CN105714696A - Concrete bridge plate reinforcing method - Google Patents
Concrete bridge plate reinforcing method Download PDFInfo
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- CN105714696A CN105714696A CN201610143817.3A CN201610143817A CN105714696A CN 105714696 A CN105714696 A CN 105714696A CN 201610143817 A CN201610143817 A CN 201610143817A CN 105714696 A CN105714696 A CN 105714696A
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- 239000004567 concrete Substances 0.000 title claims abstract description 63
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 163
- 239000010959 steel Substances 0.000 claims abstract description 163
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 230000002787 reinforcement Effects 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims description 31
- 238000005485 electric heating Methods 0.000 claims description 14
- 238000004080 punching Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 210000003141 lower extremity Anatomy 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 5
- 238000007596 consolidation process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a concrete bridge plate reinforcing method. The method comprises utilization of two embedded steel plates, a steel band, four flange plates, a pre-stress steel plate heating device, a temperature sensor, a dial gauge, a controller, a left support and a right support, wherein the left support and the right support are used for supporting the concrete bridge plate, the left support is a fixed support, the right support is a sliding support, two flange plates are connected with the upper edge and the lower edge of the left side of the steel band respectively to form a left combination structure, the other two flange plates are connected with the upper edge and the lower edge of the right side of the steel band respectively to form a right combination structure, the left combination structure is connected with one embedded steel plate, the right combination structure is connected with the other embedded steel plate, and the controller is connected with the temperature sensor, the dial gauge and the pre-stress steel plate heating device respectively. The concrete bridge plate reinforcing method has the advantages of being used for heating a pre-stress steel plate at the bridge reinforcement site, effectively lowering the degree of construction difficulty, and improving construction efficiency and reinforcement effect.
Description
Technical field
The present invention relates to Technology Bridge Strengthening field, especially relate to that a kind of heating accuracy is high, difficulty of construction is low, the concrete bridge beam slab reinforcement means that consolidation effect is good.
Background technology
When carrying out bridge plate and reinforcing, usually the pre-stressed steel plate being used for reinforcement bridge plate is heated in advance, then the pre-stressed steel plate heated is placed into bridge plate bottom install, due in the process installed, the temperature meeting rapid decrease of pre-stressed steel plate, improve the difficulty of construction, and exist and need repeatedly heating repeatedly could meet the problem of construction requirement, reduce efficiency of construction.
Chinese patent mandate publication number: CN104314014A, authorize publication date on January 28th, 2015, a kind of method disclosing pre-stressed steel plate reinforced concrete bridge, carry out according to following steps: concrete surface processes needs the region of fixation steel plate to clear up on two adjacent beam slabs of bridge, reject top layer loose matter, remove surface laitance, remove surface dust；Boring is planted and is buried screw rod and determine screw hole position according to designing requirement and hole；Then adopt structure glue to plant and bury screw rod, until structure glue solidification-stable；According to the calculating planting screw position and the coefficient of expansion buried, steel plate to be pasted is carried out supporting punching, then the sticking veneer of steel plate is eliminated rust and coarse process；Steel plate heats, fixes and heat steel plate to 50 to 60 DEG C, is set on immediately after in aforementioned screw rod；Affixing steel plate is coated with filling structure glue between concrete surface and affixing steel plate, it is ensured that fill closely between the two；Then fix with nut screwing clamping；Surface of steel plate preservative treatment.The weak point of this invention is, difficulty of construction is high, and efficiency of construction is low.
Summary of the invention
The goal of the invention of the present invention is to overcome the heating means of pre-stressed steel plate of the prior art to cause the deficiency that difficulty of construction is high, efficiency of construction is low, it is provided that a kind of heating accuracy is high, difficulty of construction is low, the concrete bridge beam slab reinforcement means that consolidation effect is good.
To achieve these goals, the present invention is by the following technical solutions:
A kind of concrete bridge beam slab reinforcement means, including 2 pieces of pre-embedded steel slabs, steel band, 4 blocks of wing plates, prestress steel heating apparatus, temperature sensor, dial gauge, controller and for supporting left support abutment and the right support abutment of concrete bridge beam slab；Left support abutment is hold-down support, right support abutment is sliding support, 2 blocks of wing plates are connected with steel band left part top edge and lower limb respectively and constitute left part combinative structure, other 2 blocks of wing plates are connected with steel band right part top edge and lower limb respectively and constitute right part combinative structure, left part combinative structure and 1 piece of pre-embedded steel slab connect, and right part combinative structure is connected with another 1 piece of pre-embedded steel slab；Controller electrically connects with temperature sensor, dial gauge and heater respectively；
Comprising the steps: the fluting punching of concrete bridge beam slab, install pre-embedded steel slab, measure bolt position and perforate, 4 blocks of wing plates are welded to the both sides of steel band left part and right part, steel band is fixed temporarily, installs dial gauge, heats steel band, installs steel band.
Reinforcing scene at bridge plate, prestress steel heating apparatus heats to pre-stressed steel plate, is provided with length threshold W and weld seam shearing strength f in controllerv w, make temperature sensor contact with pre-stressed steel plate, with support, casing stably supported；
Controller controls pre-stressed steel plate heating devices heat, the temperature of temperature sensor detection pre-stressed steel plate, the length w ' of centimeter check pre-stressed steel plate elongation, controller calculates weld seam shearing strength, as w ' >=W, controller controls each bar and adds electric heating cable stopping heating；
Make temperature sensor, dial gauge separate with pre-stressed steel plate, pre-stressed steel plate is installed on bridge plate, make heat conduction baffle separate with pre-stressed steel plate.
After using the reinforcement means of the present invention, can in the process that pre-stressed steel plate is heated, pre-stressed steel plate is installed on bridge plate, the length being effectively ensured pre-stressed steel plate reaches construction requirement, do not need repeatedly repeatedly to heat pre-stressed steel plate, reduce the difficulty of construction, improve efficiency of construction and consolidation effect.
As preferably, the fluting punching of concrete bridge beam slab, installation pre-embedded steel slab, measurement bolt position and perforate include following detailed step:
Concrete bridge beam slab fluting punching: first concrete bridge beam slab lower surface left part inside left support abutment and right support abutment and right part dig the concrete pit that can hold pre-embedded steel slab respectively, and groove depth is 0.85 to 1.2cm；And beating several the first bolts hole in 2 concrete pits, the degree of depth of each first bolt hole is 10.7-11.9cm；
Pre-embedded steel slab is installed: on 2 pieces of pre-embedded steel slabs, beat several second bolts hole, the thick structure glue of 2.5 to 3cm is coated at 2 pieces of pre-embedded steel slab upper surfaces, each first bolt hole is implanted chemical bolt, each chemical bolt is made to be each passed through each second bolt hole of two pieces of pre-embedded steel slabs, tighten the nut of each chemical bolt, make two pieces of pre-embedded steel slabs bonding with two concrete pits respectively；
Measure bolt position and perforate: measure the position of each chemical bolt, and open threeth bolt hole corresponding with each chemical bolt with right part combinative structure at left part combinative structure.
As preferably, steel band fixing, installation dial gauge, heating steel band and installation steel band temporarily include following detailed step:
Steel band is fixed temporarily: unclamp the nut of each chemical bolt of the concrete pit of concrete bridge beam slab left part, makes screw rod each bolt hole through left part combinative structure of each chemical bolt the nut of each bolt of screwing on, makes steel band be positioned at below embedded board；
Dial gauge is installed: the bridge post below concrete bridge beam slab right part is provided with dial gauge, makes steel band right-hand member contact with the measurement bar of dial gauge；
Heating steel band: steel band is put in prestress steel heating apparatus, be provided with length threshold W in controller, make temperature sensor contact with pre-stressed steel plate, with support, prestress steel heating apparatus is stably supported；
Controller controls prestress steel heating apparatus and steel band is heated, the temperature of temperature sensor detection pre-stressed steel plate, the length w ' of centimeter check pre-stressed steel plate elongation, and as w ' >=W, controller controls the heating of pre-stressed steel plate heater stop；
Steel band is installed: make temperature sensor, dial gauge separate with pre-stressed steel plate, the screw rod of each chemical bolt of the concrete pit of concrete bridge beam slab right part is penetrated each the 3rd bolt hole of right part combinative structure, tightens the nut of all chemical bolts；Remove prestress steel heating apparatus, complete the reinforcing of concrete bridge beam slab.
As preferably, described prestress steel heating apparatus includes the strip casing that cross section is concave shape, and be located on the plate upper surface of casing some add electric heating cable and are located at the heat conduction baffle that each bar adds on electric heating cable；Strip tank ends opening, each bar adds electric heating cable and extends along the length direction of casing；Controller adds electric heating cable with each bar and electrically connects.
As preferably, being provided with the cavity that cross section is concave shape in casing, be filled with glass fibre cotton in cavity.
As preferably, described heat conduction baffle both sides of the edge contact with box inside wall, and heat conduction baffle adopts iron material to make.
As preferably, each chemical bolt being equipped with anchoring adhesive, left support abutment is section is I-shaped rubber support, and right support abutment adopts polyethylene tetrafluoro plate to make.
As preferably, each the 3rd bolt hole on right part combinative structure is the slotted eye extended along steel band length direction.
As preferably, also including alarm and memorizer, alarm and memorizer and be all electrically connected with the controller；Also include temperature sensor fault detecting step:
Memorizer is provided with the standard temperature signal curve of temperature sensor；
(9-1) controller obtains temperature signal curve S (t) of temperature sensor, and controller extracts temperature signal value M corresponding with each interval in S (t)1..., Mn；The sequence number of design temperature signal value is i, i=1 ..., n；
(9-2) controller utilizes formulaCalculate each temperature signal value MiSteady rate ratioi；
When S (t) and standard temperature signal curve are without the ratio of intersection point and each temperature signal valueiBe respectively positioned on outside [1-A1,1+A1] scope, then controller control alarm sends the warning message of abnormality of temperature sensors.
As preferably, 2 blocks of wing plates of left part combinative structure and right part combinative structure are connected with steel band each through weld seam, set weld seam shearing strength as fv w, the tensile strength of steel band is f, and the axle center static load of left part combinative structure and right part combinative structure is the cross-sectional area that M, M=fA, A are steel band；
Replace with as w ' >=W:
As w ' >=W and M/ (2H1×H2) < fv wTime, H1For fusion length, H2For weld bead height.
Therefore, there is advantages that and can be used at bridge strengthening scene, pre-stressed steel plate being heated, effectively reduce difficulty of construction, improve efficiency of construction and consolidation effect.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the prestress steel heating apparatus of the present invention；
Fig. 2 is a kind of structural representation of the steel band of the present invention and 4 blocks of wing plates；
Fig. 3 is a kind of structural representation of the pre-embedded steel slab of the present invention；
Fig. 4 is a kind of theory diagram of the present invention；
Fig. 5 is a kind of flow chart of embodiments of the invention 1；
Fig. 6 is a kind of structural representation of the concrete bridge beam slab of the present invention, bridge post, left support abutment, right support abutment.
In figure: pre-embedded steel slab 1, steel band 2, wing plate 3, prestress steel heating apparatus 4, temperature sensor 5, dial gauge 6, controller 7, bar shaped casing 8, add electric heating cable 9, heat conduction baffle 10, cavity 11, handle the 12, the 3rd bolt hole 13, alarm 14, memorizer 15, left support abutment 16, right support abutment the 17, second bolt hole 18, concrete bridge beam slab 19, bridge post 20.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Embodiment 1
Embodiment as shown in Figure 1, Figure 2, Figure 6 shows is a kind of concrete bridge beam slab 19 reinforcement means, including 2 pieces of pre-embedded steel slabs 1,2,4 blocks of wing plates 3 of steel band, prestress steel heating apparatus 4, temperature sensor 5, dial gauge 6, controller 7 and for supporting left support abutment 16 and the right support abutment 17 of concrete bridge beam slab；Left support abutment is hold-down support, and right support abutment is sliding support；
As shown in Figure 2,2 blocks of wing plates are connected with steel band left part top edge and lower limb respectively and constitute left part combinative structure, other 2 blocks of wing plates are connected with steel band right part top edge and lower limb respectively and constitute right part combinative structure, left part combinative structure and 1 piece of pre-embedded steel slab connect, and right part combinative structure is connected with another 1 piece of pre-embedded steel slab；Each the 3rd bolt hole on right part combinative structure is the slotted eye extended along steel band length direction.As shown in Figure 4, controller electrically connects with temperature sensor, dial gauge and heater respectively；
As it is shown in figure 1, prestress steel heating apparatus includes the strip casing 8 that cross section is concave shape, it is located on the plate upper surface of casing 3 and adds electric heating cable 9 and be located at the heat conduction baffle 10 that each bar adds on electric heating cable；Strip tank ends opening, each bar adds electric heating cable and extends along the length direction of casing；Controller adds electric heating cable with each bar and electrically connects, and casing is provided with 2 pairs of handles 12.
It is provided with the cavity 11 that cross section is concave shape in casing, in cavity, is filled with glass fibre cotton.Heat conduction baffle both sides of the edge contact with box inside wall, and heat conduction baffle adopts iron material to make.Being equipped with anchoring adhesive on each bolt, left support abutment is section is I-shaped rubber support, and right support abutment adopts polyethylene tetrafluoro plate to make.
As it is shown in figure 5, comprise the steps:
Step 100, the fluting punching of concrete bridge beam slab
First concrete bridge beam slab lower surface left part inside left support abutment and right support abutment and right part dig the concrete pit that can hold 50cm × 34cm pre-embedded steel slab respectively, and groove depth is 1cm；And making a call to 11 the first bolts hole in 2 concrete pits respectively, the degree of depth of each first bolt hole is 11.5cm；
Step 200, installs pre-embedded steel slab
As shown in Figure 3,2 pieces of pre-embedded steel slabs are made a call to 11 the second bolts hole 18 respectively, the thick structure glue of 2.5cm is coated at 2 pieces of pre-embedded steel slab upper surfaces, each first bolt hole is implanted chemical bolt, each chemical bolt is made to be each passed through each second bolt hole of two pieces of pre-embedded steel slabs, tighten the nut of each chemical bolt, make two pieces of pre-embedded steel slabs bonding with two concrete pits respectively；
Step 300, measures bolt position and perforate
Measure the position of each chemical bolt, measure the position of each chemical bolt, and open threeth bolt hole 13 as shown in Figure 2 corresponding with each chemical bolt with right part combinative structure at left part combinative structure；
Step 400, steel band is fixed temporarily
Unclamp the nut of each chemical bolt of the concrete pit of concrete bridge beam slab left part, make screw rod each bolt hole through left part combinative structure of each chemical bolt the nut of each bolt of screwing on, make steel band be positioned at below embedded board；
Step 500, installs dial gauge
Bridge post as shown in Figure 6 below concrete bridge beam slab right part is provided with dial gauge, makes steel band right-hand member contact with the measurement bar of dial gauge；
Step 600, heats steel band
Steel band is put in prestress steel heating apparatus, controller is provided with length threshold W, make temperature sensor contact with pre-stressed steel plate, with support, prestress steel heating apparatus is stably supported；
Controller controls prestress steel heating apparatus and steel band is heated, the temperature of temperature sensor detection pre-stressed steel plate, the length w ' of centimeter check pre-stressed steel plate elongation, 2 blocks of wing plates of left part combinative structure and right part combinative structure are connected with steel band each through weld seam, set weld seam shearing strength as fv w, the tensile strength of steel band is f, and the axle center static load of left part combinative structure and right part combinative structure is the cross-sectional area that M, M=fA, A are steel band；As w ' >=W and M/ (2H1×H2) < fv wTime, controller controls the heating of pre-stressed steel plate heater stop；Wherein, H1For fusion length, H2For weld bead height；
Step 700, installs steel band
Make temperature sensor, dial gauge separate with pre-stressed steel plate, the screw rod of each chemical bolt of the concrete pit of concrete bridge beam slab right part is penetrated each the 3rd bolt hole of right part combinative structure, tightens the nut of all chemical bolts；Remove prestress steel heating apparatus, complete the reinforcing of concrete bridge beam slab.
In the present invention, f=310N/mm2,
M=fA=310 × 1000=310kN, f are design tensile strength, and A is 1000mm2, fv w=125N/mm2, M/ (2 × H1×H2)=310KN/ (2 × 500 × 10)=31N/mm2, H1For 500mm, H2For 10mm.
Steel band is of a size of the thickness of 640cm × 10cm × 1cm, embedded board and wing plate and is the chemical bolt 22 of 1cm, M16, and diameter 1.6cm, length 19cm, supporting nut thickness is 1.2cm.
Embodiment 2
Embodiment 2 includes all structures and the step part of embodiment 1, as shown in Figure 4, also includes alarm 14 and memorizer 15, alarm and memorizer are all electrically connected with the controller；Temperature sensor fault detecting step was also included before the step 600 of embodiment 1:
Memorizer is provided with the standard temperature signal curve of temperature sensor；
(9-1) controller obtains temperature signal curve S (t) of temperature sensor, and controller extracts temperature signal value M corresponding with each interval in S (t)1..., Mn；The sequence number of design temperature signal value is i, i=1 ..., n；
(9-2) controller utilizes formulaCalculate each temperature signal value MiSteady rate ratioi；
When S (t) and standard temperature signal curve are without the ratio of intersection point and each temperature signal valueiBe respectively positioned on outside [1-A1,1+A1] scope, then controller control alarm sends the warning message of abnormality of temperature sensors, and A1 is 0.2.
Should be understood that the present embodiment is merely to illustrate the present invention rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.
Claims (10)
1. a concrete bridge beam slab reinforcement means, it is characterized in that, including 2 pieces of pre-embedded steel slabs (1), steel band (2), 4 pieces of wing plates (3), prestress steel heating apparatus (4), temperature sensor (5), dial gauge (6), controllers (7) be used for supporting the left support abutment (16) of concrete bridge beam slab (19) and right support abutment (17)；Left support abutment is hold-down support, right support abutment is sliding support, 2 blocks of wing plates are connected with steel band left part top edge and lower limb respectively and constitute left part combinative structure, other 2 blocks of wing plates are connected with steel band right part top edge and lower limb respectively and constitute right part combinative structure, left part combinative structure and 1 piece of pre-embedded steel slab connect, and right part combinative structure is connected with another 1 piece of pre-embedded steel slab；Controller electrically connects with temperature sensor, dial gauge and heater respectively；
Comprising the steps: the fluting punching of concrete bridge beam slab, install pre-embedded steel slab, measure bolt position and perforate, 4 blocks of wing plates are welded to the both sides of steel band left part and right part, steel band is fixed temporarily, installs dial gauge, heats steel band, installs steel band.
2. concrete bridge beam slab reinforcement means according to claim 1, is characterized in that, the fluting punching of concrete bridge beam slab, installation pre-embedded steel slab, measurement bolt position and perforate include following detailed step:
Concrete bridge beam slab fluting punching: first concrete bridge beam slab lower surface left part inside left support abutment and right support abutment and right part dig the concrete pit that can hold pre-embedded steel slab respectively, and groove depth is 0.85 to 1.2cm；And beating several the first bolts hole in 2 concrete pits, the degree of depth of each first bolt hole is 10.7-11.9cm；
Pre-embedded steel slab is installed: on 2 pieces of pre-embedded steel slabs, beat several the second bolts hole (18), the thick structure glue of 2.5 to 3cm is coated at 2 pieces of pre-embedded steel slab upper surfaces, each first bolt hole is implanted chemical bolt, each chemical bolt is made to be each passed through each second bolt hole of two pieces of pre-embedded steel slabs, tighten the nut of each chemical bolt, make two pieces of pre-embedded steel slabs bonding with two concrete pits respectively；
Measure bolt position and perforate: measure the position of each chemical bolt, and open threeth bolt hole (13) corresponding with each chemical bolt with right part combinative structure at left part combinative structure.
3. concrete bridge beam slab reinforcement means according to claim 1, is characterized in that, steel band fixing, installation dial gauge, heating steel band and installation steel band temporarily include following detailed step:
Steel band is fixed temporarily: unclamp the nut of each chemical bolt of the concrete pit of concrete bridge beam slab left part, makes screw rod each bolt hole through left part combinative structure of each chemical bolt the nut of each bolt of screwing on, makes steel band be positioned at below embedded board；
Dial gauge is installed: the bridge post (20) below concrete bridge beam slab right part is provided with dial gauge, makes steel band right-hand member contact with the measurement bar of dial gauge；
Heating steel band: steel band is put in prestress steel heating apparatus, be provided with length threshold W in controller, make temperature sensor contact with pre-stressed steel plate, with support, prestress steel heating apparatus is stably supported；
Controller controls prestress steel heating apparatus and steel band is heated, the temperature of temperature sensor detection pre-stressed steel plate, the length w ' of centimeter check pre-stressed steel plate elongation, and as w ' >=W, controller controls the heating of pre-stressed steel plate heater stop；
Steel band is installed: make temperature sensor, dial gauge separate with pre-stressed steel plate, the screw rod of each chemical bolt of the concrete pit of concrete bridge beam slab right part is penetrated each the 3rd bolt hole of right part combinative structure, tightens the nut of all chemical bolts；Remove prestress steel heating apparatus, complete the reinforcing of concrete bridge beam slab.
4. concrete bridge beam slab reinforcement means according to claim 1, it is characterized in that, described prestress steel heating apparatus includes the strip casing (8) that cross section is concave shape, and be located on the plate upper surface of casing some add electric heating cable (9) and are located at the heat conduction baffle (10) that each bar adds on electric heating cable；Strip tank ends opening, each bar adds electric heating cable and extends along the length direction of casing；Controller adds electric heating cable with each bar and electrically connects.
5. concrete bridge beam slab reinforcement means according to claim 4, is characterized in that, is provided with the cavity (11) that cross section is concave shape, is filled with glass fibre cotton in cavity in casing.
6. concrete bridge beam slab reinforcement means according to claim 4, is characterized in that, described heat conduction baffle both sides of the edge contact with box inside wall, and heat conduction baffle adopts iron material to make.
7. concrete bridge beam slab reinforcement means according to claim 2, is characterized in that, each chemical bolt is equipped with anchoring adhesive, and left support abutment is section is I-shaped rubber support, and right support abutment adopts polyethylene tetrafluoro plate to make.
8. concrete bridge beam slab reinforcement means according to claim 2, is characterized in that, each the 3rd bolt hole on right part combinative structure is the slotted eye extended along steel band length direction.
9. the concrete bridge beam slab reinforcement means according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, also includes alarm (14) and memorizer (15), and alarm and memorizer are all electrically connected with the controller；It is characterized in that, also include temperature sensor fault detecting step:
Memorizer is provided with the standard temperature signal curve of temperature sensor；
(9-1) controller obtains temperature signal curve S (t) of temperature sensor, and controller extracts temperature signal value M corresponding with each interval in S (t)1..., Mn；The sequence number of design temperature signal value is i, i=1 ..., n；
(9-2) controller utilizes formulaCalculate each temperature signal value MiSteady rate ratioi；
When S (t) and standard temperature signal curve are without the ratio of intersection point and each temperature signal valueiBe respectively positioned on outside [1-A1,1+A1] scope, then controller control alarm sends the warning message of abnormality of temperature sensors.
10. the concrete bridge beam slab reinforcement means described in claim 3, is characterized in that, 2 blocks of wing plates of left part combinative structure and right part combinative structure are connected with steel band each through weld seam, set weld seam shearing strength asThe tensile strength of steel band is f, and the axle center static load of left part combinative structure and right part combinative structure is the cross-sectional area that M, M=fA, A are steel band；
Replace with as w ' >=W:
As w ' >=W andTime, H1For fusion length, H2For weld bead height.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107190655A (en) * | 2017-06-08 | 2017-09-22 | 阮哲栋 | A kind of bridge equipment |
| CN108732014A (en) * | 2018-05-18 | 2018-11-02 | 中铁九桥工程有限公司 | A kind of tetrafluoro plate pastes the detection device and detection method of shearing strength |
| CN111112951A (en) * | 2019-12-30 | 2020-05-08 | 安徽长江机床制造（集团）有限公司 | Machining method for upper die mounting frame of bending machine |
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| CN111112951A (en) * | 2019-12-30 | 2020-05-08 | 安徽长江机床制造（集团）有限公司 | Machining method for upper die mounting frame of bending machine |
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