Supporting frame for subway station foundation pit construction

Abstract

The utility model discloses a metro station foundation pit construction supporting frame which comprises a bottom plate, two movable plates are arranged at the upper end of the bottom plate, sliding blocks are rotationally connected to the bottoms of the two movable plates, and an angle adjusting and controlling mechanism acting on the two movable plates is installed at the position, between the two movable plates, of the upper end of the bottom plate. According to the adjustable supporting frame, the distance between the two supporting plates can be controlled through the adjusting mechanism, so that the total width of the supporting frame can be adjusted according to the requirements of different foundation pits, and meanwhile when the side walls of the foundation pits are inclined, the supporting plates are arranged on the side walls of the foundation pits. The distance between the adjusting rod and the hinging piece is controlled by controlling the length of the telescopic rod of the air cylinder, when the adjusting piece is close to the hinging piece, the opening angle of the two movable plates can be increased, therefore, the inclination angle of the supporting plate can be freely adjusted according to the side wall of the foundation pit, and the supporting frame is wide in application range and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a support frame for subway station foundation pit construction. Background Technique

[0002] For the foundation construction of urban subways, it is necessary to excavate foundation pits, and the main structure construction such as platforms is carried out after the foundation pit construction is completed. The foundation pit project mainly includes the design and construction of the foundation pit support system and earth excavation, which is a comprehensive systematic project that requires close cooperation between geotechnical engineering and structural engineering technicians. The foundation pit support frame is a support, reinforcement and protection measure used for the foundation pit side wall and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit.

[0003] At present, the support frame of the foundation pit is a fixed structure and cannot freely change the length of the support frame according to the size of the foundation pit. Each specification of the foundation pit requires a supporting frame of a matching specification for supporting installation. At the same time, most of the existing support frames can only support the foundation pit with a vertical inner wall. When the inner wall of the foundation pit is inclined, different support frames need to be replaced, making the application range of the existing support frames small. Content of the Utility Model

[0004] The purpose of the utility model is to provide a support frame for subway station foundation pit construction to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A support frame for subway station foundation pit construction, including a bottom plate, the bottom plate is fixedly installed at the bottom of the foundation pit through a plurality of fixing bolts distributed on both sides thereof, two movable plates are arranged at the upper end of the bottom plate, and the top side walls of the two movable plates are connected through a hinge member. The bottoms of the two movable plates are respectively rotatably connected with sliders, and the two sliders are respectively slidably installed in the chutes opened on the bottom plate. An angle adjustment mechanism acting on the two movable plates is installed between the two movable plates at the upper end of the bottom plate. Support plates are respectively arranged on the side walls of the two movable plates away from each other, and the support plates and the movable plates are fixedly connected through a plurality of telescopic rods. An adjustment mechanism acting on the support plates is also installed on the movable plates.

[0006] As a further preferred of this technical solution, the plurality of telescopic rods are equally spaced.

[0007] As a further preferred of this technical solution, a plurality of fixing pins are fixedly installed on the support surfaces of the two support plates, and the plurality of fixing pins are arranged in multiple rows at equal intervals.

[0008] As a further preferred embodiment of the present technical solution, the adjusting mechanism includes a fixed rod, a movable block, a lead screw, and a motor. The fixed rod is fixedly connected to the side wall of the movable plate away from the other movable plate. The movable block is slidably installed in the movable groove opened in the fixed rod. A movable rod is fixedly connected to the side wall of the movable block away from the movable plate. The other end of the movable rod penetrates the side wall of the fixed rod and is fixedly connected to the side wall of the support plate. The lead screw is rotatably installed in the movable groove. One end of the lead screw penetrates the movable block and is inserted into the interior of the movable rod. The movable block is connected to the lead screw through a threaded fit. The other end of the lead screw extends into the interior of the movable plate and is fixedly connected to a driven bevel gear. The driven bevel gear is rotatably installed in the installation groove opened in the movable plate. The motor is fixedly installed on the side wall of the movable plate. The end of the output shaft of the motor is fixedly connected to a driving bevel gear. The driving bevel gear meshes with the driven bevel gear.

[0009] As a further preferred embodiment of the present technical solution, a fixed frame is also fixedly installed on the side wall of the movable plate. The output shaft of the motor is inserted into the bearing installed on the fixed frame.

[0010] As a further preferred embodiment of the present technical solution, the angle adjustment mechanism includes a cylinder. The cylinder is fixedly installed on the upper end of the bottom plate through a mounting frame. The end of the output shaft of the cylinder is fixedly connected to an adjustment rod. The two ends of the adjustment rod are respectively rotatably connected to a guide block. The two guide blocks are respectively slidably installed in the guide grooves opened in the two movable plates.

[0011] As a further preferred embodiment of the present technical solution, the length of the adjustment rod is greater than the length of the hinge member.

[0012] The present utility model provides a support frame for subway station foundation pit construction, which has the following beneficial effects:

[0013] Through the adjusting mechanism of the present utility model, the distance between the two support plates can be controlled, so that the total width of the support frame can be adjusted according to the requirements of different foundation pits. At the same time, when there is an inclination in the side wall of the foundation pit, the distance between the adjustment rod and the hinge member is controlled by controlling the length of the telescopic rod of the cylinder. When the adjustment member approaches the hinge member, the opening angle of the two movable plates will become larger, so that the inclination angle of the support plate is larger. On the contrary, the support plate will tend to be in a vertical state infinitely, so that the inclination angle of the support plate can be freely adjusted according to the side wall of the foundation pit. The support frame has a wide range of applications and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic cross-sectional view of the overall structure of the present utility model;

[0015] Figure 2 is the present utility model Figure 1 the schematic diagram of the structure of A in;

[0016] Figure 3 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 4 is a schematic diagram of the overall structure of the present utility model after angle adjustment;

[0018] In the figure: 1, bottom plate; 2, fixing bolt; 3, movable plate; 4, support plate; 5, adjusting rod; 6, telescopic rod; 7, slider; 8, chute; 9, cylinder; 10, mounting bracket; 11, fixing pin; 12, fixing rod; 13, movable rod; 14, movable block; 15, movable groove; 16, lead screw; 17, driven bevel gear; 18, driving bevel gear; 19, fixing frame; 20, motor; 21, guide groove; 22, guide block; 23, hinge. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0020] The present utility model provides a technical solution: as Figure 1 shown, in this embodiment, a support frame for the construction of a subway station foundation pit includes a bottom plate 1, and the bottom plate 1 is fixedly installed at the bottom of the foundation pit through a plurality of fixing bolts 2 distributed on both sides thereof. Two movable plates 3 are arranged at the upper end of the bottom plate 1, and the side walls of the tops of the two movable plates 3 are connected through a hinge 23 (here, the hinge 23 is a conventional component and will not be described in detail). Sliders 7 are rotatably connected to the bottoms of the two movable plates 3, and the two sliders 7 are respectively slidably installed in the chutes 8 opened on the bottom plate 1. An angle adjustment mechanism for acting on the two movable plates 3 is installed between the two movable plates 3 at the upper end of the bottom plate 1. Support plates 4 are respectively arranged on the side walls of the two movable plates 3 away from each other, and the support plates 4 and the movable plates 3 are fixedly connected through a plurality of telescopic rods 6. The plurality of telescopic rods 6 are equally spaced. An adjustment mechanism for acting on the support plate 4 is also installed on the movable plate 3.

[0021] Among them, a plurality of fixing pins 11 are fixedly installed on the support surfaces of the two support plates 4, and the plurality of fixing pins 11 are arranged in multiple rows at equal intervals.

[0022] By providing fixing pins on the support plate 4, when the support surface of the support plate 4 abuts against the side wall of the foundation pit, the plurality of fixing pins 11 will be inserted into the side wall of the foundation pit, which can make the support structure more stable.

[0023] Such as Figure 1 and Figure 2As shown in the figure, the adjusting mechanism includes a fixed rod 12, a movable block 14, a lead screw 16 and a motor 20. The fixed rod 12 is fixedly connected to the side wall of the movable plate 3 away from the other movable plate 3. The movable block 14 is slidably installed in the movable groove 15 formed in the fixed rod 12. A movable rod 13 is fixedly connected to the side wall of the movable block 14 away from the movable plate 3. The other end of the movable rod 13 penetrates the side wall of the fixed rod 12 and is fixedly connected to the side wall of the support plate 4. The lead screw 16 is rotatably installed in the movable groove 15. One end of the lead screw 16 penetrates the movable block 14 and is inserted into the interior of the movable rod 13. The movable block 14 is connected to the lead screw 16 by a threaded fit. The other end of the lead screw 16 extends into the interior of the movable plate 3 and is fixedly connected to a driven bevel gear 17. The driven bevel gear 17 is rotatably installed in the installation groove formed in the movable plate 3. The motor 20 is fixedly installed on the side wall of the movable plate 3. The end of the output shaft of the motor 20 is fixedly connected to a driving bevel gear 18. The driving bevel gear 18 meshes with the driven bevel gear 17.

[0024] By starting the motor 20, the motor 20 drives the driving bevel gear 18 to rotate, thereby driving the driven bevel gear 17 to rotate. The rotation of the driven bevel gear 17 causes the lead screw 16 to rotate. The rotation of the lead screw 16 causes the movable block 14 to slide in the movable groove 15, thereby driving the movable rod 13 to move synchronously, thereby controlling the distance between the support plate 4 and the movable plate 3. When in use, the total width of the support frame can be adjusted according to the requirements of different foundation pits.

[0025] Wherein, a fixed frame 19 is also fixedly installed on the side wall of the movable plate 3. The output shaft of the motor 20 is inserted into the bearing installed on the fixed frame 19.

[0026] Through the bearing on the fixed frame 19, the stability of the output shaft of the motor 20 is ensured, avoiding equipment failures caused by the shaking of the motor output shaft 20 after the motor 20 is started.

[0027] As Figure 1 and Figure 3 and Figure 4 As shown in the figure, the angle adjustment mechanism includes a cylinder 9. The cylinder 9 is fixedly installed on the upper end of the bottom plate 1 through a mounting frame 10. The end of the output shaft of the cylinder 9 is fixedly connected to an adjustment rod 5. The two ends of the adjustment rod 5 are respectively rotatably connected to guide blocks 22. The two guide blocks 22 are respectively slidably installed in the guide grooves 21 formed in the two movable plates 3.

[0028] By controlling the length of the telescopic rod of the cylinder 9 to drive the adjustment rod 5 to move up and down. When the adjustment rod 5 moves upward, the inclination angles of the two movable plates 3 will be larger, so that the inclination angle of the support plate 4 will be larger. On the contrary, the support plate 4 will tend to be in a vertical state, thereby achieving the purpose of controlling the inclination angle of the support plate 4.

[0029] Among them, the length of the adjusting rod 5 is greater than the length of the hinge member 23.

[0030] By making the length of the adjusting rod 5 greater than the length of the hinge member 23, when the adjusting member 5 is closer to the hinge member 23, the opening angle of the two movable plates 3 will be larger, so that the angle control mechanism can take effect.

[0031] The utility model provides a support frame for the construction of the foundation pit of a subway station, and the specific working principle is as follows:

[0032] In use, the total width of the support frame can be adjusted according to the requirements of different foundation pits. Specifically, start the motor 20, the motor 20 drives the driving bevel gear 18 to rotate, thereby driving the driven bevel gear 17 to rotate. The rotation of the driven bevel gear 17 causes the lead screw 16 to rotate, and the rotation of the lead screw 16 causes the movable block 14 to slide in the movable groove 15, thereby driving the movable rod 13 to move synchronously, so as to control the distance between the support plate 4 and the movable plate 3; when the side wall of the foundation pit is inclined, the length of the telescopic rod of the control cylinder 9 is used to drive the adjusting rod 5 to move up and down. When the adjusting rod 5 moves upward, since the length of the adjusting rod 5 is greater than the length of the hinge member 23, when the adjusting member 5 approaches the hinge member 23, the opening angle of the two movable plates 3 will become larger, so that the inclination angle of the support plate 4 is larger. On the contrary, the support plate 4 will tend to be in a vertical state infinitely, so as to achieve the purpose of controlling the inclination angle of the support plate 4.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A support frame for the construction of a subway station foundation pit, including a bottom plate (1), characterized in that: The bottom plate (1) is fixedly installed at the bottom of the foundation pit through a plurality of fixing bolts (2) distributed on both sides thereof. Two movable plates (3) are arranged at the upper end of the bottom plate (1). The top side walls of the two movable plates (3) are connected through a hinge (23). Sliders (7) are rotatably connected to the bottoms of the two movable plates (3). The two sliders (7) are respectively slidably installed in sliding grooves (8) formed in the bottom plate (1). An angle adjustment mechanism acting on the two movable plates (3) is installed between the two movable plates (3) at the upper end of the bottom plate (1). Support plates (4) are respectively arranged on the side walls of the two movable plates (3) away from each other. The support plates (4) and the movable plates (3) are fixedly connected through a plurality of telescopic rods (6). An adjustment mechanism acting on the support plates (4) is also installed on the movable plates (3).

2. The support frame for subway station foundation pit construction according to claim 1, characterized in that: The plurality of telescopic rods (6) are equidistantly distributed.

3. A bracing frame for subway station foundation pit construction according to claim 1, characterized in that: A plurality of fixing pins (11) are fixedly installed on the support surfaces of the two support plates (4). The plurality of fixing pins (11) are distributed in multiple rows at equal intervals.

4. A support frame for subway station foundation pit construction according to claim 1, characterized in that: The adjustment mechanism includes a fixed rod (12), a movable block (14), a lead screw (16) and a motor (20). The fixed rod (12) is fixedly connected to the side wall of the movable plate (3) away from the other movable plate (3). The movable block (14) is slidably installed in a movable groove (15) formed in the fixed rod (12). A movable rod (13) is fixedly connected to the side wall of the movable block (14) away from the movable plate (3). The other end of the movable rod (13) penetrates through the side wall of the fixed rod (12) and is fixedly connected to the side wall of the support plate (4). The lead screw (16) is rotatably installed in the movable groove (15). One end of the lead screw (16) penetrates through the movable block (14) and is inserted into the interior of the movable rod (13). The movable block (14) and the lead screw (16) are connected through a threaded fit. The other end of the lead screw (16) extends into the interior of the movable plate (3) and is fixedly connected to a driven bevel gear (17). The driven bevel gear (17) is rotatably installed in an installation groove formed in the movable plate (3). The motor (20) is fixedly installed on the side wall of the movable plate (3). The end of the output shaft of the motor (20) is fixedly connected to a driving bevel gear (18). The driving bevel gear (18) and the driven bevel gear (17) are meshed with each other.

5. A support frame for subway station foundation pit construction according to claim 4, characterized in that: A fixed frame (19) is also fixedly installed on the side wall of the movable plate (3). The output shaft of the motor (20) is inserted into a bearing installed in the fixed frame (19).

6. The support frame for subway station foundation pit construction according to claim 1, characterized in that: The angle adjustment mechanism includes a cylinder (9). The cylinder (9) is fixedly installed at the upper end of the bottom plate (1) through a mounting frame (10). The end of the output shaft of the cylinder (9) is fixedly connected to an adjustment rod (5). Guide blocks (22) are respectively rotatably connected to both ends of the adjustment rod (5). The two guide blocks (22) are respectively slidably installed in guide grooves (21) formed in the two movable plates (3).

7. A bracing frame for the construction of a subway station foundation pit according to claim 6, characterized in that: The length of the adjustment rod (5) is greater than the length of the hinge (23).

Images