A foundation pit pile-anchor combined supporting structure

Abstract

The utility model relates to a kind of foundation pit pile anchor combined support structure. It includes several vertical closed loop distribution's support pile, the spacing between adjacent support pile is 2 to 3 meters, two vertical grooves are provided on each support pile, the groove is opposite its adjacent support pile, and the groove of two opposite on two adjacent support piles is inserted with several up-and-down stacked rigid fender, the support structure further includes crown beam fixedly connected to the top of all support piles, and the vertical projection area of the crown beam avoids all grooves. Compared with the conventional row pile support scheme, the use amount of support pile is only about 1 / 2, so the use amount of reinforcing steel can be significantly reduced, the construction time of support pile can also be greatly reduced, the construction cost can be significantly reduced and the construction speed can be improved.

Description

Technical Field

[0001] This utility model relates to a support structure, and more particularly to a foundation pit pile-anchor combined support structure. Background Technology

[0002] In building construction, foundation pits are often excavated for laying pile foundations, constructing basements, or laying underground pipelines. Foundation pits are also required in various underground engineering projects. During the excavation process, support work is necessary to prevent the foundation pit from collapsing. Existing foundation pit pile-anchor combined support structures generally employ methods such as pile support, pile bracing, pile anchors, pile cantilever, diaphragm wall support, cement retaining walls, soil nailing walls, and shotcrete support. These diverse support structures require a large amount of concrete and steel structural components. However, after the foundation pit construction is completed, these steel structural components often extend into the foundation pit soil and cannot be removed for reuse, resulting in a significant waste of steel resources. Utility Model Content

[0003] This utility model provides a foundation pit pile-anchor combined support structure; it solves the problem of resource waste caused by the fact that most of the steel in the existing support structures cannot be reused.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a foundation pit pile-anchor combined support structure, including a number of support piles distributed in a vertical closed loop, the spacing between adjacent support piles is 2 to 3 meters, each support pile is provided with two vertical slots, the slots are directly opposite the adjacent support piles, and a number of rigid protective plates stacked vertically are inserted between the two directly opposite slots on two adjacent support piles. The support structure also includes a cap beam fixedly connected to the top of all the support piles, the vertical projection area of ​​the cap beam avoids all slots, and the cap beam connects the top of the support piles into an integral frame by reinforced concrete pouring, forming a portal frame structure, which effectively disperses horizontal loads and enhances the rigidity and deformation control capability of the support system.

[0005] In existing pile support systems, the spacing (not the center-to-center distance) of the support piles is generally 1 to 2 times the pile diameter, with a typical pile diameter of around 800 mm. Therefore, the spacing of support piles in pile support systems is generally within 1.5 meters. In this invention, both the support piles and the capping beam are one-time cast-in-place structures and cannot be reused. However, the spacing between the support piles in this invention is 2 to 3 meters. Therefore, for the same scale of foundation pit, this invention uses only about half the number of support piles compared to existing conventional pile support schemes, thus significantly reducing the amount of steel reinforcement required. Furthermore, the actual construction of support piles requires multiple procedures, with drilling consuming a significant amount of time and cost. Therefore, using this invention can greatly reduce the construction time of the support piles, significantly reduce construction costs, and increase construction speed.

[0006] This invention involves creating two vertical slots in the support pile, and then inserting several rigid protective plates stacked vertically between two adjacent slots. The rigid protective plates provide protection. Furthermore, because the rigid protective plates engage with the slots through a sliding and inserting mechanism, they are removable and reusable.

[0007] Furthermore, the support pile is composed of concrete, a reinforcing cage, and two grooves, with the openings of the grooves facing outwards, and the slots formed within the grooves. The grooves can be made of metal profiles or engineering plastics, and their function is to form uniformly sized slots on the support pile.

[0008] Therefore, this utility model has the following characteristics compared with the prior art: 1. Compared with the existing conventional pile support scheme, the amount of support piles used in this utility model is only about 1 / 2, which can significantly reduce the amount of steel bars used, and can also greatly reduce the construction time of support piles, thus significantly reducing construction costs and increasing construction speed. Attached Figure Description

[0009] Appendix Figure 1 This is a schematic diagram of a structure of this utility model after omitting the crown beam; Appendix Figure 2 This is a top view of the present invention; Appendix Figure 3 This is a structural schematic diagram of the rigid guard plate; Appendix Figure 4 This is a partial connection view of the retaining piles and the rigid retaining plate; Appendix Figure 5 This is a schematic diagram of the slotted structure; Appendix Figure 6 This is a structural diagram of the cable tray and the structural support block. Detailed Implementation

[0010] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0011] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0012] Example 1: See Figure 1 , Figure 2 A pile-anchor combined support structure for foundation pits includes several support piles 100 arranged in a vertical closed loop. The spacing between adjacent support piles is 2 to 3 meters. Each support pile has two vertical slots 110, which are aligned with the adjacent support piles. Several rigid protective plates 200 stacked vertically are inserted between the two aligned slots on two adjacent support piles. The support structure also includes a capping beam 300 fixedly connected to the top of all support piles. The vertical projection area of ​​the capping beam avoids all slots. The capping beam connects the top of the support piles into an integral frame by reinforced concrete pouring, forming a portal frame structure, which effectively disperses horizontal loads and enhances the rigidity and deformation control capability of the support system.

[0013] In existing pile support systems, the spacing between support piles is typically 1 to 2 times the pile diameter, with a standard pile diameter of around 800mm. Therefore, the spacing between support piles in pile support systems is generally within 1.5 meters. In this embodiment, both the support piles and the capping beam are one-time cast-in-place structures and cannot be reused. However, the spacing between the support piles in this embodiment is 2 to 3 meters. Therefore, for the same size foundation pit, this embodiment uses only about half the number of support piles compared to existing conventional pile support schemes, thus significantly reducing the amount of steel reinforcement required. Furthermore, the actual construction of support piles requires multiple procedures, with drilling consuming a significant amount of time and cost. Therefore, adopting this embodiment can greatly reduce the construction time of the support piles, significantly reducing construction costs and increasing construction speed.

[0014] In this embodiment, two vertical slots are made in the support piles, and then several rigid protective plates stacked vertically are inserted between two adjacent slots. The vertical width of the rigid protective plates is about 0.5 meters, and the rigid protective plates serve a protective function. Furthermore, since the rigid protective plates engage with the slots by sliding up and down, they are removable and reusable.

[0015] See Figure 5The retaining pile consists of concrete, a reinforcing cage, and two 120mm grooves. The openings of the grooves face outwards, and the slots are formed within them. The grooves can be made of metal profiles or engineering plastics, and their function is to create uniformly sized slots on the retaining pile.

[0016] For details, see Figure 5 The cable trays are made of engineering plastics, resulting in lower production costs; see Figure 5 The slot is divided into a circular area 10 and an open area 20. The width of the open area is between 0.5 and 0.8 of the diameter of the circular area. The rigid guard plate has round rods 210 at both ends that are adapted to the circular area.

[0017] See Figure 3 and Figure 4 The rigid guard plate consists of a guard plate 220, a reinforcing frame 230, and two round rods 210. Two sliding rods 240 are vertically fixed on the round rods, and the sliding rods are in sliding fit with the guard plate. The guard plate is provided with a plug-in sleeve 221 that slides with the sliding rods. A weight-reducing window 250 is opened in the central area of ​​the guard plate, and a steel mesh 260 is covered on the weight-reducing window. Due to the limitation of construction accuracy, there is a certain deviation between the actual distance of any two adjacent slots and the design distance. Through the above solution, the total width of the two round rods can be freely extended and retracted within a certain range to adapt to the actual distance between the two slots.

[0018] See Figure 2 The capping beam consists of a closed-loop beam body 310 and several connecting beams 320 fixed inside the closed-loop beam body. The number of connecting beams corresponds one-to-one with the support piles and is fixedly connected to the top of the support piles.

[0019] The construction scheme of this embodiment: The construction process of the support piles is basically the same as the existing method. The difference is that before pouring concrete, the wire groove needs to be fixed on the steel cage first, and then the concrete is poured. The outer diameter of the support piles is 750mm or more. In order to avoid deformation of the wire groove caused by the pressure of the concrete during the pouring process, several plastic structural support blocks 30 (see...) can be inserted into the wire groove in advance. Figure 6 ( ), used to maintain its normal shape; after all the support piles have been completely cured, the cap beam is poured; then the rigid guard plate is installed simultaneously during the excavation of the foundation pit, and the structural support block in the slot needs to be destroyed and removed before installation.

[0020] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. A pile-anchor combined support structure for foundation pits, comprising a plurality of support piles arranged in a vertical closed loop, characterized in that: The spacing between adjacent support piles is 2 to 3 meters. Each support pile has two vertical slots, which are aligned with the adjacent support pile. Several rigid protective plates stacked one on top of the other are inserted between the two aligned slots on two adjacent support piles. The support structure also includes a cap beam fixedly connected to the top of all the support piles. The vertical projection area of ​​the cap beam avoids all slots.

2. The foundation pit pile-anchor combined support structure according to claim 1, characterized in that: The support pile consists of concrete, a steel cage, and two grooves. The openings of the grooves are distributed outwards, and the slots are formed inside the grooves.

3. The foundation pit pile-anchor combined support structure according to claim 2, characterized in that: The slot is divided into a circular area and an open area. The width of the open area is between 0.5 and 0.8 times the diameter of the circular area. The rigid guard plate has round rods at both ends that are adapted to the circular area.

4. The foundation pit pile-anchor combined support structure according to claim 3, characterized in that: The rigid guard plate consists of a guard plate, a reinforcing frame, and two round rods. Two sliding rods are vertically fixed on the round rods, and the sliding rods are in sliding fit with the guard plate. A weight-reducing window is opened in the central area of ​​the guard plate, and the weight-reducing window is covered with a steel mesh.

5. The foundation pit pile-anchor combined support structure according to claim 1, characterized in that: The capping beam consists of a closed-loop beam body and several connecting beams fixed to the inside of the closed-loop beam body. The number of connecting beams corresponds one-to-one with the support piles and is fixedly connected to the top of the support piles.

6. The foundation pit pile-anchor combined support structure according to claim 5, characterized in that: The outer diameter of all the support piles is 750mm or more.

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