CN102926552A - Method for reinforcing row-lock wall through steel strands and polymer mortar - Google Patents
Method for reinforcing row-lock wall through steel strands and polymer mortar Download PDFInfo
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- CN102926552A CN102926552A CN2012104800859A CN201210480085A CN102926552A CN 102926552 A CN102926552 A CN 102926552A CN 2012104800859 A CN2012104800859 A CN 2012104800859A CN 201210480085 A CN201210480085 A CN 201210480085A CN 102926552 A CN102926552 A CN 102926552A
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Abstract
The invention relates to the field of construction engineering, and discloses a method for reinforcing a row-lock wall through steel strands and polymer mortar. The method includes the following steps: embedding oblique keys in bricks on flat as per the actual masonry method of the row-lock wall; fixing a steel strand net on the wall surface through the embedded oblique keys; and constructing a polymer mortar protective layer on the surface of the wall body. The method greatly improves the bearing capacity and resistance to vibration of the row-lock wall, and the testing result shows that the horizontal limit bearing capacity of the reinforced row-lock wall body is improved by more than 80% than that of an unreinforced wall body; and meanwhile, the intensity is greatly improved, the construction period is short, the construction technology is simple, templates do not need to be erected, and the method is particularly suitable for solving the problems of poor intensity and weak resistance to vibration of the masonry structure of the row-lock wall, as well as the problem of improving the cracking and ageing of the existing row-lock wall structure at the same time.
Description
Technical field
The present invention relates to building engineering field, is a kind of structure reinforcement and repair method of utilizing the steel strand polymer mortar to reinforce cavity wall.
Background technology
The cavity wall house is the major structural types of China middle and lower reach of Yangtze River and villages and small towns, East China building, has a large capacity and a wide range.The common way of most area cavity wall is employing standard loam brick, and comparatively common with one dormancy of three buckets or five buckets, one dormancy block method.Find by inquiry, it is poor that cavity wall house stress performance and anti-seismic performance are built the house more in fact, and because most of cavity wall house is all built voluntarily by the villages and small towns peasant, the problems such as the ubiquity floor height is higher, the standard width of a room in an old-style house is large, construction measure imperfection are through existing aging, cracking in various degree after certain service life.For guaranteeing structural safety, promote the shock resistance of cavity wall masonry structure, need the cavity wall structure is reinforced.Because the special form of building by laying bricks or stones of cavity wall, the stress performance of bucket brick position is bad, and existing all kinds of masonry structure reinforcement means all is for the real body of building a wall, and it connects anchor measure and the position is not suitable for the cavity wall masonry structure.
Summary of the invention
The present invention aims to provide the method for utilizing steel strand and polymer mortar to reinforce cavity wall.
This steel strand polymer mortar is reinforced the method for cavity wall; its technical scheme is according to the actual masonry way of cavity wall, to select dormancy brick position to implant pin; form steel wire mesh by implanting the fixing vertical and horizontal steel strand of pin, adopt the polymer mortar formation topping of plastering.By the collaborative work of steel strand polymer mortar surface layer and cavity wall, improve supporting capacity and the shock resistance of existing cavity wall masonry.
The method that the steel strand polymer mortar is reinforced cavity wall may further comprise the steps:
(1) the cavity wall structure comprises bucket brick, header and dormancy brick, according to the actual masonry way of cavity wall, on the metope of both sides, longitudinally with the horizontal direction hole of punching in dormancy brick position, the degree of depth 40mm of hole～50mm;
Be implanted into pin at each hole; And the pin up and down crisscross isosceles triangle that is is arranged; Pin can adopt nylon crab-bolt or gluing screw rod, its diameter 6～7mm, length 55mm～65mm;
(2) along pin horizontal steel strand and vertical steel strand are installed successively on metope, and vertically steel strand are fixed at infall with pin with horizontal steel strand, to form steel wire mesh;
It is the steel strand of 3.5～5mm that horizontal steel strand and vertical steel strand are selected diameter;
Be specially: lay first horizontal steel strand, the vertical steel strand of rear laying, and guarantee that vertical steel strand and metope space are not less than 10mm(and are generally 10～20mm); Tension steel strand also makes it be in tensioned state, and its degree of tightness requirement is drawn with vertical steel wire mesh and pinched flexible getting final product; After steel wire mesh was tightened, utilization was implanted pin and will vertically be fixed at infall with horizontal steel strand;
Implant pin and be interspersed at metope, be isosceles triangle and distribute: in the horizontal direction, two adjacent distances of implanting pin are 600～700mm; In vertical direction, two adjacent distances of implanting pin are 800～900mm; Implanting other vertical distances of implanting pins that pin and adjacent transverse reinforce on the iron wire is 360～480mm, with the horizontal ranges of other implantation pins on the adjacent vertical reinforcing iron wire be 300～350mm;
(3) form the polymer mortar topping with the polymer mortar applying material at metope;
Be specially: first with clear water flushing cavity wall face and keep wet, carry out again the construction of polymer mortar topping; The compressive strength of polymer mortar material is not less than 40MPa(and is preferably 40～50MPa), and on the one-sided metope, polymer mortar topping gross thickness is 30mm～40mm; Divide two-layer the construction, every layer thickness 15mm～20mm.Covering curing at least three days waters after topping construction is finished.
Steel strand polymer mortar of the present invention is reinforced the method for cavity wall, has following technique effect: the horizontal anti-seismic supporting capacity that can significantly improve cavity wall, guarantee the follow-up instructions for use of structure, improve anti-seismic performance, can improve the problems such as existing cavity wall structure crack is aging simultaneously; The polymer mortar gain in strength is fast, short construction period, does not affect original usage space; Construction technology simply, does not need to set up template.
Description of drawings
Fig. 1 is the elevation that the steel strand polymer mortar is reinforced cavity wall.
Fig. 2 is that the steel strand polymer mortar is reinforced cavity wall at the sectional view of A-A direction.
Fig. 3 is that the steel strand polymer mortar is reinforced cavity wall at the sectional view of B-B direction.
The vertical steel strand of 1-among the figure, the horizontal steel strand of 2-, 3,3a, 3b, 3c, 3d-implant pin, 4-polymer mortar topping, the 5-brick that struggles against, 6-header, 7-dormancy brick.
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, the invention provides the method that a kind of steel strand polymer mortar is reinforced cavity wall, the cavity wall structure comprises bucket brick 5, header 6 and dormancy brick 7; From the cavity wall structural plane that is reinforced, be provided with successively from inside to outside: vertical steel strand 1 of laying in polymer mortar topping 4, the topping and horizontal steel strand 2, and be used for connecting in length and breadth to steel strand and the implantation pin 3 that is reinforced cavity wall.By reference to the accompanying drawings the specific embodiment of the present invention is described as follows:
(1) according to the actual masonry way of cavity wall, select dormancy brick 7 positions, on the metope of both sides, mark respectively the hole location of implanting pin 3, and the crisscross isosceles triangle that is is arranged up and down; Adopt 6mm drill bit electric drill to beat to punch in the position of dormancy brick hole, the dark 40mm～50mm of hole;
Placing one at each hole takes root in into pin 3; It is nylon crab-bolt or the gluing screw rod of 6～7mm that the pin of implanting adopts diameter, and its length is 55mm～65mm.
(2) lay horizontal steel strand 2 at metope first, then lay vertical steel strand 1, to form steel wire mesh; And guarantee that vertical steel strand 2 are not less than 10mm(with the metope space and are generally 10～20mm); Laterally steel strand and vertical steel strand employing diameter are the steel strand (being preferably 4mm) of 3.5～5mm;
Before laying horizontal steel strand and vertical steel strand, tension steel strand also makes it be in tensioned state; The horizontal steel strand 2 of pretensioning, the vertical steel strand 1 of post tensioning, its degree of tightness requirement is drawn with vertical steel strand 1 and is pinched flexible getting final product; After vertically steel strand are tightened, with implanting pin 3 vertical steel strand 1 and horizontal steel strand 2 are fixed at infall;
Implant pin and be interspersed at metope, be isosceles triangle and distribute: concrete, as shown in Figure 1, implant pin 3a, 3b and 3c and be the isosceles triangle distribution; On the horizontal direction, two adjacent distances of implanting between pin 3b and the 3c are 600～700mm; In vertical direction, two adjacent distances of implanting between pin 3a and the 3d are 800～900mm; Other vertical distances of implanting pin 3a or 3d of implanting on pin 3b or 3c and the adjacent transverse reinforcing iron wire are 360～480mm, and other horizontal ranges of implanting pin 3b or 3c of implanting on pin 3a or 3d and the adjacent vertical reinforcing iron wire are 300～350mm.
(3) first with clear water flushing cavity wall face and keep wet, then carry out the construction of polymer mortar topping, form polymer mortar topping 4 with the polymer mortar applying material at metope.Divide two-layer construction, every layer thickness 15mm～20mm.On the one-sided metope, polymer mortar topping 4 gross thickness 30mm～40mm.The compressive strength of selected polymer mortar material is not less than 40MPa(and usually selects 40～50Mpa).
Covering curing at least three days waters after polymer mortar topping 4 construction is finished.
According to the above specific embodiment, designed the test specimen of cavity wall before and after reinforcing and carried out Low-cycle Test research.Result of the test shows, adopts the steel strand polymer mortar to reinforce the unguyed body of wall increase of horizontal limeit bearing capacity ratio of rear cavity wall more than 80%.
Claims (10)
1. a steel strand polymer mortar is reinforced the method for cavity wall, and described cavity wall structure comprises bucket brick, header and dormancy brick, it is characterized in that, may further comprise the steps:
(1) on the metope of both sides longitudinally with horizontal direction punching hole, and in hole, install and implant pin;
(2) along pin horizontal steel strand and vertical steel strand are installed successively on metope, and vertically steel strand are fixed at infall with implanting pin with horizontal steel strand;
(3) form the polymer mortar topping with the polymer mortar applying material at metope.
2. the method for the described steel strand polymer mortar reinforcing of claim 1 cavity wall is characterized in that, in the step (1), the position in described punching hole is the dormancy brick.
3. the method for the described steel strand polymer mortar reinforcing of claim 1 cavity wall is characterized in that, described implantation pin is interspersed at metope: in the horizontal direction, two adjacent distances of implanting pins are 600～700mm; In vertical direction, two adjacent distances of implanting pin are 800～900mmmm; Implanting other vertical distances of implanting pins that pin and adjacent transverse reinforce on the iron wire is 360～480mm, with the horizontal ranges of other implantation pins on the adjacent vertical reinforcing iron wire be 300～350mm.
4. the method for the described steel strand polymer mortar reinforcing of claim 1 cavity wall is characterized in that, step is laid first horizontal steel strand in (2), the vertical steel strand of rear laying; Vertically steel strand and metope space are 10mm～20mm.
5. the method for the described steel strand polymer mortar reinforcing of claim 1 cavity wall is characterized in that, the described hole degree of depth of step (1) is 40mm～50mm.
6. the method for the described steel strand polymer mortar reinforcing of claim 1 cavity wall is characterized in that, the described pin of step (1) is nylon crab-bolt or gluing screw rod, and its diameter is 6～7mm, and length is 55mm～65mm.
7. the method for the described steel strand polymer mortar reinforcing of claim 1 cavity wall is characterized in that, the described horizontal steel strand of step (2) are 3.5～5mm with the diameter of vertical steel strand.
8. the described steel strand polymer mortar of claim 1 is reinforced the method for cavity wall, it is characterized in that, in the step (2), carry out stretch-draw and make it be in tensioned state when horizontal steel strand and vertical steel strand are installed, its degree of tightness requirement is pinched flexible for vertical steel strand draw.
9. the described steel strand polymer mortar of claim 1 is reinforced the method for cavity wall, it is characterized in that, in the step (3), with the polymer mortar applying material before metope, first with the floating ash of clear water flushing cavity wall face and keep wet.
10. the method for the described steel strand polymer mortar reinforcing of claim 1 cavity wall is characterized in that, the compressive strength of the described polymer mortar of step (4) is not less than 40MPa, and on the one-sided metope, polymer mortar topping gross thickness is not less than 30mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104800859A CN102926552A (en) | 2012-11-22 | 2012-11-22 | Method for reinforcing row-lock wall through steel strands and polymer mortar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104800859A CN102926552A (en) | 2012-11-22 | 2012-11-22 | Method for reinforcing row-lock wall through steel strands and polymer mortar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321448A (en) * | 2013-07-15 | 2013-09-25 | 南通华新建工集团有限公司 | Construction process for reinforcing wall of building |
| CN105908988A (en) * | 2016-04-20 | 2016-08-31 | 上海市建筑科学研究院 | Method for reinforcing masonry wall through bamboo tendon, cement and mortar surface layer |
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| DE20104518U1 (en) * | 2001-02-20 | 2001-06-28 | Motiee Tehrani Mehran | Pliers system for existing houses against earthquakes |
| CN201011136Y (en) * | 2007-03-16 | 2008-01-23 | 中国建筑科学研究院 | Steel stranded wire and polymer mortar combined strengthening structure |
| CN201981668U (en) * | 2011-03-18 | 2011-09-21 | 北京工业大学 | Aerated concrete block masonry wall reinforced by embedded reinforcing bars |
| US20110277397A1 (en) * | 2010-05-11 | 2011-11-17 | Mitek Holdings, Inc. | Restoration Anchoring System |
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2012
- 2012-11-22 CN CN2012104800859A patent/CN102926552A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20104518U1 (en) * | 2001-02-20 | 2001-06-28 | Motiee Tehrani Mehran | Pliers system for existing houses against earthquakes |
| CN201011136Y (en) * | 2007-03-16 | 2008-01-23 | 中国建筑科学研究院 | Steel stranded wire and polymer mortar combined strengthening structure |
| US20110277397A1 (en) * | 2010-05-11 | 2011-11-17 | Mitek Holdings, Inc. | Restoration Anchoring System |
| CN201981668U (en) * | 2011-03-18 | 2011-09-21 | 北京工业大学 | Aerated concrete block masonry wall reinforced by embedded reinforcing bars |
Non-Patent Citations (2)
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| 廖娟，陈龙珠，田世民: "空斗墙采用钢板网片加固试验及应用", 《建筑技术》 * |
| 王卓琳，蒋利学: "高强钢绞线-聚合物砂浆加固低强度空斗墙的试验研究", 《工业建筑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321448A (en) * | 2013-07-15 | 2013-09-25 | 南通华新建工集团有限公司 | Construction process for reinforcing wall of building |
| CN105908988A (en) * | 2016-04-20 | 2016-08-31 | 上海市建筑科学研究院 | Method for reinforcing masonry wall through bamboo tendon, cement and mortar surface layer |
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Address after: 200032 Shanghai city Xuhui District Wanping Road No. 75 Applicant after: Shanghai Research Institute of Building Sciences (Group) Co., Ltd. Applicant after: Science and Technology Development Company of SRIBS Address before: 200032 Shanghai city Xuhui District Wanping Road No. 75 Applicant before: Shanghai Research Institute of Building Sciences (Group) Co., Ltd. Applicant before: Sci-Tech Development Corp., Shanghai City Inst. of Building Science |
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Application publication date: 20130213 |