Pouring system and method for reinforcing shear wall without operation space at top

Abstract

The invention discloses a pouring system and method for reinforcing a shear wall without an operation space at the top. The system comprises a formwork clamp, a discharging pipe and a flexible material distribution pipe which are sequentially connected. The template clamps are installed on the inner side face and the outer side face of the top of the template, and a discharging port of the discharging pipe is embedded in the template clamps. The high-position grouting system device under the scene that no operation space exists on the top is achieved, and the high-position grouting system device is particularly suitable for the grouting material or fine aggregate concrete filling construction process between a shear wall and the bottom of a structural plate in old building transformation.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and particularly relates to a perfusion system and method for reinforcing shear walls without operating space at the top. Background Art

[0002] In the project of enlarging the cross-section of shear walls for reinforcement, after planting steel bars and tying new steel bars, the space is enclosed by formwork and high-strength fine aggregate concrete or grouting material is poured. Since the operating space between the top of the shear wall and the bottom of the original structural floor slab is narrow (usually only 50 - 200 mm) after the formwork is set up, the traditional manual pouring operation is difficult, the construction process is imperfect, and the pouring height cannot reach the bottom of the slab, which easily leads to incomplete filling and voids at the top, affecting the reinforcement effect.

[0003] The patent CN222227935U for the reinforcement device at the horizontal joint of shear walls involves formwork clamps and anti-leakage slurry design, but is only applicable to horizontal joint pouring and does not solve the problem of high-position pouring in the vertical direction; the patent CN222716492U for the reinforcement device of the shear wall structure of high-rise residential buildings only focuses on the adjustment of the support structure and does not integrate the integrated design of the perfusion system and formwork. Summary of the Invention

[0004] In view of the above problems, the present invention discloses a perfusion system and method for reinforcing shear walls without operating space at the top, which solves the high-position perfusion system device in the scenario without operating space at the top, and is particularly applicable to the construction process of filling grouting material or fine aggregate concrete between the shear wall and the bottom of the structural slab during the renovation of old buildings.

[0005] A perfusion system for reinforcing shear walls without operating space at the top includes a formwork clamp, a discharge pipe, and a flexible cloth pipe connected in sequence; the formwork clamp is installed on the inner and outer sides of the top of the formwork, and the discharge port of the discharge pipe is embedded inside the formwork clamp.

[0006] Preferably, the formwork clamp includes a lining board installed between the formwork and the original shear wall and a reinforcement board installed on the outer side of the formwork, and the discharge port is connected to the lining board.

[0007] Preferably, a leak-proof slurry rubber pad is provided between the formwork clamp and the formwork.

[0008] Preferably, a U-shaped hoop is provided below the formwork, and the U-shaped hoop is connected to the original structural floor slab at the bottom.

[0009] Preferably, quick-setting cement slurry is provided between the bottom of the formwork and the original structural floor slab.

[0010] Preferably, an elastic rubber head is provided at the end of the flexible cloth pipe.

[0011] Preferably, the flexible cloth pipe is provided with a one-way check valve.

[0012] Preferably, a grouting pump is provided at one end of the flexible cloth tube away from the discharge pipe, and a spiral device for one-way conveying is arranged inside the grouting pump.

[0013] Preferably, the perfusion system further includes a pressure sensor and a liquid level monitor.

[0014] Preferably, the flexible cloth tube is made of pressure-resistant rubber, with an inner diameter of 50 - 80 mm and a bendable angle of ≥90°. The present invention also discloses a method for strengthening shear walls by using the above perfusion system for strengthening shear walls without operating space at the top, including the following steps: Step 1: Install the formwork between two floors. There is a first gap with a set distance between the side of the formwork and the existing shear wall, and a second gap with a set distance is reserved between the upper end of the formwork and the upper floor. Fix the lining board and the reinforcement board at the upper end of the formwork at the second gap to complete the second gap between the upper end of the formwork and the upper floor, forming a complete wall formwork assembly. Step 2: Fix the discharge pipe 5 in the holes pre - reserved in the lining board and the reinforcement board. The left end of the discharge pipe extends into the first gap, and the right end is located outside the reinforcement board. Step 3: Connect the discharge pipe 5 and the grouting pump with a flexible cloth tube 8. Step 4: Start the grouting pump and inject grouting material into the first gap through the flexible cloth tube. Step 5: After the slurry starts to set, loosen the clamp and remove the formwork to complete the strengthening.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1. By setting the flexible cloth tube and the check valve, the present application realizes "low - level pumping + high - level filling", without the need for operating space at the top, quickly adapts to different reinforcement thicknesses, and the installation efficiency is increased by 50%.

[0016] 2. The formwork clamp includes a lining board and a fixed steel plate, which makes up for the reserved holes in the formwork to form a complete wall formwork.

[0017] 3. The triple - seal system of welding an inner lining steel plate + anti - leakage rubber pad + bottom quick - setting cement slurry at the grouting port, with a leakage rate of ≤1%.

[0018] 4. Real - time pressure - liquid level monitoring, automatic control of the perfusion process, to avoid over - perfusion or under - perfusion. Description of the Drawings To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 is the overall structural schematic diagram of the present application; Figure 2 is the detailed side view of the template fixture; Figure 3 is the detailed front view of the template fixture; In the figure, 1, post-inserted bars and newly added steel bars, 2, template, 3, pre-pouring part, 4, template fixture, 4-1, inner lining plate, 4-2, reinforcement plate, 4-3, bolt and nut; 5, discharge pipe, 6, original structural floor slab, 7, docking head, 8, flexible cloth pipe, 9, spiral turntable, 10, cloth outlet, 11, rotating device, 12, battery pack, 13, switch. Specific embodiments

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0021] The present invention discloses a Figures 1-3 shown perfusion system for shear wall reinforcement integrating a high-position perfusion channel, an adjustable template fixture, and a leak-proof sealing structure. This system can achieve efficient and dense perfusion at the top of the shear wall without an operating space, improving the quality and efficiency of the reinforcement construction.

[0022] The system specifically includes the following parts: 1. High-position cloth device: The high-position cloth device includes a discharge port assembly and a pressure compensation structure: The discharge port assembly is arranged at the top of the template 2 and is connected as a whole with the inner lining plate 4-1 of the template fixture 4. The outer side is connected with the flexible cloth pipe 8 through the docking head 7. The inner diameter of the flexible cloth pipe 8 is 50 - 80 mm, and it can be bent to the discharge pipe 5 to be connected with the one-way check valve of the docking head 7, and is connected to an external grouting pump. The grouting pump is provided with a spiral device for one-way transportation. The spiral device includes a spiral turntable 9, a rotating device 11, a battery pack 12, and a switch 13 arranged in the grouting pump, and a cloth outlet 10 is arranged above the grouting pump.

[0023] Pressure compensation structure: The end of the flexible cloth pipe 8 is provided with an elastic rubber head, which can adapt to the width of the gap between the docking head 7 and the bottom of the plate, and is filled by extrusion with the grouting pressure.

[0024] 2. Adjustable formwork fixture system: The adjustable formwork fixture system includes a main fixture and an auxiliary fixture: The main fixture is assembled by the inner lining plate 4-1 below the discharge pipe 5 and the fixed plate 4-2 on the outside. The two shaped steel plates inside and outside the fixture are fixed by bolts and nuts 4-3 to clamp the newly erected formwork 2 of the wall.

[0025] The auxiliary fixture is an alternative: a U-shaped hoop can be set at the top and connected to the bottom of the structural slab to form a two-way fixation of bottom support and top tie, avoiding the formwork from floating during pouring.

[0026] 3. Multiple anti-leakage seal structures: The multiple anti-leakage seal structures include three parts: an anti-leakage rubber pad, a welded inner lining steel plate at the grouting port, and a bottom seal: The anti-leakage rubber pad is set at the joint of the formwork 2 and the formwork fixture 4 and tightened by bolts and nuts 4-3.

[0027] The flexible cloth pipe 8 is no longer connected to the formwork 2 separately. The end of the discharge pipe 5 is welded to the inner lining plate 4-1 inside the formwork 2 to form a unified whole to prevent slurry leakage at the discharge port during high-pressure pouring.

[0028] Bottom seal: Quick-setting cement slurry is applied to the contact surface between the bottom of the formwork and the original wall to form a sealed boundary.

[0029] 4. Intelligent monitoring module: Integrate a micro pressure sensor and a liquid level monitor to real-time feedback the pouring pressure and the rising height of the slurry, transmit it to the terminal through a wireless module, and automatically judge the timing of pouring completion.

[0030] The working process of this system is as follows: 1. Formwork positioning and fixation: Adjust the bolt length of the formwork fixture 4 according to the reinforcement thickness to make the formwork 2 and the formwork fixture 4 firmly connected. The inner lining plate 4-1 of the formwork fixture 4 fills the reserved holes of the formwork to form a complete wall formwork.

[0031] 2. Cloth pipe installation: Fit the docking head 7 of the flexible cloth pipe 8 and the discharge pipe 5 at the top of the formwork together and tighten the flange bolts to complete the sealing of the cloth port.

[0032] 3. Pressure pouring: Start the grouting pump and inject the grouting material into the top gap of the formwork through the flexible cloth pipe, with the pressure controlled at 0.5~1.5 MPa; When the monitoring module shows a sudden increase in pressure or the liquid level reaches the preset height, stop grouting and close the check valve.

[0033] 4. Demolition and Maintenance: Loosen the fixture after the slurry has initially set and remove the formwork. Cut and level the residual slurry at the position of the discharge pipe and the inner lining plate of the fixture to complete the reinforcement.

[0034] Key parameters of this device: Maximum perfusion height: ≤ 5 m (vertical distance); Applicable reinforcement thickness: 50 - 300 mm; Grouting pressure range: 0.3 - 2.0 MPa (adjustable); Single - time perfusion volume: Calculated according to the formwork volume, with a maximum support for a discharge rate of 2 m³ / h.

[0035] Although the embodiments of the present invention have been shown and described, the specific embodiments are only interpretations of the present invention and not limitations thereof. The specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions, and variations that do not contribute creatively to the embodiments according to their needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A perfusion system for strengthening shear walls without operating space at the top, characterized in that, It includes a template fixture, a discharge pipe, and a flexible cloth pipe connected in sequence; the template fixture is installed on the inner and outer sides of the top of the template, and the discharge port of the discharge pipe is embedded inside the template fixture.

2. The grouting system for strengthening shear walls without operating space at the top according to claim 1, characterized in that, The template fixture includes a lining board installed between the template and the original shear wall and a reinforcement board installed on the outer side of the template, and the discharge port is connected to the lining board.

3. A grouting system for strengthening shear walls without operating space at the top according to claim 1, characterized in that, A leak-proof rubber gasket is provided between the template fixture and the template.

4. A grouting system for strengthening shear walls without operating space at the top according to claim 1, characterized in that, A U-shaped hoop is provided below the template, and the U-shaped hoop is connected to the original structural floor at the bottom.

5. A grouting system for strengthening shear walls without operating space at the top according to claim 1, characterized in that, Quick-setting cement slurry is provided between the bottom of the template and the original structural floor.

6. The grouting system for strengthening shear walls without operating space at the top according to claim 1, characterized in that, An elastic rubber head is provided at the end of the flexible cloth pipe.

7. A grouting system for strengthening shear walls without operating space at the top according to claim 1, characterized in that, The flexible cloth pipe is provided with a one-way check valve.

8. A grouting system for strengthening shear walls without operating space at the top according to claim 1, characterized in that, A grouting pump is provided at one end of the flexible cloth pipe away from the discharge pipe, and a spiral device for one-way transportation is inside the grouting pump.

9. A grouting system for strengthening shear walls without operating space at the top according to claim 1, characterized in that, The perfusion system further includes a pressure sensor and a liquid level monitor.

10. A method for strengthening a shear wall using the grouting system for strengthening a shear wall without an operating space at the top according to claim 2, characterized in that, It includes the following steps: Step 1: Install the template between two floors. There is a first gap with a set distance between the side of the template and the existing shear wall, and a second gap with a set distance is reserved between the upper end of the template and the upper floor. Fix the lining board and the reinforcement board at the upper end of the template at the second gap, and fill in the second gap between the upper end of the template and the upper floor to form a complete wall template assembly. Step 2: Fix and install the discharge pipe in the holes reserved in advance in the lining board and the reinforcement board. The left end of the discharge pipe extends into the first gap, and the right end is located outside the reinforcement board. Step 3: Connect the discharge pipe and the grouting pump with a flexible cloth pipe. Step 4: Start the grouting pump and inject grouting material into the first gap through the flexible cloth pipe. Step 5: Loosen the fixture after the slurry starts to set, remove the template, and complete the reinforcement.

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