Foundation pit ramp structure

Abstract

The utility model discloses a foundation pit ramp structure, which belongs to the technical field of foundation pit building construction and comprises a foundation pit and a ramp body. A supporting structure is arranged in the foundation pit; the ramp body is connected with the supporting structure and comprises a plurality of ramp sections connected end to end, the ramp sections are sequentially and obliquely arranged from top to bottom, the ramp section located at the top is connected with an area outside a pit, the ramp section located at the bottom is connected with a construction area, and a plurality of supporting stand columns are arranged at the bottoms of the ramp sections. The height of the supporting stand columns is gradually reduced in the inclination direction of the ramp section. At least part of the ramp section coincides with the supporting structure in the height direction, and the supporting structure located in the coinciding area is sunken in the direction away from the ramp section. The ramp main body is established by utilizing the original supporting structure, the original supporting structure is not damaged, so that an engineering vehicle can directly reach a construction area in the pit, and the construction efficiency of the large-area deep foundation pit is improved while the stress safety of the supporting structure is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit construction, in particular to a foundation pit ramp structure. Background Art

[0002] Excavation of foundation pits is a crucial step in building construction, significantly impacting construction costs and duration. Traditionally, when the excavation depth is shallow, the excavation area is large, there is no internal support, or the surrounding environment is simple, an earthen ramp is typically used to access the pit floor. This is then combined with a long-reach excavator at the pit's edge for excavation. When the excavation depth is deep, internal support structures are present, and an earthen ramp is unsuitable, a trestle structure is often used as an access ramp. However, due to structural stability or other factors such as the limited pit area, the trestle structure should be small and often cannot reach the pit bottom, requiring the use of a long-reach excavator for excavation. The former earthen ramp is less expensive and is only suitable for shallow excavation depths and where conditions permit. The latter trestle structure, while applicable for slightly deeper excavations, is often unable to reach the pit bottom due to structural stability and site conditions, requiring additional equipment. This makes it unsuitable for deeper excavations and is also slightly more expensive. Utility Model Content

[0003] The purpose of the utility model is to provide a foundation pit ramp structure to solve the technical problems in the prior art that the foundation pit ramp has high construction costs and cannot directly reach the pit bottom.

[0004] As conceived above, the technical solution adopted by the utility model is:

[0005] A foundation pit ramp structure, comprising:

[0006] A foundation pit, wherein a support structure is provided inside the foundation pit;

[0007] The ramp body is connected to the supporting structure. The ramp body includes multiple ramp sections connected end to end. The multiple ramp sections are inclined in sequence from top to bottom. The ramp section at the top is connected to the area outside the pit, and the ramp section at the bottom is connected to the construction area. Multiple supporting columns are provided at the bottom of the ramp section, and the height of the supporting columns gradually decreases along the inclination direction of the ramp section; at least part of the ramp section overlaps with the supporting structure in the height direction, and the support structure located in the overlapping area is recessed in the direction away from the ramp section.

[0008] Preferably, the support structure includes concrete supports and trestles, a plurality of the concrete supports are arranged in a staggered manner in the horizontal and vertical directions in the foundation pit, and the trestles are connected to the concrete supports.

[0009] Preferably, a protective structure is provided around the outer periphery of the concrete support.

[0010] Preferably, the ramp body includes three ramp sections, which are the first ramp section, the second ramp section and the third ramp section from top to bottom. The second ramp section extends horizontally, and the first ramp section and the second ramp section are arranged at a first angle, and the third ramp section and the second ramp section are arranged at a second angle.

[0011] Preferably, the first angle and the second angle are greater than or equal to 120 degrees and less than or equal to 160 degrees.

[0012] Preferably, the support structure is provided at the top and bottom of the second ramp section, the support structure located at the top of the second ramp section is recessed upward to form an elevated area, and the support structure located at the bottom of the second ramp section is recessed downward to form a lowered area, and a passage area is formed between the elevated area and the lowered area.

[0013] Preferably, protective fences are provided on both sides of the ramp body.

[0014] Preferably, reinforcing ribs are provided at the connection between two adjacent ramp sections.

[0015] Preferably, the supporting column includes a base and a column, one end of the column is connected to the bottom of the ramp body, and the other end of the column is connected to the base, and the horizontal cross-section of the base is larger than the horizontal cross-section of the column.

[0016] Preferably, the supporting columns are made of prestressed steel.

[0017] Beneficial effects of the utility model:

[0018] The foundation pit ramp structure proposed by the present utility model can provide a convenient and safe passage for transport vehicles by setting a plurality of ramp sections connected end to end and inclined sequentially from top to bottom, thereby improving construction efficiency. A plurality of support columns are set at the bottom of the ramp section, and their height gradually decreases along the inclination direction of the ramp section, which can effectively disperse the pressure borne by the ramp, enhance the stability of the ramp, and reduce deformation and damage caused by pressure concentration. In addition, it can also prevent the occurrence of accidents such as slope sinking and collapse under complex geological conditions such as soft soil foundations, thereby ensuring construction safety. At least part of the ramp section overlaps with the support structure in the height direction, and the support structure located in the overlapping area is recessed in the direction away from the ramp section, preventing the spacing between the support structure and the ramp section from being too small, causing interference with the movement process of the transport vehicle, optimizing space utilization, and making the structure inside the foundation pit more compact and reasonable. The foundation pit ramp structure provided by the present utility model not only utilizes the original support structure, but also causes less disturbance to the support structure. The ramp body is combined with the supporting structure. The original supporting structure is used to build the ramp body at the reserved soil holes without destroying the original supporting structure. This allows engineering vehicles to directly reach the construction area in the pit, ensuring the stress safety of the supporting structure while improving the construction efficiency of large-scale deep foundation pits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the foundation pit ramp structure provided by an embodiment of the utility model;

[0020] Figure 2 is a schematic diagram of a support structure located at the top of the second ramp section provided by an embodiment of the present utility model;

[0021] Figure 3 It is a schematic diagram of the support structure located at the bottom of the second ramp section provided in an embodiment of the present utility model.

[0022] In the picture:

[0023] 10. Support structure; 101. Raised area; 102. Lowered area; 11. Concrete support; 12. Trestle; 13. Enclosure structure;

[0024] 20. Ramp main body; 21. First ramp section; 22. Second ramp section; 23. Third ramp section;

[0025] 30. Support column; 31. Base; 32. Column. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0030] See also Figures 1 to 3 The foundation pit ramp structure provided by the embodiment of the present utility model includes a foundation pit and a ramp body 20. A support structure 10 is provided inside the foundation pit; the ramp body 20 is connected to the support structure 10. The ramp body 20 includes multiple ramp sections connected end to end. The multiple ramp sections are arranged in an inclined manner from top to bottom. The ramp section at the top is connected to the area outside the pit, and the ramp section at the bottom is connected to the construction area. Multiple support columns 30 are provided at the bottom of the ramp section. The height of the support columns 30 gradually decreases along the inclination direction of the ramp section. At least part of the ramp section overlaps with the support structure 10 in the height direction, and the support structure 10 in the overlapping area is recessed in the direction away from the ramp section.

[0031] By setting up multiple ramp sections that are connected end to end and tilted from top to bottom, a convenient and safe passage can be provided for transport vehicles, thereby improving construction efficiency. Multiple support columns 30 are set at the bottom of the ramp section, and their height gradually decreases along the tilt direction of the ramp section, which can effectively disperse the pressure borne by the ramp section, enhance the stability of the ramp body 20, and reduce deformation and damage caused by pressure concentration. In addition, it can also prevent the ramp body 20 from sinking, collapsing, and other accidents under complex geological conditions such as soft soil foundations, thereby ensuring construction safety. At least part of the ramp section overlaps with the support structure 10 in the height direction, and the support structure 10 located in the overlapping area is recessed in the direction away from the ramp section, preventing the spacing between the support structure 10 and the ramp section from being too small, causing interference with the movement process of the transport vehicle, optimizing space utilization, and making the structure inside the foundation pit more compact and reasonable. The foundation pit ramp structure provided by the utility model not only utilizes the original support structure 10, but also causes less disturbance to the support structure 10. The ramp body 20 is combined with the supporting structure 10. The original supporting structure 10 is used to build the ramp body 20 at the reserved soil hole without destroying the original supporting structure 10. This allows engineering vehicles to directly reach the construction area in the pit, ensuring the stress safety of the supporting structure 10 while improving the construction efficiency of large-scale deep foundation pits.

[0032] Regarding the support structure 10, the support structure 10 includes concrete supports 11 and trestle bridges 12. Multiple concrete supports 11 are arranged horizontally and vertically in an alternating pattern within the foundation pit, with the trestle bridges 12 connected to the concrete supports 11. The multiple concrete supports 11 within the support structure 10 are arranged horizontally and vertically in an alternating pattern within the foundation pit, providing all-round, multi-angle support. The concrete supports 11 possess high strength and rigidity, capable of withstanding significant loads and effectively resisting the earth and water pressure on the pit sidewalls, thereby enhancing the overall stability of the pit. This prevents pit sidewall collapse and ensures the safety of surrounding buildings, underground construction workers, and transport vehicles. Even in poor geological conditions or deep pits, pit deformation can be effectively controlled. The connection between the trestle bridges 12 and the concrete supports 11 not only enhances the integrity and stability of the support structure 10 but also facilitates the movement and operation of construction workers and equipment within the pit. Transport vehicles and construction workers can directly reach various construction sites within the pit via the trestle bridges 12, improving construction efficiency and reducing construction time and costs.

[0033] Furthermore, a retaining structure 13 is installed around the perimeter of the concrete support 11, enhancing the contact stability between the concrete support 11 and the surrounding soil, effectively preventing erosion and damage to the concrete support 11 by the surrounding soil, and extending the service life of the concrete support 11. Furthermore, double-row purlins are installed around each floor of the retaining structure 13, and rib braces are installed at the joints between the concrete support 11 and the purlins to strengthen the structural load-bearing performance. The main body 20 of the ramp is integrated with the purlins to ensure the integrity of the retaining structure 13.

[0034] About the ramp body 20. The ramp body 20 includes three ramp sections, namely the first ramp section 21, the second ramp section 22 and the third ramp section 23 from top to bottom. The second ramp section 22 extends horizontally, and the first ramp section 21 and the second ramp section 22 are arranged at a first angle, and the third ramp section 23 and the second ramp section 22 are arranged at a second angle. This design of segmented ramp sections with varying angles can better adapt to different height differences and terrain conditions of the construction site. The angle and length of each ramp section can be flexibly adjusted according to the actual terrain, thereby improving the applicability of the foundation pit ramp structure. The horizontally extending second ramp section 22 provides a relatively smooth transition area for the transport vehicle, reducing the bumps and instability of the transport vehicle when driving on the ramp body 20, and improving the safety and comfort of passage. When the transport vehicle passes through the second ramp section 22, the risk of cargo shaking and falling can be reduced. The setting of the first angle and the second angle helps to disperse the impact force generated when the transport vehicle travels on the ramp section, transfers the force more evenly to the support structure 10, reduces the burden on a single support point, and enhances the stability and durability of the entire ramp body 20.

[0035] In other embodiments, two, four, five or more ramp sections may be provided, and adaptive selection may be made according to the actual working conditions of the foundation pit, which is not limited here.

[0036] Specifically, the first and second angles are greater than or equal to 120 degrees and less than or equal to 160 degrees, ensuring the stability of the ramp structure while providing a relatively smooth transition. This can reduce vehicle bumps and impacts during uphill and downhill travel, resulting in smoother travel and reduced wear on vehicle components and the risk of cargo damage. This prevents the angles between ramp sections from being too large, which would result in the ramp body 20 being too steep, making it difficult for the transport vehicle to ascend the slope or even risking the vehicle slipping; and it also prevents the angles between ramp sections from being too small, which would result in the ramp body 20 being too flat, resulting in low efficiency and high cost.

[0037] More specifically, in this embodiment, support structures 10 are provided at both the top and bottom of the second ramp section 22. The support structure 10 at the top of the second ramp section 22 is recessed upward to form an elevated area 101, while the support structure 10 at the bottom of the second ramp section 22 is recessed downward to form a lowered area 102. A passageway is formed between the elevated area 101 and the lowered area 102. The provision of support structures 10 at both the top and bottom of the second ramp section 22 enhances its stability and load-bearing capacity, making it less susceptible to deformation or damage during frequent transport vehicle traffic or in extreme geological conditions, thereby ensuring safety and continuity during the construction process. The support structure 10 at the top of the second ramp section 22 is recessed upward to form an elevated area 101, and the support structure 10 at the bottom is recessed downward to form a lowered area 102, with a passage area formed in the middle. This design optimizes the spatial layout, making passage smoother, and prevents the support structure 10 from interfering with the movement of the transport vehicle, making it easier for multiple transport vehicles to pass through the area in an orderly manner, thereby improving transportation efficiency.

[0038] To enhance the safety of transport vehicles moving along the ramp body 20, protective fences are installed on both sides of the ramp body 20. These effectively prevent transport vehicles from straying from the ramp during movement, potentially leading to dangerous situations such as vehicle rollovers or slips, thus enhancing transportation safety. If a vehicle loses control due to a sudden malfunction or driver error, the protective fences block and restrict the vehicle, ensuring the safety of both the transport vehicle and construction workers.

[0039] In addition, reinforcing ribs are provided at the connection between two adjacent ramp sections, thereby enhancing the structural strength and stability of the connection, effectively preventing cracks, deformation or even breakage at the connection between two adjacent ramp sections when vehicles pass frequently or bear heavy loads, and ensuring the long-term safe use of the ramp body 20.

[0040] Regarding the support column 30. The support column 30 includes a base 31 and a column 32. One end of the column 32 is connected to the bottom of the ramp body 20, and the other end of the column 32 is connected to the base 31. The horizontal cross-section of the base 31 is larger than the horizontal cross-section of the column 32. Through the cooperation between the body and the base 31, the load transmitted by the ramp body 20 is effectively dispersed, the stability of the ramp body 20 is enhanced, and deformation and damage caused by uneven force are reduced. The horizontal cross-section of the base 31 is larger than the horizontal cross-section of the column 32, which increases the contact area between the base 31 and the ground, thereby reducing the pressure per unit area and improving the bearing capacity of the support column 30. In addition, the larger horizontal cross-section of the base 31 prevents the support column 30 from sinking into the ground under soft geological conditions, ensuring the effectiveness of the support. In addition, the larger cross-section of the base 31 can better resist horizontal forces, such as those generated by wind or earthquakes, improve the anti-lateral displacement ability of the entire support structure 10, and enhance the stability of the ramp in complex environments.

[0041] The supporting columns 30 are made of prestressed steel, which has high strength and rigidity, good fatigue resistance and durability, and can better withstand the pressure and tension from the ramp body 20, ensuring the stability of the foundation pit ramp structure.

[0042] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications are possible without departing from the spirit and scope of the present invention. Such changes and modifications are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit ramp structure, characterized in that: include: A foundation pit, wherein a support structure (10) is provided inside the foundation pit; A ramp body (20) is connected to the support structure (10), and the ramp body (20) includes a plurality of ramp sections connected end to end, and the plurality of ramp sections are arranged in an inclined manner from top to bottom, the ramp section at the top is connected to the area outside the pit, and the ramp section at the bottom is connected to the construction area, and a plurality of supporting columns (30) are arranged at the bottom of the ramp section, and the height of the supporting columns (30) gradually decreases along the inclination direction of the ramp section; at least part of the ramp section overlaps with the support structure (10) in the height direction, and the support structure (10) located in the overlapping area is recessed in the direction away from the ramp section.

2. The foundation pit ramp structure according to claim 1, characterized in that: The support structure (10) includes concrete supports (11) and trestle bridges (12). A plurality of the concrete supports (11) are arranged in a staggered manner in the horizontal and vertical directions in the foundation pit, and the trestle bridges (12) are connected to the concrete supports (11).

3. The foundation pit ramp structure according to claim 2, characterized in that: A protective structure (13) is provided on the outer periphery of the concrete support (11).

4. The foundation pit ramp structure according to claim 1, characterized in that: The ramp body (20) comprises three ramp sections, which are respectively a first ramp section (21), a second ramp section (22) and a third ramp section (23) from top to bottom. The second ramp section (22) extends horizontally. The first ramp section (21) and the second ramp section (22) are arranged at a first angle, and the third ramp section (23) and the second ramp section (22) are arranged at a second angle.

5. The foundation pit ramp structure according to claim 4, characterized in that: The first angle and the second angle are greater than or equal to 120 degrees and less than or equal to 160 degrees.

6. The foundation pit ramp structure according to claim 4, characterized in that: The support structure (10) is provided at the top and bottom of the second ramp section (22); the support structure (10) located at the top of the second ramp section (22) is recessed upward to form an elevated area (101); the support structure (10) located at the bottom of the second ramp section (22) is recessed downward to form a lowered area (102); and a passage area is formed between the elevated area (101) and the lowered area (102).

7. The foundation pit ramp structure according to any one of claims 1 to 6, characterized in that: Protective fences are provided on both sides of the ramp body (20).

8. The foundation pit ramp structure according to any one of claims 1 to 6, characterized in that: Reinforcing ribs are provided at the connection between two adjacent ramp sections.

9. The foundation pit ramp structure according to any one of claims 1 to 6, characterized in that: The supporting column (30) comprises a base (31) and a column (32), one end of the column (32) is connected to the bottom of the ramp body (20), and the other end of the column (32) is connected to the base (31), and the horizontal cross-section of the base (31) is larger than the horizontal cross-section of the column (32).

10. The foundation pit ramp structure according to any one of claims 1 to 6, characterized in that: The supporting columns (30) are made of prestressed steel.

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