CN208183560U - A kind of structure construction of prestressing force Shear Strengthening box beam - Google Patents
A kind of structure construction of prestressing force Shear Strengthening box beam Download PDFInfo
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- CN208183560U CN208183560U CN201820531033.2U CN201820531033U CN208183560U CN 208183560 U CN208183560 U CN 208183560U CN 201820531033 U CN201820531033 U CN 201820531033U CN 208183560 U CN208183560 U CN 208183560U
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- shearing resistance
- box beam
- resistance muscle
- prestressing force
- heating coil
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Abstract
A kind of structure construction of prestressing force Shear Strengthening box beam, installation anchor block is respectively corresponded above and below in the web two sides of the chamber of box beam, shearing resistance muscle is fixed between two anchor blocks, prefabricated open type electromagnetic heating coil surrounding wraps up shearing resistance muscle, open type electromagnetic heating coil is connected to heating host and variable-frequency power sources, temperature controller connects temperature sensor and heating host, the measuring staff of displacement meter is in contact with shearing resistance muscle end, simultaneously by anchorage to shearing resistance muscle anchored ends, protection is arranged in the surface of shearing resistance muscle.The utility model initiative is strong, can preferably improve box girder web cracking load, there is positive contribution to web shear-carrying capacity, it is easy to operate easy to control without large-scale tensioning equipment by novel construction technology process, accuracy is high, highly-safe, substantially increases construction efficiency.
Description
Technical field
The utility model belongs to field of civil engineering, and in particular to a kind of Technology Bridge Strengthening, especially a kind of prestressing force
The structure of Shear Strengthening box beam constructs.
Background technique
The inclined crack of box girder web is one of the major cracks that prestress box beam generates, especially cast-in-place close to end bay
Two coxostermums in box beam end range will appear 45 ° of diagonal crack, enable the integrally-built shear resistance of box beam, anti-torsion
The even structural bearing capacity decline of power, span ability.Therefore the problem of bridge strengthening, becomes increasingly conspicuous, existing box beam Shear Strengthening skill
Art has bonding steel plate method, increase web inside cross-sectional, external prestressing steels reinforcing etc..
Chinese patent authorization publication number: CN 101230562A discloses a kind of the external pre- of prestressed concrete box-beam bridge
Stress reinforcing method, method are: anchoring and steering using the space truss being mounted in box beam as external pre-stress bundle
Construction.Steering and anchoring needs of the steel truss according to external pre-stress bundle, along vertical bridge, to step-by-step arrangement, prestressing tendon is needed in vitro
It turns to and anchors or the region of cracking in webs, its chord member that winds up passes through upper integral node plate and box beam top plate phase along direction across bridge
Connection, lower edge chord member are connected by lower integral node plate with box beam bottom plate, and upper integral node plate is worn with lower integral node plate
Hole to position external pre-stress bundle, by stiffening construction handle with local anchoring structure processing realize external pre-stress bundle damping,
It turns to and anchors function, respectively arrange a Pin longitudiual truss against web side in box beam, laterally connection is set in longitudiual truss bracket
Clone reinforces the globality of truss, provides space for the anchoring of external pre-stress bundle.The disadvantage of this invention is that step is multiple
Miscellaneous, difficulty of construction is high, site operation low efficiency, especially in chamber inner stretch-draw prestressing force beam, not in view of tensioning space is asked
Topic, tensioning low efficiency are reinforced according to bonding steel plate method, although can achieve effective reinforcing purpose, influence is beautiful, if
Using increase web inside cross-sectional, then increase the self weight of box beam, influence using.
By the anchoring prestress shearing resistance muscle on the inside of the web of chamber, box girder web cracking load can be preferably improved,
There is positive contribution to web shear-carrying capacity, while weakened web can be prevented and further developed.
Summary of the invention
The purpose of the utility model is to provide a kind of structure of prestressing force Shear Strengthening box beam construction, the wounds of the utility model
New point is to heat shearing resistance muscle by electromagnetic induction heating technology, prestressing force is generated after anchoring is cooling, by controlling heating temperature
Prestressing force size is determined with shearing resistance muscle elongation, without large-scale tensioning equipment, in narrow chamber space, construction
It is convenient easy to control, it is highly-safe, under the premise of not influencing box beam sight, substantially increase construction efficiency.
The technical solution of the utility model are as follows: the utility model provides a kind of structure structure of prestressing force Shear Strengthening box beam
It makes, respectively corresponds installation anchor block above and below in the web two sides of the chamber of box beam, pass through implantation chemistry between anchor block and web
Bolt closely connects, and anchor block is that reinforced concrete block or steel construction block make, and is fixed temporarily shearing resistance between two anchor blocks
Muscle, prefabricated open type electromagnetic heating coil wrap shearing resistance muscle surrounding, open type electromagnetic heating coil be round screw thread around
One of open type electromagnetic heating coil or the U-shaped electromagnetic heating coil of half opening formula, the connection of open type electromagnetic heating coil
To heating host, the high frequency magnetic field that variable-frequency power sources generates enables to shearing resistance muscle voluntarily fast heating, and temperature controller control electromagnetism adds
Hot temperature, displacement meter control shearing resistance muscle elongation, while by anchorage to shearing resistance muscle anchored ends, the surface setting of shearing resistance muscle is anti-
Shield.
In implementation method, the utility model the following steps are included:
1) chamber web two sides are cleared up: cleaning polishing being carried out to the web two sides of the chamber of box beam, removes loose material；
2) install anchor block: in web two sides, difference upper and lower corresponding installs anchor block, passes through plant between anchor block and web
Enter chemical bolt closely to connect, anchor block is that reinforced concrete block or steel construction block make；
3) it is fixed temporarily shearing resistance muscle: shearing resistance muscle being temporarily fixed between upper and lower anchor block by anchorage；
4) it wraps up open type electromagnetic heating coil: prefabricated open type electromagnetic heating coil is wrapped in upper and lower anchoring
On shearing resistance muscle between block, is spliced according to the open type electromagnetic heating coil that the length of shearing resistance muscle chooses different length, opened
Mouth formula electromagnetic heating coil is round screw thread in open type electromagnetic heating coil or the U-shaped electromagnetic heating coil of half opening formula
It is a kind of.
5) displacement meter and temperature controller are installed: displacement meter being installed at the shearing resistance muscle both ends being fixed temporarily, the measuring staff of displacement meter with
Shearing resistance muscle end is in contact, the mounting temperature sensor on the inside of open type electromagnetic heating coil, and is connected on temperature controller；
6) connection heating host: assembled good open type electromagnetic heating coil, displacement meter and temperature controller are connected by conducting wire
It is connected to heating host, heating host is the aggregate of displacement measurement system, temperature measurement system and power control system；
7) lead to variable-frequency power sources: heating host is connected in variable-frequency power sources；
8) it heats shearing resistance muscle: opening power supply, the alternating magnetic field generated by electric current in shearing resistance muscle makes its spontaneous heating, and produces
Raw corresponding elongation；
9) it anchors shearing resistance muscle: after shearing resistance muscle adds thermogenetic elongation to meet the requirements, cutting off the power, and with anchorage by shearing resistance
Muscle anchored ends are on anchor block；
10) cooling: to remove all devices, generate prestressing force after shearing resistance muscle is completely cooling；
11) it protects: antiseptic and rustproof coating safeguard measure is applied to exposed shearing resistance muscle.
The anchor block is that reinforced concrete block or steel construction block make, and steel construction block is led to by steel plate and several ribbed stiffeners
Cross solder design power transmission, the horizontal steel plate of steel construction block is equipped with for the through-hole through shearing resistance muscle, and ribbed stiffener quantity according to answering in advance
Power size requirements are arranged in shearing resistance muscle two sides.
The shearing resistance muscle is metal ribs, and specification is required according to different shearing resistances and used.
The open type electromagnetic heating coil is that pre-production is good, there is the standard paragraphs of different-diameter and length, so as to
The shearing resistance muscle for wrapping up different size, by metal shell, heating coil, insulating layer, high temperature cloth, closing device and outgoing line device group
At.
The displacement meter is connected on heating host, and when the elongation of shearing resistance muscle exceeds limit value, heating host can
It automaticallys cut off the power, stops electromagnetic heating coil heating.
Described temperature controller one end connects temperature sensor, and the other end is connected with heating host, after electrified regulation, temperature control
Device can control shearing resistance muscle heating temperature and remain constant.
The utility model proposes a kind of method of new prestressing force Shear Strengthening box beam, shearing resistance excellent effects, compared to biography
The pre-stress stretching method of system, the utility model use electromagnetic induction heating technology, heat shearing resistance muscle, generate after anchoring is cooling pre-
Stress, easy to operate in chamber, and speed is fast, high-efficient, the duration is greatly saved in when field application.The utility model is opposite
In increase web inside cross-sectional method in the prior art and bonding steel plate method, there is following remarkable advantage:
(1) by adding vertical prestressing shearing resistance muscle on the inside of the web of chamber, initiative is strong, can preferably improve case
Web cracking load has positive contribution to web shear-carrying capacity.
(2) it avoids and too greatly increases the self weight of bridge cabinet, shearing resistance well is played under the premise of not affecting the appearance and is added
Gu effect.
(3) technique, more traditional jack tension prestressing force are realized using the novel prestressing force of electromagnetic induction heating technology
Technology has the features such as easy to operate easy to control, accuracy height, highly-safe, narrow while reaching same effect
In chamber, without large-scale tensioning equipment, a collection of shearing resistance muscle can be heated simultaneously, and heating speed is fast, it is natural after anchoring
It is cooling, that is, it can produce prestressing force, construction efficiency is high, saves the duration, does not influence the normal traffic traveling of bridge floor.
(4) electromagnetic induction heating technology is used, prestressing force size can be precisely controlled.
The shear-carrying capacity that the utility model can be applied to box beam is insufficient, the bridge Shear Strengthening of diagonal crack disease occurs,
Engineering application value with higher and significant ground economic benefit.
Detailed description of the invention:
Fig. 1 is a kind of process flow chart of the structure construction of prestressing force Shear Strengthening box beam；
Fig. 2 is a kind of box girder segment elevational schematic view of the structure construction of prestressing force Shear Strengthening box beam；
Fig. 3 is a kind of box beam schematic cross-sectional view of the structure construction of prestressing force Shear Strengthening box beam；
Fig. 4 is the box beam schematic longitudinal section that a kind of structure construction complete of prestressing force Shear Strengthening box beam is reinforced；
Fig. 5 is a kind of electromagnetic induction heating shearing resistance muscle device installation signal of the structure construction of prestressing force Shear Strengthening box beam
Figure；
Fig. 6 is a kind of electromagnetic induction heating shearing resistance muscle principle of device frame of the structure construction of prestressing force Shear Strengthening box beam
Figure；
Fig. 7 is a kind of shearing resistance muscle structural schematic diagram of the structure construction of prestressing force Shear Strengthening box beam；
Fig. 8 is a kind of anchor block schematic diagram of a pair of of steel construction block of the structure construction of prestressing force Shear Strengthening box beam；
Fig. 9 is a kind of half opening formula electromagnetic heating coil structure signal of the structure construction of prestressing force Shear Strengthening box beam
Figure；
Figure 10 is a kind of open type electromagnetic heating coil structure signal of the structure construction of prestressing force Shear Strengthening box beam
Figure；
In the accompanying drawings, 1 is box beam；11 be web；2 be anchor block；21 be steel plate；22 be ribbed stiffener；23 be weld seam；3 are
Anchorage, 4 be shearing resistance muscle；5 be open type electromagnetic heating coil；50 be the U-shaped electromagnetic heating coil of half opening formula；500 be round spiral shell
Curl up open type electromagnetic heating coil；51 be metal shell；52 be heating coil；53 be insulating layer；54 be high temperature cloth；55 are
Closing device；56 be outgoing line device；6 be temperature controller；61 be temperature sensor；7 be displacement meter；8 be heating host；9 be frequency conversion
Power supply.
Specific embodiment:
For a clearer understanding of the technical features, objectives and effects of the utility model, now compareing Detailed description of the invention
Specific embodiment of the present utility model.The utility model provides a kind of structure construction of prestressing force Shear Strengthening box beam, in case
11 two sides of web of the chamber of beam 1 respectively correspond installation anchor block 2 above and below, pass through implantation chemistry between anchor block 2 and web 11
Bolt closely connects, and anchor block 2 is that reinforced concrete block or steel construction block make, and is fixed temporarily between two anchor blocks 2 anti-
Muscle 4 is cut, prefabricated open type electromagnetic heating coil 5 wraps 4 surrounding of shearing resistance muscle, and open type electromagnetic heating coil 5 is circle
One of spiral winding open type electromagnetic heating coil 500 or the U-shaped electromagnetic heating coil 50 of half opening formula, open type electromagnetism adds
Heat coil 5 is connected to heating host 8, and the high frequency magnetic field that variable-frequency power sources 9 generates enables to the voluntarily fast heating of shearing resistance muscle 4, temperature
It controls device 6 and controls electromagnetic heating temperature, displacement meter 7 controls 4 elongation of shearing resistance muscle, while by anchorage 3 to 4 both ends anchor of shearing resistance muscle
Fixed, protection is arranged in the surface of shearing resistance muscle 4.
In implementation method, the utility model the following steps are included:
1) chamber web two sides are cleared up: cleaning polishing being carried out to 11 two sides of web of the chamber of box beam 1, using pressure-air
And alcohol, acetone soln remove the dust and loose material of 11 inside of web；
2) anchor block is installed: in 11 drilling on inner side of web, clearing up duct, makes a pair of of anchoring up and down by being implanted into chemical bolt
It is closely connected between block 2 and web 11, the distance between upper and lower anchor block 2 takes 11 vertical direction maximum shearing resistance range of web, anchor
Gu block 2 is that reinforced concrete block or steel construction block make；
3) it is fixed temporarily shearing resistance muscle: it is required that the shearing resistance muscle 4 of specification is through in the through-hole of the anchor block 2 of about 11 web,
4 length of shearing resistance muscle is greater than the distance between upper and lower anchor block 2, and each length in reserve in two sides is fixed in order to anchorage 3, slightly by anchorage 3
Shearing resistance muscle 4 is slightly clamped, is temporarily fixed at it between two anchor blocks 2；
4) it wraps up open type electromagnetic heating coil: prefabricated open type electromagnetic heating coil 5 is wrapped in upper and lower anchoring
On shearing resistance muscle 4 between block 2, spelled according to the open type electromagnetic heating coil 5 that the length of shearing resistance muscle 4 chooses different length
It connects, open type electromagnetic heating coil 5 is that round screw thread adds around open type electromagnetic heating coil 500 or the U-shaped electromagnetism of half opening formula
One of heat coil 50.
5) displacement meter and temperature controller are installed: displacement meter 7, the measuring staff of displacement meter 7 being installed at 4 both ends of shearing resistance muscle being fixed temporarily
It is in contact with 4 end of shearing resistance muscle, in 5 inside mounting temperature sensor 61 of open type electromagnetic heating coil, and is connected to temperature controller 6
On；
6) connection heating host: assembled good open type electromagnetic heating coil 5, displacement meter 7 and temperature controller 6 pass through conducting wire
It is connected to heating host 8, displacement meter 7 and temperature controller 6 are all connected to heating host 8, and heating host 8 is displacement measurement system, temperature
Spend the aggregate of measuring system and power control system；
7) lead to variable-frequency power sources: heating host 8 is connected in variable-frequency power sources 9；
8) it heats shearing resistance muscle: opening power supply, the alternating magnetic field generated by electric current in shearing resistance muscle 4 makes its spontaneous heating, and produce
Raw corresponding elongation；
9) it anchors shearing resistance muscle: after the conversion by prestressing force and elongation, the limit of elongation is set on heating host 8
Value is cut off the power when the elongation generated after the heating of shearing resistance muscle 4 meets the requirements or exceeds limit value, then immediately will with anchorage 3
4 anchored ends of shearing resistance muscle are on anchor block 2；
10) cooling: to remove all devices, generate prestressing force after shearing resistance muscle 4 is completely cooling；
11) it protects: antiseptic and rustproof coating safeguard measure is applied to exposed shearing resistance muscle 4.
The anchor block 2 is that reinforced concrete block or steel construction block make, and steel construction block is by steel plate 21 and several puts more energy into
Rib 22 connects power transmission by weld seam 23, and the horizontal steel plate of steel construction block is equipped with for the through-hole through shearing resistance muscle 4, the number of ribbed stiffener 22
Amount is arranged according to prestressing force size requirements in 4 two sides of shearing resistance muscle.
The shearing resistance muscle 4 is metal ribs, and specification is required according to different shearing resistances and used.
The open type electromagnetic heating coil 5 is that pre-production is good, there is the standard paragraphs of different-diameter and length, so as to
The shearing resistance muscle 4 for wrapping up different size, by metal shell 51, heating coil 52, insulating layer 53, high temperature cloth 54, closing device 55
It is formed with outgoing line device 56.
The displacement meter 7 is connected on heating host 8, when the elongation of shearing resistance muscle 4 exceeds limit value, heats host 8
It can automatically cut off the power, stop electromagnetic heating coil heating.
Described 6 one end of temperature controller connects temperature sensor 61, and the other end is connected with heating host 8, after electrified regulation,
Temperature controller 6 can control 4 heating temperature of shearing resistance muscle and remain constant.
Claims (8)
1. a kind of structure of prestressing force Shear Strengthening box beam constructs, it is characterized in that web (11) two sides of the chamber in box beam (1)
Installation anchor block (2) is respectively corresponded above and below, is closely connect between anchor block (2) and web (11) by being implanted into chemical bolt, anchor
Gu block (2) is that reinforced concrete block or steel construction block make, shearing resistance muscle (4) are fixed between two anchor blocks (2), prefabricated opens
Mouth formula electromagnetic heating coil (5) surrounding package shearing resistance muscle (4), open type electromagnetic heating coil (5) are round screw thread around open
One of formula electromagnetic heating coil (500) or the U-shaped electromagnetic heating coil of half opening formula (50), open type electromagnetic heating coil
(5) it is connected to heating host (8) and variable-frequency power sources (9), temperature controller (6) connects temperature sensor (61) and heating host (8), position
The measuring staff for moving meter (7) is in contact with shearing resistance muscle (4) end, while by anchorage (3) to shearing resistance muscle (4) anchored ends, shearing resistance muscle
(4) protection is arranged in surface.
2. a kind of structure construction of prestressing force Shear Strengthening box beam as described in claim 1, it is characterised in that the shearing resistance
Displacement meter (7) are installed at muscle (4) both ends, are equipped with temperature sensor (61) on the inside of open type electromagnetic heating coil (5), and temperature passes
Sensor (61) is connect with temperature controller (6).
3. a kind of structure construction of prestressing force Shear Strengthening box beam as described in claim 1, it is characterised in that the opening
Formula electromagnetic heating coil (5), displacement meter (7) and temperature controller (6) are wired to heating host (8), heat host (8)
For the aggregate of displacement measurement system, temperature measurement system and power control system.
4. a kind of structure construction of prestressing force Shear Strengthening box beam as described in claim 1, it is characterised in that the anchoring
Block (2) is that reinforced concrete block or steel construction block make, and steel construction block passes through weld seam by steel plate (21) and several ribbed stiffeners (22)
(23) connect power transmission, the horizontal steel plate of steel construction block is equipped with for the through-hole through shearing resistance muscle (4), ribbed stiffener (22) quantity according to
Prestressing force size requirements are arranged in shearing resistance muscle (4) two sides.
5. a kind of structure construction of prestressing force Shear Strengthening box beam as described in claim 1, it is characterised in that the shearing resistance
Muscle (4) is metal ribs.
6. a kind of structure construction of prestressing force Shear Strengthening box beam as described in claim 1, it is characterised in that the opening
Formula electromagnetic heating coil (5) is that pre-production is good, by metal shell (51), heating coil (52), insulating layer (53), high temperature
Cloth (54), closing device (55) and outgoing line device (56) composition.
7. a kind of structure construction of prestressing force Shear Strengthening box beam as described in claim 1, it is characterised in that the displacement
Meter (7) is connect with heating host (8).
8. a kind of structure construction of prestressing force Shear Strengthening box beam as described in claim 1, it is characterised in that the temperature control
Device (6) one end connects temperature sensor (61), and the other end is connected with heating host (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820531033.2U CN208183560U (en) | 2018-04-09 | 2018-04-09 | A kind of structure construction of prestressing force Shear Strengthening box beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820531033.2U CN208183560U (en) | 2018-04-09 | 2018-04-09 | A kind of structure construction of prestressing force Shear Strengthening box beam |
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| CN208183560U true CN208183560U (en) | 2018-12-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610349A (en) * | 2018-12-29 | 2019-04-12 | 北京工业大学 | A kind of the PC box girder web ruggedized construction and method of built-in tiltedly netting piece |
| CN113605207A (en) * | 2021-08-11 | 2021-11-05 | 长安大学 | Corrugated steel web plate combined box girder, suspension splicing nondestructive positioning device and construction method |
-
2018
- 2018-04-09 CN CN201820531033.2U patent/CN208183560U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610349A (en) * | 2018-12-29 | 2019-04-12 | 北京工业大学 | A kind of the PC box girder web ruggedized construction and method of built-in tiltedly netting piece |
| CN109610349B (en) * | 2018-12-29 | 2020-09-25 | 北京工业大学 | PC box girder web plate reinforcing structure with built-in obliquely-woven mesh and method |
| CN113605207A (en) * | 2021-08-11 | 2021-11-05 | 长安大学 | Corrugated steel web plate combined box girder, suspension splicing nondestructive positioning device and construction method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhenjiang Heng An Civil Technology Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: 2018320000418 Denomination of utility model: A kind of structure construction of prestressing force Shear Strengthening box beam Granted publication date: 20181204 License type: Common License Record date: 20181219 Assignee: Hefei Shuang Dao run Highway Engineering Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: 2018320000417 Denomination of utility model: A kind of structure construction of prestressing force Shear Strengthening box beam Granted publication date: 20181204 License type: Common License Record date: 20181219 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Limited by Share Ltd Beijing nine road detection technology Assignor: Nanjing Forestry University Contract record no.: X2019320000056 Denomination of utility model: Structure structure that prestressing force shears and consolidates case roof beam Granted publication date: 20181204 License type: Common License Record date: 20190912 |