Deep foundation pit supporting structure capable of being quickly assembled

Abstract

The utility model discloses a deep foundation pit supporting structure capable of being quickly assembled. The deep foundation pit supporting structure comprises profile steel, a bottom layer connecting piece, a bolt connecting piece and a corner connecting piece. The profile steel is arranged in the depth direction of the deep foundation pit, and the multiple pieces of profile steel are arranged at intervals along the edge of the deep foundation pit. A plurality of bolt connecting pieces are sequentially inserted into the bottom-layer connecting pieces from bottom to top to form vertical connecting pieces, and every two adjacent pieces of profile steel in the same plane are connected through the corresponding vertical connecting pieces; every two adjacent vertical connecting pieces located on the two sides of the corresponding corner are connected through a corner connecting piece. The utility model relates to the technical field of foundation pit supporting, and can solve the problems that the splicing part of a steel sheet pile in the prior art is poor in pressure resistance and inconvenient to mount and hoist.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a deep foundation pit support structure which can be assembled quickly. Background Art

[0002] Foundation pit support is a measure of support, reinforcement and protection for the side walls and surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. As a structural system, foundation pit support should meet the requirements of stability and deformation. When existing foundation pit support uses steel support piles, the steel plates in the steel sheet pile support structure are simply spliced ​​by bolts and other means, which makes it easy for the steel plates to slide, or welding purlins and other components around the steel sheet piles makes the installation of the steel plates too complicated, affecting the installation speed and delaying the progress of the steel support pile project. In addition, the use of a single steel plate support is too weak, which reduces the compressive strength between adjacent steel sheet pile supports and easily affects the support effect of the steel sheet pile support.

[0003] On the other hand, for deep foundation pits, existing support projects use long steel enclosure panels in order to avoid the weak compressive strength of the connection points of simple assembly of shorter steel sections, or the installation of components such as purlins being too cumbersome. However, hoisting such a long structure requires sufficient hoisting height and suitable lifting equipment. This not only places high demands on hoisting machinery and hoisting technology, but in cities, the space around the foundation pit may be limited, which may have a huge impact on the feasibility and safety of the hoisting operation. Therefore, it is necessary to provide a deep foundation pit support structure that can be quickly assembled, which can solve the problems of poor compressive strength of the splicing parts of steel sheet piles and inconvenient installation and hoisting in the prior art. Summary of the invention

[0004] The utility model aims to provide a deep foundation pit supporting structure which can be assembled quickly, and can solve the problems in the prior art of poor compression resistance of the steel sheet pile joints and inconvenient installation and hoisting.

[0005] The utility model is achieved in this way:

[0006] A deep foundation pit support structure that can be quickly assembled comprises steel sections, bottom-layer connectors, latch connectors and corner connectors; the steel sections are arranged along the depth direction of the deep foundation pit, and a plurality of steel sections are arranged at intervals along the edge of the deep foundation pit; a plurality of latch connectors are sequentially plugged into the bottom-layer connector from bottom to top to form a vertical connector, and two adjacent steel sections in the same plane are connected by the vertical connector; and two adjacent vertical connectors located on both sides of the corner are connected by the corner connector.

[0007] The steel section comprises a panel and a connecting plate; the connecting plate is connected between two panels to form an H-shaped steel, and a plurality of mounting holes are formed at intervals on the connecting plate; a pair of bottom connecting pieces are embedded between the two panels and are arranged in close proximity to the connecting plate, and the pair of bottom connecting pieces are butted together through the mounting holes; a pair of latch connecting pieces are embedded between the two panels and are arranged in close proximity to the connecting plate, and the latch connecting pieces are butted together through the mounting holes.

[0008] A through groove is formed in the bottom connecting piece along the height direction, and the bottom connecting piece is plugged into the pin connecting piece through the through groove; a first side through groove connected to the through groove is formed on one side of the bottom connecting piece, and a first connecting tongue is formed on the other side of the bottom connecting piece; the bottom connecting piece on one side of the corner is plugged into one end of the corner connecting piece through the first connecting tongue, and the other end of the corner connecting piece is plugged into the first side through groove of the bottom connecting piece on the other side of the corner, and is locked and fixed by a movable pin; the first side through groove of the bottom connecting piece attached to one side of the connecting plate can be aligned with the mounting hole, and the first connecting tongue of the bottom connecting piece attached to the other side of the connecting plate can pass through the mounting hole and the first side through groove of the bottom connecting piece on one side of the connecting plate, and is locked and fixed by a movable pin.

[0009] A first groove opening upward is formed on the end of the first connecting tongue away from the underlying connecting piece, one end of the movable pin is inserted into the through groove of the underlying connecting piece on one side of the connecting plate through the pin body, and the other end of the movable pin is inserted into the first groove of the underlying connecting piece on the other side of the connecting plate through the clamping block.

[0010] The pin body is connected to the clamping block via a connecting portion, a first U-shaped groove is formed on a side surface of the first groove away from the bottom connecting piece, and the connecting portion passes through the first U-shaped groove.

[0011] A blind groove with a top opening is formed in the pin connector along the height direction, and a pin is formed at the bottom of the pin connector, so that the pin can be inserted into the through groove of the bottom connector, and the pin of the pin connector of the upper layer can be inserted into the blind groove of the pin connector of the next layer; a second side through groove connected to the blind groove is formed on one side of the pin connector, and a second connecting tongue is formed on the other side of the pin connector; the pin connector on one side of the corner is plugged with one end of the corner connector through the second connecting tongue, and the other end of the corner connector is plugged with the second side through groove of the pin connector on the other side of the corner, and is locked and fixed by a movable pin; the second side through groove of the pin connector attached to one side of the connecting plate can be aligned with the mounting hole, and the second connecting tongue of the pin connector attached to the other side of the connecting plate can pass through the mounting hole and the second side through groove of the pin connector on one side of the connecting plate, and is locked and fixed by a movable pin.

[0012] A second groove opening upward is formed on the end of the second connecting tongue away from the plug connector, one end of the movable pin is plugged into the blind groove of the plug connector on one side of the connecting plate through the pin body, and the other end of the movable pin is plugged into the second groove of the plug connector on the other side of the connecting plate through the clamping block.

[0013] The pin body is connected to the clamping block via a connecting portion, a second U-shaped groove is formed on a side surface of the second groove away from the plug connector, and the connecting portion passes through the second U-shaped groove.

[0014] A side groove is formed at one end of the corner connector, and a third connecting tongue is formed at the other end of the corner connector. The first connecting tongue of the bottom connector / the second connecting tongue of the latch connector can be matched and inserted in the side groove at one end of the corner connector, and the third connecting tongue can be matched and inserted in the first side through groove of the bottom connector / the second side through groove of the latch connector, and are locked and fixed by a movable pin.

[0015] A third groove opening upward is formed on the end of the third connecting tongue away from the corner connecting piece, one end of the movable pin is inserted in the third groove through the matching pin body, and the other end of the movable pin is inserted in the blind groove of the through groove of the bottom connecting piece / pin connecting piece through the matching clamping block; the pin body and the clamping block are connected by a connecting part, and a third U-shaped groove is formed on the side surface of the third groove away from the corner connecting piece, and the connecting part passes through the third U-shaped groove.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The utility model is provided with steel sections, bottom connectors, latch connectors and corner connectors. Adjacent steel sections are spliced ​​and fixed by the bottom connectors and latch connectors. The bottom connectors and latch connectors on both sides of the corner are spliced ​​and fixed by the corner connectors respectively. The overall support structure is constructed in a splicing manner, and can adapt to the connection requirements of different positions such as the bottom layer, the middle and upper layers, and the corners to form a multi-circle support structure, and ensure the integrity and stability of the support structure. The construction is more convenient, fast and efficient. Compared with traditional steel sheet piles, it has a stronger support effect and reduces the requirements for hoisting equipment, sites, technologies, etc., and can be applied to the construction of various foundation pits.

[0018] 2. The utility model is provided with a movable pin, a bottom connector, a latch connector and a corner connector. By plugging the groove on the connecting tongue with the positioning block on the movable pin, snapping the U-shaped groove on the connecting tongue with the connecting portion on the movable pin, and plugging the pin body on the movable pin into the through groove and the blind groove, the connection reliability between the bottom connectors, between the latch connectors, between the bottom connector and the corner connector, and between the latch connector and the corner connector is ensured to enhance the pressure resistance of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the medium-shaped steel of the deep foundation pit support structure that can be quickly assembled according to the utility model;

[0020] Figure 2 It is a stereoscopic view from one side of the bottom layer connecting piece in the deep foundation pit support structure that can be quickly assembled according to the utility model;

[0021] Figure 3 It is a stereoscopic view from another side of the bottom layer connecting member in the deep foundation pit support structure that can be quickly assembled according to the utility model;

[0022] Figure 4 It is a three-dimensional diagram of a movable pin in the deep foundation pit support structure that can be quickly assembled according to the utility model;

[0023] Figure 5 It is a three-dimensional diagram of a latch connector in a deep foundation pit support structure that can be quickly assembled according to the utility model;

[0024] Figure 6 It is a three-dimensional diagram of a corner connector in a deep foundation pit supporting structure that can be quickly assembled according to the utility model.

[0025] In the figure, 1 is steel, 11 is panel, 12 is connecting plate, 13 is mounting hole, 2 is bottom connecting piece, 21 is through groove, 22 is first side through groove, 23 is first connecting tongue, 231 is first groove, 232 is first U-shaped groove, 24 is movable pin, 241 is pin body, 242 is connecting part, 243 is blocking block, 3 is latch connecting piece, 31 is blind hole, 32 is latch, 33 is second connecting tongue, 331 is second groove, 332 is second U-shaped groove, 4 is corner connecting piece, 41 is side groove, 42 is third connecting tongue, 421 is third groove, 422 is third U-shaped groove. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Please see attached Figure 1 To Attachment Figure 6 A deep foundation pit support structure that can be quickly assembled includes a steel section 1, a bottom connection piece 2, a pin connection piece 3 and a corner connection piece 4; the steel section 1 is arranged along the depth direction of the deep foundation pit, and a plurality of steel sections 1 are arranged at intervals along the edge of the deep foundation pit; a plurality of pin connections 3 are sequentially plugged into the bottom connection piece 2 from bottom to top to form a vertical connection piece, and two adjacent steel sections 1 in the same plane are connected by the vertical connection piece; two adjacent vertical connections located on both sides of the corner are connected by the corner connection piece 4.

[0028] Preferably, the steel 1 can be made of the same construction depth as the deep foundation pit support structure. If the foundation pit is deep and the hoisting of the steel 1 is difficult, a multi-segment steel unit can be vertically spliced ​​to form the steel 1. The bottoms of two adjacent steels 1 are connected by a bottom connector 2, and the middle and upper parts of two adjacent steels 1 are connected by a latch connector 3. At the corner of the support structure, the bottom of the corner is connected to the bottom connectors 2 on both sides by a corner connector 4, and the middle and upper parts of the corner are connected to the latch connectors 3 on both sides by a corner connector 4.

[0029] The steel section 1, the bottom connector 2, the latch connector 3 and the corner connector 4 are all made of steel material, with high structural strength, strong bearing capacity and not easy to deform, so as to ensure the foundation pit supporting effect.

[0030] Please see attached Figure 1 The steel section 1 includes a panel 11 and a connecting plate 12; the connecting plate 12 is connected between the two panels 11 to form an H-shaped steel, and a plurality of mounting holes 13 are formed at intervals on the connecting plate 12; a pair of bottom connectors 2 are embedded between the two panels 11 and are arranged in close proximity to the connecting plate 12, and the pair of bottom connectors 2 are butt-jointed through the mounting holes 13; a pair of latch connectors 3 are embedded between the two panels 11 and are arranged in close proximity to the connecting plate 12, and the latch connectors 3 are butt-jointed through the mounting holes 13.

[0031] Preferably, the steel 1 can be an H-shaped steel of the prior art, and the specifications of the H-shaped steel can be adaptively selected according to the actual support requirements. The width of the connecting plate 12 of the steel 1 can be consistent with the width of the bottom connector 2 and the width of the bolt connector 3, so as to avoid a large gap between the bottom connector 2 and the bolt connector 3 after being installed between a pair of panels 11, so as to improve the stability and integrity of the entire support structure. The number and spacing of the mounting holes 13 can be adaptively adjusted according to the actual connection requirements.

[0032] Please see attached Figure 2 and attached Figure 3 A through groove 21 is formed in the bottom connecting piece 2 along the height direction, and the bottom connecting piece 2 is plugged into the pin connecting piece 3 through the through groove 21; a first side through groove 22 connected to the through groove 21 is formed on one side of the bottom connecting piece 2, and a first connecting tongue 23 is formed on the other side of the bottom connecting piece 2; the bottom connecting piece 2 on one side of the corner is plugged into one end of the corner connecting piece 4 through the first connecting tongue 23, and the other end of the corner connecting piece 4 is plugged into the first side through groove 22 of the bottom connecting piece 2 on the other side of the corner, and is locked and fixed by a movable pin 24; the first side through groove 22 of the bottom connecting piece 2 attached to one side of the connecting plate 12 can be aligned with the mounting hole 13, and the first connecting tongue 23 of the bottom connecting piece 2 attached to the other side of the connecting plate 12 can penetrate the mounting hole 13 and the first side through groove 22 of the bottom connecting piece 2 on one side of the connecting plate 12, and is locked and fixed by a movable pin 24.

[0033] The two bottom-level connectors 2 are matched and plugged together through the first side through groove 22 and the first connecting tongue 23. At the same time, the first connecting tongue 23 passes through the mounting hole 13 on the connecting plate 12, thereby connecting the two bottom-level connectors 2 on both sides of the connecting plate 12 to the steel section 1, and then connecting the bottom of each steel section 1 in turn through the bottom-level connector 2.

[0034] Preferably, the number of the first side through grooves 22 and the first connecting tongues 23 on the bottom connecting member 2 is the same and the positions correspond one to one, preferably there are two first side through grooves 22 and two first connecting tongues 23 .

[0035] Please see attached Figure 2 To Attachment Figure 4 A first groove 231 opening upward is formed on the end of the first connecting tongue 23 away from the bottom connecting piece 2, one end of the movable pin 24 is matched and inserted into the through groove 21 of the bottom connecting piece 2 on one side of the connecting plate 12 through the pin body 241, and the other end of the movable pin 24 is matched and inserted into the first groove 231 of the bottom connecting piece 2 on the other side of the connecting plate 12 through the clamping block 243.

[0036] The pin body 241 and the clamping block 243 at both ends of the movable pin 24 can form an N-shaped structure, which is used to be inserted into the through groove 21 and the first groove 231 to limit lateral displacement and prevent it from falling out, thereby ensuring the connection reliability of the two bottom connectors 2 and the connecting plate 12.

[0037] Please see attached Figure 2 To Attachment Figure 4 The pin body 241 is connected to the clamping block 243 via a connecting portion 242 . A first U-shaped groove 232 is formed on a side surface of the first groove 231 away from the bottom connector 2 . The connecting portion 242 penetrates the first U-shaped groove 232 .

[0038] By utilizing the setting of the first U-shaped groove 232, the movable pin 24 can be inserted between the two bottom-level connectors 2 and then fall down, so that the pin body 241 falls into the through groove 21 of one bottom-level connector 2, and the clamping block 243 falls into the first groove 231, preventing the two bottom-level connectors 2 and the connecting plate 12 from loosening, thereby improving the connection reliability.

[0039] Preferably, the depth of the first groove 231 is greater than the depth of the first U-shaped groove 232, and the height of the positioning block 243 is less than the depth of the first groove 231. The length of the first connecting tongue 23 in the direction perpendicular to the opening of the through groove 21 is slightly greater than the sum of the thickness of the connecting plate 12 and the length of the first side through groove 22 in the direction perpendicular to the opening of the through groove 21, so that after the first connecting tongue 23 passes through the mounting hole 13 and is inserted into the first side through groove 22 of another bottom connecting member 2, the movable pin 24 can enter the through groove 21 of the bottom connecting member 2, and fall down along the first U-shaped groove 232 under the action of gravity, so that a part of the pin body 241 is located lower than the first connecting tongue 23, so that the first connecting tongue 23 can no longer withdraw from the first side through groove 22, thereby completing the fixed connection of the two bottom connecting members 2.

[0040] Please see attached Figure 5 The plug connector 3 is formed with a blind groove 31 with a top opening along the height direction, and a plug 32 is formed at the bottom of the plug connector 3. The plug 32 can be plugged into the through groove 21 of the bottom connector 2, and the plug 32 of the upper layer of the plug connector 3 can be plugged into the blind groove 31 of the lower layer of the plug connector 3; a second side through groove (not shown in the figure) connected to the blind groove 31 is formed on one side of the plug connector 3, and a second connecting tongue 33 is formed on the other side of the plug connector 3; the plug connector 3 on the corner side The second connecting tongue 33 is plugged into one end of the corner connector 4, and the other end of the corner connector 4 is plugged into the second side through groove of the pin connector 3 on the other side of the corner, and is locked and fixed by the movable pin 24; the second side through groove of the pin connector 3 attached to one side of the connecting plate 12 can be aligned with the mounting hole 13, and the second connecting tongue 33 of the pin connector 3 attached to the other side of the connecting plate 12 can pass through the mounting hole 13 and the second side through groove of the pin connector 3 on one side of the connecting plate 12, and is locked and fixed by the movable pin 24.

[0041] The bottom connector 2 is plugged into the plug pin 32 of the plug connector 3 through the through slot 21, and two adjacent plug connectors 3 can be plugged into each other through the blind hole 31 and the plug pin 32, so the connection is convenient and quick. When plugging, the size of the plug pin 32 can be slightly smaller than the size of the through slot 21 and the blind hole 31 to avoid interference with the pin body 421.

[0042] The two latch connectors 3 are matched and plugged together through the second side through groove and the second connecting tongue 33. At the same time, the second connecting tongue 33 passes through the mounting hole 13 on the connecting plate 12, thereby connecting the two latch connectors 3 on both sides of the connecting plate 12 to the steel section 1, and then connecting the middle and upper parts of each steel section 1 in turn through the latch connector 3.

[0043] Preferably, the number of the second side through grooves and the second connecting tongues 33 on the bolt connector 3 is the same and the positions are one-to-one corresponding, preferably two second side through grooves and two second connecting tongues 33. For two adjacent sections of spliced ​​steel units, one group of second side through grooves and second connecting tongues 33 can be connected to the connecting plate 12 of the next section of the steel unit, and the other group of second side through grooves and second connecting tongues 33 can be connected to the connecting plate 12 of the previous section of the steel unit, thereby ensuring that the splicing of the two adjacent sections of the steel unit is firm and reliable.

[0044] Please see attached Figure 4 and attached Figure 5 A second groove 331 opening upward is formed on the end of the second connecting tongue 33 away from the plug connector 3, one end of the movable pin 24 is matched and inserted into the blind groove 31 of the plug connector 3 on one side of the connecting plate 12 through the pin body 241, and the other end of the movable pin 24 is matched and inserted into the second groove 331 of the plug connector 3 on the other side of the connecting plate 12 through the clamping block 243.

[0045] The pin body 241 and the clamping block 243 at both ends of the movable pin 24 can form an n-shaped structure, which is used to be inserted into the blind groove 31 and the second groove 331, limiting lateral displacement and not easy to fall out, thereby ensuring the connection reliability of the two pin connectors 3 and the connecting plate 12.

[0046] Please see attached Figure 4 and attached Figure 5 The pin body 241 is connected to the clamping block 243 via a connecting portion 242 , and a second U-shaped groove 332 is formed on a side surface of the second groove 331 away from the plug connector 3 , and the connecting portion 242 passes through the second U-shaped groove 332 .

[0047] By utilizing the setting of the second U-shaped groove 332, the movable pin 24 can be inserted between the two latch connectors 3 and then fall down, so that the pin body 241 falls into the blind groove 31 of one latch connector 3, and the clamping block 243 falls into the second groove 331, thereby preventing the two latch connectors 3 and the connecting plate 12 from loosening and improving the connection reliability.

[0048] Preferably, the depth of the second groove 331 is greater than the depth of the second U-shaped groove 332, and the height of the positioning block 243 is less than the depth of the second groove 331. The length of the second connecting tongue 33 in a direction perpendicular to the opening of the blind groove 31 is slightly greater than the sum of the thickness of the connecting plate 12 and the length of the second side through groove in a direction perpendicular to the opening of the blind groove 31.

[0049] Please see attached Figure 6A side groove 41 is formed at one end of the corner connector 4, and a third connecting tongue 42 is formed at the other end of the corner connector 4. The first connecting tongue 23 of the bottom connector 2 / the second connecting tongue 33 of the plug connector 3 can be matched and inserted in the side groove 41 at one end of the corner connector 4, and the third connecting tongue 42 can be matched and inserted in the first side through groove 21 of the bottom connector 2 / the second side through groove of the plug connector 3, and are locked and fixed by the movable pin 24.

[0050] Preferably, the height and quantity of the corner connectors 4 can match the height and quantity of the bottom connectors 2 and the latch connectors 3, so that the corner connectors 4 at the height of the bottom connectors 2 connect the bottom connectors 2 on both sides of the corner, and the corner connectors 4 at the height of the latch connectors 3 connect the latch connectors 3 on both sides of the corner.

[0051] Usually, the corner of the foundation pit support structure is a right angle, and a right-angle L-shaped corner connector 4 can be used. After the third connecting tongue 42 is locked with the first side through groove 21 of the bottom connector 2 / the second side through groove of the latch connector 3 by the movable pin 24, since the corner connector 4 is an L-shaped structure, the relative displacement of the side groove 41 at one end of the corner connector 4 and the first connecting tongue 23 of the bottom connector 2 / the second connecting tongue 33 of the latch connector 3 can be limited to prevent loosening, thereby ensuring the connection reliability of the corner connector 4 between the bottom connector 2 / the latch connector 3 on both sides of the corner, and convenient plugging and disassembly.

[0052] Please see attached Figure 4 and attached Figure 6 A third groove 421 opening upward is formed on the end of the third connecting tongue 42 away from the corner connector 4, one end of the movable pin 24 is matched and inserted in the third groove 421 through the pin body 241, and the other end of the movable pin 24 is matched and inserted in the through groove 21 of the bottom connector 2 / blind groove 31 of the pin connector 3 through the clamping block 243.

[0053] The pin body 241 and the clamping block 243 at both ends of the movable pin 24 can form an n-shaped structure, which is used to be inserted into the through groove 21 / blind groove 31 and the first groove 231 / second groove 331, limiting lateral displacement and not easy to fall out, thereby ensuring the connection reliability of the two bottom connectors 2 / pin connectors 3 and the corner connector 4.

[0054] Please see attached Figure 4 and attached Figure 6 The pin body 241 is connected to the clamping block 243 via a connecting portion 242 , a third U-shaped groove 422 is formed on a side surface of the third groove 421 away from the corner connector 4 , and the connecting portion 242 passes through the third U-shaped groove 422 .

[0055] By utilizing the setting of the third U-shaped groove 422, the movable pin 24 can be inserted between the two bottom-level connectors 2 / plug connectors 3 and then fall down, so that the pin body 241 falls into the through groove 21 of a bottom-level connector 2 / blind groove 31 of the plug connector 3, and the clamping block 243 falls into the first groove 231 / second groove 331, thereby preventing the two bottom-level connectors 2 / plug connectors 3 from loosening with the corner connector 4 and improving the connection reliability.

[0056] Preferably, the depth of the third groove 421 is greater than the depth of the third U-shaped groove 422, and the height of the positioning block 243 is less than the depth of the third groove 421. The length of the third connecting tongue 42 in the direction perpendicular to the opening of the through groove 21 / blind groove 31 is slightly greater than the sum of the thickness of the connecting plate 12 and the length of the first side through groove 22 / second side through groove in the direction perpendicular to the opening of the through groove 21 / blind groove 31.

[0057] Please see attached Figure 1 To Attachment Figure 6 , the construction method of the utility model is:

[0058] The position of the steel 1 is positioned according to the design position of the support pile, and the first steel 1 is hoisted. The first bottom connector 2 is fitted at the bottom of the left end of the connecting plate 12 of the steel 1, and the first bottom connector 2 is matched and located between the left sides of the panels 11 of the two steels 1. The second bottom connector 2 is fitted and installed at the bottom of the right end surface of the steel 1, and the second bottom connector 2 is matched and located between the right sides of the panels 11 of the two steels 1.

[0059] When installing the first and second bottom connectors 2, the first connecting tongue 23 of the first bottom connector 2 passes through the mounting hole 13 and is inserted into the first side through slot 22 of the second bottom connector 2. Place ice cubes in the first groove 231 of the first bottom connector 2, insert the positioning block 243 of the movable pin 24 into the first groove 231 and place it on the ice cubes, and raise the pin body 241 of the movable pin 24 to facilitate the pin body 241 to pass through the mounting hole 13 and the first side through slot 22 and be inserted into the through slot 21.

[0060] After the first and second bottom-level connectors 2 are plugged in and fixed, the ice gradually melts, the positioning block 243 falls into the first groove 231 due to gravity, the connecting portion 242 falls into the first U-shaped groove 232, and the pin body 241 falls synchronously and makes the bottom of the pin body 241 lower than the bottom of the first side through groove 22, thereby limiting the pin body 241 in the through groove 21, so that the first and second bottom-level connectors 2 are connected and fixed to the steel section 1.

[0061] The first latch connector 3 is inserted into the through slot 21 of the first bottom connector 2 through the latch 32 at the bottom, and the second latch connector 3 is inserted into the through slot 21 of the second bottom connector 2. The first and second latch connectors 3 are plugged and locked by the second connecting tongue 33 and the movable pin 24, and the plugging and locking method is the same as that of the first and second bottom connectors 2, which will not be repeated here.

[0062] Several plug connectors 3 are plugged in from bottom to top in sequence to form a vertical connector that is consistent with the height of the steel section 1, thereby completing the installation of the first steel section 2.

[0063] Lift the second steel section 2, and make the second bottom connecting piece 2 fit with the left side of the connecting plate 12 of the second steel section 2, install the third bottom connecting piece 2 on the right side of the connecting plate 12 of the second steel section 2, and plug and lock the second and third bottom connecting pieces 2 through the first connecting tongue 23 and the movable pin 24. The plug-in locking method is the same as that of the first and second bottom connecting pieces 2, and will not be repeated here.

[0064] The latch connector 3 is installed from bottom to top on the right side of the connecting plate 12 of the second steel section 2, and the latch connector 3 is plugged and locked with the latch connector 3 on the left side of the second steel section 2. The plug-in and locking method is the same as the plug-in and locking method of the first and second latch connectors 3, which will not be repeated here, so that the second steel section 1 is connected and fixed to the first steel section 1.

[0065] Repeat the above steps to complete the installation of the subsequent steel sections 1. At the corner of the supporting structure, after installing the bottom connector 2 and the latch connector 3 at the right end of the connecting plate 12 of the steel section 1, install the corner connector 4 to the right end of the bottom connector 2 and the latch connector 3. Specifically, on one side of the corner, insert the first connecting tongue 23 of the bottom connector 2 and the second connecting tongue 33 of the latch connector 3 into the side groove 41 at one end of the corner connector 4 at the corresponding height; on the other side of the corner, when installing the first bottom connector 2 and the latch connector 3, insert the third connecting tongue 42 at the other end of the corner connector 4 at the corresponding height into the first side through groove 22 of the bottom connector 2 and the second side through groove of the latch connector 3, and lock it with the movable pin 24. The locking method of the movable pin 24 is the same as the locking method of the movable pin 24 mentioned above, which will not be repeated here.

[0066] The construction is carried out in the above manner until all the steel sections 1 are installed so as to enclose and form a supporting structure for the deep foundation pit.

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A deep foundation pit support structure that can be quickly assembled, characterized by: The invention comprises a steel section (1), a bottom connection piece (2), a latch connection piece (3) and a corner connection piece (4); the steel section (1) is arranged along the depth direction of a deep foundation pit, and a plurality of steel sections (1) are arranged at intervals along the edge of the deep foundation pit; a plurality of latch connection pieces (3) are plugged into the bottom connection piece (2) in sequence from bottom to top to form a vertical connection piece; two adjacent steel sections (1) in the same plane are connected by the vertical connection piece; and two adjacent vertical connection pieces located on both sides of a corner are connected by the corner connection piece (4).

2. The deep foundation pit support structure capable of rapid assembly according to claim 1 is characterized in that: The steel section (1) comprises a panel (11) and a connecting plate (12); the connecting plate (12) is connected between two panels (11) to form an H-shaped steel section, and a plurality of mounting holes (13) are formed at intervals on the connecting plate (12); a pair of bottom connecting members (2) are embedded between the two panels (11) and are arranged in close contact with the connecting plate (12), and the pair of bottom connecting members (2) are butt-jointed through the mounting holes (13); a pair of latch connecting members (3) are embedded between the two panels (11) and are arranged in close contact with the connecting plate (12), and the latch connecting members (3) are butt-jointed through the mounting holes (13).

3. The deep foundation pit support structure capable of rapid assembly according to claim 2 is characterized in that: The bottom connecting member (2) is provided with a through groove (21) in the height direction, and the bottom connecting member (2) is plugged into the latch connecting member (3) through the through groove (21); a first side through groove (22) communicating with the through groove (21) is formed on one side of the bottom connecting member (2), and a first connecting tongue (23) is formed on the other side of the bottom connecting member (2); the bottom connecting member (2) on one side of the corner is plugged into one end of the corner connecting member (4) through the first connecting tongue (23), and the other end of the corner connecting member (4) is plugged into the other side of the corner The first side through groove (22) of the bottom connecting piece (2) on the side of the connecting plate (12) is inserted and locked and fixed by a movable pin (24); the first side through groove (22) of the bottom connecting piece (2) affixed to one side of the connecting plate (12) can be aligned with the mounting hole (13), and the first connecting tongue (23) of the bottom connecting piece (2) affixed to the other side of the connecting plate (12) can pass through the mounting hole (13) and the first side through groove (22) of the bottom connecting piece (2) on one side of the connecting plate (12), and is locked and fixed by a movable pin (24).

4. The deep foundation pit support structure capable of rapid assembly according to claim 3 is characterized in that: A first groove (231) opening upward is formed on one end of the first connecting tongue (23) away from the bottom connecting piece (2); one end of the movable pin (24) is matched and inserted into the through groove (21) of the bottom connecting piece (2) on one side of the connecting plate (12) through a pin body (241); and the other end of the movable pin (24) is matched and inserted into the first groove (231) of the bottom connecting piece (2) on the other side of the connecting plate (12) through a clamping block (243).

5. The deep foundation pit support structure capable of rapid assembly according to claim 4 is characterized in that: The pin body (241) is connected to the clamping block (243) via a connecting portion (242); a first U-shaped groove (232) is formed on a side surface of the first groove (231) away from the bottom connecting member (2); and the connecting portion (242) passes through the first U-shaped groove (232).

6. The deep foundation pit support structure capable of rapid assembly according to claim 2 is characterized in that: The latch connector (3) is provided with a blind groove (31) with a top opening along the height direction, and a latch (32) is formed at the bottom of the latch connector (3). The latch (32) can be plugged into the through groove (21) of the bottom connector (2), and the latch (32) of the latch connector (3) of the upper layer can be plugged into the blind groove (31) of the latch connector (3) of the lower layer; a second side through groove connected to the blind groove (31) is formed on one side of the latch connector (3), and a second connecting tongue (33) is formed on the other side of the latch connector (3); the latch connector (3) on one side of the corner is connected to the blind groove (31) by the second through groove (31) of ... The second connecting tongue (33) is plugged into one end of the corner connecting piece (4), and the other end of the corner connecting piece (4) is plugged into the second side through slot of the plug connecting piece (3) on the other side of the corner, and is locked and fixed by a movable pin (24); the second side through slot of the plug connecting piece (3) attached to one side of the connecting plate (12) can be aligned with the mounting hole (13), and the second connecting tongue (33) of the plug connecting piece (3) attached to the other side of the connecting plate (12) can pass through the mounting hole (13) and the second side through slot of the plug connecting piece (3) on one side of the connecting plate (12), and is locked and fixed by a movable pin (24).

7. The deep foundation pit support structure capable of rapid assembly according to claim 6 is characterized in that: A second groove (331) opening upward is formed on one end of the second connecting tongue (33) away from the plug connector (3); one end of the movable pin (24) is plugged into the blind groove (31) of the plug connector (3) on one side of the connecting plate (12) through the pin body (241); and the other end of the movable pin (24) is plugged into the second groove (331) of the plug connector (3) on the other side of the connecting plate (12) through the clamping block (243).

8. The deep foundation pit support structure capable of rapid assembly according to claim 7 is characterized in that: The pin body (241) is connected to the clamping block (243) via a connecting portion (242); a second U-shaped groove (332) is formed on a side surface of the second groove (331) away from the latch connector (3); and the connecting portion (242) passes through the second U-shaped groove (332).

9. The deep foundation pit support structure capable of rapid assembly according to claim 6 is characterized in that: A side groove (41) is formed at one end of the corner connector (4), and a third connecting tongue (42) is formed at the other end of the corner connector (4); the first connecting tongue (23) of the bottom connector (2) / the second connecting tongue (33) of the latch connector (3) can be matched and inserted into the side groove (41) at one end of the corner connector (4); the third connecting tongue (42) can be matched and inserted into the first side through groove (22) of the bottom connector (2) / the second side through groove of the latch connector (3), and locked and fixed by a movable pin (24).

10. The deep foundation pit support structure capable of rapid assembly according to claim 9 is characterized in that: A third groove (421) opening upward is formed on one end of the third connecting tongue (42) away from the corner connecting piece (4); one end of the movable pin (24) is plugged into the third groove (421) through the pin body (241); the other end of the movable pin (24) is plugged into the through groove (21) of the bottom connecting piece (2) / the blind groove (31) of the plug connecting piece (3) through the clamping block (243); the pin body (241) and the clamping block (243) are connected through a connecting portion (242); a third U-shaped groove (422) is formed on one side of the third groove (421) away from the corner connecting piece (4); and the connecting portion (242) passes through the third U-shaped groove (422).

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