Isolation device for pile foundation underpinning

Abstract

The utility model relates to the technical field of subway construction, in particular to an isolating device for pile foundation underpinning, which comprises a plurality of circular rings, the plurality of circular rings are arranged up and down at equal intervals, and support rods are circumferentially connected among the plurality of circular rings at equal intervals; a separation net is connected between every two vertically adjacent circular rings, and the separation nets are fixedly connected to the supporting rods; the separation net is bent to be of a cylindrical structure, and the separation net is arranged on the outer surfaces of the multiple supporting rods in a sleeving mode; the outer diameter of the separation net is equal to that of the circular ring; the separation net is connected to the supporting rods through binding structures. The binding structure is one of an iron wire, a rope or a U-shaped hoop. The plurality of circular rings are arranged up and down at equal intervals, the plurality of circular rings are supported and fixed through the supporting rods to form a cylindrical frame, the outer surface of the cylindrical frame is covered with the isolation net, and the hole wall is supported through the isolation net. After the hole is formed, the hole wall is effectively prevented from collapsing, and the shape space of the hole groove is effectively kept.

Description

Technical Field

[0001] The utility model relates to the technical field of subway construction, in particular to an isolation device for pile foundation replacement. Background Art

[0002] During subway construction, the foundation of the original building needs to be underpinned. However, the construction period of pile foundation underpinning is long, and the quality of the pile foundation cannot be guaranteed. During the underpinning process, the foundation of the building may become unstable.

[0003] Pile foundation replacement construction has many risk sources and the risk source levels are high. The supervision department must be more meticulous in risk control of dark excavation construction. The main risks include: the risk of stress problems caused by quality problems of bored cast-in-place pile products. An isolation device for pile foundation replacement is designed. It is placed in the hole after the hole is formed. It opens in the mud by its own elasticity and adheres to the hole wall, playing a supporting role and effectively preventing the hole wall from collapsing. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a pile foundation support replacement isolation device, which is put into the hole after drilling and expands in the mud by its own elasticity to cling to the hole wall, thereby playing a supporting role and effectively preventing the hole wall from collapsing.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: an isolation device for pile foundation support replacement, comprising a plurality of circular rings, the plurality of circular rings are arranged equidistantly up and down, and support rods are connected equidistantly between the plurality of circular rings;

[0006] An isolation net is connected between two upper and lower adjacent rings, and the isolation net is fixedly connected to the support rod.

[0007] As a preferred solution of the isolation device for pile foundation replacement of the utility model, the isolation net is bent into a cylindrical structure, and the isolation net is sleeved on the outer surface of a plurality of the support rods.

[0008] As a preferred solution of the isolation device for pile foundation replacement of the utility model, the outer diameter of the isolation net is equal to the outer diameter of the ring.

[0009] As a preferred solution of the pile foundation support replacement isolation device of the utility model, wherein: the isolation net is connected to the support rod through a binding structure.

[0010] As a preferred solution of the pile foundation support replacement isolation device of the utility model, the binding structure is one of iron wire, rope or U-shaped clamp.

[0011] As a preferred solution of the pile foundation support replacement isolation device of the utility model, wherein: the top of the circular ring is provided with through holes equidistantly arranged in a circle, and the support rods are inserted into the inside of the through holes.

[0012] As a preferred solution of the isolation device for pile foundation replacement of the utility model, a plurality of fixing nuts are provided on the threaded sleeve of the outer surface of the support rod, and two upper and lower adjacent fixing nuts abut against the top and bottom of the ring.

[0013] By means of the above technical solution, the utility model provides a pile foundation support replacement isolation device, which has at least the following beneficial effects:

[0014] The pile foundation support replacement isolation device can be arranged according to the size of the cast-in-place pile. Multiple circular rings are arranged equidistantly up and down. The multiple circular rings are supported and fixed by support rods to form a cylindrical frame. The isolation net is laid on its outer surface to support the hole wall. After the hole is formed, it effectively prevents the hole wall from collapsing and effectively maintains the shape and space of the hole groove. At the same time, the device can be used to find out the general shape of the hole position, whether the steel cage is placed down enough, and ensure the thickness of the protective layer of the cast-in-place pile, which can effectively avoid the cage jam. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the circular ring structure of the utility model.

[0019] In the figure: 100, circular ring; 200, supporting rod; 300, isolation net; 400, fixing nut; 500, through hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3, an isolation device for pile foundation replacement, comprising a plurality of circular rings 100, the plurality of circular rings 100 are arranged equidistantly up and down, and support rods 200 are connected equidistantly between the plurality of circular rings 100;

[0022] In this embodiment, an isolation net 300 is connected between two adjacent circular rings 100, and the isolation net 300 is fixedly connected to the support rod 200. Multiple circular rings 100 are arranged equidistantly from top to bottom, and the multiple circular rings 100 are supported and fixed by the support rod 200 to form a cylindrical frame, and the isolation net 300 is laid on its outer surface to support the hole wall through the isolation net 300. After the hole is formed, the hole wall collapse is effectively prevented, and the shape and space of the hole groove are effectively maintained; at the same time, the device can be used to detect the general shape of the hole position, whether it is enough to lower the steel cage, and ensure the thickness of the protective layer of the cast-in-place pile, which can effectively avoid the cage jam.

[0023] In this embodiment, the isolation net 300 is bent into a cylindrical structure, and the isolation net 300 is sleeved on the outer surface of a plurality of support rods 200. After the hole is formed, the device is placed in the pile hole, and after the mud is poured into the pile hole, since the isolation net 300 itself has a certain elasticity, under the impact of the mud, the isolation net 300 will cling to the hole wall, play a supporting role on the hole wall, and effectively prevent the hole wall from collapsing.

[0024] In this embodiment, the outer diameter of the isolation net 300 is equal to the outer diameter of the ring 100. The ring 100 can enhance the support force of the isolation net 300 to prevent the hole wall from collapsing.

[0025] In this embodiment, the isolation net 300 is connected to the support rod 200 through a binding structure. The isolation net 300 is bent into a cylindrical shape and is sleeved on the outer surface of a plurality of support rods 200. The isolation net 300 is fixed to the support rod 200 through the binding structure between the other two adjacent rings 100 above and below, which facilitates the installation and fixing of the isolation net 300.

[0026] In some embodiments, when the binding structure is a wire, the movable end of the wire passes through a mesh of the isolation net 300, bypasses the support rod 200 and passes through another mesh of the isolation net 300, and then the two ends of the wire are tightened together, and the isolation net 300 can be fixed to the support rod 200 through the wire. In order to ensure the stability of the installation of the isolation net 300, the isolation net 300 is fixed on each support rod 200 by multiple wires.

[0027] In some embodiments, when the binding structure is a rope, one end of the rope is inserted through a mesh of the isolation net 300, and passes around the support rod 200 and out of another mesh of the isolation net 300, and then the two ends of the rope are tightened and tied together to fix the isolation net 300 on the support rod 200 through multiple ropes.

[0028] In some embodiments, when the binding structure is a U-shaped clamp, the U-shaped clamp includes a U-shaped bolt, a connecting plate and a locking nut. The two ends of the U-shaped bolt pass through the inner side of the support rod 200 and penetrate into the two mesh holes of the isolation net 300. The two through holes on the connecting plate are put on the two ends of the U-shaped bolt, and the locking nut is tightened. The inner side of the U-shaped bolt can be abutted against the support rod 200, and the connecting plate can be abutted against the outer surface of the isolation net 300. The isolation net 300 can be fixed on the support rod 200 through the U-shaped clamp.

[0029] In this embodiment, the top of the ring 100 is provided with through holes 500 at equal intervals around the circumference, and the support rod 200 is inserted into the through holes 500. During installation, the bottom ring 100 is first sleeved on the support rod 200, and after it is fixed, multiple rings 100 are sequentially sleeved on the support rod 200, and the multiple rings 100 are supported and fixed by the support rod 200.

[0030] In this embodiment, a plurality of fixing nuts 400 are threadedly sleeved on the outer surface of the support rod 200, and two upper and lower adjacent fixing nuts 400 abut against the top and bottom of the ring 100. The stability of fixing the ring 100 is ensured by the two upper and lower adjacent fixing nuts 400.

[0031] During installation, the bottommost ring 100 is first placed on the support rod 200, and the ring 100 is fixed by two fixing nuts 400, with the two upper and lower adjacent fixing nuts 400 respectively abutting against the top and bottom of the ring 100; then, multiple rings 100 are placed on the support rod 200 in sequence and fixed by the fixing nuts 400;

[0032] Bend the isolation net 300 into a cylindrical shape and put it on the outer surface of the plurality of support rods 200. The isolation net 300 is fixed on the support rods 200 by a binding structure between two adjacent upper and lower rings 100.

[0033] When in use, a suitable isolation device is selected according to the size of the bored pile, so that the outer diameter of the isolation net 300 is equal to the inner diameter of the pile hole. After the hole is formed, the isolation device is placed in the pile hole. After mud is poured into the pile hole, since the isolation net 300 itself has a certain elasticity, under the impact of the mud, the isolation net 300 will cling to the hole wall, support the hole wall, and effectively prevent the hole wall from collapsing.

[0034] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An isolation device for pile foundation replacement, comprising a plurality of rings (100), characterized in that: The plurality of circular rings (100) are arranged equidistantly from top to bottom, and support rods (200) are connected equidistantly between the plurality of circular rings (100); An isolation net (300) is connected between two upper and lower adjacent circular rings (100), and the isolation net (300) is fixedly connected to the support rod (200); The top of the circular ring (100) is provided with through holes (500) which are equidistantly arranged in a circumference, and the support rod (200) is inserted into the through holes (500); The outer surface of the support rod (200) is threadedly sleeved with a plurality of fixing nuts (400), and two upper and lower adjacent fixing nuts (400) abut against the top and bottom of the circular ring (100).

2. The isolation device for pile foundation replacement according to claim 1, characterized in that: The isolation net (300) is bent into a cylindrical structure, and the isolation net (300) is sleeved on the outer surfaces of the plurality of support rods (200).

3. The isolation device for pile foundation replacement according to claim 1, characterized in that: The outer diameter of the isolation net (300) is equal to the outer diameter of the ring (100).

4. The isolation device for pile foundation replacement according to claim 1, characterized in that: The isolation net (300) is connected to the support rod (200) via a binding structure.

5. The isolation device for pile foundation replacement according to claim 4, characterized in that: The binding structure is one of iron wire, rope or U-shaped clamp.

Images