Waterproof split bolt and construction structure applying same

Abstract

The utility model discloses a waterproof split bolt which comprises a screw rod and nuts at the two ends, and the screw rod is a high-strength concrete screw rod. The utility model further discloses a construction structure applying the waterproof split bolt, the construction structure comprises a concrete member and a formwork wrapping the outer side of the concrete member, and the high-strength concrete screw penetrates through the concrete member and the formwork respectively. External threads at the ends of the high-strength concrete screws are connected with the corresponding metal gaskets and the corresponding metal nuts in a matched mode, and the waterproof flange rings are arranged in concrete members. The utility model has the characteristics of good waterproof performance, good durability and low manufacturing cost, and can be widely applied to the technical field of concrete cast-in-place.

Description

Technical Field

[0001] This utility model relates to the field of cast-in-place concrete technology, and in particular to a waterproof tie bolt and a construction structure using the bolt. Background Technology

[0002] During concrete pouring, sufficient rigidity of the formwork is required, often necessitated by the use of waterproof tie rods with a central water-stop ring. Currently, most tie rods are made of steel, with some embedded within the formwork. After construction, the ends can be unscrewed, but must be sealed with waterproof mortar; otherwise, water seepage will occur along the direction of the tie rod. However, existing tie rod products for concrete pouring all have drawbacks. These tie rods consist of a middle section and two ends. After concrete pouring, the middle section remains embedded in the main structure, while the ends are unscrewed and sealed with mortar. However, in actual construction, even with waterproof mortar used for the sealing, these areas remain weak points in the waterproofing process, and water seepage through the unscrewed holes persists. Furthermore, the mortar sealing at the unscrewed ends is difficult to achieve a truly impermeable seal. As water gradually seeps into the tie rod, corrosion occurs, affecting the long-term waterproofing performance of the concrete. This is especially true in cases where the water contains chloride ions, as steel tie rods are prone to corrosion, thus affecting their mechanical properties. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide a waterproof tie bolt and a construction structure for using this bolt. After being poured with high-strength concrete, the concrete and the bolt form a unified whole, resulting in better waterproofing and durability, especially suitable for important waterproofing projects. Furthermore, using high-strength concrete as the construction material for the tie bolt is less expensive than using steel.

[0004] This utility model provides a waterproof tie bolt, including a screw rod and nuts at both ends, wherein the screw rod is a high-strength concrete screw rod.

[0005] In the above technical solution, the high-strength concrete screw is a short-fiber high-strength concrete screw.

[0006] In the above technical solution, the short fiber high-strength concrete screw has multiple longitudinally penetrating fibers evenly distributed in it.

[0007] In the above technical solution, a waterproof flange ring is provided in the middle of the high-strength concrete screw.

[0008] In the above technical solution, the waterproof flange ring is a high-strength concrete flange ring.

[0009] In the above technical solution, the high-strength concrete screw has external threads at both ends that are threaded to the nuts, and the nuts are metal nuts.

[0010] In the above technical solution, a metal washer is provided between the metal nut and the waterproof flange ring.

[0011] In the above technical solution, the outer wall of the high-strength concrete screw is provided with threads that fit tightly with it.

[0012] This utility model also provides a construction structure for using the waterproof tie bolt, including a concrete component and a template covering the outside of the concrete component. The high-strength concrete bolt passes through the concrete component and the template respectively. The external thread at the end of the high-strength concrete bolt is connected to the corresponding metal washer and metal nut. The waterproof flange ring is set in the concrete component.

[0013] The waterproof tie bolt of this utility model and the construction structure using this bolt have the following beneficial effects:

[0014] This invention uses UHPC (high-strength concrete) as the bolt material, allowing for excellent integration with ordinary cast-in-place concrete. Simultaneously, by employing UHPC as the high-strength concrete material and modifying the fiber design, it achieves superior tensile strength. Used as a formwork tie rod in cast-in-place structures, it is directly cast into the concrete, exhibiting excellent overall integrity. This invention primarily targets tie rods used in waterproof concrete construction, applicable to civil engineering and large-scale water conservancy projects. Attached Figure Description

[0015] Figure 1 This is an overall perspective view of the waterproof tie bolt of this utility model;

[0016] Figure 2 This is an overall side elevation view of the waterproof tie bolt of this utility model;

[0017] Figure 3 This is a cross-sectional view of the waterproof tie bolt of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the construction method for using the waterproof tie bolt of this utility model. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.

[0020] See Figures 1 to 2 This utility model relates to a waterproof tie bolt, comprising a threaded rod and nuts at both ends, wherein the threaded rod is a high-strength concrete threaded rod 1. The high-strength concrete threaded rod 1 is a short-fiber high-strength concrete threaded rod 11. The short-fiber high-strength concrete threaded rod 11 contains multiple longitudinally penetrating fibers 12 evenly distributed throughout.

[0021] The high-strength concrete screw 1 is provided with a waterproof flange ring 2 in the middle. In this embodiment, the waterproof flange ring 2 is a high-strength concrete flange ring.

[0022] The high-strength concrete screw 1 has external threads at both ends that are threaded to the nuts, and the nuts are metal nuts 3.

[0023] A metal washer 4 is provided between the metal nut 3 and the waterproof flange ring 2.

[0024] See Figure 3 The high-strength concrete screw 1 has threads 5 on its outer wall that fit tightly with it.

[0025] See Figure 4 The present invention utilizes the construction structure of the waterproof tie bolt, including a concrete component 6 and a template 7 covering the outside of the concrete component 6. The high-strength concrete bolt 1 passes through the concrete component 6 and the template 7 respectively. The external thread at the end of the high-strength concrete bolt 1 is connected to the corresponding metal washer 4 and metal nut 3. The waterproof flange ring 2 is set in the concrete component 6.

[0026] Technical features of this utility model:

[0027] 1) The waterproof tie bolt of this utility model is made of UHPC, i.e., high-strength concrete, or other non-metallic materials, and no metallic materials are used.

[0028] 2) High-strength concrete screw rod 1 uses prestressing.

[0029] Example:

[0030] The size of the high-strength concrete screw 1 is determined based on mechanical calculations. Taking a screw with a diameter of 25mm as an example, the material preparation of the high-strength concrete screw 1 is as follows: high-strength longitudinal through fibers 12 are set, and high-strength short fiber concrete with high shear strength is poured. After it is compacted by vibration and reaches the required strength, threads are cut on a lathe.

[0031] To ensure the feasibility of this technology, software simulation calculations were used. The compressive, tensile, and shear strength indicators all fell within the range of the UHPC test, and a series of technical parameters were obtained, as follows:

[0032] 1) The threaded rod section uses UHPC concrete. The strength and quantity of the longitudinal through-fibers 12 are adjusted according to the stress on the tie rod to achieve a total tensile strength of 15 MPa across the cross-section. With a single 25 mm diameter threaded rod, the standard tensile bearing capacity of a single bolt can reach 7.35 kN. By applying prestress, the bearing capacity can be increased to a total cross-section bearing capacity of 30 MPa, and the standard tensile bearing capacity of a single waterproof tie bolt can reach 14.7 kN.

[0033] 2) The metal nut 3 and metal washer 4 can conform to national standards and be made of steel, as these components are reusable. The high-strength concrete screw 1 is not removed and is cast integrally with the overall structure, possessing natural self-waterproofing capabilities. Especially for structures with seismic resistance levels of P8 and above, the high-strength concrete screw 1 exhibits excellent integrity and durability.

[0034] Comparative example:

[0035] To better understand the specific performance of this utility model, the following comparative examples were made:

[0036] 1) The screw is made of ordinary concrete with steel wire added. This method can achieve the mechanical requirements by increasing the diameter, but the large diameter results in a low safety factor.

[0037] 2) Using cement-based or gypsum-based materials for the screw can slightly increase the tensile strength and may achieve the mechanical effect of a tie rod, but the safety factor is low.

[0038] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0039] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A waterproofed turnbuckle comprising a threaded rod and a nut at each end, characterised in that: The screw is a high-strength concrete screw (1), and the high-strength concrete screw (1) is a short-fiber high-strength concrete screw (11), in which multiple longitudinal through fibers (12) are evenly distributed.

2. The waterproofing turnbuckle according to claim 1, wherein: The high-strength concrete screw (1) is provided with a waterproof flange ring (2) in the middle.

3. The waterproofing turnbuckle of claim 2, wherein: The waterproof flange ring (2) is a high-strength concrete flange ring.

4. The waterproofing turnbuckle of claim 3, wherein: The high-strength concrete screw (1) has external threads at both ends that are threaded to the nuts, and the nuts are metal nuts (3).

5. The waterproofing turnbuckle as defined in claim 4, wherein: A metal washer (4) is provided between the metal nut (3) and the waterproof flange ring (2).

6. The waterproofing turnbuckle as defined in claim 5, wherein: The high-strength concrete screw (1) has threads (5) on its outer wall that fit tightly with it.

7. A construction structure in which the waterproofing double-stud bolt according to any one of claims 1 to 6 is used, comprising a concrete member (6) and a formwork (7) covering the outer side of the concrete member (6), characterized in that: The high-strength concrete screw (1) passes through the concrete component (6) and the template (7) respectively. The external thread at the end of the high-strength concrete screw (1) is connected to the corresponding metal washer (4) and metal nut (3). The waterproof flange ring (2) is set in the concrete component (6).

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