Foundation pit supporting beam and supporting structure thereof

Abstract

The invention relates to the technical field of foundation pit supporting, in particular to a foundation pit supporting beam and a supporting structure thereof, the foundation pit supporting beam comprises a supporting beam body, the supporting beam body is internally provided with a hollow cavity, the foundation pit supporting beam further comprises two hollow movable beams, and the two hollow movable beams are movably inserted into the two ends of the supporting beam body; the telescopic adjusting mechanism is arranged in the hollow cavity and used for driving the two hollow movable beams to stretch out and draw back; the two fixing shells are fixed to the outer ends of the two hollow movable beams respectively, an unfolding and folding mechanism is arranged in each fixing shell, and a plurality of end plates connected with the unfolding and folding mechanisms are arranged on the periphery of each fixing shell at intervals in the circumferential direction. By arranging the hollow movable beam and the telescopic adjusting mechanism, flexible adjustment can be conducted according to the actual width of the foundation pit on the basis that the main body structure is not changed, cutting or splicing is not needed, the construction process is greatly simplified, the construction process is faster, and the construction period is greatly shortened.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, and in particular to a foundation pit support beam and a support structure thereof. Background Art

[0002] The foundation pit support beam refers to a structure used during the foundation pit excavation process to protect the foundation pit slope and the surrounding environment. It supports the soil around the foundation pit to prevent soil collapse inside the foundation pit and settlement of soil outside the foundation pit, thereby maintaining the stability of the foundation pit.

[0003] In traditional foundation pit support structures, the length of the foundation pit support beam is usually fixed. During the construction process, this design method often needs to be cut or spliced ​​according to the actual width of the foundation pit to meet the needs of different foundation pit sizes. However, this practice not only increases the difficulty of construction, but also may cause material waste and increase construction costs. To this end, we propose a foundation pit support beam and its support structure to effectively solve the above drawbacks. Summary of the invention

[0004] The object of the present invention is to provide a foundation pit support beam and a supporting structure thereof, so as to solve the problem that the length of the foundation pit support beam cannot be changed as mentioned in the above background technology.

[0005] The present invention is achieved through the following technical solutions: a foundation pit support beam, comprising a support beam body, wherein a hollow cavity is provided inside the support beam body, and further comprising:

[0006] Two hollow movable beams, which are movably inserted at both ends of the supporting beam body;

[0007] A telescopic adjustment mechanism, which is arranged in the hollow cavity and is used to drive the two hollow movable beams to telescope;

[0008] Two fixed shells are respectively fixed to the outer ends of the two hollow movable beams, an expansion and retraction mechanism is arranged in each fixed shell, and a plurality of end plates connected to the expansion and retraction mechanism are arranged at intervals along the circumferential direction on the periphery of each fixed shell.

[0009] Optionally, the telescopic adjustment mechanism includes a bracket fixed in the hollow cavity, which is rotatably connected to a bidirectional screw arranged along the axis of the support beam body through a bearing and a shaft seat, and threaded grooves that spirally cooperate with both ends of the bidirectional screw are respectively opened in the two hollow movable beams.

[0010] The telescopic adjustment mechanism also includes a guide convex rib fixed to the inner end of each hollow movable beam, and a guide groove is arranged in the hollow cavity along the axial direction of the support beam body and matched with each guide convex rib one by one.

[0011] Optionally, a handle is rotatably connected to the outside of the support beam body via a rotating shaft, a first bevel gear located in the hollow cavity is fixed on the rotating shaft, and a second bevel gear meshing with the first bevel gear is fixed on the bidirectional screw.

[0012] Optionally, the end plate is an arc-shaped structure, and a plurality of fixing holes are provided on the end plate.

[0013] Optionally, the outer contour of the fixing shell is disc-shaped, and when the end plate is in a retracted state, the end plate and the fixing shell are concentric.

[0014] Optionally, the unfolding and retracting mechanism comprises a movable rod fixed to each end plate, each movable rod is movably inserted into the fixed shell, and a connecting column is fixed at the inner end of each movable rod;

[0015] A connecting shaft is rotatably connected in the fixed shell through a bearing and a shaft seat. A rotating disk located in the fixed shell is fixed at the end of the connecting shaft. The rotating disk is provided with arc-shaped expansion and contraction holes for each connecting column to pass through.

[0016] Optionally, one end of the connecting shaft away from the turntable extends into the movable hollow movable beam, and a torsion spring located in the hollow movable beam is sleeved on the connecting shaft, one torsion arm of the torsion spring is connected to the movable hollow movable beam, and the other torsion arm of the torsion spring is connected to the connecting shaft.

[0017] Optionally, two sliding posts are symmetrically fixed to one end of the connecting shaft away from the turntable, through holes are circumferentially opened on the hollow movable beam for each sliding post to pass through, and spiral grooves corresponding to each sliding post are opened on the inner wall of the supporting beam body.

[0018] Optionally, the spiral groove includes a first spiral segment, a straight segment and a second spiral segment arranged in sequence from the outside to the inside.

[0019] The present invention also provides a supporting structure, comprising the foundation pit supporting beam as described above, and also comprising retaining piles arranged along the inner walls on both sides of the foundation pit, wherein the foundation pit supporting beam is fixed between two opposite retaining piles.

[0020] Compared with the prior art, the present invention provides a foundation pit support beam and a support structure thereof, which have the following beneficial effects:

[0021] 1. The present invention provides a hollow movable beam and a telescopic adjustment mechanism, which can be flexibly adjusted according to the actual width of the foundation pit without changing the main structure, without cutting or splicing, which greatly simplifies the construction process, makes the construction process faster, and greatly shortens the construction period.

[0022] 2. The present invention provides a fixed shell, an expansion and retraction mechanism and an end plate. When the foundation pit needs to be supported, each end plate can be smoothly expanded, effectively expanding the contact range with the retaining piles. This design makes the foundation pit support more stable and reliable, and effectively overcomes the problem of insufficient support force caused by limited contact range in the prior art. While improving the foundation pit support effect, it also greatly reduces the risk of construction safety accidents caused by unstable support.

[0023] After the support beam body is removed, the hollow movable beam can be put into the hollow cavity and the end plate can be folded. This design greatly reduces the space occupied by the structure. Compared with the prior art, the present invention has significant advantages in transportation and storage, which not only saves transportation costs, but also improves transportation efficiency, providing great convenience for space utilization on the construction site. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a state diagram after the support beam body in Example 1 is removed;

[0025] Figure 2 It is a structural schematic diagram of the telescopic adjustment mechanism in the first embodiment;

[0026] Figure 3 This is a schematic diagram of the structure inside the fixed shell in Example 1;

[0027] Figure 4 It is a schematic diagram of the structure of the spiral groove in the first embodiment;

[0028] Figure 5 Schematic diagram of the structure of the spiral groove in other viewing angles in Example 1;

[0029] Figure 6 This is a schematic diagram of the spiral groove structure of another embodiment of the first embodiment;

[0030] Figure 7 A schematic structural diagram of a spiral groove from another perspective of another embodiment of the first embodiment;

[0031] Figure 8 is a plan view of a spiral groove of another embodiment in the first embodiment;

[0032] Fig. 9 This is a schematic diagram of the structure of the exterior of the fixed shell in Embodiment 1;

[0033] Fig.10 It is a structural schematic diagram of the turntable in the first embodiment;

[0034] Fig.11 It is a schematic diagram of the overall structure in the second embodiment.

[0035] In the figure: 1. Support beam body; 2. Hollow movable beam; 3. Telescopic adjustment mechanism; 301. Bracket; 302. Bidirectional screw; 303. Guide rib; 304. Guide groove; 4. Fixed shell; 5. Extension and retraction mechanism; 501. Movable rod; 502. Connecting column; 503. Connecting shaft; 504. Turntable; 505. Arc-shaped extension and retraction hole; 6. End plate; 7. Handle; 8. First bevel gear; 9. Second bevel gear; 10. Fixing hole; 11. Torsion spring; 12. Sliding column; 13. Through hole; 14. Spiral groove; 15. Guard pile. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figures 1 to 10 A foundation pit support beam includes a support beam body 1, which is made of high-strength material and has good bearing capacity and stability to ensure the reliability of the entire structure. A hollow cavity is provided inside the support beam body 1 for installing other components.

[0038] This embodiment also includes: two hollow movable beams 2 , a telescopic adjustment mechanism 3 and two fixed shells 4 .

[0039] Among them, two hollow movable beams 2 are movably inserted at both ends of the supporting beam body 1. The movable beam adopts a hollow structure design, which not only reduces the weight, but also maintains sufficient strength and rigidity, and is convenient for the installation of other components; the length of the hollow movable beam 2 can be accurately adjusted according to actual needs to adapt to foundation pits with different widths. The telescopic adjustment mechanism 3 is arranged in the hollow cavity, which is used to drive the two hollow movable beams 2 to telescope, so as to adapt to foundation pits of different widths. There is no need to cut or splice the supporting beams, which significantly reduces the complexity and difficulty of construction, improves construction efficiency, and reduces construction costs.

[0040] The telescopic adjustment mechanism 3 is described below:

[0041] The main function of the telescopic adjustment mechanism 3 is to drive the two hollow movable beams 2 to achieve telescopic movement. The driving mode includes but is not limited to motor drive, hydraulic drive or mechanical drive, etc., which can be selected according to actual needs.

[0042] In this embodiment, the telescopic adjustment mechanism 3 includes a bracket 301 fixed in the hollow cavity, which is rotatably connected to a bidirectional screw 302 arranged along the axis of the support beam body 1 through a bearing and a shaft seat, and thread grooves are respectively provided in the two hollow movable beams 2 to be spirally matched with the two ends of the bidirectional screw 302. This embodiment adopts a mechanical drive method, and when the bidirectional screw 302 rotates, it can drive the two hollow movable beams 2 to move closer to or away from each other, so that the hollow movable beams 2 are retracted into the hollow cavity or extended out of the hollow cavity, thereby adapting to foundation pits of different widths.

[0043] It should be added that the telescopic adjustment mechanism 3 also includes a guide rib 303 fixed to the inner end of each hollow movable beam 2, and a guide groove 304 is provided in the hollow cavity, which is arranged along the axial direction of the support beam body 1 and matches each guide rib 303 one by one. The guide rib 303 can slide in the guide groove 304, thereby guiding the hollow movable beam 2, so that the hollow movable beam 2 can only move along the axial direction of the support beam body 1, and the hollow movable beam 2 is prevented from rotating with the bidirectional screw 302.

[0044] It should be noted that the support beam body 1 is rotatably connected with a handle 7 via a rotating shaft, a first bevel gear 8 located in the hollow cavity is fixed on the rotating shaft, and a second bevel gear 9 meshing with the first bevel gear 8 is fixed on the bidirectional screw 302. When adjustment is required, the staff rotates the handle 7 to drive the rotating shaft to rotate, thereby driving the bidirectional screw 302 to rotate through the cooperation of the first bevel gear 8 and the second bevel gear 9, and then driving the two hollow movable beams 2 to move closer to or away from each other to adapt to foundation pits of different widths.

[0045] In addition, two fixed shells 4 are respectively fixed to the outer ends of two hollow movable beams 2, and an expansion and retraction mechanism 5 is arranged in each fixed shell 4. A plurality of end plates 6 connected to the expansion and retraction mechanism 5 are arranged at intervals along the circumferential direction on the periphery of each fixed shell 4. When it is necessary to support the foundation pit, each end plate 6 can be expanded to expand the contact range with the foundation pit, so that the foundation pit can be stably supported to withstand the soil pressure from the foundation pit. After the support beam body 1 is removed, the hollow movable beam 2 can be put into the hollow cavity, and the end plates 6 can be folded, thereby greatly reducing the space occupied by the structure and facilitating transportation.

[0046] In this embodiment, the end plate 6 is an arc-shaped structure, which is convenient to be close to the fixed shell 4 after being folded, so as to reduce the volume of the structure. A plurality of fixing holes 10 are opened on the end plate 6, and the end plate 6 can be fixed to the side wall of the foundation pit by the cooperation of bolts and the fixing holes 10.

[0047] Preferably, the outer contour of the fixed shell 4 is disc-shaped. When the end plate 6 is in a folded state, the end plate 6 is concentric with the fixed shell 4, thereby minimizing the volume of the structure and facilitating transportation of the structure.

[0048] The following is a description of the unfolding and retracting mechanism 5:

[0049] The unfolding and retracting mechanism 5 comprises a movable rod 501 fixed on each end plate 6, each movable rod 501 is inserted into the fixed shell 4 along the radial direction of the fixed shell 4, and a connecting column 502 is fixed at the inner end of each movable rod 501. When the movable rod 501 moves along the radial direction of the fixed shell 4, the end plate 6 can be driven to unfold or retract. A connecting shaft 503 is rotatably connected in the fixed shell 4 through a bearing and a shaft seat, and a rotating disk 504 located in the fixed shell 4 is fixed at the end of the connecting shaft 503, and an arc-shaped unfolding and retracting hole 505 is opened on the rotating disk 504 for each connecting column 502 to pass through one by one.

[0050] When the connecting shaft 503 rotates, the rotating disk 504 can be driven to rotate, thereby driving the connecting column 502 to slide in the arc-shaped expansion and retraction hole 505; when the connecting column 502 moves to the innermost end of the arc-shaped expansion and retraction hole 505, the movable rod 501 is retracted into the fixed shell 4, so that the end plate 6 is close to the fixed shell 4 to reduce the space occupied by the structure. When the connecting column 502 moves to the outermost end of the arc-shaped expansion and retraction hole 505, the movable rod 501 extends outside the fixed shell 4, so that the end plate 6 is away from the fixed shell 4, so as to expand the contact range between the end plate 6 and the foundation pit, thereby providing stability for supporting the foundation pit.

[0051] It is worth mentioning that one end of the connecting shaft 503 away from the rotating disk 504 extends into the movable hollow movable beam 2, and a torsion spring 11 located in the hollow movable beam 2 is sleeved on the connecting shaft 503, one torsion arm of the torsion spring 11 is connected to the movable hollow movable beam 2, and the other torsion arm of the torsion spring 11 is connected to the connecting shaft 503. In the normal state, under the action of the elastic force of the torsion spring 11, the position of the rotating disk 504 remains unchanged; in this position, the connecting column 502 is located at the outermost end of the arc-shaped expansion and retraction hole 505, and the end plate 6 is in the expanded state.

[0052] It should be supplemented that two sliding columns 12 are symmetrically fixed to the end of the connecting shaft 503 away from the turntable 504, through holes 13 are circumferentially opened on the hollow movable beam 2 for each sliding column 12 to pass through, and spiral grooves 14 corresponding to each sliding column 12 are opened on the inner wall of the support beam body 1.

[0053] In this embodiment, if Figure 4 and Figure 5As shown, the spiral groove 14 is a large-lead spiral structure, which is convenient for driving the connecting shaft 503 to rotate. When the hollow movable beam 2 is received in the hollow cavity, the sliding column 12 can be driven to slide in the spiral groove 14, so that the connecting shaft 503 and the rotating disk 504 can be driven to rotate through the cooperation of the sliding column 12 and the through hole 13, so that the connecting column 502 moves to the innermost end of the arc-shaped expansion and contraction hole 505, thereby closing the end plate 6. When the sliding column 12 slides out of the spiral groove 14, the end plate 6 can be fully expanded under the action of the torsion spring 11. With this structure, the end plate 6 can be automatically expanded and contracted without setting up an additional power structure, saving time and effort.

[0054] In another embodiment, Figure 6 , Figure 7 and Figure 8 As shown, the spiral groove 14 includes a first spiral segment, a straight segment, and a second spiral segment arranged in sequence from the outside to the inside. In the process of receiving the hollow movable beam 2 into the supporting beam body 1, the sliding column 12 first slides in the first spiral segment, thereby retracting the end plate 6 to a certain extent; when the sliding column 12 slides in the straight segment, the end plate 6 continues to move toward the supporting beam body 1 at a certain extent; when the sliding column 12 slides in the second spiral segment, the end plate 6 can continue to be retracted until the end plate 6 is completely retracted.

[0055] With the above structure, when the hollow movable beam 2 is pulled out from the supporting beam body 1, when the sliding column 12 slides in the second spiral section, the end plate 6 is less expanded, which is suitable for foundation pits with smaller widths. When the sliding column 12 slides in the straight section, the end plate 6 remains in a certain degree of expansion state, which is suitable for foundation pits with medium widths. When the sliding column 12 slides in the first spiral section, the end plate 6 continues to expand until it is fully expanded, thereby adapting to foundation pits with larger widths. With this structure, the end plate 6 has a two-stage expansion capability, so that it can better adapt to foundation pits of different widths and has better applicability.

[0056] Example 2: Please refer to Fig.11 This embodiment also proposes a supporting structure, including the foundation pit support beam as described above, and also includes retaining piles 15 arranged along the inner walls on both sides of the foundation pit, and the foundation pit support beam is fixed between two opposite retaining piles 15.

[0057] When it is necessary to support the foundation pit, the retaining piles 15 arranged along the inner wall of the foundation pit are first fixed in the foundation pit, and then the support beam body 1 is lifted between the two opposite retaining piles 15; then, the handle 7 is turned, and the cooperation of the first bevel gear 8 and the second bevel gear 9 drives the bidirectional screw 302 to rotate, thereby driving the two hollow movable beams 2 to move away from each other and extend outside the hollow cavity; in this process, after the sliding column 12 slides out of the spiral groove 14, under the action of the torsion spring 11, the connecting shaft 503 and the turntable 504 rotate and reset, thereby driving the connecting column 502 to move to the outermost end of the arc-shaped expansion and retraction hole 505, so that the movable rod 501 extends radially along the fixed shell 4, thereby unfolding the end plate 6; the two hollow movable beams 2 continue to move away from each other until the fixed shell 4 and the unfolded end plate 6 collide with the retaining piles 15; finally, through the cooperation of the bolts and the fixing holes 10, the unfolded end plate 6 is fixed to the retaining piles 15, and a supporting structure for supporting the foundation pit can be formed.

[0058] When the support structure needs to be dismantled, first remove the bolts in the fixing holes 10, and lift the support beam body 1 through the lifting equipment, then turn the handle 7 to drive the bidirectional screw 302 to rotate in the opposite direction, thereby driving the two hollow movable beams 2 to approach each other and put the hollow movable beams 2 into the hollow cavity. In this process, when the slide column 12 moves into the spiral groove 14, it can slide along the track of the spiral groove 14, thereby driving the slide column 12 to slide in the through hole 13, and then driving the connecting shaft 503 and the turntable 504 to rotate, so that the connecting column 502 moves to the innermost end of the arc-shaped expansion and retraction hole 505; at this time, the movable rod 501 moves along the radial direction of the fixed shell 4 and is put into the fixed shell 4, so that the end plate 6 moves closer to the fixed shell 4 to reduce the volume occupied by the structure and facilitate the transportation of the structure.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit support beam, comprising a support beam body (1), wherein a hollow cavity is provided inside the support beam body (1), characterized in that: Also includes: Two hollow movable beams (2), the two hollow movable beams (2) are movably inserted at two ends of the supporting beam body (1); A telescopic adjustment mechanism (3), wherein the telescopic adjustment mechanism (3) is arranged in the hollow cavity and is used to drive the two hollow movable beams (2) to telescope; Two fixed shells (4) are respectively fixed to the outer ends of two hollow movable beams (2); an expansion and contraction mechanism (5) is arranged in each fixed shell (4); and a plurality of end plates (6) connected to the expansion and contraction mechanism (5) are arranged at intervals along the circumferential direction on the periphery of each fixed shell (4).

2. A foundation pit support beam according to claim 1, characterized in that: The telescopic adjustment mechanism (3) comprises a bracket (301) fixed in the hollow cavity, the bracket (301) being rotatably connected to a bidirectional screw (302) arranged along the axis of the support beam body (1) through a bearing and a shaft seat, and thread grooves which are spirally matched with the two ends of the bidirectional screw (302) are respectively provided in the two hollow movable beams (2); The telescopic adjustment mechanism (3) also includes a guide rib (303) fixed to the inner end of each hollow movable beam (2), and a guide groove (304) is provided in the hollow cavity, which is arranged along the axial direction of the support beam body (1) and matches each guide rib (303) one by one.

3. A foundation pit support beam according to claim 2, characterized in that: A handle (7) is rotatably connected to the outside of the support beam body (1) via a rotating shaft, a first bevel gear (8) located in the hollow cavity is fixed on the rotating shaft, and a second bevel gear (9) meshing with the first bevel gear (8) is fixed on the bidirectional screw (302).

4. The foundation pit support beam according to claim 1, characterized in that: The end plate (6) is an arc-shaped structure, and a plurality of fixing holes (10) are provided on the end plate (6).

5. The foundation pit support beam according to claim 4, characterized in that: The outer contour of the fixed shell (4) is disc-shaped, and when the end plate (6) is in a retracted state, the end plate (6) and the fixed shell (4) are cocentric.

6. The foundation pit support beam according to claim 1, characterized in that: The unfolding and retracting mechanism (5) comprises a movable rod (501) fixed on each end plate (6), each movable rod (501) is movably inserted into the fixed shell (4), and a connecting column (502) is fixed at the inner end of each movable rod (501); A connecting shaft (503) is rotatably connected in the fixed shell (4) through the cooperation of a bearing and a shaft seat, a rotating disk (504) located in the fixed shell (4) is fixed at the end of the connecting shaft (503), and arc-shaped expansion and contraction holes (505) are provided on the rotating disk (504) for each connecting column (502) to pass through.

7. The foundation pit support beam according to claim 6, characterized in that: One end of the connecting shaft (503) away from the rotating disk (504) extends into the movable hollow movable beam (2), and a torsion spring (11) located in the hollow movable beam (2) is sleeved on the connecting shaft (503), one torsion arm of the torsion spring (11) is connected to the movable hollow movable beam (2), and the other torsion arm of the torsion spring (11) is connected to the connecting shaft (503).

8. The foundation pit support beam according to claim 7, characterized in that: Two sliding posts (12) are symmetrically fixed to one end of the connecting shaft (503) away from the rotating disk (504), through holes (13) are circumferentially provided on the hollow movable beam (2) for each sliding post (12) to pass through, and spiral grooves (14) corresponding to each sliding post (12) are provided on the inner wall of the supporting beam body (1).

9. The foundation pit support beam according to claim 8, characterized in that: The spiral groove (14) comprises a first spiral segment, a straight segment and a second spiral segment which are arranged in sequence from the outside to the inside.

10. A supporting structure, comprising the foundation pit supporting beam according to any one of claims 1 to 9, characterized in that: It also includes retaining piles (15) arranged along the inner walls on both sides of the foundation pit, and the foundation pit support beam is fixed between two opposite retaining piles (15).

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