Telescopic steel bar connecting joint

Abstract

The utility model discloses a telescopic reinforcing steel bar connecting node which comprises a first sleeve, a first reinforcing steel bar and a second reinforcing steel bar, the first reinforcing steel bar is in sliding connection with the first sleeve through a second sleeve, the second reinforcing steel bar is fixedly connected with the first sleeve or is in sliding connection with the first sleeve through another second sleeve, and a cavity is formed in the first sleeve. One or two second sleeves are installed in the cavity in a clearance fit mode, the axial length of the cavity is larger than that of the one or two second sleeves, and limiting mechanisms are arranged at the two ends of the cavity respectively. According to the steel bar connecting joint, two reinforced concrete members located on the two sides of a preset expansion joint can be connected, the two reinforced concrete members are allowed to move within a certain range, and the mobility of a reinforced concrete structure is improved; the method is particularly suitable for reinforced concrete structures with large deformation requirements such as underground gas storage chamber linings, buildings, bridges and tunnel structures with expansion joints in advance, and provides safety guarantee for deformation of the reinforced concrete structures within a limited range.

Description

TECHNICAL FIELD

[0001] The utility model relates to a connecting joint for reinforced concrete structure, in particular to a telescopic reinforced connecting joint which can be widely applied to reinforced concrete with great deformation requirement, especially suitable for underground gas storage chamber lining structure and also can be used in engineering projects with displacement and deformation requirement such as building, bridge and tunnel structure. BACKGROUND

[0002] Compressed air energy storage is a new type of energy storage technology, and the pressure of compressed air can reach more than 10MPa. In order to ensure the safety of the gas storage chamber, most of the projects place the gas storage chamber underground, relying on the rock mass to bear the pressure of compressed air in the gas storage chamber. However, the deformation capacity of the traditional reinforced concrete lining structure is limited, and it cannot effectively transfer most of the load to the surrounding rock, but only bears it by itself. If it wants to bear more air pressure, it needs to constantly strengthen the lining structure, which greatly increases the cost. In order to make full use of the bearing capacity of the surrounding rock of the chamber, make the lining structure more efficiently transfer the load, reduce the bearing proportion of the lining structure, and reduce the construction cost, the best solution is to make the lining structure can be limited to "expand" deformation when the storage pressure increases, and transfer the pressure to the surrounding rock. When the storage pressure decreases, the lining structure can also restore to its original state and maintain the supporting property. In addition to the gas storage chamber, expansion joints will inevitably be left during the construction process of buildings, bridges and tunnels. Its role is to adjust the expansion and contraction of the structure under the action of load, temperature change or concrete shrinkage, and prevent the reinforced concrete structure from being damaged by excessive tension.

[0003] The reinforced connecting joint is the key connecting structure of the reinforced concrete structure. The purpose and function of the commonly used reinforced connecting joint whether it is a binding type connection or a welding type connection is to fix the steel bars of the two end lining structures as a whole, and the fixed steel bars are not allowed to have large relative movement or displacement. In order to increase the structural coordination and deformation of the gas storage chamber, the general method is to disconnect part of the position of the steel bar connection to allow the lining structure to crack freely. This not only reduces the integrity of the lining structure, but also makes the position and size of the cracks in the lining structure uncontrollable.

[0004] Therefore, we design a new type of displaceable reinforced connecting joint to solve the limitations of the traditional connecting joint and provide the possibility for active deformation of the underground chamber. Utility model content

[0005] The utility model wants to solve the technical problem of prior art, provide a telescopic reinforcing steel bar connecting node, can realize the connection between two reinforced concrete components located at both sides of the preset expansion joint, allow two reinforced concrete components to move within a certain range, improve the movability of reinforced concrete structure, especially suitable for the reinforced concrete structure of underground gas storage chamber lining, building, bridge, tunnel structure and other large deformation requirements, provide safety guarantee for the deformation of reinforced concrete structure within a limited range.

[0006] The utility model adopts the technical scheme that solves the above technical problem: a telescopic reinforcing steel bar connecting node, including first sleeve, first reinforcing steel bar and second reinforcing steel bar, first reinforcing steel bar with first sleeve is connected through a second sleeve sliding, second reinforcing steel bar with first sleeve fixed connection or through another second sleeve sliding connection, first sleeve is equipped with cavity, one or two second sleeve is installed in the clearance fit of cavity, the axial length of cavity is greater than the axial length of one or two second sleeve, both ends of cavity are equipped with the limiting mechanism for limiting the axial displacement of one or two second sleeve.

[0007] The utility model reinforcing steel bar connecting node can realize the connection between two reinforced concrete components located at both sides of the preset expansion joint, allow two reinforced concrete components to move within a certain range, improve the movability of reinforced concrete structure, especially suitable for the reinforced concrete structure of underground gas storage chamber lining, building, bridge, tunnel structure and other large deformation requirements, provide safety guarantee for the deformation of reinforced concrete structure within a limited range.

[0008] The utility model reinforcing steel bar connecting node provides the possibility for the active deformation of underground chamber, reduces unpredictable crack damage, guarantees the safety and reliability of chamber, and guarantees the relatively low cost.The reinforcing steel bar connecting node can realize the expansion joint setting function, improve the integrity of structure, meet the expansion and shrinkage requirements of building and structure, guarantee the change range of expansion joint controllable, and facilitate construction.

[0009] The utility model discloses a steel bar connecting joint, which comprises a first sleeve, a second sleeve, a first steel bar, a second steel bar and a limiting mechanism.

[0010] The limiting mechanism limits the relative movement stroke of the first steel bar and the second steel bar and provides reliable movement space for the second sleeve, thereby ensuring the reliability of the expansion and contraction of the steel bar connecting joint.

[0011] Preferably, the outer surface of the cavity is smooth, the inner surface of each second sleeve is provided with internal threads, and the outer surface of each second sleeve is smooth. One end of the first steel bar is threadedly connected with one second sleeve, and one end of the second steel bar is fixedly connected with the first sleeve or threadedly connected with another second sleeve. The first steel bar and the second steel bar are connected through the threaded connection mode, and the structure is simple and convenient to construct.

[0012] Preferably, the limiting mechanism comprises a third sleeve and a fourth sleeve. One end of the third sleeve is threadedly connected with one end of the first sleeve. One end of the first steel bar passes through the third sleeve and is threadedly connected with one second sleeve. The fourth sleeve is threadedly connected with the other end of the first sleeve or is integrally arranged on the other end of the first sleeve. One end of the second steel bar is threadedly connected with the fourth sleeve or passes through the fourth sleeve and is threadedly connected with another second sleeve.

[0013] Preferably, one end of the third sleeve and one end of the fourth sleeve that is threadedly connected with the first sleeve are respectively provided with external hexagonal parts, so as to facilitate the construction personnel to turn the third sleeve or the fourth sleeve by means of a wrench or the like.

[0014] As preferred, the limiting mechanism comprises a plurality of first high-strength bolts and a plurality of second high-strength bolts threadedly connected with the first sleeve, the plurality of first high-strength bolts are arranged along the circumference of one end of the first sleeve, the end of each first high-strength bolt extends into the inside of the first sleeve, the inner end faces of the plurality of first high-strength bolts enclose a first channel, the plurality of second high-strength bolts are arranged along the circumference of the other end of the first sleeve, the end of each second high-strength bolt extends into the inside of the first sleeve, the inner end faces of the plurality of second high-strength bolts enclose a second channel, one end of the first steel bar passes through the first channel and is threadedly connected with one second sleeve, and one end of the second steel bar passes through the second channel and is threadedly connected with another second sleeve. The plurality of first high-strength bolts and the plurality of second high-strength bolts are used as the limiting mechanism, the diameters of the first channel and the second channel are conveniently adjusted to meet the fitting requirements of first steel bars and second steel bars of different thicknesses, meanwhile, the plurality of first high-strength bolts and the plurality of second high-strength bolts axially limit the second sleeve, and the structure is simple.

[0015] Compared with the prior art, the steel bar connecting joint has the following advantages: the steel bar connecting joint can realize the connection between two steel reinforced concrete components located on both sides of a preset expansion joint, allows the two steel reinforced concrete components to move within a certain range, improves the movability of the steel reinforced concrete structure, is especially suitable for steel reinforced concrete structures such as underground gas storage cavern linings, buildings, bridges, tunnel structures and the like which have a large deformation requirement, and provides a safety guarantee for the deformation of the steel reinforced concrete structure within a limited range. During the compression or tension of the two steel reinforced concrete components, the deformation of the two steel reinforced concrete components is mainly contributed by the preset expansion joint and the steel bar connecting joint, so that the steel reinforced concrete structure can be effectively prevented from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural connection schematic view of the steel bar connecting joint in Embodiment 1.

[0017] Figure 2 It is an exploded view of the main structure of the steel bar connecting joint in Embodiment 1.

[0018] Figure 3 It is a structural connection schematic view of the steel bar connecting joint in Embodiment 2.

[0019] Figure 4 It is an exploded view of the main structure of the steel bar connecting joint in Embodiment 2.

[0020] Figure 5 It is a structural connection schematic view of the steel bar connecting joint in Embodiment 3.

[0021] Figure 6A main structure exploded view of the reinforcing steel bar connecting joint in Example 1;

[0022] Figure 7 A structure connecting schematic view of the reinforcing steel bar connecting joint in Example 4;

[0023] Figure 8 A main structure exploded view of the reinforcing steel bar connecting joint in Example 4;

[0024] Figure 9 A post-construction effect schematic view of the reinforcing steel bar connecting joint in Example 1-Example 4 (in a closed state of the expansion joint);

[0025] Specific reference signs in the drawings are as follows:

[0026] 1-first sleeve, 2-second sleeve, 3-third sleeve, 4-fourth sleeve, 5-first reinforcing steel bar, 6-second reinforcing steel bar, 7-cavity, 8-external hex portion, 9-first high-strength bolt, 10-second high-strength bolt, 11-first channel, 12-second channel, 13-expansion joint, 14-reinforced concrete lining. DETAILED DESCRIPTION

[0027] The utility model will be described in further detail below in combination with the drawings.

[0028] Example 1: a scalable reinforcing steel bar connecting joint, as shown in Figure 1 and Figure 2 , comprising a first sleeve 1, a first reinforcing steel bar 5 and a second reinforcing steel bar 6, the first reinforcing steel bar 5 is slidably connected with the first sleeve 1 through a second sleeve 2, the inner surface of the second sleeve 2 is provided with internal threads, and the outer surface is smooth, the first sleeve 1 is provided with a cavity 7, the outer surface of the cavity 7 is smooth, the second sleeve 2 is installed in the cavity 7 in clearance fit, the axial length of the cavity 7 is greater than the axial length of the second sleeve 2, the two ends of the cavity 7 are respectively provided with limiting mechanisms for limiting the axial displacement of the second sleeve 2, the limiting mechanisms comprise a third sleeve 3 and a fourth sleeve 4, the third sleeve 3 is threadedly connected with one end of the first sleeve 1, one end of the first reinforcing steel bar 5 passes through the third sleeve 3 and is threadedly connected with the second sleeve 2, the fourth sleeve 4 is threadedly connected with the other end of the first sleeve 1, and one end of the second reinforcing steel bar 6 is threadedly connected with the fourth sleeve 4. The one end of the third sleeve 3 and the one end of the fourth sleeve 4 are respectively provided with external hex portions 8.

[0029] Example 2: a scalable reinforcing steel bar connecting joint, as shown in Figure 3 and Figure 4As shown, including the first sleeve 1, the first reinforcing bar 5 and the second reinforcing bar 6, the first reinforcing bar 5 is connected with the first sleeve 1 through a second sleeve 2, the second reinforcing bar 6 is connected with the first sleeve 1 through another second sleeve 2, the inner surface of each second sleeve 2 is provided with internal thread, the outer surface is smooth, the first sleeve 1 is provided with a cavity 7, the outer surface of the cavity 7 is smooth, two second sleeves 2 are installed in the cavity 7 in clearance fit, the axial length of the cavity 7 is greater than the axial length of the two second sleeves 2, the two ends of the cavity 7 are respectively provided with limiting mechanisms for limiting the axial displacement of the two second sleeves 2, the limiting mechanisms include a third sleeve 3 and a fourth sleeve 4, the third sleeve 3 is threadedly connected with one end of the first sleeve 1, one end of the first reinforcing bar 5 passes through the third sleeve 3 and is threadedly connected with one second sleeve 2, the fourth sleeve 4 is threadedly connected with the other end of the first sleeve 1, one end of the second reinforcing bar 6 passes through the fourth sleeve 4 and is threadedly connected with the other second sleeve 2. One end of the third sleeve 3 and one end of the fourth sleeve 4 are respectively provided with an outer hexagonal part 8.

[0030] Example 3: A telescopic reinforcing bar connecting node, as shown in Figure 5 and Figure 6 ( Figure 6 The first sleeve is a perspective view) shown, including the first sleeve 1, the first reinforcing bar 5 and the second reinforcing bar 6, the first reinforcing bar 5 is connected with the first sleeve 1 through a second sleeve 2, the inner surface of the second sleeve 2 is provided with internal thread, the outer surface is smooth, the first sleeve 1 is provided with a cavity 7, the outer surface of the cavity 7 is smooth, the second sleeve 2 is installed in the cavity 7 in clearance fit, the axial length of the cavity 7 is greater than the axial length of the second sleeve 2, the two ends of the cavity 7 are respectively provided with limiting mechanisms for limiting the axial displacement of the second sleeve 2, the limiting mechanisms include a third sleeve 3 and a fourth sleeve 4, the third sleeve 3 is threadedly connected with one end of the first sleeve 1, one end of the first reinforcing bar 5 passes through the third sleeve 3 and is threadedly connected with the second sleeve 2, the fourth sleeve 4 is integrally provided with the other end of the first sleeve 1, one end of the second reinforcing bar 6 is threadedly connected with the fourth sleeve 4. One end of the third sleeve 3 is provided with an outer hexagonal part 8.

[0031] Example 4: A telescopic reinforcing bar connecting node, as shown in Figure 7 and Figure 8As shown, it comprises a first sleeve 1, a first reinforcing bar 5 and a second reinforcing bar 6, the first reinforcing bar 5 is slidably connected with the first sleeve 1 through a second sleeve 2, the second reinforcing bar 6 is slidably connected with the first sleeve 1 through another second sleeve 2, the inner surface of each second sleeve 2 is provided with internal threads, the outer surface is smooth, the first sleeve 1 is provided with a cavity 7, the outer surface of the cavity 7 is smooth, two second sleeves 2 are installed in the cavity 7 in clearance fit, the axial length of the cavity 7 is greater than the axial length of the two second sleeves 2, the two ends of the cavity 7 are respectively provided with limiting mechanisms for limiting the axial displacement of the two second sleeves 2, the limiting mechanisms comprise a plurality of first high-strength bolts 9 and a plurality of second high-strength bolts 10 which are threadedly connected with the first sleeve 1, the plurality of first high-strength bolts 9 are arranged along the circumference of one end of the first sleeve 1, the end of each first high-strength bolt 9 extends into the inner side of the first sleeve 1, the inner end faces of the plurality of first high-strength bolts 9 enclose a first channel 11, the plurality of second high-strength bolts 10 are arranged along the circumference of the other end of the first sleeve 1, the end of each second high-strength bolt 10 extends into the inner side of the first sleeve 1, the inner end faces of the plurality of second high-strength bolts 10 enclose a second channel 12, one end of the first reinforcing bar 5 passes through the first channel 11 and is threadedly connected with one second sleeve 2, one end of the second reinforcing bar 6 passes through the second channel 12 and is threadedly connected with the other second sleeve 2.

[0032] The above-described telescopic reinforcing bar connecting joint can realize the connection between two reinforced concrete components located on both sides of a pre-set expansion joint, allows the two reinforced concrete components to move within a certain range, and improves the movability of the reinforced concrete structure.

[0033] Taking the underground gas storage chamber lining pre-provided with expansion joints as an application example, the post-construction effect diagram of the above-described telescopic reinforcing bar connecting joint is shown in Figure 9 . As shown in Figure 9 , the cross section of the underground gas storage chamber lining is circular, the longitudinal direction of the underground gas storage chamber lining is pre-provided with a plurality of expansion joints 13, and the two pieces of reinforced concrete lining 14 located on both sides of each expansion joint 13 are connected through two above-described telescopic reinforcing bar connecting joints. In this application example, the first reinforcing bar 5 and the second reinforcing bar 6 are the main bars embedded in the underground gas storage chamber lining. During the gas storage process of the underground gas storage chamber, the internal pressure of the underground gas storage chamber gradually rises, the two pieces of reinforced concrete lining 14 are in tension, the expansion joint 13 gradually opens, the first reinforcing bar 5 and the second reinforcing bar 6 slide away from each other, and the reinforcing bar connecting joint is stretched; during the gas release process of the underground gas storage chamber, the internal pressure of the underground gas storage chamber gradually decreases, the two pieces of reinforced concrete lining 14 are in compression, the expansion joint 13 gradually closes Figure 9When the expansion joint 13 is in the closed state, the first steel bar 5 and the second steel bar 6 slide towards each other, and the steel bar connecting joint is compressed. During the compression or tension of the two reinforced concrete linings 14, the deformation of the two reinforced concrete linings 14 is mainly contributed by the preset expansion joint 13 and the steel bar connecting joint, so that the destruction of the underground gas storage chamber lining can be effectively avoided.

Claims

1. A telescopic reinforcing bar connection node, characterized by, The utility model provides a reinforced sleeve, which comprises a first sleeve, a first reinforcing bar and a second reinforcing bar, the first reinforcing bar is connected with the first sleeve through a second sleeve, the second reinforcing bar is fixedly connected with the first sleeve or connected with the first sleeve through another second sleeve, the first sleeve is internally provided with a cavity, one or two second sleeves are gap-fitted in the cavity, the axial length of the cavity is greater than the axial length of the one or two second sleeves, and the two ends of the cavity are respectively provided with limiting mechanisms for limiting the axial displacement of the one or two second sleeves.

2. A telescopic reinforcing bar connection node according to claim 1, wherein, The outer surface of the cavity is smooth, the inner surface of each second sleeve is provided with internal threads, and the outer surface of each second sleeve is smooth, one end of the first reinforcing bar is threadedly connected with one second sleeve, and one end of the second reinforcing bar is fixedly connected with the first sleeve or threadedly connected with another second sleeve.

3. A telescopic reinforcing bar connection node according to claim 2, wherein, The limiting mechanisms comprise third sleeves and fourth sleeves, one end of each third sleeve is threadedly connected with one end of the first sleeve, one end of the first reinforcing bar passes through one third sleeve and is threadedly connected with one second sleeve, one end of each fourth sleeve is threadedly connected with the other end of the first sleeve or integrally arranged with the other end of the first sleeve, and one end of the second reinforcing bar is threadedly connected with one fourth sleeve or passes through one fourth sleeve and is threadedly connected with another second sleeve.

4. A telescopic reinforcing bar connection node according to claim 3, wherein, One end of each third sleeve and one end of each fourth sleeve that is threadedly connected with the first sleeve are respectively provided with external hexagonal portions.

5. A telescopic reinforcing bar connection node according to claim 2, wherein, The limiting mechanisms comprise a plurality of first high-strength bolts and a plurality of second high-strength bolts that are threadedly connected with the first sleeve, the plurality of first high-strength bolts are arranged along the circumference of one end of the first sleeve at intervals, the end portions of each first high-strength bolt extend into the inside of the first sleeve, the inner end faces of the plurality of first high-strength bolts enclose a first channel, the plurality of second high-strength bolts are arranged along the circumference of the other end of the first sleeve at intervals, the end portions of each second high-strength bolt extend into the inside of the first sleeve, the inner end faces of the plurality of second high-strength bolts enclose a second channel, one end of the first reinforcing bar passes through the first channel and is threadedly connected with one second sleeve, and one end of the second reinforcing bar passes through the second channel and is threadedly connected with another second sleeve.

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