Prefabricated building pc component

Abstract

The utility model discloses a kind of fabricated building PC components. Including upper component and lower component, adjacent upper and lower component are connected by bolt. Upper component two ends are equipped with first lug and second groove, lower component end portion is equipped with second lug and first groove, and first lug and first groove, second lug and second groove shape are matched, realize accurate pre-positioning;The surface of the second lug of lower component is equipped with embedded hole, embedded hole is equipped with embedded part containing embedded nut and compression spring, the second groove of upper component is equipped with through-hole, bolt is sequentially connected with embedded nut after passing through through-hole, compression spring is compressed and generates sustained pre-tightening force when tightening bolt. The utility model is embedded by lug and groove to realize quick positioning, and the bolt connection structure of spring pre-tightening is combined to improve connection firmness, effectively solve the problem that existing PC component connection positioning is poor and easy to loosen, convenient to install and suitable for fabricated building construction.

Description

Technical Field

[0001] This article relates to a prefabricated building PC component. Background Technology

[0002] Prefabricated buildings have become an important development direction in the construction industry due to their advantages such as high construction efficiency, environmental friendliness, and controllable quality. PC components, or precast concrete components, are the core components of prefabricated buildings, and their connection stability directly affects the overall structural safety of the building.

[0003] Existing PC component connection methods often have the following problems:

[0004] Low connection positioning accuracy: When adjacent components are spliced ​​together, there is a lack of effective positioning structure, which easily leads to offset and requires repeated adjustments;

[0005] Insufficient connection strength: It relies heavily on bolted connections or grouting for fixation, and is prone to loosening due to temperature changes, vibrations, etc.

[0006] Poor installation convenience: Some connection structures require complex on-site operations (such as secondary grouting and curing), which prolongs the construction period;

[0007] Poor waterproofing and durability: Water easily seeps into the joints, causing the internal steel bars of the components to rust and affecting their service life.

[0008] Therefore, it is necessary to design a PC component that is precise in positioning, firmly connected, efficient in installation, and highly durable to solve the above problems. Utility Model Content

[0009] This utility model aims to provide prefabricated PC components for buildings, effectively solving the problems of poor connection and positioning, easy loosening, cumbersome installation, and insufficient durability of existing PC components. The specific solution is as follows:

[0010] A prefabricated building PC component includes an upper component and a lower component, with adjacent upper and lower components being installed by bolts;

[0011] The upper component has a first protrusion and a second groove at both ends, and the lower component has a second protrusion and a first groove at its end. The first protrusion and the first groove are matched in shape, and the second protrusion and the second groove are matched in shape.

[0012] The surface of the second protrusion is provided with a plurality of pre-embedded holes, and pre-embedded parts are provided in the pre-embedded holes. The pre-embedded parts include pre-embedded nuts and compression springs. The bottom end of the compression spring is connected to the top end of the pre-embedded nut. The upper surface of the second groove is provided with a through hole. The bolt passes through the through hole, the compression spring and the pre-embedded nut in sequence. As the bolt is tightened, the top end of the compression spring abuts against the lower surface of the second groove.

[0013] Furthermore, the number of pre-embedded holes is 2-4, and they are evenly distributed along the length of the second protrusion. The specific number can be flexibly selected according to the length of the second protrusion and the load-bearing requirements of the component. The center distance between adjacent pre-embedded holes is controlled within the range of 200mm-300mm. This distribution method can evenly distribute the stress of the bolt connection point to the entire protrusion area, avoid component cracking caused by local stress concentration, and at the same time ensure that the connection surfaces of the upper and lower components fit tightly, thereby improving the stability of the overall structure.

[0014] Furthermore, both the upper and lower components are coated with an anti-corrosion coating on their outer surfaces. This effectively prevents concrete carbonation and internal steel reinforcement corrosion, and also provides excellent acid and alkali resistance, making it suitable for complex building environments such as humid and saline-alkali conditions. In addition, the coating surface is smooth and easy to clean, reducing later maintenance costs and extending the service life of the components.

[0015] Furthermore, the compression spring is made of 65Mn spring steel, and its free length is 1.2-1.5 times the depth of the pre-embedded hole. This ensures that the spring can be fully compressed during the bolt tightening process, preventing damage due to over-compression while generating sufficient preload to keep the upper and lower components in a tight fit, thus offsetting gaps caused by vibration, temperature deformation, and other factors.

[0016] Furthermore, the width of the first protrusion is 1 / 3 to 1 / 2 of the width of the second groove. The inner sidewall of the groove effectively limits the protrusion, preventing lateral displacement after engagement.

[0017] Furthermore, the depth of the first groove is equal to the depth of the second groove. This design ensures that when the upper and lower components are joined, the stress-bearing surfaces of the two grooves are at the same horizontal level, guaranteeing the overall structural stress balance and reducing component deformation caused by uneven local stress.

[0018] Beneficial effects:

[0019] 1. Precise positioning: Through the matching structure of "first protrusion-first groove" and "second protrusion-second groove", the pre-positioning of adjacent components is achieved, avoiding splicing offset and reducing adjustment procedures.

[0020] 2. Secure and anti-loosening connection: The compression spring in the embedded part generates a continuous preload after the bolt is tightened, which can offset the gap caused by vibration and temperature deformation and prevent the connection from loosening; at the same time, the interlocking structure of the protrusion and groove forms a "mechanical engagement", which shares the force of the bolt and improves the overall shear resistance.

[0021] 3. Highly efficient installation: No complex on-site processing is required. It can be directly connected with bolts. With the help of a pre-positioned structure, the installation efficiency is improved by more than 30%.

[0022] 4. High adaptability: The elastic buffering effect of the compression spring can adapt to slight settlement or vibration, improving the seismic performance of the building. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the installation between the upper and lower components;

[0024] Figure 2 This is a structural diagram of the lower component;

[0025] Figure 3 This is a structural schematic diagram of the embedded parts;

[0026] Figure 4 This is a schematic diagram of the embedded nut and compression spring in the embedded parts.

[0027] 1. Upper component, 2. Through hole, 3. First protrusion, 4. Second groove, 5. Lower component, 6. Second protrusion, 7. First groove, 8. Embedded part, 9. Embedded nut, 10. Compression spring. Detailed Implementation

[0028] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0029] Example 1: As Figure 1-4 As shown, a prefabricated building PC component is provided. Both the upper component 1 and the lower component 5 are made of C40 precast concrete and coated with an epoxy resin anti-corrosion coating (0.2mm thick) to improve impermeability and corrosion resistance. The first protrusion 3 and the first groove 7, and the second protrusion 6 and the second groove 4 are all right-angled structures, which can achieve rapid fitting and have high interlocking resistance and strong positioning stability after fitting.

[0030] The embedded part 8 is pre-embedded and fixed to the second protrusion 6 during the casting process through the pre-embedded hole. The pre-embedded nut 9 is an M16 high-strength nut, and the compression spring 10 is made of 65Mn spring steel to ensure that sufficient pre-tightening force can be generated after compression.

[0031] Installation process

[0032] S1. Pre-positioning: Align the first protrusion 3 of the upper component 1 with the first groove 7 of the lower component 5, and align the second groove 4 with the second protrusion 6 of the lower component 5. Slowly lower the component vertically and complete the fitting and positioning by guiding the concave and convex structure. At this time, the pre-embedded hole on the second protrusion 6 is coaxially aligned with the through hole 2 of the second groove 4.

[0033] S2. Bolt connection: Pass the high-strength bolts through the through hole 2 and the compression spring 10 in sequence, and screw them into the pre-embedded nut 9;

[0034] S3. Pre-tightening and fixing: Tighten the bolt with a torque wrench. During the process, the compression spring 10 is compressed, and its top end abuts against the lower surface of the second groove 4, generating a continuous elastic force. At this time, the bolt tension and the spring force work together to make the upper and lower components fit tightly together.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A prefabricated construction PC element, characterized by The device includes an upper component and a lower component, which are connected by bolts. Each end of the upper component has a first protrusion and a second groove, and the end of the lower component has a second protrusion and a first groove. The shapes of the first protrusion and the first groove are matched, and the shapes of the second protrusion and the second groove are matched. The surface of the second protrusion has several pre-embedded holes, each containing an embedded part, including a pre-embedded nut and a compression spring. The bottom end of the compression spring is connected to the top end of the pre-embedded nut. The upper surface of the second groove has a through hole, through which the bolt passes sequentially, through the compression spring, and to the pre-embedded nut. As the bolt is tightened, the top end of the compression spring abuts against the lower surface of the second groove.

2. The fabricated building PC member according to claim 1, characterized in that, The number of pre-embedded holes is 2-4, and they are evenly distributed along the length of the second protrusion.

3. A prefabricated building PC component according to claim 1, characterized in that, Both the upper and lower components are coated with an anti-corrosion coating on their outer surfaces.

4. A prefabricated building PC component according to claim 1, characterized in that, The compression spring is made of 65Mn spring steel, and the free length of the compression spring is 1.2-1.5 times the depth of the pre-embedded hole.

5. A prefabricated building PC component according to claim 1, characterized in that, The width of the first protrusion is 1 / 3 to 1 / 2 of the width of the second groove.

6. A prefabricated building PC component according to claim 1, characterized in that, The depth of the first groove is equal to the depth of the second groove.

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