Temporary cross-foundation pit support device

Abstract

The application discloses a kind of temporary across foundation pit support device, including cover plate and several support assemblies, each support assembly includes two upper rod bodies and two lower rod bodies, two upper rod bodies and two lower rod bodies are one-to-one and oppositely arranged, upper rod body initial end is provided with upper clamping plate, lower rod body initial end is provided with lower clamping plate, support assembly further includes adjusting assembly, support assembly further includes fixing part, adjusting assembly is connecting block, two first screw holes for the threaded connection of the end of upper rod body are penetrated along the length direction of connecting block on the left side wall of connecting block, two second screw holes for the threaded connection of the end of lower rod body are penetrated along the length direction of connecting block on the right side wall of connecting block, the threaded screw direction in first screw hole is opposite to the threaded screw direction in second screw hole, and a limiting member is provided on the connecting block.The application solves the problem of lacking a convenient disassembly and high connection strength across foundation pit support device in the prior art.

Description

Technical Field

[0001] This invention relates to the field of temporary platform construction technology for foundation pits, specifically a temporary cross-foundation pit support device. Background Technology

[0002] A foundation pit is a pit excavated at the foundation design location according to the foundation elevation and foundation plan dimensions. Excavation pits are common on construction sites, but their construction can hinder material transport and worker movement. Therefore, workers often construct cross-pit devices to support the pits. These devices typically consist of several supporting steel columns erected on the pit floor and wooden or steel plates for worker access. The supporting steel columns support the steel plates, and these columns are connected by fasteners. The installation is complex, but the support strength is low. When workers walk or transport materials, the steel plates can easily slip, tilt, or overturn on the supporting columns. The supporting columns can also become skewed or collapse, leading to the collapse of the entire cross-pit device. Furthermore, the existing cross-pit devices are difficult to assemble and disassemble, significantly impacting project efficiency. After the pit is excavated, workers often lay materials, erect equipment, or directly pour concrete at the bottom, making it difficult for the supporting steel columns to contact the pit floor and thus failing to support the steel plates. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a temporary cross-excavation pit support device, which solves the problem of the lack of a cross-excavation pit support device that is easy to disassemble and has high connection strength in the existing technology.

[0004] To achieve the above objectives, the present invention provides a temporary cross-excavation pit support device, comprising a cover plate for covering the opening of an external excavation pit and a plurality of support components for being placed in the external excavation pit and supporting the cover plate. Each support component includes two upper rods and two lower rods, with the two upper rods corresponding one-to-one with the two lower rods and arranged opposite each other. The starting end of each upper rod is provided with an upper clamping plate for abutting against the inner wall of the left side of the external excavation pit, and the starting end of each lower rod is provided with a lower clamping plate for abutting against the inner wall of the right side of the external excavation pit. The support component also includes a means for adjusting the distance between the upper and lower rods. The adjustment component is adapted to fit the width of the external foundation pit. The support component also includes a fixing component for firmly fixing the cover plate to the upper and lower rods. The adjustment component is a connecting block. There are two first screw holes through the left side wall of the connecting block along the length of the connecting block for threaded connection of the end of the upper rod. There are two second screw holes through the right side wall of the connecting block along the length of the connecting block for threaded connection of the end of the lower rod. The helical direction of the internal thread of the first screw hole is opposite to that of the internal thread of the second screw hole. The connecting block is provided with a limiting component for restricting the axial rotation of the upper and lower rods.

[0005] The advantages of the above technical solution are as follows: The first operator places the upper and lower rods in the external foundation pit. Then, the second operator holds the connecting block in the center of the pit. The operators first thread the end of the upper rod to the first screw hole, and then thread the end of the lower rod to the second screw hole. Next, the upper clamping plate of the upper rod is pressed against the inner left wall of the external foundation pit, leaving a gap between the lower clamping plate of the lower rod and the inner right wall of the external foundation pit. At this point, the first operator can rotate the lower rod, causing the end of the lower rod to gradually rotate outwards towards the second screw hole. Simultaneously, the lower clamping plate on the lower rod gradually moves towards the inner right wall of the external foundation pit. The operator continues to rotate the lower rod until the lower clamping plate is completely pressed against the inner right wall of the external foundation pit. Finally, the operator makes minor adjustments to the upper and lower rods by slightly rotating the upper rod. This design allows the upper and lower clamping plates to be firmly pressed against the inner wall of the pit, thus suspending the connecting block above the pit. This fixes the upper and lower rods near the pit opening. Operators then place the cover plate on the upper and lower rods and secure it using fasteners. This technology facilitates the construction of temporary support devices within the pit, simplifying worker movement, equipment transport, and material handling. The assembly and disassembly process is convenient and quick, saving workers' physical labor, accelerating project progress, and reducing unnecessary formwork or steel waste, thereby reducing costs. Furthermore, the adjustable spacing between the upper and lower rods allows this patented technology to adapt to pits of different widths and lengths, enhancing its practicality and applicability.

[0006] The present invention further comprises: a first limiting hole is provided on the left side wall of the connecting block corresponding to the two second screw holes, the two first limiting holes corresponding to the two second screw holes and connected to each other; a second limiting hole is provided on the right side wall of the connecting block corresponding to the two first screw holes, the two second limiting holes corresponding to the two first screw holes and connected to each other; a first rotating shaft is threaded into the first limiting hole, and a second rotating shaft is threaded into the second limiting hole; the helical direction of the internal thread of the first limiting hole is opposite to the helical direction of the internal thread of the second screw hole, and the helical direction of the internal thread of the second limiting hole is opposite to the helical direction of the internal thread of the first screw hole; a third screw hole for threaded connection of the second rotating shaft is provided on the end face of the upper rod body; a fourth screw hole for threaded connection of the first rotating shaft is provided on the end face of the lower rod body; the helical direction of the internal thread of the third screw hole is opposite to the helical direction of the internal thread of the first screw hole, and the helical direction of the internal thread of the fourth screw hole is opposite to the helical direction of the internal thread of the second screw hole; and both the first rotating shaft and the second rotating shaft are limiting components.

[0007] The advantages of the above technical solution are as follows: When the upper rod needs to be fixed, the operator screws the second shaft into the second limiting hole. At this time, the second shaft will engage with the thread of the second limiting hole and gradually screw into the first threaded hole. When the second shaft is screwed in part, one end of the second shaft will be threaded into the third threaded hole. In the above technology, the helical direction of the internal thread of the first threaded hole is opposite to that of the internal thread of the third threaded hole, and the helical direction of the internal thread of the second limiting hole is opposite to that of the internal thread of the first threaded hole. That is, the helical direction of the internal thread of the third threaded hole is the same as that of the internal thread of the second limiting hole, so that when the upper rod tries to unscrew out of the first threaded hole, it will inevitably be stuck by the second shaft; when the lower rod needs to be fixed, the operator screws the first shaft into... The first limiting hole is now in place. At this point, the first rotating shaft will engage with the threaded part of the first limiting hole and gradually screw into the second threaded hole. When the first rotating shaft has screwed in a portion, one end of the first rotating shaft will be threaded into the fourth threaded hole. In the above technology, the helical direction of the internal thread of the second threaded hole is opposite to that of the internal thread of the fourth threaded hole, and the helical direction of the internal thread of the first limiting hole is opposite to that of the internal thread of the second threaded hole. That is, the helical direction of the internal thread of the fourth threaded hole is the same as that of the internal thread of the first limiting hole, so that when the end of the lower rod tries to screw out of the second threaded hole, it will inevitably be stuck by the first rotating shaft. The above technology ensures that the upper and lower rods will not rotate after being fixed in the pit, thus preventing the fixation from failing and improving the stability and safety of the upper and lower rods in the pit.

[0008] The present invention further comprises: a plurality of first extension holes arranged circumferentially on the outer peripheral wall of the upper rod, and a first extension rod for contacting the bottom surface of the cover plate is threadedly connected to one of the first extension holes; a plurality of second extension holes arranged circumferentially on the outer peripheral wall of the lower rod, and a second extension rod for contacting the bottom surface of the cover plate is threadedly connected to one of the second extension holes; the first extension rod and the second extension rod are arranged on the same horizontal plane.

[0009] The advantages of adopting the above technical solution are as follows: After the cover plate is placed on the upper and lower rods, the operator can insert the first extension rod into one of the first extension holes and the second extension rod into one of the second extension holes. At this time, the first and second extension rods are both on the same horizontal plane and in contact with the bottom surface of the cover plate. This allows the two first extension rods and the two second extension rods to form a support for the cover plate, further improving the stability of the cover plate on the upper and lower rods. This ensures that there will be no shaking or the upper and lower rods will be unable to support the cover plate during worker walking or material transportation, thereby improving the support strength of the upper and lower rods for the cover plate.

[0010] The present invention further comprises: a first mating hole through the cover plate, a second mating hole on the connecting block, and a fixing member including a mating rod, one end of which is threadedly connected to the first mating hole and the other end of which is threadedly connected to the second mating hole.

[0011] The advantage of adopting the above technical solution is that when it is necessary to fix the cover plate, the operator first connects one end of the mating rod to the first mating hole with a thread, and the other end is connected to the second mating hole with a thread, thereby fixing the cover plate on the connecting block, so that the cover plate will not shake or fall off the connecting block during worker walking or material transportation.

[0012] The present invention further comprises: two arc-shaped plates protruding on the bottom surface of the cover plate, the two arc-shaped plates being arranged opposite to each other, and a receiving groove being formed between the two arc-shaped plates for accommodating the upper rod and the lower rod.

[0013] The advantages of adopting the above technical solution are: a receiving groove is formed between the two arc-shaped plates to accommodate the upper and lower rods, which reduces the shaking frequency of the upper and lower rods in the receiving groove, thereby ensuring that the cover plate will not shake or detach from the upper and lower rods, and further improving the stability of the cover plate on the upper and lower rods.

[0014] The invention further includes the following features: both the upper and lower rods are threaded with collars, and the outer wall of the collars is provided with a lifting rope for connecting to an external steel structure.

[0015] The advantages of adopting the above technical solution are: after the upper and lower rods are fixed in the foundation pit, the operator can first rotate the collar so that one end of the hoisting rope is at the top of the collar. Then the operator can pull the hoisting rope and connect it with the external steel structure or formwork frame, which improves the stability and safety of the upper and lower rods in the foundation pit. If the upper or lower rod falls off from the foundation pit opening, the connecting block will also be pulled by the hoisting rope and suspended at the foundation pit opening, thus ensuring that the cover plate will not fall into the foundation pit. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the state used in this invention;

[0017] Figure 2 This is a three-dimensional view of the bottom surface of the present invention;

[0018] Figure 3 for Figure 2 3D view after removing the connecting blocks;

[0019] Figure 4 An exploded 3D view showing the connection relationship between the upper rod, lower rod, and connecting block. Detailed Implementation

[0020] This invention provides a temporary cross-excavation pit support device, comprising a cover plate 1 for covering the opening of an external excavation pit and several support components for placing in the external excavation pit and supporting the cover plate 1. Each support component includes two upper rods 2 and two lower rods 3, with the two upper rods 2 and two lower rods 3 corresponding one-to-one and arranged opposite each other. The starting end of each upper rod 2 is provided with an upper clamping plate 21 for abutting against the inner wall of the left side of the external excavation pit, and the starting end of each lower rod 3 is provided with a lower clamping plate 31 for abutting against the inner wall of the right side of the external excavation pit. The support component also includes an adjustment component for adjusting the distance between the upper rods 2 and the lower rods 3 to adapt to the width of the external excavation pit. The support component also includes a component for securely fixing the cover plate 1 to the upper rods 2 and the lower rods 3. The fixing component on the rod 3, the adjusting component is the connecting block 4. Two first screw holes 22, extending along the length of the connecting block 4 on its left side wall, are for threaded connection to the end of the upper rod 2. Two second screw holes 33, extending along the length of the connecting block 4 on its right side wall, are for threaded connection to the end of the lower rod 3. The helical direction of the internal threads in the first screw holes 22 is opposite to that in the second screw holes 33. The connecting block 4 is provided with a limiting component to restrict the axial rotation of the upper rod 2 and the lower rod 3. First limiting holes 41 are provided on the left side wall of the connecting block 4 corresponding to the positions of the two second screw holes 33. The two first limiting holes 41 correspond one-to-one with the two second screw holes 33 and are connected. On the right side wall of block 4, a second limiting hole 42 is provided at the position corresponding to the two first screw holes 22. The two second limiting holes 42 correspond one-to-one with the two first screw holes 22 and are connected. The first limiting hole 41 is internally threaded to a first rotating shaft 411, and the second limiting hole 42 is internally threaded to a second rotating shaft 421. The helical direction of the internal thread of the first limiting hole 41 is opposite to the helical direction of the internal thread of the second screw hole 33, and the helical direction of the internal thread of the second limiting hole 42 is opposite to the helical direction of the internal thread of the first screw hole 22. A third screw hole 23 is provided on the end face of the upper rod 2 for threaded connection of the second rotating shaft 421, and a fourth screw hole 34 is provided on the end face of the lower rod 3 for threaded connection of the first rotating shaft 411. The internal thread of the third screw hole 23 is arranged in the opposite direction to the internal thread of the first screw hole 22, and the internal thread of the fourth screw hole 34 is arranged in the opposite direction to the internal thread of the second screw hole 33. The first rotating shaft 411 and the second rotating shaft 421 are both limiting components. The outer peripheral wall of the upper rod body 2 has a plurality of first extension holes 24 arranged circumferentially. One of the first extension holes 24 is threadedly connected to a first extension rod 241 for contacting the bottom surface of the cover plate 1. The outer peripheral wall of the lower rod body 3 has a plurality of second extension holes 35 arranged circumferentially. One of the second extension holes 35 is threadedly connected to a second extension rod 351 for contacting the bottom surface of the cover plate 1.The first extension rod 241 and the second extension rod 351 are arranged on the same horizontal plane. A first mating hole 11 is provided through the cover plate 1, and a second mating hole 12 is provided on the connecting block 4. The fixing component includes a mating rod 13, one end of which is threadedly connected to the first mating hole 11, and the other end is threadedly connected to the second mating hole 12. Two arc-shaped plates 14 protrude from the bottom surface of the cover plate 1, and the two arc-shaped plates 14 are arranged opposite each other, forming a receiving groove between the two arc-shaped plates 14 for accommodating the upper rod body 2 and the lower rod body 3. Both the upper rod body 2 and the lower rod body 3 are threadedly connected to collars 15, and a lifting rope 151 for connecting to an external steel structure is provided on the outer wall of the collar 15.

[0021] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A temporary cross-excavation pit support device, characterized in that: The system includes a cover plate for covering the opening of an external foundation pit and several support assemblies for placing the cover plate in the pit and supporting it. Each support assembly includes two upper rods and two lower rods, with each upper rod corresponding to and opposite to the lower rod. Each upper rod has an upper clamping plate at its starting end for abutting against the inner left wall of the external foundation pit, and each lower rod has a lower clamping plate at its starting end for abutting against the inner right wall of the external foundation pit. The support assembly also includes an adjustment component for adjusting the distance between the upper and lower rods to fit the width of the external foundation pit. The support assembly further includes a fixing component for securely fixing the cover plate to the upper and lower rods. The adjustment component is a connecting block. Two first threaded holes are threaded through the left side wall of the connecting block along its length for threaded connection of the ends of the upper rods, and two second threaded holes are threaded through the right side wall of the connecting block along its length for threaded connection of the ends of the lower rods. The helical directions of the internal threads in the first and second threaded holes are opposite. The connecting block has a mechanism for limiting the movement of the upper rods and lower rods. The lower rod body is a limiting component for axial rotation. On the left side wall of the connecting block, corresponding to the two second screw holes, there are first limiting holes, each corresponding to and connected to the two second screw holes. On the right side wall of the connecting block, corresponding to the two first screw holes, there are second limiting holes, each corresponding to and connected to the two first screw holes. A first rotating shaft is threaded into the first limiting hole, and a second rotating shaft is threaded into the second limiting hole. The helical direction of the internal threads in the first limiting hole and the second screw hole is opposite in direction. A third screw hole for threaded connection to the second rotating shaft is provided on the end face of the upper rod body, and a fourth screw hole for threaded connection to the first rotating shaft is provided on the end face of the lower rod body. The helical direction of the internal threads in the third and fourth screw holes is opposite in direction. Both the first and second rotating shafts are limiting components.

2. A temporary cross-excavation pit support device according to claim 1, characterized in that: The upper rod has a plurality of first extension holes arranged circumferentially on its outer peripheral wall. A first extension rod for contacting the bottom surface of the cover plate is threaded onto one of the first extension holes. The lower rod has a plurality of second extension holes arranged circumferentially on its outer peripheral wall. A second extension rod for contacting the bottom surface of the cover plate is threaded onto one of the second extension holes. The first extension rod and the second extension rod are arranged on the same horizontal plane.

3. A temporary cross-excavation pit support device according to claim 1, characterized in that: The cover plate has a first mating hole, the connecting block has a second mating hole, and the fixing member includes a mating rod, one end of which is threaded to the first mating hole and the other end of which is threaded to the second mating hole.

4. A temporary cross-excavation pit support device according to claim 1, characterized in that: Two arc-shaped plates protrude from the bottom surface of the cover plate. The two arc-shaped plates are arranged opposite each other, and a receiving groove is formed between the two arc-shaped plates to accommodate the upper rod and the lower rod.

5. A temporary cross-excavation pit support device according to claim 1, characterized in that: Both the upper and lower rods are threaded with collars, and the outer wall of the collars is provided with a lifting rope for connecting to the external steel structure.

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