A socket-and-spigot type circular ladder cage for deep foundation pit construction

Abstract

The present invention discloses a socket-type circular ladder cage for deep foundation pit construction, comprising: a main load-bearing rod, which is vertically installed in the foundation pit in a manner that the height can be adjusted; a plurality of secondary load-bearing rods, each of which is vertically installed in the foundation pit in a manner that the height can be adjusted, all of which are evenly distributed along the same circumference, and the circumference where all of the secondary load-bearing rods are located is coaxially distributed with the main load-bearing rod, and all of the secondary load-bearing rods are connected into one by a fixing ring; and a staircase, which is detachably installed between the main load-bearing rod and the secondary load-bearing rod, and the staircase is spirally distributed from bottom to top. The ladder cage using the present invention is a cylindrical structure as a whole, occupies a small area, has good overall structural stability, and can be completely disassembled, so as to facilitate the reuse of the ladder cage, thereby improving the utilization rate of the ladder cage.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a socket-and-spigot type circular ladder cage for deep foundation pit construction. Background Art

[0002] In deep foundation pit engineering sites, workers need to go up and down the foundation pit frequently, so ladder cages are necessary equipment for workers. At present, the ladder cages used in deep foundation pit engineering sites in my country are all box-type ladder cages that are welded with horizontal square steel and connected with vertical square steel bolts. However, this type of ladder cage currently has the following shortcomings: First, the welding and installation time is long, and the quality cannot be guaranteed. The bolt connection part is prone to loose connection or lack of bolts, which can easily lead to insufficient overall stability of the entire ladder cage, and thus structural deformation due to external force collision, causing safety accidents; second, after the construction is completed, the removal of the ladder cage is difficult and time-consuming, and the ladder cage after removal is difficult to reuse, and the reuse rate is low; moreover, the existing ladder cage occupies a large area, is complicated to install, and cannot be completely disassembled, resulting in inconvenience in transportation.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a socket-and-spigot type circular ladder cage for deep foundation pit construction, thereby overcoming the shortcomings of existing ladder cages, such as large floor space occupation, low reuse rate and poor overall structural stability.

[0005] To achieve the above-mentioned purpose, the present invention provides a socket-type circular ladder cage for deep foundation pit construction, comprising: a main load-bearing rod, which is vertically installed in the foundation pit in a manner that its height can be adjusted; a plurality of secondary load-bearing rods, each of which is vertically installed in the foundation pit in a manner that its height can be adjusted, all of which are evenly distributed along the same circumference, and the circumferences where all of the secondary load-bearing rods are located are coaxially distributed with the main load-bearing rods, and all of which are connected into one by fixing rings; and stairs, which are detachably installed between the main load-bearing rods and the secondary load-bearing rods, and are spirally distributed from bottom to top.

[0006] Preferably, in the above technical solution, the staircase includes a plurality of step plates, each of the step plates is distributed in a fan shape, and each of the step plates is connected to the main load-bearing rod and the corresponding two secondary load-bearing rods in a detachable manner through a step connector.

[0007] Preferably, in the above technical solution, the step connecting member includes two cross bar bolts, and each of the step plates is provided with connecting through holes at both ends thereof, and a cross bar bolt is movably sleeved in each of the connecting through holes, and the main load-bearing rod is provided with a first through hole at a position corresponding to the cross bar bolt of each step plate, and each of the secondary load-bearing rod is provided with a second through hole at a position corresponding to the cross bar bolt of each step plate, and each of the cross bar bolts passes through the corresponding first through hole and the corresponding second through hole and is fastened and connected by a nut.

[0008] Preferably, in the above technical solution, a step connecting plate is arranged between the two step plates, and one end of the step connecting plate connected to the step plate is provided with the connecting through hole sleeved on the cross bar bolt.

[0009] Preferably, in the above technical solution, the main load-bearing rod includes a first rod body and a first base, the lower end of the first base is installed on the bottom surface of the foundation pit, and the upper end is connected to the lower end of the first rod body in a height-adjustable manner; the first rod body includes a plurality of first load-bearing rod units, and the plurality of first load-bearing rod units are connected end to end in sequence in a detachable manner.

[0010] Preferably, in the above technical solution, the secondary load-bearing rod includes a second rod body and a second base, the lower end of the second base is installed on the bottom surface of the foundation pit, and the upper end is connected to the lower end of the second rod body in a height-adjustable manner; the second rod body includes a plurality of second load-bearing rod units, and the plurality of second load-bearing rod units are connected end to end in sequence in a detachable manner.

[0011] Preferably, in the above technical solution, a first connecting sleeve is provided at the upper end of the first base, a second connecting sleeve that can be sleeved in the first connecting sleeve is provided at the lower end of the first rod body, and the diameter of the second connecting sleeve is smaller than the diameter of the first rod body, and a height adjustment device is provided between the first connecting sleeve and the first rod body; a plurality of third through holes are provided at intervals from bottom to top on the first connecting sleeve, and a plurality of fourth through holes corresponding to the third through holes are provided at intervals from bottom to top on the second connecting sleeve, and the corresponding third through holes and the fourth through holes are selectively connected through the height adjustment device, and are connected through a fixing pin;

[0012] Wherein, the connection structure between the second base and the second rod body is the same as the connection structure between the first base and the first rod body.

[0013] Preferably, in the above technical solution, the fixed latch comprises: a pin shaft, a front end of which is provided with a cavity; two locking blocks, each of which is in the shape of a "7", the two locking blocks are relatively distributed left and right and are installed in the cavity in a manner that can be flipped forward and backward, and an elastic mechanism is arranged between each locking block and the pin shaft; when the locking block is not subjected to external force, the elastic mechanism causes the locking block to flip forward and open; when the locking block is subjected to external force greater than the force of the elastic mechanism, the locking block can overcome the force of the elastic mechanism and flip backward and be stored in the cavity; and an elastic ring buckle, the elastic ring buckle comprises two semicircular arc-shaped fasteners, the rear ends of the two fasteners are connected to the rear end of the pin shaft, and the two fasteners are distributed in a manner that the semicircular arc-shaped concave surfaces are relatively distributed left and right, and the front ends of the two fasteners are provided with locking holes corresponding to the locking blocks.

[0014] Preferably, in the above technical solution, the height adjustment device includes at least one height adjustment ring movably mounted on the first connecting sleeve.

[0015] Preferably, in the above technical solution, a metal mesh is provided on the upper part of all the secondary load-bearing rods.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The ladder cage of the present invention is an overall cylindrical structure with a small footprint, and can be used in narrow and deep foundation pits. The main frame of the ladder cage includes a main load-bearing rod, a plurality of secondary load-bearing rods and stairs. The secondary load-bearing rods are installed around the main load-bearing rods, and the stairs are installed between the main load-bearing rods and the plurality of secondary load-bearing rods in a detachable manner to improve the stability of the overall structure of the ladder cage, and to facilitate the disassembly and assembly of the ladder cage, so as to facilitate the reuse of the ladder cage, thereby improving the utilization rate of the ladder cage.

[0018] 2. The staircase of the present invention comprises a plurality of step plates, each of which is connected to the main load-bearing rod and the secondary load-bearing rod by means of cross bar bolts, so as to facilitate the disassembly, assembly and transportation of the staircase, and further improve the utilization rate of the ladder cage.

[0019] 3. The first base of the main load-bearing rod and the second base of each secondary load-bearing rod of the present invention can adjust the height to adapt to the uneven bottom surface of the deep foundation pit, and the adaptability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a socket-and-spigot type circular ladder cage for deep foundation pit construction according to the present invention.

[0021] Figure 2 It is a schematic diagram of the connection structure between the staircase and the main load-bearing rods and the secondary load-bearing rods according to the present invention.

[0022] Figure 3 It is a schematic structural diagram of the main load-bearing rod according to the present invention.

[0023] Figure 4 It is a schematic diagram of the connection structure between the first base and the first rod body according to the present invention.

[0024] Figure 5 2 is a schematic diagram of the structure of the fixing bolt according to the present invention.

[0025] Figure 6 Schematic diagram of the structure of the height adjustment ring according to the present invention.

[0026] Description of main reference numerals:

[0027] 1-step plate, 2-fixing ring, 3-step connecting plate, 4-second base, 5-first base, 6-second rod body, 7-first rod body, 8-metal mesh, 9-first through hole, 10-cross bar bolt, 11-first load-bearing rod unit, 12-third connecting sleeve, 13-fourth connecting sleeve, 14-second connecting sleeve, 15-fourth through hole, 16-third through hole, 17-first connecting sleeve, 18-cavity, 19-locking block, 20-locking hole, 21-fastener, 22-pin shaft, 23-height adjustment ring. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0029] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0030] Figures 1 to 6 The schematic diagram of the structure of a socket-type circular ladder cage for deep foundation pit construction according to a preferred embodiment of the present invention is shown, and the ladder cage includes a main load-bearing rod, a plurality of secondary load-bearing rods and stairs. Figures 1 to 6The main load-bearing rod is vertically installed in the foundation pit in a manner that the height can be adjusted; each secondary load-bearing rod is vertically installed in the foundation pit in a manner that the height can be adjusted, all the secondary load-bearing rods are evenly distributed along the same circumference, and the circumference where all the secondary load-bearing rods are located is coaxially distributed with the main load-bearing rods, and all the secondary load-bearing rods are connected into one by a fixing ring 2 to improve the installation stability of the secondary load-bearing rods; the stairs are detachably installed between the main load-bearing rods and the secondary load-bearing rods to facilitate the disassembly and assembly of the stairs, and the stairs are spirally distributed from bottom to top. The load-bearing rods and secondary load-bearing rods of the present invention can both be adjusted in height to be suitable for foundation pits of different depths; the ladder cage is an overall cylindrical structure with a small footprint, and can be suitable for narrow and deep foundation pits, and the main frame of the ladder cage includes a main load-bearing rod, a plurality of secondary load-bearing rods and stairs, the secondary load-bearing rods are installed around the main load-bearing rods, and the stairs are detachably installed between the main load-bearing rods and the plurality of secondary load-bearing rods to improve the stability of the overall structure of the ladder cage, and to facilitate the disassembly and assembly of the ladder cage, so as to facilitate the reuse of the ladder cage, thereby improving the utilization rate of the ladder cage.

[0031] refer to Figure 1 and Figure 2 Preferably, the staircase includes a plurality of step plates 1, each of which is distributed in a fan shape, and each of which is connected to the main load-bearing rod and the corresponding two secondary load-bearing rods in a detachable manner through a step connector, so as to facilitate the disassembly and transportation of the staircase, and further improve the utilization rate of the ladder cage. Further preferably, the step connector includes two crossbar bolts 10, each of which is provided with external threads at both ends, and each of the front and rear ends of each step plate 1 is provided with connecting through holes, and a crossbar bolt 10 is movably sleeved in each connecting through hole, and the main load-bearing rod is provided with a first through hole 9 at a position corresponding to the crossbar bolt 10 of each step plate 1, and each secondary load-bearing rod is provided with a second through hole at a position corresponding to the crossbar bolt 10 of each step plate 1, and each crossbar bolt 10 passes through the corresponding first through hole 9 and the corresponding second through hole and is fastened and connected by a nut to fix the step plate 1 between the main load-bearing rod and the secondary load-bearing rod. In order to improve the stability of the connection of the step plates 1, a step connecting plate 3 is arranged between the two step plates 1, and one end of the step connecting plate 3 connected to the step plates 1 is provided with a connecting through hole sleeved on the cross bar bolt 10. When installing the step plates 1 and the step connecting plate 3, first place the step plates 1 and the step connecting plate 3 between the main load-bearing rod and the secondary load-bearing rod, so that the small end of the fan-shaped step plate 1 corresponds to the main load-bearing rod, and the connecting through hole on the step connecting plate 3 is connected with the connecting through hole on the step plate 1 to form a complete connecting through hole, and the cross bar bolt 10 is used to successively break through the first through hole 9, the connecting through holes on the step plate 1 and the step connecting plate 3, and the second through hole, and nuts are used at both ends of the cross bar bolt 10 for fastening and connection, and the step plates 1 and the step connecting plate 3 are fastened and connected between the main load-bearing rod and the secondary load-bearing rod.

[0032] refer to Figures 1 to 3 Preferably, the main load-bearing rod includes a first rod body 7 and a first base 5. The lower end of the first base 5 is installed on the bottom surface of the foundation pit, and the upper end is connected to the lower end of the first rod body 7 in a height-adjustable manner to adapt to the uneven bottom surface of the deep foundation pit, with strong adaptability; the first rod body 7 includes a plurality of first load-bearing rod units 11, and the plurality of first load-bearing rod units 11 are connected end to end in sequence in a detachable manner. Further preferably, the first rod body 7 is in the shape of a hollow cylinder, that is, the first load-bearing rod unit 11 is in the shape of a hollow cylinder, and the first load-bearing rod units 11 are connected by a socket-type connection, that is, a third connecting sleeve 12 is provided at the lower end of each first load-bearing rod unit 11, and a fourth connecting sleeve 13 that can be sleeved in the third connecting sleeve 12 is provided at the upper end, wherein the tube diameter of the third connecting sleeve 12 is smaller than the diameter of the first rod body 7; a first through hole 9 is provided on the third connecting sleeve 12 and the fourth connecting sleeve 13, and when the third connecting sleeve 12 is inserted into the fourth connecting sleeve 13, the first through hole 9 on the third connecting sleeve 12 is connected with the first through hole 9 on the fourth connecting sleeve 13, and when installing the stairs, the cross bar bolt 10 is used to pass through the first through holes 9 on the fourth connecting sleeve 13 and the third connecting sleeve 12 in sequence and is fastened with a nut.

[0033] refer to Figure 1 and Figure 2 Preferably, the secondary load-bearing rod comprises a second rod body 6 and a second base 4, the lower end of the second base 4 is installed on the bottom surface of the foundation pit, and the upper end is connected to the lower end of the second rod body 6 in a height-adjustable manner to adapt to the uneven bottom surface of the deep foundation pit, and has strong adaptability; the second rod body 6 comprises a plurality of second load-bearing rod units, and the plurality of second load-bearing rod units are connected end to end in a detachable manner. Further preferably, the second rod body 6 is in a hollow cylindrical shape, that is, the second load-bearing rod unit is in a hollow cylindrical shape, and the second load-bearing rod units are connected by a socket-type connection, that is, a section of a fifth connecting sleeve is provided at the lower end of each second load-bearing rod unit, and a section of a sixth connecting sleeve that can be sleeved in the fifth connecting sleeve is provided at the upper end, and the diameter of the fifth connecting sleeve is smaller than the diameter of the second rod body 6, and connecting holes are provided on the fifth connecting sleeve and the sixth connecting sleeve, and when the fifth connecting sleeve is sleeved into the sixth connecting sleeve, the connecting hole on the fifth connecting sleeve is connected with the connecting hole on the sixth connecting sleeve, and is fastened and connected by bolts.

[0034] refer to Figures 4 to 6Preferably, a first connecting sleeve 17 is provided at the upper end of the first base 5, a second connecting sleeve 14 which can be sleeved in the first connecting sleeve 17 is provided at the lower end of the first rod 7, and the diameter of the second connecting sleeve 14 is smaller than the diameter of the first rod 7, and a height adjustment device is provided between the first connecting sleeve 17 and the first rod 7; the first connecting sleeve 17 is provided with a plurality of third through holes 16 spaced from bottom to top, and the second connecting sleeve 14 is provided with a plurality of fourth through holes 15 corresponding to the third through holes 16 spaced from bottom to top, and the height of the first base 5 is adjusted by selecting and connecting the corresponding third through holes 16 and the fourth through holes 15 through the height adjustment device, and the connection is made through the fixing pin. Among them, the connection structure between the second base 4 and the second rod 6 is the same as the connection structure between the first base 5 and the second rod 6. Further preferably, the height adjustment device includes at least one height adjustment ring 23 movably sleeved on the second connecting sleeve 14, and the height of the base is adjusted by increasing and decreasing the number of height adjustment rings 23.

[0035] refer to Figure 4 Preferably, the fixed latch includes a pin shaft 22, two locking blocks 19 and an elastic ring buckle; a cavity 18 is provided at the front end of the pin shaft 22; each locking block 19 is in the shape of a "7", and the two locking blocks 19 are relatively distributed left and right and are installed in the cavity 18 in a manner that can be flipped forward and backward, and an elastic mechanism is provided between each locking block 19 and the pin shaft 22; when the locking block 19 is not subjected to external force, the elastic mechanism causes the locking block 19 to flip forward and open; when the locking block 19 is subjected to external force greater than the force of the elastic mechanism, the locking block 19 can overcome the force of the elastic mechanism and flip backward and be stored in the cavity 18; the elastic ring buckle includes two semicircular buckles 21, the rear ends of the two buckles 21 are connected to the rear end of the pin shaft 22, and the two buckles 21 are distributed in a manner that the semicircular concave arc surfaces are relatively left and right, and the front ends of the two buckles 21 are provided with lock holes 20 corresponding to the lock blocks 19. When in use, the pin shaft 22 is passed through the third through hole 16 and the fourth through hole 15 on the base and the rod body. At this time, the locking block 19 will shrink into the cavity 18. After passing through the through hole, the locking block 19 returns to its original position under the action of the elastic mechanism, and then the locking block 19 and the locking hole 20 on the fastener 21 are locked with each other, thereby locking the base and the rod body to play a fixing role.

[0036] refer to Figure 1 Preferably, a metal mesh 8 is provided on the upper part of all the secondary load-bearing rods to improve the safety performance of the ladder cage, that is, no metal mesh 8 is provided on the lower part of all the secondary load-bearing rods, so that the staff can enter and exit freely at 360 degrees.

[0037] The ladder cage of the present invention has an overall cylindrical structure, good stability, and a small footprint, and can be applied to narrow and deep foundation pits. The ladder cage is installed without welding technology, which facilitates the disassembly and assembly of the ladder cage, so that the ladder cage can be reused, thereby improving the utilization rate of the ladder cage.

[0038] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A socket-and-spigot type circular ladder cage for deep foundation pit construction, characterized in that: include: A main load-bearing rod, which is installed vertically in the foundation pit in a height-adjustable manner; A plurality of secondary load-bearing rods, each of which is vertically installed in the foundation pit in a height-adjustable manner, all of which are evenly distributed along the same circumference, and the circumferences of which are coaxially distributed with the main load-bearing rods, and all of which are connected into one by a fixing ring; and A staircase is detachably mounted between the main load-bearing rod and the secondary load-bearing rod, and the staircase is distributed in a spiral shape from bottom to top; The staircase comprises a plurality of step plates, each of which is distributed in a fan shape, and each of which is connected to the main load-bearing rod and the corresponding two secondary load-bearing rods in a detachable manner through a step connector. Wherein, the step connection member comprises two cross bar bolts, the front and rear ends of each step plate are provided with connecting through holes, each of the connecting through holes is provided with a cross bar bolt movably sleeved therein, the main load-bearing rod is provided with a first through hole at a position corresponding to the cross bar bolt of each step plate, and each of the secondary load-bearing rods is provided with a second through hole at a position corresponding to the cross bar bolt of each step plate, and each cross bar bolt passes through the corresponding first through hole and the corresponding second through hole and is fastened and connected by a nut; Among them, the main load-bearing rod includes a first rod body and a first base, the lower end of the first base is installed on the bottom surface of the foundation pit, and the upper end is connected to the lower end of the first rod body in a height-adjustable manner; the first rod body includes a plurality of first load-bearing rod units, and the plurality of first load-bearing rod units are connected end to end in sequence in a detachable manner.

2. The socket-and-spigot type circular ladder cage for deep foundation pit construction according to claim 1, characterized in that: A step connecting plate is arranged between the two step plates, and one end of the step connecting plate connected to the step plate is provided with the connecting through hole sleeved on the cross bar bolt.

3. The socket-and-spigot type circular ladder cage for deep foundation pit construction according to claim 1, characterized in that: The secondary load-bearing rod includes a second rod body and a second base, the lower end of the second base is installed on the bottom surface of the foundation pit, and the upper end is connected to the lower end of the second rod body in a height-adjustable manner; the second rod body includes a plurality of second load-bearing rod units, and the plurality of second load-bearing rod units are connected end to end in sequence in a detachable manner.

4. The socket-and-spigot type circular ladder cage for deep foundation pit construction according to claim 3 is characterized in that: A first connecting sleeve is disposed at the upper end of the first base, a second connecting sleeve that can be sleeved in the first connecting sleeve is disposed at the lower end of the first rod body, and the diameter of the second connecting sleeve is smaller than the diameter of the first rod body, and a height adjustment device is disposed between the first connecting sleeve and the first rod body; a plurality of third through holes are disposed on the first connecting sleeve at intervals from bottom to top, The second connecting sleeve is provided with a plurality of fourth through holes corresponding to the third through holes at intervals from bottom to top, and the corresponding third through holes and the fourth through holes are selectively connected through the height adjustment device and connected through a fixing pin; Wherein, the connection structure between the second base and the second rod body is the same as the connection structure between the first base and the first rod body.

5. The socket-and-spigot type circular ladder cage for deep foundation pit construction according to claim 4, characterized in that: The fixing latch comprises: A pin shaft, the front end of which is provided with a cavity; Two locking blocks, each of which is in the shape of a letter "7", are relatively distributed on the left and right sides and are installed in the cavity in a manner that they can be flipped forward and backward, and an elastic mechanism is provided between each of the locking blocks and the pin shaft; when the locking block is not subjected to an external force, the elastic mechanism causes the locking block to flip forward and open; when the locking block is subjected to an external force greater than the force of the elastic mechanism, the locking block can overcome the force of the elastic mechanism and flip backward and be stored in the cavity; and An elastic ring buckle includes two semicircular arc-shaped fasteners, the rear ends of the two fasteners are connected to the rear end of the pin shaft, and the two fasteners are distributed in a left-right opposite manner with semicircular arc-shaped concave surfaces, and the front ends of the two fasteners are provided with locking holes corresponding to the locking blocks.

6. The socket-and-spigot type circular ladder cage for deep foundation pit construction according to claim 4, characterized in that: The height adjustment device comprises at least one height adjustment ring movably sleeved on the first connecting sleeve.

7. The socket-and-spigot type circular ladder cage for deep foundation pit construction according to claim 1, characterized in that: The upper parts of all the secondary load-bearing rods are provided with metal meshes.

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