CN115262998B - Construction process for vertically reserving steel bar hanging alignment of assembled shear wall - Google Patents

Abstract

The invention relates to the field of civil engineering construction, in particular to a construction process for vertically reserving reinforcement hanging and aligning an assembled shear wall. After the method is adopted, the positions of the reinforcing steel bars and the reserved holes can be accurately and rapidly positioned, the placement speed of the fabricated shear wall is greatly improved, and the construction efficiency is improved.

Description

Construction technology of vertical reserved steel bars for hanging and positioning of prefabricated shear walls

Technical field

The invention relates to the field of civil engineering construction, and specifically refers to the construction technology of vertically reserved steel bars for hanging and aligning prefabricated shear walls.

Background technique

Prefabricated building is a modern civil engineering construction technology advocated by the country. Since the accessories required for the building structure are made in advance in the factory, the structure and shape of the accessories are well processed during production, which reduces the operating procedures on the construction site and improves the construction efficiency. Great improvement. Prefabricated buildings have received widespread attention and application in different countries and regions due to their powerful advantages.

In prefabricated buildings, shear walls are the main stress-bearing components and play an important role in ensuring the stability of the structure. The component joints are generally the weak links that bear stress, so steel bars and prefabricated components are usually reserved at the joints of prefabricated components. Leave grouting holes and pour cement mortar to connect the components into a whole. However, there is a construction positioning problem during the hoisting and installation process of reserved steel bars and reserved grouting holes, and the accuracy of its positioning is of great significance to the placement of components. The current hoisting and alignment process of prefabricated shear walls and columns usually uses manual hand support to slowly drop, and use a mirror to observe whether the steel bars are aligned with the holes. This installation method cannot meet the installation accuracy of prefabricated components, and it is not easy to accurately reserve steel bars. When entering the reserved grouting holes, the reserved steel bars are easily bent when there is a deviation in the placement of the reserved steel bars, which seriously affects the construction efficiency and construction quality.

The existing patent (CN211850963U) discloses a detachable steel bar positioning device for shear walls, which is used to position cast-in-place reinforced concrete structures to prevent steel bars from shifting due to concrete pouring or other reasons. In the production of positioning sleeves The process must correspond one-to-one with the size, quantity, and spacing of the steel bars in the shear wall, and cannot meet the needs of various types of shear walls.

The existing patent (CN202767370U) discloses a shear wall steel bar positioning frame clamp. Fixing a U-shape on the longitudinal bars of the ladder bars is more complicated to operate and difficult to correct in the face of inaccurate positioning.

The existing patent (CN108952014 A) discloses a detachable steel bar positioning device for shear walls. It only considers the problem of positioning accuracy, but the material cannot be recycled, which will also be a huge waste of materials.

The above three patents are mainly based on cast-in-place concrete structures, which are quite different from the prefabricated construction technology.

Therefore, the inventor conducted further research on this and developed a construction technology for vertically reserved steel bars of prefabricated shear walls to be suspended and aligned, and this case was born from this.

Contents of the invention

The purpose of the present invention is to provide a construction technology for hanging and aligning vertical reserved steel bars in prefabricated shear walls, which can accurately and quickly locate the positions of steel bars and reserved holes, greatly improve the placement speed of prefabricated shear walls, and improve construction efficiency. .

In order to achieve the above objects, the technical solutions of the present invention are as follows:

The construction process of vertically reserved steel bars for prefabricated shear walls includes the following steps:

Step 1: Thread the thin steel pipe to one end of the thick steel pipe. The other end of the thick steel pipe is connected to the spring and the steel bar inside the spring. The end of the steel bar inside the spring is equipped with a steel sheet. The spring is connected to the pad. Under the pad Smooth round steel bars are provided, and the above-mentioned connecting structure is the basic structure of the positioning device;

Step 2: Compress the spring, insert a pin into the spring and press it against the steel sheet to keep the spring in a compressed state;

Step 3: Connect through hooks and wire ropes to lift the upper shear wall;

Step 4: Lift the upper shear wall to a preset position above the lower shear wall, stop falling, and adjust the position;

Step 5: Insert the reserved connecting steel bar at one corner of the upper shear wall into the thin steel pipe and push it against the upper shear wall. Pull the pin outward to make the spring pop out and pass through the thread between the thin steel pipe and the thick steel pipe. Adjust the relative lengths of the two steel pipes so that the smooth round steel bars enter the reserved grouting holes of the lower shear wall, and the bottom surface of the pad is completely in contact with the lower shear wall;

Step 6: Repeat the process of Step 5 for the opposite corner of the installation process in Step 5, so that the positioning devices on the two diagonals are at the same height. At this time, the reserved connecting steel bars are directly above the reserved grouting holes;

Step 7: Place the two temporary guide devices at the two opposite corners of the upper shear wall, and take out the positioning devices at the two opposite corners;

Step 8: Continue to install the upper shear wall downwards, and workers will assist the stabilizing member to slowly fall to complete the final installation process;

Step 9: Install shear wall supports.

Through the telescopically controlled positioning device, the upper shear wall and the lower shear wall are first positioned, and then guided and installed through the guide device to quickly locate the steel bars and reserved holes, which greatly improves the placement of the prefabricated shear wall. speed, improving construction efficiency.

Further, an annular sleeve baffle is provided on the backing plate, and the latch passes through the annular sleeve baffle.

The annular sleeve stop guides the limiting pin.

Further, the temporary guide device includes a strip angle steel with a length of at least 1 meter. A steel pedal is welded on the outside of the bottom of the angle steel, a leveling pipe bracket is welded on the upper part, and a leveling pipe is set.

Further, in the seventh step, the right-angled inner side of the strip angle steel is in contact with the upper shear wall. The temporary guide device is placed on the lower shear wall. The operator is allowed to stand on it through the pedal to maintain stability. At this time, adjust the positioning device Use two steel pipes to take out the positioning devices on the two opposite corners.

Furthermore, in the eighth step, when the upper shear wall is continued to be placed downward, the leveling tube is used to detect whether the upper shear wall is shaking or shifting left and right when it falls, and the shear wall is corrected in time to ensure its accurate fall.

Furthermore, a support frame is provided at one end of the strip angle steel located at the lower shear wall.

After adopting the above solution, compared with the existing technology, the present invention has the following advantages:

1. It can accurately and quickly locate the positions of steel bars and reserved holes, greatly improving the installation speed of prefabricated shear walls and improving construction efficiency;

2. The equipment is reusable, small in size, and convenient for storage and transportation;

3. The equipment is simple and the operation method is simple, and it is suitable for large-scale application in prefabricated building construction.

Description of drawings

Figure 1 is a schematic diagram of the hanging of the present invention;

Figure 2 is a schematic diagram of the positioning device spring when it is compressed;

Figure 3 is a schematic diagram of the positioning device spring when it is in relaxation;

Figure 4 is a partial schematic diagram of the linkage between the latch and the steel plate;

Figure 5 is a schematic diagram of the temporary guide device;

Label description

The upper shear wall 1 has reserved connecting steel bars 11, the lower shear wall 2 has reserved grouting holes 21,

Positioning device 3, thin steel pipe 31, thick steel pipe 32, spring 33, spring internal steel bar 34,

Steel sheet 35, latch 36, annular sleeve block 37, backing plate 38, plain round steel bar 39,

Temporary guide device 4, bar angle steel 41, pedal 42, level pipe 43,

Hook 5, wire rope 6.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in the figure, a construction technology for vertically reserved steel bars of prefabricated shear walls to be suspended and aligned is to first prepare the positioning device 3 and the temporary guide device 4.

(1) Positioning device 3: Use two threaded steel pipes. The outer thread of the thin steel pipe 31 is 100mm from bottom to top. The steel pipe is 300mm long, the inner diameter is 15mm, and the wall thickness is 4mm. The thick steel pipe 32 has full-length threads on the inner side. The steel pipe is 250mm long and has an inner diameter. 23mm, wall thickness 4mm, two steel pipes are screwed together through threads. The reserved connecting steel bar 11 has a diameter of 14mm, and the inner diameter of the thin steel pipe 31 is slightly larger than the diameter of the steel bar to be connected, and the gap is preferably 1mm to 2mm. A steel sheet 35 is welded to the bottom of the thick steel pipe 32. The lower part of the steel sheet 35 is connected to a spring 33. An internal steel bar 34 of the spring is provided as a lifting device for the spring 33. The other end of the spring 33 is connected to a circular pad 38. The welding length below the pad 38 is The diameter of the 100mm smooth round steel bar 39 is slightly smaller than the reserved hole, and the gap is preferably 1mm to 2mm. When making the entire device, the center lines of the two steel pipes, springs 33, and smooth round steel bars 39 must be on a straight line. Two sets of this device are made.

(2) Temporary guide device 4: Use strip angle steel 41: 12.5cm*12.5cm*5mm, length 1m, weld a steel pedal 42 on the outside of the bottom of the strip angle steel 41, weld the level pipe 43 bracket on the upper part, and place the level pipe 43 , make two sets of this device.

The construction steps are as follows:

Step 1: Connect the thin steel pipe 31 to the thick steel pipe 32 through threads. The thick steel pipe 32 is connected to the spring 33 and the internal steel bar 34 of the spring. The internal steel bar 34 of the spring is welded to the steel sheet 35. The lower part of the spring 33 is welded to the pad 38. The annular sleeve block 37 is welded on the upper part of the plate 38, and the smooth round steel bar 39 is welded on the other side of the backing plate 38. The connections of the thin steel pipe 31, the thick steel pipe 32, the spring 33, the spring internal steel bar 34, and the smooth round steel bar 39 are all on the same vertical axis. Straight direction.

Step 2: Place the latch 36 in the annular baffle, place it 3mm into the hole of the spring 33, compress the spring 33 to 100mm, and place the latch 36 on the steel plate 35.

Step 3: Connect the hook 5 to the lifting point and the wire rope 6 to lift the upper shear wall 1.

Step 4: Lift the upper shear wall 1 to about 500mm above the lower shear wall 2, stop falling, and roughly adjust its position.

Step 5: Use the positioning device 3 of the present invention to insert the reserved connecting steel bars 11 at the corners of the shear wall into the thin steel pipe 31 and make it resist the upper shear wall 1. Pull out the latch 36 to pop out the spring 33. Slightly adjust the length of the two steel pipes through the threads between the steel pipes, so that the smooth round steel bars 39 enter the reserved grouting holes 21, and the bottom surface of the pad 38 is completely in contact with the lower shear wall 2. The upper part of the positioning device 3 is The upper shear wall 1 is placed, and the lower pad 38 is placed flat on the lower shear wall 2.

Step 6: Place the reserved connecting steel bars 11 at the opposite corners of the shear wall in step 5, repeat the process of step 5, and adjust the installed positioning device 3 to the same height through the threads on the two steel pipes. At this time, reserve The connecting steel bar 11 is directly above the reserved grouting hole 21.

Step 7: Place the two temporary guide devices 4 at two opposite corners of the upper shear wall 1. It is appropriate that the inside of the right angle of the strip angle steel 41 is just in contact with the upper shear wall 1. The temporary guide devices 4 are placed at On the lower shear wall 2, the operator is allowed to stand on the pedal 42 to maintain stability. At this time, the steel pipe threads in the positioning device 3 are adjusted to take out the two diagonal positioning devices 3.

Step 8: Continue to place the upper shear wall 1 downward, and use the leveling tube 43 to detect whether the upper shear wall 1 is shaking or shifting left and right when it falls. Make timely corrections to the shear wall to ensure its accurate fall, and workers will assist in stabilization. The components are allowed to fall slowly to complete the final placement process.

Step 9: Install shear wall supports.

Step 10: Follow this process to continue the construction of other shear walls, reuse them, and keep them properly.

The above are only specific embodiments of the present invention. At the same time, any words such as "upper, lower, left, right, middle" involved in the present invention are for reference only and are not absolute limitations. Any modification shall constitute an infringement of the protection scope of the present invention.

Claims (6)

1. The construction technology of vertically reserved steel bars for fabricated shear walls is characterized by including the following steps: Step 1: Thread the thin steel pipe to one end of the thick steel pipe. The other end of the thick steel pipe is connected to the spring and the steel bar inside the spring. The end of the steel bar inside the spring is equipped with a steel sheet. The spring is connected to the pad. Under the pad A connection structure with smooth round steel bars and thin steel pipes and thick steel pipes is provided as the basic structure of the positioning device; Step 2: Compress the spring, insert a pin into the spring and press it against the steel sheet to keep the spring in a compressed state; Step 3: Connect through hooks and wire ropes to lift the upper shear wall; Step 4: Lift the upper shear wall to a preset position above the lower shear wall, stop falling, and adjust the position; Step 5: Insert the reserved connecting steel bar at one corner of the upper shear wall into the thin steel pipe and push it against the upper shear wall. Pull the pin outward to make the spring pop out and pass through the thread between the thin steel pipe and the thick steel pipe. Adjust the relative lengths of the two steel pipes so that the smooth round steel bars enter the reserved grouting holes of the lower shear wall, and the bottom surface of the pad is completely in contact with the lower shear wall; Step 6: Repeat the process of Step 5 for the opposite corner of the installation process in Step 5, so that the positioning devices on the two diagonals are at the same height. At this time, the reserved connecting steel bars are directly above the reserved grouting holes; Step 7: Place the two temporary guide devices at the two opposite corners of the upper shear wall, and take out the positioning devices at the two opposite corners; Step 8: Continue to install the upper shear wall downwards, and workers will assist the stabilizing member to slowly fall to complete the final installation process; Step 9: Install shear wall supports. 2. The construction technology of vertically reserved steel bars for hanging and aligning the prefabricated shear wall according to claim 1, characterized in that: an annular sleeve block is provided on the backing plate, and the latch is inserted from the annular sleeve block. pass through. 3. The construction technology for hanging and aligning the vertical reserved steel bars of the prefabricated shear wall according to claim 1, characterized in that: the temporary guide device includes a strip angle steel, the length of the strip angle steel is at least 1 meter, and it is at the bottom of the angle steel. A steel pedal is welded on the outside, a level tube bracket is welded on the upper part, and a level tube is set. 4. The construction technology of vertically reserved steel bars for hanging and aligning the prefabricated shear wall according to claim 3, characterized in that: in the seventh step, the right-angled inner side of the strip angle steel is contacted with the upper shear wall, The temporary guide device is placed on the lower shear wall, and the operator is allowed to stand on it through the pedals to maintain stability. At this time, the two steel pipes in the positioning device are adjusted to take out the two diagonal positioning devices. 5. The construction technology of vertically reserved steel bars for hanging and aligning the prefabricated shear wall according to claim 3, characterized in that: in the eighth step, when the upper shear wall is continued to be placed downward, the level pipe is used to detect Whether the upper shear wall shakes or shifts left and right when it falls, correct the shear wall in time to ensure its accurate fall. 6. The construction technology of vertically reserved steel bars for hanging and aligning the prefabricated shear wall according to claim 3, characterized in that: one end of the strip angle steel located at the lower shear wall is provided with a support frame.