A single-side supporting inclined pile bracing structure for foundation pit

Abstract

The utility model discloses a kind of foundation pit single-side support inclined pile support structure, it is related to urban construction field, including multiple radial bracing plates, two horizontal support beams, multiple vertical support beams, multiple reinforcing bars and inclined pile support assembly, by trapezoidal main frame formed by horizontal support beam and vertical support beam, and the I-shaped grid formed by combining reinforcing rod, connect radial bracing plate into a high stiffness integral stress surface, effectively resist soil pressure and reduce deformation, inclined pile support assembly adopts the way of upper inclined brace and lower inclined brace combination, multi-point support is carried out to the upper portion and middle portion of support structure, the stress performance of structure is significantly improved, stress concentration caused by single support point is avoided, by tensioning element and center connecting piece setting auxiliary cable, middle constraint is provided for upper inclined brace, prevent compression rod instability, greatly enhance the security and reliability of support system.

Description

Technical Field

[0001] This utility model relates to the field of urban construction, and in particular to a single-sided support inclined pile structure for foundation pits. Background Technology

[0002] Inclined piles are formed below the foundation slab by high-pressure jet grouting or forced grouting to create a cement-mixed solid body, which is then simultaneously implanted into the precast pile body to form a complete load-bearing system to resist the horizontal force transmitted by the support piles.

[0003] In urban construction, foundation pit engineering is a key link in the construction of foundations and underground spaces. For foundation pits that are adjacent to existing buildings, roads or pipelines, only one-sided support can often be carried out, that is, the support structure is only set on one side of the foundation pit, and the other side is the excavation space.

[0004] While existing diagonal bracing structures can partially solve the problem of internal space occupation, their support points are usually only set at the top of the support structure, resulting in insufficient stiffness in the middle of the support structure, which is prone to excessive deformation. At the same time, the stress concentration caused by a single support point can lead to instability of the compression member when the pressure is too high, resulting in poor support stability. Utility Model Content

[0005] The purpose of this utility model is to provide a single-sided support inclined pile structure for foundation pits to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a single-sided support inclined pile structure for foundation pits, comprising: Multiple radial support plates are laid out radially on the foundation pit support surface; Two transverse support beams are respectively horizontally installed on the upper and lower sides of the radial support plate; Multiple vertical support beams are arranged at equal intervals along the longitudinal direction between the two transverse support beams; Multiple reinforcing rods, each of which is connected between two adjacent vertical support beams; The inclined pile bracing assembly is installed on one side of the upper horizontal support beam and vertical support beam, and extends obliquely to the bottom of the foundation pit to support the radial support plate. The reinforcing rod has a connector at its center, which is connected to the inclined pile support assembly to provide auxiliary support for the inclined pile support assembly.

[0007] Preferably, the vertical support beam is provided with end connectors at both the upper and lower ends, and is connected to the upper and lower horizontal support beams through the end connectors, so that the horizontal support beams and the vertical support beams together form a trapezoidal frame structure.

[0008] Preferably, the reinforcing rod has side connectors at both ends, which are connected to the adjacent vertical support beams, so that the vertical support beams and the reinforcing rod together form an I-shaped frame structure.

[0009] Preferably, the connector is a central connector, which is fixedly disposed at the center of the reinforcing rod.

[0010] Preferably, the inclined pile support assembly includes multiple upper inclined support members and multiple lower inclined support members. The upper end of the upper inclined support member is connected to the horizontal support beam located above, and the upper end of the lower inclined support member is connected to the corresponding vertical support beam. The lower ends of both extend and are anchored to the bottom of the foundation pit.

[0011] Preferably, both the upper and lower diagonal braces include a base, at least one extension rod, a connector, a rotating component, a mounting head, and a rotating base.

[0012] Preferably, the base component is fixed to the bottom of the pit, the rotating base is rotatably connected to the base component, the rotating base is connected to one end of the extension rod through a flange, the extension rod can be set in multiple groups, adjacent extension rods are connected in sequence through flanges, the uppermost extension rod is connected to the connector through a flange, the connector is provided with a rotating component, the rotating component is rotatably connected to the mounting head, and the mounting head is used to connect to the horizontal support beam or the vertical support beam.

[0013] Preferably, a tension reinforcement member is connected to one of the extension rods of the upper diagonal brace. The tension reinforcement member is connected to the central connector via a tension steel wire to enhance the load-bearing performance of the upper diagonal brace.

[0014] The technical effects and advantages of this utility model are as follows: 1. By transferring the main supporting force to the bottom of the foundation pit through the inclined pile bracing assembly, the need to set up a large number of horizontal top supports inside the foundation pit is avoided, thus maximizing the release of working space inside the foundation pit. This is especially suitable for situations where the construction site is narrow and symmetrical support or anchor support cannot be used, which greatly improves construction efficiency and reduces mutual impact with adjacent plots.

[0015] 2. A trapezoidal main frame composed of transverse and vertical support beams, combined with an I-shaped grid formed by reinforcing bars, connects the radial support plates into a high-rigidity integral load-bearing surface, effectively resisting earth pressure and reducing deformation. Simultaneously, the inclined pile bracing assembly employs a combination of upper and lower inclined bracing members to provide multi-point support to the upper and middle parts of the support structure, significantly improving the structural stress performance and avoiding stress concentration caused by a single support point.

[0016] 3. The inclined pile bracing assembly adopts a modular design consisting of a foundation component and multiple extension rods connected by flanges. The length is flexibly adjustable to adapt to different pit depths and slopes. The top and bottom ends feature hinged designs with rotating bases and rotating components, ensuring that the rods primarily bear axial pressure and avoiding unfavorable bending stress.

[0017] 4. The auxiliary cables, provided by the tension reinforcement and central connector, provide intermediate constraints for the upper diagonal brace, preventing the compression member from becoming unstable and greatly enhancing the safety and reliability of the support system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a schematic diagram showing the connection between the radial support plate, the transverse support beam, and the vertical support beam of this utility model. Figure 4 This is a schematic diagram of the lower diagonal brace structure of this utility model; Figure 5 This is a schematic diagram of the upper diagonal brace structure of this utility model; Figure 6 This is a schematic diagram showing the connection between the horizontal support beam, the vertical support beam, and the reinforcing rod of this utility model.

[0019] In the diagram: 1. Excavation pit support surface; 2. Radial support plate; 3. Horizontal support beam; 4. Vertical support beam; 41. End connector; 5. Reinforcing rod; 51. Side connector; 52. Central connector; 6. Inclined pile brace assembly; 61. Upper inclined brace; 611. Foundation component; 612. Extension rod; 613. Connector; 614. Rotating component; 615. Mounting head; 616. Rotating base; 62. Lower inclined brace; 7. Tension reinforcement component. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides, for example Figures 1-6 The illustrated single-sided support inclined pile structure for foundation pit includes: Multiple radial support plates 2 are laid flat on the foundation pit support surface 1 in a radial direction. They directly contact and press against the foundation pit support surface 1, bear the lateral pressure from the soil, prevent the soil from collapsing and sliding, and form a flat support surface. Two transverse support beams 3 are horizontally installed on the upper and lower sides of the radial support plate 2, respectively; Multiple vertical support beams 4 are arranged at equal intervals along the longitudinal direction between two transverse support beams 3; Multiple reinforcing rods 5, each reinforcing rod 5 is connected between two adjacent vertical support beams 4; The inclined pile bracing assembly 6 is installed on one side of the upper horizontal support beam 3 and vertical support beam 4, and extends obliquely to the bottom of the pit to support the radial support plate 2. The inclined pile bracing component 6 is the main load-bearing component of the entire structure. Its function is to provide an upward inclined support force from the bottom of the foundation pit, actively balance the soil pressure transmitted from the foundation pit support surface 1, and prevent the entire support frame from overturning or displacing into the foundation pit.

[0022] The reinforcing rod 5 has a connector at its center, which is connected to the inclined pile support assembly 6 to provide auxiliary support for the inclined pile support assembly 6.

[0023] The transverse support beam 3 is a steel section. Two transverse support beams 3 are distributed at the upper and lower ends of the radial support plate 2, connecting multiple radial support plates 2 into a whole, and distributing the soil pressure transmitted from the radial support plate 2 evenly along the horizontal direction to the vertical support beam 4 and the inclined pile support assembly 6.

[0024] The vertical support beam 4 is a steel section, which is installed vertically between the upper and lower horizontal support beams 3 at equal intervals. As the main compression member, it transmits the load from the horizontal support beams 3 vertically. Together with the horizontal support beams 3, it forms the main frame and enhances the overall rigidity of the support system.

[0025] Example 1: The vertical support beam 4 is provided with end connectors 41 at both the upper and lower ends. The end connectors 41 are connected to the upper and lower horizontal support beams 3, so that the horizontal support beams 3 and the vertical support beam 4 together form a trapezoidal frame structure.

[0026] The radial support plate 2 is supported by a trapezoidal frame composed of horizontal support beam 3 and vertical support beam 4, which effectively enhances the support force of the radial support plate 2 and ensures that the radial support plate 2 supports the foundation pit support surface 1.

[0027] The end connector 41 and the side connector 51 can be made of high-strength bolts, welding plates or special clamps to achieve a reliable and firm connection between the vertical support beam 4 and the horizontal support beam 3, and ensure the stability of the frame structure.

[0028] The left and right ends of the reinforcing rod 5 are provided with side connectors 51, which are connected to the adjacent vertical support beam 4 through the side connectors 51, so that the vertical support beam 4 and the reinforcing rod 5 together form an I-shaped frame structure.

[0029] The connector is the central connector 52, which is fixedly installed at the center of the reinforcing rod 5.

[0030] The reinforcing bar 5 is usually made of angle steel, channel steel or round steel. It is installed between two adjacent vertical support beams 4. Its main function is to prevent the vertical support beams 4 from buckling locally or becoming laterally unstable. It connects multiple vertical support beams 4 and improves the deformation resistance of the main frame.

[0031] The central connector 52 can be configured as an ear plate or pull ring welded to the midpoint of the reinforcing rod 5. Its function is to provide an additional intermediate support point for the inclined pile brace assembly 6, and to change the force mode of the inclined brace by the tension wire, thereby improving stability.

[0032] Example 2: The inclined pile support assembly 6 includes multiple upper inclined support members 61 and multiple lower inclined support members 62. The upper end of the upper inclined support member 61 is connected to the horizontal support beam 3 located above, and the upper end of the lower inclined support member 62 is connected to the corresponding vertical support beam 4. The lower ends of both extend and are anchored to the bottom of the foundation pit.

[0033] The upper diagonal brace 61 supports the transverse support beam 3. Under the support of the transverse support beam 3 and the bottom limit of the pit, the radial support plate 2 is supported for the first time. The lower diagonal brace 62 supports the vertical support beam 4 connected between the adjacent transverse support beams 3. With the action of the vertical support beam 4, the center position of the radial support plate 2 is supported. At the same time, the vertical support beam 4 provides secondary support for the transverse support beam 3.

[0034] Both the upper diagonal brace 61 and the lower diagonal brace 62 include a base 611, at least one extension rod 612, a connector 613, a rotating part 614, a mounting head 615, and a rotating base 616.

[0035] The base component 611 is fixed to the bottom of the pit. The rotating base 616 is rotatably connected to the base component 611. The rotating base 616 is connected to one end of the extension rod 612 through a flange. The extension rod 612 can be set in multiple groups. Adjacent extension rods 612 are connected in sequence through flanges. The uppermost extension rod 612 is connected to the connector 613 through a flange. The connector 613 is provided with a rotating component 614. The rotating component 614 is rotatably connected to the mounting head 615. The mounting head 615 is used to connect to the horizontal support beam 3 or the vertical support beam 4.

[0036] One of the extension rods 612 of the upper diagonal brace 61 is connected to a tension reinforcement 7, which is connected to the central connector 52 via a tension steel wire to enhance the load-bearing performance of the upper diagonal brace 61.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A single-sided inclined pile bracing structure for foundation pit support, characterized in that, include: Multiple radial support plates (2) are laid out radially on the foundation pit support surface (1); Two transverse support beams (3) are respectively horizontally arranged on the upper and lower sides of the radial support plate (2); Multiple vertical support beams (4) are arranged at equal intervals along the longitudinal direction between the two transverse support beams (3); Multiple reinforcing rods (5), each of the reinforcing rods (5) being connected between two adjacent vertical support beams (4); The inclined pile bracing assembly (6) is located on one side of the upper transverse support beam (3) and vertical support beam (4) and extends obliquely to the bottom of the pit to support the radial support plate (2). The reinforcing rod (5) has a connector at its center, which is connected to the inclined pile support assembly (6) to provide auxiliary support for the inclined pile support assembly (6).

2. The inclined pile bracing structure for single-sided support of a foundation pit according to claim 1, characterized in that, The vertical support beam (4) is provided with end connectors (41) at both the upper and lower ends. The end connectors (41) are connected to the upper and lower horizontal support beams (3) so that the horizontal support beams (3) and the vertical support beams (4) together form a trapezoidal frame structure.

3. The inclined pile bracing structure for single-sided support of a foundation pit according to claim 1, characterized in that, The reinforcing rod (5) has side connectors (51) at both ends. The side connectors (51) are connected to the adjacent vertical support beam (4) so ​​that the vertical support beam (4) and the reinforcing rod (5) together form an I-shaped frame structure.

4. The inclined pile bracing structure for single-sided support of a foundation pit according to claim 1, characterized in that, The connector is a central connector (52), which is fixedly installed at the center of the reinforcing rod (5).

5. The inclined pile bracing structure for single-sided support of a foundation pit according to claim 1, characterized in that, The inclined pile support assembly (6) includes multiple upper inclined support members (61) and multiple lower inclined support members (62). The upper end of the upper inclined support member (61) is connected to the horizontal support beam (3) located above, and the upper end of the lower inclined support member (62) is connected to the corresponding vertical support beam (4). The lower ends of both extend and are anchored to the bottom of the foundation pit.

6. The inclined pile bracing structure for single-sided support of a foundation pit according to claim 5, characterized in that, The upper diagonal brace (61) and the lower diagonal brace (62) each include a base (611), at least one extension rod (612), a connector (613), a rotating part (614), a mounting head (615), and a rotating base (616).

7. The inclined pile bracing structure for single-sided support of a foundation pit according to claim 6, characterized in that, The base component (611) is fixed at the bottom of the pit. The rotating base (616) is rotatably connected to the base component (611). The rotating base (616) is connected to one end of the extension rod (612) through a flange. The extension rod (612) can be set in multiple groups. Adjacent extension rods (612) are connected in sequence through flanges. The uppermost extension rod (612) is connected to the connector (613) through a flange. The connector (613) is provided with a rotating component (614). The rotating component (614) is rotatably connected to the mounting head (615). The mounting head (615) is used to connect to the horizontal support beam (3) or the vertical support beam (4).

8. The inclined pile bracing structure for single-sided support of a foundation pit according to claim 5, characterized in that, One of the extension rods (612) of the upper diagonal brace (61) is connected to a tension reinforcement member (7), which is connected to the central connector (52) via a tension steel wire to enhance the load-bearing performance of the upper diagonal brace (61).

Images