Long and narrow foundation pit supporting structure

Abstract

The utility model relates to the field of supporting structures, and discloses a long and narrow foundation pit supporting structure which comprises a plurality of supporting units, each supporting unit comprises a connecting part and at least one set of baffle part, each baffle part comprises two oppositely-arranged baffles, a plurality of anchor rods are arranged on the baffles, the anchor rods penetrate through the baffles, and the ends of the anchor rods can be fixed to the baffles. The two ends of the supporting pieces are connected with the two baffles of the baffle part respectively, and the locking rod part is used for being connected with the supporting pieces. The long and narrow supporting structure is stable in supporting and high in supporting installation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of support structures, specifically to a support structure for narrow and long foundation pits. Background Technology

[0002] In the field of foundation pit engineering, the support of narrow and elongated foundation pits is a crucial task. Narrow and elongated deep foundation pits are a special type of foundation pit, characterized by their large length but narrow width. The excavation and support work for these pits is relatively complex, requiring consideration of various factors such as soil stability and groundwater level changes. In existing technologies, traditional pile-anchor support systems are commonly used for narrow and elongated foundation pits. During construction, drilling of cast-in-place piles is required first. However, due to the narrow space of narrow and elongated foundation pits, the operation of large drilling equipment is limited, leading to high construction difficulty and low drilling efficiency. Furthermore, under complex geological conditions, the verticality of the cast-in-place piles is difficult to guarantee, thus affecting the stability of the overall support structure. Patent CN221800859U discloses a heating pipeline support mechanism that, as a support structure, lacks a reinforced connection with the soil layer, failing to increase soil stability and resulting in poor support effectiveness. Overall, existing anchor pile support methods suffer from poor stability and low installation efficiency in the support of narrow and elongated foundation pits. Utility Model Content

[0003] The present invention aims to provide a support structure for narrow and elongated foundation pits, so as to provide a support structure that is stable and has high installation efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a narrow and elongated foundation pit support structure, comprising several support units, each support unit comprising a connecting part and at least one set of baffle parts, each baffle part comprising two opposing baffles, each baffle being provided with several anchor rods passing through the baffles and whose ends can be fixed to the baffles, the connecting part comprising several support members whose two ends are respectively connected to the two baffles of the baffle part, and a locking rod part for connecting the support members.

[0005] The beneficial effects of this plan are:

[0006] This technical solution employs several support units, each consisting of a baffle section and a connecting section. When supporting narrow, elongated foundation pits, baffles are installed one by one along the pit wall. Anchor bolts are then installed sequentially on the baffles, with the ends of the anchor bolts extending into the soil layers on both sides of the pit. This deep anchoring reduces soil displacement and deformation on both sides of the pit, effectively suppressing soil loosening. Simultaneously, the anchor bolts provide reinforcement, eliminating the need for large-scale pile foundations and making the solution suitable for various construction environments. Furthermore, support members are provided between the baffles to prevent them from collapsing under soil forces, ensuring a relative distance between opposing baffles during construction and enhancing the stability of the support structure. This makes it suitable for complex geological conditions. A locking rod section is also included for connecting the support members, further improving the structural stability of the support unit.

[0007] In this technical solution, each unit and component is independent and standardized, which facilitates factory prefabrication and rapid on-site assembly. It adapts to the limitations of narrow foundation pit construction space. By combining multiple support units, the support system can be flexibly adjusted according to the length and shape of the foundation pit to meet the needs of different construction sites and improve construction efficiency.

[0008] Preferably, as an improvement, the support includes a support rod, at least one support arm is fixedly provided at both ends of the support rod, and the baffle is provided with an array of supports for connecting to the ends of the support arms.

[0009] The beneficial effects are as follows: by setting supports on the baffle, the ends of the support arms can be quickly connected and fixed, simplifying the installation operation and improving construction efficiency. By setting support arms and supports to connect, the support unit forms a rigid frame, which improves the structural stability of the support unit.

[0010] Preferably, as an improvement, each end of the support rod is provided with two support arms of different lengths. The shorter support arm is connected to the upper part of the baffle, and the longer support arm is connected to the lower part of the baffle.

[0011] The beneficial effects are as follows: the support rod is connected to the baffle through two support arms at both ends, which transmits the support force to multiple support points of the baffle, effectively dispersing the soil pressure and avoiding local instability caused by concentrated force. At the same time, the support rod is equipped with two support arms at both ends, which can realize the support of multiple positions of the baffle by one rod. Moreover, the two support arms are of different lengths. The shorter support arm is connected to the upper part of the baffle, and the longer support arm is connected to the lower part of the baffle. The absence of a middle obstruction leaves a passage for walking, making the cross-section of the support member inverted U-shape. This makes it convenient for construction personnel to walk along the bottom of the foundation pit to operate other construction processes in the foundation pit, as well as to carry out daily inspection and maintenance of the support system.

[0012] Preferably, as an improvement, it also includes a connector, wherein the ends of the support arm away from the support rod are all connected to the support for limiting via the connector.

[0013] The beneficial effects are: by using connectors to limit and fix the end of the support arm to the support, the displacement of the support arm due to soil pressure or construction disturbance is effectively avoided, ensuring the stability of the support structure and improving the overall support effect.

[0014] Preferably, as an improvement, the connector is a circular shaft, which passes through the support and the end of the support arm for limiting.

[0015] Preferably, as an improvement, each support unit is provided with at least three support members.

[0016] The beneficial effects are: the three support members are evenly distributed between the baffles, which can effectively disperse the soil pressure borne by the baffles, reduce the stress load on individual support members, and improve the compressive strength of the system.

[0017] Preferably, as an improvement, the locking rod includes a locking rod and a pin. The locking rod is provided with multiple locking grooves, each of which can engage with the support member. Both the locking grooves and the support member are provided with locking holes through which the pin passes.

[0018] The beneficial effects are as follows: the pins firmly connect the locking rod and the support through the locking holes, forming a stable snap-fit ​​structure, which effectively prevents loosening caused by vibration or external force during construction. By setting the locking rod to connect multiple support components, a longitudinal and transverse support structure is formed. The baffle evenly distributes the soil pressure, and the support components effectively resist lateral pressure. Even under harsh working conditions, the foundation pit can be kept stable. According to actual engineering monitoring, the deformation of this support structure is much smaller than that of the traditional method, which ensures construction safety and helps to reduce accident risks and maintenance costs.

[0019] Preferably, as an improvement, the pin is a single, integral piece.

[0020] Preferably, as an improvement, the pin cross-section is rectangular.

[0021] The beneficial effects are: compared with round pins, rectangular pins provide a larger shear area on the wider side, can withstand higher shear forces, and improve the deformation resistance of the support unit.

[0022] Preferably, as an improvement, the ends of the anchor rods are provided with anchors that can engage with the baffle, and the ends of the anchor rods are fixed to the anchors. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the support unit structure according to an embodiment of the present utility model;

[0024] Figure 2 This is a side view of the support unit according to an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the locking rod portion in an embodiment of the present invention.

[0026] The reference numerals in the accompanying drawings include: baffle 1, anchor rod 2, support rod 3, support arm 4, support 5, locking rod 6, locking groove 7, pin 8, rotating shaft 9, and anchor 10. Detailed Implementation

[0027] The following detailed description is provided through specific implementation methods and examples:

[0028] The preferred embodiments of this utility model are basically as shown in the appendix. Figure 1-2 As shown, Figure 1 and Figure 2 The elongated foundation pit support structure shown includes several support units. Each support unit includes a connecting part and at least one set of baffle parts. Each baffle part includes two opposing baffles 1. Each baffle 1 is provided with several anchor rods 2 that pass through the baffle 1 and whose ends can be fixed to the baffle 1. The fixing of the ends of the anchor rods 2 to the baffles 1 can take various forms, such as snap-fitting and welding. In order to make the structure simple, reliable and easy to assemble, the preferred embodiment of this utility model is to provide anchors 10 that can snap-fit ​​to the baffles 1 at the ends of the anchor rods 2. The anchors 10 are fixed to the anchor rods 2. The connecting part includes several support members whose two ends abut against the two baffles 1 of the baffle part and a locking rod part for connecting the support members.

[0029] This technical solution involves setting up several support units, each consisting of a baffle plate and a connecting part. When supporting a narrow, elongated foundation pit, baffle plates 1 are installed one by one along the pit wall. Anchor bolts 2 are then installed sequentially on the baffle plates 1. The ends of the anchor bolts 2 furthest from the baffle plates 1 penetrate into the soil layers on both sides of the pit. By setting the anchor bolts 2 deep into the soil layers, displacement and deformation of the soil on both sides of the pit are reduced, effectively suppressing soil loosening. Simultaneously, reinforcement is achieved through the anchor bolts 2, eliminating the need for large equipment for cast-in-place piles. This solution is suitable for various construction environments. Furthermore, support members are provided between the baffle plates 1 to support them, preventing the baffle plates 1 from collapsing under soil forces and ensuring that relative distance is maintained between opposing baffle plates 1 during construction. This enhances the stability of the support structure and is suitable for complex geological conditions. A locking rod part is also provided for connecting the support members, further improving the structural stability of the support unit.

[0030] In this technical solution, each unit and component is independent and standardized, which facilitates factory prefabrication and rapid on-site assembly with the assistance of cranes. It adapts to the limitations of narrow foundation pit construction space. By combining multiple support units, the support system can be flexibly adjusted according to the length and shape of the foundation pit to meet the needs of different construction sites and improve construction efficiency.

[0031] To ensure a simple, reliable, and easy-to-assemble structure, the preferred embodiment of this invention includes a support rod 3 with at least one support arm 4 fixedly attached to both ends. The baffle 1 is arrayed with supports 5 for connecting to the ends of the support arms 4. By connecting the support arms 4 and the supports 5, the support unit forms a rigid frame, improving its structural stability. Simultaneously, the supports 5 allow for quick docking and fixing of the ends of the support arms 4, simplifying installation and improving construction efficiency. To further ensure a simple, reliable, and easy-to-assemble structure, the preferred embodiment of this invention is as follows: Figure 2 As shown, each end of the support rod 3 is equipped with two support arms 4. The two support arms 4 have different lengths. The shorter support arm 4 is connected to the upper part of the baffle, and the longer support arm 4 is connected to the lower part of the baffle. The support arms 4 and the support rod 3 are both obtuse angles, making the overall cross-section of the support member inverted U-shape. The support rod is connected to the baffle 1 through the two support arms 4 at both ends, which transmits the support force to multiple support points 5 of the baffle 1, effectively dispersing the soil pressure and avoiding local instability caused by concentrated force. At the same time, the support rod 3 is equipped with two support arms 4 at both ends, which can realize that one rod can support multiple positions of the baffle 1. The obtuse angle between the support arms 4 and the support rod 3 makes the cross-section of the support member inverted U-shape, which eliminates the obstruction in the middle and leaves a walking passage, which makes it convenient for construction personnel to walk along the bottom of the foundation pit to operate other construction links in the foundation pit, as well as for daily inspection and maintenance of the support system.

[0032] It also includes connectors. The ends of the support arm 4 furthest from the support rod 3 are connected to the support 5 through connectors. The connectors fix the ends of the support arm 4 to the support 5, effectively preventing the support arm 4 from shifting due to soil pressure or construction disturbance, ensuring the stability of the support structure and improving the overall support effect. The connectors can be of various forms, such as pin type, snap type or bolt fixing. For easy on-site installation and adjustment, the connector in this utility model is a circular rotating shaft 9. The circular rotating shaft 9 passes through the support 5 and the end of the support arm 4 for connection. When the soil layer vibrates, the connection point can rotate slightly relative to the support 5 compared to the fixed connection and then reset under the elastic force of the support rod 3. This avoids the end of the support arm 4 breaking directly at the connection point when subjected to large lateral forces, thus improving the stability of the structure.

[0033] To ensure structural stability, the preferred embodiment of this invention is that each support unit is provided with at least three support members, which are evenly distributed between the baffles 1. This can effectively disperse the soil pressure borne by the baffles 1, reduce the stress load on individual support members, and improve the system's compressive strength.

[0034] To ensure a simple, reliable structure and ease of assembly, the preferred embodiment of this invention is as follows: Figure 3As shown, the locking rod part includes a locking rod 6 and a pin 8. The locking rod 6 is provided with multiple locking grooves 7, each of which can engage with the support rod 3. Both the locking grooves 7 and the support rod 3 are provided with locking holes through which the pin 8 passes. The pin 8 securely connects the locking rod 6 and the support rod 3 through the locking holes, forming a stable engagement structure. This effectively prevents loosening caused by vibration or external force during construction. By setting up the locking rod part to connect multiple support rods 3, a longitudinal and transverse support structure is formed. The baffle 1 evenly distributes the soil pressure, and the support member effectively resists lateral pressure. The pin 8 has a rectangular cross-section and is a single piece. Compared with a circular pin 8, the rectangular pin 8 provides a larger shear area on its wider side, which can withstand higher shear forces and improve the deformation resistance of the support unit.

[0035] To ensure a simple, reliable, and easy-to-assemble structure, the preferred embodiment of this utility model further includes a hydraulic telescopic mechanism. The support rod 3 is divided into two sections, and the two ends of the support rod 3 are connected by the hydraulic telescopic mechanism to improve the applicability of the support device. Especially in the construction of narrow and long foundation pits of different widths, the length of the support 4 can be adjusted quickly without replacing components, effectively dispersing the soil pressure on the baffle.

[0036] To ensure a simple, reliable, and easy-to-assemble structure, the preferred embodiment of this invention further includes a ladder. A collar is fixed to the end of the ladder 12, and a sliding hole is provided on the collar for the pin 8 to slide into. After the pin 8 is slidably inserted, the collar is fixed to the support member 3.

[0037] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A long and narrow foundation pit support structure, comprising several support units, characterized in that: Each support unit includes a connecting part and at least one set of baffle parts. Each baffle part includes two baffles (1) arranged opposite to each other. Each baffle (1) is provided with several anchor rods (2) that pass through the baffle (1) and whose ends can be fixed to the baffle (1). The connecting part includes several support members that are connected to the two baffles (1) of the baffle part at both ends, and a locking rod part for connecting the support members.

2. The narrow foundation pit support structure according to claim 1, characterized in that: The support includes a support rod (3), at least one support arm (4) is fixedly provided at both ends of the support rod (3), and the baffle (1) is provided with an array of supports (5) for connecting to the ends of the support arms (4).

3. The narrow foundation pit support structure according to claim 2, characterized in that: The support rod (3) has two support arms (4) at both ends. The two support arms (4) have different lengths. The shorter support arm (4) is connected to the upper part of the baffle, and the longer support arm (4) is connected to the lower part of the baffle.

4. The narrow foundation pit support structure according to claim 2, characterized in that: It also includes connectors, and the ends of the support arm (4) away from the support rod (3) are all limited to the support (5) through connectors.

5. The narrow foundation pit support structure according to claim 4, characterized in that: The connecting component is a circular shaft (9), which passes through the support (5) and the end of the support arm (4) for limiting.

6. The narrow foundation pit support structure according to claim 1, characterized in that: Each support unit is equipped with at least three support members.

7. The narrow foundation pit support structure according to claim 1, characterized in that: The locking rod includes a locking rod (6) and a pin (8). The locking rod (6) is provided with multiple locking grooves (7) that can be engaged with the support member. Both the locking grooves (7) and the support member are provided with locking holes through which the pin (8) passes.

8. The narrow foundation pit support structure according to claim 7, characterized in that: The pin (8) is a single piece.

9. The narrow foundation pit support structure according to claim 7, characterized in that: The cross-section of the pin (8) is rectangular.

10. The narrow foundation pit support structure according to claim 1, characterized in that: The ends of the anchor rods (2) are provided with anchors (10) that can be engaged with the baffle (1), and the ends of the anchor rods (2) are fixed to the anchors (10).

Images