Enclosure type supporting system of foundation pit

Abstract

The invention discloses an enclosure type supporting system of a foundation pit, which comprises protective panels connected end to end, a bracket is arranged between two adjacent protective panels, the bracket is provided with four movable frames, four corners of each protective panel are provided with mounting positions, and the four movable frames are mounted on the four mounting positions on the abutting sides of the two adjacent protective panels; a connecting plate is arranged between every two adjacent supports, and the multiple supports are connected through the multiple connecting plates to form the enclosure type supporting system. And the brackets on the upper layer are mounted on the connecting plates on the lower layer to construct the three-dimensional enclosure type supporting system. A circle of mutually-associated supporting structures are arranged along the surface of the foundation pit to construct the enclosure type supporting system to share loads of all areas, the supporting capacity of the enclosure type supporting system to the shallow foundation pit is improved, the multiple circles of mutually-associated supporting structures are longitudinally connected in a longitudinal connection mode to construct the three-dimensional enclosure type supporting system, and the supporting capacity of the foundation pit is improved. Loads of all the areas are shared in a stepped mode, and the supporting capacity of the deep foundation pit is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of infrastructure engineering, and in particular to an enclosure-type support system for a foundation pit. Background Art

[0002] Foundation pit support refers to the support measures taken during construction to ensure slope stability during excavation, prevent surrounding soil collapse, and protect adjacent buildings and underground pipelines. Currently, foundation pit support typically utilizes a single-plate, multi-support approach. This approach features a guard plate positioned against the inner wall of the foundation pit. Multiple support rods, tilted and supported on the ground, are installed on the guard plate to support the surface of the foundation pit, while multiple guard plates provide cover support for the inner wall of the foundation pit.

[0003] While this single-panel, multi-support system can provide support and protection for the inner wall of the foundation pit, each guard plate requires at least two support rods, consuming a large number of support rods. Furthermore, the guard plates and support rods are not interconnected, resulting in limited support strength for each guard plate, making it difficult to provide strong support. Furthermore, for deeper foundation pits, the guard plate coverage is limited, making it difficult to effectively support the upper portion of the pit.

[0004] Therefore, a single-plate multi-support method is currently used to cover the inner wall support of the foundation pit. Since each plate and each support rod are relatively independent, it is difficult for each plate and each support rod to provide strong supporting force, and it is difficult to form effective support for the upper part of the foundation pit for deep foundation pits. Summary of the Invention

[0005] The purpose of the present invention is to provide a retaining support system for a foundation pit, so as to solve the technical problems in the prior art that each plate and each support rod are relatively independent, resulting in that each plate and each support rod is difficult to provide strong supporting force, and it is difficult to form effective support for the upper part of the foundation pit for a deep foundation pit.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A retaining support system for a foundation pit, comprising guard panels, which are sequentially arranged around the inner wall of the foundation pit and connected end to end; a bracket is provided between two adjacent guard panels, the bracket having four movable frames, and mounting positions at the four corners of the guard panels; the four movable frames can be horizontally adjusted in spacing and mounted on the four mounting positions on the abutting sides of two adjacent guard panels; and the lower ends of the brackets are tilted and supported on the ground to support the two adjacent guard panels against the inner wall of the foundation pit to form protection;

[0008] Wherein, a connecting plate is provided between two adjacent brackets, a plurality of the brackets are connected by the plurality of connecting plates, and a plurality of the guard panels are connected by a plurality of the brackets and a plurality of the movable frames to construct an enclosure support system;

[0009] When the protective panels are arranged in multiple layers around the inner wall of the foundation pit, the lower end of the bracket of the upper layer can be installed on the connecting plate of the lower layer to form a three-dimensional enclosure support system.

[0010] As a preferred solution of the present invention, the movable frame includes a connecting cylinder, the fixed portion of the connecting cylinder is rotatably mounted on the bracket, and the telescopic portion of the connecting cylinder is movably mounted with an assembly plate, which is fastened to the mounting position by bolts to adapt to the angle change of two adjacent guard panels;

[0011] A shaft column is provided on the fixed part of the connecting cylinder, and the end of the shaft column is rotatably mounted on the bracket, and a threaded section is provided at the end of the shaft column. The threaded section of the shaft column can be locked on the bracket by a nut to limit the rotation of the shaft column and the connecting cylinder.

[0012] As a preferred solution of the present invention, the connecting cylinder includes a cylinder body and a piston cylinder rod, the piston portion of the piston cylinder rod slides in the cylinder body to form two chambers, and the rod portion of the piston cylinder rod passes through the piston portion;

[0013] A channel is provided in the piston cylinder rod, and two ports of the channel are respectively located on both sides of the piston portion of the piston cylinder rod to connect the two chambers;

[0014] A valve mechanism is provided in the channel, wherein the valve core portion of the valve mechanism is placed in the channel, and the control portion thereof extends along the rod portion of the piston cylinder rod to the outside of the cylinder body and the piston cylinder rod, so as to operate the valve mechanism outside the connecting cylinder to control the opening and closing state of the channel;

[0015] When the valve mechanism opens the channel, the two chambers are connected and the piston cylinder rod is free to move axially, or when the valve mechanism closes the channel, the two chambers are cut off and the piston cylinder rod is restricted in movement.

[0016] As a preferred solution of the present invention, before the assembly plate is fastened to the installation position by bolts, the control portion of the valve mechanism is rotated to control the valve core portion of the valve mechanism to conduct the channel, and the connecting cylinder is adaptively extended and retracted to facilitate the adjustment of the position of the assembly plate to align with the installation position;

[0017] After the assembly plate is fastened to the installation position by bolts, the control part of the valve mechanism is rotated in the reverse direction to control the valve core part of the valve mechanism to close the channel, and the connecting cylinder is restricted from extending and retracting to provide support for the assembly plate and the guard plate.

[0018] As a preferred embodiment of the present invention, the valve mechanism includes a core tube, which is rotatably installed in the channel to abut against the inner wall of the channel and block the two ports of the channel. Two holes are provided on the core tube. When the two holes of the core tube are rotated to align with the two ports of the channel, the channel connects the two chambers, or when the two holes of the core tube are rotated to control the two ports of the channel to have no overlapping area, the two chambers are closed.

[0019] A transmission cavity is provided in the outer end of the piston cylinder rod, and the end of the core tube away from the channel is closed and extends into the transmission cavity. A valve knob is rotatably mounted on the outer end of the piston cylinder rod, and the shaft end of the valve knob is perpendicular to the axis of the piston cylinder rod and inserted into the transmission cavity. The shaft end of the valve knob is connected to the closed end of the core tube through a gear transmission.

[0020] A limiting structure is provided between the valve knob located outside the piston cylinder rod and the piston cylinder rod to limit the rotation angle of the valve knob so that when the valve knob is rotated in the forward direction to the limit position, the two holes of the core tube are completely aligned with the two ports of the channel, and when the valve knob is rotated in the reverse direction to the limit position, the two holes of the core tube and the two ports of the channel have no overlapping area.

[0021] As a preferred embodiment of the present invention, the bracket includes a first channel steel, two support cylinders are rotatably mounted on the upper portion of the first channel steel, the fixed portion of the support cylinder is mounted inside the first channel steel, and a second channel steel is commonly mounted on the telescopic portions of the two support cylinders, and the four connecting cylinders are symmetrically mounted on the two end sides of the second channel steel;

[0022] The telescopic length of the support cylinder located below is greater than the telescopic length of the support cylinder located above, so that the first channel steel is tilted so that its lower end is away from the guard panel to form an inclined column support.

[0023] As a preferred solution of the present invention, two short channel steels are detachably provided on the second channel steel, the two short channel steels are respectively arranged on the outsides of the two support cylinders, and the two support cylinders are detachably connected to the second channel steel;

[0024] Axle frames are provided on both sides of the short channel steel, and the shaft column is rotatably mounted on the axle frames so as to adjust the distance between the upper and lower connecting cylinders by disassembling and assembling the short channel steel.

[0025] As a preferred solution of the present invention, the connecting plate includes a first corrugated beam and a second corrugated beam, the first corrugated beam is installed at the upper ends of two adjacent first channel steels, and the second corrugated beam is installed at the lower ends of two adjacent first channel steels;

[0026] The first corrugated beam and the second corrugated beam are both provided with a plurality of longitudinally distributed strip openings, and the strip openings are used to insert bolts to detachably fix the first corrugated beam and the second corrugated beam to the first channel steel;

[0027] The first corrugated beam and the second corrugated beam connect multiple first channel steels on the same layer to form a three-dimensional inclined column support structure surrounding the interior of the foundation pit to share the load.

[0028] As a preferred solution of the present invention, the first corrugated beam and the second corrugated beam can be bent toward the corrugated surface to adapt to being installed on two first channel steels at different angles, and the butt ends of two adjacent first corrugated beams and the butt ends of two adjacent second corrugated beams can be stacked and aligned with the strip openings thereon to be installed together on the same first channel steel;

[0029] The lower end of the first channel steel of the upper layer can be installed at the joint of the first corrugated beam, that is, the outside of the first channel steel of the lower layer, or in the area of the first corrugated beam between two adjacent first channel steels by bolts.

[0030] As a preferred solution of the present invention, a plurality of square steels are detachably mounted on the first corrugated beam through the strip-shaped opening and the bolts, and the square steels can be detachably mounted on the first channel steel;

[0031] The square steel can be disassembled and adjusted to be installed on the first corrugated beam, so as to adjust the installation position according to the distance between two adjacent first channel steels, and the square steel can make up for the connection gap between the first channel steel of the upper layer and the first channel steel of the lower layer supported by the same slope.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention sets up a circle of interconnected support structures along the surface of the foundation pit to construct an enclosure support system to share the load of each area, thereby improving its support capacity for shallow foundation pits, and longitudinally connects multiple circles of interconnected support structures through longitudinal connection to construct a three-dimensional enclosure support system to share the load of each area in a step-by-step manner, thereby effectively improving its support capacity for deep foundation pits. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0035] Figure 1 A schematic structural diagram of a foundation pit enclosure support system provided by an embodiment of the present invention;

[0036] Figure 2 A schematic structural diagram of the support portion of the enclosure support system for a foundation pit provided by an embodiment of the present invention;

[0037] Figure 3 A schematic structural diagram of a movable frame portion of a foundation pit enclosure support system provided by an embodiment of the present invention;

[0038] Figure 4 A schematic structural diagram of the connecting cylinder portion of the enclosure support system for a foundation pit provided by an embodiment of the present invention;

[0039] Figure 5 A schematic structural diagram of the core pipe portion of the enclosure support system for a foundation pit provided by an embodiment of the present invention;

[0040] Figure 6 Schematic diagram of the structure of the first corrugated beam portion of the enclosure support system for the foundation pit provided in an embodiment of the present invention.

[0041] The numbers in the figure represent the following:

[0042] 1-guard panel; 2-bracket; 3-movable frame; 4-connecting plate;

[0043] 11-installation position; 21-first channel steel; 22-second channel steel; 23-short channel steel; 24-support cylinder; 31-connecting cylinder; 32-assembly plate; 33-axis column; 41-first corrugated beam; 42-second corrugated beam; 43-strip opening; 44-square steel;

[0044] 231-shaft frame; 311-cylinder body; 312-piston cylinder rod; 313-channel; 314-core tube; 315-valve knob. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] like Figure 1As shown, the present invention provides an enclosure support system for a foundation pit, comprising guard panels 1, which are sequentially arranged around the inner wall of the foundation pit and connected end to end. A bracket 2 is provided between two adjacent guard panels 1, and the bracket 2 has four movable frames 3. The four corners of the guard panels 1 have mounting positions 11. The four movable frames 3 can be horizontally adjusted in spacing and are mounted on the four mounting positions 11 on the abutting sides of the two adjacent guard panels 1. The lower end of the bracket 2 is tilted and supported on the ground to support the two adjacent guard panels 1 against the inner wall of the foundation pit to form protection.

[0047] A connecting plate 4 is provided between two adjacent supports 2, multiple supports 2 are connected by multiple connecting plates 4, and multiple protective panels 1 are connected by multiple supports 2 and multiple movable frames 3 to form an enclosure support system;

[0048] When the protective panels 1 are sequentially arranged in multiple layers around the inner wall of the foundation pit, the lower end of the upper support 2 can be installed on the lower connecting plate 4 to construct a three-dimensional enclosure support system.

[0049] The present invention aims to set up a circle of interconnected support structures along the surface of the foundation pit to construct an enclosure support system to share the load of each area, thereby improving its support capacity for shallow foundation pits, and to longitudinally connect multiple circles of interconnected support structures through longitudinal connections to construct a three-dimensional enclosure support system to share the load of each area in a step-by-step manner, thereby effectively improving its support capacity for deep foundation pits.

[0050] Specifically:

[0051] The enclosure support system of the present invention mainly comprises the following steps: laying the protective panels 1 one by one along the wall of the foundation pit; during the laying process, each time a protective panel 1 is laid, a bracket 2 and a movable frame 3 are installed in the middle area between two adjacent protective panels 1 for support.

[0052] Among them, adjust the opening distance of the movable frame 3 so that its connecting end is aligned with the installation position 11 of the guard panel 1, and then fasten it to the guard panel 1 with bolts. After the four movable brackets 3 are respectively installed on the upper and lower installation positions 11 on the docking side of the two guard panels 1, the bracket 2 is tilted and supported on the ground to achieve edge support for the two guard panels 1.

[0053] After multiple guard panels 1 are arranged in a circle, any two adjacent guard panels 1 are supported by the brackets 2 and the movable frames 3, and the two sides of each guard panel 1 are supported by different brackets 2 and movable frames 3, so that the load on the guard panels 1 can be effectively shared, thereby improving the support capacity.

[0054] And for deeper foundation pits, after multiple protective panels 1 are laid in one circle to complete the support, another circle is laid upwards, and the upper-level brackets 2 are installed on the connecting plates 4 between the lower-level brackets 2. The connecting plates 4 can not only connect the lower-level brackets 2 to form a whole to share the load, but also disperse the upper-level load downward. The three-dimensional enclosure support system formed after the installation of multiple circles of laid protective panels 1 can achieve step-by-step load sharing and effectively improve the support capacity.

[0055] In addition, since the position of the movable frame 3 can be manually adjusted on the bracket 2, it can adapt to various specifications of the guard panels 1, and when the guard panels 1 are laid on the inner wall of the foundation pit due to protruding or recessed areas to produce docking angles, the movable frame 3 can also be matched and installed on the installation position of the arc panel 1, so that it can adapt to various paving conditions.

[0056] As can be seen from the above, the joints between the guard panels 1 at the same height may be concave inward or convex outward, resulting in changes in the angle and distance between the mounting positions 11 of the two adjacent guard panels 1 compared to when the two guard panels 1 are flatly connected. Therefore, in order to enable the movable frame 3 to adapt to more angle changes of the two guard panels 1, the following preferred embodiments are provided.

[0057] like Figure 2 、 Figure 3 As shown, the movable frame 3 includes a connecting cylinder 31, the fixed portion of the connecting cylinder 31 is rotatably mounted on the bracket 2, and the telescopic portion of the connecting cylinder 31 is movably mounted with an assembly plate 32, which is fastened to the mounting position 11 by bolts to adapt to the angle change of two adjacent guard panels 1;

[0058] A shaft column 33 is provided on the fixed part of the connecting cylinder 31, and the end of the shaft column 33 is rotatably mounted on the bracket 2, and a threaded section is provided at the end of the shaft column 33. The threaded section of the shaft column 33 can be locked on the bracket 2 by a nut to limit the rotation of the shaft column 33 and the connecting cylinder 31.

[0059] In this embodiment, the connecting cylinder 31 can rotate on the bracket 2 to adjust its deployment angle, and the assembly plate 32 can rotate on the connecting cylinder 31, so that the connecting cylinder 31 can be rotated to any angle and can be flatly installed on the mounting position 11 of the guard panel 1.

[0060] During this process, since the connecting cylinder 31 is mounted on the bracket 2 through the shaft column 33 and rotates, and the shaft column 33 has an end thread, after the connecting cylinder 31 is rotated to the appropriate position, that is, after the assembly plates 32 on the two connecting cylinders 31 are installed on two adjacent mounting positions 11, the shaft column 33 is locked on the bracket 2 through the nut and the end thread of the shaft column 33, thereby achieving angle fixation of the connecting cylinder 31.

[0061] Therefore, the movable frame 3 can adapt to the angle adjustment between adjacent guard panels 1 to change its deployment angle, and can be locked to provide supporting force after the installation is confirmed.

[0062] Of course, the extension and retraction of the connecting cylinder 31 is controlled by changes in the fluid pressure within it. However, during construction, it is often not possible to control the pressure of the pipelines connecting each connecting cylinder 31, making it difficult for the connecting cylinder 31 to independently adjust its length and self-lock. Therefore, in order to maintain the supporting force of the connecting cylinder 31 at a fixed angle, the following preferred embodiment is provided.

[0063] like Figure 3 、 Figure 4 As shown, the connecting cylinder 31 includes a cylinder body 311 and a piston cylinder rod 312. The piston portion of the piston cylinder rod 312 slides in the cylinder body 311 to form two chambers, and the rod portion of the piston cylinder rod 312 passes through the piston portion.

[0064] A channel 313 is provided in the piston cylinder rod 312, and two ports of the channel 313 are respectively located on both sides of the piston portion of the piston cylinder rod 312 to connect the two chambers;

[0065] A valve mechanism is provided in the channel 313. The valve core of the valve mechanism is placed in the channel 313, and the control portion thereof extends along the rod of the piston cylinder rod 312 to the outside of the cylinder body 311 and the piston cylinder rod 312, so that the valve mechanism can be operated from the outside of the connecting cylinder 31 to control the opening and closing state of the channel 313.

[0066] When the valve mechanism opens the channel 313 , the two chambers are connected, and the piston cylinder rod 312 is free to move axially; or when the valve mechanism closes the channel 313 , the two chambers are cut off, and the piston cylinder rod 312 is restricted from moving.

[0067] In this embodiment, the two chambers in the cylinder body 311 are divided by the piston of the piston cylinder rod 312, and are connected through the channel 313 in the piston cylinder rod 312, so that the piston cylinder rod 312 can move freely axially in the cylinder body 311, and the channel 313 is controlled by the valve mechanism. When the valve mechanism is opened, the channel 313 is connected, and the piston cylinder rod 312 can move freely. When the valve mechanism is closed, the channel 313 is closed. Since the two chambers cannot be connected, the two chambers are difficult to be compressed, especially after the hydraulic oil is filled in the cavity, the piston cylinder rod 312 is difficult to move, thereby achieving stable support.

[0068] Of course, in order to facilitate the valve mechanism to control the active state and the locked state of the piston cylinder rod 312, the following preferred embodiments are provided.

[0069] like Figure 4 、 Figure 5As shown, before the assembly plate 32 is fastened to the mounting position 11 by bolts, the control portion of the rotary valve mechanism controls the valve core portion of the valve mechanism to open the conducting channel 313, and the connecting cylinder 31 adaptively expands and contracts, so that the assembly plate 32 can be adjusted to align with the mounting position 11;

[0070] After the assembly plate 32 is fastened to the mounting position 11 by bolts, the control portion of the valve mechanism is rotated in the reverse direction, the valve core portion of the control valve mechanism closes the channel 313 , and the connecting cylinder 31 is restricted from extending and retracting to provide support for the assembly plate 32 and the guard plate 1 .

[0071] In this embodiment, the valve core portion of the valve mechanism opens the channel 313 by rotating the control portion of the valve mechanism forward to the open position, or closes the channel 313 by rotating the control portion of the valve mechanism backward to the closed position.

[0072] Specifically, in order to facilitate the operation of the valve mechanism to rotate and control the channel 313 to open and close, the following preferred embodiments are provided.

[0073] like Figure 5 As shown, the valve mechanism includes a core tube 314, which is rotatably installed in the channel 313 to abut against the inner wall of the channel 313 and block the two ends of the channel 313. The core tube 314 is provided with two holes. When the two holes of the core tube 314 are rotated to align with the two ends of the channel 313, the channel 313 communicates with the two chambers. When the two holes of the core tube 314 are rotated to control the two ends of the channel 313 to have no overlapping area, the two chambers are closed.

[0074] A transmission cavity is provided in the outer end of the piston cylinder rod 312, and the end of the core tube 314 away from the channel 313 is closed and extends into the transmission cavity. A valve knob 315 is rotatably mounted on the outer end of the piston cylinder rod 312. The axial end of the valve knob 315 is perpendicular to the axis of the piston cylinder rod 312 and inserted into the transmission cavity. The axial end of the valve knob 315 is connected to the closed end of the core tube 314 via a gear transmission.

[0075] A limiting structure is provided between the valve knob 315 and the piston cylinder rod 312 to limit the rotation angle of the valve knob 315, so that when the valve knob 315 is rotated in the forward direction to the limit position, the two holes of the core tube 314 are completely aligned with the two ports of the channel 313, and when the valve knob 315 is rotated in the reverse direction to the limit position, the two holes of the core tube 314 and the two ports of the channel 313 have no overlapping area.

[0076] In this embodiment, the rotation of the valve knob 315 can rotate the core tube 314 through the gear transmission assembly in the transmission chamber, that is, when the valve knob 315 rotates forward, the core tube 314 rotates forward, and when the valve knob 315 rotates backward, the core tube 314 rotates backward.

[0077] Based on this, in order to avoid over-rotation or under-rotation, a limiting structure is set at the valve knob 315 and the piston cylinder rod 312, such as the key block and the arc groove in the tube. When the valve knob 315 is rotated to the positive rotation limit, the two holes of the core tube 314 are completely aligned with the two ports of the channel 313, and when it is rotated to the reverse rotation limit, the two holes of the core tube 314 and the two ports of the channel 313 have no overlap.

[0078] Since the core tube 314 rotates in the channel 313 and the two holes of the core tube 314 move tangentially with the port of the channel 313, the resistance to the movement of the core tube 314 is effectively reduced, making it easier to rotate and adjust the valve knob 315.

[0079] Of course, the movable frame 3 is used to connect two adjacent guard panels 1. When supporting, the bracket 2 needs to support the ground. Therefore, the bracket 2 needs to be connected to the movable frame 3 and be able to provide effective support for the movable frame 3. Based on this, the following preferred embodiments are provided.

[0080] like Figure 2 As shown, the bracket 2 includes a first channel steel 21, and two support cylinders 24 are rotatably mounted on the upper part of the first channel steel 21. The fixed parts of the support cylinders 24 are mounted inside the first channel steel 21, and the second channel steel 22 is commonly mounted on the telescopic parts of the two support cylinders 24. Four connecting cylinders 31 are symmetrically mounted on the two end sides of the second channel steel 22;

[0081] The telescopic length of the support cylinder 24 at the bottom is greater than that of the support cylinder 24 at the top, so that the first channel steel 21 is tilted so that its lower end is away from the guard panel 1 to form an oblique column support.

[0082] In this embodiment, the bracket 2 is composed of a first channel steel 21 and a support cylinder 24. The support cylinder 24 can rotate in the first channel steel 21, and the structure of the support cylinder 24 is the same as that of the connecting cylinder 31, and both can control the telescopic state.

[0083] The first channel steel 21 is connected to the second channel steel 22 through two supporting cylinders 24, and the second channel steel 22 is connected to the connecting cylinder 31. Therefore, after the length of the two supporting cylinders 24 is adjusted, the first channel steel 21 is tilted and deviates from the second channel steel 22, that is, a diagonal brace is formed for the second channel steel 22. After the connecting cylinder 31 is connected to the guard panel 1, the first channel steel 21 forms a diagonal brace for the guard panel 1.

[0084] Of course, in order to enable the bracket 2 and the movable frame 3 to match more protective panels 1 of different specifications, the following preferred embodiments are provided.

[0085] like Figure 2As shown, two short channel steels 23 are detachably provided on the second channel steel 22. The two short channel steels 23 are respectively provided on the outsides of the two support cylinders 24, and the two support cylinders 24 are detachably connected to the second channel steel 22.

[0086] Axle frames 231 are provided on both sides of the short channel steel 23 , and the shaft column 33 is rotatably mounted on the axle frames 231 so as to adjust the distance between the upper and lower connecting cylinders 31 by disassembling and assembling the short channel steel 23 .

[0087] In this embodiment, the short channel steel 23 can be detachably connected to the second channel steel 22, and the support cylinder 24 is installed on the second channel steel 22 through the short channel steel 23, so that the short channel steel 23 can be quickly disassembled to replace different support cylinders 24 according to different specifications of the protective panel 1, that is, an assembly of short channel steels 23 and support cylinders 24 of different specifications is available for backup.

[0088] In order to enable the connecting cylinder 31 to be movably installed on the short channel steel 23, an axis bracket 231 is provided on the side wall of the short channel steel 23 so that the shaft column 33 of the connecting cylinder 31 can be rotatably installed on the short channel steel 23, thereby facilitating the rotation adjustment of the connecting cylinder 31.

[0089] Of course, in order for the entire support system to form an integrated enclosure structure, adjacent first channel steels 21 need to be connected via connecting plates 4 to form a single unit. However, due to the uneven inner wall of the foundation pit, adjacent guard panels 1 are at certain angles, resulting in different distances and angles between adjacent first channel steels 21. In order to enable connecting plates 4 to connect any adjacent first channel steels 21, the following preferred embodiments are provided.

[0090] like Figure 1 、 Figure 6 As shown, the connecting plate 4 includes a first corrugated beam 41 and a second corrugated beam 42 , the first corrugated beam 41 is installed at the upper end of two adjacent first channel steels 21 , and the second corrugated beam 42 is installed at the lower end of two adjacent first channel steels 21 ;

[0091] The first corrugated beam 41 and the second corrugated beam 42 are both provided with a plurality of longitudinally distributed strip openings 43, and the strip openings 43 are used to insert bolts to detachably fix the first corrugated beam 41 and the second corrugated beam 42 to the first channel steel 21;

[0092] The first corrugated beam 41 and the second corrugated beam 42 connect the plurality of first channel steels 21 on the same layer to form a three-dimensional inclined column support structure surrounding the interior of the foundation pit to share the load.

[0093] In this embodiment, the first corrugated beams 41 and the second corrugated beams 42 have a strong longitudinal load-bearing capacity. Therefore, after connecting the two first channel steels 21, the upper first channel steel 21 can be installed on the horizontal first corrugated beam 41. Moreover, because adjacent first channel steels 21 are connected by the first corrugated beams 41 and the second corrugated beams 42, the multiple first channel steels 21 form a whole, which can share the load on each side of the guard panel 1, reduce the bearing capacity of a single first channel steel 21, and thus improve the support effect of the support system.

[0094] Of course, due to the irregularity of the inner wall of the foundation pit, the protective panel 1 will be laid at an angle, and when the angle changes, the distance between the two first channel steels 21 will change. Therefore, in order to enable the first corrugated beam 41 and the second corrugated beam 42 to be stably installed on the two adjacent first channel steels 21, the following preferred embodiment is provided.

[0095] like Figure 1 、 Figure 6 As shown, the first corrugated beam 41 and the second corrugated beam 42 can be bent toward the corrugated surface to adapt to being installed on two first channel steels 21 at different angles, and the butt ends of two adjacent first corrugated beams 41 and the butt ends of two adjacent second corrugated beams 42 can be stacked and aligned with the strip openings 43 thereon to be installed together on the same first channel steel 21;

[0096] The lower end of the upper first channel steel 21 can be installed at the joint of the first corrugated beam 41 by bolts, that is, the outside of the lower first channel steel 21, or installed in the area of the first corrugated beam 41 between two adjacent first channel steels 21.

[0097] In this embodiment, the first corrugated beam 41 and the second corrugated beam 42 can be bent toward the corrugated surface, so that when the angle between the two first channel steels 21 is an acute angle, the first corrugated beam 41 and the second corrugated beam 42 can bend inward to connect the two first channel steels 21, and when the angle between the two first channel steels 21 is an obtuse angle, the first corrugated beam 41 and the second corrugated beam 42 can bend outward to connect the two first channel steels 21, thereby effectively avoiding their length being too long and affecting installation.

[0098] However, when the upper first channel steel 21 is connected to the lower first corrugated beam 41, a certain gap will be generated between it and the lower first channel steel 21. Direct connection will cause the inclination of the upper first channel steel 21 to be insufficient and affect the supporting capacity. Therefore, the following preferred embodiment is provided.

[0099] like Figure 6 As shown, a plurality of square steels 44 are detachably mounted on the first corrugated beam 41 through strip openings 43 and bolts. The square steels 44 can be detachably mounted on the first channel steel 21.

[0100] The square steel 44 can be disassembled and adjusted to its position on the first corrugated beam 41 to adjust the installation position according to the distance between two adjacent first channel steels 21, and the square steel 44 can make up for the connection gap between the upper first channel steel 21 and the lower first channel steel 21 supported with the same slope.

[0101] In this embodiment, the square steel 44 can be installed on the first corrugated beam 41 through the strip opening 43, so that after the square steel 44 is installed, the first corrugated beam 41 is offset outward relative to the first channel steel 21, so that when the upper first channel steel 21 is connected to the first corrugated beam 41 through the square steel 44, the connection gap can be effectively filled, so that the upper first channel steel 21 maintains a suitable inclination.

[0102] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A foundation pit enclosure support system, characterized in that: The invention comprises a protective panel (1), wherein the protective panels (1) are sequentially arranged around the inner wall of the foundation pit and connected end to end, and a bracket (2) is provided between two adjacent protective panels (1), and the bracket (2) has four movable frames (3). The four corners of the protective panel (1) have mounting positions (11), and the four movable frames (3) can be horizontally adjusted in spacing and mounted on the four mounting positions (11) on the abutting sides of the two adjacent protective panels (1), and the lower end of the bracket (2) is tilted and supported on the ground to support the two adjacent protective panels (1) to press against the inner wall of the foundation pit to form protection; A connecting plate (4) is provided between two adjacent supports (2), a plurality of supports (2) are connected via the plurality of connecting plates (4), and a plurality of protective panels (1) are connected via the plurality of supports (2) and the plurality of movable frames (3), so as to construct an enclosure support system; When the protective panels (1) are sequentially arranged in multiple layers around the inner wall of the foundation pit, the lower ends of the brackets (2) of the upper layer can be mounted on the connecting plates (4) of the lower layer to form a three-dimensional enclosure support system.

2. The enclosure support system for foundation pit according to claim 1, characterized in that: The movable frame (3) includes a connecting cylinder (31), a fixed portion of the connecting cylinder (31) is rotatably mounted on the bracket (2), and a telescopic portion of the connecting cylinder (31) is movably mounted with an assembly plate (32), and the assembly plate (32) is fastened to the mounting position (11) by bolts to adapt to the angle change of two adjacent guard panels (1); A shaft column (33) is provided on the fixed portion of the connecting cylinder (31), and the end of the shaft column (33) is rotatably mounted on the bracket (2). A threaded section is provided at the end of the shaft column (33), and the threaded section of the shaft column (33) can be locked on the bracket (2) by a nut to limit the rotation of the shaft column (33) and the connecting cylinder (31).

3. The enclosure support system for foundation pit according to claim 2, characterized in that: The connecting cylinder (31) comprises a cylinder body (311) and a piston cylinder rod (312), wherein the piston portion of the piston cylinder rod (312) slides in the cylinder body (311) to form two chambers, and the rod portion of the piston cylinder rod (312) passes through the piston portion; A channel (313) is provided in the piston cylinder rod (312), and two ports of the channel (313) are respectively located on both sides of the piston portion of the piston cylinder rod (312) to connect the two chambers; A valve mechanism is provided in the channel (313), a valve core portion of the valve mechanism is placed in the channel (313), and a control portion thereof extends along the rod portion of the piston cylinder rod (312) to the outside of the cylinder body (311) and the piston cylinder rod (312), so as to operate the valve mechanism outside the connecting cylinder (31) to control the opening and closing state of the channel (313); When the valve mechanism opens the channel (313), the two chambers are connected and the piston cylinder rod (312) is free to move axially, or when the valve mechanism closes the channel (313), the two chambers are cut off and the piston cylinder rod (312) is restricted from moving.

4. The enclosure support system for foundation pit according to claim 3, characterized in that: Before the assembly plate (32) is fastened to the installation position (11) by bolts, the control portion of the valve mechanism is rotated to control the valve core portion of the valve mechanism to conduct the channel (313), and the connecting cylinder (31) is adaptively extended and retracted so that the assembly plate (32) can adjust its position to align with the installation position (11); After the assembly plate (32) is fastened to the mounting position (11) by bolts, the control portion of the valve mechanism is rotated in the reverse direction to control the valve core portion of the valve mechanism to shut off the channel (313), and the connecting cylinder (31) is restricted in its expansion and contraction to provide support for the assembly plate (32) and the guard plate (1).

5. The enclosure support system for foundation pit according to claim 4, characterized in that: The valve mechanism comprises a core tube (314), which is rotatably mounted in the channel (313) to abut against the inner wall of the channel (313) and block the two ports of the channel (313). Two holes are provided on the core tube (314). When the two holes of the core tube (314) are rotatably controlled to align with the two ports of the channel (313), the channel (313) communicates with the two chambers, or when the two holes of the core tube (314) are rotatably controlled to have no overlapping area with the two ports of the channel (313), the two chambers are closed. A transmission cavity is provided in the outer end of the piston cylinder rod (312), and one end of the core tube (314) away from the channel (313) is closed and extends into the transmission cavity. A valve knob (315) is rotatably mounted on the outer end of the piston cylinder rod (312), and the axial end of the valve knob (315) is perpendicular to the axis of the piston cylinder rod (312) and inserted into the transmission cavity. The axial end of the valve knob (315) is connected to the closed end of the core tube (314) through a gear transmission. A limiting structure is provided between the valve knob (315) and the piston cylinder rod (312) to limit the rotation angle of the valve knob (315), so that when the valve knob (315) is rotated in the forward direction to the limit position, the two holes of the core tube (314) are completely aligned with the two ports of the channel (313), and when the valve knob (315) is rotated in the reverse direction to the limit position, the two holes of the core tube (314) and the two ports of the channel (313) have no overlapping area.

6. A foundation pit enclosure support system according to any one of claims 2 to 5, characterized in that: The bracket (2) includes a first channel steel (21), two supporting cylinders (24) are rotatably mounted on the upper portion of the first channel steel (21), the fixed portion of the supporting cylinder (24) is mounted inside the first channel steel (21), and a second channel steel (22) is commonly mounted on the telescopic portions of the two supporting cylinders (24), and the four connecting cylinders (31) are symmetrically mounted on the two end sides of the second channel steel (22); The telescopic length of the support cylinder (24) located below is greater than the telescopic length of the support cylinder (24) located above, so that the first channel steel (21) is tilted so that its lower end is away from the guard panel (1), forming an inclined column support.

7. The enclosure support system for foundation pit according to claim 4, characterized in that: Two short channel steels (23) are detachably provided on the second channel steel (22), the two short channel steels (23) are respectively arranged on the outsides of the two support cylinders (24), and the two support cylinders (24) are detachably connected to the second channel steel (22); Axle frames (231) are provided on both sides of the short channel steel (23), and the shaft column (33) is rotatably mounted on the axle frames (231) so as to adjust the spacing between the upper and lower connecting cylinders (31) by disassembling the short channel steel (23).

8. The enclosure support system for foundation pit according to claim 6, characterized in that: The connecting plate (4) comprises a first corrugated beam (41) and a second corrugated beam (42), wherein the first corrugated beam (41) is mounted on the upper ends of two adjacent first channel steels (21), and the second corrugated beam (42) is mounted on the lower ends of two adjacent first channel steels (21); The first corrugated beam (41) and the second corrugated beam (42) are both provided with a plurality of longitudinally distributed strip-shaped openings (43), and the strip-shaped openings (43) are used to insert bolts to detachably fix the first corrugated beam (41) and the second corrugated beam (42) to the first channel steel (21); Furthermore, the first corrugated beam (41) and the second corrugated beam (42) connect a plurality of the first channel steels (21) on the same layer to form a three-dimensional inclined column support structure surrounding the interior of the foundation pit to share the load.

9. The enclosure support system for foundation pit according to claim 8, characterized in that: The first corrugated beam (41) and the second corrugated beam (42) can be bent toward the corrugated surface to adapt to being installed on two first channel steels (21) at different angles, and the butt ends of two adjacent first corrugated beams (41) and the butt ends of two adjacent second corrugated beams (42) can be stacked and aligned with the strip openings (43) thereon to be installed together on the same first channel steel (21); The lower end of the first channel steel (21) of the upper layer can be installed at the joint of the first corrugated beam (41), that is, the outer side of the first channel steel (21) of the lower layer, or installed in the area of the first corrugated beam (41) between two adjacent first channel steels (21) by means of bolts.

10. The enclosure support system for foundation pit according to claim 8, characterized in that: A plurality of square steels (44) are detachably mounted on the first corrugated beam (41) through the strip-shaped opening (43) and bolts, and the square steels (44) can be detachably mounted on the first channel steel (21); The square steel (44) can be disassembled and adjusted to be installed on the first corrugated beam (41), so as to adjust the installation position according to the distance between two adjacent first channel steels (21), and the square steel (44) can make up for the connection gap generated by supporting the first channel steel (21) of the upper layer and the first channel steel (21) of the lower layer with the same slope.

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