CN107815977B - Pre-stressed steel plate and presstressed reinforcing steel composite reinforcement large-span concrete beam construction method - Google Patents
Pre-stressed steel plate and presstressed reinforcing steel composite reinforcement large-span concrete beam construction method Download PDFInfo
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- CN107815977B CN107815977B CN201710953856.4A CN201710953856A CN107815977B CN 107815977 B CN107815977 B CN 107815977B CN 201710953856 A CN201710953856 A CN 201710953856A CN 107815977 B CN107815977 B CN 107815977B
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- 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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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Abstract
The present invention relates to the reinforcing wide-span construction method for concrete beam that a kind of pre-stressed steel plate is combined with presstressed reinforcing steel, comprising the following steps: S1, fixes two sides of beams of concrete by high-strength anchor bolt with beam side steel plate；S2, wing plate is set in beams of concrete and floor delivery position；S3, in beams of concrete bottom, setting is shored；S4, mounting rail face steel plate；S5, mounting rail bottom steel plate；S6, prestressed steel tendon, steering block and anchorage bearing；S7, prestressing steel wire bunch staged stretched is carried out；S8, beam face steel plate staged stretched is carried out；S9, beam bottom steel plate staged stretched is carried out；S10, full joist steel plate are symmetrically welded and adjust steel plate stress value；S11, flooring static test is carried out；S12, whole support systems are removed.The present invention utilizes traditional material, and a variety of construction technologies of integrated use improve the stressed effect of reinforcement.
Description
Technical field
The present invention relates to building engineering fields, combine more specifically to a kind of pre-stressed steel plate with presstressed reinforcing steel
Reinforcing wide-span construction method for concrete beam.
Background technique
The beams of concrete of large span uses merely steel plate reinforcement, causes the thickness of construction usage steel plate to be significantly increased, increases
The self weight of beams of concrete after reinforcing.It is only reinforced with steel strand wires, increases the quantity of steel strand wires, but also increased and open
Difficulty during drawing.Single reinforcing mode increases the difficulty of construction while increasing construction cost.Traditional reinforcing side
There are materials from the problem of great, difficulty of construction is big for formula.
Summary of the invention
The technical problem to be solved in the present invention is that providing a kind of pre-stressed steel plate and presstressed reinforcing steel composite reinforcement large span
Construction method for concrete beam.
The technical solution adopted by the present invention to solve the technical problems is: constructing a kind of pre-stressed steel plate and presstressed reinforcing steel group
The reinforcing wide-span construction method for concrete beam of conjunction, the beams of concrete are located at below floor, floor be located at two beam supports it
Between, comprising the following steps:
S1, two sides of beams of concrete are fixed with beam side steel plate by high-strength anchor bolt；
S2, wing plate is set in beams of concrete and floor delivery position, wing plate and beam side steel plate weld；
S3, in beams of concrete bottom, setting is shored, and makes beams of concrete to be reinforced under self weight state, is in zero shift shape
State；
S4, mounting rail face steel plate weld beam face steel plate by styletable；
S5, mounting rail bottom steel plate, beam bottom steel plate and beam coxostermum carry out T junction welding procedure, at this time beam bottom steel plate with
Small sliding can be done between the U-lag weld seam and beams of concrete of beam coxostermum welding forming；
S6, prestressed steel tendon, steering block and anchorage bearing are designed with anchorage bearing, beam face on two beam supports
Steering block is designed on steel plate and beam bottom steel plate, prestressing steel wire bunch is fixed on anchorage bearing around steering block；
S7, prestressing steel wire bunch staged stretched is carried out；
S8, beam face steel plate staged stretched is carried out；
S9, beam bottom steel plate staged stretched is carried out；
S10, full joist steel plate are symmetrically welded and adjust steel plate stress value；
S11, flooring static test is carried out；
S12, whole support systems are removed.
In above scheme, before the step S1, it is also necessary to handle steel plate, beam, column surface, steel member installation
It is preceding to use mechanical derusting, it primes.
In above scheme, there is aperture on wing plate, wing plate and beam face steel plate are fixed using split bolt.
In above scheme, shoring in the step S3 is shored using hydraulic jack, and liquid is housed at the top of hydraulic jack
Pressure oil table.
In above scheme, beam face steel plate includes fixed area beam face steel plate and tensioning region beam face steel plate.
In above scheme, the beam bottom steel plate includes fixed area beam bottom steel plate and tensioning region beam bottom steel plate.
In above scheme, in the step S7, ess-strain monitoring is carried out, prestress application value is adjusted in real time, makes pre-
The actually applied situation of stress and effect approach construction are simulated, and after the completion of tensioning, are observed for 24 hours, detailed interrecord structure displacement deformation feelings
Condition meets Construction control and requires to carry out beam face steel plate stretching construction.
In above scheme, in the step S8, tensioning equipment is set in steel plate stretching end, is pushed away using hydraulic jack is counter
The support of tensioning region beam face surface of steel plate welds intermediate openings after the completion of tensioning and anchors, and carries out ess-strain prison in the process
Control adjusts prestress application value in real time, simulates the actually applied situation of prestressing force and effect approach construction, after the completion of tensioning, sees
It surveys for 24 hours, detailed interrecord structure displacement deformation situation, meets Construction control and require to carry out beam bottom steel plate stretching construction.
In above scheme, in the step S9, tensioning equipment is set in steel plate stretching end, is pushed away using hydraulic jack is counter
The support of tensioning region beam face surface of steel plate carries out welding anchoring to opening after the completion of tensioning, carries out ess-strain prison in the process
Control adjusts prestress application value in real time, simulates the actually applied situation of prestressing force and effect approach construction.
In above scheme, in the step S10, if steel plate stress exceeds Construction control range, need to prestressing force
Muscle moderately carries out tensioning or puts to open, and adjusts steel plate stress value.Hydraulic jack support unloading observes beam bottom steel plate stress to zero,
If steel plate stress exceeds Construction control range, needs moderately to carry out tensioning to presstressed reinforcing steel or put to open, adjust steel plate stress value.
Implement the reinforcing wide-span construction method for concrete beam that pre-stressed steel plate of the invention is combined with presstressed reinforcing steel, has
Below the utility model has the advantages that
The present invention is by prestressing force steel bonding and internal, External prestressed steel strand wires synergistic effects, in prestress wire energy
While fully ensuring that overall structure uses safe, using the tension stress of steel plate to component positive moment of span central point and both ends hogging moment
" peak load shifting " redistributes large-span concrete roof beam internal stress, and stress is more rational, deforms smaller, satisfaction building
The requirement of function.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of original structure beam；
Fig. 2 is that large-span concrete beam reinforces schematic diagram；
Fig. 3 is the 1-1 cross-sectional view in Fig. 2；
Fig. 4 is the 2-2 cross-sectional view in Fig. 2；
Fig. 5 is the top view of Fig. 2；
Fig. 6 is the bottom view of Fig. 2；
Fig. 7 is the stretch-draw anchor end detail treatment schematic diagram in Fig. 6；
Fig. 8 is hydraulic jack, foil gauge, displacement meter schematic view of the mounting position.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
As shown in figures 1-8, it is applied in the reinforcing wide-span beams of concrete that pre-stressed steel plate of the invention is combined with presstressed reinforcing steel
Work method the following steps are included:
S1, beams of concrete 12 to be reinforced are located at 13 lower section of floor, and floor 13 is located between two beam supports 11.Before construction
Steel plate, beam, column surface are handled, mechanical derusting is used before steel member installation, primes.Former beams of concrete (see figure 2)
Two sides are fixed by high-strength anchor bolt 2 with beam side steel plate 1, and all high-strength anchor bolts 2 pass through beams of concrete 12, but cannot interrupt
Or the reinforcing bar in damage original structure beam.
S2, floor are reinforced.Increase wing plate 3 in reinforcement and structure flooring delivery position, is welded with beam side steel plate, and
The aperture on wing plate, it is fixed using split bolt 4.
S3, beam face are shored, and make concrete component to be reinforced under self weight state, are in zero-bit shifting state.Shore use
Hydraulic jack is shored, and the power of shoring of hydraulic jack is determined by calculation, and hydraulic oil meter is housed at the top of jack, carries out stress
Control.Fig. 8 is shown in the signal of hydraulic jack installation position.
S4, mounting rail face steel plate 5 weld beam face steel plate by styletable, and installation bolt is in place；Beam face steel plate is in beam length
The bolt hole preboring (bolt is not installed) in region is spent, beam face steel plate span centre stays seam, and seam position is stayed to be computed determination, beam face steel plate 5
It is divided into fixed area beam face steel plate 5a, tensioning region beam face steel plate 5b two parts are detailed in Fig. 5.
S5, mounting rail bottom steel plate 6, beam bottom steel plate 6 and beam coxostermum carry out T junction welding procedure, and beam bottom steel plate 6 is in beam
The bolt hole preboring (bolt is not installed) of length areas, at this time the shape slot weld 7 of beam bottom steel plate and beam coxostermum welding forming with
Small sliding can be done between beam.Beam bottom steel plate span centre stays seam, stays seam position to be computed determination, beam bottom steel plate 6 divides for fixed area
Beam face steel plate 6a, tensioning region beam face steel plate 6b two parts, is detailed in Fig. 6.
S6, prestressed steel tendon 8, steering block 9, anchorage bearing 10.Fig. 3, Fig. 4 are seen in the position of steel wire bundle, turn to
The position of block is determined by calculating, with to avoid stress loss when tensioning.
S7,8 staged stretched of prestressing steel wire bunch.Ess-strain monitoring (ess-strain monitoring point arrangement is carried out in the process
Fig. 8 is shown in signal), prestress application value is adjusted in real time, simulates the actually applied situation of prestressing force and effect approach construction.Tensioning is complete
Cheng Hou, for 24 hours, detailed interrecord structure displacement deformation situation meets Construction control and requires to carry out back portion steel plate stretching construction for observation.
S8,5 staged stretched of beam face pre-stressed steel plate.Tensioning equipment is set in steel plate stretching end, using hydraulic jack
The anti-support (being detailed in Fig. 7) for pushing away the tensioning region beam face surface steel plate 5b welds intermediate openings after the completion of tensioning and anchors.In the process
Ess-strain monitoring (Fig. 8 is shown in the arrangement signal of ess-strain monitoring point) is carried out, prestress application value is adjusted in real time, keeps prestressing force real
Border applies situation and effect approach construction is simulated.After the completion of tensioning, for 24 hours, detailed interrecord structure displacement deformation situation meets for observation
Construction control requires to carry out beam bottom portion steel plate stretching construction.
S9,6 staged stretched of beam bottom pre-stressed steel plate.Tensioning equipment is set in steel plate stretching end, using hydraulic jack
The anti-support (being detailed in Fig. 7) for pushing away the tensioning region beam face surface steel plate 6b carries out welding anchoring to opening after the completion of tensioning.In the process
Ess-strain monitoring (Fig. 8 is shown in the arrangement signal of ess-strain monitoring point) is carried out, prestress application value is adjusted in real time, keeps prestressing force real
Border applies situation and effect approach construction is simulated.
S10, full joist steel plate are symmetrically welded and adjust steel plate stress value.After the completion of reinforcement beam bottom, the steel plate tensioning of beam face, entirely
Beam is symmetrically welded, and after being welded as a whole, (figure is shown in the arrangement signal of ess-strain monitoring point for observation beam bottom, beam face steel plate stress state
8) it, if steel plate stress exceeds Construction control range, needs moderately to carry out tensioning to presstressed reinforcing steel or put to open, adjusts steel plate stress
Value.Hydraulic jack support unloading is observed beam bottom steel plate stress, if steel plate stress exceeds Construction control range, is needed to zero
Tensioning is moderately carried out to presstressed reinforcing steel or is put to open, and adjusts steel plate stress value.
S11, flooring static test, to verify consolidation effect.Load is loaded using sandbag pile on beam, and floor is using note
Water is loaded.By load test, can detect strenthening member meet requirement for bearing capacity, and whether stress and displacement are controlled in construction
Within the scope of system.Beam bottom, beam face steel plate stress are observed simultaneously.
S12, all supports are removed
Roofing static test is qualified, removes support system.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (8)
1. the reinforcing wide-span construction method for concrete beam that a kind of pre-stressed steel plate is combined with presstressed reinforcing steel, the beams of concrete position
Below floor, floor is located between two beam supports, which comprises the following steps:
S1, two sides of beams of concrete are fixed with beam side steel plate by high-strength anchor bolt；
S2, wing plate is set in beams of concrete and floor delivery position, wing plate and beam side steel plate weld；
S3, in beams of concrete bottom, setting is shored, and makes beams of concrete to be reinforced under self weight state, is in zero-bit shifting state；
S4, mounting rail face steel plate weld beam face steel plate by styletable；Beam face steel plate includes fixed area beam face steel plate
With tensioning region beam face steel plate；
S5, mounting rail bottom steel plate, beam bottom steel plate and beam coxostermum carry out T junction welding procedure, at this time beam bottom steel plate and beam side
Small sliding can be done between the U-lag weld seam and beams of concrete of web welding forming；
S6, prestressed steel tendon, steering block and anchorage bearing are designed with anchorage bearing, beam face steel plate on two beam supports
Be designed with steering block on beam bottom steel plate, prestressing steel wire bunch is fixed on anchorage bearing around steering block；
S7, prestressing steel wire bunch staged stretched is carried out；
S8, beam face steel plate staged stretched is carried out；In the step S8, tensioning equipment is set in steel plate stretching end, using liquid
Press the anti-support for pushing away tensioning region beam face surface of steel plate of jack, intermediate openings welded after the completion of tensioning and anchored, in the process into
The monitoring of row ess-strain, adjusts prestress application value in real time, simulates the actually applied situation of prestressing force and effect approach construction,
After the completion of drawing, for 24 hours, detailed interrecord structure displacement deformation situation meets Construction control and progress beam bottom steel plate tensioning is required to apply for observation
Work；
S9, beam bottom steel plate staged stretched is carried out；
S10, full joist steel plate are symmetrically welded and adjust steel plate stress value；
S11, flooring static test is carried out；
S12, whole support systems are removed.
2. the reinforcing wide-span beams of concrete construction party that pre-stressed steel plate according to claim 1 is combined with presstressed reinforcing steel
Method, which is characterized in that before the step S1, it is also necessary to steel plate, beam, column surface be handled, adopted before steel member installation
With mechanical derusting, prime.
3. the reinforcing wide-span beams of concrete construction party that pre-stressed steel plate according to claim 1 is combined with presstressed reinforcing steel
Method, which is characterized in that have aperture on wing plate, wing plate and beam face steel plate are fixed using split bolt.
4. the reinforcing wide-span beams of concrete construction party that pre-stressed steel plate according to claim 1 is combined with presstressed reinforcing steel
Method, which is characterized in that shoring in the step S3 is shored using hydraulic jack, and hydraulic oil is housed at the top of hydraulic jack
Table.
5. the reinforcing wide-span beams of concrete construction party that pre-stressed steel plate according to claim 1 is combined with presstressed reinforcing steel
Method, which is characterized in that the beam bottom steel plate includes fixed area beam bottom steel plate and tensioning region beam bottom steel plate.
6. the reinforcing wide-span beams of concrete construction party that pre-stressed steel plate according to claim 1 is combined with presstressed reinforcing steel
Method, which is characterized in that in the step S7, carry out ess-strain monitoring, adjust prestress application value in real time, keep prestressing force real
Border applies situation and effect approach construction is simulated, and after the completion of tensioning, for 24 hours, detailed interrecord structure displacement deformation situation meets for observation
Construction control requires to carry out beam face steel plate stretching construction.
7. the reinforcing wide-span beams of concrete construction party that pre-stressed steel plate according to claim 5 is combined with presstressed reinforcing steel
Method, which is characterized in that in the step S9, tensioning equipment is set in steel plate stretching end, pushes away tensioning using hydraulic jack is counter
The support of region beam face surface of steel plate carries out welding anchoring to opening after the completion of tensioning, carries out ess-strain monitoring in the process, real
When adjust prestress application value, simulate the actually applied situation of prestressing force and effect approach construction.
8. the reinforcing wide-span beams of concrete construction party that pre-stressed steel plate according to claim 1 is combined with presstressed reinforcing steel
Method, which is characterized in that in the step S10, if steel plate stress exceeds Construction control range, need to presstressed reinforcing steel appropriateness
It carries out tensioning or puts to open, adjust steel plate stress value；Hydraulic jack support unloading observes beam bottom steel plate stress, if steel to zero
Plate stress exceeds Construction control range, then needs moderately to carry out tensioning to presstressed reinforcing steel or put to open, adjust steel plate stress value.
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| CN201710953856.4A CN107815977B (en) | 2017-10-13 | 2017-10-13 | Pre-stressed steel plate and presstressed reinforcing steel composite reinforcement large-span concrete beam construction method |
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| CN109537929B (en) * | 2018-11-30 | 2021-04-20 | 北京市建筑工程研究院有限责任公司 | Reinforcing device and reinforcing method for extracting column reconstruction |
| CN109898883A (en) * | 2019-04-16 | 2019-06-18 | 江苏交通工程咨询监理有限公司 | A kind of anchorage technology measure of armored concrete beam bottom sticking carbon fiber plate |
| CN110616751B (en) * | 2019-09-24 | 2024-06-18 | 华侨大学 | Experimental device for simulating influence of foundation pit excavation on bearing capacity of adjacent building foundation piles |
| CN114278099B (en) * | 2021-11-29 | 2023-04-07 | 中交世通(重庆)重工有限公司 | Prestress steel structure tool rod piece system |
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| CN104818861A (en) * | 2013-08-03 | 2015-08-05 | 叶香竹 | Pre-stress floor reinforcement method |
| CN203904835U (en) * | 2014-04-29 | 2014-10-29 | 北京市第三建筑工程有限公司 | Integrated external prestressing tendon steering saddle |
| CN105178624A (en) * | 2015-06-30 | 2015-12-23 | 项剑锋 | Prestress wall removing technology implemented by aid of non-binding steel strands |
| CN105332521A (en) * | 2015-11-15 | 2016-02-17 | 北京工业大学 | Seismic hardening additional damping and reinforcing frame connected with joint region |
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Effective date of registration: 20221208 Address after: 430000, No. 552, Guanshan 1st Road, Hongshan District, Wuhan City, Hubei Province Patentee after: THE THIRD CONSTRUCTION Co.,Ltd. OF CHINA CONSTRUCTION THIRD ENGINEERING BUREAU Patentee after: China Construction Third Engineering Bureau Science and Innovation Industry Development Co.,Ltd. Address before: 430074 No.2, guannanyuan Road, Hongshan District, Wuhan City, Hubei Province Patentee before: THE THIRD CONSTRUCTION Co.,Ltd. OF CHINA CONSTRUCTION THIRD ENGINEERING BUREAU |