam body steel hoop top half and with beam body steel hoop drawknot.

Preferably, beam body longitudinal reinforcement is additionally provided in the precast beam, the beam body longitudinal reinforcement is worn along bridge to direction It is located in the lower half portion of beam body steel hoop.

In addition, the construction method of the present invention also provides a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot, The following steps are included:

Step 1: production mold, casting concrete obtains pre-fabricated electric cables slot in a mold, after conserving qualification and reaching demoulding condition Form removal；

Step 2: production cover board；

Step 3: the beam face absolute altitude of review precast beam, is higher by beam face part and cuts, lower portions adjustment, on precast beam edge edge Suitable bridge is to direction setting-out and bullet draws the line of ink marker；

Step 4:, to prefabricated shield is installed one by one, prefabricated shield is securely connect with precast beam along bridge；

Step 5: installing protecting wall on the precast beam on the inside of prefabricated shield；

Step 6: brushing waterproof membrane on precast beam between prefabricated shield and protecting wall, is laid with mortar bed, then in mortar Pre-fabricated electric cables slot is installed on bed course；

Step 7: being poured between pre-fabricated electric cables slot and prefabricated shield using the side wall of pre-fabricated electric cables slot and prefabricated shield as side template Concrete is built, straight wall is formed.

Preferably, in the step 1 pre-fabricated electric cables slot production method the following steps are included:

Step 1: making mold, mold is assembled in workshop, then checks the size of mold；

Step 2: longitudinal reinforcement is placed in the locating slot of mold, transverse steel is then placed according to the locating notch of mold, The infall of longitudinal reinforcement and transverse steel is welded to connect, and obtains steel reinforcement cage；

Step 3: steel reinforcement cage is placed on shaking platform, the casting concrete in shaking platform, to not steeped in concrete Shaking platform is closed when foam；

Step 4: removing mold after concrete curing is qualified.

Preferably, after the step 7, using the side wall of pre-fabricated electric cables slot and protecting wall as side template, in pre-fabricated electric cables slot The signal of communication trench bottom casting concrete reserved between protecting wall obtains signal of communication trough floor.

Compared with prior art, it the features of the present invention and has the beneficial effect that

(1) the pre-fabricated electric cables slot that the present invention is in U-shape using section substitutes cast-in-place twice straight wall, prefabricated shield and protecting wall it Between precast beam in do not need pre-buried beam steel, improve the traffic safety of beam car, guarantee the service life of structure, improve construction effect Rate.

(2) pre-fabricated electric cables slot installation method of the invention is simple, needs not rely on the embedded bar in precast beam to connect, It only needs to be laid with bedding mortar on precast beam surface, then pre-fabricated electric cables slot is placed on bed course, construction method is simple, improves Construction efficiency.

(3) present invention pours straight wall using the side wall of prefabricated shield and pre-fabricated electric cables as template, reduces construction formwork Cost input improves construction efficiency.

(4) pre-fabricated electric cables slot of the invention is batch production processing, and do mechanization operation can accelerate construction progress, while cable The construction quality of slot is easier to control.

(5) present invention passes through the exposed top half and beam body ring steel of shield steel hoop using precast beam longitudinal reinforcement The exposed top half of the muscle and exposed top half of the top half exposed with shield steel hoop, beam body steel hoop is drawn Knot, so that prefabricated shield and precast beam securely be connected, is connected firmly, and construction efficiency is higher using this connection type.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of high-speed railway bridge surface structural cable slot traditional method.

Fig. 2 is the schematic diagram of the high-speed railway bridge floor architecture of the invention based on pre-fabricated electric cables slot.

Fig. 3 is the connection schematic diagram of prefabricated shield and precast beam.

Fig. 4 is the connection schematic diagram of protecting wall and precast beam.

Attached drawing mark: the prefabricated shield of 1- precast beam, 2-, 3- protecting wall, 4- pre-fabricated electric cables slot, 5- straight wall, 6- beam body annular Reinforcing bar, 7- beam body longitudinal reinforcement, 8- shield steel hoop, 9- shield connect reinforcing bar, 10- protecting wall reinforcing bar, 11- signal of communication Slot, 12- mortar bed, 13- signal of communication trough floor, 14- cover board, 15- boss.

Specific embodiment

For realize the present invention technological means, character of innovation, reach purpose and effect is easy to understand, below to Invention further illustrates.

The embodiment recorded herein is specific specific embodiment of the invention, for illustrating design of the invention, Be it is explanatory and illustrative, should not be construed as the limitation to embodiment of the present invention and the scope of the invention.Except what is recorded herein Outside embodiment, those skilled in the art can also based on the claim of this application book and specification disclosure of that using aobvious and The other technical solutions being clear to, these technical solutions include using any obvious to making for the embodiment recorded herein The technical solution of substitutions and modifications.

In the description of the present invention, it should be noted that term " on ", "lower", "inner", "outside" " front end ", " rear end ", The orientation or positional relationship of the instructions such as " both ends ", " one end ", " other end " is to be based on the orientation or positional relationship shown in the drawings, only It is that for the convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must have specifically Orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " the Two " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set Be equipped with ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, may be a detachable connection or one Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition State the concrete meaning of term in the present invention.

It is as shown in figs. 2 to 4 a kind of high-speed railway bridge floor architecture based on pre-fabricated electric cables slot, including precast beam 1, prefabricated The pre-fabricated electric cables slot 4 that shield 2, protecting wall 3 and section are in U-shape.Prefabricated shield 2 is along the side that precast beam 1 is arranged in direction along bridge Edge and it is arranged along direction across bridge direction interval, protecting wall 3 is along the inside that prefabricated shield 2 is arranged in direction along bridge.Pre-fabricated electric cables Slot 4 is arranged between prefabricated shield 2 and protecting wall 3 along bridge to direction, is formed and is poured between pre-fabricated electric cables slot 4 and prefabricated shield 2 Build the groove of straight wall 5.In order to classify different cables, facilitate maintenance, the present invention is also in pre-fabricated electric cables slot 4 and protection Signal of communication slot 11 is reserved between wall 3.Communicaton and signal cable is placed in signal of communication slot 11.

It is equipped with cover board 14 between pre-fabricated electric cables slot 4 and protecting wall 3, is equipped on protecting wall 3 close to the side of pre-fabricated electric cables slot 4 Boss 15, the lid of cover board 14 close between the top and boss 15 of pre-fabricated electric cables slot 4.

Position corresponding with prefabricated shield 2 and the interior position corresponding with protecting wall 3 of precast beam 1 are set respectively in precast beam 1 It is equipped with beam body steel hoop 6, beam body steel hoop 6 is arranged along direction across bridge direction interval, and beam body steel hoop 6 is pre- including being embedded in Lower half portion and the exposed top half outside precast beam 1 in beam 1 processed.

Shield steel hoop 8 is embedded in prefabricated shield 2, shield steel hoop 8 is arranged along direction across bridge direction interval, shield Steel hoop 8 includes being embedded in the lower half portion in prefabricated shield 2 and the exposed top half outside prefabricated shield 2, shield ring The top half of shape reinforcing bar 8 is inserted between adjacent beam body steel hoop 6, and shield connects reinforcing bar 9 and passes through beam to direction along bridge Body steel hoop 6 and shield steel hoop 8, and the upper half with the top half of beam body steel hoop 6, shield steel hoop 8 Divide drawknot, and then prefabricated shield 2 is connect with precast beam 1, prefabricated shield 2 uses above-mentioned connection type with precast beam 1, guarantees pre- The connection of shield 2 processed and precast beam 1 is more firm, will not fall off phenomenon.And prefabricated shield 2 is more easier to install.

Protecting wall 3 is cast-in-place concrete structure, and protecting wall 3 is interior to be embedded with protecting wall reinforcing bar 10 to direction along bridge, is protected Wall reinforcing bar 10 pass through beam body steel hoop 6 top half and with 6 drawknot of beam body steel hoop.

Beam body longitudinal reinforcement 7 is additionally provided in precast beam 1, beam body longitudinal reinforcement 7 is threaded through beam body annular to direction along bridge In the lower half portion of reinforcing bar 6.

The construction method of the above-mentioned high-speed railway bridge floor architecture based on pre-fabricated electric cables slot the following steps are included:

Step 1: production mold, assembles mold in workshop, the size of mold is then checked.Longitudinal reinforcement is placed on mould In the locating slot of tool, transverse steel, the infall weldering of longitudinal reinforcement and transverse steel are then placed according to the locating notch of mold It connects in succession, obtains steel reinforcement cage.Steel reinforcement cage is placed on shaking platform, the casting concrete in shaking platform, in concrete Do not occur closing shaking platform when foam.Mold is removed after concrete curing is qualified.Casting concrete obtains prefabricated in a mold Cable trough 4, maintenance is qualified and reaches form removal after demoulding condition.

Step 2: production cover board 14.

Step 3: the beam face absolute altitude of review precast beam 1, is higher by beam face part and cuts, lower portions are adjusted using mortar, In The suitable bridge in 1 edge of precast beam edge is to direction setting-out and bullet draws the line of ink marker.Straight line location presses every 4m according to every 8 meters of points, 3 in Curve Segment One point carries out setting-out, and after setting-out, bullet draws the line of ink marker, and strict control shield is installed linear.

Step 4: prefabricated shield 2 is transported using existing sidewalk to construction point by haulage vehicle, installation using cantilever crane into The position of row installation, installation uses M10 mortar levelling bridge floor.After prefabricated shield 2 is had good positioning, shield connect reinforcing bar 9 along bridge to Direction pass through beam body steel hoop 6 and shield steel hoop 8, and with the top half of beam body steel hoop 6, shield steel hoop 8 top half drawknot and firm welding, and then prefabricated shield 2 is securely connect with precast beam 1.Along pre- to installation one by one along bridge Shield 2 processed.As shown in figure 3, penetrating 6 shield connection reinforcing bars 9.

Step 5: installing protecting wall 3 on the precast beam 1 of prefabricated 2 inside of shield.Protecting wall 3 is preferably existing in the present invention Pouring concrete structure.The construction method of protecting wall 3 first carries out setting-out and the bullet stroke line of ink marker, according to design position before specially constructing Dabbing is carried out to beam face within the scope of the line of ink marker.Then beam body longitudinal reinforcement 7 is installed, by beam body longitudinal reinforcement 7 and beam body steel hoop 6 Exposed top half binds consolidation.Template is set up, template uses set shaped steel formwork, and the brushing release agent on the inside of steel form mixes Solidifying soil is slowly put to template using chute, pouring molding.

Step 6: brushing waterproof membrane on precast beam 1 between prefabricated shield 2 and protecting wall 3, is laid with mortar bed 12, Then pre-fabricated electric cables slot 4 is installed on mortar bed 12.Preferably using spraying equipment by coating even application in substrate surface, Metal gullet plate can also be used, coating is uniformly painted on substrate surface.2 progress should be divided when brushing, to prevent bubble to be stored in In film.The film for scratching a layer thickness 0.2mm or so on basal plane using plate for the first time, makes every effort to consistency of thickness, and same layer applies Film successively to take a batch width be preferably 30-50mm, construction joint should be noted that protection, and overlapping slit width should be greater than 100mm, connect Tu Qianying by its It is clean to get rid of raft surface treatment.It carries out second using metal gullet plate in 1~2 hour to scratch, direction is scraped in painting should be with first It is perpendicular that direction is scraped in painting, and two coating film overall thickness are not less than 2.0mm.When pouring mortar bed 12, construction equipment, material must be light It hangs and puts down gently, the waterproof layer laid of forbidding to damage.Mortar bed 12 should be laid with uniformly, measure extension after reaching requirement thickness Then line installs pre-fabricated electric cables slot 4, finally 1 sand for surface of the precast beam slurry between pre-fabricated electric cables slot 4 and prefabricated shield 2 is looked for It is flat.

Step 7: using the side wall of pre-fabricated electric cables slot 4 and prefabricated shield 2 as side template, in pre-fabricated electric cables slot 4 and prefabricated shield Casting concrete between 2 forms straight wall 5.The construction method of straight wall 5 is specially that straight wall 5 is first bound when installing prefabricated shield 2 Embedded bar after pre-fabricated electric cables slot 4 is installed, pours straight wall as side template using the side wall of pre-fabricated electric cables slot 4 and prefabricated shield 2 5, it carries out vibrating as required and prearrangement of deformation amount stitches, plastering is carried out at the top of straight wall 5 and receives light.

Step 8: using the side wall of pre-fabricated electric cables slot 4 and protecting wall 3 as side template, pre-fabricated electric cables slot 4 and protecting wall 3 it Between reserve 11 bottom casting concrete of signal of communication slot obtain signal of communication trough floor 13.The thickness of signal of communication trough floor 13 It cannot be less than 40mm.Signal of communication trough floor 13 is stitched along bridge to direction prearrangement of deformation amount, is applied in deformation joint using polyurethane water-proof Deformation joint seam is tamped, fills up, must not pollute pre-fabricated electric cables slot 4 and precast beam 1 by material.The surface of signal of communication trough floor 13 should be put down It is whole, flowing water is unobstructed.

Above embodiment be only preferred embodiments of the present invention will be described, not to the scope of the present invention into Row limits, and without departing from the spirit of the design of the present invention, those of ordinary skill in the art do technical solution of the present invention Various changes and improvements out should all be fallen into the protection scope that claims of the present invention determines.