CN214940183U - Steel-pipe pile diaphragm wall trades and props structure - Google Patents

Abstract

The utility model relates to a steel-pipe pile diaphragm wall trades and props structure in the excavation supporting engineering field, should trade and prop the structure and include steel-pipe pile diaphragm wall (1), underground structure beam slab (5), trade and prop beam slab (3), the resistance to compression is bent and is filled (2) four bibliographic categories branch, wherein steel-pipe pile diaphragm wall (1) is the underground continuous steel structure wall who possesses the fender soil stagnant water function that is formed by the major diameter steel-pipe pile through the hasp connection, trade and prop beam slab (3) and be located underground structure beam slab (5) and resistance to compression and bend and fill between (2), the resistance to compression is bent and is filled (2) and is located the steel-pipe pile and is traded and prop between beam slab (3), this trades the projection of propping the structure on the horizontal plane and has the hole that the interval was laid, the utility model provides a steel-pipe pile local pressure of buckling problem, the excavation backfilling of being convenient for, the recovery of steel-pipe pile diaphragm wall of being convenient for, the quality is reliable, and the cost is low, and the construction is quick.

Description

Steel-pipe pile diaphragm wall trades and props structure

Technical Field

The utility model relates to a steel-pipe pile diaphragm wall trades and props structure in the excavation supporting engineering field.

Background

The steel pipe pile continuous Wall (WSP) is a continuous steel structure wall body which adopts large-diameter steel pipe piles as a bearing structure and is formed by connecting adjacent steel pipe piles by using lock catches and has the functions of retaining soil and stopping water, and is mainly used in the field of foundation pit enclosure engineering. When the steel pipe pile continuous wall is used as a foundation pit enclosing structure, if the foundation pit is deeply dug, two or more horizontal inner supports need to be arranged, before the horizontal inner support at the bottom is removed, a foundation bottom plate is generally adopted as a support replacing structure, namely the foundation bottom plate is poured to the side surface of the steel pipe pile continuous wall, and when the foundation bottom plate has bearing capacity, the support at the bottom is removed. For the inner supports from the bottom to the top, before the supports are dismantled, the underground beam slab structure below the inner supports is generally used as the supports to be connected with the foundation pit soil retaining structure, and the horizontal load born by the inner supports is replaced, which is commonly called as support replacement. For foundation pit enclosing structures such as cast-in-place piles, underground continuous walls, SMW construction method piles and the like, reinforced concrete piles which are located on the same horizontal plane with a basement beam-slab structure are generally adopted as replacing supports. The main stress structure of the steel pipe pile continuous wall is a large-diameter thin-wall steel pipe pile, so that the problem of local buckling is easy to occur, and the steel pipe pile continuous wall is often required to be recycled, so that a proper support replacing structure is required to be designed, and the requirements of engineering safety, feasibility and steel pipe pile continuous wall recycling are met.

Disclosure of Invention

The utility model aims at providing a steel-pipe pile diaphragm wall trades props structure, should trade and prop the structure and include the steel-pipe pile diaphragm wall, underground structure beam slab, trade and prop the beam slab, the resistance to compression is bent and is filled four bibliographic categories branch, wherein the steel-pipe pile diaphragm wall is the underground continuous steel structure wall body who possesses fender soil stagnant water function that is formed by the major diameter steel-pipe pile through the hasp connection, it is the structure that will trade the load transmission for underground structure beam slab to trade to prop the beam slab, it is located underground structure beam slab and the resistance to compression and bends to fill to trade to prop the beam slab, the resistance to compression is bent to fill and is located the steel-pipe pile arc cylinder that fills the steel-pipe pile diaphragm wall between the steel-pipe pile and trade and props the part in space between the beam slab, and the steel-pipe pile diaphragm wall trades the projection of structure on the horizontal plane and has the hole that the interval was laid.

In the above-mentioned steel pipe pile continuous wall bracing structure, the above-mentioned buckling-resisting filling may be a prefabricated component.

In the above-mentioned steel pipe pile continuous wall support-changing structure, a thin film isolation layer may be provided between the steel pipe pile continuous wall and the compression-resistant filler.

The utility model discloses a steel-pipe pile diaphragm wall trades strut structure can combine together with major diameter thin wall steel-pipe pile foundation ditch retaining structure and use, has solved the local problem of buckling of steel-pipe pile, and the foundation ditch of being convenient for is backfilled, and the recovery of the steel-pipe pile diaphragm wall of being convenient for, the quality is reliable, and the cost is low, and the construction is quick.

Drawings

Fig. 1 is a schematic plan view of a support-changing structure of a continuous wall of a steel pipe pile according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a support-changing structure of a steel pipe pile continuous wall according to an embodiment of the present invention.

Detailed Description

As an embodiment of the present invention, the structure and the working principle of the steel pipe pile continuous wall support changing structure of the present invention are described below with reference to fig. 1 and 2. As shown in fig. 1 and 2, the support changing structure comprises a steel pipe pile continuous wall (1), an underground structural beam slab (5), a support changing beam slab (3) and a compression resistant filling (2), the steel pipe pile continuous wall (1) is an underground continuous steel structure wall body which is formed by connecting large-diameter steel pipe piles through lock catches and has a soil retaining and water stopping function, the support changing beam plate (3) is a structure which transmits support changing load to the underground structure beam plate (5), the support changing beam plate (3) is positioned between the underground structure beam plate (5) and the compression-resistant buckling filling (2), the compression-resistant buckling filling (2) is a part which is positioned between the steel pipe pile continuous wall (1) and the support changing beam plate (3) and fills a gap between a steel pipe pile arc-shaped cylindrical surface of the steel pipe pile continuous wall (1) and the support changing beam plate (3), and the projection of the support changing structure of the steel pipe pile continuous wall on the horizontal plane is provided with holes which are arranged at intervals. In the embodiment, the steel pipe pile continuous wall (1) is made of large-diameter steel pipe piles, the diameter is preferably selected from 0.6 to 3m, and the wall thickness is preferably selected from 6 to 40 mm. Because the steel pipe pile continuous wall (1) is large in diameter and thin in wall thickness, the problem of local buckling is easy to occur on the contact surface of the steel pipe pile continuous wall and the support replacing structure, the buckling-resisting treatment needs to be carried out in the design of the support replacing structure, and after the treatment is carried out by adopting the buckling-resisting filling (2) shown in figures 1 and 2, the problem of local buckling of the thin-wall structure can be effectively solved. In this embodiment, the support-replacing beam slab (3) can be of a reinforced concrete structure, and can be constructed synchronously with the basement outer wall (4) and the underground structure beam slab (5) during construction. In addition, in the embodiment, the support replacing structure of the steel pipe pile continuous wall is designed to have the porous structures arranged at intervals on the horizontal projection surface, that is, holes (6) arranged at intervals as shown in fig. 1 and fig. 2 are designed, so that the stress requirement of the support replacing structure is met, and the backfill soil can be filled in the gaps below the support replacing structure during the backfilling of the foundation pit, so that the backfilling requirement of the foundation pit is met. In the embodiment, the buckling-resistant filling (2) can be a prefabricated component, such as a prefabricated component made of reinforced concrete or steel reinforced concrete or a steel structure, and the main purpose is to solve the local buckling problem of the thin-wall structure through the buckling-resistant filling (2). In this embodiment, the buckling-resistant filling (2) may be plain concrete or cement mortar, dense sand, or the like. When the compression-resistant buckling filling (2) is plain concrete or cement mortar, in order to reduce the acting force between the support changing structure and the steel pipe pile continuous wall (1) during pile pulling, a thin film isolation layer can be arranged between the steel pipe pile continuous wall (1) and the compression-resistant buckling filling (2) so as to eliminate the condensation force between the compression-resistant buckling filling (2) and the steel pipe pile continuous wall (1). In this embodiment, when the basement outer wall (4) is arranged between the support beam plate (3) and the underground structure beam plate (5), the support beam plate (3) can be connected with the basement outer wall (4), and generally, the support beam plate (3) and the underground structure beam plate (5) are preferably arranged on the same horizontal plane so as to avoid generating large shearing force.

Claims (3)

1. A steel pipe pile continuous wall support changing structure is characterized by comprising four parts, namely a steel pipe pile continuous wall (1), an underground structure beam plate (5), a support changing beam plate (3) and compression resistant bending filling (2), the steel pipe pile continuous wall (1) is an underground continuous steel structure wall body which is formed by connecting large-diameter steel pipe piles through lock catches and has a soil retaining and water stopping function, the support changing beam plate (3) is a structure which transmits support changing load to the underground structure beam plate (5), the support changing beam plate (3) is positioned between the underground structure beam plate (5) and the compression-resistant buckling filling (2), the compression-resistant buckling filling (2) is a part which is positioned between the steel pipe piles and the support changing beam plate (3) and fills a gap between the steel pipe pile arc-shaped cylindrical surface of the steel pipe pile continuous wall (1) and the support changing beam plate (3), and the projection of the support changing structure of the steel pipe pile continuous wall on the horizontal plane is provided with holes which are arranged at intervals.

2. The steel pipe pile continuous wall bracing structure according to claim 1, wherein the buckling-resistant filling (2) is a prefabricated member.

3. The steel pipe pile continuous wall bracing structure according to claim 1, wherein a thin film isolation layer is arranged between the steel pipe pile continuous wall (1) and the compression-resistant filling (2).

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