CN216011990U

CN216011990U - Flexible protection structure for chimney demolition by high-position notch blasting

Info

Publication number: CN216011990U
Application number: CN202122596320.6U
Authority: CN
Inventors: 徐顺香; 谢广波; 罗鹏; 吴赛格; 周祥磊; 刘德禹
Original assignee: Sinosteel Corp Wuhan Safety And Environmental Protection Research Institute Co ltd; Wuhan University of Science and Engineering WUSE
Current assignee: Sinosteel Corp Wuhan Safety And Environmental Protection Research Institute Co ltd; Wuhan University of Science and Engineering WUSE
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-03-11
Anticipated expiration: 2031-10-27

Abstract

The utility model discloses a flexible protective structure that is used for high-order incision blasting to demolish chimney. Punching holes at intervals vertical to the chimney wall at the upper edge of the blasting notch (2), arranging steel pipes (1) with the same diameter as the punched holes in the holes, wherein the steel pipes (1) extend to the outside of the chimney wall, and the steel pipes (1) are hung with flexible protective layers which sequentially comprise geotextile (3), dense-mesh safety nets (4), side slope protective nets (5), geogrids (6) and dense-mesh sun-proof nets (7) from inside to outside; the flexible protective layer covers the free face of the blasting notch (2). The utility model discloses under the mode of all kinds of protection networks and geogrid interval protection, flexible protective material such as protection network can absorb the kinetic energy of blasting flyaway thing to a certain extent, reduces the flyaway thing distance of scattering.

Description

Flexible protection structure for chimney demolition by high-position notch blasting

Technical Field

The utility model belongs to the technical field of the engineering blasting, concretely relates to a flexible protective structure that is used for high-order incision blasting to demolish chimney.

Background

In response to the national policy of energy conservation and emission reduction and high-pressure and low-pressure, and the reason that some old chimneys are eliminated, a large amount of chimney demolition blasting demands emerge, but because the environment around the chimneys is generally complex, new equipment, coal conveying trestles and buildings needing important protection may exist. Reducing or even eliminating the damage of blasting explosives has long been an important condition for the success of demolition blasting operations today and is also an essential and important task.

Methods for reducing or even eliminating the negative effects of blasting explosives are mainly divided into two categories: one is near body protection, namely, the part to be blasted is protected, and the damage effect of the blasting flyaway is weakened or even eliminated at the source of the blasting flyaway; the other type of protection for the objects, namely protection for the objects to be protected in the range where the blasting explosive fly-out can generate harm, weakens or even eliminates the damage effect of the blasting explosive fly-out at the end point of the blasting explosive fly-out.

The prior art prevention means has the following defects: (1) when the chimney is demolished by adopting high-position cut blasting, because the blasting cut is higher, if the near body protection is insufficient, the scattered objects are scattered too far to cause damage; (2) if the near body protection is hard material, secondary damage may be caused.

Disclosure of Invention

The utility model aims at providing a flexible protective structure that is used for high-order incision blasting to demolish chimney to the not enough of prior art existence.

The technical solution of the utility model is that: a flexible protective structure for a chimney is demolished by high-position notch blasting, holes are drilled at intervals in a position perpendicular to a chimney wall and away from the upper edge of a blasting notch, steel pipes with the same diameter as the holes are arranged in the holes, the steel pipes extend to the outside of the chimney wall, flexible protective layers are hung on the steel pipes, and the flexible protective layers sequentially comprise geotextile, a dense-mesh safety net, a side slope protective net, a geogrid and a dense-mesh sun-proof net from inside to outside; the flexible protective layer covers the free face of the blasting notch.

According to the embodiment of the utility model, two-layer geotechnological cloth is wrapped up in the blasting incision, is close to geotechnological cloth wrapping up three-layer dense mesh safety net, arranges one deck wire rope net type side slope protection network next to dense mesh safety net, hugs closely the side slope protection network and arranges two-layer geogrid, hangs geotechnological cloth, dense mesh safety net, side slope protection network, four layers of protection of geogrid on being fixed in the steel pipe with the iron wire, and each layer all follows from top to bottom with iron wire ligature blasting incision, arranges two-layer dense mesh sun-proof net in the outside, and dense mesh sun-proof net hangs and is fixed in on the steel pipe.

According to the embodiment of the utility model provides a, geotechnological cloth, dense mesh safety net, side slope protection network, geogrid four layers protection all use the iron wire to fasten in the chimney and remain the part.

According to the utility model discloses, the scope of flexible inoxidizing coating protection surpasss blasting incision scope 1m at least.

The utility model has the beneficial technical effects that: (1) under the mode of interval protection of various protective nets and geogrids, the flexible protective materials such as the protective nets can absorb the kinetic energy of blasting scattered objects to a certain extent, and the scattering distance of the scattered objects is reduced; (2) the flexible material is used, so that secondary damage caused by protection by using a hard material in the past is avoided; (3) compared with the prior art that hard materials are used for protection, the flexible materials are used for protection, so that the protection is more convenient and faster.

Drawings

Figure 1 is a top view of a flexible guard structure for high notch blasting chimney removal.

Fig. 2 is a schematic view of a flexible protection structure cut protection for a high cut blasting demolition chimney.

In the figure: 1-a steel pipe; 2-blasting a cut; 3-geotextile; 4-dense mesh safety net; 5-side slope protective screening; 6-geogrid; 7-dense mesh sunscreen net; 8-chimney retention; 9-iron wire.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

A flexible protection structure for removing a chimney through high-position notch blasting is characterized in that holes are punched on a position 1.2m away from a blasting notch 2 and perpendicular to the wall of the chimney at an interval of 0.8m, the hole diameter is 40mm, the hole depth is 3/4 of the wall thickness of the chimney, a row of steel pipes 1 with the same diameter as the holes are arranged, 0.5m of the steel pipes 1 are reserved on the outer side of the chimney to serve as a suspended flexible protection layer, two layers of common short-wire geotextile 3 are wrapped on the blasting notch 2 in a close mode, three layers of high-density polyethylene dense mesh safety nets 4 are wrapped on the geotextile 3 in a close mode, one layer of steel wire rope type slope protection net 5 is arranged on the dense mesh safety net 4, two layers of plastic geogrids 6 are arranged on the slope protection net 5 in a close mode, the four layers of protection are suspended and fixed on the steel pipes 1 through iron wires 9, the upper edge and the lower edge of the blasting notch 2 are bound through the iron wires 9, two layers of high-density polyethylene dense mesh sun-proof meshes 7 are arranged on the outermost side, the dense mesh sun-proof net 7 is only fixed on the steel pipes 1, and all protection needs to cover all blast cut 2 free faces.

Each layer of protection is suspended and fixed on the steel pipe 1 by using an iron wire 9; the front four layers of protection are fastened to a chimney reserved part 8 by using iron wires 9, the outermost dense-mesh sunscreen net 7 is only hung and fixed on the steel pipe 1, and each layer of protection covers the free face of all the blasting cuts 2; the range of all guards exceeds the blast cut range by at least 1 m.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A flexible protection structure for removing a chimney through high-position notch blasting is characterized in that holes are formed at intervals in a position, away from the upper edge of a blasting notch (2), of the chimney wall, steel pipes (1) with the same diameter as the holes are arranged in the holes, the steel pipes (1) extend to the outer portion of the chimney wall, flexible protection layers are hung on the steel pipes (1), and the flexible protection layers sequentially comprise geotextiles (3), dense-mesh safety nets (4), side slope protection nets (5), geogrids (6) and dense-mesh sun-proof nets (7) from inside to outside; the flexible protective layer covers the free face of the blasting notch (2).

2. The flexible protection structure for the chimney is dismantled through high-position incision blasting according to claim 1, characterized in that two layers of geotechnical cloth (3) are wrapped in the blasting incision (2), three layers of dense mesh safety nets (4) are wrapped next to the geotechnical cloth (3), one layer of steel wire rope net type side slope protection net (5) is arranged next to the dense mesh safety nets (4), two layers of geogrids (6) are arranged close to the side slope protection net (5), the geotechnical cloth (3), the dense mesh safety nets (4), the side slope protection net (5) and the geogrid (6) are all hung and fixed on the steel pipe (1) through iron wires (9), the upper edge and the lower edge of the blasting incision (2) are bound through the iron wires (9), two layers of dense mesh sun-proof nets (7) are arranged on the outermost sides, and the dense mesh sun-proof nets (7) are hung and fixed on the steel pipe (1).

3. A flexible protection structure for high incision blasting chimney demolition according to claim 1, characterized in that the four layers of protection of geotextile (3), dense mesh safety net (4), side slope protection net (5), geogrid (6) are fastened to the chimney retention part (8) using iron wires (9).

4. A flexible shielding structure for high notch blasting demolition chimney according to claim 1, characterized in that the range of the flexible shielding layer is at least 1m beyond the range of the blasting notch (2).