Deep foundation pit supporting device

Abstract

The utility model provides a deep foundation pit supporting device which comprises an inner supporting structure and retaining walls arranged on the two sides of the inner supporting structure. The inner supporting structure comprises a distance adjusting structure, the distance adjusting structure is provided with a control mechanism and movable ends on the two sides of the control mechanism, the distance adjusting structure is connected with a supporting structure at the movable ends, the other end of the supporting structure is fixedly connected with a supporting plate, and the supporting plate abuts against the corresponding retaining wall. The inner support can adapt to deep foundation pits of different sizes, and the side wall of the deep foundation pit can be uniformly supported by increasing the contact area of the inner support and the retaining wall, enlarging the stress surface of the retaining wall and reducing local pressure.

Description

Technical Field

[0001] This utility model relates to the field of building foundation pit support equipment, specifically to a deep foundation pit support device. Background Technology

[0002] Deep foundation pit excavation is a crucial step in modern construction engineering. Supporting deep foundation pits effectively supports the soil and prevents soil erosion. Among various deep foundation pit support methods, retaining walls combined with internal bracing are widely used due to their excellent support performance.

[0003] However, the existing retaining wall + internal bracing support method still has some technical shortcomings in practical applications. Currently, steel pipes are commonly used as internal bracing to support the retaining walls on both sides. However, due to the varying dimensions of deep foundation pits and the fixed length of the steel pipes, the pipes cannot flexibly adapt to the needs of different pit sizes and are difficult to reuse. Furthermore, the small contact area between the steel pipes and the retaining wall leads to uneven stress on the retaining wall, making it prone to localized deformation and affecting the overall stability of the support structure. Simultaneously, the steel pipe internal bracing cannot provide uniform support to the sidewalls of deep foundation pits, further increasing the risk of support structure failure. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a deep foundation pit support device that can adapt to deep foundation pits of different sizes, and by increasing the contact area between the internal support and the retaining wall, expanding the stress surface of the retaining wall, reducing local pressure, and achieving uniform support for the sidewall of the deep foundation pit.

[0005] This utility model provides a deep foundation pit support device, including an internal support structure and retaining walls on both sides of the internal support structure; the internal support structure includes an adjustable structure, the adjustable structure has a control mechanism and movable ends on both sides of the control mechanism, the adjustable mechanism is connected to a support structure at the movable end, and the other end of the support structure is fixedly connected to a support plate, the support plate abutting against the corresponding retaining wall.

[0006] In one embodiment, the adjusting structure includes a slide rod, on which the control structure is disposed, and push blocks are slidably connected to both sides of the control structure on the slide rod. The push blocks are connected to the control mechanism, and the support structure is slidably connected to the outside of the push blocks on the slide rod.

[0007] In one embodiment, a push rod is hinged between the control structure and the push block.

[0008] In one embodiment, the control mechanism includes a mounting base, on which a screw is mounted. From top to bottom, a nut and a lifting slider are sequentially fitted onto the screw, and the two sides of the lifting slider are movably connected to the movable end.

[0009] In one embodiment, the mounting base is provided with limiting rods on both sides of the screw, and the limiting rods pass through the lifting slider and are slidably connected to the lifting slider.

[0010] In one embodiment, the support structure includes a force-equalizing block, the middle of which is movably connected to the corresponding movable end. Multiple struts are fixedly connected between the force-equalizing block and the support plate bracket, and the multiple struts are arranged circumferentially relative to the middle of the force-equalizing block.

[0011] In one embodiment, the support plate is provided with multiple fixing seats, and the force equalizing block is provided with multiple circular slots. The two ends of the support rod are respectively inserted and fixed in the corresponding circular slots and fixing seats.

[0012] In one embodiment, the support plate is provided with multiple reinforcing ribs, and the ends of the struts are connected to the reinforcing ribs.

[0013] The beneficial effects of the deep foundation pit support device provided in this embodiment of the utility model are as follows:

[0014] 1. The internal support structure of this utility model can adjust its length through the adjustable spacing structure, and can adapt to deep foundation pit environments of different widths.

[0015] 2. This utility model expands the force-bearing surface of the retaining wall by using a support structure, reduces local pressure, protects the strength of the retaining wall, and makes the support force on the retaining wall more uniform.

[0016] 3. This utility model uses a hydraulic wrench to tighten or loosen the nut, thereby adjusting the length of the inner support, which is more convenient, faster and less labor-intensive. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an implementation diagram of the deep foundation pit support device provided in this utility model embodiment.

[0019] Figure 2 This is a structural schematic diagram of the deep foundation pit support device provided in this embodiment of the utility model.

[0020] Figure 3 This is a schematic diagram of the support structure provided in an embodiment of the present utility model.

[0021] Figure 4 This is a schematic diagram of the adjustable distance structure provided in an embodiment of the present invention.

[0022] Reference numerals in the attached drawings: 1-Retaining wall; 2-Deep foundation pit; 3-Support plate; 4-Fixed seat; 5-Strut; 6-Force equalizing block; 7-Reinforcing rib; 8-Hydraulic wrench; 9-Slide rod; 10-Push block; 11-Mounting base; 12-Screw; 13-Lifting slider; 14-Limit rod; 15-Push rod; 16-Nut; 17-Internal support mechanism; 18-Sleeve. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present utility model. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present utility model.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0025] like Figures 1 to 4 As shown, a deep foundation pit support device includes an internal support structure 17 and retaining walls 1 on both sides of the internal support structure 17. The retaining walls 1 are arranged on the side walls of the deep foundation pit 2. The internal support structure 17 includes an adjustable structure, which has a control mechanism and movable ends on both sides of the control mechanism. The adjustable structure is connected to a support structure at the movable end. The other end of the support structure is fixedly connected to a support plate 3, and the support plate 3 abuts against the corresponding retaining wall 1.

[0026] The adjustable distance structure includes a slide rod 9, which can be a circular rod. The control structure is set on the slide rod 9. Push blocks 10 are slidably connected to both sides of the control structure on the slide rod 9. The push blocks 10 are connected to the control mechanism. The support structure is slidably connected to the outside of the push blocks 10 on the slide rod 9.

[0027] The control structure is hinged to the push block 10 by a push rod 15. Specifically, both ends of the push rod 15 are hinged to the corresponding lifting slider 13 and the push block 10.

[0028] The control mechanism includes a mounting base 11, which is sleeved on the slide rod 9. A screw 12 is provided on the mounting base 11. A nut 16 and a lifting slider 13 are sequentially sleeved on the screw 12 from top to bottom. The nut 16 is threadedly engaged with the screw 12, and a washer structure is formed at the bottom, which abuts against the lifting slider 13 through the washer structure.

[0029] The two sides of the lifting slider 13 are movably connected to the movable end. Specifically, the two movable ends on both sides of the lifting slider 13 are respectively composed of a push rod 15 and a push block 10. A support structure is sleeved on the outside of each movable end on the slider 9, and the push block 10 abuts against the force equalizing block 6 of the corresponding support structure.

[0030] Limiting rods 14 are provided on both sides of the screw 12 on the mounting base 11. The limiting rods 14 pass through the lifting slider 13 and are slidably connected to the lifting slider 13.

[0031] The support structure includes a force equalizing block 6, the middle of which is movably connected to the corresponding movable end. Multiple support rods 5 are fixedly connected between the force equalizing block 6 and the support plate 3 bracket, and the multiple support rods 5 are arranged circumferentially relative to the middle of the force equalizing block 6.

[0032] When the lifting slider 13 descends along the screw 12, the push blocks 10 on both sides of the control structure move in opposite directions along the slide rod 9 under the thrust of the push rod 15. The two push blocks 10 move until their outer sides abut against the end face of the force equalizing block 6 sleeve, at which point the support structure, support plate, and retaining wall can be fixed.

[0033] The support plate 3 is provided with multiple fixing seats 4, and the force equalizing block 6 is provided with multiple circular slots. The two ends of the support rod 5 are respectively inserted and fixed in the corresponding circular slots and fixing seats 4.

[0034] The support plate 3 is provided with multiple reinforcing ribs 7, and the fixing seat 4 is fixed on the reinforcing ribs 7. Therefore, the end of the strut 5 is connected to the reinforcing ribs 7 through the fixing seat 4. In this embodiment, the support plate 3 can be configured as a square plate structure, with its outer side abutting against the retaining wall 1.

[0035] like Figure 3 As shown, in this embodiment, four support rods 5 are provided, and four fixing seats 4 are also provided accordingly. The force equalizing block 6 is a cross-shaped rod structure, and a sleeve 18 is formed inward from the middle. The sleeve 18 is fitted onto the sliding rod 9. The outermost ends of the rods surrounding the force equalizing block 6 are respectively provided with circular slots corresponding to multiple fixing seats 4. Multiple reinforcing ribs 7 are set in the middle of the support plate 3 as cross-shaped support frames corresponding to the force equalizing block 6, and four fixing seats 4 are respectively provided on each support side of the cross-shaped support frame. The periphery of the cross-shaped support frame can also be reinforced with multiple reinforcing ribs 7 to form a grid-like structure. Threaded holes are reserved on the reinforcing ribs 7, and the fixing seats 4 are fixed to the reinforcing ribs 7 by bolts engaging the threaded holes.

[0036] In the specific implementation of this embodiment:

[0037] The retaining walls 1 on both sides are arranged on the sidewalls of the deep pit 2, and the internal support structure 17 is arranged inside the deep pit 2. First, the support plate 3, the fixing seat 4, the strut 5, and the force equalizing block 6 are assembled and connected to both ends of the sliding rod 9. Then, the support plate 3 is attached to the inner sidewall of the retaining wall 1. The hydraulic wrench 8 is attached to the top of the screw 12 and used to tighten the nut 16, causing the lifting slider 13 to move down along the screw 12, widening the distance between the two push blocks 10 until the push blocks 10 contact the force equalizing block 6. After ensuring that the retaining wall 1 is tightly attached to the sidewall of the deep pit 2, the hydraulic wrench 8 is removed. Under the action of the nut 16, the length of the internal support structure 17 is fixed and supports the retaining walls 1 on both sides. During dismantling, the nut 16 is removed using the hydraulic wrench 8, and the support device is retrieved.

[0038] The hydraulic wrench 8 is a mature existing technology and equipment. When the deep foundation pit 2 is too large, multiple internal support structures 17 can be set between the two retaining walls 1 for support. That is, the slide rod 9 can be spliced ​​and fixed in multiple sections, and multiple adjustment structures are set on the slide rod 9 along the axial direction of the slide rod 9. The push blocks 10 of two adjacent adjustment structures abut against each other.

[0039] Based on the description and drawings of this utility model, those skilled in the art can easily manufacture or use the deep foundation pit support device of this utility model, and can produce the positive effects described in this utility model.

[0040] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0041] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A deep foundation pit support device characterized by: It includes an inner support structure (17) and retaining walls (1) on both sides of the inner support structure (17); the inner support structure (17) includes an adjustable structure, the adjustable structure has a control mechanism and movable ends on both sides of the control mechanism, the adjustable mechanism is connected to the support structure at the movable end, and the other end of the support structure is fixedly connected to the support plate (3), the support plate (3) abuts against the corresponding retaining wall (1); The adjustable distance structure includes a slide rod (9), on which the control mechanism is provided, and push blocks (10) are slidably connected on both sides of the control mechanism on the slide rod (9). The push blocks (10) are connected to the control mechanism, and the support structure is slidably connected on the outside of the push blocks (10) on the slide rod (9). A push rod (15) is hinged between the control mechanism and the push block (10).

2. The deep foundation pit supporting device according to claim 1, characterized in that: The control mechanism includes a mounting base (11), on which a screw (12) is mounted. From top to bottom, a nut (16) and a lifting slider (13) are sequentially mounted on the screw (12). The two sides of the lifting slider (13) are movably connected to the movable end.

3. The deep foundation pit support device according to claim 2, characterized in that: On the mounting base (11), limit rods (14) are provided on both sides of the screw (12). The limit rods (14) pass through the lifting slider (13) and are slidably connected to the lifting slider (13).

4. The deep excavation bracing device of claim 1, wherein: The support structure includes a force equalizing block (6), the middle part of which is movably connected to the corresponding movable end. Multiple struts (5) are fixedly connected between the force equalizing block (6) and the support plate (3) bracket. The multiple struts (5) are arranged circumferentially relative to the middle part of the force equalizing block (6).

5. The deep excavation bracing device of claim 4, wherein: The support plate (3) is provided with multiple fixed seats (4), and the force equalizing block (6) is provided with multiple circular slots. The two ends of the support rod (5) are respectively inserted and fixed in the corresponding circular slots and fixed seats (4).

6. The deep excavation bracing device of claim 4, wherein: Multiple reinforcing ribs (7) are provided on the support plate (3), and the end of the strut (5) is connected to the reinforcing ribs (7).

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