A support structure for foundation pit protection and use method thereof

Abstract

The present invention relates to the technical field of foundation pit enclosure, and specifically to a support structure for foundation pit enclosure and a method of using the support structure, including a enclosure frame, an inner surface of the enclosure frame having a connecting installation groove, an inner surface of the enclosure frame having a sliding connecting groove, an inner surface of the enclosure frame having a connecting snap-fit ​​groove, an inner surface of the connecting installation groove having a folding locking mechanism, an outer surface of the folding locking mechanism having a connecting mechanism, and an inner surface of the enclosure frame having a bottom supporting mechanism, which can fix the rotation angle of the enclosure frames on both sides, thereby realizing the folding of the enclosure frames connected to each other, and locking the rotation angles of ninety degrees and one hundred and eighty degrees when supporting the foundation pit to fit the inner surface of the foundation pit, thereby increasing the support stability, inserting the bottom insertion cone into the ground of the foundation pit by rotating and pressing down, and controlling the locking of the folding locking mechanism while pressing down, and after the bottom insertion cone is fully pressed down, the outer side of the bottom insertion cone will extend out of the side insertion cone and be inserted into the ground.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit enclosure, and in particular to a support structure for foundation pit enclosure and a use method thereof. Background Art

[0002] Foundation pit support is an indispensable and important part of construction projects. Its main function is to ensure safety during foundation pit excavation, prevent soil collapse and groundwater infiltration, and effectively protect the surrounding environment and buildings from being affected. Common forms of foundation pit support include steel sheet piles, underground continuous walls, etc. These retaining structures not only have high strength and stability, but can also be customized according to project requirements.

[0003] Usually, foundation pit support requires the construction of scaffolding first.

[0004] The existing patent (publication number: CN112302416B) discloses a foundation pit edge retaining structure, including multiple columns, one end of which is provided with a support plate, and the support plate is provided with a mounting piece, each column includes multiple mounting columns, and adjacent mounting columns are provided with connecting pieces for detachably connecting adjacent mounting columns together, one side of each mounting column is provided with a connecting groove, and the other side is provided with a fixing groove, both ends of the connecting groove are closed, and both ends of the fixing groove are closed, a cloth winding roller is rotatably arranged in the connecting groove along the length direction of the connecting groove, a clockwork spring and a shielding cloth are wound on the cloth winding roller, one side of the clockwork spring is fixedly arranged on the cloth winding roller, and one side of the shielding cloth is fixedly arranged on the edge of the clockwork spring away from the cloth winding roller, a connecting rod is fixedly arranged on the edge of the shielding cloth away from the clockwork spring, and a fixing piece for fixing the connecting rod to the fixing groove is arranged in the fixing groove. In the above equipment, the shielding cloth is connected by multiple columns. Since the shielding cloth is relatively soft, the strength may be insufficient when used as a foundation pit enclosure, and the shielding cloths are flexibly connected. The foundation pits after excavation are mostly complete rectangles, which may not be convenient for stable support at different angles and difficult to adapt to the right-angled edges inside the foundation pit, resulting in poor support effect.

[0005] In view of this, we provide a support structure for foundation pit protection and a method of using the same. Summary of the invention

[0006] The object of the present invention is to provide a support structure for foundation pit enclosure and a method of using the same, so as to solve the problem that the existing support for foundation pit enclosure proposed in the above background technology may not be able to stably support at different angles, resulting in poor support effect and insufficient bottom support. In order to achieve the above object, the present invention provides the following technical solutions: a support structure for foundation pit enclosure and a method of using the same, comprising a enclosure frame, the inner surface of the enclosure frame is provided with a connecting installation groove, the inner surface of the enclosure frame is provided with a sliding connecting groove, the inner surface of the enclosure frame is provided with a connecting snap-fitting groove, the inner surface of the connecting installation groove is provided with a folding locking mechanism, the outer surface of the folding locking mechanism is provided with a connecting mechanism, and the inner surface of the enclosure frame is provided with a bottom supporting mechanism.

[0007] Preferably, the folding locking mechanism includes a fixed base, the fixed base is snap-connected with the inner surface of the connecting mounting groove, the top surface of the fixed base is fixedly connected with a bottom fixing cylinder, the top surface of the bottom fixing cylinder is provided with a bottom path groove, the top surface of the bottom fixing cylinder is fixedly connected with a fixed cylinder connecting column, the top surface of the fixed cylinder connecting column is fixedly connected with a jacking spring, the outer surface of the fixed cylinder connecting column is slidably connected with a top fixing cylinder, the bottom surface of the top fixing cylinder is provided with a top path groove, the inner side of the top fixing cylinder is slidably connected with a rotating base, the bottom surface of the rotating base is provided with a vertical movable groove, the vertical movable groove The inner surface of the straight movable groove is fixedly connected with an ejection spring, the bottom surface of the ejection spring is fixedly connected with a block base, the outer surface of the block base is fixedly connected with a path block, the outer surface of the rotating base is fixedly connected with a hinged base, one end of the hinged base is hingedly connected with a hinged sliding block, the top surface of the hinged sliding block is fixedly connected with a sliding limit block, the outer surface of the top fixed cylinder is fixedly connected with a driven pressing block, the inner surface of the driven pressing block is slidably connected with a vertical moving column, the outer surface of the vertical moving column is fixedly connected with an active pressing ring, and the top surface of the vertical moving column is fixedly connected with a rotating connecting arm.

[0008] Preferably, the bottom fixed cylinder and the top fixed cylinder are both slidably connected to the rotating base, the number of the fixed cylinder connecting columns is three, the top surface of the lifting spring is fixedly connected to the top fixed cylinder, the block base is slidably connected to the inner surface of the vertical movable groove, the groove provided in the vertical movable groove is engaged with the protrusion provided outside the block base, the path block is slidably connected to the bottom path groove and the top path groove, the articulated base, the articulated sliding block and the sliding limit block are all slidably connected to the inner surface of the sliding connection groove, and the bottom surface of the active lower pressure ring is slidably connected to the top surface of the driven lower pressure block.

[0009] Preferably, the connecting mechanism includes a movable groove of a card block, the movable groove of the card block is opened on the outer surface of the fixed base, the inner surface of the movable groove of the card block is slidably connected with a vertical card block, the bottom surface of the vertical card block is opened with a contact inclined groove, the outer surface of the vertical card block is fixedly connected with a rotating toggle block, the top surface of the vertical card block is fixedly connected with a card block reset spring, and the inner surface of the vertical card block is slidably connected with a card block limiting column.

[0010] Preferably, the vertical block penetrates to the inner surface of the connecting locking groove, the contact inclined groove is slidingly connected to the inner surface of the connecting locking groove, the top surface of the block return spring is fixedly connected to the bottom surface of the driven downward pressure block, the block limit column is rotatably connected to the bottom surface of the driven downward pressure block, and the block return spring is sleeved on the outer surface of the block limit column.

[0011] Preferably, the bottom supporting mechanism includes an outer movable column, the outer movable column is slidably connected to the inner surface of the enclosing frame, the outer surface of the outer movable column is fixedly connected with a trigger ring, the inner surface of the outer movable column is slidably connected to the inner movable column, the bottom surface of the inner movable column is fixedly connected with a connecting ring, the outer surface of the connecting ring is hingedly connected with an articulated connecting arm, the other end of the articulated connecting arm is hingedly connected with a driven push-pull seat, the bottom surface of the driven push-pull seat is fixedly connected with a driven direct-acting seat, the outer surface of the driven direct-acting seat is provided with a side insertion cone, the bottom surface of the inner movable column is fixedly connected with a connecting limit column, the top surface of the inner movable column is fixedly connected with a control handle, the bottom surface of the outer movable column is fixedly connected with a bottom shell, the outer surface of the bottom shell is provided with a side cone passing groove, and the bottom surface of the bottom shell is fixedly connected with a bottom insertion cone.

[0012] Preferably, a groove is provided in the outer movable column and a protrusion is provided outside the inner movable column, which engages with each other. The outer movable column and the inner movable column have an interference fit. The number of the articulated connecting arms is four, and the four articulated connecting arms are distributed in a ring around the connecting ring. The number of the side cone passing grooves is four, and the four side cone passing grooves are distributed in a ring around the bottom outer shell. The side cone passing grooves are slidingly connected to the driven direct-acting seat and the driven push-pull seat. The connecting limit column penetrates to the inner surface of the bottom insertion cone. The outer movable column penetrates the fixed base, the bottom fixed cylinder, the top fixed cylinder, the rotating base and the block base, and the outer movable column is rotatably connected to the rotating connecting arm.

[0013] A method for using a support structure for foundation pit protection comprises the following steps:

[0014] S1. In the initial state of the folding locking mechanism, only the hinged base, the hinged sliding block and the sliding limit block are connected to the enclosure frame in the sliding connection groove, and the fixed base is not connected to the enclosure frame. The vertical clamping block is rotated so that the contact inclined groove faces the connecting installation groove, and one side of the fixed base is pushed into the connecting installation groove. The connecting installation groove contacts the inclined surface of the contact inclined groove to lift it up, and the vertical clamping block continues to move inward until it contacts the connecting engaging groove. The vertical clamping block is ejected downward by the clamping block reset spring and sinks into the connecting engaging groove. At this time, the connection is completed, and multiple enclosure frames are connected together, which is convenient for folding and adapting to foundation pits of different sizes;

[0015] S2. When the articulated base and the articulated sliding block are inside the sliding connection groove, the connection is stuck and cannot rotate. After the articulated base and the articulated sliding block are removed from the sliding connection groove, the distance between the enclosure frame connected to the rotating base and the enclosure frame connected to the fixed base increases, and at this time, the rotating base and the articulated sliding block are both rotated 90 degrees to make the enclosure frames on both sides stick together, so that they can be folded for easy storage and transportation;

[0016] S3, the bottom fixed tube and the top fixed tube are connected to form a complete tube through the fixed tube connecting column. In the initial state, the top fixed tube is lifted up by the lifting spring. The distance between the bottom fixed tube and the top fixed tube is enough for the path block to pass. When the rotating base rotates, it will drive the enclosure frames on both sides to rotate, and when it rotates to 90 degrees and 180 degrees, the path block will be stuck in the groove of the bottom path groove. At this time, there is no obstruction on the top, and it can be forced to continue to rotate so that the block base is lifted up and enters the next groove, which is used to position the enclosure frames on both sides at the 90-degree and 180-degree rotation angles;

[0017] S4. After the rotation angle of the enclosure frame is determined, the inner movable column is rotated and pressed down by controlling the handle, so that the outer movable column drives the bottom bottom insertion cone to rotate and drill into the bottom of the foundation pit, driving the rotating connecting arm and the active downward pressure ring on the surface to press down on the top fixed cylinder, and the distance between the bottom fixed cylinder and the top fixed cylinder is reduced. The path block cannot pass and can only be stuck in the groove of the bottom path groove to fix the rotation angle of the enclosure frames on both sides. The outer movable column drives the bottom bottom insertion cone to rotate and drill into the bottom of the foundation pit until the trigger ring on the outer movable column contacts the top of the enclosure frame. Continuing to press down the inner movable column will make it slide downward in the outer movable column and press down the connecting ring, driving the four articulated connecting arms to push the driven push-pull seat and the driven direct-acting seat outward, extending from the inside of the bottom shell to the outside, and the side insertion cone on the driven direct-acting seat will be inserted into the underground of the foundation pit from the side to clamp the entire maintenance.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, by setting up the folding locking mechanism, the rotation angle of the retaining frames on both sides can be fixed, so that the mutually connected retaining frames can be folded together, and when supporting the foundation pit, the rotation angles of ninety degrees and one hundred and eighty degrees can be locked to fit the internal surface of the foundation pit and increase the support stability.

[0020] In the present invention, through the setting of the connecting mechanism, during use, the connection between the enclosure frame and the folding locking mechanism is realized, and multiple enclosure frames are connected together, which is convenient for folding and adapting to foundation pits of different sizes, so that the enclosure pit enclosure can be connected end to end inside the foundation pit, thereby increasing the supporting effect.

[0021] In the present invention, through the setting of the bottom support mechanism, the bottom insertion cone is inserted into the underground of the foundation pit by rotating and pressing down, and the locking of the folding locking mechanism is controlled while pressing down. After the bottom insertion cone is fully pressed down, the outer side of the bottom insertion cone will extend out and the side insertion cone will be inserted into the ground, so that the entire structure can be stably inserted inside the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 It is a schematic diagram of the structure of the enclosure frame, the connection installation groove, the sliding connection groove, and the connection snap-fit ​​groove cooperating with each other in the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the enclosure frames cooperating with each other of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the folding locking mechanism of the present invention cooperating with each other;

[0026] Figure 5 An exploded view of the cooperation between the components of the folding locking mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure in which the rotating connecting arm, the active downward pressing ring, the driven downward pressing block and the top fixing cylinder cooperate with each other in the present invention;

[0028] Figure 7 It is a schematic diagram of the structure in which the bottom fixing cylinder, the fixing cylinder connecting column, the lifting spring and the top fixing cylinder cooperate with each other in the present invention;

[0029] Figure 8 It is a schematic diagram of the structure in which the enclosure frame, the connecting engaging groove and the vertical clamping block cooperate with each other in the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure in which the vertical clamping block, the contact inclined groove, the rotating toggle block and the clamping block return spring cooperate with each other in the present invention;

[0031] Fig.10 It is a schematic diagram of the structure in which the outer movable column, the rotating connecting arm and the vertical movable column cooperate with each other in the present invention;

[0032] Fig.11 It is a schematic diagram of the structure in which the outer movable column, the trigger ring and the inner movable column cooperate with each other in the present invention;

[0033] Fig.12 It is a schematic diagram of the structure in which the inner movable column, the connecting ring, the hinged connecting arm, and the driven push-pull seat cooperate with each other in the present invention;

[0034] Fig.13 This is an exploded view of the driven push-pull seat, the side insertion cone, and the side cone through the groove cooperating with each other in the present invention.

[0035] In the figure: 1, enclosure frame; 11, connection installation groove; 12, sliding connection groove; 13, connection clamping groove; 2, folding locking mechanism; 21, fixed base; 211, bottom fixed cylinder; 2111, bottom path groove; 2112, fixed cylinder connecting column; 21121, lifting spring; 212, top fixed cylinder; 2121, top path groove; 22, rotating base; 221, vertical movable groove; 222, ejection spring; 224, block base; 2241, path block; 23, hinged base; 231, hinged sliding block; 232, sliding limit block; 24, driven lower pressure block; 25, vertical moving column; 251. Active downward pressure ring; 252. Rotating connecting arm; 3. Connecting mechanism; 31. Block movable groove; 32. Vertical block; 321. Contact inclined groove; 322. Rotating toggle block; 33. Block reset spring; 34. Block limit column; 4. Bottom supporting mechanism; 41. External movable column; 411. Trigger ring; 42. Internal movable column; 421. Connecting ring; 4211. Articulated connecting arm; 4212. Driven push-pull seat; 4213. Driven direct-acting seat; 42131. Side insertion cone; 422. Connecting limit column; 43. Control handle; 44. Bottom shell; 441. Side cone passing groove; 45. Bottom insertion cone. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figures 1 to 13The present invention provides a technical solution: a support structure for foundation pit enclosure and a method of using the same, comprising an enclosure frame 1, a connecting and mounting groove 11 is provided on the inner surface of the enclosure frame 1, a sliding connecting groove 12 is provided on the inner surface of the enclosure frame 1, a connecting snap-fit ​​groove 13 is provided on the inner surface of the enclosure frame 1, a folding locking mechanism 2 is provided on the inner surface of the connecting and mounting groove 11, a connecting mechanism 3 is provided on the outer surface of the folding locking mechanism 2, a bottom supporting mechanism 4 is provided on the inner surface of the enclosure frame 1, the enclosure frame 1 is the main part of the entire support structure, and is used to provide support and installation position, and the connecting and mounting groove 11, the sliding connecting groove 12, and the connecting snap-fit ​​groove 13 are used for various mechanisms to restrict them on the enclosure frame 1 and provide activity space.

[0038] The folding locking mechanism 2 includes a fixed base 21, which is engaged with the inner surface of the connecting and mounting groove 11, and the top surface of the fixed base 21 is fixedly connected with a bottom fixed cylinder 211, and the top surface of the bottom fixed cylinder 211 is provided with a bottom path groove 2111, and the top surface of the bottom fixed cylinder 211 is fixedly connected with a fixed cylinder connecting column 2112, and the top surface of the fixed cylinder connecting column 2112 is fixedly connected with a lifting spring 21121, and the outer surface of the fixed cylinder connecting column 2112 is slidably connected with the top fixed cylinder 212, and the bottom surface of the top fixed cylinder 212 is provided with a top path groove 2121, and the inner side of the top fixed cylinder 212 is slidably connected with a rotating base 22, and the bottom surface of the rotating base 22 is provided with a vertical The movable groove 221, the inner surface of the vertical movable groove 221 is fixedly connected with an ejection spring 222, the bottom surface of the ejection spring 222 is fixedly connected with a block base 224, the outer surface of the block base 224 is fixedly connected with a path block 2241, the outer surface of the rotating base 22 is fixedly connected with an articulated base 23, one end of the articulated base 23 is hingedly connected with an articulated sliding block 231, the top surface of the articulated sliding block 231 is fixedly connected with a sliding limit block 232, the outer surface of the top fixed cylinder 212 is fixedly connected with a driven pressing block 24, the inner surface of the driven pressing block 24 is slidably connected with a vertical moving column 25, the outer surface of the vertical moving column 25 is fixedly connected with an active pressing ring 251, the top surface of the vertical moving column 25 The surface is fixedly connected with a rotating connecting arm 252. Through the setting of the folding locking mechanism 2, during use, the fixed base 21 and the rotating base 22 are respectively connected to the enclosure frame 1 on one side, but the fixed base 21 is connected by the connecting mechanism 3, and the rotating base 22 extends to the inside of the sliding connection groove 12 on the enclosure frame 1 through the hinged base 23 and the hinged sliding block 231 at the top, and the hinged base 23 and the hinged sliding block 231 can rotate. When the hinged base 23 and the hinged sliding block 231 are inside, the connection is stuck by the inner wall of the sliding connection groove 12 and cannot rotate. When it is moved out of the sliding connection groove 12, the distance between the enclosure frame 1 connected to the rotating base 22 and the enclosure frame 1 connected to the fixed base 21 increases. At this time The rotating base 22 and the hinged sliding block 231 are both rotated ninety degrees to make the enclosure frames 1 on both sides stick together for folding for storage and transportation. The bottom fixed cylinder 211 and the top fixed cylinder 212 are connected to form a complete cylinder through the fixed cylinder connecting column 2112. Since the bottom fixed cylinder 211 is fixed by the fixed base 21, the top fixed cylinder 212 cannot rotate, and the distance between them can be changed. When the distance can be large enough, the path block 2241 slides between the bottom path groove 2111 and the top path groove 2121, the fixed base 21 is connected to the enclosure frame 1 on one side, and the enclosure frame 1 on the other side is connected to the rotating base 22. The rotating base 22 is slidably connected to the block base 224 through the vertical movable groove 221 and meshes with each other.The block base 224 can slide freely in the vertical movable groove 221, and the rotation of the block base 224 can drive the rotating base 22 to rotate, and the block base 224 will be ejected by the ejection spring 222 inside the vertical movable groove 221, so that the path block 2241 is tightly attached to the surface of the bottom path groove 2111, and because the block base 224 can slide and rotate inside the top fixed cylinder 212 through the fixed cylinder connecting column 2112, when the rotating base 22 rotates, it will drive the enclosure frames 1 on both sides to rotate relative to each other, and when it is rotated to 90 degrees and 180 degrees, the path block 2241 will be stuck in the groove of the bottom path groove 2111. At this time, there is no obstruction on the top, and it can be forced to continue to rotate so that the block base 224 is lifted up and enters the next The grooves are used to locate the rotation angles of the enclosure frames 1 on both sides at ninety degrees and one hundred and eighty degrees. After the rotation angle of the enclosure frames 1 is determined, when the bottom support mechanism 4 is pressed down and fixed, it will drive the surface rotation connection arm 252 to press down, and through the active pressing ring 251 on the vertical moving column 25, the driven pressing block 24 on the top fixed cylinder 212 is pressed down, and the distance between the bottom fixed cylinder 211 and the top fixed cylinder 212 is reduced. The path block 2241 cannot pass through and can only be stuck in the groove of the bottom path groove 2111, which is used to fix the rotation angle of the enclosure frames 1 on both sides, so that the interconnected enclosure frames 1 can be folded with each other, and when supporting the foundation pit, the rotation angles of ninety degrees and one hundred and eighty degrees are locked to fit the inner surface of the foundation pit and increase the support stability.

[0039] The bottom fixed cylinder 211 and the top fixed cylinder 212 are both slidably connected to the rotating base 22, the number of fixed cylinder connecting columns 2112 is three, the top surface of the lifting spring 21121 is fixedly connected to the top fixed cylinder 212, the block base 224 is slidably connected to the inner surface of the vertical movable groove 221, the groove provided in the vertical movable groove 221 is engaged with the protrusion provided outside the block base 224, the path block 2241 is slidably connected to the bottom path groove 2111 and the top path groove 2121, the hinged base 23, the hinged sliding block 231 and the sliding limit block 232 are all slidably connected to the inner surface of the sliding connection groove 12, the bottom surface of the active lower pressure ring 251 is slidably connected to the top surface of the driven lower pressure block 24, the rotating base 22 can slide and rotate in the bottom fixed cylinder 211 and the top fixed cylinder 212, and the sliding can make the top fixed cylinder 212 move on the surface when pressed down. The top fixed cylinder 212 is lifted up by the lifting spring 21121, and resets after the rotating connecting arm 252 is retracted so that the gap between the bottom fixed cylinder 211 and the top fixed cylinder 212 becomes larger again. The vertical movable groove 221 and the block base 224 are engaged with each other through the groove protrusion, so that they can rotate synchronously without affecting the vertical sliding. The articulated base 23, the articulated sliding block 231 and the sliding limit block 232 extend the spacing of the enclosure frame 1 by sliding in the sliding connection groove 12, and rotate to retract the enclosure frame 1. The active downward pressure ring 251 is used to press down the driven downward pressure block 24 to drive the top fixed cylinder 212 to press down. The vertical movable column 25 slides on the driven downward pressure block 24 to position and ensure that the active downward pressure ring 251 is aligned with the driven downward pressure block 24 during descent.

[0040] The connecting mechanism 3 includes a card block movable groove 31, the card block movable groove 31 is opened on the outer surface of the fixed base 21, the inner surface of the card block movable groove 31 is slidably connected with a vertical card block 32, the bottom surface of the vertical card block 32 is opened with a contact inclined groove 321, the outer surface of the vertical card block 32 is fixedly connected with a rotating toggle block 322, the top surface of the vertical card block 32 is fixedly connected with a card block reset spring 33, and the inner surface of the vertical card block 32 is slidably connected with a card block limiting column 34. Through the setting of the connecting mechanism 3, during use, the vertical card block 32 can slide in the card block movable groove 31 and outside the card block limiting column 34 to limit the moving path. The folding locking mechanism 2 is not connected to the enclosure frame 1 in the initial state. When connection is required, the vertical card block 32 is rotated by rotating the toggle block 322 to make it contact the inclined groove. The groove 321 faces the connecting mounting groove 11, and one side of the fixing base 21 is pushed into the connecting mounting groove 11. The connecting mounting groove 11 contacts the inclined surface of the contact inclined groove 321 to lift it up, and compresses the card block return spring 33. The vertical card block 32 continues to move inward until it contacts the connecting locking groove 13. The vertical card block 32 is ejected downward by the card block return spring 33 and sinks into the connecting locking groove 13. At this time, if the vertical card block 32 is pulled back in the opposite direction, it cannot be lifted up because it cannot contact the contact inclined groove 321 on the vertical card block 32. At this time, the connection is completed. When the connection needs to be canceled, the vertical card block 32 is rotated by rotating the toggle block 322 so that its contact inclined groove 321 faces the opposite direction. At this time, the folding locking mechanism 2 is pulled again, and the vertical card block 32 will be lifted again to separate the enclosure frame 1 from the folding locking mechanism 2.

[0041] The vertical block 32 penetrates the inner surface of the connecting locking groove 13, and the contact inclined groove 321 is slidably connected to the inner surface of the connecting locking groove 13, the top surface of the block return spring 33 is fixedly connected to the bottom surface of the driven downward pressure block 24, and the block limit column 34 is rotatably connected to the bottom surface of the driven downward pressure block 24, and the block return spring 33 is sleeved on the outer surface of the block limit column 34. The vertical block 32 is embedded in the connecting locking groove 13 and controls the movable direction by contacting the inclined groove 321 to achieve locking, thereby realizing the connection between the enclosure frame 1 and the folding locking mechanism 2, and connecting multiple enclosure frames 1 together, which is convenient for folding and adapting to foundation pits of different sizes. When the block return spring 33 is lifted up by the vertical block 32, the top is compressed and stored by the driven downward pressure block 24, and the block limit column 34 can rotate to adapt to the rotation of the vertical block 32, and they are engaged with each other, without affecting the up and down movement while maintaining synchronous rotation.

[0042] The bottom support mechanism 4 includes an outer movable column 41, which is slidably connected to the inner surface of the enclosure frame 1, a trigger ring 411 is fixedly connected to the outer surface of the outer movable column 41, an inner movable column 42 is slidably connected to the inner surface of the outer movable column 41, a connecting ring 421 is fixedly connected to the bottom surface of the inner movable column 42, an outer surface of the connecting ring 421 is hingedly connected to an articulated connecting arm 4211, the other end of the articulated connecting arm 4211 is hingedly connected to a driven push-pull seat 4212, a driven direct-acting seat 4213 is fixedly connected to the bottom surface of the driven push-pull seat 4212, and a side insertion cone is provided on the outer surface of the driven direct-acting seat 4213 42131, the bottom surface of the inner movable column 42 is fixedly connected with a connection limit column 422, the top surface of the inner movable column 42 is fixedly connected with a control handle 43, the bottom surface of the outer movable column 41 is fixedly connected with a bottom shell 44, the outer surface of the bottom shell 44 is provided with a side cone through groove 441, the bottom surface of the bottom shell 44 is fixedly connected with a bottom insertion cone 45, through the setting of the bottom support mechanism 4, during use, the outer movable column 41 and the inner movable column 42 are installed inside the enclosure frame 1 and pass through the folding locking mechanism 2, the outer movable column 41 and the inner movable column 42 are interference fit and meshed with each other, can rotate synchronously but The inner movable column 42 is rotated and pressed down by the control handle 43 without affecting the sliding of the inner movable column 42 in the outer movable column 41, so that the outer movable column 41 drives the bottom insertion cone 45 to rotate and drill into the bottom of the foundation pit, which is used to press down the entire bottom support mechanism 4 until the trigger ring 411 on the outer movable column 41 contacts the top of the enclosure frame 1. At this time, the outer movable column 41 cannot continue to descend. Continuing to press down the inner movable column 42 will cause it to slide downward in the outer movable column 41, thereby pressing down the connecting ring 421 in the bottom shell 44. The descent of the connecting ring 421 drives the four hinged connecting arms 4211 to move outward, and pushes the driven push-pull seat 4212 and the slave push-pull seat 4212 to move outward. The dynamic direct-acting seat 4213 extends out of the bottom shell 44, and the side insertion cone 42131 on the driven direct-acting seat 4213 will be inserted into the underground of the foundation pit from the side. The size of the bottom insertion cone 45 underground is larger to clamp the entire bottom support mechanism 4, and when the connecting ring 421 drops to the bottom, the hinged connecting arm 4211 is horizontal. At this time, if the insertion cone 42131 on any side of the driven direct-acting seat 4213 is squeezed, the direction of the force at this time is the dead point position and will pass through the connecting ring 421, with an angle of zero, which plays a self-locking role, preventing the driven direct-acting seat 4213 and the side insertion cone 42131 from being squeezed by the underground of the foundation pit during construction and affecting the supporting effect.

[0043] A groove is provided in the outer movable column 41 and a protrusion is provided outside the inner movable column 42, which are meshed with each other. The outer movable column 41 and the inner movable column 42 are interference fit. There are four hinged connecting arms 4211, and the four hinged connecting arms 4211 are distributed in a ring around the connecting ring 421. There are four side cone passing grooves 441, and the four side cone passing grooves 441 are distributed in a ring around the bottom shell 44. The side cone passing grooves 441 are slidably connected to the driven direct-acting seat 4213 and the driven push-pull seat 4212. The connecting limit column 422 penetrates to the inner surface of the bottom insertion cone 45. The outer movable column 41 penetrates the fixed base 21, the bottom fixed cylinder 211, the top fixed cylinder 212, the rotating base 22 and the block base 224. The outer movable column 41 is rotatably connected to the rotating connecting arm 252. The outer movable column 41 and the inner movable column 42 are connected in a It rotates synchronously but does not affect the sliding of the inner movable column 42 in the outer movable column 41. Multiple hinged connecting arms 4211 disperse the force. The side cone passes through the groove 441 for the driven direct-acting seat 4213 and the side insertion cone 42131 to pass through the bottom shell 44 into the underground of the foundation pit. The connecting limit column 422 limits the moving path of the connecting ring 421 to prevent the position from shifting during descent. The outer movable column 41 is rotatably connected to the rotating connecting arm 252. When the outer movable column 41 rotates, the rotating connecting arm 252 can still be at the top of the driven pressing block 24. When the outer movable column 41 is pressed down, it can pass through the fixed base 21, the bottom fixed cylinder 211, the top fixed cylinder 212, the rotating base 22 and the block base 224 without being affected, and the rotating connecting arm 252 is pressed down to merge the bottom fixed cylinder 211 and the top fixed cylinder 212.

[0044] In this embodiment, Figure 1 , Figure 2 As shown, the enclosure frame 1 is the main part of the entire bracket structure, which is used to provide support and installation position, and the connection installation groove 11, the sliding connection groove 12, and the connection snap-fit ​​groove 13 are used for various mechanisms to restrict them on the enclosure frame 1 and provide activity space;

[0045] In this embodiment, Figure 3 As shown, the rotating base 22 and the hinged sliding block 231 are both rotated 90 degrees to make the enclosure frames 1 on both sides stick together for folding and storage and transportation.

[0046] In this embodiment, Figure 4 , Figure 5 , Figure 7 As shown, the bottom fixed cylinder 211 and the top fixed cylinder 212 are connected to form a complete cylinder through the fixed cylinder connecting column 2112. The bottom fixed cylinder 211 and the top fixed cylinder 212 are both slidably connected to the rotating base 22. At this time, there is no obstruction on the top, and the block base 224 can be forced to continue to rotate so that the block base 224 is lifted and enters the next groove, which is used to position the two sides of the enclosure frame 1 at a rotation angle of 90 degrees and 180 degrees;

[0047] In this embodiment, Figure 6 As shown, the distance between the bottom fixing cylinder 211 and the top fixing cylinder 212 is reduced, and the path block 2241 cannot pass through and can only be stuck in the groove of the bottom path groove 2111, which is used to fix the rotation angle of the enclosure frame 1 on both sides;

[0048] In this embodiment, Figure 8 , Fig. 9 As shown, the folding locking mechanism 2 is not connected to the enclosure frame 1 in the initial state. When connection is required, the vertical clamping block 32 is rotated by rotating the toggle block 322 to make it contact the inclined groove 321 facing the connection installation groove 11, and one side of the fixed base 21 is pushed into the connection installation groove 11, and the vertical clamping block 32 is ejected downward by the clamping block return spring 33 and sinks into the connection clamping groove 13, and multiple enclosure frames 1 are connected together, which is convenient for folding and adapting to foundation pits of different sizes;

[0049] In this embodiment, Fig.10 As shown, the outer movable column 41 is rotatably connected to the rotating connecting arm 252. When the outer movable column 41 rotates, the rotating connecting arm 252 can still be located at the top of the driven lower pressing block 24;

[0050] In this embodiment, Fig.11 As shown, the outer movable column 41 and the inner movable column 42 rotate synchronously without affecting the sliding of the inner movable column 42 in the outer movable column 41;

[0051] In this embodiment, Fig.12 , Fig.13 As shown, the inner movable column 42 presses down the connecting ring 421 in the bottom shell 44. The connecting ring 421 descends and drives the four hinged connecting arms 4211 to move outward, and pushes the driven push-pull seat 4212 and the driven direct-moving seat 4213 to extend out of the bottom shell 44. The side insertion cone 42131 on the driven direct-moving seat 4213 will be inserted into the underground of the foundation pit from the side. The hinged connecting arm 4211 is horizontal at this time, which is the dead point position. The direction of the force will pass through the connecting ring 421, and the angle is zero, which plays a self-locking role.

[0052] A method for using a support structure for foundation pit protection comprises the following steps:

[0053] S1. In the initial state of the folding locking mechanism 2, only the hinged base 23, the hinged sliding block 231 and the sliding limit block 232 are connected to the enclosure frame 1 in the sliding connection groove 12, and the fixed base 21 is not connected to the enclosure frame 1. The vertical clamping block 32 is rotated to make the contact inclined groove 321 face the connecting installation groove 11, and one side of the fixed base 21 is pushed into the connecting installation groove 11. The connecting installation groove 11 contacts the inclined surface of the contact inclined groove 321 to lift it up, and the vertical clamping block 32 continues to move inward until it contacts the connecting engaging groove 13. The vertical clamping block 32 is ejected downward by the clamping block reset spring 33 and sinks into the connecting engaging groove 13. At this time, the connection is completed, and multiple enclosure frames 1 are connected together, which is convenient for folding and adapting to foundation pits of different sizes;

[0054] S2. When the articulated base 23 and the articulated sliding block 231 are inside the sliding connection groove 12, the connection is stuck and cannot rotate. After the articulated base 23 and the articulated sliding block 231 are removed from the sliding connection groove 12, the distance between the enclosure frame 1 connected to the rotating base 22 and the enclosure frame 1 connected to the fixed base 21 increases, and at this time, the rotating base 22 and the articulated sliding block 231 are both rotated 90 degrees to make the enclosure frames 1 on both sides stick together, so as to be folded for easy storage and transportation;

[0055] S3, the bottom fixed cylinder 211 and the top fixed cylinder 212 are connected to form a complete cylinder through the fixed cylinder connecting column 2112. In the initial state, the top fixed cylinder 212 is lifted up by the lifting spring 21121. The distance between the bottom fixed cylinder 211 and the top fixed cylinder 212 is enough for the path block 2241 to pass through. When the rotating base 22 rotates, it will drive the enclosure frames 1 on both sides to rotate, and when it rotates to ninety degrees and one hundred and eighty degrees, the path block 2241 will be stuck in the groove of the bottom path groove 2111. At this time, there is no obstruction on the top, and it can be forced to continue to rotate so that the block base 224 is lifted up and enters the next groove, which is used to position the enclosure frames 1 on both sides at the ninety and one hundred and eighty degree rotation angles;

[0056] S4. After the rotation angle of the enclosure frame 1 is determined, the inner movable column 42 is rotated and pressed down by the control handle 43, so that the outer movable column 41 drives the bottom insertion cone 45 to rotate and drill into the bottom of the foundation pit, driving the rotating connecting arm 252 and the active downward pressing ring 251 on the surface to press down on the top fixed cylinder 212, and the distance between the bottom fixed cylinder 211 and the top fixed cylinder 212 is reduced. The path block 2241 cannot pass through and can only be stuck in the groove of the bottom path groove 2111, fixing the rotation angle of the enclosure frames 1 on both sides, and the outer movable column 41 drives the bottom insertion cone 45 to rotate and drill into the bottom of the foundation pit until the trigger ring 411 on the outer movable column 41 contacts the top of the enclosure frame 1. Continuing to press down the inner movable column 42 will cause it to slide downward in the outer movable column 41 and press down the connecting ring 421, driving the four articulated connecting arms 4211 to push the driven push-pull seat 4212 and the driven direct-moving seat 4213 outward, extending from the inside of the bottom shell 44 to the outside, and the side insertion cone 42131 on the driven direct-moving seat 4213 will be inserted into the ground of the foundation pit from the side to clamp the entire maintenance.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A support structure for foundation pit enclosure, comprising an enclosure frame (1), characterized in that: The inner surface of the enclosure frame (1) is provided with a connection installation groove (11), the inner surface of the enclosure frame (1) is provided with a sliding connection groove (12), the inner surface of the enclosure frame (1) is provided with a connection clamping groove (13), the inner surface of the connection installation groove (11) is provided with a folding locking mechanism (2), the outer surface of the folding locking mechanism (2) is provided with a connection mechanism (3), and the inner surface of the enclosure frame (1) is provided with a bottom support mechanism (4); The folding locking mechanism (2) comprises a fixed base (21), the fixed base (21) being snap-connected to the inner surface of the connecting installation groove (11), the top surface of the fixed base (21) being fixedly connected to a bottom fixed cylinder (211), the top surface of the bottom fixed cylinder (211) being provided with a bottom path groove (2111), the top surface of the bottom fixed cylinder (211) being fixedly connected to a fixed cylinder connecting column (2112), the top surface of the fixed cylinder connecting column (2112) being fixedly connected to a lifting spring (21121), the outer surface of the fixed cylinder connecting column (2112) being slidably connected to the top fixed cylinder (212), the bottom surface of the top fixed cylinder (212) being provided with a top path groove (2121), the inner side of the top fixed cylinder (212) being slidably connected to a rotating base (22), the bottom surface of the rotating base (22) being provided with a vertical movable groove (221), the The inner surface of the vertical movable groove (221) is fixedly connected to an ejection spring (222), the bottom surface of the ejection spring (222) is fixedly connected to a block base (224), the outer surface of the block base (224) is fixedly connected to a path block (2241), the outer surface of the rotating base (22) is fixedly connected to a hinged base (23), one end of the hinged base (23) is hingedly connected to a hinged sliding block (231), the top surface of the hinged sliding block (231) is fixedly connected to a sliding limit block (232), the outer surface of the top fixed cylinder (212) is fixedly connected to a driven pressing block (24), the inner surface of the driven pressing block (24) is slidably connected to a vertical moving column (25), the outer surface of the vertical moving column (25) is fixedly connected to an active pressing ring (251), and the top surface of the vertical moving column (25) is fixedly connected to a rotating connecting arm (252).

2. A support structure for foundation pit protection according to claim 1, characterized in that: The bottom fixed cylinder (211) and the top fixed cylinder (212) are both slidably connected to the rotating base (22); the number of the fixed cylinder connecting columns (2112) is three; the top surface of the jacking spring (21121) is fixedly connected to the top fixed cylinder (212); the block base (224) is slidably connected to the inner surface of the vertical movable groove (221); a groove provided in the vertical movable groove (221) and a protrusion provided outside the block base (224) are engaged with each other; the path block (2241) is slidably connected to the bottom path groove (2111) and the top path groove (2121); the hinged base (23), the hinged sliding block (231) and the sliding limit block (232) are all slidably connected to the inner surface of the sliding connection groove (12); and the bottom surface of the active down-pressing ring (251) is slidably connected to the top surface of the driven down-pressing block (24).

3. A support structure for foundation pit protection according to claim 1, characterized in that: The connecting mechanism (3) comprises a card block movable groove (31), the card block movable groove (31) is provided on the outer surface of the fixed base (21), the inner surface of the card block movable groove (31) is slidably connected to a vertical card block (32), the bottom surface of the vertical card block (32) is provided with a contact inclined groove (321), the outer surface of the vertical card block (32) is fixedly connected to a rotating toggle block (322), the top surface of the vertical card block (32) is fixedly connected to a card block reset spring (33), and the inner surface of the vertical card block (32) is slidably connected to a card block limiting column (34).

4. A support structure for foundation pit protection according to claim 3, characterized in that: The vertical clamping block (32) penetrates the inner surface of the connecting clamping groove (13), the contact inclined groove (321) is slidably connected to the inner surface of the connecting clamping groove (13), the top surface of the clamping block return spring (33) is fixedly connected to the bottom surface of the driven downward pressing block (24), the clamping block limiting column (34) is rotatably connected to the bottom surface of the driven downward pressing block (24), and the clamping block return spring (33) is sleeved on the outer surface of the clamping block limiting column (34).

5. The support structure for foundation pit protection according to claim 1, characterized in that: The bottom support mechanism (4) comprises an outer movable column (41), the outer movable column (41) being slidably connected to the inner surface of the enclosure frame (1), the outer surface of the outer movable column (41) being fixedly connected to a trigger ring (411), the inner surface of the outer movable column (41) being slidably connected to an inner movable column (42), the bottom surface of the inner movable column (42) being fixedly connected to a connecting ring (421), the outer surface of the connecting ring (421) being hingedly connected to an articulated connecting arm (4211), the other end of the articulated connecting arm (4211) being hingedly connected to a driven push-pull seat (4212), the driven push-pull seat (4212) being fixedly connected to the inner surface of the outer movable column (41), and the inner surface of the inner movable column (421) being hingedly connected to an articulated connecting arm (4211). The bottom surface of the pull seat (4212) is fixedly connected to a driven direct-acting seat (4213), the outer surface of the driven direct-acting seat (4213) is provided with a side insertion cone (42131), the bottom surface of the inner movable column (42) is fixedly connected to a connection limit column (422), the top surface of the inner movable column (42) is fixedly connected to a control handle (43), the bottom surface of the outer movable column (41) is fixedly connected to a bottom shell (44), the outer surface of the bottom shell (44) is provided with a side cone passing groove (441), and the bottom surface of the bottom shell (44) is fixedly connected to a bottom insertion cone (45).

6. A support structure for foundation pit protection according to claim 5, characterized in that: The groove formed in the outer movable column (41) and the protrusion formed on the outer side of the inner movable column (42) are meshed with each other, the outer movable column (41) and the inner movable column (42) are interference fit, the number of the hinged connection arms (4211) is four, and the four hinged connection arms (4211) are distributed in a ring around the connection ring (421), the number of the side cone passing grooves (441) is four, and the four side cone passing grooves (441) are distributed in a ring around the bottom shell (44), the The side cone is slidably connected to the driven linear seat (4213) and the driven push-pull seat (4212) through the groove (441); the connection limit column (422) penetrates the inner surface of the bottom insertion cone (45); the outer movable column (41) penetrates the fixed base (21), the bottom fixed cylinder (211), the top fixed cylinder (212), the rotating base (22) and the block base (224); and the outer movable column (41) is rotatably connected to the rotating connecting arm (252).

7. A method for using a support structure for foundation pit enclosure, using the support structure for foundation pit enclosure according to any one of claims 1 to 6, characterized in that: The steps include: S1, in the initial state of the folding locking mechanism (2), only the hinged base (23), the hinged sliding block (231) and the sliding limit block (232) are connected to the enclosure frame (1) in the sliding connection groove (12), and the fixed base (21) is not connected to the enclosure frame (1). The vertical clamping block (32) is rotated so that the contact inclined groove (321) faces the connection installation groove (11), and one side of the fixed base (21) is pushed into the connection installation groove (11). The connection installation groove (11) contacts the inclined surface of the contact inclined groove (321) to lift it up. The vertical clamping block (32) continues to move inward until it contacts the connection locking groove (13). The vertical clamping block (32) is ejected downward by the clamping block reset spring (33) and sinks into the connection locking groove (13). At this time, the connection is completed, and multiple enclosure frames (1) are connected together, which is convenient for folding and adapting to foundation pits of different sizes; S2. When the hinged base (23) and the hinged sliding block (231) are inside the sliding connection groove (12), the connection is stuck and cannot rotate. After the hinged base (23) and the hinged sliding block (231) are removed from the sliding connection groove (12), the distance between the enclosure frame (1) connected to the rotating base (22) and the enclosure frame (1) connected to the fixed base (21) increases, and at this time, the rotating base (22) and the hinged sliding block (231) are both rotated ninety degrees so that the enclosure frames (1) on both sides can be attached together, so as to be folded for easy storage and transportation; S3, the bottom fixed cylinder (211) and the top fixed cylinder (212) are connected via the fixed cylinder connecting column (2112) to form a complete cylinder. In the initial state, the lifting spring (21121) lifts the top fixed cylinder (212). The distance between the bottom fixed cylinder (211) and the top fixed cylinder (212) is sufficient for the path block (2241) to pass through. When the rotating base (22) rotates, it drives the enclosure frames (1) on both sides to rotate. When the rotation reaches 90 degrees and 180 degrees, the path block (2241) is stuck in the groove of the bottom path groove (2111). At this time, there is no obstruction on the top, and the block base (224) can be forced to continue to rotate so that the block base (224) is lifted up and enters the next groove, which is used to position the enclosure frames (1) on both sides at the rotation angles of 90 degrees and 180 degrees. S4. After the rotation angle of the enclosure frame (1) is determined, the inner movable column (42) is rotated and pressed downward by the control handle (43), so that the outer movable column (41) drives the bottom insertion cone (45) to rotate and drill into the bottom of the foundation pit, driving the rotating connecting arm (252) and the active downward pressing ring (251) on the surface to press down on the top fixed cylinder (212), so that the distance between the bottom fixed cylinder (211) and the top fixed cylinder (212) is reduced, and the path block (2241) cannot pass through and can only be stuck in the groove of the bottom path groove (2111), thereby fixing the rotation angle of the enclosure frames (1) on both sides. The outer movable column (41) drives the bottom insertion cone ( 45) rotate and drill into the bottom of the foundation pit until the trigger ring (411) on the outer movable column (41) contacts the top of the enclosure frame (1), and continue to press down the inner movable column (42) so that it slides downward inside the outer movable column (41) and presses down the connecting ring (421), driving the four hinged connecting arms (4211) to push the driven push-pull seat (4212) and the driven direct-acting seat (4213) outward, so that the driven push-pull seat (4212) and the driven direct-acting seat (4213) extend from the inside of the bottom shell (44) to the outside, and the side insertion cone (42131) on the driven direct-acting seat (4213) is inserted into the ground of the foundation pit from the side to clamp the entire enclosure structure.

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