Installation Structure and Construction Method of Precast Beams and Columns Made from Compressed Cast Recycled Concrete

Abstract

This invention relates to the field of precast concrete technology, and particularly to an installation structure and construction method for precast beams and columns made of compressed recycled concrete. The installation structure comprises: a beam / column body, which includes several precast segments, with post-casting components on the outer side of each segment; a connection assembly, which includes a positioning mechanism, a guiding mechanism, and a reinforcing mechanism; and a self-triggered rust-prevention assembly, which includes an oil storage mechanism, an insertion triggering mechanism, and a spraying mechanism. The self-triggered rust-prevention assembly of this application automatically triggers the spraying of rust-preventive oil during the connection process of the positioning mechanism, improving rust-prevention efficiency, ensuring uniform coverage of the rust-preventive oil, and effectively preventing corrosion at the connection points. Furthermore, the post-casting components on the outer side of the precast segments further enhance the overall structural performance of the beam and column, resulting in higher quality, reliability, and durability for the entire installation structure.

Description

Technical Field

[0001] This invention relates to the field of precast concrete technology, specifically to the installation structure and construction method of precast beams and columns made from compressed cast recycled concrete. Background Technology

[0002] Recycled block concrete (recycled concrete for short) has rapidly attracted widespread attention due to its advantages such as high solid waste utilization rate and convenient production. This technology involves crushing waste concrete into recycled blocks, which are then mixed with fresh concrete and poured to form recycled concrete. Since recycled blocks originate from old concrete, their mechanical properties are generally weaker, and the mechanical properties of recycled concrete often exhibit significant deterioration, severely restricting its large-scale engineering application. Using a compression casting method can significantly improve the mechanical properties of recycled block concrete and expand its engineering applicability.

[0003] Due to the difficulty of applying pressure at construction sites, compression casting of recycled concrete is more suitable for producing precast components. Currently, however, significant challenges remain in producing large-sized precast concrete components using this method. For beams, slabs, and columns using horizontal casting, the large length of their long sides (i.e., column height, beam and slab length) significantly increases the difficulty of applying pressure synchronously along the component's length (e.g., leakage leading to pressure loss). This also presents significant challenges to the size and load-bearing capacity of the pressure-applying equipment and casting molds. If a vertical casting process is used, compression casting is equally difficult to implement due to the obstruction of vertical reinforcement (such as longitudinal reinforcement in beams and columns). Therefore, a more suitable approach is to use compression casting technology to produce precast recycled concrete segments (referred to as precast segments), transport them to the construction site, hoist them to the construction location during component construction, and cast them together with subsequent concrete to form beam and column components.

[0004] However, when constructing precast beams and columns from compressed cast recycled concrete using precast segments, the connection of precast segments relies on manual alignment, which lacks effective guidance, resulting in low installation accuracy and efficiency. Metal connectors or concrete contact surfaces at the joints of adjacent segments are prone to corrosion, and conventional rust prevention requires additional manual application, which is difficult to guarantee in a comprehensive and timely manner. When relying solely on simple positioning mechanisms for connection, the strength is insufficient, and loosening and deformation are likely to occur under long-term loads, resulting in poor stability. Summary of the Invention

[0005] The purpose of this invention is to provide a precast beam and column installation structure and construction method using compressed cast recycled concrete, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] On the one hand, a precast beam-column installation structure made of compressed cast recycled concrete is provided, comprising:

[0008] The main beam and column structure comprises several precast segments, and post-cast components are provided on the outer side of the precast segments;

[0009] The docking assembly includes a positioning mechanism, a guiding mechanism, and a reinforcing mechanism. Adjacent prefabricated segments are connected by the positioning mechanism. The guiding mechanism guides the positioning mechanism when adjacent prefabricated segments are connected. The reinforcing mechanism reinforces the positioning mechanism.

[0010] The self-triggering rust prevention component includes an oil storage mechanism, an insertion trigger mechanism, and a spraying mechanism. The oil storage mechanism is used to store rust-preventive oil. The insertion trigger mechanism is used to trigger the opening of the spraying mechanism when the positioning mechanism connects adjacent prefabricated segments. The spraying mechanism is used to spray the rust-preventive oil in the oil storage mechanism between adjacent prefabricated segments.

[0011] Preferably, the post-cast component includes a reinforcing cage and a concrete pouring layer, wherein the reinforcing cage is sleeved on the outside of the precast segment, the reinforcing cage is disposed inside the concrete pouring layer, and the concrete pouring layer wraps around the outside of the precast segment.

[0012] Preferably, the reinforcing cage includes spiral stirrups and longitudinal bars, the longitudinal bars being arranged along the axial direction of the spiral stirrups, and a plurality of the longitudinal bars being arranged around the spiral stirrups.

[0013] Preferably, the positioning mechanism includes a steel base and a positioning pin, with the steel base provided on both sides of the precast segment, and the positioning pin and the guiding mechanism respectively provided on different steel bases.

[0014] Preferably, the guiding mechanism includes a guide sleeve disposed on the steel base, and a plurality of positioning pins are provided. The number of guide sleeves is set corresponding to the number of positioning pins. When adjacent prefabricated segments are connected to each other, the positioning pins are inserted into the guide sleeves.

[0015] Preferably, the steel base has a guide groove and an adjustment groove, the bottom of the guide sleeve has a trapezoidal portion, and the reinforcement mechanism includes a support rod, a guide rack, a transmission gear, and a reinforcement rack. The support rod is disposed in the guide groove and has a fracture induction groove. The trapezoidal portion and the guide rack are in contact with each other. When the guide sleeve moves along the guide groove, it will drive the guide rack to move along the adjustment groove. The transmission gear is disposed in the adjustment groove, and the guide rack and the transmission gear mesh with each other. The adjustment groove is provided with the reinforcement rack, and the reinforcement rack also meshes with the transmission gear.

[0016] Preferably, the reinforcement mechanism is provided in three sets, which are arranged around the guide groove. The oil storage mechanism includes a hydraulic cylinder, which is disposed in the guide groove and is arranged corresponding to the reinforcement mechanism.

[0017] Preferably, the insertion triggering mechanism includes a piston block connected to the reinforcing rack, and the piston end of the piston block is connected to the hydraulic cylinder.

[0018] Preferably, the spraying mechanism includes an oil injector, which is disposed in the oil cylinder. When the reinforcing rack drives the piston block to move along the oil cylinder, the rust-preventive oil will be sprayed out from the oil injector.

[0019] On the other hand, a construction method is provided for installing precast beam-column structures using the aforementioned compressed cast recycled concrete, comprising the following steps:

[0020] A. Hoist the first precast segment to the preset position and secure it firmly with temporary supports;

[0021] B. On top of the prefabricated segment, ensure that the positioning mechanism, guiding mechanism, and oil storage and spraying mechanism of the self-triggered rust prevention component are pre-positioned.

[0022] C. Hoist the adjacent precast segments and lower them slowly;

[0023] D, During the insertion and positioning process of the positioning mechanism, its end will automatically trigger the insertion trigger mechanism of the self-triggering anti-rust component;

[0024] E. After the trigger mechanism is activated, the spraying mechanism will be activated immediately to spray the anti-rust oil in the oil storage mechanism into the joint between the positioning mechanism and the adjacent precast segment.

[0025] F. After all precast segments are assembled, connected, and reinforced, install and fix the formwork for the post-cast components, and pour high-performance concrete into the reserved post-cast area to wrap the connection area and integrate it with the precast segments into a whole.

[0026] Compared with existing technologies, the beneficial effects of this invention are as follows: The positioning mechanism in the docking assembly ensures precise connection between adjacent precast segments, the guiding mechanism makes the docking process smoother, reducing construction difficulty and time costs, and the reinforcement mechanism enhances the firmness and long-term stability of the connection. The self-triggered rust-preventing assembly automatically triggers the spraying of rust-preventive oil when the positioning mechanism connects, improving the efficiency of rust prevention treatment, ensuring uniform coverage of the rust-preventive oil, and effectively preventing corrosion of the connection. Moreover, the post-cast assembly on the outside of the precast segments further enhances the overall structural performance of the beams and columns, giving the entire installation structure higher quality, reliability, and durability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0028] Figure 2 This is a schematic diagram showing the positions and structures of the prefabricated segments, reinforcing cage, and steel base of the present invention.

[0029] Figure 3 This is a schematic diagram showing the location and structure of the prefabricated segments and steel base of the present invention;

[0030] Figure 4 This is a schematic diagram showing the position and structure of the steel base, locating pin, and guide sleeve of the present invention;

[0031] Figure 5 This is a schematic diagram of the internal structure of the steel base with guide sleeve of the present invention (the steel base is rendered in perspective).

[0032] Figure 6 This is a schematic cross-sectional view of the internal structure of the steel base in the broken state of the support rod of the present invention (the support rod is already broken at this time, so the broken support rod is omitted in the figure).

[0033] Figure 7 This is a schematic diagram of the internal cross-sectional structure of the steel base in the support state of the support rod of the present invention;

[0034] Figure 8 This is a three-dimensional structural diagram of the hydraulic cylinder of the present invention;

[0035] Figure 9 This is a schematic diagram of the connection structure between the reinforced rack and piston block of the present invention.

[0036] In the diagram: 1 Precast segment, 2 Reinforcing cage, 3 Concrete pouring layer, 4 Steel base, 5 Positioning pin, 6 Guide sleeve, 7 Support rod, 8 Guide rack, 9 Transmission gear, 10 Reinforcing rack, 11 Hydraulic cylinder, 12 Piston block, 13 Injector nozzle, 201 Spiral stirrup, 202 Longitudinal reinforcement, 401 Guide groove, 402 Adjustment groove, 601 Trapezoidal part, 701 Fracture induction groove. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1-9 The present invention provides a technical solution:

[0039] An installation structure for precast beams and columns made from compressed cast recycled concrete, as shown in the attached instruction manual. Figure 1 As shown, it includes:

[0040] The main beam and column structure includes several precast segments 1, and post-cast components are provided on the outer side of the precast segments 1.

[0041] The docking assembly includes a positioning mechanism, a guiding mechanism, and a reinforcing mechanism. Adjacent prefabricated segments 1 are connected by the positioning mechanism, the guiding mechanism is used to guide the positioning mechanism when adjacent prefabricated segments 1 are connected, and the reinforcing mechanism is used to reinforce the positioning mechanism.

[0042] The self-triggering rust prevention component includes an oil storage mechanism, an insertion trigger mechanism, and a spraying mechanism. The oil storage mechanism is used to store rust-preventive oil. The insertion trigger mechanism is used to trigger the opening of the spraying mechanism when the positioning mechanism connects adjacent prefabricated segments 1. The spraying mechanism is used to spray the rust-preventive oil in the oil storage mechanism between adjacent prefabricated segments 1.

[0043] The post-cast component includes a reinforcing cage 2 and a concrete pouring layer 3. The reinforcing cage 2 is fitted outside the precast segment 1 and placed inside the concrete pouring layer 3. The concrete pouring layer 3 wraps around the outside of the precast segment 1. The reinforcing cage 2 provides support and reinforcement for the concrete pouring layer 3, while the concrete pouring layer 3 tightly wraps the precast segment 1, further improving the overall strength and durability of the beam and column.

[0044] The reinforcing cage 2 includes spiral stirrups 201 and longitudinal bars 202. The longitudinal bars 202 are arranged along the axial direction of the spiral stirrups 201, and several longitudinal bars 202 are arranged around the spiral stirrups 201. Through reasonable spacing and arrangement, the spiral stirrups 201 and longitudinal bars 202 form a robust reinforcing steel skeleton structure. This structure can not only effectively resist the lateral pressure generated during concrete pouring and prevent deformation of the reinforcing cage 2, but also work together with the concrete to share the tensile and compressive forces when the beam and column are under load, significantly improving the load-bearing capacity and crack resistance of the beam and column. At the same time, the setting of the reinforcing cage 2 also enhances the bond between the precast segment 1 and the post-poured concrete, making the entire beam and column structure more compact and stable, further improving the overall integrity and reliability of the structure.

[0045] The positioning mechanism includes a steel seat 4 and a positioning pin 5. Steel seats 4 are provided on both sides of the precast segment 1. The positioning pin 5 and the guide mechanism are respectively set on different steel seats 4. The positioning pin 5 plays a positioning role and can effectively enhance the shear resistance of the precast segment 1 after connection, effectively improving the structural stability of the precast beam and column of compressed cast recycled concrete. The positioning pin 5 has good wear resistance and shear resistance, and can stably fix adjacent precast segments 1 during the connection process to prevent loosening and displacement.

[0046] The guiding mechanism includes guide sleeves 6, which are mounted on the steel base 4. Several positioning pins 5 are provided, with the number of guide sleeves 6 corresponding to the number of positioning pins 5. When adjacent precast segments 1 are connected, the positioning pins 5 are inserted into the guide sleeves 6. The guide sleeves 6 provide a precise path guide for the insertion of the positioning pins 5, ensuring that the positioning pins 5 accurately enter the corresponding holes, avoiding connection difficulties or insecure connections due to positioning deviations. This design allows adjacent precast segments 1 to be quickly aligned during the connection process, reducing adjustment time during installation and improving construction efficiency.

[0047] The steel base 4 has a guide groove 401 and an adjustment groove 402. The bottom of the guide sleeve 6 has a trapezoidal part 601. The reinforcement mechanism includes a support rod 7, a guide rack 8, a transmission gear 9, and a reinforcement rack 10. Each set of reinforcement mechanisms has two symmetrically arranged support rods 7, guide racks 8, transmission gears 9, and reinforcement racks 10. The support rod 7 is located in the guide groove 401 and has a fracture induction groove 701. The trapezoidal part 601 and the guide rack 8 are in contact with each other. When the guide sleeve 6 moves along the guide groove 401, it will drive the guide rack 8 to move along the adjustment groove 402. The transmission gear 9 is located in the adjustment groove 402. The guide rack 8 and the transmission gear 9 mesh with each other. The adjustment groove 402 has a reinforcement rack 10, which also meshes with the transmission gear 9. When the guide rack 8 moves along the adjustment groove 402 under the drive of the guide sleeve 6, it will drive the transmission gear 9 that meshes with it to rotate. The rotation of the transmission gear 9 further drives the movement of the reinforcing rack 10. Since the reinforcing rack 10 and the transmission gear 9 mesh with each other, their movement direction is opposite to that of the guide rack 8. The support rod 7 is used to provide stable support and guidance for the guide sleeve 6 in the guide groove 401 when the positioning groove is not inserted. The fracture induction groove 701 enables the support rod 7 to break in a predetermined manner under specific stress conditions to release stress and avoid damage to the entire structure.

[0048] The reinforcement mechanism is provided in three sets, which are arranged around the guide groove 401. The oil storage mechanism includes an oil cylinder 11, which is set in the guide groove 401 and is arranged corresponding to the reinforcement mechanism. The oil cylinder 11 is filled with sufficient rust-preventive oil. One end of the oil cylinder 11 is provided with an oil outlet, which is connected to the spraying mechanism to provide a channel for spraying the rust-preventive oil.

[0049] The insertion trigger mechanism includes a piston block 12, which is connected to a reinforcing rack 10. The piston end of the piston block 12 is connected to a hydraulic cylinder 11, and the piston end fits tightly against the inner wall of the hydraulic cylinder 11, providing good sealing performance. When the reinforcing rack 10 moves under the drive of the transmission gear 9, it synchronously pulls the piston block 12 to move within the hydraulic cylinder 11. As the piston block 12 moves, the rust-preventive oil inside the hydraulic cylinder 11 is compressed, and the pressure gradually increases. This pressure change provides the power for the injection of the rust-preventive oil, ensuring that the rust-preventive oil can be smoothly delivered to the nozzle 13 through the oil outlet and connecting pipe when needed.

[0050] The injection mechanism includes an oil injector 13, which is located in the oil cylinder 11. When the reinforcing rack 10 drives the piston block 12 to move along the oil cylinder 11, the rust-preventive oil will be sprayed out from the oil injector 13.

[0051] Working principle:

[0052] During the installation of the precast beams and columns made of compressed cast recycled concrete, adjacent precast segments 1 are first hoisted closer together, aligning the positioning pins 5 in the positioning mechanism with the guide sleeves 6 in the guiding mechanism. As the precast segments 1 move closer, the positioning pins 5 insert into the guide sleeves 6. During this process, the support rods 7 break first, and the guide sleeves 6 move along the guide grooves 401 on the steel base 4, simultaneously driving the guide rack 8 to move along the adjusting grooves 402. Since the guide rack 8 and the transmission gear 9 mesh with each other, the transmission gear 9 rotates accordingly, thereby driving the reinforcing rack 10, which also meshes with the transmission gear 9, to move.

[0053] The movement of the reinforcing rack 10 will clamp the guide sleeve 6. The three sets of reinforcing mechanisms arranged around the guide groove 401 work together to enhance the stability of the connection between adjacent prefabricated segments 1.

[0054] During the movement of the reinforcing rack 10, the piston block 12 connected to the reinforcing rack 10 also moves along the hydraulic cylinder 11. When the piston block 12 moves, it squeezes the rust-preventive oil in the hydraulic cylinder 11, causing the rust-preventive oil to be sprayed out from the oil nozzle 13 set on the hydraulic cylinder 11 and sprayed between adjacent precast segments 1, thus playing a role in rust prevention. This completes the entire installation process and ensures the stability and durability of the precast beam and column installation structure made of compressed cast recycled concrete.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An installation structure for precast beams and columns made of compressed cast recycled concrete, characterized in that, include: The main beam and column structure comprises several precast segments, and post-cast components are provided on the outer side of the precast segments; The docking assembly includes a positioning mechanism, a guiding mechanism, and a reinforcing mechanism. Adjacent prefabricated segments are connected by the positioning mechanism. The guiding mechanism guides the positioning mechanism when adjacent prefabricated segments are connected. The reinforcing mechanism reinforces the positioning mechanism. The self-triggering rust prevention component includes an oil storage mechanism, an insertion trigger mechanism, and a spraying mechanism. The oil storage mechanism is used to store rust-preventive oil. The insertion trigger mechanism is used to trigger the opening of the spraying mechanism when the positioning mechanism connects adjacent prefabricated segments. The spraying mechanism is used to spray the rust-preventive oil in the oil storage mechanism between adjacent prefabricated segments. The positioning mechanism includes a steel base and a positioning pin. The steel base is provided on both sides of the precast segment, and the positioning pin and the guiding mechanism are respectively provided on different steel bases. The guiding mechanism includes a guide sleeve disposed on the steel base. A plurality of positioning pins are provided. The number of guide sleeves is set in accordance with the number of positioning pins. When adjacent prefabricated segments are connected to each other, the positioning pins are inserted into the guide sleeves. The steel base has a guide groove and an adjustment groove. The bottom of the guide sleeve has a trapezoidal portion. The reinforcement mechanism includes a support rod, a guide rack, a transmission gear, and a reinforcement rack. The support rod is located in the guide groove and has a fracture induction groove. The trapezoidal portion and the guide rack are in contact with each other. When the guide sleeve moves along the guide groove, it will drive the guide rack to move along the adjustment groove. The transmission gear is located in the adjustment groove, and the guide rack and the transmission gear mesh with each other. The adjustment groove has the reinforcement rack, which also meshes with the transmission gear.

2. The installation structure for precast beams and columns made of compressed cast recycled concrete according to claim 1, characterized in that: The post-cast component includes a reinforcing cage and a concrete pouring layer. The reinforcing cage is fitted outside the precast segment, the reinforcing cage is placed inside the concrete pouring layer, and the concrete pouring layer wraps around the outside of the precast segment.

3. The installation structure for precast beams and columns made of compressed cast recycled concrete according to claim 2, characterized in that: The steel cage includes spiral stirrups and longitudinal bars. The longitudinal bars are arranged along the axial direction of the spiral stirrups, and a plurality of longitudinal bars are arranged around the spiral stirrups.

4. The installation structure for precast beams and columns made of compressed cast recycled concrete according to claim 1, characterized in that: The reinforcement mechanism is provided in three sets, which are arranged around the guide groove. The oil storage mechanism includes an oil cylinder, which is arranged in the guide groove and is corresponding to the reinforcement mechanism.

5. The installation structure for precast beams and columns made of compressed cast recycled concrete according to claim 4, characterized in that: The insertion triggering mechanism includes a piston block connected to the reinforcing rack, and the piston end of the piston block connected to the hydraulic cylinder.

6. The installation structure for precast beams and columns made of compressed cast recycled concrete according to claim 5, characterized in that: The injection mechanism includes an oil nozzle, which is disposed in the oil cylinder. When the reinforcing rack drives the piston block to move along the oil cylinder, rust-preventive oil will be sprayed out from the oil nozzle.

7. A construction method for installing precast beam-column structures using compressed cast recycled concrete as described in any one of claims 1 to 6, characterized in that, Includes the following steps: A. Hoist the first precast segment to the preset position and secure it firmly with temporary supports; B. On the top of the prefabricated segment, ensure that the positioning mechanism, guiding mechanism, and oil storage and spraying mechanism of the self-triggered rust prevention component are pre-positioned. C. Hoist the adjacent precast segments and lower them slowly; D, During the insertion and positioning process of the positioning mechanism, its end will automatically trigger the insertion trigger mechanism of the self-triggering anti-rust component; E. After the trigger mechanism is activated, the spraying mechanism will be activated immediately to spray the anti-rust oil in the oil storage mechanism into the joint between the positioning mechanism and the adjacent precast segment. F. After all precast segments are assembled, connected, and reinforced, install and fix the formwork for the post-cast components, and pour high-performance concrete into the reserved post-cast area to wrap the connection area and integrate it with the precast segments into a whole.

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