Deep foundation pit support structure with water stop and compression resistance protection mechanism

Abstract

The invention relates to the technical field of foundation pit support, in particular to a deep foundation pit support structure with a water-stop compression-resistant protection mechanism, which comprises a positioning frame of a concentric-square-shaped structure, lock holes are formed in four groups of corners of the bottom surface of the positioning frame, locking cones are in threaded connection with the interiors of the lock holes, and a plurality of groups of vertical plates are fixedly mounted in the positioning frame at fixed distances. A groove is formed in the center of the top surface of each group of vertical plates; according to the retaining structure, the inner walls of the two sides of the foundation pit are retained at the same time according to the internal width of the foundation pit so that the stability of the retaining structure can be improved, adaptive abutting retaining is conducted on the inclination angle of the inner side wall of the foundation pit and the uneven face so that the practicability of the retaining structure can be improved, meanwhile, dust cleaning can be conducted on the surfaces of a plurality of groups of retaining structures which are supported, and the retaining structure is convenient to use. Therefore, the conditions that the dead weight is increased and the follow-up using effect is affected due to dust adhesion are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit retaining technology, and in particular to a deep foundation pit retaining structure with a water-stopping and pressure-resistant protection mechanism. Background Art

[0002] Deep foundation pit refers to a foundation pit with an excavation depth of more than 5m, including earth excavation, support, dewatering engineering and other aspects. In the construction process of deep foundation pit engineering, support structures are often used to reinforce the edge of the deep foundation pit. Deep foundation pit support refers to the support, reinforcement and protection measures adopted for the side walls of the deep foundation pit and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit.

[0003] The traditional foundation pit enclosure structure is formed by vertically arranging and splicing multiple sets of enclosures, which has poor stability and pressure resistance. For example, the internal support mechanism of a deep foundation pit for construction with the publication number CN218622255U is convenient for assembling two adjacent foundation pit support plate bodies by using rectangular bars, rectangular grooves and fixing mechanisms;

[0004] However, in actual operation, the above patent content can only achieve unilateral support for deep foundation pits, and the stability of the enclosure device is still poor. Under the pressure of external force, the collapse of a single set of enclosure panels is likely to cause the collapse of the entire set of protection units, affecting the overall protection effect of the enclosure.

[0005] It is worth noting that, since the deep foundation pit is formed by continuous excavation by the excavator, the inner wall of the deep foundation pit is difficult to achieve a high degree of flatness, and it is easy to have concave or protruding in some local areas. However, when the above-mentioned patent content is used to enclose the inner wall with an inclined surface or an uneven wall, it is impossible to fully fit the inner wall adaptively, and it is difficult to achieve an excellent enclosure effect;

[0006] In view of the technical defects in this aspect, a solution is now proposed. Summary of the invention

[0007] The purpose of the present invention is to not only simultaneously fence the inner walls on both sides of the foundation pit according to the internal width of the foundation pit to increase the stability of the enclosure structure, but also to adaptively press the enclosure against the inclination angle and uneven surface of the inner wall of the foundation pit to increase the practicality of the enclosure, and at the same time, it is also possible to clean dust on the surfaces of several groups of enclosures that have been supported to reduce the situation where dust sticks to increase the dead weight and affect the subsequent use effect.

[0008] The purpose of the present invention can be achieved through the following technical solutions: a deep foundation pit retaining structure with a water-stopping and pressure-resistant protection mechanism, comprising a positioning frame of a round-shaped structure, wherein the bottom surface of the positioning frame is provided with locking holes at four groups of corners, and the locking holes are internally threaded with locking cones, and a plurality of groups of vertical plates are fixedly installed at a fixed distance inside the positioning frame, and a groove is provided at the center of the top surface of each group of the vertical plates, and a blocking mechanism is provided between the two adjacent groups of the vertical plates on the left and right and between the vertical plates and the front and rear frames of the positioning frame, and a dust removal component is provided on the top of the positioning frame;

[0009] The enclosure mechanism includes two cross bars, which are respectively fixedly mounted at the front and rear ends of two adjacent groups of vertical plates. A spiral rotating rod is rotatably connected to the interior of each cross bar. The two spiral rotating rods are opposed to each other front and back and fixedly connected, and their outer walls are arranged in opposite thread groove structures. A slave transmission wheel is fixedly mounted at the connection of the two spiral rotating rods.

[0010] Furthermore, the inner walls at the top of the positioning frame extend 3 cm beyond the top of the vertical plate, and the inner walls on both sides of the positioning frame are located at the center of the top and are rotatably connected to the main transmission wheels through a concave mounting frame, wherein the rear end rotating rod of one group of the main transmission wheels extends to the outside of the mounting frame and is provided with a motor, and a transmission belt is commonly sleeved between the left and right groups of the main transmission wheels, and the transmission belt passes through the groove and is commonly sleeved on the outside of several groups of slave transmission wheels.

[0011] Furthermore, a sleeve is threadedly sleeved on the outside of each spiral rotating rod near one end of the transmission wheel, and a sliding rod is fixedly connected to the center of the bottom of the sleeve. The bottom of the sliding rod is slidably connected to the inside of a sliding groove set on the bottom inner wall of the positioning frame. The front and rear two sliding rods are movably connected to a concave structured baffle frame away from each other through a connecting piece, and the baffle frame is set outside the positioning frame.

[0012] Furthermore, the side frames of the baffle frame are provided with notches at the upper and lower frames, and a movable baffle is hinged at the center of the opening side of the baffle frame through a rotating rod, the top of the movable baffle protrudes 3 cm from the top surface of the baffle frame, and both side surfaces of the movable baffle are provided with inner grooves at the upper and lower ends, and the top of each group of inner grooves is slidably connected to the ends of the hinge rods fixedly installed on the inner walls of both sides of the baffle frame at the upper and lower ends, and a damping spring vibration reduction ring is commonly provided between the ends of the hinge rods and the inner wall of the bottom of the inner groove.

[0013] Furthermore, the connecting member includes an insert tube and an insert rod, the insert tube is fixedly installed at the middle section of the sliding rod, one end of the insert rod is inserted into the insert tube, and the other end of the insert rod is rotationally connected to the opposite surface of the corresponding baffle frame.

[0014] Furthermore, a damping spring vibration reduction ring 2 is provided on the inner wall of the insert tube away from the tube mouth, and the damping spring vibration reduction ring 2 is against the end of the insert rod, a spiral groove is provided on the outer wall of the insert rod and at one end located inside the insert tube, and a round shaft is provided on the inner wall of the bottom of the insert tube at the tube mouth, and the round shaft is slidably connected to the end of the spiral groove.

[0015] Furthermore, the dust removal assembly includes a cylinder, and the cylinder is fixedly installed at the center of the top surface of the positioning frame through a machine base, and a card frame with an inverted concave structure is fixedly installed at the output end of the top of the cylinder through a push rod, and a rectangular sliding frame is fixedly installed at the bottom of the card frame.

[0016] Furthermore, the rectangular sliding frame is sleeved on the top of the outer side of the positioning frame and is located at the upper ends of the plurality of movable baffles, and the front and rear inner parts of the positioning frame are rotatably connected to cleaning rollers through rotating rods.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, the position of the positioning frame is first fixed, and then the motor is used to drive the main transmission wheel to rotate, and drive multiple groups of spiral rotating rods from the transmission wheel and its front and rear ends to rotate. Because the external threads of the two spiral rotating rods in the same row are arranged in opposite directions, the two groups of sleeves in the same row are forced to pull the sliding rods, connecting parts, baffle frames and movable baffles to move, and the two groups of baffle frames in the same row are separated from each other and move to the corresponding side walls of the deep V foundation pit respectively until the movable baffle contacts the side walls of the deep V foundation pit, and the bottom plate of the movable baffle first contacts the bottom wall surface of the side wall and then is resisted, forcing the movable baffle to deflect until the movable baffle is adaptively tilted and pressed against the side wall of the foundation pit, so as to adapt to the enclosure of the side wall of the deep V-shaped foundation pit;

[0019] At the same time, adaptive pressure is applied according to the specific concave and convex surface of the side wall of the foundation pit. Not only the inner walls on both sides of the foundation pit are simultaneously enclosed according to the internal width of the foundation pit to increase the stability of the enclosure structure, but also adaptive pressure is applied to the inclination angle and concave and convex surface of the inner wall of the foundation pit to increase the practicality of the enclosure.

[0020] 2. After the support is completed, the present invention resets and recovers several groups of movable baffles on both sides, and the cylinder pulls the card frame and the rectangular slide frame downward, and the rectangular slide frame slides along the outside of the positioning frame. Two groups of cleaning rollers are synchronously sunk with the rectangular slide frame, and respectively contact and roll with the outer wall surfaces of several groups of movable baffles on both sides to assist in removing dust and the like sticking to the surface of the movable baffles, thereby realizing automatic cleaning of several groups of movable baffles, reducing the increase in self-weight due to excessive dust adhering to the enclosure surface and affecting the subsequent smoothness of the enclosure surface, thereby realizing the continuous use effect of the enclosure structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall structure installation of the present invention;

[0024] Figure 3 It is a top-section stereoscopic schematic diagram of the positioning frame of the present invention;

[0025] Figure 4 It is a schematic diagram of a top-section plane of a positioning frame of the present invention;

[0026] Figure 5 It is a three-dimensional schematic diagram of the local structure of the enclosure mechanism of the present invention;

[0027] Figure 6 It is a schematic plan view of the local structure of the enclosure mechanism of the present invention;

[0028] Figure 7 It is a cross-sectional view of the overall structure of the present invention.

[0029] In the figure: 1. positioning frame; 101. main transmission wheel; 102. motor; 103. transmission belt; 2. vertical plate; 3. enclosure mechanism; 31. cross bar; 32. spiral rotating rod; 33. slave transmission wheel; 34. sleeve; 35. slide bar; 36. connecting piece; 361. insert cylinder; 362. insert rod; 363. damping spring vibration reduction ring 2; 364. spiral groove; 365. round shaft; 37. baffle frame; 38. movable baffle; 39. hinge rod; 310. damping spring vibration reduction ring 1; 4. dust removal assembly; 41. cylinder; 42. card frame; 43. rectangular slide frame; 44. cleaning roller. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1 - Figure 7 As shown, a deep foundation pit retaining structure with a water-stopping and pressure-resistant protection mechanism includes a positioning frame 1 of a round-shaped structure, the bottom surface of the positioning frame 1 is provided with locking holes at four groups of corners, and the locking holes are internally threaded with locking cones, a plurality of groups of vertical plates 2 are fixedly installed at a fixed distance inside the positioning frame 1, a groove is provided at the center of the top surface of each group of vertical plates 2, and a blocking mechanism 3 is provided between two adjacent groups of vertical plates 2 on the left and right and between the vertical plates 2 and the front and rear frames of the positioning frame 1;

[0032] When enclosing the inside of a deep V-shaped foundation pit, first place the positioning frame 1 at the center of the foundation pit, forcing the two sides of the positioning frame 1 to have the same length from the inner walls on both sides of the foundation pit, and then insert the four sets of locking cones with threaded structures into the corresponding locking holes and screw them into the ground, thereby fixing the position of the positioning frame 1, and using the enclosure mechanism 3 to support and press the inner walls on both sides of the foundation pit;

[0033] The enclosure mechanism 3 includes two cross bars 31, which are respectively fixedly mounted at the front and rear ends of two adjacent sets of vertical plates 2, and a spiral rotating rod 32 is rotatably connected to each cross bar 31. The two spiral rotating rods 32 are opposed to each other and fixedly connected, and their outer walls are arranged in opposite spiral groove structures.

[0034] A slave transmission wheel 33 is fixedly installed at the connection of the two spiral rotating rods 32. A sleeve 34 is threadedly sleeved on one end of the outer side of each spiral rotating rod 32 close to the slave transmission wheel 33, and a sliding rod 35 is fixedly connected at the center of the bottom of the sleeve 34. The bottom of the sliding rod 35 is slidably connected to the inside of the sliding groove set on the bottom inner wall of the positioning frame 1. The front and rear sliding rods 35 are away from each other and are movably connected to a concave structure stop frame 37 through a connecting piece 36, and the stop frame 37 is set outside the positioning frame 1;

[0035] The side frames of the baffle 37 are provided with notches at the upper and lower frames, and a movable baffle 38 is hinged at the center of the opening side of the baffle 37 through a rotating rod, and the top of the movable baffle 38 exceeds the top surface of the baffle 37 by 3 cm, so that the movable baffle 38 can press the top of the foundation pit, and the two side surfaces of the movable baffle 38 are provided with inner grooves at the upper and lower ends, and the top of each group of inner grooves is slidably connected to the ends of the hinge rods 39 fixedly installed at the upper and lower ends of the inner walls of both sides of the baffle 37, and a damping spring vibration reduction ring 310 is commonly provided between the ends of the hinge rods 39 and the inner wall of the bottom of the inner groove;

[0036] The inner wall of the top of the positioning frame 1 exceeds the top of the vertical plate 2 by 3 cm, and the inner walls on both sides of the positioning frame 1 are respectively connected to the main transmission wheels 101 through the concave mounting frame at the center of the top, and the rear end rotating rod of one group of main transmission wheels 101 extends to the outside of the mounting frame and is provided with a motor 102, and a transmission belt 103 is commonly sleeved between the left and right groups of main transmission wheels 101, and the transmission belt 103 passes through the groove and is commonly sleeved on the outside of several groups of slave transmission wheels 33;

[0037] After the positioning frame 1 is positioned, the motor 102 is started to drive the main transmission wheel 101 to rotate. Under the driving action of the transmission belt 103, another set of main transmission wheels 101 and a plurality of sets of slave transmission wheels 33 are forced to rotate. Each set of slave transmission wheels 33 pulls the spiral rotating rods 32 at the front and rear ends thereof to rotate synchronously.

[0038] However, although the spiral rotating rods 32 connected to the front and rear ends of the same slave transmission wheel 33 rotate in the same direction, their external threads are set in opposite directions, forcing the sleeves 34 connected by their external threads to move in the opposite direction and move away from the slave transmission wheel 33 respectively. At the same time, the sleeves 34 pull the sliding rods 35, the connecting pieces 36, the baffles 37 and the movable baffles 38 to move, and the two corresponding baffles 37 in the same row move away from each other and move toward the corresponding side walls of the deep V foundation pit respectively until the movable baffles 38 contact the side walls of the deep V foundation pit.

[0039] The bottom plate of the movable baffle 38 first contacts the bottom wall surface of the side wall and then is resisted, forcing the movable baffle 38 to deflect, and the hinge rods 39 on both sides of the movable baffle 38 slide along the inner groove and press against the damping spring vibration reduction ring 310 until the movable baffle 38 is adaptively tilted and pressed against the side wall of the foundation pit, so as to adapt to the enclosure of the deep V-shaped side wall of the foundation pit;

[0040] Compared with conventional vertical splicing enclosure components, it not only reduces the complicated installation and splicing process, but also can use two rows of several groups of movable baffles 38 to adaptively resist the inner walls on both sides of the deep V foundation pit according to the internal width of the deep V foundation pit and the slope of the inclined surface. On the basis of increasing the stability of the device, it improves the protection of the interior of the deep V foundation pit and reduces the situation where dust and water enter the interior of the foundation pit and cause the interior of the foundation pit to be buried;

[0041] It is worth mentioning that the enclosure mechanism 3 is not only suitable for the enclosure of deep V foundation pits, but can also be used for the enclosure of conventional deep foundation pits. The enclosure operation method refers to the above-mentioned enclosure of deep V foundation pits, but the difference is that the side walls of conventional deep foundation pits are vertical planes, and the movable baffle 38 does not deflect when resisting the side walls of the foundation pit, but is vertically pressed against the side walls of the foundation pit, so as to facilitate adaptation to the internal shapes of various deep foundation pits.

[0042] Embodiment 2: When the multiple groups of movable baffles 38 on both sides of the positioning frame 1 are moved toward the corresponding inner side walls of the foundation pit, since the side walls of the foundation pit are difficult to be completely flat during the excavation process, the side walls of the foundation pit contacted by the multiple groups of movable baffles 38 also have uneven surfaces. Under the same pressing force, adaptive pressing is required according to the specific uneven surface of the side walls of the foundation pit to further improve the enclosure effect;

[0043] See also Figure 5 , Figure 6As shown, the connecting member 36 includes an insert cylinder 361 and an insert rod 362. The insert cylinder 361 is fixedly installed at the middle section of the slide rod 35, and one end of the insert rod 362 is inserted into the insert cylinder 361, and the other end of the insert rod 362 is rotatably connected to the opposite surface of the corresponding stop frame 37. A damping spring vibration reduction ring 363 is provided at the inner wall of the insert cylinder 361 away from the tube mouth, and the damping spring vibration reduction ring 363 is abutted against the end of the insert rod 362. A spiral groove 364 is provided on the outer wall of the insert rod 362 and at one end located inside the insert cylinder 361. A round shaft 365 is provided on the inner wall of the bottom of the insert cylinder 361 at the tube mouth, and the round shaft 365 is slidably connected to the end of the spiral groove 364.

[0044] Therefore, the sliding rod 35 pushes the connecting piece 36 and the movable baffle 38 to move. If the wall of the foundation pit pressed by the movable baffle 38 is relatively protruding, the movable baffle 38 is resisted, and the baffle frame 37 and the insertion rod 362 are pushed to move in the opposite direction, and the insertion rod 362 is linearly inserted into the corresponding insertion tube 361, the damping spring vibration reduction ring 2 363 is compressed, and the circular shaft 365 presses against the inner wall of the spiral groove 364, and forces the insertion rod 362 to rotate until the remaining movable baffles 38 reach a suitable enclosure position and stop pressing, thereby using the spiral groove 364 to lock the positions of the circular shaft 365, the insertion rod 362, the baffle frame 37 and the movable baffle 38 to prevent the movable baffle 38 from moving arbitrarily due to the linear insertion connection method, thereby reducing the impact on the enclosure effect of the protruding area of ​​the foundation pit.

[0045] Example 3: Please refer to Figure 4 and Figure 7 As shown, a dust removal assembly 4 is provided on the top of the positioning frame 1, and the dust removal assembly 4 includes a cylinder 41, and the cylinder 41 is fixedly installed at the center of the top surface of the positioning frame 1 through a machine base, and a card frame 42 with an inverted concave structure is fixedly installed at the output end of the top of the cylinder 41 through a push rod, and a rectangular slide frame 43 is fixedly installed at the bottom of the card frame 42, and the rectangular slide frame 43 is sleeved at the top end of the outer side of the positioning frame 1 and is located at the upper end of a plurality of groups of movable baffles 38, and the front and rear inner parts of the positioning frame 1 are respectively rotatably connected with cleaning rollers 44 through rotating rods;

[0046] After the support is completed, the several groups of movable baffles 38 on both sides are reset and recovered, and then the cylinder 41 is started to use the push rod to pull the card frame 42 and the rectangular sliding frame 43 downward, and the rectangular sliding frame 43 slides along the outside of the positioning frame 1, and the two groups of cleaning rollers 44 are synchronously settled with the rectangular sliding frame 43, and respectively contact and roll with the outer wall surfaces of the several groups of movable baffles 38 on both sides to assist in removing dust sticking to the surface of the movable baffles 38, thereby realizing automatic cleaning of the several groups of movable baffles 38, reducing the increase in their own weight due to excessive dust adhering to the surface of the enclosure and affecting the subsequent smoothness of the enclosure surface, and realizing the continuous use effect of the enclosure structure.

[0047] In summary, when the present invention is used, the positioning frame 1 is first placed at the center of the foundation pit, forcing the lengths of the two sides of the positioning frame 1 to be consistent with the inner walls of the two sides of the foundation pit, and then four sets of locking cones with threaded structures are respectively inserted into the corresponding locking holes and screwed into the ground, thereby fixing the position of the positioning frame 1;

[0048] The blocking mechanism 3 is then used to support and press the inner walls of both sides of the foundation pit, including: starting the motor 102 to drive the main transmission wheel 101 to rotate, and under the transmission action of the transmission belt 103, another group of main transmission wheels 101 and several groups of slave transmission wheels 33 are forced to rotate, and each group of slave transmission wheels 33 respectively pulls the spiral rotating rods 32 at the front and rear ends thereof to rotate synchronously;

[0049] However, although the spiral rotating rods 32 connected to the front and rear ends of the same slave transmission wheel 33 rotate in the same direction, their external threads are set in opposite directions, forcing the sleeves 34 connected by their external threads to move in the opposite direction and move away from the slave transmission wheel 33 respectively. At the same time, the sleeves 34 pull the sliding rods 35, the connecting pieces 36, the baffles 37 and the movable baffles 38 to move, and the two corresponding baffles 37 in the same row move away from each other and move toward the corresponding side walls of the deep V foundation pit respectively until the movable baffles 38 contact the side walls of the deep V foundation pit.

[0050] The bottom plate of the movable baffle 38 first contacts the bottom wall surface of the side wall and then is resisted, forcing the movable baffle 38 to deflect, and the hinge rods 39 on both sides of the movable baffle 38 slide along the inner groove and press against the damping spring vibration reduction ring 310 until the movable baffle 38 is adaptively tilted and pressed against the side wall of the foundation pit, so as to adapt to the enclosure of the deep V-shaped side wall of the foundation pit;

[0051] After the support is completed, the groups of movable baffles 38 on both sides are reset and recovered, and then the cylinder 41 is started to use the push rod to pull the card frame 42 and the rectangular sliding frame 43 downward, and the rectangular sliding frame 43 slides along the outside of the positioning frame 1, and the two groups of cleaning rollers 44 are synchronously settled with the rectangular sliding frame 43, and respectively contact and roll with the outer wall surfaces of the groups of movable baffles 38 on both sides to assist in removing dust and the like stuck on the surface of the movable baffles 38, thereby realizing automatic cleaning of the groups of movable baffles 38;

[0052] It is worth mentioning that the enclosure mechanism 3 is not only suitable for the enclosure of deep V foundation pits, but can also be used for the enclosure of conventional deep foundation pits. The enclosure operation method refers to the above-mentioned enclosure of deep V foundation pits, but the difference is that the side walls of conventional deep foundation pits are vertical planes, and the movable baffle 38 does not deflect when resisting the side walls of the foundation pit, but is vertically pressed against the side walls of the foundation pit.

[0053] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A deep foundation pit retaining structure with a water-stopping and pressure-resistant protection mechanism, comprising a positioning frame (1) of a round-shaped structure, wherein the bottom surface of the positioning frame (1) is provided with locking holes at four groups of corners, and the locking holes are internally threadedly connected with locking cones, characterized in that: A plurality of groups of vertical plates (2) are fixedly installed at a fixed distance inside the positioning frame (1); a groove is provided at the center of the top surface of each group of vertical plates (2); a blocking mechanism (3) is provided between two adjacent groups of vertical plates (2) on the left and right, and between the vertical plates (2) and the front and rear frames of the positioning frame (1); and a dust removal component (4) is provided on the top of the positioning frame (1); The enclosure mechanism (3) comprises two cross bars (31), the two cross bars (31) being fixedly mounted at the front and rear ends of two adjacent groups of vertical plates (2) at intervals, each cross bar (31) having a spiral rotating rod (32) running through it for rotation, the two spiral rotating rods (32) being opposed to each other front and back and fixedly connected, and their outer walls being arranged in opposite spiral groove structures, and a slave transmission wheel (33) being fixedly mounted at the connection of the two spiral rotating rods (32).

2. The deep foundation pit retaining structure with water-stopping and pressure-resistant protection mechanism according to claim 1 is characterized in that: The inner wall of the top of the positioning frame (1) exceeds the top of the vertical plate (2) by 3-5 cm, and the inner walls on both sides of the positioning frame (1) are rotatably connected to the main transmission wheels (101) at the center of the top through concave mounting frames, wherein the rear end rotating rod of one group of the main transmission wheels (101) extends to the outside of the mounting frame and is provided with a motor (102), and a transmission belt (103) is commonly sleeved between the left and right groups of the main transmission wheels (101), and the transmission belt (103) passes through the groove and is commonly sleeved on the outside of a plurality of groups of secondary transmission wheels (33).

3. The deep foundation pit retaining structure with water-stopping and pressure-resistant protection mechanism according to claim 1 is characterized in that: A sleeve (34) is threadedly sleeved on the outside of each spiral rotating rod (32) near one end of the transmission wheel (33), and a sliding rod (35) is fixedly connected at the center of the bottom of the sleeve (34). The bottom of the sliding rod (35) is slidably connected to the inside of a sliding groove provided on the bottom inner wall of the positioning frame (1). The front and rear sliding rods (35) are movably connected to a concave-structured stop frame (37) through a connecting piece (36) away from each other, and the stop frame (37) is provided outside the positioning frame (1).

4. The deep foundation pit retaining structure with water-stopping and pressure-resistant protection mechanism according to claim 3 is characterized in that: The side frames of the baffle (37) are both provided with notches at the upper and lower frames, and a movable baffle (38) is hinged at the center of the opening side of the baffle (37) through a rotating rod, the top of the movable baffle (38) exceeds the top surface of the baffle (37) by 3-5 cm, and the two side surfaces of the movable baffle (38) are both provided with inner grooves at the upper and lower ends, and the top of each group of inner grooves is slidably connected to the ends of hinge rods (39) fixedly installed at the upper and lower ends of the inner walls of both sides of the baffle (37), and a damping spring vibration reduction ring (310) is commonly provided between the ends of the hinge rods (39) and the inner wall of the bottom of the inner groove.

5. The deep foundation pit retaining structure with water-stopping and pressure-resistant protection mechanism according to claim 3 is characterized in that: The connecting member (36) comprises an insert cylinder (361) and an insert rod (362); the insert cylinder (361) is fixedly mounted at the middle section of the slide rod (35), one end of the insert rod (362) is inserted into the insert cylinder (361), and the other end of the insert rod (362) is rotatably connected to the opposite surface of the corresponding stop frame (37).

6. The deep foundation pit retaining structure with water-stopping and pressure-resistant protection mechanism according to claim 5 is characterized in that: A damping spring vibration reduction ring 2 (363) is arranged on the inner wall of the insert cylinder (361) away from the cylinder mouth, and the damping spring vibration reduction ring 2 (363) is abutted against the end of the insert rod (362), and a spiral groove (364) is arranged on the outer wall of the insert rod (362) and one end located inside the insert cylinder (361), and a round shaft (365) is arranged on the inner wall of the bottom of the insert cylinder (361) at the cylinder mouth, and the round shaft (365) is slidably connected to the end of the spiral groove (364).

7. The deep foundation pit retaining structure with water-stopping and pressure-resistant protection mechanism according to claim 1 is characterized in that: The dust removal component (4) comprises a cylinder (41), and the cylinder (41) is fixedly mounted at the center of the top surface of the positioning frame (1) through a machine base, and a card frame (42) with an inverted concave structure is fixedly mounted at the top output end of the cylinder (41) through a push rod, and a rectangular sliding frame (43) is fixedly mounted at the bottom of the card frame (42).

8. The deep foundation pit retaining structure with water-stopping and pressure-resistant protection mechanism according to claim 7 is characterized in that: The rectangular sliding frame (43) is sleeved on the top of the outside of the positioning frame (1) and is located at the upper ends of a plurality of groups of movable baffles (38), and the front and rear inner parts of the positioning frame (1) are rotatably connected to cleaning rollers (44) via rotating rods.

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