CN105672690B - Load bearing wall reinforcing method - Google Patents

Load bearing wall reinforcing method Download PDF

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Publication number
CN105672690B
CN105672690B CN201610181708.0A CN201610181708A CN105672690B CN 105672690 B CN105672690 B CN 105672690B CN 201610181708 A CN201610181708 A CN 201610181708A CN 105672690 B CN105672690 B CN 105672690B
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Prior art keywords
arched girder
brick
presstressed reinforcing
reinforcing steel
load bearing
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CN201610181708.0A
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CN105672690A (en
Inventor
叶香竹
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Jiangxi High Energy Construction Engineering Co., Ltd.
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叶香竹
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218Increasing or restoring the load-bearing capacity of building construction elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218Increasing or restoring the load-bearing capacity of building construction elements
    • E04G23/0222Replacing or adding wall ties
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218Increasing or restoring the load-bearing capacity of building construction elements
    • E04G23/0244Increasing or restoring the load-bearing capacity of building construction elements of beams at places of holes, e.g. drilled in them
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0274Temporary shoring of wall opening

Abstract

The invention discloses a kind of load bearing wall reinforcing method, it is characterized in that arched girder is set in load bearing wall hole top, arched girder both ends set arched girder buttress, arched girder bottom sets arched girder presstressed reinforcing steel, arched girder presstressed reinforcing steel passes through arched girder buttress one through to constructional column, constructional column is fixed on by anchorage after arched girder presstressed reinforcing steel prestressed stretch-draw, arched girder top sets arched girder non-prestressing tendon, and arched girder non-prestressing tendon stretches into arched girder buttress;Arched girder buttress position brick wall both sides set strengthening steel slab, and strengthening steel slab is fixed by split bolt;Load bearing wall presstressed reinforcing steel is set above arched girder, and brick wall presstressed reinforcing steel forms broken line after prestressed stretch-draw;Brick wall presstressed reinforcing steel is divided into several tensioned units, and tensioned unit both ends are welded brace rod, fixed after brick wall tension of prestressed tendon with lacing wire.

Description

Load bearing wall reinforcing method
Technical field
The present invention relates to a kind of load bearing wall reinforcing method, suitable for building field.
Background technology
Load bearing wall punch can cause it is unbalance in stress, on the one hand because the load above hole needs to carry, if Unreasonable structure weight can then cause brick wall to cave in, and gently then occur crack around hole.Conventionally employed Horizontal concrete lintel shape Formula usually occurs hole edge in engineering practice and splayed crack or Vertical Cracks occurs.On the other hand can be divided again due to stress There is the region of high stress in brick wall of the cloth above load-bearing wall opening, if the brick wall above no technical measures load-bearing wall opening can go out Existing irregular cracks.In addition, partial pressing occurs in the brick wall of load-bearing wall opening edge, if not causing the attention of height can make Into security incident.
The content of the invention
The present invention is to provide a kind of load bearing wall reinforcing method, solves that traditional reinforcement means security performance is bad to ask Topic.
Due to arch girder construction in stress it is more reasonable, the load above arched girder can rationally be transmitted, thus this Invention sets arched girder in load bearing wall hole top, and arch depth of beam is 350~600mm, arch beam width and brick wall width phase Together, arched girder both ends set arched girder buttress, and arched girder buttress is highly 350~600mm, and arched girder bottom sets arched girder pre- Stress rib, a diameter of 18~25mm of arched girder presstressed reinforcing steel, arched girder presstressed reinforcing steel pass through arched girder buttress one through to construction Post, constructional column is fixed on by anchorage after arched girder presstressed reinforcing steel prestressed stretch-draw, arched girder top set arched girder it is non-it is pre- should Power muscle, a diameter of 18~25mm of arched girder non-prestressing tendon, arched girder non-prestressing tendon stretch into arched girder buttress.Arched girder buttress Position brick wall both sides set strengthening steel slab, and strengthening steel slab thickness is 12~15mm, and strengthening steel slab is to local below arched girder buttress Brick wall is reinforced, and strengthening steel slab reinforcing scope extends to 0.5~0.7m below hole, and strengthening steel slab is carried out by split bolt Fixed, a diameter of 16~18mm of split bolt, it is 350~450mm that split bolt, which sets spacing,.The setting of strengthening steel slab is effectively kept away The partial pressing for having exempted from arched girder buttress position destroys.
Because the brick wall formation stress concentration above arched girder is easily cracking, it is necessary to which the brick wall above arched girder enters Row is reinforced.According to simulation analysis of computer, arc area of stress concentration can be formed above arched girder, according to stress distribution feature, arch Load bearing wall presstressed reinforcing steel, a diameter of 12~16mm of load bearing wall presstressed reinforcing steel, when brick wall presstressed reinforcing steel is just arranged are set above ellbeam For level, vertical spacing of the brick wall presstressed reinforcing steel in level is 200~250mm, position of the brick wall presstressed reinforcing steel in level Brick wall mortar joint position is arranged on as much as possible, and brick wall presstressed reinforcing steel forms broken line after prestressed stretch-draw.According to stress characteristic cloth Put six row's brick wall presstressed reinforcing steels or four row's brick wall presstressed reinforcing steels, first row brick wall presstressed reinforcing steel and second row brick wall presstressed reinforcing steel Flush, the 3rd row's brick wall presstressed reinforcing steel and the 4th row's brick wall presstressed reinforcing steel are retracted relative to second row brick wall presstressed reinforcing steel, retraction Length is 40~60mm, and the 5th row's brick wall presstressed reinforcing steel and the 6th row's brick wall presstressed reinforcing steel are relative to the 4th row's brick wall presstressed reinforcing steel Retraction, retraction length is 40~60mm;It is 50~70mm with a distance from first row brick wall presstressed reinforcing steel is vertical from arched girder.Brick wall is pre- Stress rib both ends setting porthole, porthole width, length, highly identical with load bearing wall width, the interior placement billet of porthole, brick wall are pre- Stress rib is welded with billet, and intensity is clogged in porthole as C30 or the concrete of the above.Brick wall presstressed reinforcing steel divides For several tensioned units, each tensioned unit length is 1.5~2m, and brace rod, brick wall prestressing force are welded in tensioned unit both ends Fixed after muscle tensioning with lacing wire.
Construction procedure includes:
(1) form bracing is set, load bearing wall load is laid down.
(2) load-bearing wall opening is opened up with cutting machine, load bearing wall sets groove arched girder presstressed reinforcing steel is passed to through groove Constructional column, colligation arch beam steel install arch beam forms and arched girder buttress template, and arch side template sets concrete to pour Hole, a diameter of 80~120mm of concrete pouring hole are built, it is 2~3m that concrete pouring hole, which sets spacing,.
(3) porthole at brick wall presstressed reinforcing steel both ends is opened up with cutting machine, billet is placed in porthole, by brick wall presstressed reinforcing steel It is welded on billet, casting concrete after brick wall presstressed reinforcing steel is fixed.
(4) brace rod is welded on by brick wall presstressed reinforcing steel according to tensioned unit.
(5) arched girder concrete and arched girder buttress use pumped commercial concrete, and slump is 8~10mm, pump business Product concrete is entered and poured by concrete pouring hole.
(6) tensioning of arched girder presstressed reinforcing steel is carried out, tensioning process is using as follows:By arched girder presstressed reinforcing steel initial tensioning 10% control tension stress is pulled to, lotus 3min is held and establishes primary stress, then is stretched to control tension stress, holds lotus 5min foundation Prestressing force.Arched girder presstressed reinforcing steel is fixed on constructional column by anchorage after tensioning.
(7) brick wall prestressing force is carried out after the porthole concrete at brick wall presstressed reinforcing steel both ends reaches design strength more than 90% Muscle tensioning, brick wall tension of prestressed tendon use vertical tension, are welded and fixed after vertical tension with lacing wire.
Mechanical property of the present invention is good, and safe operation is reliable.
Brief description of the drawings
Fig. 1 is load bearing wall reinforcing structural representation.
Reference:1st, arched girder, 2, arched girder presstressed reinforcing steel, 3, arched girder non-prestressing tendon, 4, arched girder buttress, 5, Anchorage, 6, strengthening steel slab, 7, split bolt, 8, constructional column, 9, brick wall presstressed reinforcing steel, 10, billet, 11 concrete, 12, support Muscle, 13, lacing wire.
Embodiment
The present embodiment is described in detail below in conjunction with accompanying drawing.
The present embodiment sets arched girder 1 in load bearing wall hole top, and the height of arched girder 1 be 400mm, the width of arched girder 1 and Brick wall width is identical, and the both ends of arched girder 1 set arched girder buttress 4, and the height of arched girder buttress 4 is 400mm, and the bottom of arched girder 1 is set Arched girder presstressed reinforcing steel 2,2 a diameter of 22mm of arched girder presstressed reinforcing steel are put, arched girder presstressed reinforcing steel 2 passes through arched girder buttress 4 one Through to constructional column 8, constructional column 8 is fixed on by anchorage 5 after the prestressed stretch-draw of arched girder presstressed reinforcing steel 2, the top of arched girder 1 is set Arched girder non-prestressing tendon 3,3 a diameter of 22mm of arched girder non-prestressing tendon are put, arched girder non-prestressing tendon 3 stretches into arched girder branch Pier 4.The position brick wall both sides of arched girder buttress 4 set strengthening steel slab 6, and the thickness of strengthening steel slab 6 is 14mm, and strengthening steel slab 6 is to arch Beam buttress 4 below reinforced by local brick wall, and the reinforcing scope of strengthening steel slab 6 extends to 0.6m below hole, and strengthening steel slab 6 passes through Split bolt 7 is fixed, 7 a diameter of 16mm of split bolt, and it is 400mm that split bolt 7, which sets spacing,.
The top of arched girder 1 sets load bearing wall presstressed reinforcing steel, a diameter of 12~16mm of load bearing wall presstressed reinforcing steel, brick wall prestressing force It is level when muscle 9 is just arranged, vertical spacing of the brick wall presstressed reinforcing steel 9 in level is 240mm, and brick wall presstressed reinforcing steel 9 is in level When position be arranged on brick wall mortar joint position as much as possible, brick wall presstressed reinforcing steel 9 forms broken line after prestressed stretch-draw.According to should Power feature arranges six row's brick wall presstressed reinforcing steels 9, and first row brick wall presstressed reinforcing steel 9 and second row brick wall presstressed reinforcing steel 9 flush, the 3rd Row's brick wall presstressed reinforcing steel 9 and the 4th row's brick wall presstressed reinforcing steel 9 are retracted relative to second row brick wall presstressed reinforcing steel 9, and retraction length is 50mm, the 5th row's brick wall presstressed reinforcing steel 9 and the 6th row's brick wall presstressed reinforcing steel 9 are retracted relative to the 4th row's brick wall presstressed reinforcing steel 9, contracting It is 50mm to enter length;It is 60mm with a distance from first row brick wall presstressed reinforcing steel 9 is vertical from arched girder 1.The both ends of brick wall presstressed reinforcing steel 9 are set Porthole, porthole width, length, highly identical with load bearing wall width, placement billet 10, brick wall presstressed reinforcing steel 9 and steel in porthole Backing plate 10 is welded, and intensity is clogged in porthole as C30 or the concrete 11 of the above.If brick wall presstressed reinforcing steel 9 is divided into Dry tensioned unit, each tensioned unit length are 1.8m, and brace rod 12 is welded at tensioned unit both ends, and brick wall presstressed reinforcing steel 9 is opened Fixed after drawing with lacing wire 13.
Construction procedure includes:
(1) form bracing is set, load bearing wall load is laid down.
(2) load-bearing wall opening is opened up with cutting machine, load bearing wall sets groove arched girder presstressed reinforcing steel 2 is passed to through groove Constructional column 8, the reinforcing bar of colligation arched girder 1 install the template of arched girder 1 and the template of arched girder buttress 4, and the side template of arched girder 1 sets mixed Native pouring hole, a diameter of 100mm of concrete pouring hole are coagulated, it is 2.5m that concrete pouring hole, which sets spacing,.
(3) porthole at the both ends of brick wall presstressed reinforcing steel 9 is opened up with cutting machine, billet 10 is placed in porthole, brick wall in advance should Power muscle 9 is welded on billet 10, casting concrete 11 after brick wall presstressed reinforcing steel 9 is fixed.
(4) brace rod 12 is welded on by brick wall presstressed reinforcing steel 9 according to tensioned unit.
(5) concrete of arched girder 1 and arched girder buttress 4 use pumped commercial concrete, and slump is 8~10mm, pumping Commerical ready-mixed concrete is entered and poured by concrete pouring hole.
(6) tensioning of arched girder presstressed reinforcing steel 2 is carried out, tensioning process is using as follows:By the initial tensioning of arched girder presstressed reinforcing steel 2 10% control tension stress is stretched to, lotus 3min is held and establishes primary stress, then is stretched to control tension stress, lotus 5min is held and builds Vertical prestressing force.Arched girder presstressed reinforcing steel 2 is fixed on constructional column 8 by anchorage 5 after tensioning.
(7) it is pre- that brick wall is carried out after the porthole concrete 11 at the both ends of brick wall presstressed reinforcing steel 9 reaches design strength more than 90% The tensioning of stress rib 9, the tensioning of brick wall presstressed reinforcing steel 9 use vertical tension, are welded and fixed after vertical tension with lacing wire 13.

Claims (7)

1. a kind of load bearing wall reinforcing method, it is characterized in that setting arched girder in load bearing wall hole top, arched girder both ends are set Arched girder buttress is put, arched girder bottom sets arched girder presstressed reinforcing steel, and arched girder presstressed reinforcing steel is led directly to through arched girder buttress one To constructional column, constructional column is fixed on by anchorage after arched girder presstressed reinforcing steel prestressed stretch-draw, arched girder top sets arched girder Non-prestressing tendon, arched girder non-prestressing tendon stretch into arched girder buttress;Arched girder buttress position brick wall both sides set strengthening steel slab, Strengthening steel slab is reinforced to local brick wall below arched girder buttress, and strengthening steel slab reinforcing scope extends to 0.5 below hole~ 0.7m, strengthening steel slab are fixed by split bolt;
Brick wall presstressed reinforcing steel, brick wall presstressed reinforcing steel a diameter of 12~16mm are set above arched girder, and brick wall presstressed reinforcing steel is just arranged When for level, vertical spacing of the brick wall presstressed reinforcing steel in level be 200~250mm, position of the brick wall presstressed reinforcing steel in level Put and be arranged on brick wall mortar joint position as much as possible, brick wall presstressed reinforcing steel forms broken line after prestressed stretch-draw;Brick wall presstressed reinforcing steel Both ends set porthole, porthole width, length, highly identical with load bearing wall width, placement billet, brick wall presstressed reinforcing steel in porthole Welded with billet, intensity is clogged in porthole as C30 or the concrete of the above;Brick wall presstressed reinforcing steel is divided into some Individual tensioned unit, each tensioned unit length are 1.5~2m, and brace rod, brick wall tension of prestressed tendon are welded in tensioned unit both ends After fixed with lacing wire.
2. load bearing wall reinforcing method according to claim 1, it is characterized in that arch depth of beam is 350~600mm, arch Ellbeam width is identical with brick wall width.
3. load bearing wall reinforcing method according to claim 1, it is characterized in that arched girder buttress highly for 350~ 600mm。
4. load bearing wall reinforcing method according to claim 1, it is characterized in that arched girder presstressed reinforcing steel a diameter of 18~ 25mm。
5. load bearing wall reinforcing method according to claim 1, it is characterized in that arched girder non-prestressing tendon a diameter of 18 ~25mm.
6. load bearing wall reinforcing method according to claim 1, it is characterized in that strengthening steel slab thickness is 12~15mm.
7. load bearing wall reinforcing method according to claim 1, it is characterized in that, a diameter of 16~18mm of split bolt, It is 350~450mm that split bolt, which sets spacing,.
CN201610181708.0A 2016-03-02 2016-03-02 Load bearing wall reinforcing method Active CN105672690B (en)

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Publication number Priority date Publication date Assignee Title
CN108867931B (en) * 2018-07-02 2019-12-13 中国建筑第八工程局有限公司 Shear wall building door opening structure
CN108999422A (en) * 2018-08-15 2018-12-14 庐江荣睿建设工程有限公司 A kind of method that bearing wall opens up door-window opening
CN109653533A (en) * 2019-02-13 2019-04-19 程勇俊 A kind of concrete floor reinforced construction method

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CN102877656A (en) * 2012-08-10 2013-01-16 南京工业大学 Method for reinforcing masonry wall through steel structure
CN103741842A (en) * 2014-01-22 2014-04-23 天津大学建筑设计研究院 Lightweight fabricated shear wall structure
CN204212447U (en) * 2014-10-17 2015-03-18 中国十七冶集团有限公司 Door and window concrete arch lintel strengthening construction device

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Publication number Priority date Publication date Assignee Title
KR100693137B1 (en) * 2004-06-15 2007-03-13 김상남 Structure for reinforcing a building using prestress
CN102434008A (en) * 2010-09-29 2012-05-02 贵阳铝镁设计研究院有限公司 Opening reinforcing method implemented after punching hole on cast-in-place concrete plate
CN102877656A (en) * 2012-08-10 2013-01-16 南京工业大学 Method for reinforcing masonry wall through steel structure
CN103741842A (en) * 2014-01-22 2014-04-23 天津大学建筑设计研究院 Lightweight fabricated shear wall structure
CN204212447U (en) * 2014-10-17 2015-03-18 中国十七冶集团有限公司 Door and window concrete arch lintel strengthening construction device

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CN107299773B (en) 2019-08-30
CN105672690A (en) 2016-06-15

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