An excavation device for a weathered sandstone subway station foundation pit

Abstract

The application discloses a kind of excavation equipment containing weathered sandstone subway station foundation pit, it is related to subway station foundation pit construction technical field, including vertical frame, rock-soil basket is installed between two enclosing frame in vertical frame, position switching assembly for driving extension arm relative enclosing frame rotation is installed in vertical frame, rock-soil basket is installed with the docking assembly connected with docking frame, the end of rotating abutment frame away from sliding frame is fixed with the support plate abutting with the side wall of rock-soil basket.The rock-soil of the rock-soil basket is collected in the process of subway station foundation pit excavation, lifting frame can be moved along with sliding frame and rotating abutment frame under the connection effect of docking assembly, greatly facilitate the rock-soil basket carrying rock-soil into between two enclosing frame, through the docking of lifting frame and rock-soil basket, by the transmission cooperation of traction chain and sprocket, rock-soil basket is vertically lifted, and the rock-soil in the process of subway station foundation pit excavation is stably and efficiently transported.

Description

Technical Field

[0001] This invention relates to the field of subway station foundation pit construction technology, specifically to an excavation device for subway station foundation pits containing weathered sandstone. Background Technology

[0002] An excavation pit is a pit dug at the foundation design location according to the base elevation and foundation plane dimensions. Before excavation, the excavation plan should be determined based on geological and hydrological data and the conditions of nearby buildings. Waterproofing and drainage work should be carried out. For shallow excavations, slope protection can be used to stabilize the soil slope. The slope should be determined according to relevant construction regulations.

[0003] The foundation pit of a subway station is a core component of subway station construction. It is mostly constructed using the open-cut method, which involves excavating a long, narrow, or rectangular deep trench on the ground according to the design outline. Foundation pit construction requires the completion of preliminary surveys, pipeline relocation, and traffic diversion, followed by the construction of the retaining structure and dewatering system. Subsequently, excavation is carried out in layers according to the principles of "layered, segmented, symmetrical, and time-limited closure," with timely installation of reinforced concrete or steel pipe supports.

[0004] When excavating subway station foundation pits containing weathered sandstone, current excavation equipment struggles to achieve stable and efficient transport of the soil and rock during the excavation process. This significantly restricts the excavation work and hinders the improvement of construction quality and efficiency. To address these shortcomings, this paper presents an excavation device for subway station foundation pits containing weathered sandstone to solve these problems. Summary of the Invention

[0005] The purpose of this invention is to provide an excavation device for subway station foundation pits containing weathered sandstone, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An excavation device for a subway station foundation pit containing weathered sandstone includes a frame, on which two symmetrically arranged retaining frames are fixed. A soil and rock basket located between the two retaining frames is installed on the frame. A horizontally arranged extension arm is rotatably installed on the retaining frames. A position switching component for driving the extension arm to rotate relative to the retaining frames is installed on the frame. A lifting frame is vertically slidably installed on the frame. An extension hole I is opened on the lifting frame. A fixing plate I is fixed on the soil and rock basket. A connecting column I vertically corresponding to the extension hole I is fixed at the bottom of the fixing plate I. A sliding frame is slidably installed on the extension arm. A docking frame is fixed on the sliding frame. A docking component connected to the docking frame is installed on the soil and rock basket. A rotating abutment frame is rotatably installed at the lower end of the sliding frame through a torsion component. A support plate that abuts against the side wall of the soil and rock basket is fixed at the end of the rotating abutment frame away from the sliding frame.

[0008] As an improvement of the present invention: a drive motor is fixed on the upright frame, a sprocket is coaxially fixed on the output shaft of the drive motor, a traction chain is drivenly connected to the sprocket, one end of the traction chain is fixed to the lifting frame, and the other end of the traction chain is fixed to a counterweight block that is slidably installed on the upright frame.

[0009] As an improvement of the present invention: a translation motor is fixed on the extension arm, and a threaded rod rotatably mounted on the extension arm is coaxially fixed to the output shaft of the translation motor. A sliding frame is threadedly sleeved on the threaded rod, and a guide frame that is horizontally slidably connected to the extension arm is fixed on the docking frame.

[0010] As an improvement of the present invention: the docking assembly includes a connecting seat fixed on the soil and rock basket, a vertically arranged connecting column II fixed at the bottom of the connecting seat, and an extension hole II provided on the docking frame for the connecting column II to be inserted and adapted.

[0011] As an improvement of the present invention: the torsion assembly includes an extension column fixed on the sliding frame, a rotating abutment frame rotatably mounted on the extension column, a torsion spring sleeved on the extension column, the two ends of the torsion spring being fixed on the sliding frame and the rotating abutment frame respectively, and the rotating abutment frame having a slot adapted to engage with the extension column.

[0012] As an improvement of the present invention: a fixing block is fixed to the rotating end of the rotating abutment frame, and a stop block that abuts against the fixing block is fixed on the sliding frame.

[0013] As an improvement of the present invention: the rotating end of the rotating abutment frame is also fixed with an L-shaped reset frame, the enclosure frame is fixed with a fixing plate II, and the fixing plate II is fixed with a push column that is horizontally corresponding to the reset frame.

[0014] As an improvement of the present invention: the position switching component includes an adjustment motor fixed on the upright, the output shaft of the adjustment motor is coaxially fixed with a threaded column, a threaded sleeve block is vertically slidably installed on the upright and threadedly sleeved on the threaded column, a suspension rod is fixed between the extension arm and the upright, and a traction rod is hinged between the suspension rod and the threaded sleeve block.

[0015] As an improvement of the present invention: a plurality of parallel guide rollers are rotatably mounted on the bottom of the upright frame, and a slope plate is rotatably mounted on the bottom edge of the upright frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention uses a soil and rock basket to collect soil and rock during the excavation of a subway station foundation pit. The lifting frame can move along with the sliding frame and the rotating abutment frame under the connection of the docking components, which greatly facilitates the soil and rock basket to carry the soil and rock into the space between the two enclosure frames. By docking the lifting frame with the soil and rock basket, and with the help of the transmission of the traction chain and sprocket, the soil and rock basket is lifted vertically upward. The soil and rock transportation during the excavation of the subway station foundation pit is stable and efficient.

[0018] 2. In this invention, the rotating abutment frame can reliably support the soil and rock basket during the horizontal conveying process. The set docking frame and the connecting column II are plugged into each other, which greatly improves the stability of the soil and rock basket conveying. After the soil and rock basket moves between the two enclosure frames, the push column pushes against the reset frame, so that the support plate separates from the soil and rock basket, realizing the rapid unlocking and switching of the soil and rock basket into the lifting stage. The soil and rock conveying efficiency of the subway station foundation pit excavation process is significantly improved. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 A structural diagram from a certain perspective;

[0021] Figure 3 For the present invention Figure 1 A structural diagram from another perspective;

[0022] Figure 4 For the present invention Figure 3 Enlarged diagram of section A in the middle;

[0023] Figure 5 This is a schematic diagram showing the connection of components such as the soil and rock basket, connecting seat, rotating abutment frame, docking frame, and sliding frame of the present invention.

[0024] Figure 6 For the present invention Figure 5A structural diagram from a certain perspective;

[0025] Figure 7 For the present invention Figure 6 A partial structural diagram;

[0026] Figure 8 This is a schematic diagram showing the connection of components such as the lifting frame, connecting column I, fixing plate, and soil basket of the present invention;

[0027] Figure 9 In this invention Figure 8 Exploded view of a partial structure;

[0028] Figure 10 This is a schematic diagram of the connection between the docking frame and the guide frame in this invention.

[0029] In the diagram: 1-Upright frame, 2-Drive motor, 3-Sprocket, 4-Traction chain, 5-Threaded column, 6-Adjusting motor, 7-Counterweight, 8-Threaded sleeve, 9-Traction rod, 10-Suspension tie rod, 11-Extension arm, 12-Lifting frame, 13-Soil basket, 14-Enclosure frame, 15-Sliding frame, 16-Translation motor, 17-Threaded rod, 18-Connecting column I, 19-Fixing plate I, 20-Connecting seat, 21-Dialing frame, 22-Rotating abutment frame, 23-Reset frame, 24-Connecting column II, 25-Fixing plate II, 26-Pushing column, 27-Slot, 28-Fixing block, 29-Stop block, 30-Torsion spring, 31-Extension hole I, 32-Guide frame, 33-Extension hole II, 34-Guide roller, 35-Slope plate, 36-Extension column, 37-Support plate. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore should not be construed as a limitation of the present invention.

[0031] First embodiment: Please refer to the appendix Figure 1 -Appendix Figure 10An excavation device for a subway station foundation pit containing weathered sandstone includes a frame 1, on which two symmetrically arranged retaining frames 14 are fixed. A soil and rock basket 13 located between the two retaining frames 14 is installed on the frame 1. A horizontally arranged extension arm 11 is rotatably installed on the retaining frames 14. A position switching component for driving the extension arm 11 to rotate relative to the retaining frames 14 is installed on the frame 1. A lifting frame 12 is vertically slidably installed on the frame 1. An extension hole 131 is opened on the lifting frame 12. A fixing plate I19 is fixed on the extension arm 13. A connecting column I18 corresponding vertically to the extension hole I31 is fixed at the bottom of the fixing plate I19. A sliding frame 15 is slidably installed on the extension arm 11. A docking frame 21 is fixed on the sliding frame 15. A docking assembly connected to the docking frame 21 is installed on the soil and rock basket 13. A rotating abutment frame 22 is rotatably installed at the lower end of the sliding frame 15 through a torsion assembly. A support plate 37 that abuts against the side wall of the soil and rock basket 13 is fixed at the end of the rotating abutment frame 22 away from the sliding frame 15.

[0032] When this excavation equipment is used for the excavation of a subway station foundation pit containing weathered sandstone, the extension arm 11 is adjusted to a horizontal state by the position switching component, and the sliding frame 15 slides horizontally relative to the extension arm 11. The extension arm 11 drives the docking component and the docking frame 21 to move, and the soil basket 13 is horizontally slid and adjusted from the initial position between the two retaining frames 14, so that the soil basket 13 can be moved to the excavation area, which facilitates the temporary storage of soil and rock during the construction process inside the soil basket 13. Then the soil basket 13 is moved between the two retaining frames 14 to achieve reset, and the lifting frame 12 drives the soil basket 13 to be lifted to the top of the foundation pit for unloading of soil and rock.

[0033] Specifically, a drive motor 2 is fixed on the upright frame 1, a sprocket 3 is coaxially fixed on the output shaft of the drive motor 2, a traction chain 4 is connected to the sprocket 3, one end of the traction chain 4 is fixed to the lifting frame 12, and a counterweight 7 is fixed to the other end of the traction chain 4 and slidably mounted on the upright frame 1.

[0034] The drive motor 2 drives the sprocket 3 to rotate, and the sprocket 3 drives the traction chain 4 to pull the lifting frame 12 vertically upward. During the lifting process, the connecting post I18 on the soil and rock basket 13 is inserted into the extension hole I31, thus realizing the docking of the lifting frame 12 and the soil and rock basket 13. Then the lifting frame 12 is pulled by the traction chain 4, realizing the stable upward movement of the soil and rock basket 13.

[0035] Specifically, a translation motor 16 is fixed on the extension arm 11. A threaded rod 17, rotatably mounted on the extension arm 11, is coaxially fixed to the output shaft of the translation motor 16. A sliding frame 15 is slidably sleeved on the threaded rod 17. A guide frame 32, which is horizontally slidably connected to the extension arm 11, is fixed on the docking frame 21. The translation motor 16 drives the threaded rod 17 to rotate, and the rotation of the threaded rod 17 drives the sliding frame 15 to slide. That is, the sliding frame 15 can drive the docking frame 21 and the docking assembly to move horizontally, thereby realizing the horizontal movement and transportation of the soil and rock basket 13.

[0036] The docking assembly includes a connecting seat 20 fixed on the soil and rock basket 13. A vertically arranged connecting column II24 is fixed at the bottom of the connecting seat 20. An extension hole II33 is provided on the docking frame 21 for the connecting column II24 to be inserted and adapted. Through the insertion and cooperation of the connecting column II24 and the docking frame 21, the stable translation of the soil and rock basket 13 is realized.

[0037] The sliding frame 15 moves the docking frame 21 and the soil and rock basket 13 between the two enclosure frames 14. The soil and rock basket 13 abuts against the lifting frame 12, and the extension hole I31 is vertically aligned with the connecting column I18. Then, the lifting frame 12 is pulled upward by the traction chain 4, which realizes the connection between the lifting frame 12 and the connecting column I18, and realizes the vertical lifting and transportation of the soil and rock basket 13 and the soil and rock inside it, which greatly improves the excavation and construction efficiency of the subway station foundation pit.

[0038] Second embodiment: Please refer to the appendix Figure 1 -Appendix Figure 10 In addition to the first embodiment, the torsion assembly includes an extension column 36 fixed on the sliding frame 15, a rotating abutment frame 22 rotatably mounted on the extension column 36, a torsion spring 30 sleeved on the extension column 36, the two ends of the torsion spring 30 being fixed on the sliding frame 15 and the rotating abutment frame 22 respectively, and a slot 27 adapted to engage with the extension column 36 on the rotating abutment frame 22.

[0039] During the process of transporting the soil and rock basket 13 between the two enclosure frames 14, the support plate 37 is installed and abuts against the soil and rock basket 13, which plays an effective supporting role for the soil and rock basket 13. This ensures that the soil and rock basket 13 filled with soil and rock has high stability during horizontal transport and ensures the smooth transport of soil and rock during the excavation construction.

[0040] The rotating end of the rotating abutment frame 22 is fixed with a fixing block 28, and the sliding frame 15 is fixed with a stop block 29 that abuts against the fixing block 28. The rotating end of the rotating abutment frame 22 is also fixed with an L-shaped reset frame 23, and the enclosure frame 14 is fixed with a fixing plate II 25. The fixing plate II 25 is fixed with a push column 26 that is horizontally corresponding to the reset frame 23.

[0041] When the rotating abutment frame 22 moves to the reset frame 23 above it and pushes against the push column 26, the reset frame 23 drives the rotating abutment frame 22 to rotate. At this time, the fixed block 28 no longer abuts against the stop block 29, and the end of the rotating abutment frame 22 away from the fixed block 28 separates from the soil and rock basket 13, thus unlocking the soil and rock basket 13. After that, the lifting frame 12 moves up and drives the soil and rock basket 13 to be lifted vertically. The soil and rock basket 13 moves and transports soil and rock smoothly and efficiently.

[0042] In addition, the position switching component of this device includes an adjustment motor 6 fixed on the upright 1, a threaded column 5 coaxially fixed to the output shaft of the adjustment motor 6, a threaded sleeve block 8 vertically slidably mounted on the upright 1 and threadedly sleeved on the threaded column 5, a suspension rod 10 fixed between the extension arm 11 and the upright 1, and a traction rod 9 hinged between the suspension rod 10 and the threaded sleeve block 8.

[0043] The adjusting motor 6 can drive the threaded column 5 to rotate, and the threaded column 5 drives the threaded sleeve block 8 to move vertically. At this time, the threaded sleeve block 8 can drive the suspension rod 10 to rotate through the traction rod 9. At this time, the suspension rod 10 drives the extension arm 11 to rotate from the vertical state to the horizontal state, which facilitates the horizontal sliding and conveying of the soil and rock basket 13. After the construction is completed, the adjusting extension arm 11 is reset to the vertical state to reduce the space occupied by the equipment and facilitate the overall position movement of the equipment, which can greatly improve the excavation efficiency of the subway station foundation pit.

[0044] In addition, several parallel guide rollers 34 are rotatably installed at the bottom of the upright frame 1, and a slope plate 35 is rotatably installed at the bottom edge of the upright frame 1. During the process of the soil and rock basket 13 moving between the two enclosure frames 14, the slope plate 35 helps to improve the overall support stability of the equipment, and the guide rollers 34 play a role in guiding and supporting the stability of the movement of the soil and rock basket 13, thereby improving the smoothness of the horizontal movement of the soil and rock basket 13 and the conveying of soil and rock.

[0045] In summary, this invention uses a soil and rock basket 13 to collect soil and rock during the excavation of a subway station foundation pit. The lifting frame 12 can move along with the sliding frame 15 and the rotating abutment frame 22 under the connection of the docking components, which greatly facilitates the soil and rock basket 13 carrying soil and rock into the space between the two enclosure frames 14. By docking the lifting frame 12 with the soil and rock basket 13, and with the transmission cooperation of the traction chain 4 and the sprocket 3, the soil and rock basket 13 is lifted vertically upward. The soil and rock transportation during the excavation of the subway station foundation pit is stable and efficient. In this invention, the rotating abutment frame 22 can reliably support the soil and rock basket 13 during horizontal conveying. The set docking frame 21 is plugged into and adapted to the connecting column II 24, which greatly improves the stability of conveying the soil and rock basket 13. After the soil and rock basket 13 moves between the two enclosure frames 14, the push column 26 pushes against the reset frame 23, causing the support plate 37 to separate from the soil and rock basket 13, realizing the rapid unlocking and switching of the soil and rock basket 13 into the lifting stage. The soil and rock conveying efficiency of the subway station foundation pit excavation process is significantly improved.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An excavation device for a foundation pit of a subway station containing weathered sandstone, comprising a stand (1), two enclosing frames (14) symmetrically arranged are fixed on the stand (1), characterized in that, A soil and rock basket (13) is installed on the upright frame (1) between the two enclosure frames (14). A horizontally arranged extension arm (11) is rotatably installed on the enclosure frame (14). A position switching component for driving the extension arm (11) to rotate relative to the enclosure frame (14) is installed on the upright frame (1). A lifting frame (12) is vertically slidably installed on the upright frame (1). An extension hole I (31) is opened on the lifting frame (12). A fixing plate is fixed on the soil and rock basket (13). I (19), the bottom of the fixed plate I (19) is fixed with a connecting column I (18) vertically corresponding to the extension hole I (31), a sliding frame (15) is slidably installed on the extension arm (11), a docking frame (21) is fixed on the sliding frame (15), a docking assembly connected to the docking frame (21) is installed on the soil basket (13), and a rotating abutment frame (22) is rotatably installed at the lower end of the sliding frame (15) through a torsion assembly, and the rotating abutment frame (22) is away from the sliding frame (15). One end is fixed with a support plate (37) that abuts against the side wall of the soil and rock basket (13). The torsion assembly includes an extension column (36) fixed on the sliding frame (15). The rotating abutment frame (22) is rotatably mounted on the extension column (36). A torsion spring (30) is sleeved on the extension column (36). The two ends of the torsion spring (30) are respectively fixed on the sliding frame (15) and the rotating abutment frame (22). The rotating abutment frame (22) has a groove for connecting with the extension column (13). The column (36) is engaged with the matching slot (27). The rotating end of the rotating abutment frame (22) is fixed with a fixing block (28). The sliding frame (15) is fixed with a stop block (29) that abuts against the fixing block (28). The rotating end of the rotating abutment frame (22) is also fixed with an L-shaped reset frame (23). The enclosure frame (14) is fixed with a fixing plate II (25). The fixing plate II (25) is fixed with a push column (26) that is horizontally corresponding to the reset frame (23).

2. The excavation equipment for a subway station foundation pit containing weathered sandstone according to claim 1, characterized in that, A drive motor (2) is fixed on the upright frame (1). A sprocket (3) is coaxially fixed on the output shaft of the drive motor (2). A traction chain (4) is connected to the sprocket (3). One end of the traction chain (4) is fixed to the lifting frame (12). The other end of the traction chain (4) is fixed to a counterweight (7) that is slidably installed on the upright frame (1).

3. The excavation equipment for a subway station foundation pit containing weathered sandstone according to claim 1, characterized in that, A translation motor (16) is fixed on the extension arm (11). The output shaft of the translation motor (16) is coaxially fixed with a threaded rod (17) rotatably mounted on the extension arm (11). The sliding frame (15) is threaded onto the threaded rod (17). A guide frame (32) that is horizontally slidably connected to the extension arm (11) is fixed on the docking frame (21).

4. The excavation equipment for a subway station foundation pit containing weathered sandstone according to claim 1, characterized in that, The docking assembly includes a connecting seat (20) fixed on the soil and rock basket (13), and a vertically arranged connecting column II (24) is fixed at the bottom of the connecting seat (20). The docking frame (21) is provided with an extension hole II (33) for the connecting column II (24) to be inserted and adapted.

5. The excavation equipment containing the weathered sandstone subway station foundation pit according to claim 1, characterized in that, The position switching component includes an adjustment motor (6) fixed on the upright (1), a threaded column (5) coaxially fixed to the output shaft of the adjustment motor (6), a threaded sleeve block (8) threadedly sleeved on the threaded column (5) and vertically slidably mounted on the upright (1), a suspension rod (10) fixed between the extension arm (11) and the upright (1), and a traction rod (9) hinged between the suspension rod (10) and the threaded sleeve block (8).

6. The excavation equipment for a subway station foundation pit containing weathered sandstone according to claim 1, characterized in that, The bottom of the support frame (1) is rotatably equipped with several parallel guide rollers (34), and the bottom edge of the support frame (1) is rotatably equipped with a slope plate (35).

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