CN114875931B - Enclosure structure, construction method and removal method of enclosure structure - Google Patents

Abstract

The invention discloses a retaining structure, a construction method of the retaining structure and a demolition method, and relates to the technical field of subway station construction. The retaining structure comprises a retaining structure body and a plurality of pre-buried pipes. The retaining structure body comprises a plurality of bored piles arranged in a row, a steel cage is arranged inside each bored pile, the retaining structure body comprises a demolition boundary and a retaining body to be demolished, the retaining body to be demolished is a part of the retaining structure that needs to be demolished later, the demolition boundary is a boundary of the retaining body to be demolished, the two outermost bored piles on the retaining body to be demolished are both side piles, the bored piles between the two side piles are both middle piles, the part of the side pile located in the retaining body to be demolished is the side pile body to be demolished, and the part of the middle pile located in the retaining body to be demolished is the middle pile body to be demolished; each pre-buried pipe is respectively used for inserting a cutting rope to cut the retaining body to be demolished, thereby reducing noise pollution, reducing damage to the structure and waterproofing, and improving construction efficiency.

Description

Enclosure structure, construction method and removal method of enclosure structure

Technical Field

The present invention relates to the technical field of subway station construction, and in particular to a retaining structure, a construction method of the retaining structure and a dismantling method thereof.

Background Art

At present, blasting hammers are usually used to demolish the wall retaining structures of reserved openings in subway stations. Before construction, a large crane is required to lower the blasting hammer into the foundation pit. During the demolition work, it is difficult to stand, the noise is loud, and a lot of dust is generated, which can easily cause damage to the completed structure and waterproofing.

Summary of the invention

The purpose of the present invention is to provide a protective structure, a construction method of the protective structure and a dismantling method to solve the problems existing in the above-mentioned prior art, reduce noise pollution, reduce damage to the structure and waterproofing, and improve construction efficiency.

To achieve the above object, the present invention provides the following solutions:

The present invention provides a retaining structure, comprising: a retaining structure body and a plurality of pre-buried pipes, the retaining structure body comprising a plurality of bored piles arranged in a row, a steel cage being arranged inside each of the bored piles, the retaining structure body having a demolition boundary and a retaining body to be demolished, the retaining body to be demolished can be demolished by cutting at the demolition boundary, the two outermost bored piles on the retaining body to be demolished are both side piles, the bored pile between the two side piles is both a middle pile, the portion of the side pile located inside the retaining body to be demolished is the side pile body to be demolished, and the portion of the middle pile located inside the retaining body to be demolished is the middle pile body to be demolished; each of the pre-buried pipes is respectively used to penetrate a cutting rope to cut the retaining body to be demolished, the top surface and bottom surface of each of the middle pile bodies to be demolished, the top surface and bottom surface of each of the side pile bodies to be demolished, and the side surface of each of the side pile bodies to be demolished away from the middle pile are all provided with pre-buried pipes, the pre-buried pipes arranged on the top surface and bottom surface of each of the middle pile bodies to be demolished are horizontal pre-buried pipes of the middle piles, and each of the side pile bodies to be demolished The embedded pipes on the top and bottom surfaces are embedded pipes at the ends of the side piles, the embedded pipes on the sides of the side piles to be removed away from the middle piles are vertical embedded pipes, the horizontal embedded pipes of the middle piles, the embedded pipes at the ends of the side piles and the vertical embedded pipes are all located on the demolition boundaries, the horizontal embedded pipes of the middle piles are annular and fixedly sleeved on the outside of the steel cage of each middle pile, the embedded pipes at the ends of the side piles include a first outer embedded pipe and a first inner embedded pipe, both ends of the first inner embedded pipe are connected to the first An outer pre-buried pipe is connected and communicated to form a ring, each of the first inner pre-buried pipes passes through the steel cage of each side pile and is arranged on the inner side of the steel cage of the side pile, each of the first outer pre-buried pipes is fixedly arranged on the outer side of the steel cage of each side pile, each of the vertical pre-buried pipes is ring-shaped, and the upper and lower side edges of each vertical pre-buried pipe respectively pass through the steel cage of each side pile and are arranged on the top and bottom surfaces of the side pile body to be removed, and the two side edges of the vertical pre-buried pipe in the vertical direction are respectively fixedly arranged on the outer side of the steel cage.

Preferably, it also includes a plurality of side pile segmented pre-buried pipes, each of the side pile segmented pre-buried pipes is arranged side by side on the side pile body to be removed between the two side pile end pre-buried pipes, and each of the side pile segmented pre-buried pipes is parallel to the side pile end pre-buried pipes, each of the side pile segmented pre-buried pipes includes a second outer pre-buried pipe and a second inner pre-buried pipe, both ends of the second inner pre-buried pipe are connected to the second outer pre-buried pipe and communicated to form a ring, each of the second inner pre-buried pipes passes through the steel cage of each side pile and is arranged on the side of the side pile body to be removed away from the middle pile, and each of the second outer pre-buried pipes is fixedly arranged on the outside of the steel cage of each side pile.

Preferably, both end ports of each pre-buried pipe are sealed by butt-jointing and hot-melting so that each pre-buried pipe forms a closed pipe.

Preferably, the pre-buried pipeline is a medium-density polyethylene pipe with a diameter of 18 to 22 mm, a wall thickness of 1.8 to 2.2 mm, and a minimum bending radius of 18 to 22 cm.

Preferably, each of the pre-buried pipes is located inside the concrete layer of each of the bored piles, and the butt joints of the two end ports of each of the pre-buried pipes are configured as outwardly convex protrusions.

Preferably, the butt joint of the ports at both ends of the horizontal pre-buried pipe of the center pile is a first protrusion, the butt joint of the ports at both ends of the pre-buried pipe at the end of the side pile is a second protrusion, and the butt joint of the ports at both ends of the vertical pre-buried pipe is a third protrusion. The first protrusion is arranged on the soil-facing side of the center pile, the second protrusion is arranged on the side of the side pile facing the center pile, and the third protrusion is arranged on the soil-facing side of the side pile.

The present invention also provides a construction method of a retaining structure according to any one of claims 1 to 6, comprising the following steps:

S1: Determine the enclosure to be demolished and the demolition boundary according to the structural drawings of the subway;

S2: After the steel cages of the enclosure structure are tied, the embedded pipes are installed on the steel cages according to the relative position between the demolition boundary and the steel cages and tied securely;

S3: placing the steel cage into the drilled hole and pouring concrete to form the bored piles. After all the bored piles are poured, the retaining structure is formed.

The present invention also provides a method for removing a to-be-removed enclosure in a enclosure structure according to any one of claims 1 to 7, comprising the following steps:

S1: excavating the soil on the soil side of the enclosure to be removed until the enclosure to be removed is exposed, chiseling out the pre-buried pipeline according to the position of the pre-buried pipeline, and inserting the cutting rope into the pre-buried pipeline;

S2: Connect the cutting rope to a rope saw cutting machine, so that the cutting rope cuts the enclosure to be removed.

S3: transporting the cut enclosure to be dismantled out.

Preferably, the cutting rope is a diamond rope.

Preferably, the cutting rope is a diamond rope.

Compared with the prior art, the present invention has achieved the following technical effects:

The present invention provides a retaining structure, a construction method for the retaining structure and a dismantling method thereof. Preburied pipes are installed, a cutting rope is inserted into the preburied pipes, and the cutting rope is connected to a rope saw cutting machine to cut the retaining structure attached to the wall. The problem that the retaining structure close to the main structure cannot be directly removed, and the problem that a blasting hammer is used to break the retaining structure is difficult to stand in, the noise is loud, and the completed structure and waterproofing are easily damaged is solved. The construction efficiency is improved, and structural seepage caused by waterproofing and structural damage is avoided.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a vertical cross-sectional view of a protective structure provided by the present invention;

FIG2 is a horizontal cross-sectional view of the enclosure structure provided by the present invention;

FIG3 is a horizontal cross-sectional view of a center pile in the enclosure structure provided by the present invention;

FIG4 is a horizontal cross-sectional view of a side pile to be removed of the enclosure structure provided by the present invention;

In the figure: 1. The retaining structure to be removed; 2. The middle pile to be removed; 3. The side pile to be removed; 4. The steel cage; 5. The horizontal pre-buried pipes at the middle pile; 6. The pre-buried pipes at the ends of the side piles; 7. The vertical pre-buried pipes; 8. The protrusions.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The purpose of the present invention is to provide a protective structure, a construction method of the protective structure and a dismantling method thereof, so as to solve the problems existing in the above-mentioned prior art, avoid noise pollution, avoid damage to the structure and waterproofing, and improve construction efficiency.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

Embodiment 1

As shown in Figures 1 to 4, this embodiment provides a retaining structure, including: a retaining structure body and a plurality of pre-buried pipes, the retaining structure body includes a plurality of bored piles arranged in a row, each bored pile is provided with a steel cage 4 inside, the retaining structure body has a demolition boundary and a retaining body 1 to be demolished, cutting at the demolition boundary can remove the retaining body 1 to be demolished, the two outermost bored piles on the retaining body 1 to be demolished are both side piles, the bored piles between the two side piles are both middle piles, the part of the side pile located inside the retaining body 1 to be demolished is the side pile body 3 to be demolished, and the middle pile is located at the retaining body to be demolished. 1 is the middle pile body 2 to be removed; each pre-buried pipe is used to penetrate the cutting rope to cut the enclosure 1 to be removed, and the top and bottom surfaces of each middle pile body 2 to be removed, the top and bottom surfaces of each side pile body 3 to be removed, and the side of each side pile body 3 to be removed away from the middle pile are all provided with pre-buried pipes. The pre-buried pipes arranged on the top and bottom surfaces of each middle pile body 2 to be removed are the horizontal pre-buried pipes 5 of the middle pile, the pre-buried pipes on the top and bottom surfaces of each side pile body 3 to be removed are the pre-buried pipes 6 at the end of the side pile, the pre-buried pipes on the side of each side pile body 3 to be removed away from the middle pile are the vertical pre-buried pipes 7, and the middle pile horizontal pre-buried pipes 8 are the vertical pre-buried pipes 9. The embedded pipes 5, the embedded pipes 6 at the ends of the side piles, and the vertical embedded pipes 7 are all located on the demolition boundary. The horizontal embedded pipes 5 of each middle pile are annular and fixedly sleeved on the outside of the steel cage 4 of each middle pile. The embedded pipes 6 at the ends of the side piles include a first outer embedded pipe and a first inner embedded pipe. Both ends of the first inner embedded pipe are connected to the first outer embedded pipe and communicated to form an annular shape. Each first inner embedded pipe passes through the steel cage 4 of each side pile and is arranged on the inner side of the steel cage 4 of the side pile. Each first outer embedded pipe is fixedly arranged on the outer side of the steel cage 4 of each side pile. Each vertical embedded pipe 7 is annular. The steel cage 4 that passes through each side pile on the upper and lower sides of the embedded pipe 7 is arranged on the top and bottom surfaces of the side pile body 3 to be demolished, and the two sides of the vertical embedded pipe 7 in the vertical direction are fixedly arranged on the outside of the steel cage 4. Firstly, through the arrangement of each embedded pipe, it is convenient to use a cutting rope to cut the enclosure 1 to be demolished, thereby avoiding noise pollution and damage to the structure and waterproofing. In addition, by arranging the horizontal embedded pipe 5 of the middle pile, the embedded pipe 6 at the end of the side pile and the vertical embedded pipe 7, and arranging the embedded pipe on the outside of the steel cage 4, the construction efficiency can be improved.

Preferably, it also includes a plurality of side pile segmented pre-buried pipes, each of which is arranged side by side on the side pile body 3 to be removed between the pre-buried pipes 6 at the ends of the two side piles, and each of the side pile segmented pre-buried pipes is parallel to the pre-buried pipes 6 at the ends of the side piles, and each of the side pile segmented pre-buried pipes includes a second outer pre-buried pipe and a second inner pre-buried pipe, both ends of the second inner pre-buried pipe are connected to the second outer pre-buried pipe and communicated to form a ring, each second inner pre-buried pipe passes through the steel cage 4 of each side pile and is arranged on the side of the side pile body 3 to be removed away from the middle pile, and each second outer pre-buried pipe is fixedly arranged on the outside of the steel cage 4 of each side pile, and a plurality of side pile segmented pre-buried pipes are arranged in the middle of the side pile body 3 to be removed, which facilitates the horizontal and vertical cutting of the side pile body 3 to be removed, thereby improving the construction efficiency.

Preferably, the two end ports of each pre-buried pipe are butt-connected and hot-melt sealed to form a closed pipe, which can prevent concrete from entering the pre-buried pipe during the bored pile casting process and causing blockage of the pre-buried pipe, thereby improving construction efficiency.

Preferably, the pre-buried pipeline is a medium-density polyethylene pipe with a diameter of 18 to 22 mm, a wall thickness of 1.8 to 2.2 mm, and a minimum bending radius of 18 to 22 cm.

Preferably, each pre-buried pipe is located inside the concrete layer of each bored pile, and the butt joint of the two end ports of each pre-buried pipe is set as an outward protrusion 8. The protrusion 8 is away from the steel cage 4 toward the outside of the bored pile, which can make the pre-buried pipe close to the outer layer of the bored pile, making it convenient to find the pre-buried pipe by chiseling later.

Preferably, the butt joint of the two end ports of the horizontal pre-buried pipe 5 of the center pile is a first protrusion, the butt joint of the two end ports of the pre-buried pipe 6 at the end of the side pile is a second protrusion, and the butt joint of the two end ports of the vertical pre-buried pipe 7 is a third protrusion. The first protrusion is arranged on the soil-facing side of the center pile, the second protrusion is arranged on the side of the side pile facing the center pile, and the third protrusion is arranged on the soil-facing side of the side pile. Excavation will excavate the soil-facing side of the side pile body 3 to be removed. The third protrusion and the first protrusion are arranged on the soil-facing side for the convenience of construction. After cutting off the center pile, the second protrusion 8 can be easily manipulated to facilitate cutting along the pre-buried pipe with a rope saw.

Embodiment 2

This embodiment provides a construction method of the enclosure structure in Embodiment 1, comprising the following steps:

S1: According to the structural drawings of the subway, determine the enclosure 1 to be demolished and the demolition boundary, and take the top 50cm and bottom 10cm of the subway station entrance and exit contour line, and the 10cm retaining piles on both sides of the subway station entrance and exit contour line as the demolition boundary of the enclosure structure body;

S2: After the steel cage 4 of the enclosure structure is tied, the pre-buried pipes are installed on each steel cage 4 according to the relative position between the demolition boundary and the steel cage 4 and are firmly tied with the steel cage 4 using nylon tie to prevent the pipes from deforming and shifting during the lowering of the steel cage 4;

S3: Put the steel cage 4 into the borehole and pour concrete to form bored piles. After all the bored piles are poured, a retaining structure is formed. The bored pile foundation has a diameter of 1m and a spacing of 1400mm.

Embodiment 3

The present invention also provides a construction method of the enclosure structure in the second embodiment, comprising the following steps:

S1: excavate the soil on the soil side of the enclosure 11 to be removed, chisel out the pre-buried pipe according to the position of the protrusion 8 of the pre-buried pipe, and use a threader to pass the cutting rope into the pre-buried pipe;

S2: Connect the cutting rope to the rope saw cutting machine so that the cutting rope can cut the enclosure 1 to be demolished without damaging the main structure and waterproofing, and the flatness of the demolished surface can be easily controlled.

S3: The cut enclosure 1 to be dismantled is transported out by a crane.

Preferably, the cutting rope is a diamond rope, which facilitates the rope saw to cut the retaining piles along the pre-buried pipeline. Diamond rope cutting has the advantages of fast cutting speed, high efficiency, small size and high safety factor.

The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims (9)

1. A kind of enclosure structure, which is composed of a frame, characterized by comprising the following steps:

The building enclosure comprises an enclosure body, wherein the enclosure body comprises a plurality of bored piles arranged in rows, a reinforcement cage is arranged in each bored pile, the enclosure body is provided with a dismantling boundary and an enclosure body to be dismantled, the enclosure body to be dismantled can be dismantled by cutting at the dismantling boundary, two bored piles on the outermost side of the enclosure body to be dismantled are side piles, the bored piles between the two side piles are middle piles, the part of the side piles in the enclosure body to be dismantled is the side pile body to be dismantled, and the part of the middle pile in the enclosure body to be dismantled is the middle pile body to be dismantled; and

The embedded pipelines are respectively used for penetrating the cutting ropes to cut the enclosure body to be dismantled, the top surface and the bottom surface of the middle pile body to be dismantled, the top surface and the bottom surface of the side pile body to be dismantled and the side surfaces of the side pile bodies to be dismantled away from the middle pile are all provided with embedded pipelines, the embedded pipelines arranged on the top surface and the bottom surface of the middle pile body to be dismantled are middle pile horizontal embedded pipelines, the embedded pipelines arranged on the top surface and the bottom surface of the side pile body to be dismantled are side pile end embedded pipelines, the embedded pipelines arranged on the side surfaces of the side pile body to be dismantled are vertical embedded pipelines, the middle pile horizontal embedded pipelines, the side pile end embedded pipelines and the vertical embedded pipelines are all located on the dismantling boundary, the middle pile horizontal embedded pipelines are annular and are fixedly sleeved on the outer sides of reinforcement cages of the middle pile, the two ends of the side pile end embedded pipelines comprise first outer embedded pipelines and first inner embedded pipelines, the two ends of the first inner embedded pipelines are connected and communicated with each other to form an annular shape, the first inner embedded pipelines are arranged on the top surface of the side pile body and the two sides of the vertical side pile, the first embedded pipelines are arranged on the side of the side pile body and the side of the vertical side pile body and the vertical side embedded pipelines are arranged on the two sides of the vertical side of the reinforcement cage and the side pile body and the vertical side embedded pipelines are arranged on the side of the vertical side cage and the side pile body.

2. The enclosure of claim 1, wherein: the side pile embedded type pile comprises a middle pile body, and is characterized by further comprising a plurality of side pile segmented embedded pipelines, wherein each side pile segmented embedded pipeline is arranged on the side pile body to be dismantled and positioned between the two side pile end embedded pipelines side by side, each side pile segmented embedded pipeline is parallel to the side pile end embedded pipeline, each side pile segmented embedded pipeline comprises a second outer embedded pipeline and a second inner embedded pipeline, two ends of the second inner embedded pipeline are connected with the second outer embedded pipeline and communicated to form a ring shape, each second inner embedded pipeline penetrates through a reinforcement cage of each side pile to be dismantled and is arranged on the side surface of the side pile body facing away from the middle pile, and each second outer embedded pipeline is fixedly arranged on the outer side of the reinforcement cage of each side pile.

3. The enclosure of claim 1, wherein: and the ports at the two ends of each embedded pipe are plugged by butt joint and hot melting to form a closed pipe for each embedded pipe.

4. The enclosure of claim 3, wherein: the embedded pipeline is a medium-density polyethylene pipe, the diameter is 18-22 mm, the wall thickness is 1.8-2.2 mm, and the minimum bending radius is 18-22 cm.

5. The enclosure of claim 3, wherein: each embedded pipeline is positioned in the concrete layer of each bored pile, and the butt joint of the two end ports of each embedded pipeline is provided with a convex boss.

6. The enclosure of claim 5, wherein: the butt joint department of the two end ports of the horizontal embedded pipeline of the middle pile is a first bulge, the butt joint department of the two end ports of the embedded pipeline of the side pile end is a second bulge, the butt joint department of the two end ports of the vertical embedded pipeline is a third bulge, the first bulge is arranged on the earth facing side of the middle pile, the second bulge is arranged on the side pile facing to one side of the middle pile, and the third bulge is arranged on the earth facing side of the side pile.

7. A method of constructing an enclosure of any of claims 1-6, comprising: the method comprises the following steps:

S1: determining the enclosure to be dismantled and the dismantling boundary according to a structural drawing of the subway;

s2: after the reinforcement cages of the enclosure structure are bound, installing the embedded pipelines on the reinforcement cages according to the relative positions of the dismantling boundaries and the reinforcement cages, and binding firmly;

s3: and placing the reinforcement cage into a drilled hole, pouring concrete to form the drilled pile, and completing pouring of all the drilled piles to form the enclosure structure.

8. A method of demolishing an enclosure of any one of claims 1-6, comprising: the method comprises the following steps:

S1: excavating soil on the earth facing side of the enclosure to be removed until the enclosure to be removed is exposed, chiseling the embedded pipeline according to the position of the embedded pipeline, and penetrating the cutting rope into the embedded pipeline;

S2: connecting the cutting rope with a rope saw cutting machine to enable the cutting rope to cut the enclosure to be removed;

s3: and carrying out the cut enclosure body to be removed.

9. The removal method as claimed in claim 8, wherein: the cutting rope is a diamond rope.