Shaft foundation steel structure protective cover

Abstract

The application discloses a shaft foundation pit steel structure protective cover, which comprises a long-cylinder type protective cover main body, the long-cylinder type protective cover main body comprises a plurality of single-section protective components arranged in sequence from top to bottom, connecting nuts are arranged between two adjacent single-section protective components, a mesh cover is arranged on the top of the uppermost single-section protective component, and protective wire meshes are welded on the outer sides of the single-section protective components. The application has the advantages of scientific and reasonable design, mature and standard manufacturing process, convenient and efficient installation, safety and reliability, economic practicability, and the like, can be assembled and disassembled, and can be repeatedly used, and the round customized mesh cover can supplement the protective function, further improves the safety guarantee system, effectively makes up the safety short board of the traditional protective process, can completely replace the traditional on-site concrete pouring wall protection process, guarantees the construction safety, meets the development requirements of the power transmission line infrastructure project, is suitable for large-scale popularization and application in the power transmission line infrastructure project and similar small shaft projects, and has remarkable economic benefits, social benefits and industry popularization value.

Description

Technical Field

[0001] This invention belongs to the field of construction safety protection technology, specifically relating to steel structure protective covers for vertical shaft foundation pits. Background Technology

[0002] Shaft foundation pits typically refer to deep pits excavated for the construction of underground shaft structures. In manual excavation of shaft foundation pits for power transmission line towers, on-site concrete pouring for retaining walls is commonly used. This requires the bulk transportation of loose materials such as cement, sand, gravel, and formwork. In remote mountainous areas and regions with inconvenient transportation, material transportation costs are high and efficiency is low. Furthermore, the construction process is cumbersome and time-consuming, requiring multiple steps such as formwork erection, concrete mixing, pouring, vibration, and curing. The curing period for a single retaining wall section is long, and inadequate on-site curing conditions can easily lead to insufficient strength, cracking, and other quality problems, resulting in protective failure. At the same time, the concrete retaining wall has poor geological adaptability. Under complex geological conditions such as expansive soil, silty soil, and gravel, the concrete retaining wall is prone to deformation, detachment, or even complete collapse due to uneven lateral pressure from the soil, causing major safety accidents such as falling objects and burying people. Therefore, there is an urgent need for a steel structure protective cover for shaft foundation pits to solve the above problems. Summary of the Invention

[0003] In view of the problems raised in the background art above, the purpose of the present invention is to provide a steel structure protective cover for vertical shaft foundation pits.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows: The steel structure protective cover for the vertical shaft foundation pit includes a long cylindrical protective cover body, which includes several single protective components arranged sequentially from top to bottom. Connecting nuts are installed between two adjacent single protective components. A mesh cover is installed on the top of the uppermost single protective component, and a protective mesh is welded to the outside of the single protective component.

[0005] Furthermore, the single-section protective assembly comprises an outer layer and an inner layer, which are fixed together by welding. This structural design facilitates individual production.

[0006] Further specifying, the outer layer comprises several circular steel frames evenly arranged from top to bottom, with several reinforcing ribs evenly welded and installed between the circular steel frames. Each of the reinforcing ribs has threads on its upper and lower sides that match the connecting nuts. The reinforcing ribs are made of cylindrical steel bars. This structural design forms a stable circular frame, primarily bearing the lateral pressure of the pit's inner wall and resisting well wall deformation.

[0007] Further specifying, the inner layer includes stirrups, on which are provided a plurality of evenly arranged support connectors. Each support connector has a plurality of evenly arranged pre-drilled holes for main reinforcing bars, centered on the center of the stirrup. The stirrups are made of angle steel. This structural design can be directly converted into a foundation reinforcement cage during installation, achieving an organic integration of protection and reinforcement cage functions, eliminating the need for separate reinforcement cage fabrication.

[0008] Furthermore, the stirrups are welded and installed on the reinforcing ribs between two adjacent circular steel frames. This structural design ensures uniform installation and improves overall strength.

[0009] Furthermore, the connecting nut has threaded grooves on its upper and lower sides that match the threaded threads, with the upper and lower threaded grooves arranged in opposite directions within the connecting nut. This structural design allows for quick docking and tightening of the upper and lower single-section protective components, ensuring convenient operation and a secure connection.

[0010] Furthermore, the mesh cover has clearance holes around its perimeter that match the threaded screws, and the mesh cover is installed on top of the single-section protective assembly through these clearance holes. This structural design facilitates the installation and placement of the mesh cover.

[0011] Furthermore, the protective mesh is evenly laid between two adjacent circular steel frames and fixed by welding. This structural design effectively blocks soil, rocks, and debris falling from the inner wall of the pit, preventing injuries from falling objects.

[0012] The beneficial effects of this invention are as follows: 1. This invention utilizes prefabrication in the factory, requiring only assembly and connection on-site. It eliminates the need to transport loose materials such as concrete, cement, and sand, thus saving the tedious curing process of concrete retaining walls, significantly shortening the construction period, greatly improving the overall project progress efficiency, and reducing construction costs.

[0013] 2. The present invention is a high-strength steel rigid structure, which can effectively resist the lateral pressure of complex geological conditions such as expansive soil and flowing soil, avoid the problems of cracking and falling off of concrete retaining walls, significantly improve the protection stability, and effectively adapt to complex geological conditions such as expansive soil and flowing soil that traditional retaining walls cannot handle. The steel rigid structure has a stable protection effect, can effectively resist the pressure of the inner wall of the foundation pit, prevent the well wall from collapsing and deforming, reduce the risk of foundation pit collapse, and ensure construction safety.

[0014] 3. This invention achieves full-scale enclosed protection during the excavation of the foundation pit. Combined with a reusable circular mesh cover, it provides comprehensive protection against falling objects, collapses, and the risk of people and animals accidentally falling in. It can also effectively save on material, labor, machinery, and construction costs. The factory-prefabricated materials have low loss and high utilization rate, and the overall cost is lower than that of traditional concrete retaining wall technology. At the same time, it eliminates the cost of separately manufacturing steel cages, resulting in outstanding economic benefits. Attached Figure Description

[0015] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings; Figure 1 This is a schematic diagram of the overall structure of the steel structure protective cover for the vertical shaft foundation pit according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a single protective component of the steel structure protective cover for a vertical shaft foundation pit according to an embodiment of the present invention; Figure 3 This is a top view schematic diagram of a single protective component of the steel structure protective cover for a vertical shaft foundation pit according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the connecting nut structure of the steel structure protective cover for the vertical shaft foundation pit according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the mesh cover structure of the steel structure protective cover for the vertical shaft foundation pit according to an embodiment of the present invention; The symbols for the main components are explained below: The main body of the long cylindrical protective cover consists of: 1. Single-section protective component; 2. Connecting nut; 3. Mesh cover; 4. Protective mesh; 5. Outer layer; 6. Inner layer; 7. Round steel frame; 8. Reinforcing rib; 9. Threaded thread; 10. Stirrup; 11. Support connector; 12. Main steel bar reserved hole; 13. Threaded groove; 14. Clearance hole; 15. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Example 1, as Figure 1 , Figure 2 and Figure 3 As shown, the steel structure protective cover for the vertical shaft pit includes a long cylindrical protective cover body 1 consisting of several single protective components 2 arranged sequentially from top to bottom. Connecting nuts 3 are installed between two adjacent single protective components 2. A mesh cover 4 is installed on the top of the uppermost single protective component 2, and a protective mesh 5 is welded and installed on the outside of the single protective component 2.

[0018] In this embodiment, when workers are excavating the foundation of the vertical shaft pit, they first dig downwards and then install a single-section protective component 2. After that, for every meter of excavation downwards, a second single-section protective component 2 is immediately installed on top of the already installed single-section protective component 2 by connecting nuts 3, and so on, until the foundation pit is excavated to the design depth. After the foundation pit is excavated, the protective cover does not need to be removed. Reinforcing bars are directly inserted into the single-section protective component 2 to form a foundation reinforcement cage, which is directly solidified with the concrete structure to jointly bear the foundation load, realizing the organic integration of protection and foundation structure. This ensures construction safety and improves construction efficiency. When there is no work (or at night), a detachable net cover 4 can be installed on the top of the single-section protective component 2 as needed to prevent personnel and animals from accidentally falling in. The protective net 5 on the outside of the single-section protective component 2 further improves the protective function and ensures the safety of underground workers.

[0019] By adopting a modular approach, multiple individual protective components 2 are connected vertically by connecting nuts 3 to form a long cylindrical integrated protective structure. Installation and connection can be completed manually without the need for large machinery, effectively lowering the construction threshold. After connection, the overall rigidity is strong and the stability is good. The modular approach is small in size and moderate in weight after being disassembled, which greatly improves the convenience of transportation and manual loading and unloading. It is especially suitable for construction scenarios with inconvenient transportation, such as remote areas and mountainous areas, effectively reducing the difficulty of on-site construction preparation and improving the efficiency of construction preparation.

[0020] This method eliminates the need for cumbersome processes such as concrete mixing, transportation, formwork, pouring, and curing, enabling on-site protection during excavation and rapid assembly. Construction efficiency is increased by over 50% compared to traditional methods, significantly shortening the construction cycle for single-pit protection. It effectively addresses the long construction period of traditional methods, eliminating on-site wet work and effectively avoiding material waste and environmental pollution during concrete pouring and curing. The construction site is clean and orderly, meeting green construction requirements and practicing energy conservation and environmental protection principles. The protective wall and reinforcing cage are integrated and permanently embedded in the foundation, eliminating the need for subsequent dismantling and reducing the need for separate reinforcing cage fabrication. This further improves construction efficiency, reduces process integration costs and manpower input, and enhances adaptability to adverse geological conditions such as expansive soil and silt deposits. It effectively solves the problems of cracking, detachment, and protective failure of traditional concrete walls. The rigid steel structure provides more stable and reliable protection, reducing the risk of safety accidents.

[0021] Example 2, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure to the embodiment 1: the single-section protective component 2 includes an outer layer 6 and an inner layer 7, and the outer layer 6 and the inner layer 7 are fixed together by welding.

[0022] In this embodiment, the single-section protective component 2 is divided into two independent components: an outer layer 6 and an inner layer 7. After prefabrication in the factory, the two are firmly combined into a whole unit through welding. The outer layer 6 mainly undertakes the structural stress and lateral protection functions, while the inner layer 7 mainly undertakes the steel cage forming and internal support functions. The two work together to form a composite stress system, thereby improving the performance.

[0023] Example 3, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure based on embodiment 1: the outer layer 6 includes several round steel frames 8 evenly arranged from top to bottom, several reinforcing ribs 9 are evenly welded and installed between the several round steel frames 8, and the upper and lower sides of the several reinforcing ribs 9 are provided with threads 10 that match the connecting nut 3. The reinforcing ribs 9 are made of cylindrical steel bars.

[0024] In this embodiment, multiple circular steel frames 8 are evenly arranged from top to bottom to form an outer ring support frame. Reinforcing ribs 9 are evenly distributed along the circumference to connect the circular steel frames 8 into a whole, forming a stable cylindrical grid structure. The threads processed at the upper and lower ends of the reinforcing ribs 9 cooperate with the connecting nuts 3 to realize the mechanical connection of the upper and lower single-section protective components 2.

[0025] Example 4, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the inner layer 7 includes stirrups 11, and the stirrups 11 are provided with a number of evenly arranged support connectors 12. The support connectors 12 are centered on the center of the stirrups 11 and are evenly provided with a number of evenly arranged main steel bar reserved holes 13 along the center. The stirrups 11 are made of angle steel.

[0026] In this embodiment, the stirrups 11 made of angle steel form an inner ring-shaped reinforcing structure. The support connectors 12 are fixed on the stirrups 11 and evenly distributed along the circumference. The main steel bar reserved holes 13 on them are used to pass through the longitudinal main steel bars of the foundation, thus forming a foundation steel cage, which together with the subsequently poured concrete forms a reinforced concrete foundation structure.

[0027] Example 5, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure to the embodiment 1: the stirrups 11 are welded and installed on the reinforcing ribs 9 between two adjacent round steel frames 8.

[0028] In this embodiment, by precisely welding and fixing the stirrups 11 to the reinforcing ribs 9 between two adjacent round steel frames 8, the outer layer 6 and the inner layer 7 form an inseparable whole. The positions of the stirrups 11 are staggered with the round steel frames 8 to form an interlaced support system.

[0029] Example 6, as Figure 1 and Figure 4 As shown, this embodiment adds the following structure based on embodiment 1: the upper and lower sides of the inside of the connecting nut 3 are provided with thread grooves 14 that match the thread 10, and the upper and lower thread grooves 14 are arranged in opposite directions inside the connecting nut 3.

[0030] In this embodiment, the connecting nut 3 serves as the connecting member of the upper and lower single-section protective components 2. Its upper and lower ends are respectively machined with screw threads 14 with opposite directions of rotation. When it is necessary to connect the upper and lower single-section protective components 2, the screw thread 10 at the lower end of the upper single-section protective component 2 is aligned with the positive screw thread 14 at the upper end of the connecting nut 3, and the screw thread 10 at the upper end of the lower single-section protective component 2 is aligned with the negative screw thread 14 at the lower end of the connecting nut 3. Rotating the connecting nut 3 can simultaneously tighten and fix the upper and lower single-section protective components 2.

[0031] Example 7, as Figure 5 As shown, this embodiment adds the following structure to the embodiment 1: the periphery of the mesh cover 4 is provided with clearance holes 15 that match the screw threads 10, and the mesh cover 4 is installed and placed at the top of the single-section protective assembly 2 through the clearance holes 15.

[0032] In this embodiment, the clearance holes 15 around the perimeter of the mesh cover 4 correspond one-to-one with the screw threads 10 at the top of the top single-section protective component 2. During installation, the clearance holes 15 are aligned with the screw threads 10 and placed downwards, so that the mesh cover 4 is stably supported on the top round steel frame 8. At the same time, the screw threads 10 pass through the clearance holes 15 to play a positioning role, which can prevent the mesh cover 4 from undergoing horizontal displacement.

[0033] Example 8, as Figure 2 As shown, this embodiment adds the following structure to the embodiment 1: the protective mesh 5 is evenly laid between two adjacent round steel frames 8 and fixed by welding.

[0034] In this embodiment, the protective mesh 5 is tightly laid between two adjacent round steel frames 8. The edges of the protective mesh 5 are firmly welded to the round steel frames 8 by full welding to form a continuous lateral protective barrier. This ensures that the protective mesh 5 is laid flat and firmly without damage or loosening, effectively blocking soil, rocks and debris falling from the inner wall of the pit, preventing falling objects from injuring people, further improving the protective function, and ensuring the safety of underground workers.

[0035] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A steel structure protective cover for a vertical shaft foundation pit, comprising a long cylindrical protective cover body (1), characterized in that: The main body (1) of the long cylindrical protective cover includes several single protective components (2) arranged sequentially from top to bottom. A connecting nut (3) is installed between two adjacent single protective components (2). A mesh cover (4) is installed on the top of the uppermost single protective component (2). A protective mesh (5) is welded to the outside of the single protective component (2).

2. The steel structure protective cover for vertical shaft foundation pit according to claim 1, characterized in that: The single-section protective assembly (2) includes an outer layer (6) and an inner layer (7), which are fixed together by welding.

3. The steel structure protective cover for vertical shaft foundation pit according to claim 2, characterized in that: The outer layer (6) includes several round steel frames (8) evenly arranged from top to bottom. Several reinforcing ribs (9) are evenly welded and installed between the several round steel frames (8). The upper and lower sides of the several reinforcing ribs (9) are provided with threads (10) that match the connecting nut (3). The reinforcing ribs (9) are made of cylindrical steel bars.

4. The steel structure protective cover for vertical shaft foundation pit according to claim 3, characterized in that: The inner layer (7) includes stirrups (11), and the stirrups (11) are provided with a number of evenly arranged support connectors (12). The support connectors (12) are centered on the center of the stirrups (11) and are provided with a number of evenly arranged main steel bar reserved holes (13) along the center. The stirrups (11) are made of angle steel.

5. The steel structure protective cover for vertical shaft foundation pit according to claim 4, characterized in that: The stirrups (11) are welded and installed on the reinforcing bars (9) between two adjacent round steel frames (8).

6. The steel structure protective cover for vertical shaft foundation pit according to claim 5, characterized in that: The connecting nut (3) has thread grooves (14) on its upper and lower sides that match the thread (10). The thread grooves (14) on the upper and lower sides are arranged in opposite directions inside the connecting nut (3).

7. The steel structure protective cover for vertical shaft foundation pit according to claim 6, characterized in that: The mesh cover (4) has a clearance hole (15) around its perimeter that matches the thread (10), and the mesh cover (4) is installed on the top of the single-section protective assembly (2) through the clearance hole (15).

8. The steel structure protective cover for vertical shaft foundation pit according to claim 7, characterized in that: The protective mesh (5) is evenly laid between two adjacent round steel frames (8) and fixed by welding.

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