CN110258529B

CN110258529B - Post-tensioned prestressed underground continuous wall and construction method thereof

Info

Publication number: CN110258529B
Application number: CN201910482610.2A
Authority: CN
Inventors: 马红亮; 王欢
Original assignee: Xinlongye Construction Engineering Co ltd
Current assignee: Xinlongye Construction Engineering Co ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2021-08-17
Anticipated expiration: 2039-06-04
Also published as: CN110258529A

Abstract

The invention discloses a post-tensioned prestressed underground continuous wall which comprises a continuous wall main body, wherein two sides of an inner cavity of the continuous wall main body are provided with fore shaft pipe joints, a reinforcement cage is arranged inside the continuous wall main body, two ends of the continuous wall main body are provided with closed end wall plates, and the back side of the continuous wall main body is provided with a traction rod. The back side of the continuous wall main body is provided with the rear tension traction wallboard, the rear tension traction wallboard and the continuous wall main body are pulled through the elastic traction rod, backward prestress can be applied to the continuous wall through the rear tension traction wallboard, the two ends of the continuous wall main body are provided with the closed end wallboards, the traction frame of an S-shaped structure is arranged between the closed end wallboards and the continuous wall main body, backward prestress can be generated on the continuous wall main body through the traction frame, the compression resistance of the continuous wall main body is improved through the design, the structural damage caused by overpressure is avoided, and the service life of the continuous wall main body is prolonged.

Description

Post-tensioned prestressed underground continuous wall and construction method thereof

Technical Field

The invention relates to the field of underground continuous walls, in particular to a post-tensioned prestressed underground continuous wall.

Background

The prestress is to improve the performance of the structure during use, the pressure is applied to the structure in advance during construction, the prestress of the structure during use can totally or partially offset the tensile stress caused by load, the structural damage is avoided, the underground continuous wall is a foundation engineering, a grooving machine is adopted on the ground, a long and narrow deep groove is excavated along the peripheral axis of the deep excavation engineering under the condition of slurry wall protection, after the groove is cleaned, a reinforcement cage is hung in the groove, then underwater concrete is poured by a conduit method to form a unit groove section, and the process is carried out section by section, so that a continuous reinforced concrete wall is built underground to serve as a structure for intercepting water, preventing seepage, bearing and retaining water.

The underground continuous wall at the present stage has various disadvantages, such as short service life, poor pressure resistance and easy damage of the structure.

Disclosure of Invention

The invention aims to provide a post-tensioned prestressed underground continuous wall, which solves the problems of short service life, poor pressure resistance and easy structure damage in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a post-tensioned prestressing underground continuous wall, includes the continuous wall main part, the inner chamber both sides of continuous wall main part are provided with fore shaft coupling, the internally mounted of continuous wall main part has the steel reinforcement cage, the blind end wallboard is installed at the both ends of continuous wall main part, the traction lever is installed to the dorsal part of continuous wall main part, the one end of traction lever is installed the post-tensioned traction wallboard.

Preferably, the continuous wall main body, the closed end wall plate and the rear tension traction wall plate are of a connected structure, and hollow cavities are arranged in the two ends of the continuous wall main body, the closed end wall plate and the rear tension traction wall plate.

Preferably, a traction frame is arranged inside the hollow cavity, and screw heads are arranged at two ends of the traction frame.

Preferably, the traction frame is provided with a plurality of traction frames, the traction frames are of S-shaped structures, and two ends of the traction frames are respectively installed at the back side of the continuous wall main body and one end of the inner side of the closed end wall plate through screw heads.

Preferably, the draw bar is arranged to be an elastic structure, and the installation state of the draw bar is an elastic stretching state.

Compared with the prior art, the invention has the beneficial effects that: the back side of the continuous wall main body is provided with the rear tension traction wallboard, the rear tension traction wallboard and the continuous wall main body are pulled through the elastic traction rod, backward prestress can be applied to the continuous wall through the rear tension traction wallboard, the two ends of the continuous wall main body are provided with the closed end wallboards, the traction frame of an S-shaped structure is arranged between the closed end wallboards and the continuous wall main body, backward prestress can be generated on the continuous wall main body through the traction frame, the compression resistance of the continuous wall main body is improved through the design, the structural damage caused by overpressure is avoided, and the service life of the continuous wall main body is prolonged.

Drawings

FIG. 1 is a top view of the present invention.

Fig. 2 is a front view of the diaphragm wall body of the present invention.

Fig. 3 is a schematic structural diagram of the traction frame of the present invention.

In the figure: 1. closing the end wall panel; 2. a hollow cavity; 3. a traction frame; 4. a back tension traction wallboard; 5. a draw bar; 6. a diaphragm wall main body; 7. a fore shaft pipe joint; 8. a reinforcement cage; 9. a screw head.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, in the embodiment of the present invention, a post-tensioned prestressed underground diaphragm wall includes a diaphragm wall body 6, wherein two sides of an inner cavity of the diaphragm wall body 6 are provided with a fore shaft pipe joint 7, the fore shaft pipe joint 7 facilitates splicing and combining of wall boards, the diaphragm wall body 6, a closed end wall board 1 and a post-tensioned wall board 4 are configured as a connected structure, the post-tensioned wall board 4 can pull the diaphragm wall body 6 backwards through a traction rod 5 to generate backward prestress, hollow cavities 2 are disposed inside two ends of the diaphragm wall body 6, the closed end wall board 1 and the post-tensioned wall board 4, the hollow cavities 2 facilitate installation of traction frames 3, traction frames 3 are mounted inside the hollow cavities 2, the traction frames 3 can generate backward prestress on a back of the diaphragm wall body 6, a plurality of traction frames 3 are provided, and the plurality of traction frames 3 form an S-shaped structure, and the two ends of a plurality of traction frames 3 are respectively installed at the back side of the continuous wall main body 6 and one end of the inner side of the closed end wall plate 1 through screw heads 9, the screw heads 9 are convenient for the installation and the disassembly of the traction frames 3 through the screw heads 9, the screw heads 9 are installed at the two ends of the traction frames 3, the traction rod 5 is of an elastic structure, the installation state of the traction rod 5 is an elastic stretching state, a reinforcement cage 8 is installed inside the continuous wall main body 6, the reinforcement cage 8 is a framework of the continuous wall main body 6 and used for supporting the continuous wall main body 6, the closed end wall plate 1 is installed at the two ends of the continuous wall main body 6, the closed end wall plate 1 is convenient for the installation of the traction frames 3, the traction rod 5 is installed at the back side of the continuous wall main body 6, and the rear tension traction wall plate 4 is installed at one end of the traction rod 5.

The working principle of the invention is as follows: when the device is used, a continuous wall body 6 and a post-tension traction wall plate 4 are connected through a traction rod 5 with an elastic effect, the traction rod 5 is kept in a stretching state, the traction rod 5 generates backward prestress on the back side of the continuous wall body 6, a traction frame 3 with an S-shaped structure is arranged at one end of the inner side of a closed end wall plate 1 and the back side of the continuous wall body 6 in a hollow cavity 2 through a screw head 9, the backward prestress is generated on the continuous wall body 6 through the traction frame 3, and when the continuous wall body 6 is installed, the pressure on the front side of the continuous wall body 6 is offset through the prestress action of the traction rod 5 and the traction frame 3.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A post-tensioned prestressed underground continuous wall comprises a continuous wall main body (6), and is characterized in that two sides of an inner cavity of the continuous wall main body (6) are provided with fore shaft pipe joints (7), a reinforcement cage (8) is arranged inside the continuous wall main body (6), two ends of the continuous wall main body (6) are provided with closed end wall plates (1), the back side of the continuous wall main body (6) is provided with a traction rod (5), and one end of the traction rod (5) is provided with a rear tension traction wall plate (4); the continuous wall main body (6), the closed end wall plate (1) and the rear tension traction wall plate (4) are arranged to be of a connected structure, and hollow cavities (2) are arranged inside two ends of the continuous wall main body (6), the closed end wall plate (1) and the rear tension traction wall plate (4); a traction frame (3) is arranged in the hollow cavity (2), and screw heads (9) are arranged at two ends of the traction frame (3); the drawing frame (3) is provided with a plurality of, and a plurality of drawing frames (3) become S type structure, and the both ends of a plurality of drawing frames (3) are passed through spiral shell head (9) and are installed respectively in the dorsal part of diaphragm wall main part (6) and the inboard one end of closed end wallboard (1).

2. The post-tensioned prestressed underground diaphragm wall as claimed in claim 1, wherein: the draw bar (5) is of an elastic structure, and the installation state of the draw bar (5) is an elastic stretching state.

3. A construction method of the post-tensioned prestressed underground continuous wall as recited in any one of claims 1 to 2, characterized in that: the continuous wall main body and the rear tension traction wall plate are connected through a traction rod with an elastic effect, the traction rod is kept in a stretching state, the traction rod generates backward prestress on the back side of the continuous wall main body, the traction frame with an S-shaped structure is arranged at one end of the inner side of the wall plate with the closed end and the back side of the continuous wall main body through screw heads in the hollow cavity, backward prestress is generated on the continuous wall main body through the traction frame, and when the continuous wall main body is arranged, the pressure on the front side of the continuous wall main body is offset through the backward prestress action of the traction rod and the traction frame.