CN103276663A

CN103276663A - Method for manufacturing assembled integral plate for reinforced concrete slab bridge

Info

Publication number: CN103276663A
Application number: CN2013102010215A
Authority: CN
Inventors: 刘均利
Original assignee: Guilin University of Technology
Current assignee: Suzhou Sanmu Intellectual Property Service Co.,Ltd.
Priority date: 2013-05-28
Filing date: 2013-05-28
Publication date: 2013-09-04
Anticipated expiration: 2033-05-28
Also published as: CN103276663B

Abstract

The invention discloses a method for manufacturing an assembled integral plate for a reinforced concrete slab bridge. The method comprises the following steps that prefabricated reinforced concrete plates are mounted, a construction groove of a wet joint is formed between two adjacent prefabricated reinforced concrete plates, rectangular stirrups and U-shaped connecting reinforcements are bound together, then longitudinal construction reinforcements are inserted into the rectangular stirrups and the U-shaped connecting reinforcements, the longitudinal construction reinforcements, the rectangular stirrups and the U-shaped connecting reinforcements form a reinforcement framework in a binding and connecting mode, UEA shrinkage-compensating concrete is poured into the construction grooves of the wet joints, moisture preservation and maintenance are carried out on the poured UEA shrinkage-compensating concrete for at least 14 days, and therefore the assembled integral plate for the reinforced concrete slab bridge is obtained. The method integrates the advantages of a prefabricating and assembling type construction method which has the advantages of being high in speed, low in cost and excellent in force bearing performance of an overall slab bridge, the manufactured plate is good in overall performance, the situation that a single plate bears force can be effectively avoided, later cost of maintenance and maintenance and reinforcement is saved, and construction quality is guaranteed.

Description

The preparation method that is used for the assembled integral plate of steel concrete slab bridge

Technical field

The invention belongs to technical field of structural engineering, particularly a kind of preparation method of the assembled integral plate for the steel concrete slab bridge, institute's making sheet is applicable to that high-grade highway strides the board-like structures of steel concrete in 5 ~ 10 meters scopes in footpath.

Background technology

Over nearly 20 years, the high-grade highway construction engineering day by day increases, and the key of bridge engineering highway construction and difficult point are striden the large percentage that footpath bridge (single hole stride footpath 5 ~ 10 meters) accounts for bridge quantity in that the route total kilometrage is medium and small.

In bridge on highway, 5 ~ 10 meters bridges of striding the footpath have 2 kinds of implementation methods usually: one is the hinged slab bridge of steel concrete assembling, carry out computational analysis by the hinged theory of plane leverage, in the use, particularly damage phenomenon easily at the seam of the hinge between ubiquity plate and the plate under the overload situation, cause the veneer stressing conditions to take place, influenced supporting capacity and the safe operation of bridge, its maintenance and reinforcement expense height, the general and often existing traffic of influence of maintenance and reinforcement construction of effect; Another kind is the cast-in-situ steel reinforced concrete monolithic concrete plate bridge, for avoiding the veneer stressing conditions to take place, there is the footpath bridge of striding of 5 ~ 10 meters of some areas speedways to begin to adopt the cast-in-situ steel reinforced concrete monolithic concrete plate bridge at present, cast-in-situ steel reinforced concrete monolithic concrete plate bridge good mechanical properties, in the use the veneer stressing conditions can not appear, but because cast-in-place method is adopted in construction, support, the template amount of expending is big, and cost is higher, and can not realize top and the bottom parallelism structural construction, duration is longer, in addition, 5 ~ 10 meters bridge bridge types of striding the footpath are arranged obedience route trend usually in the highway engineering, often are arranged to skew bridge, and the width of bridge on highway is generally between 12m ~ 20m at present, width has been far longer than span, belongs to wide bridge, when the gradient of wide bridge during greater than 30 °, as adopt the cast-in-situ concrete monolithic concrete plate bridge, occur the end reaction inequality easily, acute angle place bearing comes to nothing, phenomenons such as base plate crack, maintenance and renovation is very difficult, influences bridge durability and functional performance.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, a kind of preparation method of the assembled integral plate for the steel concrete slab bridge is provided.

Concrete steps are:

(1) precast rc slab is installed, form the structure groove of wet seam between two contiguous prefabricated armored concrete slabs, the height of wet seam is 15 ~ 18 centimetres, the top of wet seam flushes with the top of precast rc slab, the two limbs of the openend of the inner pre-buried U-shaped connecting reinforcement in the position that the side of precast rc slab contacts with wet seam, the closing end that the U-shaped connecting reinforcement stretches out precast rc slab extend into wet seam inside, closed end position at the U-shaped connecting reinforcement that is embedded in adjacent two precast rc slab inside arranges rectangle hoop, at U-shaped connecting reinforcement and rectangle hoop coincidence zone the longitudinal structure reinforcing bar is set, the longitudinal structure reinforcing bar inserts rectangle hoop and U-shaped connecting reinforcement.

Described precast rc slab is the Filled Rectangle plate, its width depends on the circumstances, when precast rc slab is side plate, its width equals a lane width and adds that the anticollision barrier width deducts 1/2nd of a wet joint gap again, when precast rc slab is middle plate, its width equals the width that a lane width deducts wet seam.

Described wet seam is parallel with the direction of vertically namely driving a vehicle, distance between adjacent two wet seams is a lane width, the width of wet seam is 50 centimetres, wet seam adopts the UEA expansive concrete to build, the UEA expansive concrete joins the concrete that makes in the cement concrete for the UEA expansion agent, and wherein the UEA expansion agent accounts for 8 ~ 12% of the total cement weight of UEA expansive concrete.

The length that described U-shaped connecting reinforcement is embedded in the two limbs of openend in the precast rc slab is 30 centimetres, the distance that the closing end that the U-shaped connecting reinforcement stretches out precast rc slab extend into wet seam inside is 24 centimetres, the direction spacing of vertically namely driving a vehicle of U-shaped connecting reinforcement is 10 centimetres, U-shaped connecting reinforcement is that diameter is that 12 millimeters and strength grade are the notched bars of HRB335 or HRB400, and the direction spacing of vertically namely driving a vehicle of rectangle hoop equals the direction spacing of vertically namely driving a vehicle of U-shaped connecting reinforcement.

Described rectangle hoop and longitudinal structure reinforcing bar all are that diameter is that 12 millimeters and strength grade are the notched bars of HRB335.

(2) with rectangle hoop and the colligation of U-shaped connecting reinforcement together, then the longitudinal structure reinforcing bar is inserted rectangle hoop and U-shaped connecting reinforcement, and longitudinal structure reinforcing bar and rectangle hoop and U-shaped connecting reinforcement are connected to form cage of reinforcement by colligation; Again the UEA expansive concrete is built the structure groove into wet seam, to build into the UEA expansive concrete carry out moisture-keeping maintaining and be no less than 14 days, namely make the assembled integral plate for the steel concrete slab bridge.

Method of the present invention compared with prior art has the following advantages:

(1) the inventive method combines that prefabricated assembled job practices speed is fast, cost is low and the good advantage of whole slab bridge stress performance.

The simple structure of the assembled integral plate that is used for the steel concrete slab bridge that (2) the inventive method is made, possess the advantage of cast-in-place whole slab bridge, overall performance is good, can avoid the veneer stressing conditions to take place effectively, save maintenance and the maintenance and reinforcement expense in later stage, and construction quality is guaranteed.

When (3) being applied to bridges in highway engineering, can having prefabricated slab bridge concurrently and can realize top and the bottom parallelism structural construction, the duration is short and cast-in-place monolithic concrete plate bridge stress performance is superior, the advantage that veneer is subjected to force phenomenon can not occur.

Description of drawings

Fig. 1 for the made assembled integral plate for the steel concrete slab bridge of the present invention laterally namely perpendicular to the direction of traffic structural representation.

Fig. 2 for before two adjacent precast rc slabs are installed among the present invention laterally namely perpendicular to the generalized section of direction of traffic.

Fig. 3 is the reinforcing bar plane structure schematic diagram of the wet seam of the made assembled integral plate for the steel concrete slab bridge of the present invention.

Fig. 4 connects the local enlarged diagram of structure for the reinforcing bar of the wet seam of the made assembled integral plate for the steel concrete slab bridge of the present invention.

Fig. 5 is the planar configuration schematic diagram of the made assembled integral plate for the steel concrete slab bridge of the present invention.

Mark among the figure: 1-precast rc slab; The 2-seam that wets; 3-U shape connecting reinforcement; The 4-rectangle hoop; 5-longitudinal structure reinforcing bar; 6-seat supports line; The 7-direction of vertically namely driving a vehicle.

The specific embodiment

Embodiment:

(1) precast rc slab 1 is installed, form the structure groove of wet seam 2 between two contiguous prefabricated armored concrete slabs 1, the height of wet seam 2 is 15 centimetres, the top of wet seam 2 flushes with the top of precast rc slab 1, the two limbs of the openend of the inner pre-buried U-shaped connecting reinforcement 3 in the position that the side of precast rc slab 1 contacts with wet seam 2, the closing end that U-shaped connecting reinforcement 3 stretches out precast rc slab 1 extend into wet seam 2 inside, closed end position at the U-shaped connecting reinforcement 3 that is embedded in adjacent two precast rc slab 1 inside arranges rectangle hoop 4, at U-shaped connecting reinforcement 3 and rectangle hoop 4 coincidence zones longitudinal structure reinforcing bar 5 is set, longitudinal structure reinforcing bar 5 inserts rectangle hoops 4 and U-shaped connecting reinforcements 3.

Described precast rc slab 1 is the Filled Rectangle plate, and when precast rc slab 1 was side plate, its width was 3.5 meters, and when precast rc slab 1 was middle plate, its width was 3 meters.

Described wet seam 2 is parallel with the direction 7 of vertically namely driving a vehicle, distance between adjacent two wet seams 2 is a lane width, the width of wet seam 2 is 50 centimetres, wet seam 2 adopts the UEA expansive concrete to build, the UEA expansive concrete joins the concrete that makes in the cement concrete for the UEA expansion agent, and wherein the UEA expansion agent accounts for 10% of the total cement weight of UEA expansive concrete.

The length that described U-shaped connecting reinforcement 3 is embedded in the two limbs of openend in the precast rc slab 1 is 30 centimetres, the distance that the closing end that U-shaped connecting reinforcement 3 stretches out precast rc slab 1 extend into wet seam 2 inside is 24 centimetres, direction 7 spacings of vertically namely driving a vehicle of U-shaped connecting reinforcement 3 are 10 centimetres, U-shaped connecting reinforcement 3 is that diameter is that 12 millimeters and strength grade are the notched bars of HRB400, and direction 7 spacings of vertically namely driving a vehicle of rectangle hoop 4 equal direction 7 spacings of vertically namely driving a vehicle of U-shaped connecting reinforcement 3.

Described rectangle hoop 4 and longitudinal structure reinforcing bar 5 all are that diameter is that 12 millimeters and strength grade are the notched bars of HRB335.

(2) with rectangle hoop 4 and 3 colligations of U-shaped connecting reinforcement together, then longitudinal structure reinforcing bar 5 is inserted rectangle hoops 4 and U-shaped connecting reinforcements 3, and longitudinal structure reinforcing bar 5 and rectangle hoop 4 and U-shaped connecting reinforcement 3 are connected to form cage of reinforcement by colligation; Again the UEA expansive concrete is built the structure groove into wet seam 2, to build into the UEA expansive concrete carried out moisture-keeping maintaining 14 days, namely make the assembled integral plate for the steel concrete slab bridge.

The described specific embodiment of this specific embodiment only is that the present invention's spirit is illustrated; those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the protection domain that appended claims limits.

Claims

1. preparation method that is used for the assembled integral plate of steel concrete slab bridge is characterized in that concrete steps are:

(1) precast rc slab is installed, form the structure groove of wet seam between two contiguous prefabricated armored concrete slabs, the height of wet seam is 15 ~ 18 centimetres, the top of wet seam flushes with the top of precast rc slab, the two limbs of the openend of the inner pre-buried U-shaped connecting reinforcement in the position that the side of precast rc slab contacts with wet seam, the closing end that the U-shaped connecting reinforcement stretches out precast rc slab extend into wet seam inside, closed end position at the U-shaped connecting reinforcement that is embedded in adjacent two precast rc slab inside arranges rectangle hoop, at U-shaped connecting reinforcement and rectangle hoop coincidence zone the longitudinal structure reinforcing bar is set, the longitudinal structure reinforcing bar inserts rectangle hoop and U-shaped connecting reinforcement;

Described precast rc slab is the Filled Rectangle plate, its width depends on the circumstances, when precast rc slab is side plate, its width equals a lane width and adds that the anticollision barrier width deducts 1/2nd of a wet joint gap again, when precast rc slab is middle plate, its width equals the width that a lane width deducts wet seam;

Described wet seam is parallel with the direction of vertically namely driving a vehicle, distance between adjacent two wet seams is a lane width, the width of wet seam is 50 centimetres, wet seam adopts the UEA expansive concrete to build, the UEA expansive concrete joins the concrete that makes in the cement concrete for the UEA expansion agent, and wherein the UEA expansion agent accounts for 8 ~ 12% of the total cement weight of UEA expansive concrete;

The length that described U-shaped connecting reinforcement is embedded in the two limbs of openend in the precast rc slab is 30 centimetres, the distance that the closing end that the U-shaped connecting reinforcement stretches out precast rc slab extend into wet seam inside is 24 centimetres, the direction spacing of vertically namely driving a vehicle of U-shaped connecting reinforcement is 10 centimetres, U-shaped connecting reinforcement is that diameter is that 12 millimeters and strength grade are the notched bars of HRB335 or HRB400, and the direction spacing of vertically namely driving a vehicle of rectangle hoop equals the direction spacing of vertically namely driving a vehicle of U-shaped connecting reinforcement;

Described rectangle hoop and longitudinal structure reinforcing bar all are that diameter is that 12 millimeters and strength grade are the notched bars of HRB335;