A high strength steel strand connection device

Abstract

The application discloses a high-strength steel strand connecting device, which comprises a pre-buried cable, a temporary cable and a steel sleeve, the steel sleeve is internally provided with a lower rubber sleeve at one end and an upper rubber sleeve at the other end, a connecting anchor plate is arranged between the lower rubber sleeve and the upper rubber sleeve, the pre-buried cable is sequentially connected with the lower rubber sleeve, the connecting anchor plate and a pre-buried cable end head P anchor, the pre-buried cable end head P anchor is located between the connecting anchor plate and the upper rubber sleeve, the temporary cable is sequentially connected with the upper rubber sleeve, the connecting anchor plate and a temporary cable end head P anchor, and the temporary cable end head P anchor is located between the connecting anchor plate and the lower rubber sleeve. The connecting device has the advantages of simple structure, easy installation, low cost, rubber sleeves arranged at the upper end and the lower end, stress concentration caused by large turning of the temporary cable connection can be avoided, the safety of the prestressed temporary cable connection is guaranteed, and a safe, economical and reasonable solution is provided for the use and popularization of the prestressed temporary cable.

Description

Technical Field

[0001] This invention relates to the field of engineering structure construction technology, and specifically to a temporary prestressed steel strand connection device suitable for engineering construction sites. Background Technology

[0002] Prestressed steel strands are widely used in prestressed concrete structures due to their high strength, low relaxation rate, and relatively economical price. Because of these advantages, prestressed steel strands are often used as temporary cable structures on construction sites for large structures. Compared with temporary cable structures using wire ropes, the tension in temporary cables using prestressed steel strands is easier to control more precisely. In prestressed concrete structures, the connection of prestressed steel bars is mainly achieved through prestressed steel bar connectors. Multi-hole prestressed connectors are generally bulky and inconvenient as temporary cable connection devices. Furthermore, the unit price of single-hole and multi-hole prestressed connectors for permanent structures is generally high. These factors limit the application of prestressed steel strands in temporary cable structures on construction sites. Therefore, researching a low-cost, simple, and reliable prestressed steel strand connection device is of great significance for the adoption of prestressed steel strands as temporary cables. Summary of the Invention

[0003] The purpose of this invention is to provide a prestressed connection device that is simple in structure, easy to operate, reliable in connection, and inexpensive, so as to facilitate the use of prestressed steel strands as temporary cables on construction sites.

[0004] To achieve the above objectives, the technical solution of this application is as follows: a high-strength steel strand connection device, comprising a pre-embedded cable, a temporary cable, and a steel sleeve. One end of the steel sleeve is provided with a lower rubber sleeve, and the other end is provided with an upper rubber sleeve. A connecting anchor plate is provided between the lower and upper rubber sleeves. The pre-embedded cable passes sequentially through the lower rubber sleeve and the connecting anchor plate to connect with the pre-embedded cable end P anchor, which is located between the connecting anchor plate and the upper rubber sleeve. The temporary cable passes sequentially through the upper rubber sleeve and the connecting anchor plate to connect with the temporary cable end P anchor, which is located between the connecting anchor plate and the lower rubber sleeve.

[0005] Furthermore, the pre-embedded cable includes two pre-embedded steel strands, which are symmetrically distributed on the same diameter.

[0006] Furthermore, the temporary cable includes two temporary cable strands, which are symmetrically distributed on the same diameter.

[0007] Furthermore, the connecting anchor plate is provided with pre-embedded cable through holes and temporary cable through holes, the centers of which are on the outer periphery of concentric circles.

[0008] Furthermore, one end of the pre-embedded cable protrudes through the pre-embedded cable end P anchor and is exposed outside, and one end of the temporary cable protrudes through the temporary cable end P anchor and is exposed outside.

[0009] Furthermore, the thickness of the upper and lower rubber sleeves is L1, the gap between the rubber sleeve and the connecting anchor plate is L2, and the thickness of the connecting anchor plate is t. Therefore, the total length of the connecting device is L = 2*L1 + 2*L2 + t.

[0010] Furthermore, during the initial tensioning, the two temporary cable strands are used alternately, and the temporary cable strands on the same connecting device have the same sag.

[0011] Furthermore, the temporary cable cutting length is determined based on the spatial coordinates, tension length, and connection length.

[0012] Furthermore, the installation steps for the connecting device are as follows:

[0013] 1) Trim the pre-embedded cables neatly according to the installation angle of the temporary cables;

[0014] 2) Assemble the connecting anchor plate with the temporary cable and the pre-embedded cable;

[0015] 3) After assembly, it is fixed by compression using temporary cable end P anchors and pre-embedded cable end P anchors;

[0016] 4) Perform initial temporary cable tensioning and ensure the connection device angle is straight;

[0017] 5) The upper rubber sleeve is placed on the temporary cable, and the lower rubber sleeve is placed on the pre-embedded cable. Then the lower rubber sleeve, the upper rubber sleeve, and the connecting anchor plate are all fixed by steel sleeves.

[0018] 6) Tension the temporary cable to 50% of its tension. If the connection device has a large deviation, use a small jack to adjust it to ensure it is straight.

[0019] 7) Use large jacks to tension the entire structure into place.

[0020] By employing the above technical solutions, this invention achieves the following technical effects: The connecting device is simple in structure, easy to install, and low in cost. Rubber sleeves are provided at both the upper and lower ends, which can prevent stress concentration caused by excessive deviation in the temporary cable connection, thus ensuring the safety of the prestressed temporary cable connection. It provides a safe, economical, and reasonable solution for the use and promotion of prestressed temporary cables. Attached Figure Description

[0021] Figure 1 A cross-sectional view of a high-strength steel strand connection device;

[0022] Figure 2 AA is a cross-sectional view of a high-strength steel strand connection device;

[0023] Figure 3 BB is a cross-sectional view of a high-strength steel strand connection device;

[0024] Figure 4 CC section view of a high-strength steel strand connection device;

[0025] Figure 5 DD cross-sectional view of the high-strength steel strand connection device;

[0026] Figure 6 This is a cross-sectional view of the high-strength steel strand connection device EE.

[0027] Explanation of the numbers in the diagram: 1. Embedded cable; 2. Lower rubber sleeve; 3. Steel sleeve; 4. Temporary cable end P anchor; 5. Connecting anchor plate; 6. Embedded cable end P anchor; 7. Upper rubber sleeve; 8. Temporary cable. L: Total length of the connecting device; L1: Thickness of the rubber sleeve; L2: Gap between the rubber sleeve and the connecting anchor plate; t: Thickness of the connecting anchor plate. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0029] like Figure 1-6 As shown, this embodiment provides a high-strength steel strand connection device, including pre-embedded cables symmetrically distributed on the same diameter, temporary cables symmetrically distributed on the same diameter, and a steel sleeve. One end of the steel sleeve has a lower rubber sleeve, and the other end has an upper rubber sleeve. A connecting anchor plate is provided between the lower and upper rubber sleeves. The pre-embedded cable passes through the lower rubber sleeve and the connecting anchor plate in sequence and is connected to the pre-embedded cable end P anchor, which is located between the connecting anchor plate and the upper rubber sleeve. The temporary cable passes through the upper rubber sleeve and the connecting anchor plate in sequence and is connected to the temporary cable end P anchor, which is located between the connecting anchor plate and the lower rubber sleeve. The thickness of the upper and lower rubber sleeves is L1, the gap between the rubber sleeves and the connecting anchor plate is L2, and the thickness of the connecting anchor plate is t. Therefore, the total length of the connection device L = 2*L1 + 2*L2 + t.

[0030] The anchoring of temporary cables in the foundation can be achieved using gravity anchors, mountain anchors, pile foundations, etc. During the construction of the aforementioned anchoring structures, pre-embedded cables are connected to the temporary cables. The cutting length of the temporary cables is first determined based on factors such as spatial coordinates, tensioning length, and connection length. The specific implementation method is as follows:

[0031] 1) Trim the pre-embedded cables neatly according to the installation angle of the temporary cables;

[0032] 2) Assemble the connecting anchor plate with the temporary cable and the pre-embedded cable;

[0033] 3) After assembly, it is fixed by compression using temporary cable end P anchors and pre-embedded cable end P anchors;

[0034] 4) Connect the temporary cable to the pre-embedded steel strand and perform initial tensioning of the temporary cable. The tension force can be controlled at 20% of the cable force. During tensioning, the two pre-embedded steel strands should be tensioned alternately, and a special person should be assigned to observe the connection point to ensure that the angle of the connection device is straight and that there is no excessive deflection. The sag of the two pre-embedded steel strands on the same connection device should be consistent.

[0035] 5) The upper rubber sleeve is placed on the temporary cable, and the lower rubber sleeve is placed on the pre-embedded cable. Then the lower rubber sleeve, the upper rubber sleeve, and the connecting anchor plate are all fixed by steel sleeves.

[0036] 6) Use a large jack to tension the temporary cable to 50% of its tension. If the connection device has a large deviation, use a small jack to adjust it to ensure it is straight.

[0037] 7) Use large jacks to tension the entire structure into place.

[0038] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A high-strength steel strand connection device, characterized in that, The system includes a pre-embedded cable, a temporary cable, and a steel sleeve. One end of the steel sleeve has a lower rubber sleeve, and the other end has an upper rubber sleeve. A connecting anchor plate is located between the lower and upper rubber sleeves. The pre-embedded cable passes sequentially through the lower rubber sleeve and the connecting anchor plate to connect to the pre-embedded cable end anchor P, which is located between the connecting anchor plate and the upper rubber sleeve. Similarly, the temporary cable passes sequentially through the upper rubber sleeve and the connecting anchor plate to connect to the temporary cable end anchor P, which is located between the connecting anchor plate and the lower rubber sleeve. The embedded cable includes two embedded steel strands, which are symmetrically distributed on the same diameter. The temporary cable includes two temporary cable strands, which are symmetrically distributed on the same diameter; The connecting anchor plate is provided with pre-embedded cable through holes and temporary cable through holes, the centers of which are on the outer periphery of concentric circles; One end of the pre-embedded cable protrudes through the pre-embedded cable end P anchor and is exposed to the outside; one end of the temporary cable protrudes through the temporary cable end P anchor and is exposed to the outside. The thickness of the upper and lower rubber sleeves is L1, the gap between the rubber sleeve and the connecting anchor plate is L2, and the thickness of the connecting anchor plate is t. Therefore, the total length of the connecting device is L = 2*L1 + 2*L2 + t.

2. The high-strength steel strand connection device according to claim 1, characterized in that, During the initial tensioning, the two temporary cable strands are used alternately, and the temporary cable strands on the same connecting device have the same sag.

3. The high-strength steel strand connection device according to claim 1, characterized in that, The temporary cable cutting length is determined based on the spatial coordinates, tension length, and connection length.

4. The high-strength steel strand connection device according to claim 1, characterized in that, The installation steps for the connecting device are as follows: 1) Trim the embedded cables neatly according to the installation angle of the temporary cables; 2) Assemble the connecting anchor plate with the temporary cable and the pre-embedded cable; 3) After assembly, the cable is fixed by compression using temporary cable end P anchors and pre-embedded cable end P anchors; 4) Perform initial temporary cable tensioning and ensure the connection device angle is straight; 5) The upper rubber sleeve is placed on the temporary cable, and the lower rubber sleeve is placed on the pre-embedded cable. Then the lower rubber sleeve, the upper rubber sleeve, and the connecting anchor plate are all fixed by steel sleeves. 6) Tension the temporary cable to 50% of its tension. If the connection device has a large deviation, use a small jack to adjust it to ensure it is straight. 7) Use large jacks to tension the entire structure into place.

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