Anti-collapse steel frame for building foundation pit construction

Abstract

The utility model discloses a building foundation pit construction anti-collapse steel frame which comprises steel columns, cross beams, telescopic beams and hydraulic oil cylinders, the multiple steel columns are symmetrically arranged in pairs to form main body stand columns of the steel frame, and the bottom ends of the steel columns are rotationally connected with walking wheels; the cross beams are parallel to the X direction of the steel frame, and the side walls of the cross beams are bolted with the side walls of the X-direction steel columns of the corresponding steel frame; the telescopic beams are parallel to the Y direction of the steel frame, and the two ends of each telescopic beam are connected with the side walls of the two adjacent steel columns in the Y direction of the corresponding steel frame in a bolted mode. The fixed end and the telescopic end of the hydraulic oil cylinder are fixed to the side walls of the two adjacent steel columns in the Y direction of the corresponding steel frame correspondingly so that the steel frame can stretch out and draw back in the Y direction. The length of the steel frame in the Y direction can be changed through stretching out and drawing back of the piston rod of the hydraulic oil cylinder, the length of the cross beam is determined according to the width of the foundation pit in the X direction of the steel frame, the foundation pit is supported in the mode that the steel frame is fixed in the X direction and stretches out and draws back in the Y direction, and the problem that major safety accidents are caused by collapse of the foundation pit under the non-slope condition is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering infrastructure construction, and more particularly to an anti-collapse steel frame for building foundation pit construction. Background Art

[0002] After the foundation pit excavation is completed, related operations such as sand filling and compaction, pipe laying, and welding are required. The foundation pit excavation usually adopts the slope excavation method to ensure the stability of the foundation pit side wall.

[0003] However, in some sites with smaller construction areas, the foundation pit does not have the conditions for slope excavation, so vertical excavation is required. However, this method is prone to foundation pit collapse when the soil on the side walls of the foundation pit is soft, resulting in major safety and quality accidents such as deep burial of the foundation pit operation.

[0004] Therefore, how to provide a collapse-proof steel frame for building foundation pit construction that can effectively prevent foundation pit collapse when the foundation pit does not have the conditions for slope excavation and protect the personal safety of foundation pit construction workers is an urgent problem to be solved in this field. Utility Model Content

[0005] In view of this, the utility model provides an anti-collapse steel frame for building foundation pit construction, aiming to solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A collapse-proof steel frame for building foundation pit construction, comprising:

[0008] There are multiple steel columns, which are symmetrically arranged in pairs to form the main columns of the steel frame, and the bottom ends of the multiple steel columns are rotatably connected to the running wheels;

[0009] There are multiple crossbeams and they are arranged parallel to the X direction of the steel frame. The side walls of the multiple crossbeams are bolted to the side walls of the multiple steel columns in the X direction of the corresponding steel frame.

[0010] There are multiple telescopic beams and they are arranged parallel to the Y direction of the steel frame. The two ends of the multiple telescopic beams are bolted to the side walls of two adjacent steel columns in the Y direction of the corresponding steel frame.

[0011] The hydraulic cylinder has a fixed end and a telescopic end which are respectively fixed to the side walls of two adjacent steel columns in the Y direction of the corresponding steel frame to achieve the telescopic movement of the steel frame in the Y direction.

[0012] The beneficial effect of the above technical solution is that the X-direction of the main columns of the steel frame are connected by a crossbeam, and the Y-direction is connected by a telescopic beam. The hydraulic cylinder is arranged in the Y-direction of the steel frame. Through the extension and retraction of the hydraulic cylinder piston rod, the telescopic beam in the Y-direction can be synchronously extended and retracted, thereby realizing the change of the Y-direction length of the steel frame. The length of the crossbeam in the X-direction of the steel frame is determined according to the width of the foundation pit, and the foundation pit is supported by fixing the steel frame in the X-direction and retracting it in the Y-direction.

[0013] Preferably, bamboo plywood is fixed to the side walls and top surface of the steel frame to resist the lateral soil pressure of the foundation pit, ensuring the overall stability of the steel frame. At the same time, the bamboo plywood can act as a windbreak during welding operations in the foundation pit, ensuring smooth welding operations.

[0014] Preferably, the structure further comprises diagonal braces, wherein the number of diagonal braces is multiple and corresponds one to one with the multiple steel columns. A lifting lug is fixed to the top of each of the multiple steel columns. One end of the diagonal brace is bolted to the lifting lug, and the other ends of the two diagonal braces corresponding to the tops of two adjacent steel columns are bolted to the same. The lifting lug enables the lifting and transportation of the steel frame. When the steel frame is fully extended in the Y direction to meet the use requirements of the foundation pit, the diagonal brace is installed on the top of the steel column. The diagonal brace and the telescopic beam form a triangular stable structure to prevent the Y-direction displacement of the steel frame caused by oil leakage from the hydraulic cylinder, ensure that the steel bars will not move during the foundation pit operation, and utilize the diagonal brace to ensure the stability of the steel frame during use.

[0015] Preferably, a transition beam is fixed to the side wall of the column foot of the steel column, and the bottom end of the transition beam is rotatably connected to the running wheel. The running wheel is installed through the transition beam to ensure the running effect of the running wheel in the foundation pit.

[0016] Preferably, the number of the steel columns is six, with three of the steel columns arranged in the X direction of the steel frame and two of the steel columns arranged in the Y direction of the steel frame. The steel columns are arranged in two rows in the X direction of the steel frame and in three rows in the Y direction.

[0017] Preferably, two crossbeams are provided, placed between the opposing side walls of two steel columns in the Y direction of the steel frame, and the side walls of the two crossbeams are bolted to the middle portions of the side walls of the three corresponding steel columns in the X direction of the steel frame. The two rows of steel columns in the X direction of the steel frame are connected by two crossbeams to prevent the steel frame from collapsing.

[0018] Preferably, two telescopic beams are arranged vertically along the steel frame Y. The telescopic beams include a first telescopic beam and a second telescopic beam. The second telescopic beam is slidably connected to the first telescopic beam. The ends of the first and second telescopic beams are respectively fixed to the opposite side walls of the two steel columns of the steel frame Y. The three rows of steel columns of the steel frame Y are connected by three groups of telescopic beams, each group having two telescopic beams arranged in a corresponding vertical arrangement. The telescopic beams can slide relative to each other to achieve telescopic movement of the steel frame in the Y direction.

[0019] Preferably, multiple support beams are fixed between the two first telescopic beams and the two second telescopic beams arranged vertically in the steel frame Y. The fixed end of the hydraulic cylinder is fixed to the side wall of the steel column corresponding to the first telescopic beam, and its cylinder body is fixed to the support beam corresponding to the first telescopic beam. The piston rod of the hydraulic cylinder is fixed to the support beam corresponding to the second telescopic beam. The fixed end of the hydraulic cylinder is fixed to the steel column, and the horizontal freedom of the hydraulic cylinder body is ensured by the support beam corresponding to the first telescopic beam. The piston rod is fixed to the support beam corresponding to the second telescopic beam. During the extension and retraction operation, the piston rod pushes or pulls the support beam corresponding to the second telescopic beam, thereby enabling the second telescopic beam to slide along the first telescopic beam, thereby achieving the extension and retraction operation of the steel frame in the Y direction.

[0020] Preferably, a scissor brace is detachably connected between the two opposite side walls of two adjacent steel columns corresponding to the X direction of the steel frame to ensure the stability of the steel frame.

[0021] Preferably, the ends of the scissor braces are provided with bolt holes, and the side walls of the steel columns are provided with multiple anchor holes corresponding to the bolt holes along their height. The scissor braces are bolted to the steel columns via the bolt holes and the anchor holes. Bolting the scissor braces to the anchor holes at different locations on the steel columns allows the steel frame's X-axis length to be adjusted, allowing the steel frame to adapt to the length of the foundation pit in the X-axis. The steel frame can also adapt to the length of the foundation pit in the Y-axis by sliding in the Y-axis, ensuring that the steel frame and bamboo plywood can effectively support the side walls of the foundation pit.

[0022] It can be seen from the above technical solution that compared with the existing technology, the utility model discloses a kind of anti-collapse steel frame for construction of building foundation pit. The steel frame is retractable in the Y direction, which can reduce the storage space and facilitate transportation. The bolt connection method is detachable, which is convenient for maintenance and replacement of parts. The use of this steel frame avoids the problem of major safety accidents caused by collapse of foundation pit under no slope conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order 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 use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0024] Figure 1 This is an X-direction front view of the steel frame provided by the present invention;

[0025] Figure 2 A Y-direction front view of the steel bar provided by the present invention;

[0026] Figure 3 This is a schematic diagram of the steel column structure provided by the utility model.

[0027] in,

[0028] 1-steel column; 11-lifting ear; 12-transition beam; 2-cross beam; 3-telescopic beam; 31-first telescopic beam; 32-second telescopic beam; 4-hydraulic cylinder; 5-support beam; 6-traveling wheel; 7-scissor brace; 8-diagonal brace. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0030] See attached Figures 1 to 3 The present invention discloses an anti-collapse steel frame for foundation pit construction, comprising:

[0031] Steel columns 1, the number of steel columns 1 is multiple and they are symmetrically arranged in pairs to form the main columns of the steel frame, and the bottom ends of the multiple steel columns 1 are rotatably connected to the walking wheels 6;

[0032] There are multiple crossbeams 2 and they are arranged parallel to the steel frame in the X direction. The side walls of the multiple crossbeams 2 are bolted to the side walls of the multiple steel columns 1 in the corresponding X direction of the steel frame.

[0033] There are multiple telescopic beams 3 and they are arranged parallel to the steel frame in the Y direction. Both ends of the multiple telescopic beams 3 are bolted to the side walls of two adjacent steel columns 1 in the Y direction of the corresponding steel frame.

[0034] The hydraulic cylinder 4 has a fixed end and a telescopic end which are respectively fixed to the side walls of two adjacent steel columns 1 in the Y direction of the corresponding steel frame to achieve telescopic movement of the steel frame in the Y direction.

[0035] In this embodiment, if Figure 1 and 2 As shown, there are six steel columns 1 , three steel columns 1 are provided in the X direction of the steel frame, and two steel columns 1 are provided in the Y direction of the steel frame.

[0036] The steel columns are made of 100# channel steel. There are three steel columns in the X direction according to the length of the foundation pit in the X direction, and two in the Y direction, forming a 2*3 main column structure. The steel columns in the X direction are connected by cross beams, and the steel columns in the Y direction are connected by telescopic beams. The adjustment of the Y-direction length of the steel frame is achieved by a hydraulic cylinder.

[0037] In order to further optimize the above technical solution, two cross beams 2 are provided, and the two cross beams 2 are placed between the opposite side walls of the two steel columns 1 in the Y direction of the steel frame. The side walls of the two cross beams 2 are bolted to the middle of the side walls of the three steel columns 1 in the X direction of the corresponding steel frame.

[0038] The crossbeam is made of 80# channel steel. There are two crossbeams. The two crossbeams are bolted to the three steel columns in each row of the steel frame in the X direction. The crossbeams are set between the two opposite side walls of the two steel columns in the Y direction.

[0039] In order to further optimize the above technical solution, two telescopic beams 3 are arranged upward and downward along the steel frame Y. The telescopic beam 3 includes a first telescopic beam 31 and a second telescopic beam 32. The beam body of the second telescopic beam 32 is slidably connected to the beam body of the first telescopic beam 31. The ends of the first telescopic beam 31 and the second telescopic beam 32 are respectively fixed to the two opposite side walls of the two steel columns 1 in the Y direction of the steel frame.

[0040] like Figure 2 As shown, two upper and lower telescopic beams are provided on each row of steel columns in the Y direction of the steel frame, with a total of six telescopic beams in three rows. The second telescopic beam is slidably connected to the inner cavity of the first telescopic beam.

[0041] In order to further optimize the above technical solution, the first telescopic beam can be made of 100# channel steel, and the second telescopic beam can be made of 80# channel steel. The channel steel of the second telescopic beam is placed in the notch of the channel steel of the first telescopic beam. Multiple steel plates are welded on the side walls of the notch of the first telescopic beam to prevent the channel steel of the second telescopic beam from falling off. The sliding of the second telescopic beam in the first telescopic beam is achieved by using two different types of channel steels.

[0042] In other specific embodiments, the first telescopic beam can also be made of 100# round tube, and the second telescopic beam can be made of 80# round tube. The round tube of the second telescopic beam is placed in the inner cavity of the round tube of the first telescopic beam. The two round tubes with different inner diameters enable the second telescopic beam to slide along the first telescopic beam. When the first and second telescopic beams are made of round tubes, the second telescopic beam is inserted into the inner cavity of the first telescopic beam. Short channel steels are welded to one end of each of the first and second telescopic beams. The two short channel steels are bolted to the channel steels of the two steel columns in the Y direction of the steel frame to secure the first and second telescopic beams.

[0043] In order to further optimize the above technical solution, multiple support beams 5 are fixed between the two first telescopic beams 31 and the two second telescopic beams 32 arranged upward and downward on the steel frame Y, the fixed end of the hydraulic cylinder 4 is fixed to the side wall of the steel column 1 corresponding to the first telescopic beam 31 and its cylinder body is fixed to the support beam 5 corresponding to the first telescopic beam 31, and the piston rod of the hydraulic cylinder 4 is fixed to the support beam 5 corresponding to the second telescopic beam 32.

[0044] The fixed end of the hydraulic cylinder is fixed to one of the steel columns in the Y direction of the steel frame, and the cylinder body is fixed to the support beam between the two first telescopic beams arranged above and below. The support beam corresponding to the first telescopic beam is used to maintain the horizontal freedom of the hydraulic cylinder body; the piston rod of the hydraulic cylinder is fixed to the support beam corresponding to the second telescopic beam. When the hydraulic cylinder is working, the extension of the piston rod will push the support beam corresponding to the second telescopic beam to slide and then drive the second telescopic beam to slide along the first telescopic beam. Under the action of the hydraulic cylinder, the length of the steel frame in the Y direction can be extended to match the length of the foundation pit in the Y direction. When the foundation pit construction is completed, the piston rod retracts to restore the steel frame to its original position in the Y direction.

[0045] In this embodiment, it also includes diagonal braces 8. There are multiple diagonal braces 8 and they correspond one-to-one to the multiple steel columns 1. The tops of the multiple steel columns 1 are fixed with lifting ears 11. One end of the diagonal brace 8 is bolted to the lifting ear 11, and the other ends of the two diagonal braces 8 at the tops of the two adjacent steel columns 1 are bolted.

[0046] The steel frame can be hoisted and transported using the lifting lugs; when the steel frame is extended in the Y direction, in order to prevent the hydraulic cylinder from causing the piston rod to retract due to oil leakage, a diagonal brace is installed on the top of the steel frame, one end of the diagonal brace is bolted to the lifting lug, and the two diagonal braces on the top of the two steel columns in the Y direction are bolted at one end away from the lifting lug. A triangular support system is formed between the two diagonal braces and the telescopic beam, which can ensure the stability of the steel frame during use in the foundation pit.

[0047] In order to further optimize the above technical solution and further improve the stability of the steel frame, a scissor brace 7 is detachably connected between the two opposite side walls of two adjacent steel columns 1 in the X direction of the steel frame.

[0048] In order to further optimize the above technical solution and facilitate the adjustment of the X-direction length of the steel frame, a bolt hole is opened at the end of the scissors strut 7, and a plurality of anchor holes corresponding to the bolt holes are opened on the side wall of the steel column 1 along its height direction. The scissors strut 7 is bolted to the steel column 1 through the bolt holes and the anchor holes.

[0049] The scissors brace is made of 80# channel steel. The two rods corresponding to the scissors brace are abutted. By adjusting the position of different anchor holes of the scissors brace on the steel column, the distance between two adjacent steel columns in the X direction of the steel frame can be adjusted, and then the length of the steel frame in the X direction can be adjusted to realize semi-automatic control of the steel frame.

[0050] To further optimize the above technical solution and ensure smooth and orderly welding operations within the foundation pit, bamboo plywood is fixed to the side walls and top of the steel frame. This provides wind protection, ensuring smooth welding operations and facilitating radiographic inspection of weld quality. Furthermore, the bamboo plywood acts as a side shield for the steel frame, resisting lateral soil pressure in the foundation pit, preventing collapse and improving the safety of workers within the pit.

[0051] In order to further optimize the above technical solution and realize the walking of the steel frame, a transition beam 12 is fixed to the side wall of the column foot of the steel column 1, and the bottom end of the transition beam 12 is rotatably connected to the walking wheel 6.

[0052] When the hydraulic cylinder works to extend the telescopic beam, the steel frame will move and unfold in the foundation pit through the walking wheels.

[0053] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0054] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel frame for preventing collapse of building foundation pit, characterized in that: include: Steel columns (1), the number of the steel columns (1) is multiple and they are symmetrically arranged in pairs to form the main columns of the steel frame, and the bottom ends of the multiple steel columns (1) are rotatably connected to walking wheels (6); A crossbeam (2), wherein the crossbeams (2) are in plurality and arranged parallel to the X-direction of the steel frame, and the side walls of the plurality of crossbeams (2) are bolted to the side walls of the plurality of steel columns (1) corresponding to the X-direction of the steel frame; Telescopic beams (3), the number of the telescopic beams (3) is multiple and they are arranged parallel to the Y direction of the steel frame, and the two ends of the multiple telescopic beams (3) are respectively bolted to the side walls of two adjacent steel columns (1) corresponding to the Y direction of the steel frame; A hydraulic cylinder (4), wherein the fixed end and the telescopic end of the hydraulic cylinder (4) are respectively fixed to the side walls of two adjacent steel columns (1) corresponding to the Y direction of the steel frame to achieve telescopic movement of the steel frame in the Y direction.

2. The anti-collapse steel frame for construction of a building foundation pit according to claim 1, characterized in that: It also includes diagonal braces (8), the number of the diagonal braces (8) is multiple and corresponds one to one with the multiple steel columns (1), the top ends of the multiple steel columns (1) are fixed with lifting ears (11), one end of the diagonal brace (8) is bolted to the lifting ear (11), and the other ends of the two diagonal braces (8) at the top ends of two adjacent steel columns (1) are bolted.

3. The anti-collapse steel frame for construction of a building foundation pit according to claim 1, characterized in that: A transition beam (12) is fixed to the side wall of the column foot of the steel column (1), and the bottom end of the transition beam (12) is rotatably connected to the walking wheel (6).

4. The anti-collapse steel frame for construction of a building foundation pit according to claim 1, characterized in that: The number of the steel columns (1) is six, three of the steel columns (1) are provided in the X direction of the steel frame, and two of the steel columns (1) are provided in the Y direction of the steel frame.

5. The anti-collapse steel frame for construction of a building foundation pit according to claim 4, characterized in that: Two cross beams (2) are provided, and the two cross beams (2) are placed between the two opposite side walls of the two steel columns (1) in the Y direction of the steel frame, and the side walls of the two cross beams (2) are bolted to the middle parts of the side walls of the three steel columns (1) corresponding to the X direction of the steel frame.

6. The anti-collapse steel frame for construction of a building foundation pit according to claim 5, characterized in that: Two telescopic beams (3) are arranged vertically along the steel frame Y. The telescopic beams (3) include a first telescopic beam (31) and a second telescopic beam (32). The beam body of the second telescopic beam (32) is slidably connected to the beam body of the first telescopic beam (31). The ends of the first telescopic beam (31) and the second telescopic beam (32) are respectively fixed to the two opposite side walls of the two steel columns (1) in the Y direction of the steel frame.

7. The anti-collapse steel frame for construction of a building foundation pit according to claim 6, characterized in that: A plurality of support beams (5) are fixed between the two first telescopic beams (31) and the two second telescopic beams (32) arranged vertically on the steel frame Y; the fixed end of the hydraulic cylinder (4) is fixed to the side wall of the steel column (1) corresponding to the first telescopic beam (31), and the cylinder body thereof is fixed to the support beam (5) corresponding to the first telescopic beam (31); and the piston rod of the hydraulic cylinder (4) is fixed to the support beam (5) corresponding to the second telescopic beam (32).

8. The anti-collapse steel frame for construction of a building foundation pit according to claim 1, characterized in that: A scissor brace (7) is detachably connected between the two opposite side walls of two adjacent steel columns (1) corresponding to the X direction of the steel frame.

9. The anti-collapse steel frame for construction of a building foundation pit according to claim 8, characterized in that: Bolt holes are provided at the ends of the scissors struts (7), and a plurality of anchor holes corresponding to the bolt holes are provided on the side walls of the steel column (1) along the height direction thereof. The scissors struts (7) are bolted to the steel column (1) through the bolt holes and the anchor holes.

10. The anti-collapse steel frame for construction of a building foundation pit according to claim 1, characterized in that: Bamboo plywood is fixed to the side walls and top surface of the steel frame.

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