Steel support for foundation pit

Abstract

The utility model discloses a steel support for foundation pits, which comprises an outer steel pipe, an inner steel pipe, pipe clamps and connectors. One end of the inner steel pipe is a first mating end, and one end of the outer steel pipe is a second mating end. The first mating end of the inner steel pipe is provided with a first mounting hole and is coaxially and slidably connected in the second mating end of the outer steel pipe. Long holes are arranged in parallel on the second mating end of the outer steel pipe. The pipe clamp comprises a locking piece and two half pipes. The half pipes are provided with second mounting holes. The two half pipes are locked on the opposite sides of the second mating end of the outer steel pipe through the locking piece. The connector penetrates through the long hole, and the two ends of the connector are respectively locked in the first mounting hole and the second mounting hole. The axial distance by which the half pipe protrudes from the first mating end of the inner steel pipe is W, and the outer diameter of the outer steel pipe is D, and 1.5 < W / D < 2.5. The utility model provides a steel support, and the way of adjusting the length is more flexible, which is beneficial to reducing the construction cost.

Description

Technical Field

[0001] This utility model relates to the field of steel support technology, and in particular to a steel support for foundation pits. Background Technology

[0002] Steel supports are widely used in sites such as foundation pits to support the side walls of the pit and prevent it from collapsing. Existing steel supports are generally composed of several pipe sections spliced ​​together, with adjacent pipe sections connected by flanges. The length of the steel support is adjusted by adjusting the number of pipe sections. However, this method of adjusting the length cannot achieve stepless adjustment and often requires custom-made pipe sections to make the length of the steel support suitable for the foundation pit, which increases construction costs. Utility Model Content

[0003] To address the shortcomings of existing steel support length adjustment methods that are not flexible enough and easily increase construction costs, this utility model proposes a steel support with a more flexible length adjustment method, which is conducive to reducing construction costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A steel support for foundation pits includes an outer steel pipe, an inner steel pipe, a pipe clamp, and connectors. One end of the inner steel pipe is a first mating end, and one end of the outer steel pipe is a second mating end. The first mating end of the inner steel pipe has a first mounting hole and is coaxially and slidably connected to the second mating end of the outer steel pipe. An elongated hole is parallel to the second mating end of the outer steel pipe. The pipe clamp includes a locking element and two half-pipes. Each half-pipe has a second mounting hole. The two half-pipes are locked to opposite sides of the second mating end of the outer steel pipe by the locking element. The connector passes through the elongated hole, and both ends of the connector are locked in the first mounting hole and the second mounting hole, respectively. The axial distance W from the first mating end of the inner steel pipe to the half-pipe is 1.5. The outer diameter D of the outer steel pipe is 1.5. <W / D<2.5。

[0006] With the above settings, after the locking parts and connecting parts are loosened, the length of the steel support can be adjusted infinitely, making the length adjustment more flexible and helping to reduce construction costs. After the locking parts and connecting parts are locked, the pipe clamp can increase the stability of the outer steel pipe and prevent the outer steel pipe from becoming unstable outside the surface.

[0007] Furthermore, the left and right sides of the half tube are integrally formed with outwardly extending flanges, and the locking element is a bolt that passes through the flanges of the two half tubes and locks them in place.

[0008] Furthermore, the wall thickness of the outer steel pipe is smaller than that of the inner steel pipe.

[0009] Furthermore, an elongated hole is provided on the upper and lower sides of the second mating end of the outer steel pipe, and at least two connectors are provided on the upper and lower sides of the first mating end of the inner steel pipe, with the connectors arranged along the elongated holes.

[0010] Furthermore, the connector includes a screw, a first nut, and a second nut. The screw passes through the first mounting hole and the second mounting hole. The first nut is tightened at the inner end of the screw and abuts against the inner wall of the first mating end of the inner steel pipe. The second nut is tightened at the outer end of the screw and abuts against the outer wall of the second mating end of the outer steel pipe.

[0011] The above setup facilitates the assembly of steel supports.

[0012] Furthermore, the steel support also includes a first flange and a second flange. The first flange is fixedly connected to the end of the inner steel pipe away from the outer steel pipe, and the second flange is fixedly connected to the end of the outer steel pipe away from the inner steel pipe.

[0013] The above setup facilitates the installation of steel supports in the foundation pit via the first flange and the second flange.

[0014] Furthermore, both the inner and outer steel pipes are round. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the steel support for an embodiment.

[0016] Figure 2 This is a top view of the steel support in an embodiment.

[0017] Figure 3 for Figure 2 A sectional view of AA. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] like Figures 1 to 3 A steel support for foundation pits includes an outer steel pipe 3, an inner steel pipe 4, a pipe clamp, and a connector 5. One end of the inner steel pipe 4 is a first mating end, and one end of the outer steel pipe 3 is a second mating end. The first mating end of the inner steel pipe 4 is provided with a first mounting hole 6 and is coaxially and slidably connected to the second mating end of the outer steel pipe 3. A long hole 7 is provided parallel to the second mating end of the outer steel pipe 3. The pipe clamp includes a locking element 8 and two half-pipes 9. The half-pipes 9 are provided with second mounting holes 10. The two half-pipes 9 are locked to opposite sides of the second mating end of the outer steel pipe 3 by the locking element 8. The connector 5 passes through the long hole 7, and both ends of the connector 5 are locked in the first mounting hole 6 and the second mounting hole 10, respectively. The axial distance of the half-pipes 9 protruding from the first mating end of the inner steel pipe 4 is W. The outer diameter of the outer steel pipe 3 is D, 1.5. <W / D<2.5。

[0020] With the above settings, after the locking part 8 and the connecting part 5 are loosened, the length of the steel support can be adjusted infinitely, making the length adjustment more flexible and helping to reduce construction costs. After the locking part 8 and the connecting part 5 are locked, the pipe clamp can increase the stability of the outer steel pipe 3 and prevent the outer steel pipe 3 from becoming unstable outside the surface.

[0021] After the connector 5 and locking piece 8 are released, the half-pipe 9 loosens the outer wall of the second mating end of the outer steel pipe 3, allowing the inner steel pipe 4 to be pulled axially inward and outward to adjust the length of the steel support. After adjustment, the connector 5 and locking piece 8 are locked together, the half-pipe 9 fits against the outer wall of the outer steel pipe 3, and the pipe clamp is tightened around the second mating end of the outer steel pipe 3. The connector 5 is locked to the inner steel pipe 4 through the first mounting hole 6, and the connector 5 is locked to the pipe clamp through the second mounting hole 10. That is, the inner steel pipe 4 is locked to the pipe clamp through the connector 5. Finally, the inner steel pipe 4 is locked to the outer steel pipe 3 through the connector 5 and the pipe clamp to fix the length of the steel support. When the steel support is used, it is installed horizontally in the foundation pit. The steel support supports the side wall of the foundation pit and provides axial thrust to prevent the foundation pit from collapsing. Figure 3 Since the inner steel pipe 4 is not fully inserted into the outer steel pipe 3, a portion of the second mating end of the outer steel pipe 3 is supported by the inner steel pipe 4, and this portion of the outer steel pipe 3 will not bend. The other portion of the second mating end of the outer steel pipe 3 is not supported by the inner steel pipe 4, and since this portion is close to the middle of the steel support, it is most prone to out-of-plane instability. One end of the pipe clamp of this application is set outside the first mating end of the inner steel pipe 4, and the other end protrudes outside the first mating end of the inner steel pipe 4 to support the second mating end of the outer steel pipe 3 and prevent the outer steel pipe 3 from experiencing out-of-plane instability.

[0022] As one implementation, the left and right sides of the half tube 9 are integrally formed with outwardly extending flanges 11, and the locking element 8 is set as a bolt. The locking element passes through the flanges of the two half tubes and locks them.

[0023] The half-tube 9 of this application has integrally formed flanges 11 on both the left and right sides. The flanges 11 are provided with third mounting holes. The third mounting holes of the half-tube 9 correspond to the third mounting holes of the other half-tube 9. The bolts pass through the third mounting holes and are locked, so that the two half-tubes 9 hug the outer steel pipe 3.

[0024] As one implementation method, the wall of the outer steel pipe 3 is smaller than the wall of the inner steel pipe 4.

[0025] Specifically, the moment of inertia of the outer steel pipe 3 in this application is basically the same as that of the inner steel pipe 4, so that the bending resistance of the inner steel pipe 4 and the outer steel pipe 3 are similar, thereby making the bending resistance of the two ends of the steel support basically the same and preventing obvious weak points from appearing at the ends of the steel support.

[0026] As one implementation, an elongated hole 7 is provided on the upper and lower sides of the second mating end of the outer steel pipe 3, and at least two connecting pieces 5 are provided on the upper and lower sides of the first mating end of the inner steel pipe 4, with the connecting pieces 5 arranged along the elongated hole 7.

[0027] In this application, the extension direction of the elongated hole 7 is parallel to the axis of the inner steel pipe 4. After the connector 5 and the locking member 8 are released, when the inner steel pipe 4 moves inward and outward, the connector 5 moves along the elongated hole 7. The inner steel pipe 4 drives the pipe clamp to move synchronously through the connector 5. The position of the pipe clamp automatically matches the position of the first mating end of the inner steel pipe 4. There is no need to adjust the position of the pipe clamp separately. After the adjustment is completed, locking the connector 5 and the locking member 8 can fix the length of the steel support.

[0028] In one implementation, the connector 5 includes a screw 51, a first nut 52 and a second nut 53. The screw 51 passes through the first mounting hole 6 and the second mounting hole 10. The first nut 52 is screwed onto the inner end of the screw 51 and abuts against the inner wall of the first mating end of the inner steel pipe 4. The second nut 53 is screwed onto the outer end of the screw 51 and abuts against the outer wall of the second mating end of the outer steel pipe 3.

[0029] The above setup facilitates the assembly of steel supports.

[0030] When assembling the steel support, the first mating end of the inner steel pipe 4 is inserted into the second mating end of the outer steel pipe 3, the screw 51 passes through the first mounting hole 6, the elongated hole 7 and the second mounting hole 10, and then the first nut 52 and the second nut 53 are tightened at both ends of the screw 51 to lock the connecting piece 5.

[0031] As one implementation, the steel support also includes a first flange 12 and a second flange 13. The first flange 12 is fixedly connected to the end of the inner steel pipe 4 away from the outer steel pipe 3, and the second flange 13 is fixedly connected to the end of the outer steel pipe 3 away from the inner steel pipe 4.

[0032] The above setup facilitates the installation of steel supports in the foundation pit via the first flange 12 and the second flange 13.

[0033] As one implementation method, both the inner steel pipe 4 and the outer steel pipe 3 are round pipes.

[0034] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A steel support for foundation pits, characterized in that, The device includes an outer steel pipe, an inner steel pipe, a pipe clamp, and connectors. One end of the inner steel pipe is a first mating end, and one end of the outer steel pipe is a second mating end. The first mating end of the inner steel pipe has a first mounting hole and is coaxially and slidably connected to the second mating end of the outer steel pipe. A parallel elongated hole is provided on the second mating end of the outer steel pipe. The pipe clamp includes a locking element and two half-pipes. Each half-pipe has a second mounting hole. The two half-pipes are locked to opposite sides of the second mating end of the outer steel pipe by the locking element. The connector passes through the elongated hole, and its two ends are respectively locked in the first and second mounting holes. The axial distance W from the first mating end of the inner steel pipe to the half-pipe is 1.

5. The outer diameter D of the outer steel pipe is 1.

5. <W / D<2.5。 2. The steel support for foundation pits according to claim 1, characterized in that, The left and right sides of the half tube are integrally formed with outwardly extending flanges. The locking element is a bolt that passes through the flanges of the two half tubes and locks them in place.

3. The steel support for foundation pits according to claim 1, characterized in that, The wall size of the outer steel pipe is smaller than that of the inner steel pipe.

4. A steel support for foundation pits according to claim 1, characterized in that, The outer steel pipe has an elongated hole on its upper and lower sides at the second mating end, and at least two connectors are provided on its upper and lower sides at the first mating end of the inner steel pipe, with the connectors arranged along the elongated holes.

5. A steel support for foundation pits according to claim 1, characterized in that, The connector includes a screw, a first nut, and a second nut. The screw passes through a first mounting hole and a second mounting hole. The first nut is tightened at the inner end of the screw and abuts against the inner wall of the first mating end of the inner steel pipe. The second nut is tightened at the outer end of the screw and abuts against the outer wall of the second mating end of the outer steel pipe.

6. A steel support for foundation pits according to claim 1, characterized in that, The steel support also includes a first flange and a second flange. The first flange is fixedly connected to the end of the inner steel pipe away from the outer steel pipe, and the second flange is fixedly connected to the end of the outer steel pipe away from the inner steel pipe.

7. A steel support for foundation pits according to claim 1, characterized in that, Both the inner and outer steel pipes are round pipes.

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