A deep foundation pit ladder cage reinforcing platform

Abstract

The application discloses a deep foundation pit ladder cage reinforcing platform, which comprises a plurality of upper and lower spliced ladder cage sections, and a hanging plate is arranged on the ladder cage section; the hanging plate is hung on a platform beam; the platform beam is arranged between steel pipe piles at front and back sides, or the platform beam is arranged between the steel pipe pile at the front side and a corbel at the back side; the steel pipe pile is arranged on a foundation pit bottom of a foundation pit; and the corbel is arranged on a foundation pit wall of the foundation pit. The application has the advantages that the reinforcing platform is simple in manufacturing and convenient in installation; the platform divides the stress of the ladder cage into two parts; and the defects of the reinforcing ladder cage without concrete support in the middle of the deep foundation pit are ingeniously solved. During use, the whole ladder cage is in good stability, high safety and high applicability; the ladder cage does not appear deformation, shaking, displacement and other phenomena; the safety and worry-free passing of the deep foundation pit operating personnel are ensured; the application provides a passing hub for the on-schedule, on-quality and on-quantity completion of the project; and the successful application of the ladder cage reinforcing platform provides a solid and reliable basis for the subsequent operation under the same or similar working conditions.

Description

Technical Field

[0001] This application belongs to the field of foundation pit construction technology, specifically relating to a deep foundation pit ladder cage reinforcement platform. Background Technology

[0002] Ladder cages provide access for workers in deep foundation pits, playing a crucial role as a vital link in the construction process. Their installation methods vary depending on the working conditions. In ultra-deep foundation pits where only the first layer is supported by concrete and the rest by steel, conventional ladder cage installation and reinforcement methods are unsuitable for the environment. Furthermore, the fixed installation procedures cannot guarantee stability and safety. Utility Model Content

[0003] The purpose of this application is to provide a reinforced platform for deep foundation pit ladder cages. The reinforced platform is designed for ultra-deep foundation pits without concrete support in the middle. It is highly targeted to the installation environment, can better fit the actual construction conditions on site, and increases the operability of construction. It ensures both smooth access for personnel and normal performance of the ladder cage.

[0004] The objective of this application is achieved through the following technical solution:

[0005] A deep foundation pit ladder cage reinforcement platform includes several ladder cage sections spliced ​​together vertically. The ladder cage sections are equipped with hanging plates, which are hung on platform beams. The platform beams are located between front and rear steel pipe piles, or between front steel pipe piles and rear corbels. The steel pipe piles are located on the bottom of the foundation pit, and the corbels are located on the foundation pit walls.

[0006] Furthermore, support beams are provided between the pit opening beams, and inter-segment tie ropes connect the support beams to the ladder cage sections. Inter-segment tie ropes also connect the spaced ladder cage sections, and hanging plates are hung on the support beams.

[0007] Furthermore, the pithead beam is a reinforced concrete beam, the supporting beam is an I-beam, and the inter-segment tie rope is a steel wire rope.

[0008] Furthermore, the foundation pit wall is equipped with connecting plates, and a front tie rope is connected between the connecting plates and the front end of the ladder cage section, and a rear stabilizing beam is connected between the connecting plates and the rear end of the ladder cage section.

[0009] Furthermore, the connecting plate is a double-section I-beam, the front tie rope is a steel wire rope, and the rear stabilizing beam is a double-section channel steel.

[0010] Furthermore, the ladder cage section includes uprights, connecting pipes, pipe beams, ladder platforms, and steps. Several uprights are arranged vertically. The upper end of the uprights is connected to the connecting pipe of the upper section, and the lower end of the uprights is connected to the connecting pipe of the current section. Pipe beams are connected between the uprights, and ladder platforms are provided between the pipe beams. Steps are connected between the ladder platforms of the upper section and the ladder platforms of the current section.

[0011] Furthermore, a stable scaffold is installed between the lowest ladder cage section and the bottom of the pit.

[0012] Furthermore, the corbel is a reinforced concrete corbel, and the reinforcing bars of the corbel are located inside the retaining piles.

[0013] Furthermore, the platform beam includes a platform crossbeam and a platform longitudinal beam. The platform crossbeam is located between the front and rear steel pipe piles, or between the front steel pipe pile and the rear corbel. The platform longitudinal beam is located between the platform crossbeams, and the hanging plate is hung on the platform crossbeam and / or the platform longitudinal beam.

[0014] Furthermore, the mounting plate is T-shaped.

[0015] The beneficial effects of this application are:

[0016] (1) Social Benefit Prediction Analysis: The reinforced platform is simple to manufacture and easy to install. The platform divides the stress of the ladder cage in two, cleverly solving the defect of the ladder cage in deep foundation pits without concrete support in the middle. During use, the overall stability of the ladder cage is good, with high safety performance and strong applicability. The ladder cage did not deform, shake, or shift, ensuring that the workers in the deep foundation pit can pass safely and with peace of mind. It provides a passage hub for the timely, high-quality, and high-quantity completion of the project. The successful application of the reinforced ladder cage platform provides a solid and reliable basis for subsequent launches under the same or similar working conditions.

[0017] (2) Economic benefit forecast analysis: Compared with the traditional adjustment support (steel support to concrete support), the reinforced platform saves 25t of steel bars and 130 cubic meters of concrete, saving a total cost of about RMB155,000 and saving about 3 months of construction period (change procedures).

[0018] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description

[0019] Figure 1 This is the main view of the structure of Embodiment 1 of this application.

[0020] Figure 2 This application Figure 1 The enlarged view of the upper part.

[0021] Figure 3 This application Figure 1 Enlarged view of the lower part.

[0022] Figure 4 This is a plan view of the platform beam in Embodiment 1 of this application.

[0023] Figure 5 This is a front view of the structure of the cow leg in Embodiment 1 of this application.

[0024] Figure 6 These are side views of the structures in embodiments 1 and 2 of this application.

[0025] Figure 7 These are schematic diagrams of the pithead beams in embodiments 1 and 2 of this application.

[0026] Figure 8 This is a plan view of the connecting plate in embodiments 1 and 2 of this application.

[0027] Figure 9 These are the front views of the hanging panel structures in embodiments 1 and 2 of this application.

[0028] Figure 10 This is the main view of the structure of Embodiment 2 of this application.

[0029] Figure 11 This application Figure 10 The enlarged view of the upper part.

[0030] Figure 12 This application Figure 10 Enlarged view of the lower part.

[0031] Figure 13 This is a plan view of the platform beam in Embodiment 2 of this application.

[0032] Figure 14 This is the main structural view of the steel pipe pile in Embodiment 2 of this application.

[0033] In the diagram: 1-Pit opening beam, 2-Pit wall, 3-Pit bottom, 4-Ladder cage section, 5-Support beam, 6-Inter-section tie rope, 7-Connecting gusset plate, 8-Front tie rope, 9-Rear stabilizing beam, 10-Steel pipe pile, 11-Corner, 12-Platform beam, 13-Hanging plate; 401-Column, 402-Connecting pipe, 403-Pipe beam, 404-Ladder platform, 405-Step ladder, 406-Stabilized scaffolding; 701-Tie ring; 1101-Rebar installation. Detailed Implementation

[0034] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0035] Example 1

[0036] refer to Figures 1-9As shown, a deep foundation pit ladder cage reinforcement platform is provided. This embodiment is applicable to scenarios where the ladder cage is located close to the foundation pit wall. It includes a pit opening beam 1, foundation pit wall 2, foundation pit bottom 3, ladder cage section 4, support beam 5, inter-section tie rope 6, connecting plate 7, front tie rope 8, rear stabilizing beam 9, steel pipe pile 10, corbel 11, platform beam 12, and hanging plate 13.

[0037] The pit opening beam 1, the pit wall 2, and the pit bottom 3 are the completed architectural structures of the pit itself. The ladder cage section 4 consists of several sections, which are spliced ​​together to form a complete ladder cage. The ladder cage provides passage for pit workers to move up and down, enabling safe and efficient pit construction operations.

[0038] The ladder cage section 4 is equipped with a hanging plate 13, which is hung on the platform beam 12. That is, the lower platform beam 12 supports a certain ladder cage section 4, improving the overall safety and stability of the ladder cage. At the same time, the hanging plate 13 can limit the ladder cage to prevent it from shifting or shaking.

[0039] The platform beam 12 is located between the front steel pipe pile 10 and the rear corbel 11. The steel pipe pile 10 is located on the bottom 3 of the foundation pit, and the corbel 11 is located on the foundation pit wall 2. Through the steel pipe pile 10 and the corbel 11, the load of the platform beam 12 is transferred to the foundation pit itself, and the foundation pit can ensure the stable placement of the platform beam 12.

[0040] Support beams 5 are provided between the pit opening beams 1. Support beams 5 are connected to the ladder cage sections 4 by inter-segment tie ropes 6. Inter-segment tie ropes 6 are connected between the interval ladder cage sections 4. Several ladder cage sections 4 form a section. Support beams 5 lift the uppermost ladder cage section 4 and lift adjacent ladder cage sections 4. Inter-segment tie ropes 6 realize the transmission of lifting force and ensure the lifting support of the entire ladder cage.

[0041] Hanging plate 13 is hung on support beam 5, that is, the uppermost cage section 4 is supported by the upper support beam 5, which improves the overall safety and stability of the cage. The pithead beam 1 is a reinforced concrete beam, the support beam 5 is an I-beam, and the inter-section tie rope 6 is a steel wire rope, which is tied to the connecting pipe 402 of the cage section 4.

[0042] The foundation pit wall 2 is equipped with a connecting plate 7 (steel waler). A front pull rope 8 is connected between the connecting plate 7 and the front end of the ladder cage section 4. The front pull rope 8 pulls on the front end of the ladder cage section 4 to ensure its stability and prevent it from shifting or swaying. A rear stabilizing beam 9 is connected between the connecting plate 7 and the rear end of the ladder cage section 4. The rear stabilizing beam 9 supports the rear end of the ladder cage section 4, also to ensure its stability and prevent it from shifting or swaying.

[0043] The connecting plate 7 is a double-section I-beam, installed simultaneously during the construction of the steel waler. The front tie rope 8 is a steel wire rope, and the rear stabilizing beam 9 is a double-section channel steel. A pull ring 701 is welded to the connecting plate 7. The rear end of the front tie rope 8 is tied to the pull ring 701, and the front end of the front tie rope 8 is tied to the column 401 of the cage section 4. The front end of the rear stabilizing beam 9 is welded to the pipe beam 403 of the cage section 4, and the rear end of the rear stabilizing beam 9 is welded to the connecting plate 7.

[0044] The ladder cage section 4 includes columns 401, connecting pipes 402, pipe beams 403, ladder platforms 404, and step ladders 405. The columns 401, connecting pipes 402, and pipe beams 403 are all made of square steel. Several columns 401 are arranged vertically, preferably four at the four corners. The upper end of each column 401 is bolted to the connecting pipe 402 of the upper section, and the lower end of each column 401 is bolted to the connecting pipe 402 of the same section. Pipe beams 403 are welded between the columns 401, and ladder platforms 404 are welded between the pipe beams 403. Step ladders 405 are bolted between the ladder platforms 404 of the upper section and the ladder platforms 404 of the same section. A stable scaffolding 406 is provided between the bottom of the ladder cage section 4 and the bottom of the pit 3 to maintain the relative stability of the bottom of the ladder cage section 4 and the soil surface.

[0045] The corbel 11 is a reinforced concrete corbel, and the rebar 1101 of corbel 11 is located inside the retaining pile. In this embodiment, the platform support consists of two steel pipe piles and two corbels. When the earthwork is excavated to the corresponding elevation, down-the-hole drill is used for drilling with casing. After reaching the design depth, concrete is poured into the steel pipe to increase its rigidity, forming a steel pipe pile. Reinforced concrete corbels are constructed simultaneously with the retaining wall of the foundation pit near the retaining piles. The rebar is connected to the retaining piles through rebar installation (the rebar installation meets relevant specifications), and two corbels are installed. The elevation and distance of the corbel surfaces correspond to the supporting column piles.

[0046] The platform beam 12 includes a platform crossbeam and platform longitudinal beams. The platform crossbeam is fixed between the front steel pipe pile 10 and the rear corbel 11. The front end of the platform crossbeam is welded and fixed to a connecting steel plate embedded in the steel pipe pile 10, and the rear end of the platform crossbeam is welded and fixed to a connecting steel plate embedded in the corbel 11. The platform longitudinal beams are welded between the platform crossbeams.

[0047] The cage has one steel section on each side. The steel section perpendicular to the direction of the adjacent foundation pit is connected to the steel pipe pile and the corbel respectively. The steel section is welded to the steel pipe pile. The steel section parallel to the direction of the adjacent foundation pit is welded to the steel section in another direction to increase the overall rigidity.

[0048] Hanging plates 13 are hung on the platform crossbeams and / or platform longitudinal beams to support the ladder cage section 4 from the front and rear and / or left and right. Hanging plates 13 are T-shaped and made of steel plates. The horizontal flanges of the hanging plate T-shape are connected to the connecting pipes and columns of the ladder cage section by high-strength bolts and are located at the four corners of the ladder cage. The vertical flanges of the hanging plate T-shape are hung on the structural steel to reinforce the ladder cage.

[0049] The assembly steps for the ladder cage reinforced platform are as follows: steel pipe pile driving (platform support bracket construction) → platform beam steel installation → ladder cage frame and hanging plate connection → ladder cage smoothly connected with earthwork excavation.

[0050] Example 2

[0051] refer to Figures 6-14 As shown, a reinforced platform for deep foundation pits with ladder cages is provided. This embodiment is suitable for scenarios where the ladder cage is located far from the foundation pit wall. The difference from the previous embodiment is that the platform beam 12 is positioned between the front and rear steel pipe piles 10. In this embodiment, the platform support consists of four steel pipe piles, with the platform crossbeam specifically positioned between the front and rear steel pipe piles 10.

[0052] Everything else is the same as in Example 1.

[0053] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0054] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A deep foundation pit ladder cage reinforcement platform, comprising several ladder cage sections spliced ​​vertically (4), characterized in that: The ladder cage section (4) is provided with a hanging plate (13), which is hung on the platform beam (12). The platform beam (12) is located between the front and rear steel pipe piles (10), or between the front steel pipe pile (10) and the rear corbel (11). The steel pipe piles (10) are located on the bottom (3) of the foundation pit, and the corbel (11) is located on the foundation pit wall (2).

2. The deep foundation pit ladder cage reinforcement platform according to claim 1, characterized in that: A support beam (5) is provided between the pit opening beam (1). The support beam (5) is connected to the ladder cage section (4) by a section tie rope (6). The ladder cage sections (4) are connected by a section tie rope (6). The hanging plate (13) is hung on the support beam (5).

3. The deep foundation pit ladder cage reinforcement platform according to claim 2, characterized in that: The pithead beam (1) is a reinforced concrete beam, the support beam (5) is an I-beam, and the inter-segment tie rope (6) is a steel wire rope.

4. The deep foundation pit ladder cage reinforcement platform according to claim 1 or 2, characterized in that: The foundation pit wall (2) is provided with a connecting plate (7), and a front pull rope (8) is connected between the connecting plate (7) and the front end of the ladder cage section (4), and a rear stabilizing beam (9) is connected between the connecting plate (7) and the rear end of the ladder cage section (4).

5. The deep foundation pit ladder cage reinforcement platform according to claim 4, characterized in that: The connecting plate (7) is a double-section I-beam, the front tie rope (8) is a steel wire rope, and the rear stabilizing beam (9) is a double-section channel steel.

6. The deep foundation pit ladder cage reinforcement platform according to claim 1, characterized in that: The ladder cage section (4) includes columns (401), connecting pipes (402), pipe beams (403), ladder platforms (404), and step ladders (405). Several columns (401) are arranged vertically. The upper end of the column (401) is connected to the connecting pipe (402) of the upper section, and the lower end of the column (401) is connected to the connecting pipe (402) of this section. Pipe beams (403) are connected between the columns (401). Ladder platforms (404) are provided between the pipe beams (403). Step ladders (405) are connected between the ladder platforms (404) of the upper section and the ladder platforms (404) of this section.

7. The deep foundation pit ladder cage reinforcement platform according to claim 1 or 6, characterized in that: A sturdy scaffold (406) is provided between the bottom ladder cage section (4) and the bottom of the pit (3).

8. The deep foundation pit ladder cage reinforcement platform according to claim 1, characterized in that: The corbel (11) is a reinforced concrete corbel, and the reinforcing bars (1101) of the corbel (11) are located inside the retaining piles.

9. The deep foundation pit ladder cage reinforcement platform according to claim 1 or 8, characterized in that: The platform beam (12) includes a platform crossbeam and a platform longitudinal beam. The platform crossbeam is located between the front and rear steel pipe piles (10), or between the front steel pipe pile (10) and the rear corbel (11). The platform longitudinal beam is located between the platform crossbeams. The hanging plate (13) is hung on the platform crossbeam and / or the platform longitudinal beam.

10. The deep foundation pit ladder cage reinforcement platform according to claim 1, characterized in that: The mounting plate (13) is T-shaped.

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