Prefabricated shear wall steel bar sleeve grouting fullness monitoring device

Abstract

A prefabricated shear wall steel bar sleeve grouting fullness monitoring device comprises a sleeve, a grouting hole is formed in the lower end of the sleeve, and a grout outlet is formed in the upper end of the sleeve; a fullness monitoring device is mounted at the pulp outlet; the fullness monitoring device comprises a connecting pipe, the connecting pipe is installed on the slurry outlet, the other end of the connecting pipe is connected with a gas collector, and the other end of the gas collector is connected with a pressure meter connector of a pressure meter. According to the grouting fullness monitoring device for the prefabricated shear wall steel bar sleeve, quality control is carried out on the grouting construction process according to the pressure intensity principle, grout leakage can be found in time, supplementary grouting can be conveniently carried out, and it is guaranteed that grouting of sleeve grouting connection is full.

Description

Technical Field

[0001] This utility model relates to the field of grouting monitoring of steel bar sleeves, and in particular to a device for monitoring the grouting fullness of steel bar sleeves in precast shear walls. Background Technology

[0002] The connection of precast shear walls in assembled concrete buildings is mainly achieved through steel sleeve grouting technology. Sleeve grouting is the last line of defense for the safety control of the main structure. If the grouting quality cannot be guaranteed, all previous quality control work will be in vain. The grouting inside the sleeve is not visible inside the precast component, making it a hidden project. The grout material has a high viscosity, and its fluidity is poor in the approximately 15mm diameter grout outlet. A full grout outlet does not necessarily mean that the inside of the sleeve is full. Common methods for detecting sleeve grouting fullness include: ultrasonic method, impact echo method, industrial CT method, damped vibration method, X-ray method, and pre-embedded steel wire pull-out method. However, these methods have not been widely used due to low accuracy, high cost, or inconvenience in operation. Furthermore, these methods mostly focus on the result detection after the grout has solidified; even if incomplete grouting is found, supplementary grouting is difficult. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a monitoring device for the grout fullness of precast shear wall steel reinforcement sleeves. It uses the pressure principle to control the quality of the grouting construction process, can detect grout leakage in time, facilitates replenishment, and ensures full grouting of the sleeve grouting connection.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A grouting fullness monitoring device for precast shear wall reinforcement sleeves includes a sleeve, with a grouting hole at the lower end and a grout outlet at the upper end; a fullness monitoring device is installed at the grout outlet.

[0006] The fullness monitoring device includes a connecting pipe, which is installed on the slurry outlet. The other end of the connecting pipe is connected to a gas collector, and the other end of the gas collector is connected to the pressure gauge connector of a pressure gauge.

[0007] The gas collector includes a first pipe, the lower end of which is connected to a connecting pipe and the upper end of which is connected to a second pipe and allows air to pass through; the upper end of the second pipe is connected to a pressure gauge and allows air to pass through; the upper end of the first pipe is sealed by an end plate, the end plate is provided with an air passage hole, a sliding block is provided inside the first pipe, the sliding block is in clearance fit with the inner wall of the first pipe; a guide rod is fixed at the upper end of the sliding block, the guide rod freely passes through the end plate and is connected to a limiting plate.

[0008] The sliding block is a conical block, with the pointed end facing the connecting pipe.

[0009] A spring connects the end plate and the sliding block.

[0010] The first pipe and the connecting pipe, the second pipe and the first pipe, and the pressure gauge connector and the second pipe are all fastened with threaded connections.

[0011] The threaded connections between the first pipe and the connecting pipe, between the second pipe and the first pipe, and between the pressure gauge connector and the second pipe are sealed with sealing rings.

[0012] The first tube, the second tube, and the connecting tube are transparent tubes.

[0013] This utility model provides a device for monitoring the grout fullness of precast shear wall reinforcement sleeves, which has the following technical effects:

[0014] 1) This device monitors the fullness of the grout during the grouting process, changing the existing result-based grout fullness detection method after the grout has solidified to process detection, which is conducive to discovering problems such as grout leakage and timely grouting treatment.

[0015] 2) The connecting pipe and the outer pipe of the gas collector are both made of transparent plastic, forming an L-shaped structure. The grouting situation can be directly observed using the principle of communicating vessels. Due to the small viscosity of the grout and the small change range of the grout end face, the overflow gas can be collected and sealed in a closed container formed by the connecting pipe, the gas collector and the pressure gauge. The pressure gauge can measure the pressure inside the closed container. The grouting fullness of the sleeve can be observed by the change of the pressure gauge index. The observation is convenient, accurate and objective, and the device cost is low.

[0016] 3) Since the connecting pipe, the first pipe, the second pipe and the pressure gauge are all connected by bolts, the pressure gauge, gas collector and other components can be removed and reused after the grout has solidified. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the installation of this utility model.

[0019] Figure 2 for Figure 1 A partial schematic diagram.

[0020] Figure 3 This is the main view of the installation of this utility model.

[0021] Figure 4 This is the front view of the fullness monitoring device of this utility model.

[0022] Figure 5 This is a schematic diagram of the internal structure of the gas collector in this utility model.

[0023] Figure 6 This is a schematic diagram of the operation of this utility model.

[0024] In the diagram: Sleeve 1, Vertical connecting steel bar of upper shear wall 2, Vertical connecting steel bar of lower shear wall 3, Upper shear wall 4, Lower shear wall 5, Floor joint of upper and lower shear walls 6, Connecting pipe 7, Gas collector 8, Pressure gauge 9, Pressure gauge connector 10, Plug 11, First pipe 8.1, Second pipe 8.2, End plate 8.3, Air passage 8.4, Sliding block 8.5, Guide rod 8.6, Limiting plate 8.7, Spring 8.8. Detailed Implementation

[0025] like Figure 1-3 As shown, a device for monitoring the grouting fullness of a precast shear wall reinforcement sleeve includes a sleeve 1, which is a semi-grouting sleeve. The upper end of the sleeve 1 is sleeved with the vertical connecting reinforcement 2 of the upper shear wall, and the lower end of the sleeve 1 is sleeved with the vertical connecting reinforcement 3 of the lower shear wall. A grouting hole and a grout outlet are provided on the side wall of the sleeve 1, with the grouting hole located at the lower part of the sleeve 1 and the grout outlet located at the upper part of the sleeve 1. A fullness monitoring device is installed at the grout outlet to detect the grouting fullness of the sleeve.

[0026] like Figure 4-5 As shown, the fullness monitoring device includes a connecting pipe 7, which is installed at the slurry outlet. The other end of the connecting pipe 7 is connected to a gas collector 8, and the other end of the gas collector 8 is connected to the pressure gauge connector 10 of the pressure gauge 9.

[0027] The gas collector 8 includes a first pipe 8.1, the lower end of which is connected to and maintains communication with the connecting pipe 7, and the upper end of which is connected to and vented by a second pipe 8.2. The upper end of the second pipe 8.2 is connected to and vented by a pressure gauge 9. To prevent grout from entering the air port of the pressure gauge 9, the upper end of the first pipe 8.1 is sealed by an end plate 8.3, which has an air passage hole 8.4. A sliding block 8.5 is provided inside the first pipe 8.1, and the sliding block 8.5 is in clearance fit with the inner wall of the first pipe 8.1, with a relatively small gap of approximately 0.1mm-0.3mm. This facilitates the passage of gas, while preventing the grout with higher viscosity from entering the space above the first pipe 8.1 through the sliding block 8.5. A guide rod 8.6 is fixed to the upper end of the sliding block 8.5, and the guide rod 8.6 freely passes through the end plate 8.3 and is connected to a limiting plate 8.7. By setting the guide rod 8.6 and the limiting plate 8.7, the sliding block 8.5 can be guided and positioned; before it is in operation, the limiting plate 8.7 can restrict the sliding block 8.5 to the summer limit to prevent it from moving further down.

[0028] The sliding block 8.5 is a conical block, with its pointed end facing the connecting pipe 7. Compared to a cylindrical structure, the advantage of using a conical block is that it allows the uppermost grouting material inside the monitoring device to engage well with the sliding block 8.5, pushing it upwards. If the sliding block 8.5 were sheet-shaped, the viscosity of the grouting material might cause the top surface of the grouting material to be uneven, preventing it from effectively pushing the sliding block 8.5 upwards.

[0029] A spring 8.8 is connected between the end plate 8.3 and the sliding block 8.5. By setting the spring 8.8, pressure grouting is adopted. After the grout is full, the pressure is maintained for a few seconds. When the grout is full, the spring 8.8 is compressed to near the end plate 8.3. The reaction force of the end plate 8.3 on the spring makes the grout backfill and fill the gap, ensuring that the grout is dense.

[0030] The first pipe 8.1 and the connecting pipe 7, the second pipe 8.2 and the first pipe 8.1, and the pressure gauge connector 10 and the second pipe 8.2 are all fastened with threaded connections. This facilitates connection and disassembly.

[0031] The threaded connections between the first pipe 8.1 and the connecting pipe 7, between the second pipe 8.2 and the first pipe 8.1, and between the pressure gauge connector 10 and the second pipe 8.2 are sealed with sealing rings. This ensures the sealing of the connections.

[0032] The first tube 8.1, the second tube 8.2, and the connecting tube 7 are all transparent tubes. This facilitates observation.

[0033] like Figure 3 As shown, a plug 11 is threadedly connected to the grouting hole of sleeve 1. The plug 11 is a transparent tube, with one end of the plug 11 open and the other end closed away from the grouting hole. Since there are multiple reinforcing bars in the precast shear wall reinforcement connection, a sleeve 1 is installed at each reinforcing bar. After sealing, only one grouting hole is set inside the chamber; that is, only the grouting hole of one of the multiple sleeves 1 is connected to the grouting pipe. The grouting holes of the remaining sleeves 1 are sealed with plugs 11 to facilitate observation of the grouting process.

[0034] Working principle and process:

[0035] like Figure 6 As shown, after the precast shear wall is installed at its bottom and sealed around the floor joint 6 between the upper and lower shear walls (using sealing material), the gaps formed by all the reinforcing bars and corresponding sleeves 1 within the cavity form a connected cavity with the floor joint 6 between the upper and lower shear walls. Grouting is required within this cavity. Grouting is performed through the grouting hole at the bottom of one of the sleeves 1, gradually filling the cavity while simultaneously displacing any gas inside.

[0036] 2) After the cavity is filled with grout, the grout will overflow from the outlet and then fill the connecting pipe 7, and gradually enter the first pipe 8.1. At this time, it can be preliminarily confirmed by observation that the sleeve 1 is full of grout. At the same time, during the grouting process, most of the gas enters the gas collector 8 through the connecting pipe 7. As the grout enters, the space for gas becomes smaller and smaller, the gas is compressed, and the pressure becomes larger and larger.

[0037] 3) Once grouting is complete, the gas pressure detected by pressure gauge 9 will reach a peak value. If there is grout leakage, the grout material in the cavity will flow out, and the pressure detected by pressure gauge 9 will decrease. Observing the pressure change inside sleeve 1 through the pointer of pressure gauge 9 will be more intuitive and safer.

[0038] Grout leakage is commonly caused by blocked grouting pipes or inadequate sealing.

[0039] Grout leakage will cause the grout material that should be poured into the internal cavity to flow out, resulting in incomplete grouting within the cavity. If grout leakage occurs during grouting, grouting should be stopped and the leaking area repaired. If the leakage is severe, the precast wall panel should be lifted and resealed.

[0040] This device monitors the grout fullness during the grouting process, ensuring grout compaction. If leakage occurs, the pressure gauge readings can be used to observe and promptly detect and address the issue. Furthermore, it changes the traditional process where grout overflows from the outlet and is sealed with a wooden plug. Because grout has a certain viscosity, overflowing grout does not guarantee full grouting, and the fullness of grout above the outlet on the upper part of the sleeve cannot be guaranteed. Using this monitoring device saves labor, reduces workload, and reduces the number of grouting workers from two to one, while also conserving grout and improving the level of civilized construction.

Claims

1. A device for monitoring the grout fullness of precast shear wall reinforcement sleeves, characterized in that: The device comprises a sleeve (1), the lower end of which is provided with a grouting hole and the upper end of which is provided with a grout outlet; a fullness monitoring device is installed at the grout outlet; The fullness monitoring device comprises a connecting pipe (7) installed at the grout outlet, the other end of the connecting pipe (7) being connected with a gas collector (8), the other end of the gas collector (8) being connected with a pressure gauge joint (10) of a pressure gauge (9).

2. The precast shear wall steel bar sleeve grouting fullness monitoring device according to claim 1, characterized in that: The gas collector (8) comprises a first pipe (8.1) in communication with the connecting pipe (7) at the lower end and connected with a second pipe (8.2) at the upper end and ventilated; the upper end of the second pipe (8.2) is connected with the pressure gauge (9) and ventilated; the upper end of the first pipe (8.1) is sealed by an end plate (8.3), the end plate (8.3) being provided with a gas passing hole (8.4), the first pipe (8.1) being provided with a sliding block (8.5), the sliding block (8.5) being in clearance fit with the inner wall of the first pipe (8.1); the upper end of the sliding block (8.5) is fixed with a guide rod (8.6), the guide rod (8.6) freely penetrating through the end plate (8.3) and being connected with a limiting plate (8.7).

3. The precast shear wall steel sleeve grouting fullness monitoring device according to claim 2, characterized in that: The sliding block (8.5) is a tapered block, the side of the tapered block facing the connecting pipe (7) being a pointed end.

4. The precast shear wall steel sleeve grouting fullness monitoring device according to claim 3, characterized in that: A spring (8.8) is connected between the end plate (8.3) and the sliding block (8.5).

5. The precast shear wall steel sleeve grouting fullness monitoring device according to claim 4, characterized in that: The first pipe (8.1) and the connecting pipe (7), the second pipe (8.2) and the first pipe (8.1), and the pressure gauge joint (10) and the second pipe (8.2) are all fastened by screw threads.

6. The precast shear wall steel sleeve grouting fullness monitoring device according to claim 5, characterized in that: The screw thread connections between the first pipe (8.1) and the connecting pipe (7), the second pipe (8.2) and the first pipe (8.1), and the pressure gauge joint (10) and the second pipe (8.2) are sealed by sealing rings.

7. The precast shear wall steel sleeve grouting fullness monitoring device according to claim 6, characterized in that: The first pipe (8.1), the second pipe (8.2) and the connecting pipe (7) are transparent pipes.

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