1 Project Name: 。。。。。。。。
2 Project Reinforcement Description:
This project includes reinforcement planting, column cladding pressure injection, steel support beams, concrete wall demolition. According to the design requirements of the site drawings and the current "Technical Specification for Reinforcement of Concrete Structures" and "Post-anchoring Technical Regulations", the following specific construction program is drawn up:
Two, reinforcement implantation construction program
Process: drilling → clearing → steel treatment → glue distribution → steel implantation → maintenance.
1Construction must be above -10 ℃ environment construction, construction and use of temperature environment is lower than -10 ℃, should be used to warm up processing measures.
2 Other pre-construction safety precautions:
2.1 Before construction, we must check whether the equipment is running normally, and whether the wires are broken or leaking.
2.2 work at height to set up scaffolding and fasten the safety belt.
3 positioning
3.1 according to the design requirements of planting drill holes marked location, type, if there is a force reinforcement on the substrate, the drilling position can be adjusted appropriately, but should be planted on the inside of the hoop tendons (beams, columns) or part of the distribution of tendons on the inside (on the plate, shear wall).
3.2 The main tools used in this process: tape measure, ink bucket, pencil.
4, drilling
4.1 drilling should be used to impact the hammer into the hole, such as the case of non-cutting rebar should be adjusted to avoid the location of the hole, for the solid LITTLE high-efficiency reinforcing adhesive, the diameter of the hole d + 4 ~ 8mm, anchorage length of 15d, can ensure that the planted steel to yield.
4.2 Drill hole wall is wet, there is water on the anchorage force has no effect.
4.3 The main tools used in this process: electric hammer, water drill or pickaxe.
Schedule:
Rebar diameter
(mm) Drill diameter
(mm) Anchorage length
(mm) Pull-out force after 24h
(KN)
10 14 150 26.50
12 16 180 38.50
14 18 210 52.20
16 20 240 61.80
18 22 270 86.30
20 25 300 106.20
22 28 330 127.80
25 30 375 166.40
5 Clearing of holes
5.1 Drill hole Finished, the hole dust with compressed air to blow out the hole dust, and then use the brush to brush the hole wall clean then check the hole depth, hole diameter, qualified after the hole will be temporarily closed.
5.2 The main tools used in this process: hole cleaning fan, brush, tape measure.
6 Descaling of steel reinforcement
6.1 The rust within the anchoring length of steel reinforcement should be removed.
6.2 The main tools used in this process: angle grinder, steel wire wheel blade.
7 planting
7.1 will be soaked in rebar reinforcement adhesive into the hole, can also be used with fine steel bar to send glue into the hole. Anchorage adhesive filling has been inserted into the rebar after a small amount of agent overflow is appropriate, the rebar can be rotated or hand-hammering way into the hole. The planting anchoring adhesive does not flow, horizontal holes, inverted pendant holes can also be convenient and fast planting.
7.2 The main tools used in this process: gloves, hand hammer.
8 curing, maintenance
GuLiTe reinforcement planting at room temperature, low temperature can be good curing, if the curing temperature of about 20 ℃, 24 hours can be loaded to use; if the curing temperature of about 0 ℃, 48 hours can be loaded to use; planting reinforcement 4 hours shall not disturb the rebar, if there is a large disturbance is appropriate to replant the reinforcement.
9 test
9.1 Goodyear Specialty Reinforcement Adhesive Mechanical properties are excellent, normal operation can reach the design value of reinforcing steel and anchor end without damage. Inspection is generally used jack, anchorage, reaction frame system to do the pull-out test.
9.2 the main tools used in the process: jack, anchorage, counterforce frame, pressure gauge.
9.3 inspection standards: the national recognition of engineering testing center test data for the quality of engineering construction based.
Three, wrapped steel reinforcement (pressure injection)
Construction process: surface treatment → installation → pre-embedded hose → sealing → glue → pressurization → curing test → anticorrosion treatment
1 construction preparation should be careful to read the design drawings before construction, must be cleaned up the structural surface, according to the design drawings, the location of adhesive steel in the concrete measured and placed grinding control line, to be sanded after completion of the supplementary adhesive steel position line. After the completion of the sticky steel position line.
2 concrete surface grinding grinding off concrete floater, until completely exposed solid new structural surface, concrete surface peeling, hollow drum, honeycomb, corrosion and other deterioration of the phenomenon of the parts should be removed, with the specified material repair, cracks should be the first part of the closure process.
3 steel surface grinding steel bonding surface, shall be de-rusted and rough treatment. Use the wheel grinder to knock off the corrosion layer. The greater the roughness of the sanding, the better, and subsequently wiped clean.
4 assembly welding according to the drawings or negotiation requirements combined with the actual situation on the site of the steel assembly welding, angle steel and the original structure of the column as close as possible, vertical basic straight, such as the original structure of the column appeared to be a large deviation, it should be straightened processing, hoop plate and angle steel lap parts need to be welded, weld should be in line with the requirements of the design and the "building steel structure welding procedures".
5 buried pipe injection
5.1 After the weld is qualified, use epoxy mortar to seal along the edge of the steel, combined with the actual situation on the site to determine the location of the buried pipe and spacing. If the pipe is not buried, φ6 injection holes can be drilled on the angle and hoop plate, and the spacing between the holes is not more than 500mm.
5.2 Strictly according to the proportion of structural adhesive instruction manual provided by the preparation, and mixing can be used only after homogeneous. The amount of glue should not be too much at a time, to 40 ~ 50 minutes to use up is appropriate.
5.3 with an air pump and glue injection tank for glue injection, glue injection in the vertical order from the bottom upwards, the horizontal direction in the same direction of the order, the injection of glue until the next injection tube (hole) overflow glue until, in turn, until all the injection tubes (holes) are injected. The last injection tube (hole) is used for the air hole, can not be injected, after the end of the injection to clean up the residual structural adhesive.
6 completion and acceptance of the structural adhesive curing with a small hammer gently tapping the surface of the steel, from the sound to determine the bonding effect, such as individual hollow sound, indicating that the local is not dense, and must be again high-pressure injection method to make up for the solid.
Four, wall demolition and steel beam support
1 wall demolition before the upper part of the retained wall should be unloading support processing, and then higher than the corresponding position of the escalator opening along the wall to cut out a height of 500mm, the width of the wall and the width of the empty mouth (placing the support of steel beams).
2 Determine the pivot point at both ends of the steel beam, use the planting process to fix the bull's leg embedded parts and steel beam welding, the standard should be in line with the "Technical Specification for the Construction of Steel Structural Engineering", the steel beam placement is completed, the gap between the top of the beam and the wall with epoxy mortar to be filled. The surface of steel beam is painted with anti-rust paint.
3 Determine the position of the light body to be removed, do a good job of safety protection, and use the water drill to cut or pickaxe to remove, so as not to damage other original structure.
Five, safety and technical measures
1 construction personnel must be trained by the safety education before entering the construction site, must comply with the "safety regulations", comply with the company on the "site of civilized construction management regulations" of the relevant content;
2 before the commencement of the technical staff must be carried out before the technical briefing, so that the construction personnel to understand the content of the construction, the program and safety precautions, and clearly define the job responsibilities of each type of work, and in the work of the construction staff to understand the content of the construction, the program and safety precautions. Each type of job responsibilities, and in the construction of strict implementation; full-time safety officer for safety supervision;
3 construction area to pull the fence, and construction-related personnel are not allowed to enter the construction site; into the site must be correctly wearing protective equipment;
4 construction environment to maintain clean and sanitary, to reduce environmental pollution and occupational hazards;
5 on the participation of this project Construction personnel to carry out education and training on safe and civilized construction, to put an end to barbaric construction.