CN102704703A - Method for underpinning large-space wall by using pre-stressed carbon fiber composite cable - Google Patents
Method for underpinning large-space wall by using pre-stressed carbon fiber composite cable Download PDFInfo
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- CN102704703A CN102704703A CN2012101740589A CN201210174058A CN102704703A CN 102704703 A CN102704703 A CN 102704703A CN 2012101740589 A CN2012101740589 A CN 2012101740589A CN 201210174058 A CN201210174058 A CN 201210174058A CN 102704703 A CN102704703 A CN 102704703A
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Abstract
The invention discloses a method for underpinning a large-space wall by using a pre-stressed carbon fiber composite cable. The method comprises the following steps of: a, arranging a left reinforced concrete stand column and a right reinforced concrete stand column at the two ends of a to-be-formed underpinning beam on a brick masonry wall in vertical direction respectively and clearing mortar layers on the two sides of the brick masonry wall on the part where the underpinning beam is to be additionally arranged; b, grooving at positions where carbon fiber cables are required to be arranged on the two sides of the wall on which the underpinning beam is to be formed and arranging the carbon fiber cables in the grooves; c, additionally arranging steel wire net concrete layers on the two sides of the brick masonry wall on the part where the underpinning beam is to be formed; and d, anchoring the two ends of the carbon fiber cables on the additionally arranged left reinforced concrete stand column and right reinforced concrete stand column and tensioning to obtain pre-stress, forming a pre-stressed carbon fiber cable brick wall underpinning beam on the wall where the underpinning beam is to be formed, and finally performing mortar plastering treatment on the surface of the underpinning beam of the newly formed pre-stressed carbon fiber cable brick wall.
Description
Technical field
The present invention relates to a kind of cables prestressing stretching technique and implementation method; Be mainly used in existing brick-concrete composite buildings when carrying out the Large Space at Lower Part transformation;, the partial weight-bearing wall needs to form after being removed to underpin the bang path that beam changes upper load; Thereby guarantee the safety and normal usability of agent structure effectively, belong to technical field of structural engineering.
Background technology
Brick masonry housing is large in number and widely distributed in China, and is early stage owing to its extensive, cheap advantage of drawing materials has obtained extensive use.But such house belongs to the brick wall load-bearing, and its spatial is at a distance from underaction.Along with the propelling of socioeconomic growing and urbanization construction, transformation, variation has taken place in the function of use of some existing brick-concrete composite buildingses, and dwelling house for example at the front, office building need be transformed into the place of business (bigger StoreFront, supermarket etc.) of large space.In order to adapt to the requirement of new function, must carry out large space (majority the is a Large Space at Lower Part) transformation of local even whole floor to existing brick-concrete composite buildings, this just needs to remove local even most of bearing wall.The load bearing wall of existing brick-concrete composite buildings is removed and carries out spatial spread, must cause the bang path of original wall body bearing load to change.In order to satisfy the safety and normal usability that load-bearing brick wall is removed the back structure, effective underpinning structure must be set.
At present, comparative maturity and traditional brick wall are removed the combining structure that underpinning structure is employing reinforced concrete structure, shaped steel and concrete etc.In view of bearing bricks allowable ratio of height to sectional thickness of masonry wall or column thickness commonly used is generally 240mm, consider when adopting steel concrete to underpin beam that the operability of construction adopts both sides folder corbel to change more, the feasible beam that underpins is bigger to architectural space and appearance effects; Shaped steel mainly refers to steel plate or angle steel, and in use its durability and fireproof performance are relatively poor relatively.Therefore, be necessary to propose more advanced, the better underpinning structure form of performance.The present invention adopts embedded cables to carry out prestressed stretch-draw, and combines the two-layer steel-wire-net reinforced concrete layer of body of wall to address the above problem preferably.
Summary of the invention
The present invention is directed to combination that existing steel concrete underpins beam or shaped steel and concrete etc. and underpin the shortcoming of beam; A kind of underpinning technique that can satisfy the large space body of wall of the employing pre-stressed carbon fiber rope that underpins beam performance requirement and easy construction is provided; Overcome the weak point that underpins the beam technology commonly used at present, and provide concrete implementation method.It is employed in intend to remove and need sets up the position that underpins beam on the brick masonry wall and adopt embedded cables to carry out prestressed stretch-draw; In order to strengthen the integral rigidity that underpins beam, at the two-layer increase steel-wire-net reinforced concrete layer that underpins beam to strengthen its globality.This technology does not have influence basically to architectural appearance.
The technical scheme that the present invention adopts is:
A kind of method that adopts the pre-stressed carbon fiber rope to underpin the large space body of wall:
A. the formation of the plan on brick masonry wall underpins the beam two ends and along vertical left and right reinforced concrete upright column is set respectively, and plan is set up the brick masonry wall both sides screed that underpins the beam position remove,
B. lay the position fluting of cables in the plan that intend to form the body of wall both sides that underpin beam, and in groove, arrange cables, it arranges that shape and position and quantity confirm according to calculating,
C. form the brick masonry wall both sides that underpin the beam position in plan and set up the steel-wire-net reinforced concrete layer,
D. the two ends with cables are anchored on the left and right reinforced concrete post of newly establishing and stretch-draw acquisition prestressing force; Underpin beam body of wall formation pre-stressed carbon fiber rope brick wall in plan formation and underpin beam; At last, the pre-stressed carbon fiber rope brick wall of new formation being underpined the beam surface carries out the mortar powder brush layer and handles.
Compared with prior art, the present invention has following advantage:
1. it is loaded down with trivial details that existing steel concrete underpins the beam construction; Usage space and appearance effects to building are bigger; The present invention can be directly lays the high-strength carbon fiber rope on the needs setting underpins the body of wall of beam, form with the newly-increased reinforced mesh layer of concrete of wall outer side and underpin beam.
2. as adopting shaped steel, there is the relatively poor problem of corrosion of steel and refractoriness as underpining beam.Its intensity of the high-strength carbon fiber rope that uses among the present invention is high, light weight, good endurance.
3. overcome the weak point that underpins the beam technology commonly used at present, and provide concrete implementation method.It is employed in intend to remove and need sets up the position that underpins beam on the brick masonry wall and adopt cables to carry out external prestressing stretch-draw; In order to strengthen the integral rigidity that underpins beam, at the two-layer increase steel-wire-net reinforced concrete layer that underpins beam to strengthen its globality.The present invention does not have influence basically to architectural appearance.
Description of drawings
Fig. 1 is a pre-stressed carbon fiber rope prestressing force conversion large space body of wall technology sketch map, and wherein 1 is joist, and 2 is pre-stressed carbon fiber rope anchored end, and 3 are newly-increased reinforced concrete post, and 4 is the pre-stressed carbon fiber rope, and 5 is brick wall.
Fig. 2 is the A-A view among Fig. 1, and wherein 6 is reinforced mesh, and 7 is the reinforced mesh tension rib, and 8 is concrete, and 9 is surperficial mortar powder brush layer.
Fig. 3 is the realization flow figure of pre-stressed carbon fiber rope prestressing force conversion large space body of wall technology.
The specific embodiment
A kind of method that adopts the pre-stressed carbon fiber rope to underpin the large space body of wall:
A. the formation of the plan on brick masonry wall underpins the beam two ends and along vertical left and right reinforced concrete upright column is set respectively, and plan is set up the brick masonry wall both sides screed that underpins the beam position remove,
B. slot in the position of intending the plan laying cables that forms the body of wall both sides that underpin beam, and in groove, arrange cables,
C. form the brick masonry wall both sides that underpin the beam position in plan and set up the steel-wire-net reinforced concrete layer,
D. the two ends with cables are anchored on the left and right reinforced concrete post of newly establishing and stretch-draw acquisition prestressing force; Underpin beam body of wall formation pre-stressed carbon fiber rope brick wall in plan formation and underpin beam; At last, the pre-stressed carbon fiber rope brick wall of new formation being underpined the beam surface carries out the mortar powder brush layer and handles.
Steel wire diameter in the described gauze wire cloth must not be less than 1mm, and size of mesh opening must not be greater than 100mm, and tensile strength must not be less than 1200MPa, or adopts equicohesive high-performance fiber grid.
Described concrete strength grade must not be lower than C30, and the thickness of single face layer of concrete must not be less than 35mm.
Below in conjunction with the description of drawings specific embodiment:
A. plan is set up the brick masonry wall 5 both sides screeds that underpin beam 1 position and removes,
B. underpin the corresponding position fluting of laying cables 4 on the beam 1,
C. set up steel fabric sheet 6 in the brick masonry wall both sides that underpin the beam position,
F. horizontal steel tie 7 is passed the position of setting up joist, and with both sides reinforced mesh 6 drawknots,
G. with cables 4 anchorings 2 on the reinforced concrete post of newly establishing 3 and stretch-draw obtain prestressing force,
H. set up layer of concrete 8 formation pre-stressed carbon fiber rope brick walls in the both sides that underpined body of wall 5 and underpin beam 1,
I. the pre-stressed carbon fiber rope brick wall of new formation being underpined the beam surface carries out mortar powder brush layer 9 and handles.
Claims (3)
1. method that adopts the pre-stressed carbon fiber rope to underpin the large space body of wall is characterized in that:
A. the formation of the plan on brick masonry wall underpins the beam two ends and along vertical left and right reinforced concrete upright column is set respectively, and plan is set up the brick masonry wall both sides screed that underpins the beam position remove,
B. slot in the position of intending the plan laying cables that forms the body of wall both sides that underpin beam, and in groove, arrange cables,
C. form the brick masonry wall both sides that underpin the beam position in plan and set up the steel-wire-net reinforced concrete layer,
D. the two ends with cables are anchored on the left and right reinforced concrete post of newly establishing and stretch-draw acquisition prestressing force; Underpin beam body of wall formation pre-stressed carbon fiber rope brick wall in plan formation and underpin beam; At last, the pre-stressed carbon fiber rope brick wall of new formation being underpined the beam surface carries out the mortar powder brush layer and handles.
2. employing pre-stressed carbon fiber rope according to claim 1 underpins the method for large space body of wall; It is characterized in that the steel wire diameter in the gauze wire cloth is not less than 1mm; Size of mesh opening is not more than 100mm, and tensile strength must not be less than 1200MPa, or adopts equicohesive high-performance fiber grid.
3. employing pre-stressed carbon fiber rope according to claim 1 and 2 underpins the method for large space body of wall, it is characterized in that concrete strength grade must not be lower than C30, and the thickness of single face layer of concrete must not be less than 35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101740589A CN102704703A (en) | 2012-05-30 | 2012-05-30 | Method for underpinning large-space wall by using pre-stressed carbon fiber composite cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101740589A CN102704703A (en) | 2012-05-30 | 2012-05-30 | Method for underpinning large-space wall by using pre-stressed carbon fiber composite cable |
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| CN102704703A true CN102704703A (en) | 2012-10-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006225878A (en) * | 2005-02-15 | 2006-08-31 | Shimizu Corp | Reinforcement structure of masonry construction structure |
| CN1978843A (en) * | 2005-12-09 | 2007-06-13 | 湖南大学 | Construction method for reinforcing steel-bar net mortar thin layer |
| CN101672108A (en) * | 2009-09-27 | 2010-03-17 | 东南大学 | Steel plate-brickwork combination stressed building component and production method thereof |
| CN201753531U (en) * | 2010-07-16 | 2011-03-02 | 吴智深 | Concrete structure reinforced by prestress FRP ribs |
| CN202202577U (en) * | 2011-08-18 | 2012-04-25 | 正益集团有限责任公司 | Post disassembly structure of pre-stressed support beam |
-
2012
- 2012-05-30 CN CN2012101740589A patent/CN102704703A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006225878A (en) * | 2005-02-15 | 2006-08-31 | Shimizu Corp | Reinforcement structure of masonry construction structure |
| CN1978843A (en) * | 2005-12-09 | 2007-06-13 | 湖南大学 | Construction method for reinforcing steel-bar net mortar thin layer |
| CN101672108A (en) * | 2009-09-27 | 2010-03-17 | 东南大学 | Steel plate-brickwork combination stressed building component and production method thereof |
| CN201753531U (en) * | 2010-07-16 | 2011-03-02 | 吴智深 | Concrete structure reinforced by prestress FRP ribs |
| CN202202577U (en) * | 2011-08-18 | 2012-04-25 | 正益集团有限责任公司 | Post disassembly structure of pre-stressed support beam |
Non-Patent Citations (3)
| Title |
|---|
| 中华人民共和国住房和城乡建设部: "《GB 50702-2011 砌体结构加固设计规范》", 26 July 2011 * |
| 吴婷等: "砖砌体结构底层大空间改造方法的讨论及研究", 《建筑结构学报(增刊2)》 * |
| 邓志刚: "砌体结构钢筋网片加固设计方法研究", 《山西建筑》 * |
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Application publication date: 20121003 |