Brick wall reinforced construction method
Technical field
The present invention relates to a kind of reinforced construction method, in particular to a kind of brick wall reinforced construction method.
Background technique
Being reinforced when bearing capacity is inadequate occurs in brick wall, merely using steel reinforcing effect and bad, due to it is rear plus
Reinforced steel is difficult to form entirety with original brick wall in carrying, i.e., original brick wall first plays a role in carrying, then
It plays a role after the reinforced steel added, or even just to participate in carrying, such strenthening member meeting when original brick wall reaches capacity
In unsafe condition, it will appear brittle break under biggish bearing capacity, reinforced steel and the brick wall collaboration added after how making
Stress is engineers and technicians' project to be faced.
Summary of the invention
The present invention is to provide a kind of brick wall reinforced construction method, solves reinforced steel and brick wall is unable to asking for cooperative bearing
Topic.
Reinforcing bar cuff is arranged every 2.5~3m at mortar joint position in brick wall in the present invention, reinforcing bar ferrule diameters using 8~
10mm, different placing of reinforcement cuff dislocation arrangements, the reinforcing bar of reinforcing bar cuff pass through brick wall horizontal mortar joint and form closure cuff, brick wall table
Horizontal reinforcement is arranged in face, and the vertical spacing of horizontal reinforcement is 150~300mm, and horizontal reinforcement diameter uses 8~10mm, horizontal reinforcement
Segmentation prestressed stretch-draw is used after being fixed by horizontal reinforcement anchor rib, segmentation prestressed stretch-draw length cell is that same row is adjacent
The distance of reinforcing bar cuff, horizontal reinforcement become broken line reinforcing bar after tensioning, and the broken line reinforcing bar of adjacent row tensioning length maximum is adopted
It being welded and fixed with steel bar, steel bar is welded with the anchor rib being reserved in brick wall, and anchor rib diameter uses 8~10mm,
Anchor rib protrudes into brick wall preformed hole, and cement screedn of constructing after prestressed stretch-draw is as protective layer, to prevent reinforcement corrosion
With creep.Cement screedn thickness uses 25~30mm, whole in order to form cement screedn and the reinforcing bar on brick wall surface
Body, broken line reinforcing bar outside hang steel mesh, and bar diameter used by steel mesh is 6mm, spacing 200m.
Construction procedure includes:
(1) wall body slit is cleared up
Since wall is if there is crack, crack can be made to generate compressive deformation in prestressed stretch-draw, prestressing force is caused to damage
It loses, the purpose of off-load reinforcing is not achieved, therefore wall body slit must be reinforced.
Using the waterglass mixed serum cementation of fissures, waterglass mixed serum is produced as follows: first waterglass is diluted with dimethylbenzene,
Dimethylbenzene and waterglass weight ratio are 0.3, then the waterglass slurries by the waterglass slurries and cement mixing after dilution, after dilution
Weight ratio with cement is 0.5, forms waterglass mixed serum.
It operates Shi Xianyong wire brush the dust of each 100mm wide concrete surface in crack two sides, dross are removed completely, then used
Waterglass mixed serum dead-end fracture.The wider place in crack is secured the needle to every 700mm, and stays 2mm empty among two syringe needles
Between do not close and make gas vent, be socketed syringe needle one by one with high-pressure grouting pump, waterglass mixed serum be pressed into crack, until and needle
Until adjacent gas vent outflow waterglass mixed serum.Stop 30min after being in the milk for the first time and carries out secondary supplementary irrigation again.Through
2d conserves prestressing force of being allowed for access and applies Zhang Zuoye.
(2) anchor rib and reinforcing bar cuff are set
Brick wall is drilled with preformed hole, reserve that bore dia is 2~3mm bigger than anchor rib, and it is intraocular to blow off hole for air-supply after drilling
Dust, then anchor rib is put into preformed hole, epoxy resin mortar is clogged in gap between anchor rib and preformed hole.
Reinforcing bar cuff passes through brick wall horizontal mortar joint and is welded into closure cuff.
(3) horizontal reinforcement is installed
Horizontal reinforcement and reinforcing bar cuff weld.
(4) horizontal reinforcement prestressed stretch-draw
Prestressed stretch-draw uses lever type clamping tool, and the resistance arm of lever type clamping tool and the ratio of power arm are
0.1~0.015.
As can be related to during prestressed stretch-draw lever type clamping tool repeatedly press from both sides hold together caused by stress loss, reinforcing bar
The stress loss of tie rod and anchor rib welding, the stress loss of relaxation of steel, therefore horizontal reinforcement prestressing force uses ultra stretching, table 1
For the loss of prestress coefficient situation of different tensioning length, according to many experimental results, using proof stress ultra stretching 9%.
The loss of prestress coefficient of the different tensioning length of table 1
Tensioning length |
2.5m |
2.6m |
2.7m |
2.8m |
2.9m |
3m |
1 time |
0.091 |
0.089 |
0.089 |
0.090 |
0.091 |
0.088 |
2 times |
0.089 |
0.091 |
0.090 |
0.091 |
0.090 |
0.090 |
3 times |
0.088 |
0.090 |
0.092 |
0.090 |
0.089 |
0.089 |
4 times |
0.090 |
0.092 |
0.090 |
0.088 |
0.090 |
0.091 |
5 times |
0.092 |
0.090 |
0.091 |
0.090 |
0.088 |
0.090 |
6 times |
0.091 |
0.088 |
0.088 |
0.092 |
0.090 |
0.092 |
(5) cement screedn is constructed
That installs steel mesh hangs brushing cement mortar after rear steel mesh to drawing bar diameter to use 10mm to drawing reinforcing bar,
Cement screedn survives in three times, and each depth of plastering is 8~10mm.Wet curing must not be less than 7 days after the completion.
Reinforcing bar cuff of the present invention, steel bar, anchor rib can be processed using reinforcing bar waste material, so
Cost is relatively low.
The present invention becomes whole by deformed bar and brick wall, to the stress level for reducing brick wall and plays prestress steel
The bearing capacity of muscle plays a significantly greater role, so mechanical property is preferable.Constructing operation of the present invention is convenient, highly reliable.
Detailed description of the invention
Fig. 1 is brick wall reinforced construction method schematic diagram.
In each attached drawing: 1, reinforcing bar cuff, 2, broken line reinforcing bar, 3, steel bar, 4, anchor rib, 5, brick wall, 6, horizontal reinforcement.
Specific embodiment
Reinforcing bar cuff 1 is arranged every 2.5~3m at mortar joint position in brick wall 5 in embodiment, 1 diameter of reinforcing bar cuff using 8~
10mm, the different dislocation of placing of reinforcement cuff 1 arrangements, the reinforcing bar of reinforcing bar cuff 1 pass through 5 horizontal mortar joint of brick wall and form closure cuff, brick
Horizontal reinforcement 6 is arranged in 5 surface of wall, and the vertical spacing of horizontal reinforcement 6 is 150~300mm, and 6 diameter of horizontal reinforcement uses 8~10mm,
Horizontal reinforcement 6 uses segmentation prestressed stretch-draw after being fixed by anchor rib 4, segmentation prestressed stretch-draw length cell arranges phase to be same
The distance of adjacent reinforcing bar cuff 1, horizontal reinforcement 6 become broken line reinforcing bar 2, the broken line steel of adjacent row tensioning length maximum after tensioning
Muscle 2 is welded and fixed using steel bar 3, and steel bar 3 is welded with the anchor rib 4 being reserved in brick wall 5, and 4 diameter of anchor rib is adopted
With 8~10mm, anchor rib 4 protrudes into 5 preformed hole of brick wall, cement screedn of constructing after prestressed stretch-draw as protective layer,
To prevent reinforcement corrosion and creep.Cement screedn thickness uses 25~30mm, in order to make 5 surface of cement screedn and brick wall
Reinforcing bar form entirety, hang steel mesh on the outside of broken line reinforcing bar 2, bar diameter used by steel mesh is 6mm, and spacing is
200m。
Construction procedure includes:
(1) wall body slit is cleared up
Using the waterglass mixed serum cementation of fissures, waterglass mixed serum is produced as follows: first waterglass is diluted with dimethylbenzene,
Dimethylbenzene and waterglass weight ratio are 0.3, then the waterglass slurries by the waterglass slurries and cement mixing after dilution, after dilution
Weight ratio with cement is 0.5, forms waterglass mixed serum.
It operates Shi Xianyong wire brush the dust of each 100mm wide concrete surface in crack two sides, dross are removed completely, then used
Waterglass mixed serum dead-end fracture.The wider place in crack is secured the needle to every 700mm, and stays 2mm empty among two syringe needles
Between do not close and make gas vent, be socketed syringe needle one by one with high-pressure grouting pump, waterglass mixed serum be pressed into crack, until and needle
Until adjacent gas vent outflow waterglass mixed serum.Stop 30min after being in the milk for the first time and carries out secondary supplementary irrigation again.Through
2d conserves prestressing force of being allowed for access and applies Zhang Zuoye.
(2) anchor rib 4 and reinforcing bar cuff 1 are set
Brick wall 5 is drilled with preformed hole, and reserved bore dia is 2~3mm bigger than anchor rib 4, and it is intraocular to blow off hole for air-supply after drilling
Dust, then anchor rib 4 is put into preformed hole, epoxy resin mortar is clogged in gap between anchor rib 4 and preformed hole.
Reinforcing bar cuff 1 passes through 5 horizontal mortar joint of brick wall and is welded into closure cuff.
(3) horizontal reinforcement 6 is installed
Horizontal reinforcement 6 and reinforcing bar cuff 1 weld.
(4) 6 prestressed stretch-draw of horizontal reinforcement
Prestressed stretch-draw uses lever type clamping tool, and the resistance arm of lever type clamping tool and the ratio of power arm are
0.1~0.015.
6 prestressing force of horizontal reinforcement uses ultra stretching, using proof stress ultra stretching 9%.
(5) cement screedn is constructed
That installs steel mesh hangs brushing cement mortar after rear steel mesh to drawing bar diameter to use 10mm to drawing reinforcing bar,
Cement screedn survives in three times, and each depth of plastering is 8~10mm.Wet curing must not be less than 7 days after the completion.
Reinforcing bar cuff 1, steel bar 3 used by embodiment, anchor rib 4 are processed using reinforcing bar waste material.