Foundation pit supporting device

Abstract

The utility model discloses a foundation pit supporting device in the technical field of foundation pit construction, which is characterized in that supporting arms are hinged to supporting plates, lifting seats are hinged to one ends, far away from the supporting plates, of the supporting arms, the supporting arms on two opposite supporting plates are mounted at two ends of the same lifting seat, and the lifting seats are meshed on lifting rods in a threaded manner. The height of the lifting seat can be controlled by rotating the lifting rod to adjust the height difference between the two ends of the supporting arm, so that the supporting arm extrudes the supporting plate to form support, foundation pits with different sizes can be adapted within the adjusting range of the supporting arm, and meanwhile, the whole device is very simple and convenient to mount and dismount; the whole device can be placed in a foundation pit or taken out of the foundation pit at a time, and the mounting and dismounting difficulty of the foundation pit support is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit construction, in particular to a foundation pit supporting device. Background Art

[0002] With the development of the Southeast Asian economy, the continuous expansion of urban scale, and the rapid development of urban road and rail transit, more and more underground projects are being constructed in high-water-level sandy silt layers. On the other hand, the particle distribution characteristics of sandy silt layers determine their liquefaction and sand flow piping characteristics, which determine the poor engineering properties and engineering difficulties of sandy silt layers. When constructing a building, foundation pits are excavated as needed. In deep foundation pits, support devices are required to protect the excavated deep pits to prevent the deep pits from collapsing due to moisture in the soil.

[0003] The installation of support plates on the side of the foundation pit is basically the same, but there are various support methods for the support plates according to actual conditions. At present, in small foundation pits, most of them use a steel pipe or I-beam horizontally placed between the support plates. In order to prevent the steel pipe or I-beam from falling, it is necessary to weld the two ends of the steel pipe or I-beam to the surface of the support plate, and separate the steel pipe or I-beam from the support plate by cutting during disassembly. It is not easy to use. At the same time, when supporting in foundation pits of different sizes, it is necessary to cut the steel pipe or I-beam on site according to the size of the foundation pit, which has low applicability and is inconvenient to use.

[0004] Based on this, the utility model designs a foundation pit supporting device to solve the above problems. Utility Model Content

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a foundation pit support device for supporting the side walls of a foundation pit, characterized in that: it includes a support plate and an adjustment mechanism; there are two support plates, and the two support plates are respectively used to support the two sides of the foundation pit; the adjustment mechanism includes a base, a lifting rod, a lifting seat and a support arm, the bottom end of the lifting rod is inserted into the base and rotates with the base with the axis of the lifting rod as the rotation axis, the lifting seat is threadedly engaged with the lifting rod, and two support arms are hinged on the lifting seat, and the two support plates are respectively hinged to the ends of the two support arms away from the lifting seat.

[0006] As a further solution of the present invention, the support plate is composed of at least two support plates, which are vertically combined to form a support plate, and the support arm is hinged to the side of the support plate facing the lifting rod. The number of the lifting seats is the same as the number of support plates contained in a single support plate, so that a support arm is hinged on each support plate.

[0007] As a further solution of the present invention, the support plates are provided with connecting components for connecting the support plates to each other.

[0008] As a further solution of the present invention, the connecting assembly includes an inserting portion installed on the top of the support plate and an inserting slot opened at the bottom of the support plate, and the inserting portion and the inserting slot are plugged in and matched to realize the mutual connection of the support plates.

[0009] As a further solution of the present invention, pin connection holes are provided on the surface of the insertion part and in the inner cavity of the insertion groove. The pin connection holes provided on the surface of the insertion part correspond one-to-one to the pin connection holes provided in the inner cavity of the insertion groove, and the pin connection holes provided in the inner cavity of the insertion groove penetrate to the outer surface of the support plate.

[0010] As a further solution of the present invention, fixing nails are vertically penetrated through the base.

[0011] As a further solution of the present invention, an anti-retraction protrusion is fixedly provided on the bottom of the circumferential surface of the fixing nail.

[0012] As a further solution of the present invention, the lower end surface of the anti-retraction protrusion is tilted upward on a side away from the fixing nail.

[0013] As a further solution of the present invention, the fixing nail is threadably matched with the base.

[0014] As a further solution of the present invention, a column is fixedly provided on the base, and a plurality of mounting rings for mounting lifting rods are provided on the column. The lifting rods are passed through the mounting rings and rotatably cooperate with the mounting rings.

[0015] The utility model has the following beneficial effects:

[0016] This device is achieved by hingedly connecting the support arm to the support plate, and hingedly connecting a lifting seat at the end of the support arm away from the support plate, and installing the support arms on two opposite support plates at both ends of the same lifting seat. The lifting seat is threadedly engaged with the lifting rod. By rotating the lifting rod, the height of the lifting seat can be controlled to adjust the height difference between the two ends of the support arm, so that the support arm squeezes the support plate to form a support. Within the adjustment range of the support arm, it can adapt to foundation pits of different sizes. At the same time, the overall device is very easy to install and disassemble. The overall device can be placed in or taken out of the foundation pit at one time, effectively reducing the difficulty of installation and disassembly of foundation pit support.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a structural diagram of the connecting component in the utility model.

[0021] Figure 3 It is a structural schematic diagram of the fixing nail in the utility model.

[0022] Figure 4 It is a structural schematic diagram of the installation ring in the utility model.

[0023] Legend:

[0024] 1. Base; 2. Lifting rod; 3. Lifting seat; 4. Support arm; 5. Support plate; 61. Insertion part; 62. Pin hole; 7. Fixing nail; 71. Anti-retraction protrusion; 8. Mounting ring. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0026] See also Figure 1-4 The utility model provides a foundation pit supporting device for supporting the side wall of the foundation pit, comprising a supporting plate and an adjusting mechanism.

[0027] There are two support plates, which are arranged relative to each other to support the sides of the foundation pit. The adjustment mechanism is used to provide support force for the support plates, and the spacing between the support plates is adjustable to adapt to foundation pits of different sizes.

[0028] Specifically, the adjustment mechanism includes a base 1, a lifting rod 2, a lifting seat 3 and a supporting arm 4. The bottom end of the lifting rod 2 is inserted into the base 1 and rotates with the base 1 with the axis of the lifting rod 2 as the rotation axis. The lifting seat 3 is threadedly engaged with the lifting rod 2, and two supporting arms 4 are hinged on the lifting seat 3. The two supporting plates are respectively hinged to the ends of the two supporting arms 4 away from the lifting seat 3. Through the threaded cooperation between the lifting seat 3 and the lifting rod 2, when the lifting seat 3 and the lifting rod 2 are relatively rotated, the height position of the lifting seat 3 on the lifting rod 2 can be adjusted. When working, first, the whole The device is placed in the foundation pit, and the bottom surface of the base 1 is fitted with the bottom surface of the foundation pit, and the two supporting plates are fitted with the foundation pit respectively. When the supporting plates are fitted with the foundation pit, the side of the supporting plates facing away from the supporting arms 4 is fitted with the side of the foundation pit, and the bottom surface of the supporting plates is in contact with the bottom surface of the foundation pit. Next, the lifting rod 2 is rotated to make the lifting seat 3 rise or fall on the lifting rod 2, so that the height difference between the two ends of the supporting arms 4 is reduced, and the supporting arms 4 slowly tend to the horizontal state from the inclined state, so that the vertical projection length of the supporting arms 4 is increased, so that the supporting plates are squeezed by the supporting arms 4 to achieve support for the foundation pit.

[0029] The lifting rod 2 is a screw rod, and a threaded hole is provided in the middle of the lifting seat 3 to achieve threaded cooperation between the lifting seat 3 and the lifting rod 2 .

[0030] Preferably, when installing the support plate, the height of the end of the support arm 4 connected to the lifting seat 3 is lower than the end of the support arm 4 connected to the support plate. In this way, when adjusting the height difference between the two ends of the support arm 4 later, it is necessary to lift the lifting seat 3 upward by rotating the lifting rod 2. At this time, the reaction force exerted by the lifting rod 2 from the lifting seat 3 is downward, and the base 1 is in contact with the bottom surface of the foundation pit. The reaction force applied by the lifting seat 3 to the lifting rod 2 will press the base 1 downward, making the base 1 more stable and the entire support system more stable, thereby improving the safety of the overall support.

[0031] Figure 2 An example of a support plate is shown. In this example, the support plate is composed of at least two support plates 5, and the support plates 5 are connected by a connecting assembly. During use, the number of support plates 5 can be adjusted according to the depth of the foundation pit to form support plates of different heights, which has a wider applicability.

[0032] like Figure 2 As shown, the connecting assembly includes an insertion portion 61 fixed to the top of the support plate 5 and an insertion groove opened at the bottom of the support plate 5. The insertion portion 61 at the top of the support plate 5 is inserted into the insertion groove opened at the bottom end of another support plate 5 to achieve the splicing of the two support plates 5, which is simple and quick to use.

[0033] The figure shows an example of a first-level insertion groove of the insertion portion 61. In this example, the insertion portion 61 includes a boss fixed to the top of the support plate 5 and a column fixed to the top of the boss.

[0034] Furthermore, in order to prevent the support plates 5 that are spliced ​​together from separating, pin holes 62 are opened on the surface of the insertion part 61 and the inner arm of the insertion groove. The pin holes 62 opened on the surface of the insertion part 61 correspond one to one with the pin holes 62 opened in the inner cavity of the insertion groove, and the pin holes 62 opened in the inner cavity of the insertion groove penetrate to the outer surface of the support plate 5. After the two support plates 5 are spliced ​​together, the pin holes 62 on the surface of the insertion part 61 and the pin holes 62 opened in the insertion groove will be exactly aligned. At this time, inserting a pin rod or a screw rod into the pin hole 62 can prevent the support plates 5 that are spliced ​​together from separating, thereby further improving the stability of the overall support plate.

[0035] like Figure 1-2 As shown, when the support plate is composed of several support plates 5, the support arm 4 is hinged to the side of the support plate 5 facing the lifting rod 2, and the number of lifting seats 3 is the same as the number of support plates 5 contained in a single support plate, so that each support plate 5 is hinged with a support arm 4. During support, each support plate 5 is provided with a support arm 4 on the back side to ensure the support effect of the support plate 5, and on the support plate composed of several support plates 5, there will be at least two support arms 4, so that the support plate formed by multiple support plates 5 can always remain in a vertical state, so that the support plate is more evenly stressed, thereby improving the safety of support.

[0036] like Figure 3 As shown, a fixing nail 7 is vertically penetrated on the base 1, and an anti-retreat protrusion 71 is provided at the bottom of the circumferential surface of the fixing nail 7 to prevent the fixing nail 7 from retreating from the soil. When installing the base 1, the fixing nail 7 is passed through the base 1 and inserted into the soil at the bottom of the foundation pit. The anti-retreat protrusion 71 on the circumferential surface of the fixing nail 7 increases the stability of the fixing nail 7 and improves the stability of the overall protective device.

[0037] like Figure 3 As shown, the lower end surface of the anti-retreat protrusion 71 is tilted upward away from the fixing nail 7, so that the lower end surface of the anti-retreat protrusion 71 is an inclined surface. When the fixing nail 7 enters the soil, the lower end surface of the anti-retreat protrusion 71 can squeeze the soil in the direction away from the anti-retreat nail, so that the fixing nail 7 can enter the soil more easily.

[0038] In this example, a threaded hole is provided on the base 1 that passes through the base 1, and an external thread is provided on the surface of the fixing nail 7, so that the fixing nail 7 can be threadedly engaged in the threaded hole provided in the base 1. When installing the fixing nail 7, it is necessary to rotate the fixing nail 7 in the threaded hole. During the process of rotating and feeding the fixing nail 7, the anti-retraction protrusion 71 on the surface of the fixing nail 7 will also engage with the soil along the thread line, which will not seriously damage the soil and cause the soil to loosen, thereby increasing the stability of the fixing nail 7 after installation and allowing the fixing nail 7 to enter the soil more easily.

[0039] In some examples, a column is fixedly provided on the base 1 , and a plurality of mounting rings 8 for mounting the lifting rod 2 are provided on the column. The lifting rod 2 is passed through the mounting ring 8 and rotates with the mounting ring 8 .

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A foundation pit support device for supporting the sidewall of a foundation pit, characterized in that: Including support plates and adjustment mechanisms; There are two support plates, each used to support two sides of the foundation pit. The adjustment mechanism comprises a base (1), a lifting rod (2), a lifting seat (3) and a supporting arm (4); the bottom end of the lifting rod (2) is inserted into the base (1) and rotates with the base (1) with the axis of the lifting rod (2) as the rotation axis; the lifting seat (3) is threadedly engaged with the lifting rod (2), and two supporting arms (4) are hinged on the lifting seat (3); and two supporting plates are respectively hinged to one end of the two supporting arms (4) away from the lifting seat (3).

2. A foundation pit supporting device according to claim 1, characterized in that: The support plate is composed of at least two support plates (5), the support plates (5) are vertically combined to form the support plate, the support arm (4) is hinged to the side of the support plate (5) facing the lifting rod (2), and the number of the lifting seats (3) is the same as the number of support plates (5) included in a single support plate, so that each support plate (5) is hinged to a support arm (4).

3. The foundation pit supporting device according to claim 2, characterized in that: The support plates (5) are provided with connection components for connecting the support plates (5) to each other.

4. The foundation pit supporting device according to claim 3, characterized in that: The connecting assembly comprises an inserting portion (61) mounted on the top of the support plate (5) and an inserting slot provided at the bottom of the support plate (5); the inserting portion (61) and the inserting slot are plugged in and matched to realize the mutual connection of the support plates (5).

5. The foundation pit supporting device according to claim 4, characterized in that: The surface of the insertion portion (61) and the inner cavity of the insertion groove are both provided with pin connection holes (62). The pin connection holes (62) provided on the surface of the insertion portion (61) correspond one-to-one with the pin connection holes (62) provided in the inner cavity of the insertion groove, and the pin connection holes (62) provided in the inner cavity of the insertion groove penetrate to the outer surface of the support plate (5).

6. The foundation pit supporting device according to claim 1, characterized in that: A fixing nail (7) is vertically penetrated through the base (1).

7. The foundation pit supporting device according to claim 6, characterized in that: An anti-retraction protrusion (71) is fixedly provided on the bottom of the circumferential surface of the fixing nail (7).

8. The foundation pit supporting device according to claim 7, characterized in that: The lower end surface of the anti-retraction protrusion (71) is tilted upwards on a side away from the fixing nail (7).

9. The foundation pit supporting device according to claim 6, characterized in that: The fixing nail (7) is threadably engaged with the base (1).

10. The foundation pit supporting device according to claim 1, characterized in that: A column is fixedly provided on the base (1), and a plurality of mounting rings (8) for mounting the lifting rod (2) are provided on the column. The lifting rod (2) is passed through the mounting ring (8) and is rotatably engaged with the mounting ring (8).

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