CN102051862A - FRP sheet and method of reinforcing bridge pier therewith - Google Patents
FRP sheet and method of reinforcing bridge pier therewith Download PDFInfo
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- CN102051862A CN102051862A CN2009102128390A CN200910212839A CN102051862A CN 102051862 A CN102051862 A CN 102051862A CN 2009102128390 A CN2009102128390 A CN 2009102128390A CN 200910212839 A CN200910212839 A CN 200910212839A CN 102051862 A CN102051862 A CN 102051862A
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Abstract
An FRP (fiber-reinforced composites) sheet and a method of reinforcing a bridge pier with the sheet belong to the technical field of bridge construction. The FRP sheet comprises a sheet body 1, and is characterized in that holes 11 are formed in the sheet body 1 at intervals to form a mesh-like structure. The FRP sheet has the advantages that the FRP sheet is suitable for reinforcement of underwater structures by changing the structure of an FRP sheet of the prior art into the mesh-like structure, and the purpose of good service durability is achieved. The method has the advantages of simple construction technology and low cost, especially, normal navigation of a water area is guaranteed during construction.
Description
Technical field
The invention belongs to technical field of bridge construction, be specifically related to a kind of FRP sheet material, and relate to the method for reinforcing underwater foundation with this sheet material.
Background technology
Research and use shows, FRP sheet material (fibre reinforced composites) has advantages such as lightweight, high-strength, anticorrosive and good endurance, and therefore, at military project and space flight and even civil area, especially the application in civil engineering is developed rapidly.But, because the FRP sheet material can not be used for the reinforcing of wet environment and underwater structures, so when structures such as reinforcement bridge bridge pier, expose limitation.How making the FRP sheet material be applicable to wet environment and even occasion under water, is the technical problem that industry is paid close attention to all the time.
Summary of the invention
Top priority of the present invention be to provide a kind of can be suitable for reinforcing underwater structure, light weight and FRP sheet material good endurance, the consolidation effect excellence.
Task of the present invention also provides a kind of method of reinforcing underwater foundation with the FRP sheet material, and this method construction is simple, and short construction period does not influence normal navigation in construction period.
Finish top priority of the present invention for embodiment, the technical scheme that the present invention recommended is: a kind of FRP sheet material, comprise sheet body 1, and it is characterized in that cloth hole 11 constitutes latticed between on the described sheet body 1.
In a specific embodiment of the present invention, the material of described sheet body 1 is a carbon fiber, glass fiber, any one in aramid fiber or the basalt fibre.
In another specific embodiment of the present invention, described hole 11 is any one in rectangular opening or the circular port.
Go back in the specific embodiment of the present invention, described hole 11 is a rectangular opening.
In another specific embodiment of the present invention, the physical dimension of described sheet body 1 is 50 * 50mm or 100 * 100mm.
Finish an also task of the present invention for embodiment, right scheme provided by the present invention is: a kind of method of reinforcing underwater foundation with the FRP sheet material, and this method may further comprise the steps:
A) preparation of construction, according to construction drawing, determine to select for use corresponding specification between the sheet body 1 of cloth porose 11;
B) handle in earlier stage being reinforced thing, the attachment of the concrete surface of cylinder in the water is removed and the silt displacement at suspension column place;
C) make anchor hole, in water, be drilled with anchor hole on the concrete of cylinder;
D) sheet body 1 is installed, the latticed sheet body 1 usefulness securing member of a cloth porose 11 is fixed on the anchor hole;
E) steel sleeve is installed, steel sleeve is nested with outside sheet body 1, the indwelling spacing between control steel sleeve and the sheet body 1, and make steel sleeve top lean out the water surface;
F) cast is with the exterior bottom of concrete pouring to the first segment steel sleeve;
G) draw water, water in the steel sleeve is taken out to the greatest extent;
H) grouting pours into underwater epoxy resin or the high mortar that flows between steel sleeve and the sheet body 1;
I) reclaim steel sleeve, through the slurry intensity in the steel sleeve is detected and reach qualified after, steel sleeve is reclaimed.
The degree of depth of the anchor hole in another specific embodiment of the present invention, step C) is 30 times of diameter of the vertical muscle of grid of formed grid on the sheet body 1.
More of the present invention and in specific embodiment, step D) securing member described in is an anchor bolt.
In of the present invention and then specific embodiment, step e) the indwelling spacing described in is 30-200mm, and the described water surface that leans out is the distance 〉=0.5m that leans out the water surface.
In again of the present invention and then specific embodiment, step F) concrete described at the thickness of the exterior bottom of first segment steel sleeve is 〉=0.5m.
The advantage of the technical scheme that the present invention recommended: by the FRP sheet structure in the existing technology is changed into latticed structure, therefore can be suitable for the reinforcing of underwater structures, and can reach good endurance, it is simple that method has construction technology, cost is low, and being does not especially influence the waters normally to open the navigation or air flight when construction.
Description of drawings
Fig. 1 is a specific embodiment structure chart of FRP sheet material of the present invention.
Fig. 2 is the construction flow chart of the inventive method.
Fig. 3 is the schematic diagram that utilizes after the inventive method is reinforced underwater foundation.
The specific embodiment:
Utilize structure shown in Figure 1 that underwater foundation is reinforced and present state shown in Figure 3 according to flow process shown in Figure 2.
A) preparation of construction
Collect and read over the construction drawing for the treatment of strenthening member 7, the actual state of strenthening member is treated in site inspection, draft constructure scheme and Construction Plan, prepare respective material and facility, determine to select for use by specification shown in Figure 1 be 100 * 100mm between the latticed sheet body 1 of cloth porose 11;
B) handle in earlier stage being reinforced thing, specifically: the heavy silt of column body concrete surfacing and suspension column in the water removed, by diver's operation under water, use the pneumatic pick of high pressure, giant is removed and is reinforced peeling off of component surface, loose, honeycomb, deterioration concrete such as corrosion and growing nonparasitically upon another plant the aquatic organism of concrete surface, adopt the floating layer of the body structure surface of abrasive machine polishing under water concrete mortar, expose the concrete structure layer, smooth for adopting repair materials to repair than the macroscopic void place, will carry out chamfered and be polished into circular-arcly for the structure corner, arc radius r should be less than 25mm.
The heavy silt of suspension column removed processing, should guarantee that silt displacement is clean in the outer 1m scope of suspension column diameter, expose the polycrystalline substance platform, to guarantee the quality of follow-up operation;
C) make anchor hole 3, the employing underwater shock bores, hole at the polycrystalline substance platform by the vertical muscle diameter of design pitch, precalculated position and grid and to make anchor hole 3, to satisfy the requirement that vertical FRP muscle anchors into base, drilling depth is not less than 30d (d is the vertical muscle diameter of sheet material);
D) FRP body 1 is installed, carry out the blanking of FRP sheet material by the size of designing requirement, at the grid node place ectonexine cushion block is set, pad thickness is to satisfy filler thickness inside and outside the FRP grid, and the needs of support outer tube opposing external water pressure power, the FRP grid is laid by predetermined number of layers, and the vertical FRP muscle in grid bottom is anchored into the bottom prebored hole;
E) steel sleeve 2 is installed, steel sleeve 2 is made up of two semicircles, every joint length should satisfy needs easy for installation, and to be advisable about 1m, more piece steel sleeve 2 connects by the flange bolt assembly unit, every joint steel sleeve 2 sinks under the water after the assembly unit on the water, carry out installation in place by the diver again, rubber spacer should be filled up in the junction of steel sleeve 2, to improve the sealing of steel sleeve 2, for guarantee stabilization works finish after steel sleeve 2 remove conveniently, before steel sleeve 2 is installed, tackle its inside and evenly smear interleaving agent;
F) cast, all steel sleeves 2 sink to design elevation in place after, adopt mould bag (available woven bag) concrete processing to be sealed in the steel sleeve bottom in first segment steel sleeve 2 outsides, the thickness of sealing coagulation is not less than 0.5m, the strength grade C25 of closed concrete 6, final top absolute altitude after steel sleeve 2 connections should be higher than more than the outside water surface 4 height 0.5m, and the indwelling spacing between steel sleeve 2 and the sheet body 1 is 40mm;
G) draw water, treat that closed concrete 6 intensity reach when necessarily requiring, to drawing water in the steel sleeve 2, the reply place of leaking that finds in the pump process to leak carries out timely leak stopping and handles;
H) grouting, by being positioned at the high pressure grouting machine of (or ship) on the operation platform, the slurry 5 for preparing is in advance poured in the steel sleeve 2 as underwater epoxy resin (or high fluidity mortar), slurry pressuring tube should stretch into the steel sleeve bottom, carry out continuously and stably from bottom to top, must not interrupt;
I) reclaim steel sleeve, after stabilization works is finished, by detect the intensity of slurries in the steel sleeve 2 with condition maintenance test specimen, treat that its intensity reaches requirement after, by the diver first segment above steel sleeve 2 in bottom is from up to down reclaimed successively, present structure shown in Figure 3.
Claims (10)
1. a FRP sheet material comprises sheet body (1), it is characterized in that cloth hole (11) constitutes latticed between described sheet body (1) goes up.
2. FRP sheet material according to claim 1, the material that it is characterized in that described sheet body (1) is a carbon fiber, glass fiber, any one in aramid fiber or the basalt fibre.
3. FRP sheet material according to claim 1 is characterized in that described hole (11) is any one in rectangular opening or the circular port.
4. FRP sheet material according to claim 3 is characterized in that described hole (11) is rectangular opening.
5. FRP sheet material according to claim 1 and 2, the physical dimension that it is characterized in that described sheet body (1) is 50 * 50mm or 100 * 100mm.
6. method of reinforcing underwater foundation with the described FRP sheet material of claim 1 is characterized in that this method may further comprise the steps:
A) preparation of construction, according to construction drawing, determine to select for use corresponding specification between the sheet body (1) of cloth porose (11);
B) handle in earlier stage being reinforced thing, the attachment of the concrete surface of cylinder in the water is removed and the silt displacement at suspension column place;
C) make anchor hole, in water, be drilled with anchor hole on the concrete of cylinder;
D) sheet body (1) is installed, the latticed sheet body (1) of cloth porose (11) is fixed on the anchor hole with securing member between inciting somebody to action;
E) steel sleeve is installed, steel sleeve is nested with outside sheet body (1), the indwelling spacing between control steel sleeve and the sheet body (1), and make steel sleeve top lean out the water surface;
F) cast is with the exterior bottom of concrete pouring to the first segment steel sleeve;
G) draw water, water in the steel sleeve is taken out to the greatest extent;
H) grouting pours into underwater epoxy resin or the high mortar that flows between steel sleeve and the sheet body (1);
I) reclaim steel sleeve, through the slurry intensity in the steel sleeve is detected and reach qualified after, steel sleeve is reclaimed.
7. FRP sheet material according to claim 6 is characterized in that step C) described in the degree of depth of anchor hole be 30 times of diameter of sheet body (1) the vertical muscle of grid of going up formed grid.
8. FRP sheet material according to claim 6 is characterized in that step D) described in securing member be anchor bolt.
9. FRP sheet material according to claim 6 is characterized in that step e) described in the indwelling spacing be 30-200mm, the described water surface that leans out is the distance 〉=0.5m that leans out the water surface.
10. FRP sheet material according to claim 6 is characterized in that step F) described in concrete be 〉=0.5m at the thickness of the exterior bottom of first segment steel sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102128390A CN102051862A (en) | 2009-10-30 | 2009-10-30 | FRP sheet and method of reinforcing bridge pier therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102128390A CN102051862A (en) | 2009-10-30 | 2009-10-30 | FRP sheet and method of reinforcing bridge pier therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102051862A true CN102051862A (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102128390A Pending CN102051862A (en) | 2009-10-30 | 2009-10-30 | FRP sheet and method of reinforcing bridge pier therewith |
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| Country | Link |
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| CN (1) | CN102051862A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948610A (en) * | 2017-05-03 | 2017-07-14 | 福州大学 | FRP networks and construction method for reinforcing wall |
| CN108797396A (en) * | 2018-08-28 | 2018-11-13 | 南京林业大学 | A kind of underwater pillarwork of reinforced mesh reinforcement bridge and construction method |
| CN110016893A (en) * | 2019-03-11 | 2019-07-16 | 武汉大学 | Antiknock concrete shield construction method under high-performance water based on perfusion technique |
-
2009
- 2009-10-30 CN CN2009102128390A patent/CN102051862A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948610A (en) * | 2017-05-03 | 2017-07-14 | 福州大学 | FRP networks and construction method for reinforcing wall |
| CN108797396A (en) * | 2018-08-28 | 2018-11-13 | 南京林业大学 | A kind of underwater pillarwork of reinforced mesh reinforcement bridge and construction method |
| CN108797396B (en) * | 2018-08-28 | 2023-11-14 | 南京林业大学 | Reinforcing mesh reinforced bridge underwater pier column structure and construction method |
| CN110016893A (en) * | 2019-03-11 | 2019-07-16 | 武汉大学 | Antiknock concrete shield construction method under high-performance water based on perfusion technique |
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Application publication date: 20110511 |