CN105113430A - Maintenance and reinforcement method for hinge joints of simply supported slabs and beams - Google Patents
Maintenance and reinforcement method for hinge joints of simply supported slabs and beams Download PDFInfo
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Abstract
The invention discloses a maintenance and reinforcement method for the hinge joints of simply supported slabs and beams, and relates to the technical field of maintenance and reinforcement for bridge engineering. The maintenance and reinforcement method disclosed by the invention comprises the following steps: a slab joint or hinge joint clearing step, an edge sealing step, a slab joint bottom sealing step, a glue injection tube and measurement tube insertion step, a sealing step, a primary glue injection step, a secondary glue injection step, and a detaching and clearing step. The method is capable of maintaining and reinforcing the hinge joints under the condition of no traffic interruption; and moreover, the maintenance and reinforcement method disclosed by the invention is short in construction period, convenient to construct, and free from influencing road traffic during a construction process.
Description
Technical field
The present invention relates to bridge engineering Reinforcement Technology field, more specifically to a kind of freely-supported plate-girder hinge seam maintenance reinforcement method.
Background technology
Along with the fast development of China's economic construction and communications and transportation, the bridge construction as important infrastructure achieves the achievement attracted people's attention.Nearly ten years, although brilliant period has been stepped in China's Large Span Bridges construction, its construction level has also ranked among the international rank of advanced units, and Short/Medium Span Bridge still occupies very consequence in highway in China bridge construction.Especially in high-grade highway, assembling plate-girder because of have structure simple, stressed clear and definite, deadweight is comparatively light, by material economy, convenient and quick construction and can the plurality of advantages such as batch production concentration pre-casting and being widely used in enormous quantities.
But, As time goes on, due to the defect that design, construction link exist, under the acting in conjunction of natural environment, the ever-increasing traffic volume and the factor such as vehicular load and material self-characteristic, generally there is the diseases such as base plate longitudinal crack, hinge seam destroys, bridge floor ftractures continuously in a large amount of simply supported slab beam bridge.
At present mainly following measures is existed to the maintenance and reinforcement of hinge seam:
(1) bridge floor strengthening course reinforcing method
Bridge floor strengthening course reinforcing method needs first milling deck paving, cut the loose structure of concrete pavement and hinge seam, then hole at the end face of girder, the bar dowel of certain length is implanted with adhesive, this reinforcing bar top is together with the colligation of deck paving steel mesh reinforcement, play shearing strength at intersection intermal force, deck paving and girder are combined as a whole, and pave-load layer effectively participates in main beam stress.Implant bar dowel (door muscle) along hinge tape edge edge, and overlap alternately, rearrange cross wise reinforcement simultaneously in hinge seam, to strengthen hinge seam pass force crossly, hinge sews cloth muscle as shown in Figure 1.
Bridge floor strengthening course reinforcing method is mainly applicable to cut with scissors the plate girder bridge that seam destruction was even lost efficacy, " single slab bearing " situation is very serious.The method can improve the real work performance of hinge seam, recover the Shear transfer ability of hinge seam, improve hollow slab bridge load relieving system, improve hollow slab bridge globality, but long construction period, take up space large, a large amount of human and material resources and financial resources be dropped into, to making a big impact of the existing traffic of bridge floor.
(2) affixing steel plate reinforcement method
Affixing steel plate reinforcement method adopts cementing agent and crab-bolt steel sticking to be anchored in other weak part such as concrete structure tension face or hinge seam, and top and the bottom steel plate bolt is connected, steel plate and concrete structure to be reinforced is made to form entirety, to reach the object improving structural-load-carrying capacity and durability, as shown in Figure 2.
The method have do not change original structure size, little to traffic impact, technically reliable, short-term consolidation effect are good and the advantages such as technical maturity.But affixing steel plate reinforcement method fail closed disease hinge seam leak path, the percolating water of hinge seam is gathered in the top of affixing steel plate, to cause the adhesive failure at steel plate corrosion and anchoring interface, simultaneously also there is Stress resort in the method, anchorage zone bears disadvantageous cutting and draw the limitation such as composite force and easy-to-rust.
(3) external prestressing strengthening method
The method reinforcement mechanism is for cross each plate-girder by prestressed strand upper limb at the bottom of plate, make to be stressed between each plate unanimously, fundamentally counteract transverse bending moment little between hinge seam, simultaneously, between plate with plate, hinged seam becomes plate girder and is connected, Transfer of Shear between single seam is become not only Transfer of Shear but also transmit transverse bending moment, as shown in Figure 3.Thus, improve transverse integral and the rigidity of integral hollow plate girder bridge, each plate can effectively be cooperated mutually, shared external loads.
Apply the plate girder bridge structure of transverse prestress, all used in Japan, Korea S, the U.S., namely plate girder bridge arranges end diaphragm and middle diaphragm, and in Yokogawa plate, puts on prestressed strand to strengthen transverse integral.Therefore, adopt the impaired hinge seam of external prestressing strengthening, there is certain feasibility.Although external prestressing strengthening method improves the globality of slab and girder, for the reinforce treatment of impaired hinge seam, there is following problem:
1. external prestressing strengthening essence is to realize redistribution of internal force, make full bridge structure stressed more even, the increase of lateral stiffness, structure stress system is changed, cause transverse bending moment under cargo effect greatly to increase, thus cause the appearance of longitudinal crack bottom plate-girder;
2. because of the existence of hinge seam structure, there is larger uncertainty in the determination of the important parameters such as the loss of prestress calculating in prestress wire stretch-draw and use procedure, the deflection of prestress wire;
3. external prestressing strengthening technical difficulty is large, and construction technology is loaded down with trivial details, maintenance and reinforcement cost and prestress wire later stage Corrosion Maintenance cost high.
In sum, current hinge seam reinforcing technique, the equal effect playing the real work performance improving hinge seam, but due to will deck paving be cut, long in the Roadway Construction cycle, take up space large, need suspend traffic, road traffic is posed a big pressure, the road that particularly traffic volume such as speedway, major urban arterial highway is huge.
Summary of the invention
For overcoming above-mentioned deficiency of the prior art, the invention provides a kind of freely-supported plate-girder hinge seam maintenance reinforcement method, this method can carry out maintenance and reinforcement to hinge seam under the condition of uninterrupted traffic, and maintenance reinforcement method short construction period of the present invention, easy construction, does not affect road traffic in work progress.
For solving above-mentioned deficiency of the prior art, the present invention is achieved through the following technical solutions:
Freely-supported plate-girder hinge seam maintenance reinforcement method, is characterized in that: its step comprises:
Plate seam or hinge seam cleanup step; At the bottom of bridge, the concrete of plate seam or hinge seam is cleared up;
Edge sealing step: comprise closed beam-ends, namely shut seam is near the end of abutment;
Plate seam underseal closes, and namely uses pressing plate to be close to plate and sews on, and uses pressing article to push down pressing plate both sides and fixes;
Insert injected rubber hose and measuring tube, namely interval 1.8m-2.3m inserts injected rubber hose and measuring tube at plate seam place, and the distance of injected rubber hose distance hinge seam bottom is less than the distance of measuring tube distance hinge seam bottom;
Close, be about to close plug and enter pressing plate and plate-girder back plate connections, make it bond closely knit; Carry out after smearing Post RDBMS 20-28 hour of closed glue
An injecting glue step: adopt JN-G base joint grouting glue, be configured according to A, B two kinds of glue ratio 100:50, and add 20% cement; Configure rear employing glue-injection machine from injected rubber hose pressure injection JN-G casting glue, buret to be measured flows out glue can be stopped injecting glue and close measuring tube, then moves to next injected rubber hose and continues injecting glue, treat that all measuring tubes all have glue and emerge, this hinge seam injecting glue completes, emptying injected rubber hose; Solidify after 1.8-2.2 hour, can carry out
Secondary injecting glue step: glue is configured according to A, B two kinds of glue ratio 100:50; By the glue that configures by glue-injection machine injecting glue from the injected rubber hose of side, observe all the other injected rubber hoses have glue to flow out and colligation process, guarantee that glue fills up hinge seam internal voids, glue perfusion reaches and maintains 0.2MPa pressure 10-20 minute;
Remove cleanup step: after secondary injecting glue completes and glue solidifies, will dismantle pressing article, sawed-off injected rubber hose and measuring tube, complete construction.
Described plate seam or hinge seam cleanup step specifically refer to: adopt artificial chisel except coordinating giant plate seam or hinge seam concrete to be cleared up.
Described closed beam-ends specifically refers to: fill between the plate-girder of abutment end with pin chips, batten at least fills in 3, then blocks, and blowing agent shutoff is used in centre.
Described plate seam underseal closes and specifically refers to: pressing plate adopts soft glass, press strip adopts steel plate strip, soft glass is cut into wide 8-12cm, length is equal to the flat of hinge seam length, and prepare the steel plate strip having anchor hole, be close to by flat and sew on plate, both sides pushed down by steel plate, by expansion bolt by Interal fixation bottom plate-girder.
Described injected rubber hose and measuring tube all adopt diameter to be less than the pvc pipe of plate seam width.
The tensile strength of described closed glue is more than or equal to 20MPa, tensile elastic film amount is more than or equal to 1500MPa, compressive strength is more than or equal to 50MPa, flexural strength is more than or equal to 30MPa and can not is brittle fracture, steel-steel stretching shear strength standard value is more than or equal to 10MPa, and non-volatile content is more than or equal to 99%.
Described JN-G casting glue meets that splitting tensile strength is more than or equal to 7.0MPa, flexural strength is more than or equal to 25MPa, compressive strength is more than or equal to 50MPa, steel-steel stretching shear strength standard value is more than or equal to 10MPa, steel-steel stretching tensile strength is more than or equal to 15MPa, steel-concrete is just drawing adhesion strength to be more than or equal to 2.5MPa and is being concrete cohesional failure, and hardening time is less than or equal to 2.5h.
Compared with prior art, the useful technique effect that the present invention brings shows:
1, this method can carry out maintenance and reinforcement to hinge seam under the condition of uninterrupted traffic, and maintenance reinforcement method short construction period of the present invention, easy construction, does not affect road traffic in work progress, the duration of this method is shorter, do not affect road traffic, easy construction under bridge, all can punish hinge seam, paving layer, consolidation effect is good, compared with before reinforcing, plate-girder globality obtains reinforcement, can effective shared upper load.
This reinforcement means is as shown in table 1 with existing reinforcing technique scheme comparison:
Table 1
2, the hinge seam glue-injection reinforced principle of this method is by hinge seam formation closed cavity, under reserved precession instability, utilizes the mobility that colloid is good, effectively uses high pressure grouting equipment, poured in hinge seam gap, make its diffusion rapidly, condense and solidify.The characteristic of the adhesive property utilizing colloid good, mechanical property and rapid solidification, the connection between the beam slab of fast quick-recovery both sides, improves the shear resistance of hinge seam, has the overall performance of efficient recovery bridge construction.
3, plate seam or the cleaning of hinge seam are the damage situations according to hinge seam, adopt artificial chisel except coordinating giant plate seam or hinge seam concrete to be cleared up, remove the peeling off of web and backplate surface, loosen, honeycomb, corrosion concrete, expose concrete structure surface, and ensure the material affecting injecting glue effect in plate seam and hinge seam without greasy dirt, grease, wax, dust and attachment etc., ensure that hinge seam pouring material and hinge stitch the adhesion strength of both sides concrete surface.
4, close beam-ends, fill between the plate-girder of abutment end with pin chips, firmly dieback.Batten at least fills in 3, then blocks, and centre blowing agent shutoff is tight, avoids glue to ooze out from beam side.
5, interval 1.8m-2.3m inserts injected rubber hose and measuring tube at plate seam place, and the insertion depth of injected rubber hose is greater than the insertion depth of measuring tube.Injected rubber hose is used for injecting glue, and measuring tube measures the height of glue in plate seam, when measuring tube has glue to flow out, illustrates that plate seam colloid reaches design height, can stop injecting glue.
6, with soft glass shut seam bottom surface, and steel plate strip compresses, and is coated with and closes glue, make plate stitch an inner formation closed cavity, under reserved precession instability, utilize the mobility that colloid is good, effective utilization high pressure grouting equipment, is poured in hinge seam gap, makes its diffusion rapidly, condenses and solidify.
7, injecting glue step is divided into an injecting glue and secondary injecting glue, and one time injecting glue fills plate plate bottom about 2/3 height, doubts admittedly carry out secondary injection glue at colloid.Glue will be made to fill plate during second time injecting glue and sew on portion and pave-load layer exists fine cracks, therefore secondary injecting glue needs certain pressure.Injecting glue makes upper cavity can bear larger pressure, so injecting glue carries out at twice for the first time.
accompanying drawing illustrates:
Fig. 1 is the hinge seam bar arrangement drawing of bridge floor strengthening course reinforcing method in background technology;
Fig. 2 is the hinge seam affixing steel plate reinforcement schematic diagram of affixing steel plate reinforcement method in background technology;
Fig. 3 is the external prestressing strengthening schematic diagram of external prestressing strengthening method in background technology;
Fig. 4 is plate of the present invention seam or hinge seam cleaning schematic diagram;
Fig. 5 is that beam-ends of the present invention closes schematic diagram;
Fig. 6 is that plate of the present invention seam underseal closes schematic diagram;
Fig. 7 is injected rubber hose of the present invention, measuring tube buries schematic diagram underground;
Fig. 8 is the structure enlarged diagram of A in Fig. 7 of the present invention;
Fig. 9 is the present invention's first time injecting glue cross sectional representation;
Figure 10 is the present invention's second time injecting glue cross sectional representation.
Detailed description of the invention
Embodiment 1
As a preferred embodiment of the present invention, present embodiment discloses
A kind of freely-supported plate-girder hinge seam maintenance reinforcement method, its step comprises:
Plate seam or hinge seam cleanup step; At the bottom of bridge, the concrete of plate seam or hinge seam is cleared up;
Edge sealing step: comprise closed beam-ends, namely shut seam is near the end of abutment;
Plate seam underseal closes, and namely uses pressing plate to be close to plate and sews on, and uses pressing article to push down pressing plate both sides and fixes;
Insert injected rubber hose and measuring tube, namely interval 1.8m inserts injected rubber hose and measuring tube at plate seam place, and the distance of injected rubber hose distance hinge seam bottom is less than the distance of measuring tube distance hinge seam bottom;
Close, be about to close plug and enter pressing plate and plate-girder back plate connections, make it bond closely knit; The Post RDBMS smearing closed glue carries out for 20 hours afterwards
An injecting glue step: adopt JN-G casting glue, be configured according to A, B two kinds of glue ratio 100:50, and add 20% cement; Configure rear employing glue-injection machine from injected rubber hose pressure injection JN-G casting glue, buret to be measured flows out glue can be stopped injecting glue and close measuring tube, then moves to next injected rubber hose and continues injecting glue, treat that all measuring tubes all have glue and emerge, this hinge seam injecting glue completes, emptying injected rubber hose; Solidify after 1.8 hours, can carry out
Secondary injecting glue step: JN-G casting glue glue is configured according to A, B two kinds of glue ratio 100:50; By the glue that configures by glue-injection machine injecting glue from the injected rubber hose of side, observe all the other injected rubber hoses have glue to flow out and do colligation process, guarantee that glue fills up hinge seam internal voids, glue perfusion reaches and maintains 0.2MPa pressure 10 minutes;
Remove cleanup step: after secondary injecting glue completes and glue solidifies, will dismantle pressing article, sawed-off injected rubber hose and measuring tube, complete construction.
Embodiment 2
As the another preferred embodiment of the present invention, present embodiment discloses
A kind of freely-supported plate-girder hinge seam maintenance reinforcement method, its step comprises:
Plate seam or hinge seam cleanup step: according to the damage situations of hinge seam, adopt artificial chisel except coordinating giant plate seam or hinge seam concrete to be cleared up, and removes the peeling off of web and backplate surface, loosens, honeycomb, corrosion concrete.Expose concrete structure surface, cleaning plate seam or hinge seam interior greasy dirt, grease, wax, dust and attachment etc. affect the material of injecting glue effect;
Edge sealing step: comprise closed beam-ends, plate seam underseal closes, and insert injected rubber hose and measuring tube;
Closed beam-ends refers to be filled between the plate-girder of abutment end with pin chips, firmly dieback, and batten inserts 3, then blocks, and blowing agent shutoff is used in centre;
Plate seam underseal closes specifically acupressure probe and adopts soft glass, press strip adopts steel plate strip, soft glass is cut into wide 8cm, length is equal to the flat of hinge seam length, and prepare the steel plate strip having anchor hole, be close to by flat and sew on plate, both sides pushed down by steel plate, by expansion bolt by Interal fixation bottom plate-girder;
Insertion injected rubber hose and measuring tube refer to the pvc pipe adopting diameter to be less than plate seam width, interval 1.9m inserts injected rubber hose and measuring tube at plate seam place, the distance of injected rubber hose distance hinge seam bottom is less than the distance of measuring tube distance hinge seam bottom, i.e. injected rubber hose distance hinge seam bottom 1cm, measuring tube distance hinge seam bottom 4cm;
Close, adopt JN-F to close glue, in dedicated modulation utensil, in strict accordance with proportioning, bi-component is prepared, manually it is mixed well completely, guarantee the closed glue color and luster for preparing unanimously, stir, workability is good; Ash cutter daub is closed, and firmly must extrude and closed plug is entered glazing bead and plate-girder back plate connections, make it bond closely knit when smearing; Then should puncture compression as met bubble, ensureing dense surface, then answering layering to smear when damaged area is larger.Every layer thickness can not, more than 1cm, be smeared while compacting is levelling, and expansion bolt and injected rubber hose, measuring tube implantation place must be shut, and allow to occur bad sealing phenomenon; Close glue construction solidification and carry out first time injecting glue step afterwards in 20 hours;
Injecting glue step refers to for the first time: injecting glue liquid adopts JN-G(A, B two component modification epoxy resin structure glue) casting glue, according to A, B two kinds of glue ratio 100:50 prepare, and add 20% cement, utilize glue-injection machine from injected rubber hose pressure injection glue after having prepared, first time, injecting glue was without pressure requirements, injecting glue order is carried out to the other end from one end, buret to be measured flows out glue can be stopped injecting glue and close measuring tube, then move to next injected rubber hose and continue injecting glue, treat that all measuring tubes all have glue and emerge, this hinge seam injecting glue completes, start next section of hinge seam injecting glue, last emptying injected rubber hose, after waiting for that first time, injecting glue glue solidified 1.8 hours, second time injecting glue can be carried out,
Second time injecting glue step specifically refers to: second time injecting glue is pressure injecting glue, adopt JN-G casting glue according to A, B two kinds of glue ratio 100:50 prepare, after having prepared from the injected rubber hose of side injecting glue, observe all the other injected rubber hoses and have glue outflow and colligation process, according to theoretical amount, and observe beam-ends and bridge floor situation, if bridge floor has longitudinal joint, then during second time injecting glue, glue can ooze out from crack and can not pressurize, 2 minutes should be waited for, continue injecting glue, guarantee that glue fills up hinge seam internal voids, crannied hinge is not had to stitch for bridge floor, beam-ends should be filled into leak glue or perfusion and reach and 0.2MPa pressure 10 minutes for it,
After treating that secondary injecting glue completes, cut expansion bolt, dismounting steel plate, sawed-off injected rubber hose and measuring tube complete construction.
Embodiment 3
As the another preferred embodiment of the present invention, present embodiment discloses
A kind of freely-supported plate-girder hinge seam maintenance reinforcement method, its step comprises:
Plate seam or hinge seam cleanup step: according to the damage situations of hinge seam, adopt artificial chisel except coordinating giant plate seam or hinge seam concrete to be cleared up, and removes the peeling off of web and backplate surface, loosens, honeycomb, corrosion concrete.Expose concrete structure surface, cleaning plate seam or hinge seam interior greasy dirt, grease, wax, dust and attachment etc. affect the material of injecting glue effect;
Edge sealing step: comprise closed beam-ends, plate seam underseal closes, and insert injected rubber hose and measuring tube;
Closed beam-ends refers to be filled between the plate-girder of abutment end with pin chips, firmly dieback, and batten inserts 4, then blocks, and blowing agent shutoff is used in centre;
Plate seam underseal closes specifically acupressure probe and adopts soft glass, press strip adopts steel plate strip, soft glass is cut into wide 10cm, length is equal to the flat of hinge seam length, and prepare the steel plate strip having anchor hole, be close to by flat and sew on plate, both sides pushed down by steel plate, by expansion bolt by Interal fixation bottom plate-girder;
Insertion injected rubber hose and measuring tube refer to the pvc pipe adopting diameter to be less than plate seam width, interval 2m inserts injected rubber hose and measuring tube at plate seam place, the distance of injected rubber hose distance hinge seam bottom is less than the distance of measuring tube distance hinge seam bottom, i.e. injected rubber hose distance hinge seam bottom 1.5cm, measuring tube distance hinge seam bottom 4.5cm;
Close, adopt JN-F to close glue, in dedicated modulation utensil, in strict accordance with proportioning, bi-component is prepared, manually it is mixed well completely, guarantee the closed glue color and luster for preparing unanimously, stir, workability is good; Ash cutter daub is closed, and firmly must extrude and closed plug is entered glazing bead and plate-girder back plate connections, make it bond closely knit when smearing; Then should puncture compression as met bubble, ensureing dense surface, then answering layering to smear when damaged area is larger.Every layer thickness can not, more than 1cm, be smeared while compacting is levelling, and expansion bolt and injected rubber hose, measuring tube implantation place must be shut, and allow to occur bad sealing phenomenon; Close glue construction solidification and carry out first time injecting glue step afterwards in 24 hours;
Injecting glue step refers to for the first time: injecting glue liquid adopts JN-G(A, B two component modification epoxy resin structure glue) casting glue, according to A, B two kinds of glue ratio 100:50 prepare, and add 20% cement, utilize glue-injection machine from injected rubber hose pressure injection glue after having prepared, first time, injecting glue was without pressure requirements, injecting glue order is carried out to the other end from one end, buret to be measured flows out glue can be stopped injecting glue and close measuring tube, then move to next injected rubber hose and continue injecting glue, treat that all measuring tubes all have glue and emerge, this hinge seam injecting glue completes, start next section of hinge seam injecting glue, last emptying injected rubber hose, after waiting for that first time, injecting glue glue solidified 2 hours, second time injecting glue can be carried out,
Second time injecting glue step specifically refers to: second time injecting glue is pressure injecting glue, adopt JN-G casting glue according to A, B two kinds of glue ratio 100:50 prepare, after having prepared from the injected rubber hose of side injecting glue, observe all the other injected rubber hoses and have glue outflow and colligation process, according to theoretical amount, and observe beam-ends and bridge floor situation, if bridge floor has longitudinal joint, then during second time injecting glue, glue can ooze out from crack and can not pressurize, 3 minutes should be waited for, continue injecting glue, guarantee that glue fills up hinge seam internal voids, crannied hinge is not had to stitch for bridge floor, beam-ends should be filled into leak glue or perfusion and reach and 0.2MPa pressure 15 minutes for it,
After treating that secondary injecting glue completes, cut expansion bolt, dismounting steel plate, sawed-off injected rubber hose and measuring tube complete construction.
Embodiment 4
As the another preferred embodiment of the present invention, present embodiment discloses
A kind of freely-supported plate-girder hinge seam maintenance reinforcement method, its step comprises:
Plate seam or hinge seam cleanup step: according to the damage situations of hinge seam, adopt artificial chisel except coordinating giant plate seam or hinge seam concrete to be cleared up, and removes the peeling off of web and backplate surface, loosens, honeycomb, corrosion concrete.Expose concrete structure surface, cleaning plate seam or hinge seam interior greasy dirt, grease, wax, dust and attachment etc. affect the material of injecting glue effect;
Edge sealing step: comprise closed beam-ends, plate seam underseal closes, and insert injected rubber hose and measuring tube;
Closed beam-ends refers to be filled between the plate-girder of abutment end with pin chips, firmly dieback, and batten inserts 5, then blocks, and blowing agent shutoff is used in centre;
Plate seam underseal closes specifically acupressure probe and adopts soft glass, press strip adopts steel plate strip, soft glass is cut into wide 12cm, length is equal to the flat of hinge seam length, and prepare the steel plate strip having anchor hole, be close to by flat and sew on plate, both sides pushed down by steel plate, by expansion bolt by Interal fixation bottom plate-girder;
Insertion injected rubber hose and measuring tube refer to the pvc pipe adopting diameter to be less than plate seam width, interval 2.3m inserts injected rubber hose and measuring tube at plate seam place, the distance of injected rubber hose distance hinge seam bottom is less than the distance of measuring tube distance hinge seam bottom, i.e. injected rubber hose distance hinge seam bottom 0.9cm, measuring tube distance hinge seam bottom 3.8cm;
Close, adopt JN-F to close glue, in dedicated modulation utensil, in strict accordance with proportioning, bi-component is prepared, manually it is mixed well completely, guarantee the closed glue color and luster for preparing unanimously, stir, workability is good; Ash cutter daub is closed, and firmly must extrude and closed plug is entered glazing bead and plate-girder back plate connections, make it bond closely knit when smearing; Then should puncture compression as met bubble, ensureing dense surface, then answering layering to smear when damaged area is larger.Every layer thickness can not, more than 1cm, be smeared while compacting is levelling, and expansion bolt and injected rubber hose, measuring tube implantation place must be shut, and allow to occur bad sealing phenomenon; Close glue construction solidification and carry out first time injecting glue step afterwards in 28 hours;
Injecting glue step refers to for the first time: injecting glue liquid adopts JN-G(A, B two component modification epoxy resin structure glue) casting glue, according to A, B two kinds of glue ratio 100:50 prepare, and add 20% cement, utilize glue-injection machine from injected rubber hose pressure injection glue after having prepared, first time, injecting glue was without pressure requirements, injecting glue order is carried out to the other end from one end, buret to be measured flows out glue can be stopped injecting glue and close measuring tube, then move to next injected rubber hose and continue injecting glue, treat that all measuring tubes all have glue and emerge, this hinge seam injecting glue completes, start next section of hinge seam injecting glue, last emptying injected rubber hose, after waiting for that first time, injecting glue glue solidified 2.2 hours, second time injecting glue can be carried out,
Second time injecting glue step specifically refers to: second time injecting glue is pressure injecting glue, adopt JN-G casting glue according to A, B two kinds of glue ratio 100:50 prepare, after having prepared from the injected rubber hose of side injecting glue, observe all the other injected rubber hoses and have glue outflow and colligation process, according to theoretical amount, and observe beam-ends and bridge floor situation, if bridge floor has longitudinal joint, then during second time injecting glue, glue can ooze out from crack and can not pressurize, 3 minutes should be waited for, continue injecting glue, guarantee that glue fills up hinge seam internal voids, crannied hinge is not had to stitch for bridge floor, beam-ends should be filled into leak glue or perfusion and reach and 0.2MPa pressure 15 minutes for it,
After treating that secondary injecting glue completes, cut expansion bolt, dismounting steel plate, sawed-off injected rubber hose and measuring tube complete construction.
Claims (7)
1. freely-supported plate-girder hinge seam maintenance reinforcement method, is characterized in that: its step comprises:
Plate seam or hinge seam cleanup step; At the bottom of bridge, the concrete of plate seam or hinge seam is cleared up;
Edge sealing step: comprise closed beam-ends, namely shut seam is near the end of abutment;
Plate seam underseal closes, and namely uses pressing plate to be close to plate and sews on, and uses pressing article to push down pressing plate both sides and fixes;
Insert injected rubber hose and measuring tube, namely interval 1.8m-2.3m inserts injected rubber hose and measuring tube at plate seam place, and the distance of injected rubber hose distance hinge seam bottom is less than the distance of measuring tube distance hinge seam bottom;
Close, be about to close plug and enter pressing plate and plate-girder back plate connections, make it bond closely knit; Carry out after smearing Post RDBMS 20-28 hour of closed glue
An injecting glue step: adopt JN-G base joint grouting glue, be configured according to A, B two kinds of glue ratio 100:50, and add 20% cement; Configure rear employing glue-injection machine from injected rubber hose pressure injection JN-G casting glue, buret to be measured flows out glue can be stopped injecting glue and close measuring tube, then moves to next injected rubber hose and continues injecting glue, treat that all measuring tubes all have glue and emerge, this hinge seam injecting glue completes, emptying injected rubber hose; Solidify after 1.8-2.2 hour, can carry out
Secondary injecting glue step: glue is configured according to A, B two kinds of glue ratio 100:50; By the glue that configures by glue-injection machine injecting glue from the injected rubber hose of side, observe all the other injected rubber hoses have glue to flow out and colligation process, guarantee that glue fills up hinge seam internal voids, glue perfusion reaches and maintains 0.2MPa pressure 10-20 minute;
Remove cleanup step: after secondary injecting glue completes and glue solidifies, will dismantle pressing article, sawed-off injected rubber hose and measuring tube, complete construction.
2. freely-supported plate-girder hinge seam maintenance reinforcement method as claimed in claim 1, is characterized in that: described plate seam or hinge seam cleanup step specifically refer to: adopt artificial chisel except coordinating giant plate seam or hinge seam concrete to be cleared up.
3. freely-supported plate-girder hinge seam maintenance reinforcement method as claimed in claim 1, it is characterized in that: described closed beam-ends specifically refers to: fill between the plate-girder of abutment end with pin chips, batten at least fills in 3, then blocks, blowing agent shutoff is used in centre.
4. freely-supported plate-girder hinge seam maintenance reinforcement method as claimed in claim 1, it is characterized in that: described plate seam underseal closes and specifically refers to: pressing plate adopts soft glass, press strip adopts steel plate strip, soft glass is cut into wide 8-12cm, length is equal to the flat of hinge seam length, and prepares the steel plate strip having anchor hole, is close to by flat and sews on plate, both sides pushed down by steel plate, by expansion bolt by Interal fixation bottom plate-girder.
5. the freely-supported plate-girder hinge seam maintenance reinforcement method as described in claim 1 or 4, is characterized in that: described injected rubber hose and measuring tube all adopt diameter to be less than the pvc pipe of plate seam width.
6. the freely-supported plate-girder hinge seam maintenance reinforcement method as described in claim 1 or 4, it is characterized in that: the tensile strength of described closed glue is more than or equal to 20MPa, tensile elastic film amount is more than or equal to 1500MPa, compressive strength is more than or equal to 50MPa, flexural strength is more than or equal to 30MPa and can not is brittle fracture, steel-steel stretching shear strength standard value is more than or equal to 10MPa, and non-volatile content is more than or equal to 99%.
7. freely-supported plate-girder hinge seam maintenance reinforcement method as claimed in claim 1, it is characterized in that: described JN-G casting glue meets that splitting tensile strength is more than or equal to 7.0MPa, flexural strength is more than or equal to 25MPa, compressive strength is more than or equal to 50MPa, steel-steel stretching shear strength standard value is more than or equal to 10MPa, steel-steel stretching tensile strength is more than or equal to 15MPa, steel-concrete is just drawing adhesion strength to be more than or equal to 2.5MPa and is being concrete cohesional failure, and hardening time is less than or equal to 2.5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510591631.XA CN105113430A (en) | 2015-09-17 | 2015-09-17 | Maintenance and reinforcement method for hinge joints of simply supported slabs and beams |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620263A (en) * | 2017-10-26 | 2018-01-23 | 南京林业大学 | A kind of reinforcement means for strengthening bridge lateral contact |
| CN111877163A (en) * | 2020-07-01 | 2020-11-03 | 中交第一航务工程局有限公司 | Reaming seam construction die pasting process for hollow slab beam |
| CN113338176A (en) * | 2021-06-03 | 2021-09-03 | 上海承亥桥隧工程集团有限公司 | Method for repairing hinge joint of uninterrupted traffic hollow slab bridge |
| CN113512941A (en) * | 2021-03-24 | 2021-10-19 | 宁夏公路桥梁建设有限公司 | Method for treating gap at bottom of bridge hollow slab |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620263A (en) * | 2017-10-26 | 2018-01-23 | 南京林业大学 | A kind of reinforcement means for strengthening bridge lateral contact |
| CN111877163A (en) * | 2020-07-01 | 2020-11-03 | 中交第一航务工程局有限公司 | Reaming seam construction die pasting process for hollow slab beam |
| CN113512941A (en) * | 2021-03-24 | 2021-10-19 | 宁夏公路桥梁建设有限公司 | Method for treating gap at bottom of bridge hollow slab |
| CN113338176A (en) * | 2021-06-03 | 2021-09-03 | 上海承亥桥隧工程集团有限公司 | Method for repairing hinge joint of uninterrupted traffic hollow slab bridge |
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Application publication date: 20151202 |