CN204875563U - Bridge reinforcing apparatus based on polyurethane cement and prestressed wire rope - Google Patents
Bridge reinforcing apparatus based on polyurethane cement and prestressed wire rope Download PDFInfo
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- CN204875563U CN204875563U CN201520679517.8U CN201520679517U CN204875563U CN 204875563 U CN204875563 U CN 204875563U CN 201520679517 U CN201520679517 U CN 201520679517U CN 204875563 U CN204875563 U CN 204875563U
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- bridge
- polyurethane cement
- pressure sensor
- prestress rope
- wire rope
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Abstract
Bridge reinforcing apparatus based on polyurethane cement and prestressed wire rope relates to a bridge reinforcing apparatus, the utility model discloses a solve that current bridge reinforcing apparatus exists that the bond between fresh and hardened concretes surface strength is not enough, the dead weight increases great, tensile ability and improves not notable scheduling problem. The utility model discloses a prestressed wire rope and polyurethane cement back up coat, prestressed wire rope are installed on bridge reinforcing apparatus surface, utilize stretch -draw to hold ground tackle stretch -draw after -fixing on the stiff end ground tackle, cladding and be fixed with polyurethane cement back up coat on the prestressed wire rope, it still includes plane formula pressure sensor, burys the bridge pontic, and the tablet is on a parallel with ground, and plane formula pressure sensor surveys the variation of stresses and measures when the bridge receives load fluctuation, and plane formula pressure sensor exports the variation of stresses volume to the AD converter through pressure analog signal output end, and the data signal output of AD converter is connected with acquisition circuit's data signal input. The utility model is used for civil engineering.
Description
Technical field
The utility model relates to a kind of bridge strengthening device.
Background technology
Bridge strengthening, makes the supporting capacity of component and even total and functional performance thereof be improved by certain measure exactly, to meet new requirement.The situation continuing to use that can not meet that namely will occur for bridge processes.The reason of reinforcing have bridge durability difference and year for a long time aging, to design improper or construction quality poor etc.After bridge strengthening, the application life of bridge can be extended, with a small amount of fund input, make bridge can meet the demand of the traffic volume, the centrality of bridge investment can also be relaxed, the loss of the personnel that prevention bridge collapse causes and property.The method of reinforcing mainly is divided into superstructure reinforcing, substructure is reinforced.
Bridge strengthening difficulty of construction is comparatively large, and mainly there are the following problems:
Coherent traffic noise is had when the first, reinforcing;
The second, reinforcing needs to utilize original structure to reinforce, so reinforcement form has very large limitation;
Three, there is change and transition in the old and new's structural system, should be noted that the combination on the old and new's pontic mating face;
Four, the bridge major part needed reinforcement is unsafe bridge, and structure is in unfavoured state, lacks design data and construction note, be difficult to determine its stressed limit, bring risk to old bridge reinforcement old bridge.
At present, conventional bridge reinforcing method has increases method of section, bonding steel plate method, stickup composite fibre method etc.These methods all have some limitations, resistance to compression or the shear resistant capacity of depth of section and thickness raising component is increased as passed through when increasing method of section, but easily occur the problem of New-old concrete joint surface strength deficiency, and deadweight increases comparatively large, resistance to tension improves not obvious; Paste tensile strength and rigidity that composite fibre method can make full use of carbon fibre material brilliance, but easily occur coming off, globality is poor, and anti-pressure ability is not enough.When using said method to reinforce bridge, usually response lag effect occurs, can not give full play to the characteristic of reinforcement material, therefore above method is referred to as passive reinforcement method.
Utility model content
The utility model object is that existing highway bridge bracing means exists New-old concrete joint surface strength deficiency in order to solve, deadweight increases comparatively large, resistance to tension and improves the problems such as not obvious, provides a kind of bridge strengthening device based on polyurethane cement and prestress rope.
Bridge strengthening device based on polyurethane cement and prestress rope described in the utility model, it comprises N number of prestress rope and polyurethane cement back-up coat, N number of prestress rope is arranged on bridge strengthening apparatus surface, be fixed on after utilizing the stretch-draw of stretching end ground tackle on fixed end ground tackle, all coated and be fixed with polyurethane cement back-up coat on each prestress rope, described N is positive integer;
It also comprises planar pressure sensor, planar pressure sensor is imbedded in the pontic of bridge, the tablet of planar pressure sensor is parallel to ground, planar pressure sensor is measuring STRESS VARIATION amount during load change suffered by bridge, planar pressure sensor exports STRESS VARIATION amount to A/D converter by pressure simulation signal output part, and the digital signal output end of A/D converter is connected with the digital signal input end of Acquisition Circuit.
Advantage of the present utility model: the bridge strengthening application of installation based on polyurethane cement and prestress rope of the present invention prestress rope and polyurethane cement material two kinds of reinforcement materials, simple equipment is adopted to carry out stretch-draw, breaching the combination of traditional mortar and the reinforcing bar in the past studied, is a kind of Technology Bridge Strengthening innovated to some extent.This reinforcing technique is applicable to the reinforcing of building construction and other fabric structures simultaneously.The utility model not only can improve normal operating condition ultimate bearing capacity, can also realize the strengthen maintenance engineering under uninterrupted traffic operation condition.
The utility model is the bridge reinforcing method of active enforcement, affects and changes the internal force distribution of original structure, thus reduce the original stress level of bridge construction and improve the supporting capacity of bridge, having reinforcings, unloading and triple effects of change structure internal force; The reinforcement system that NEW TYPE OF COMPOSITE mortar and minor diameter prestress wire are formed is analyzed, breaches the combination such as traditional mortar and reinforcing bar in the past studied; Find the Changing Pattern that bonded prestress reinforcement means affects old bridge, at identical control stress for prestressing, under identical presstressed reinforcing steel area, to less across footpath, the beam that reinforcement ratio is lower, cracking resistance improves comparatively large, becomes non-linear increase to different control stress for prestressing with raising ratio under presstressed reinforcing steel area; Formulate the constructure scheme of this kind of bracing means and proposed corresponding examination criteria; As ground tackle makes and fixing, minor diameter steel strand tension tonnage, method etc.
Accompanying drawing explanation
Fig. 1 is the structural representation of the bridge strengthening device based on polyurethane cement and prestress rope described in the utility model;
Fig. 2 is the sectional drawing of stretching end ground tackle described in the utility model;
Fig. 3 is the sectional drawing of fixed end ground tackle described in the utility model;
Fig. 4 is the electrical block diagram of the bridge strengthening device based on polyurethane cement and prestress rope described in the utility model.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described below in conjunction with Fig. 1 and Fig. 4, based on the bridge strengthening device of polyurethane cement and prestress rope described in present embodiment, it comprises N number of prestress rope 1 and polyurethane cement back-up coat 2, N number of prestress rope 1 is arranged on bridge strengthening apparatus surface, be fixed on after utilizing stretching end ground tackle 3 stretch-draw on fixed end ground tackle 4, all coated and be fixed with polyurethane cement back-up coat 2 on each prestress rope 1, described N is positive integer;
It also comprises planar pressure sensor 11, planar pressure sensor 11 is imbedded in the pontic of bridge, the tablet of planar pressure sensor 11 is parallel to ground, planar pressure sensor 11 is measuring STRESS VARIATION amount during load change suffered by bridge, planar pressure sensor 11 exports STRESS VARIATION amount to A/D converter 12 by pressure simulation signal output part, and the digital signal output end of A/D converter 12 is connected with the digital signal input end of Acquisition Circuit 13.
In present embodiment, planar pressure sensor 11 is adopted to gather the STRESS VARIATION amount of bridge when suffered load change, determine to need reinforcement according to STRESS VARIATION amount the quantity N of prestress rope 1 that bridge uses, the very few effect affecting bridge strengthening of the quantity of N, the quantity of N too much increases reinforcement cost.
Detailed description of the invention two: present embodiment is described below in conjunction with Fig. 1, present embodiment is described further embodiment one, and the diameter of prestress rope 1 is 4mm ~ 8mm.
Detailed description of the invention three: present embodiment is described below in conjunction with Fig. 2 and Fig. 3, present embodiment is described further embodiment one, and stretching end ground tackle 3 is welded on the first steel plate 5, and the first steel plate 5 is fixed in bridge beam body by bolt 6; Fixed end ground tackle 4 is welded on the second steel plate 8, and the second steel plate 8 is fixed in bridge beam body by bolt 6.
Detailed description of the invention four: present embodiment is described below in conjunction with Fig. 1, present embodiment is described further embodiment one, and M expansion bolt 7 is implanted in the outside of polyurethane cement back-up coat 2, and described M is positive integer.
In the utility model, make the strength and stiffness improving concrete beam based on the bridge strengthening device of polyurethane cement and prestress rope and the acting in conjunction of raw steel Concrete Beam Reinforced, thus the structure of guarantee bridge is continued to use, and reaches safety, is suitable for, the requirement of durability.
Bridge surface porosity part should be removed before repair bridge is pasted, to exposing concrete, if there is crack, should repair in advance, concrete surface layer being repaired smooth with patching material, require that planeness reaches 5mm.
In the present invention, polyurethane cement back-up coat 2 adopts polyurethane cement composite material, and polyurethane cement composite material is formed by PEPA, isocyanates, cement, foamicide and catalyst mix; The mass ratio of PEPA and isocyanates is 1:1; The mass ratio of PEPA and cement is 1:2; The mass ratio of PEPA and foamicide is 1:0.003; The mass ratio of PEPA and catalyzer is 1:0.00005.
Claims (4)
1. based on the bridge strengthening device of polyurethane cement and prestress rope, it is characterized in that, it comprises N number of prestress rope (1) and polyurethane cement back-up coat (2), N number of prestress rope (1) is arranged on bridge strengthening apparatus surface, be fixed on fixed end ground tackle (4) after utilizing stretching end ground tackle (3) stretch-draw, all coated and be fixed with polyurethane cement back-up coat (2) on each prestress rope (1), described N is positive integer;
It also comprises planar pressure sensor (11), planar pressure sensor (11) is imbedded in the pontic of bridge, the tablet of planar pressure sensor (11) is parallel to ground, planar pressure sensor (11) is measuring STRESS VARIATION amount during load change suffered by bridge, planar pressure sensor (11) exports STRESS VARIATION amount to A/D converter (12) by pressure simulation signal output part, and the digital signal output end of A/D converter (12) is connected with the digital signal input end of Acquisition Circuit (13).
2. the bridge strengthening device based on polyurethane cement and prestress rope according to claim 1, it is characterized in that, the diameter of prestress rope (1) is 4mm ~ 8mm.
3. the bridge strengthening device based on polyurethane cement and prestress rope according to claim 1, it is characterized in that, stretching end ground tackle (3) is welded on the first steel plate (5), and the first steel plate (5) is fixed in bridge beam body by bolt (6); Fixed end ground tackle (4) is welded on the second steel plate (8), and the second steel plate (8) is fixed in bridge beam body by bolt (6).
4. the bridge strengthening device based on polyurethane cement and prestress rope according to claim 1, is characterized in that, M expansion bolt (7) is implanted in the outside of polyurethane cement back-up coat (2), and described M is positive integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520679517.8U CN204875563U (en) | 2015-09-02 | 2015-09-02 | Bridge reinforcing apparatus based on polyurethane cement and prestressed wire rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520679517.8U CN204875563U (en) | 2015-09-02 | 2015-09-02 | Bridge reinforcing apparatus based on polyurethane cement and prestressed wire rope |
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| Publication Number | Publication Date |
|---|---|
| CN204875563U true CN204875563U (en) | 2015-12-16 |
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| CN201520679517.8U Expired - Fee Related CN204875563U (en) | 2015-09-02 | 2015-09-02 | Bridge reinforcing apparatus based on polyurethane cement and prestressed wire rope |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735155A (en) * | 2016-04-29 | 2016-07-06 | 郑悦 | Bridge mid-span droop reinforcing device and construction method thereof |
| CN106320191A (en) * | 2016-08-31 | 2017-01-11 | 西安公路研究院 | Pre-tensioning steel wire and polymer mortar externally-added layer reinforcing device |
| CN106758880A (en) * | 2016-04-29 | 2017-05-31 | 夏玉娟 | A kind of sagging bracing means of bridge and its construction method |
| CN106869039A (en) * | 2017-04-06 | 2017-06-20 | 东北林业大学 | A kind of method of utilization polyurethane concrete material and Steel Thin-Wall sleeve reinforcement circular section bridge pier |
| CN108708304A (en) * | 2018-08-10 | 2018-10-26 | 山东交通学院 | A kind of compound Shear Strengthening construction of old T-type beam bridge steel wire rope MPC and construction method |
| CN112176889A (en) * | 2020-10-14 | 2021-01-05 | 山东交通学院 | Device for reinforcing hollow slab bridge based on composite material and construction process |
-
2015
- 2015-09-02 CN CN201520679517.8U patent/CN204875563U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735155A (en) * | 2016-04-29 | 2016-07-06 | 郑悦 | Bridge mid-span droop reinforcing device and construction method thereof |
| CN106758880A (en) * | 2016-04-29 | 2017-05-31 | 夏玉娟 | A kind of sagging bracing means of bridge and its construction method |
| CN106320191A (en) * | 2016-08-31 | 2017-01-11 | 西安公路研究院 | Pre-tensioning steel wire and polymer mortar externally-added layer reinforcing device |
| CN106869039A (en) * | 2017-04-06 | 2017-06-20 | 东北林业大学 | A kind of method of utilization polyurethane concrete material and Steel Thin-Wall sleeve reinforcement circular section bridge pier |
| CN108708304A (en) * | 2018-08-10 | 2018-10-26 | 山东交通学院 | A kind of compound Shear Strengthening construction of old T-type beam bridge steel wire rope MPC and construction method |
| CN112176889A (en) * | 2020-10-14 | 2021-01-05 | 山东交通学院 | Device for reinforcing hollow slab bridge based on composite material and construction process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20160902 |