TWI745975B - Construction method of building floor improvement engineering - Google Patents

Abstract

A construction method for building floor slab improvement engineering, which is aimed at improving the building floor reinforced concrete protection layer peeling off and steel bar corrosion; mainly includes: the first step: the removal procedure, the original floor slab is removed; the second step: steel planting The procedure is to fix the new steel bar material; the third step: the shotcrete procedure, the concrete is sprayed on the floor slab and the steel is covered with the shotcrete machine in stages; the fourth step: the strengthening procedure: after the shotcrete procedure is completed, The supporting layer co-constructed by H-steel and angle iron strengthens the strength of the floor; according to the construction method of improving the floor slab, it can effectively improve the structure of reinforced safety for buildings with floor slab reinforced concrete protection layer peeling off and steel corroded.

Description

Building floor improvement engineering method

The present invention is a construction method for building floor slab improvement engineering, especially a construction method for strengthening safety of buildings with floor slab reinforced concrete protective layer peeling off and steel bar rusting.

In view of the fact that in buildings with a relatively long age, the walls or floor slabs are often exposed and corroded, or the floor slabs of the buildings are cracked due to earthquakes. Among them, in the 1970s, when public works and construction were prosperous, there was no The standard for the detection of chloride ion content in sand and gravel. When the sand and gravel industry uses gravel near the sea mouth, because the high chloride ion content in the sand and gravel exceeds the standard, the untreated sea sand and the concrete will cause corrosion of the steel bars covered in the concrete. The protective layer is peeling off (commonly known as the sea sand house); coupled with poor concrete quality, improper construction and corrosion of the steel bars, the volume expansion of the steel bars after corrosion causes the concrete to crack, peel off and even the steel bars to rust and break. In severe cases, it will damage the structure of the house. It shortens the life span of the house and affects the safety of residents’ living.

At present, sea sand houses can be prevented and treated, and there are currently two anti-corrosion methods, one is the cathodic anti-corrosion method, and the other is the electrochemical desalination method, which can reduce the corrosion rate of steel bars to extend the life of the house structure. Therefore, the current treatment method of the relevant industry is to knock out the loosened soil and stone, remove the rust of the steel bar and apply it as a rust conversion agent, so that the rust conversion agent forms a protective film on the surface of the steel bar, and isolates the steel bar from the outside air and water. , And then use epoxy resin and lightweight mortar to repair the structure, and then apply carbon fiber reinforcement.

At present, the cost of prevention and treatment is not only high; The structure needs to be reinforced. Considering the housing service life, structural safety and economic benefits, it is almost only possible to rebuild, and those who cannot afford to rebuild can only take the risk of living.

The conventional knowledge of building floor improvement engineering technology is as explained above, because the repair cost is high, and the floor slab is repaired with light sand instead of heavy material due to safety considerations, because the effect is not good. .

In view of this, the inventor of the present invention painstakingly studied how to reduce repair costs, rapid construction and structural strengthening of the building floor improvement engineering method, which is the main subject of the present invention.

A construction method for building floor slab improvement, which mainly includes the first step: the removal procedure, which is to remove the peeled floor, clean the surface of the steel bar, and coat the surface of the steel bar with anti-corrosion paint; the second step is: the steel planting process, mainly on the side wall below the floor Drill a plurality of sidewall holes at appropriate places, and insert the appropriate length of reinforcement reinforcement into the sidewall holes, and then drill multiple bonding holes in the appropriate places of the floor to inject the reinforcement agent and provide the appropriate length of L-shaped reinforcement: 1. For the steel mesh of the same size as the floor area, the periphery of the steel mesh can be spot welded to the steel bars in the side wall holes, and the L-shaped steel bars inserted into the floor slab can collude and tie the middle area of the steel mesh to complete the planting. Steel procedure; the third step: the spraying procedure, which is to mix cement, sand, beneficial mortar, shrinkage cement, strengthening agent and seven centimetres with appropriate water to form concrete, and use a shotcrete to spray the concrete to the floor slab. On the first bottom layer, the bottom layer is solidified to 20%-40% of water remaining, and the concrete is sprayed to the floor slab again with a shotcrete machine to form a middle layer. The floor slab is sprayed to form an outer surface layer, and the outer surface layer is solidified to 70-90% of the water remaining, and then the concrete is smeared and leveled on the outer surface layer with a tool. In addition, the outer surface layer is embedded with steel mesh at least two centimeters. To prevent the concrete from being too dry to cause cracks, spray water on the outer surface every 36-48 hours to maintain the surface. Grouting procedure; Fourth step: Strengthening procedure, drill multiple fixing holes at appropriate positions on the peripheral side wall below the outer surface layer, and then implant expansion screws, lock the H steel to the outer wall expansion screws, and fix the angle iron to the H steel to form a total The supporting layer is coated with anti-rust paint to complete the present inventor.

In the present invention, the concrete-based cement is 5%-15%, shrinkage cement 2%-8%, sand 50%-65%, beneficial cement 2%-8%, strengthening agent 1%-5% and seven citrate 15%-20 %, mixed with appropriate amount of water, and coated on the floor in stages, and reinforced mesh steel bars are used to increase the tensile force and strength of the concrete, which can play a role in strengthening the safety of the floor repair and maintenance.

10: The first step: Clear the program

11: Remove peeling floor slab

12: Clean the steel surface

13: Apply anti-rust paint

20: The second step: steel planting procedure

21: side wall hole

22: Inject bar planting agent

23: Consolidation of steel bars

24: Combination hole

25: Reinforcing agent

26: L-shaped steel bar

27: Steel mesh

28: Spot welding connection

30: The third step: shotcrete program

31: Concrete

311: Cement

312: shrink cement

313: sand

314: Benefit Clay

315: Enhancer

316: Seven Stones

317: Water

32: bottom layer

33: Middle

34: Outer surface layer

35: Smoothing tool

36: Sprinkle

40: The fourth step: strengthening the program

41: fixed hole

42: expansion screw

43: H steel

44: Angle iron

45: support layer

46: Anti-rust paint

51: side wall

511: fixed hole

512: expansion screw

52: L-shaped fixed seat

521: perforation

53: Sealing plate

531: Through Hole

532: Screw

54: H steel

55: support frame

56: Angle iron

[Figure 1] is the step of the method according to the present invention.

[Figure 2] is the process flow of the method according to the present invention.

[Figure 3] is a concrete composition table according to the present invention.

[Figure 4] is a schematic diagram of the steel mesh structure according to the present invention.

[Figure 5] is a schematic diagram of the construction method according to the present invention.

[Figure 6] is a schematic diagram of the construction of this method according to the present invention.

[Fig. 7] is a diagram of the second embodiment of the enhancement program according to the present invention.

[Figure 8] is a cross-sectional view of the second embodiment of the strengthening program according to the present invention.

[Figure 9] is a plan view of the second embodiment of the strengthening procedure according to the present invention.

Generally, according to a construction method of building floor improvement engineering according to the present invention, please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 for the best construction method. Steel program 20, the third step shotcrete program 30, and the fourth step strengthening program 40; in,

The first step: removal procedure 10, which is to remove the peeling floor slab 11, remove the corrosion on the surface of the clean steel bar with a steel brush, and apply anti-rust paint 13 to the surface of the steel bar to prevent moisture and prevent re-corrosion;

The second step is: steel planting process 20, which mainly drills a plurality of side wall holes 21 at appropriate places on the side walls under the floor, and inserts the appropriate length of consolidation steel bars 23 after injecting reinforcement agent 22 into the side wall holes 21, and then places them at the appropriate places on the floor slab. Drill a plurality of bonding holes 24 to inject the reinforcement agent 25 and provide an appropriate length of L-shaped steel bars 26: a steel mesh 27 of the same size as the floor area, and the circumference of the steel mesh 27 can be exactly 23 points with the reinforcing steel bars of the side wall holes 21 Welding and fixing, and the L-shaped steel bars 26 inserted in the floor slab can collude with the middle area of the steel mesh 27 and tie the spot welding connection 28, so that the periphery of the steel mesh 27 can be connected and fixed with the consolidation steel 23 of the side wall hole 21. The middle block of the steel mesh 27 can be suspended and fixed by the L steel bars 26 inserted into the floor slab to complete the steel planting procedure 20;

The third step: Shotcrete procedure 30, which uses a shotcrete machine to spray concrete 31 on the floor. Among them, the concrete 31 is about 5%-15% of cement 311, and shrinkage cement 312 accounts for about 2%-8%. Sand 313 accounts for about 50%-65%, beneficial mortar 314 accounts for about 2%-8%, strengthener 315 accounts for about 1%-5%, and seven centipite 316 accounts for about 15%-20%, and mix with appropriate water 317 When the concrete 31 is connected to the shotcrete machine, the shotcrete machine will spray the concrete 31 on the floor to form a bottom layer 32 of appropriate thickness. When the bottom layer 32 is solidified to 20%-40% of the water remaining, it will be used again The shotcrete machine sprays the concrete 31 on the floor slab to form a middle layer 33 of appropriate thickness. When the middle layer 33 is solidified to 20%-40% of the water remaining, the shotcrete machine sprays the concrete 31 on the floor slab to form a suitable thickness. The outer surface layer 34, the outer surface layer 34 is solidified to 70-90% of the water remaining, use the smoothing tool 35 to smear the concrete 31 on the outer surface layer 34 again and level it, after the spraying process 30 just The steel mesh 27 can be covered at least two centimeters or more; and in order to prevent the concrete 31 from being too dry and causing cracks, spray water 36 on the outer surface 34 at intervals of 36-48 hours to complete the spraying process 30;

Fourth step: Strengthening procedure 40. In order to make the floor improvement project safer and stronger, drill multiple fixing holes 41 at appropriate positions on the peripheral side wall below the outer surface layer 34, and then implant expansion screws 42 to lock the H steel 43 on the outer side wall for expansion The screws 42 and the angle iron 44 are fixed to the H steel 43 to form a supporting layer 45, and the supporting layer 45 is coated with an anti-rust paint 46 (not shown in the figure) to complete the present inventor.

During the implementation of the present invention, the third step: the shotcrete program 30, the amount, number of layers, and thickness of the shotcrete for the concrete 31 can be adjusted in the construction environment; in addition, the shrinkage cement 312 and seven centimetres 316 in the composition of the concrete 31 can be added according to actual needs. Or not.

In addition, for the second embodiment of the present invention, please refer to Figures 7, 8, and 9, where the fourth step strengthening process 40 can be performed in the third step: the lower side wall 51 after the spraying process 30, which is matched with a plurality of perforations. For the L-shaped fixing seat 52 of 521, drill the corresponding fixing hole 511 at the opposite position of the side wall 51, and insert the expansion screw 512 into the fixing hole 511. At the same time, the two ends of the H steel 54 are welded to the sealing plate 53 with the through hole 531. The screw 532 is inserted into the through hole 531 and the perforation 521 and then locked into the expansion screw 512, and a plurality of H steel 54 is erected in the third step: a support frame 55 is formed under the shotcrete process 30. In addition, each H steel 54 pitches can weld multiple angle irons 56 to make the support frame 55 stronger and strengthen the support effect.

The removal procedure of the present invention cleans the spalled floor slab 11 containing high chloride ions and the surface of corroded steel bars 12, and the steel wire mesh 27 and shotcrete 31 are laid to form a new floor structure, thereby replacing the old cracked and peeling floor slab, and is a strengthening structure in The support layer 41 is erected under the new floor slab to achieve a safe and compressive structure, and the entire construction method can complete the building improvement project in only four steps, and can greatly improve the safety.

However, the above is only a description of possible embodiments of the present invention, and should not be limited to them Determine the scope of implementation of the present invention; that is, all equal changes and modifications made in accordance with the scope of the patent application of the present invention should still fall within the scope of the patent of the present invention.

It can be seen from the above that the present invention has indeed achieved a breakthrough structure, and has an improved content of the invention. At the same time, it can achieve industrial applicability and progress. Moreover, the present invention has not been seen in any publications, and it is also novel. In accordance with the provisions of the Patent Law, Yan filed an application for an invention patent in accordance with the law, and I implore the Jun Bureau review committee to grant a legal patent.

10: The first step: Clear the program

20: The second step: steel planting procedure

30: The third step: shotcrete program

40: The fourth step: strengthening the program

Claims (7)

A construction method for building floor slab improvement, including: the first step: the removal procedure, which is to remove the peeled floor slab, brush off the surface of the clean steel bar, and apply anti-rust paint on the surface of the steel bar; the second step is: the steel planting process, mainly under the floor slab Drill a plurality of sidewall holes at appropriate places on the sidewalls, and insert the appropriate length of reinforcement reinforcement into the sidewall holes, and then drill multiple bonding holes at the appropriate places on the floor to inject the reinforcement agent and provide the appropriate length of L-shaped rebar ; A steel mesh with the same size as the floor area, the periphery of the steel mesh can be spot-welded to the fixing steel bars of the side wall holes, and the L-shaped steel bars inserted into the floor can collude and tie the middle area of the steel mesh. ; The third step: the shotcrete procedure, which uses the shotcrete machine to spray the concrete to the floor slab. When the concrete is connected to the shotcrete machine, the shotcrete machine sprays the concrete to the floor slab to form a bottom layer of appropriate thickness. When it solidifies to 20%-40% of the water remaining, the shotcrete machine sprays the concrete to the floor slab to form an outer surface layer of appropriate thickness. The outer surface layer is solidified to 70%-90% of the water remaining, and the concrete is again applied with a smoothing tool. Apply on the outer surface layer and level it; in addition, spray water for curing on the outer surface layer at intervals of 36-48 hours; the fourth step: strengthening procedure, drill a plurality of fixing holes at appropriate positions on the peripheral side wall below the outer surface layer, and then implant expansion screws, and insert H steel The expansion screw is fastened to the outer wall, and the angle iron is fixed to the H steel to form a supporting layer, and the supporting layer is coated with anti-rust paint to complete the completion. For example, the construction floor improvement engineering method of claim 1, which further includes spraying the concrete to the floor slab with a shotcrete machine to form a bottom layer of appropriate thickness, and then spraying the concrete to the floor slab with a shotcrete machine to form a middle layer of appropriate thickness When the middle layer is solidified to 20%-40% of the water remaining, the shotcrete machine then sprays the concrete to the floor slab to form an outer surface layer of appropriate thickness. For example, the construction floor improvement engineering method of claim 1, which further includes a shotcrete procedure that can cover at least two centimeters or more of the steel wire mesh. For example, the construction floor improvement engineering method of claim 1, in which the concrete is about 5%-15% of cement, about 50%-65% of sand, about 2%-8% of beneficial cement, and about 1% of strengthening agent- 5%, and add appropriate water to mix and stir to become concrete. For example, the construction floor improvement engineering method of claim 4, in which the concrete can be added with shrinkage cement accounting for about 2%-8%, and seven centimetres 15%-20%. Such as the construction method of building floor improvement engineering in claim 1, in which the fourth step: strengthening The procedure can be in the third step: the lower side wall after the spraying procedure is matched with an L-shaped fixing seat with multiple perforations. The corresponding fixing holes are drilled in the opposite position of the side wall, and the expansion screws are inserted into the fixing holes. The two ends of the H-steel are welded with a sealing plate with through-holes, and the through-holes are pierced by screws, and then locked into the expansion screws. According to this, a plurality of H-steels are erected in the third step: a support frame is formed under the spraying procedure By. For example, the construction floor improvement engineering method of claim 6, which can further weld a plurality of angle irons at each H steel interval to make the support frame stronger and strengthen the support effect.

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