Detachable supporting device for red sandstone layer foundation pit

Abstract

The invention relates to the technical field of foundation pit supporting, and discloses a detachable supporting device for a red sandstone layer foundation pit. The mounting seat is fixedly mounted on the top surface of the bottom plate; the supporting plate is hinged to the inner side wall of the mounting seat; the supporting plate is hinged to the end, away from the mounting base, of the supporting plate. The four reinforcing cylinders are fixedly mounted at four corners of the bottom surface of the bottom plate respectively; the four driving shafts are rotationally mounted on the inner bottom surfaces of the four reinforcing cylinders respectively; through the design of the pressing air bag ring and the sealing air bag ring, the gap between the reinforcing cylinder and the hole is effectively blocked, when the bottom plate is fixed to the bottom face of the foundation pit through the reinforcing cylinder, the pressing air bag ring is extruded, air in the pressing air bag ring enters the sealing air bag ring through the guide pipe, and the sealing air bag ring expands and is tightly attached to the inner wall of the hole; water is effectively prevented from permeating into the holes, so that the strength of the inner walls of the holes is protected, and the overall sealing performance and stability are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, and in particular to a detachable support device for a red sandstone foundation pit. Background Art

[0002] Red sandstone is a common sedimentary rock, known for its unique red color and relatively low hardness. Its Mohs hardness is usually between 2.0 and 3.0, which is lower than common stones such as marble and granite. This lower hardness limits the application of red sandstone in the fields of architecture and sculpture, especially in situations where load-bearing or long-term durability is required.

[0003] The Chinese patent with announcement number CN117626995A discloses an assembled foundation pit support structure and a support method thereof, including a support plate, an abutment assembly and a support assembly, wherein an abutment assembly is provided on one side of the support plate, and a support assembly is provided on the other side of the support plate, and the support assembly is used to support the entire support structure, and through a slidable support rod, the overall support length and support angle of the support structure can be adjusted according to actual conditions, thereby improving the scope of application of the support structure, and the abutment assembly is used to support the side wall of the foundation pit, so that the abutment assembly can be closely attached to the side wall of the foundation pit, avoiding the formation of a gap between the abutment assembly and the side wall of the foundation pit, greatly improving the stability of the support, reducing safety hazards, and using a locking rod to avoid ratchet reversal. This application solves the problem that the foundation pit support is difficult to be closely attached to the side wall of the foundation pit, which seriously affects the stability of the foundation pit support. However, this solution still has the following shortcomings when it is actually used: When red sandstone encounters water infiltration, the stability of its internal structure will decrease significantly, resulting in a significant reduction in the strength of the rock. As an effective means of fixing the support device, the expansion sleeve is usually designed to be inserted into the inner bottom surface of the foundation pit, and the expansion mechanism of the sleeve is closely combined with the surrounding rock and soil, thereby achieving the purpose of stabilizing the support device. However, during periods of continuous rainfall such as the plum rain season, rainwater may penetrate into the foundation pit through various channels, including through the holes left after the expansion sleeve is inserted. Once these holes are invaded by water, the weakening effect of the red sandstone base after encountering water will be triggered, which may not only weaken the bonding force between the sleeve and the rock and soil, but also cause the rock and soil itself to loosen, which will seriously affect the overall firmness of the support device and the safety and stability of the foundation pit.

[0004] Therefore, it is necessary to design a detachable supporting device for red sandstone foundation pit to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a detachable supporting device for a red sandstone foundation pit.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A detachable supporting device for a red sandstone foundation pit, comprising: Base plate; A mounting base, fixedly mounted on the top surface of the base plate; A support plate, hinged to the inner side wall of the mounting seat; A supporting plate, hinged to one end of the support plate away from the mounting seat; Four reinforcement cylinders are respectively fixedly mounted at the four corners of the bottom surface of the bottom plate; Four driving shafts are rotatably mounted on the inner bottom surfaces of the four reinforcement cylinders, respectively, and the top ends of the driving shafts pass through the bottom plate; A plurality of openings are symmetrically provided on the outer walls of the four reinforcement tubes; Four sets of sealing structures are respectively arranged between the bottom surface of the bottom plate and the four reinforcement cylinders; Four driving motors are fixedly mounted at the four corners of the top surface of the bottom plate, and the output ends of the driving motors are fixedly connected to the top ends of the driving shafts; A plurality of fixing plates are respectively fixedly mounted on the inner side wall of the reinforcement tube at a position below the through opening; A plurality of transmission components are respectively arranged between the fixing plate and the driving shaft; A plurality of connecting frames are respectively fixedly mounted on the bottom surfaces of a plurality of the fixing plates; A plurality of propulsion assemblies are respectively arranged at the ends of a plurality of the connecting frames; A plurality of groups of rotary drilling assemblies are respectively arranged on the top surfaces of a plurality of the fixing plates.

[0007] As a preferred technical solution of the present invention, the sealing structure includes: an annular groove, provided on the bottom surface of the bottom plate; Press the airbag ring to fix it on the inner wall of the annular groove; An outer ring groove is provided on the outer surface wall of the top end of the reinforcement tube; A sealing airbag ring, fixedly mounted on the inner side wall of the outer ring groove; The catheter is arranged between the pressing airbag ring and the sealing airbag ring, and two ends of the catheter are respectively connected with the pressing airbag ring and the sealing airbag ring.

[0008] As a preferred technical solution of the present invention, the annular groove and the reinforcement tube are coaxially arranged.

[0009] As a preferred technical solution of the present invention, the transmission assembly includes: A slide groove is provided on the top surface of the fixed plate; A slide bracket, slidably mounted on the inner wall of the slide groove; A circular plate fixedly mounted on the top surface of the slide; A fixed bevel gear ring, fixedly sleeved on the outer wall of the driving shaft; A bracket, fixedly mounted on the bottom surface of the fixing plate; A gear rod, rotatably mounted on a side of the bracket; A driven bevel gear is fixedly mounted on an end of the gear rod away from the bracket, and the driven bevel gear is meshed with the fixed bevel gear ring; A rotating shaft, rotatably mounted on a side of the slide; A connecting gear is fixedly mounted on one end of the rotating shaft away from the sliding frame, and the connecting gear is meshed with the gear rod.

[0010] As a preferred technical solution of the present invention, the bottom surface of the slide bracket is in contact with the top surface of the fixing plate, and the connecting gear is located directly above the gear rod.

[0011] As a preferred technical solution of the present invention, the propulsion assembly includes: A fixed sleeve, fixedly mounted on an end of the connecting frame away from the fixed plate; Two guide grooves are symmetrically arranged on the inner side wall of the fixed sleeve; A propulsion screw, arranged inside the fixed sleeve; Two guide blocks are symmetrically fixedly mounted on the ends of the advancing screw, and the guide blocks are slidably connected to the guide grooves; A threaded sleeve is rotatably mounted on the end of the fixed sleeve and is threadedly connected to the advancing screw; The propulsion frame is fixedly mounted on one end of the propulsion screw rod located outside the fixed sleeve, and one end of the propulsion frame away from the propulsion screw rod is fixedly connected to the slide frame.

[0012] As a preferred technical solution of the present invention, the outer diameter of the threaded sleeve is at least greater than the outer diameter of the fixed sleeve, and the threaded sleeve is connected to the gear rod through a synchronous belt transmission.

[0013] As a preferred technical solution of the present invention, the rotary drilling assembly comprises: A rotating seat, rotatably mounted on the side of the circular plate; A rotating sleeve is fixedly mounted on the side of the rotating seat; An electric push rod, fixedly mounted on the inner wall of the rotating sleeve; A transmission shaft is rotatably mounted on the side of the circular plate, and an end of the transmission shaft passes through the circular plate and is fixedly connected to the rotating seat; A transmission gear is fixedly mounted on an end of the transmission shaft away from the circular plate, and the transmission gear is meshed with the connecting gear; The adjusting mechanism is arranged on the rotating sleeve.

[0014] As a preferred technical solution of the present invention, the adjustment mechanism includes: A plurality of guide openings are distributed in a circular array and are opened at one end of the rotating sleeve away from the rotating seat; A plurality of slide plates are slidably mounted on the inner side walls of the plurality of guide openings, and one end of the slide plate located on the inner side of the rotating sleeve is fixedly connected to the telescopic end of the electric push rod; A plurality of adjustment rods are distributed in a circular array and hinged on the side of the rotating seat; A plurality of transmission rods are respectively hinged between a plurality of the adjusting rods and the slide plate.

[0015] As a preferred technical solution of the present invention, the end of the rotating sleeve away from the rotating seat is configured to be conical, and the adjusting rod, the transmission rod and the rotating sleeve are all made of high-strength metal material.

[0016] The present invention has the following beneficial effects: 1. By setting the reinforcement tube and the sealing structure, and by designing the pressing airbag ring and the sealing airbag ring, the gap between the reinforcement tube and the hole is effectively blocked. When the bottom plate is fixed to the bottom surface of the foundation pit through the reinforcement tube, the pressing airbag ring is squeezed, and the gas inside it enters the sealing airbag ring through the conduit, so that the sealing airbag ring expands and fits tightly to the inner wall of the hole, effectively preventing moisture from penetrating into the hole, thereby protecting the strength of the inner wall of the hole and enhancing the overall sealing and stability; 2. By setting up the transmission assembly and the propulsion assembly, the four drive motors are turned on synchronously to drive the drive shaft to rotate, and the power is transmitted to the threaded sleeve through the transmission, thereby driving the propulsion screw to slide out along the fixed sleeve, ensuring the stability and controllability of the propulsion process. In practical applications, this propulsion mechanism can respond to operating instructions quickly and accurately, and smoothly push the rotary drilling assembly to the predetermined position, greatly improving the operating efficiency; 3. By setting up the transmission assembly and the rotary drilling assembly, the rotary drilling assembly realizes the linkage with the drive system through the meshing of the connecting gear and the transmission gear. With the sliding of the slide and the circular plate, and the rotation of the rotating seat and the rotating sleeve, the adjusting rod and the transmission rod perform precise rotary drilling operations on the inner wall of the hole. After the rotary drilling is completed, the electric push rod is shortened to drive the slide plate to slide, and the transmission rod and the adjusting rod are lifted and expanded to further reinforce the base plate. This precise rotary drilling reinforcement method not only enhances the stability of the base plate, but also improves the safety and reliability of the entire support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a detachable supporting device for a red sandstone foundation pit proposed by the present invention; Figure 2 A three-dimensional multi-angle structural schematic diagram of a detachable supporting device for a red sandstone foundation pit proposed by the present invention; Figure 3 A schematic diagram of the reinforcement tube structure of a detachable supporting device for a red sandstone foundation pit proposed by the present invention; Figure 4 for Figure 2 The enlarged structural diagram at A in the middle; Figure 5 A schematic diagram of the internal structure of a reinforcement tube of a detachable supporting device for a red sandstone foundation pit proposed by the present invention; Figure 6 A schematic diagram of the partial internal structure of a reinforcement tube of a detachable supporting device for a red sandstone foundation pit proposed by the present invention; Figure 7 A schematic diagram of a partial cross-section structure of a propulsion assembly of a detachable supporting device for a red sandstone foundation pit proposed by the present invention; Figure 8 This is a schematic diagram of the partial cross-section structure of a rotary drilling assembly of a detachable supporting device for a red sandstone foundation pit proposed by the present invention.

[0018] In the figure: 1, bottom plate; 2, mounting seat; 3, support plate; 4, support plate; 5, reinforcement tube; 6, drive shaft; 7, through port; 81, annular groove; 82, pressing airbag ring; 83, outer ring groove; 84, sealing airbag ring; 85, guide tube; 9, drive motor; 10, fixed plate; 111, slide groove; 112, slide; 113, round plate; 114, fixed bevel gear ring; 115, bracket; 116, gear rod; 117, driven bevel gear ; 118, rotating shaft; 119, connecting gear; 12, connecting frame; 131, fixed sleeve; 132, guide groove; 133, pushing screw; 134, guide block; 135, threaded sleeve; 136, pushing frame; 141, rotating seat; 142, rotating sleeve; 143, electric push rod; 144, guide port; 145, slide plate; 146, adjusting rod; 147, transmission rod; 148, transmission shaft; 149, transmission gear. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-8 A detachable supporting device for a red sandstone foundation pit comprises a bottom plate 1; a mounting seat 2, fixedly mounted on the top surface of the bottom plate 1; a support plate 3, hinged on the inner side wall of the mounting seat 2; a supporting plate 4, hinged on the end of the support plate 3 away from the mounting seat 2; four reinforcing cylinders 5, respectively fixedly mounted at the four corners of the bottom surface of the bottom plate 1; four driving shafts 6, respectively rotatably mounted on the inner bottom surfaces of the four reinforcing cylinders 5, and the top ends of the driving shafts 6 pass through the bottom plate 1; a plurality of through openings 7, symmetrically opened on the outer walls of the four reinforcing cylinders 5; four sets of sealing structures, respectively arranged between the bottom surface of the bottom plate 1 and the four reinforcing cylinders 5; four driving motors 9, respectively fixedly mounted at the four corners of the top surface of the bottom plate 1, and the output ends of the driving motors 9 are fixedly connected to the top ends of the driving shafts 6; a plurality of fixed Plates 10 are fixedly mounted on the inner wall of the reinforcement tube 5 below the through opening 7; several groups of transmission components are respectively arranged between the fixed plate 10 and the drive shaft 6; several connecting frames 12 are respectively fixedly mounted on the bottom surfaces of several fixed plates 10; several groups of propulsion components are respectively arranged at the ends of several connecting frames 12; several groups of rotary drilling components are respectively arranged on the top surfaces of several fixed plates 10; when in use, the bottom plate 1 can be fixed to the bottom surface of the foundation pit through the reinforcement tube 5, and under the support of the support plate 3, the support plate 4 can be fitted with the inner wall of the foundation pit, thereby realizing the support of the foundation pit. When fixing the bottom plate 1, the installation position of the reinforcement tube 5 can be punched first, and then the reinforcement tube 5 on the bottom plate 1 can be inserted into the hole.

[0021] Reference Figure 2 , Figure 3, Figure 4 The sealing structure includes: an annular groove 81, which is provided on the bottom surface of the bottom plate 1, and the annular groove 81 is coaxially arranged with the reinforcement tube 5; a pressing airbag ring 82, which is fixedly installed on the inner side wall of the annular groove 81; an outer annular groove 83, which is provided on the outer surface wall of the top end of the reinforcement tube 5; a sealing airbag ring 84, which is fixedly installed on the inner side wall of the outer annular groove 83; a conduit 85, which is provided between the pressing airbag ring 82 and the sealing airbag ring 84, and the two ends of the conduit 85 are respectively connected with the pressing airbag ring 82 and the sealing airbag ring 84; when the bottom plate 1 contacts the bottom surface of the foundation pit during the insertion of the reinforcement tube 5, the pressing airbag ring 82 in the annular groove 81 can be squeezed, and when the pressing airbag ring 82 is squeezed, the gas inside the pressing airbag ring 82 can enter the sealing airbag ring 84 in the outer annular groove 83 through the conduit 85, so that the sealing airbag ring 84 expands to block the gap between the hole and the reinforcement tube 5, so as to prevent water from penetrating into the hole and affecting the strength of the inner wall of the hole.

[0022] Reference Figure 5 , Figure 6 The transmission assembly includes: a slide 111, which is opened on the top surface of the fixed plate 10; a slide 112, which is slidably mounted on the inner side wall of the slide 111, and the bottom surface of the slide 112 is in contact with the top surface of the fixed plate 10; a circular plate 113, which is fixedly mounted on the top surface of the slide 112; a fixed bevel gear ring 114, which is fixedly sleeved on the outer wall of the drive shaft 6; a bracket 115, which is fixedly mounted on the bottom surface of the fixed plate 10; a gear rod 116, which is rotatably mounted on the side of the bracket 115; a driven bevel gear 117, which is fixedly mounted on the end of the gear rod 116 away from the bracket 115, and the driven bevel gear 117 is meshed with the fixed bevel gear ring 114; a rotating shaft 118, which is rotatably mounted On the side of the slide 112; a connecting gear 119 is fixedly mounted on the end of the rotating shaft 118 away from the slide 112, and the connecting gear 119 is meshed with the gear rod 116, and the connecting gear 119 is located directly above the gear rod 116; the four driving motors 9 are synchronously turned on to drive the driving shaft 6 to rotate. When the driving shaft 6 rotates, the fixed bevel gear ring 114 on the driving shaft 6 is meshed with the driven bevel gear 117, thereby driving the driven bevel gear 117 and the gear rod 116 to rotate. In the process of the slide 112 and the circular plate 113 sliding along the slide groove 111 through the through opening 7, the rotation of the gear rod 116 can synchronously drive the connecting gear 119 to rotate.

[0023] Reference Figure 5 , Figure 7The propulsion assembly includes: a fixed sleeve 131, fixedly mounted on the end of the connecting frame 12 away from the fixed plate 10; two guide grooves 132, symmetrically opened on the inner wall of the fixed sleeve 131; a propulsion screw 133, arranged inside the fixed sleeve 131; two guide blocks 134, symmetrically fixedly mounted on the ends of the propulsion screw 133, and the guide blocks 134 are slidably connected to the guide grooves 132; a threaded sleeve 135, rotatably mounted on the end of the fixed sleeve 131, and the threaded sleeve 135 is threadedly connected to the propulsion screw 133, the outer diameter of the threaded sleeve 135 is at least larger than the outer diameter of the fixed sleeve 131, and the threaded sleeve 135 is connected to the gear rod 116 through a synchronous belt transmission; a propulsion frame 136, fixedly mounted The advancing screw 133 is located at one end outside the fixed sleeve 131, and the advancing frame 136 is fixedly connected to the slide 112 at one end away from the advancing screw 133; when the gear rod 116 rotates, the threaded sleeve 135 can be driven to rotate through the synchronous belt. Since the advancing screw 133 is slidably connected to the fixed sleeve 131 through the guide block 134 and the guide groove 132, and the advancing screw 133 and the threaded sleeve 135 are threadedly connected, when the threaded sleeve 135 rotates, the advancing screw 133 can be driven to slide along the fixed sleeve 131 and extend out of the fixed sleeve 131, thereby pushing the slide 112 to slide along the slide groove 111 on the top surface of the fixed plate 10 through the advancing frame 136, so that the rotary drill assembly gradually extends out of the reinforcement tube 5 through the through opening 7.

[0024] Reference Figure 5 , Figure 8 The rotary drilling assembly includes: a rotating seat 141, which is rotatably mounted on the side of the circular plate 113; a rotating sleeve 142, which is fixedly mounted on the side of the rotating seat 141, and the end of the rotating sleeve 142 away from the rotating seat 141 is set to a cone; an electric push rod 143, which is fixedly mounted on the inner side wall of the rotating sleeve 142; a transmission shaft 148, which is rotatably mounted on the side of the circular plate 113, and the end of the transmission shaft 148 passes through the circular plate 113 and is fixedly connected to the rotating seat 141; a transmission gear 149, which is fixedly mounted on the end of the transmission shaft 148 away from the circular plate 113, and the transmission gear 149 is meshed with the connecting gear 119; an adjusting mechanism is arranged on the rotating sleeve 142; the connecting gear 119 is meshed with the transmission gear 149, and can drive the transmission gear 149 and the transmission shaft 148 to rotate, so that the rotating seat 141 and the rotating sleeve 142 are driven to rotate.

[0025] Reference Figure 8The adjustment mechanism includes: a plurality of guide openings 144, which are arranged in a circular array and are opened at one end of the rotating sleeve 142 away from the rotating seat 141; a plurality of slide plates 145, which are respectively slidably mounted on the inner side walls of the plurality of guide openings 144, and one end of the slide plate 145 located on the inner side of the rotating sleeve 142 is fixedly connected to the telescopic end of the electric push rod 143; a plurality of adjustment rods 146, which are arranged in a circular array and are hinged on the side of the rotating seat 141; a plurality of transmission rods 147, which are respectively hinged between the plurality of adjustment rods 146 and the slide plates 145, and the adjustment rods 146, the transmission rods 147 and the rotating sleeve 142 are all made of high-strength metal material; with the rotation of the rotating sleeve 142 and the advancement of the slide 112, the inner wall of the hole can be drilled through the adjusting rod 146 and the transmission rod 147 during the rotation of the rotating sleeve 142, so that the entire drilling assembly enters the inner wall of the hole to further reinforce the bottom plate 1, and after the entire drilling assembly enters the inner wall of the hole, the electric push rod 143 can be shortened to drive the slide plate 145 to slide along the guide port 144, so that the transmission rod 147 and the adjusting rod 146 can be lifted up, so that the adjusting rod 146 and the transmission rod 147 are expanded to achieve fixation, thereby further improving the stability of the bottom plate 1.

[0026] The specific working principle of the present invention is as follows: When in use, the bottom plate 1 can be fixed to the bottom surface of the foundation pit through the reinforcement tube 5. Under the support of the support plate 3, the support plate 4 can fit with the inner wall of the foundation pit, so as to support the foundation pit. When fixing the bottom plate 1, the installation position of the reinforcement tube 5 can be punched first, and then the reinforcement tube 5 on the bottom plate 1 can be inserted into the hole. During the insertion of the reinforcement tube 5, when the bottom plate 1 contacts the bottom surface of the foundation pit, the pressing airbag ring 82 in the annular groove 81 can be squeezed. When the pressing airbag ring 82 is squeezed, the gas inside it can enter the sealing airbag ring 84 in the outer ring groove 83 through the conduit 85, so that the sealing airbag ring 84 expands to block the gap between the hole and the reinforcement tube 5, so as to prevent water from penetrating into the hole and affecting the strength of the inner wall of the hole. After the reinforcement cylinder 5 and the base plate 1 are installed, the four driving motors 9 can be synchronously turned on to drive the driving shaft 6 to rotate. When the driving shaft 6 rotates, the fixed bevel gear ring 114 on the driving shaft 6 is meshed with the driven bevel gear 117, so that the driven bevel gear 117 and the gear rod 116 can be driven to rotate. When the gear rod 116 rotates, the threaded sleeve 135 can be driven to rotate through the synchronous belt. Since the advancing screw 133 is slidably connected with the fixed sleeve 131 through the guide block 134 and the guide groove 132, and the advancing screw 133 and the threaded sleeve 135 are screwed, when the threaded sleeve 135 rotates, the advancing screw 133 can be driven to slide along the fixed sleeve 131 and extend out of the fixed sleeve 131, so that the slide 112 is pushed by the advancing frame 136 to slide along the slide groove 111 on the top surface of the fixed plate 10, so that the rotary drill assembly gradually extends out of the reinforcement cylinder 5 through the through opening 7; When the slide 112 and the circular plate 113 slide along the slide groove 111 through the through opening 7, the rotation of the gear rod 116 can synchronously drive the connecting gear 119 to rotate, and the connecting gear 119 meshes with the transmission gear 149, thereby driving the transmission gear 149 and the transmission shaft 148 to rotate, so that the rotating seat 141 and the rotating sleeve 142 are driven to rotate. With the rotation of the rotating sleeve 142 and the advancement of the slide 112, the inner wall of the hole can be drilled by the adjusting rod 146 and the transmission rod 147 during the rotation of the rotating sleeve 142, so that the entire drilling assembly enters the inner wall of the hole to further reinforce the bottom plate 1, and after the entire drilling assembly enters the inner wall of the hole, the electric push rod 143 can be shortened to drive the slide plate 145 to slide along the guide opening 144, so that the transmission rod 147 and the adjusting rod 146 can be lifted up, so that the adjusting rod 146 and the transmission rod 147 are expanded to achieve fixation, thereby further improving the stability of the bottom plate 1.

Claims

1. A detachable supporting device for a red sandstone foundation pit, characterized in that: The invention comprises a bottom plate (1), a mounting seat (2) being fixedly mounted on the top surface of the bottom plate (1), a support plate (3) being hingedly mounted on the inner side wall of the mounting seat (2), and a support plate (4) being hingedly mounted on one end of the support plate (3) away from the mounting seat (2); reinforcement cylinders (5) being fixedly mounted on the four corners of the bottom surface of the bottom plate (1), a plurality of through openings (7) being symmetrically formed on the outer wall of the reinforcement cylinder (5), and a plurality of fixing plates (10) being fixedly mounted on the inner side wall of the reinforcement cylinder (5) below the through openings (7); and the inner bottom surface of the reinforcement cylinder (5) being hingedly mounted on the inner side wall of the reinforcement cylinder (5). A driving shaft (6) is dynamically installed, and the top end of the driving shaft (6) passes through the bottom plate (1); the top end of the driving shaft (6) is connected to a driving motor (9) arranged on the top surface of the bottom plate (1); a plurality of transmission components are arranged between the driving shaft (6) and the fixed plate (10); a connecting frame (12) is fixedly installed on the bottom surface of the fixed plate (10); a propulsion component is arranged at the end of the connecting frame (12); a rotary drilling component is arranged on the top surface of the fixed plate (10); and a sealing structure is arranged between the bottom surface of the bottom plate (1) and each reinforcement cylinder (5).

2. The detachable supporting device for a red sandstone foundation pit according to claim 1 is characterized in that: The sealing structure comprises an annular groove (81) formed on the bottom surface of the bottom plate (1), and a pressing airbag ring (82) is fixedly mounted on the inner side wall of the annular groove (81); an outer annular groove (83) is formed on the outer side wall of the top end of the reinforcement tube (5), and a sealing airbag ring (84) is fixedly mounted on the inner side wall of the outer annular groove (83), and the sealing airbag ring (84) is connected to the pressing airbag ring (82) via a conduit (85).

3. The detachable supporting device for a red sandstone foundation pit according to claim 2 is characterized in that: The annular groove (81) and the reinforcement tube (5) are coaxially arranged.

4. The detachable supporting device for a red sandstone foundation pit according to claim 1 is characterized in that: The transmission assembly comprises a slide groove (111) provided on the top surface of the fixed plate (10); a slide frame (112) is slidably mounted on the inner side wall of the slide groove (111); a circular plate (113) is fixedly mounted on the top surface of the slide frame (112); a rotating shaft (118) is rotatably mounted on the side surface of the slide frame (112); a connecting gear (119) is fixedly mounted on the end of the rotating shaft (118) away from the slide frame (112); a bracket (115) is fixedly mounted on the bottom surface of the fixed plate (10); a gear rod (116) is rotatably mounted on the side surface of the bracket (115); the gear rod (116) is meshed with the connecting gear (119); a driven bevel gear (117) is fixedly mounted on the end of the gear rod (116) away from the bracket (115); and the driven bevel gear (117) is meshed with a fixed bevel gear ring (114) fixedly sleeved on the outer wall of the drive shaft (6).

5. The detachable supporting device for a red sandstone foundation pit according to claim 4 is characterized in that: The bottom surface of the sliding frame (112) is in contact with the top surface of the fixing plate (10), and the connecting gear (119) is located directly above the gear rod (116).

6. The detachable supporting device for a red sandstone foundation pit according to claim 4 is characterized in that: The propulsion assembly comprises a fixed sleeve (131), the fixed sleeve (131) being fixedly mounted on one end of the connecting frame (12) away from the fixed plate (10), the inner side wall of the fixed sleeve (131) being symmetrically provided with a guide groove (132), an interior of the fixed sleeve (131) being provided with a propulsion screw (133), the end of the propulsion screw (133) being symmetrically fixedly mounted with a guide block (134), the guide block (134) being slidably connected to the guide groove (132); a threaded sleeve (135) being rotatably mounted on the end of the fixed sleeve (131), the threaded sleeve (135) being threadedly connected to the propulsion screw (133), a propulsion frame (136) being fixedly mounted on one end of the propulsion screw (133) located outside the fixed sleeve (131), and an end of the propulsion frame (136) away from the propulsion screw (133) being fixedly connected to the slide frame (112).

7. The detachable supporting device for a red sandstone foundation pit according to claim 6 is characterized in that: The outer diameter of the threaded sleeve (135) is at least greater than the outer diameter of the fixed sleeve (131), and the threaded sleeve (135) and the gear rod (116) are connected via a synchronous belt transmission.

8. The detachable supporting device for a red sandstone foundation pit according to claim 4 is characterized in that: The rotary drilling assembly comprises: a rotating seat (141) rotatably mounted on the side of the circular plate (113); a transmission shaft (148) is also rotatably mounted on the side of the circular plate (113); an end of the transmission shaft (148) passes through the circular plate (113) and is fixedly connected to the rotating seat (141); a transmission gear (149) is fixedly mounted on one end of the transmission shaft (148) away from the circular plate (113); and the transmission gear (149) is meshed with the connecting gear (119); a rotating sleeve (142) is fixedly mounted on the side of the rotating seat (141); an electric push rod (143) is fixedly mounted on the inner side wall of the rotating sleeve (142); and an adjustment mechanism is provided on the rotating sleeve (142).

9. The detachable supporting device for a red sandstone foundation pit according to claim 8 is characterized in that: The adjustment mechanism comprises: a guide opening (144), wherein a plurality of guide openings (144) are distributed in a ring array and are opened at one end of the rotating sleeve (142) away from the rotating seat (141); a slide plate (145) is slidably mounted on the inner wall of each guide opening (144), and one end of the slide plate (145) located on the inner side of the rotating sleeve (142) is fixedly connected to the telescopic end of the electric push rod (143); and adjustment rods (146) distributed in a ring array are hingedly arranged on the side of the rotating seat (141), and a transmission rod (147) is hingedly arranged between the adjustment rod (146) and the slide plate (145).

10. The detachable supporting device for a red sandstone foundation pit according to claim 9, characterized in that: One end of the rotating sleeve (142) away from the rotating seat (141) is configured to be conical, and the adjusting rod (146), the transmission rod (147) and the rotating sleeve (142) are all made of high-strength metal material.

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