Concrete-filled steel tube mixing composite pile supporting and isolating structure

Abstract

The utility model relates to a concrete-filled steel tube mixing composite pile supporting and isolating structure which comprises a plurality of rows of concrete-filled steel tube mixing composite piles, adjacent rows of concrete-filled steel tube mixing composite piles are meshed to form an integral structure, and each concrete-filled steel tube mixing composite pile comprises a peripheral mixing pile body and a core pile arranged in the mixing pile body. The core pile is of a steel pipe concrete structure. The utility model has the advantages that: 1) the rigidity is large and the horizontal resistance is strong: the core pile adopts the concrete filled steel tube, and the section rigidity of the core pile is larger than that of an SMW construction method pile under the same height size; 2) the machine tool is short and small, so that the construction is convenient: the machine tool of the concrete-filled steel tube mixing composite pile is very suitable for projects with narrow construction sites and low clearance, such as under bridges and adjacent existing buildings; and (3) the disturbance to the periphery is small: the concrete-filled steel tube mixing composite pile has small disturbance to the peripheral soil body, so that the concrete-filled steel tube mixing composite pile is very suitable for projects with high construction disturbance requirements such as adjacent pipelines and existing structures.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation engineering technology, and in particular to a steel pipe concrete mixing composite pile support and isolation structure. Background Technology

[0002] Currently, my country's foundation pit support engineering mainly uses bored piles, diaphragm walls, and SMW method piles, which are relatively expensive. Furthermore, the construction equipment is large, causing significant environmental disturbance. Similarly, isolation piles in my country are mostly bored piles and MJS piles, which are also costly, require large construction equipment, and have a significant impact on the surrounding environment. Summary of the Invention

[0003] The purpose of this utility model is to address the shortcomings of the prior art by providing a steel-concrete composite pile support and isolation structure. This structure employs double-row interlocking steel-concrete composite piles as foundation pit support piles or isolation piles. The steel-concrete composite piles are arranged alternately and interlocked. A reinforced concrete capping beam is installed at the top of the piles, and the capping beam is connected to the composite piles through a steel reinforcement cage inside the steel pipe. This improves the overall rigidity of the support piles and isolation piles, and can be widely applied in support and isolation projects in various construction sites with limited space, low clearance, proximity to existing structures, and sensitive surrounding environments.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A steel-concrete composite pile support and isolation structure is characterized in that it includes several rows of steel-concrete composite piles, with adjacent rows of steel-concrete composite piles interlocking to form an integral structure. The steel-concrete composite pile includes an outer mixing pile body and a core pile set inside the mixing pile body, wherein the core pile is a steel-concrete composite structure.

[0006] The steel-concrete composite pile is topped with a reinforced concrete cap beam.

[0007] The reinforced concrete cap beam is connected to the reinforcing cage inside the core pile of the steel-concrete composite pile.

[0008] The steel-concrete composite piles are installed in the foundation pit as support piles or isolation piles.

[0009] The advantages of this utility model are:

[0010] 1) High stiffness and strong resistance to horizontal movement: The core pile is made of steel pipe concrete, and its core pile section stiffness is greater than that of the SMW method pile under the same height dimensions.

[0011] 2) The equipment is small and easy to construct: Because the equipment for steel pipe concrete mixing composite piles is small, it is very suitable for projects with small construction sites and low clearance, such as under bridges or adjacent existing structures.

[0012] 3) Minimal disturbance to surrounding areas: Because steel-concrete composite piles cause minimal disturbance to the surrounding soil, they are ideal for projects with high requirements for construction disturbance, such as those near pipelines or existing structures. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model applied in a foundation pit;

[0014] Figure 2 This is a schematic diagram of the structure in which the present invention is applied to the protection of underground structures;

[0015] Figure 3 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0016] The features of this utility model and other related features will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0017] like Figure 1-3 As shown in the figure, the marks 1-6 represent: 1. Steel pipe concrete mixing composite pile, 2. Reinforced concrete cap beam, 3. Existing bridge, 4. Underground structure, 5. Mixing pile body, and 6. Core pile.

[0018] Example: Figures 1 to 3 As shown, in this embodiment, the steel-concrete mixing composite pile support and isolation structure includes several steel-concrete mixing composite piles 1 arranged in rows. Each steel-concrete mixing composite pile 1 is arranged along its layout position, and the outer mixing pile bodies 5 of two adjacent rows of steel-concrete mixing composite piles 1 form an interlocking structure, thereby connecting several steel-concrete mixing composite piles 1 to form an integral structure.

[0019] Specifically, the steel-concrete composite pile 1 in this embodiment includes a mixing pile body 5 and a core pile 6 inside it. The core pile 6 adopts a steel-concrete composite structure, and its moment of inertia is significantly higher than that of the SMW method pile at the same structural height. In this embodiment, the core pile 6 has a specific structure consisting of a steel pipe inserted into the mixing pile body 5 and concrete poured inside the steel pipe.

[0020] A reinforced concrete cap beam 2 is installed on the top of the steel-concrete composite pile 1. The reinforced concrete cap beam 2 is connected to the steel cage installed on the top of the core pile 6, so that the reinforced concrete cap beam 2 and the steel-concrete composite pile 1 are connected to form an integral structure, which further improves the overall rigidity of the support pile and the isolation pile.

[0021] Meanwhile, the steel-concrete composite pile 1 in this embodiment has relatively small construction equipment, which can be used for construction under harsh conditions, such as under existing bridges or adjacent existing buildings, and causes little disturbance to the surrounding soil, making it suitable for projects near existing structures.

[0022] For example, such as Figure 1 As shown, in this embodiment, the steel-concrete composite pile 1 is set at the boundary of the foundation pit, serving as a support pile for the pit. For example... Figure 2 As shown, in this embodiment, the steel-concrete composite pile 1 is installed under the existing bridge 3 to act as an isolation pile to isolate the stress of the underground structure 4 already buried under the bridge during excavation.

[0023] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A steel-concrete composite pile support and isolation structure, characterized in that: It includes several rows of steel-concrete composite piles, with adjacent rows of steel-concrete composite piles interlocking to form an integral structure. The steel-concrete composite pile includes an outer mixing pile body and a core pile set inside the mixing pile body. The core pile is a steel-concrete structure. The top of the steel-concrete composite mixing pile is provided with a reinforced concrete cap beam. The reinforced concrete cap beam is connected to the reinforcing cage inside the core pile of the steel-concrete composite pile.

2. The steel-concrete composite pile support and isolation structure according to claim 1, characterized in that: The steel-concrete composite piles are installed in the foundation pit as support piles or isolation piles.

Images