CN108871128B - Method for blasting power transmission tower by using prefabricated granular medium - Google Patents

Method for blasting power transmission tower by using prefabricated granular medium Download PDF

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Publication number
CN108871128B
CN108871128B CN201810722062.1A CN201810722062A CN108871128B CN 108871128 B CN108871128 B CN 108871128B CN 201810722062 A CN201810722062 A CN 201810722062A CN 108871128 B CN108871128 B CN 108871128B
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China
Prior art keywords
angle steel
cylindrical
blasting
power transmission
transmission tower
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CN201810722062.1A
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CN108871128A (en
Inventor
钟明寿
龙源
纪冲
赵长啸
李兴华
高福银
陈德志
李本伟
殷勤
马华源
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Nanjing Monarch Explosion Engineering Technology Co Ltd
Army Engineering University of PLA
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Nanjing Monarch Explosion Engineering Technology Co Ltd
Army Engineering University of PLA
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42DBLASTING
    • F42D3/00Particular applications of blasting techniques
    • F42D3/02Particular applications of blasting techniques for demolition of tall structures, e.g. chimney stacks
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/34Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
    • E04H12/348Arrangements for demolition towers or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42DBLASTING
    • F42D1/00Blasting methods or apparatus, e.g. loading or tamping

Abstract

The invention discloses a method for blasting a power transmission tower by using prefabricated granular media, which comprises the following steps of: (1) processing angle steel according to the structure of the power transmission tower; (2) punching holes at proper positions of the angle steels; (3) conveying the blasting device to a power transmission tower, connecting a first angle steel with an angle steel to be blasted to form a cylindrical structure, mounting a third angle steel at the bottom of the cylindrical structure, and sealing the bottom of the cylindrical structure; (4) putting the connecting pipe into a cylindrical structure, putting the medicine bag into the connecting pipe, and filling a prefabricated granular medium outside the connecting pipe; (5) sealing the cylindrical structure through third angle steel at the top of the cylindrical structure; (6) protection, evacuation and warning, and detonation can be carried out after preparation work is finished before detonation. According to the invention, the whole device is fixed into a cylindrical structure only by utilizing the angle steel and the bolts, the prefabricated granular medium and the explosive bag are placed in the closed space, and the blasting failure degree is greatly improved by utilizing the incompressibility of the prefabricated granular medium, so that the blasting effect can be ensured.

Description

Method for blasting power transmission tower by using prefabricated granular medium
Technical Field
The invention relates to a method for blasting a power transmission tower by using prefabricated granular media, and belongs to the field of blasting.
Background
According to the planning, tens of extra-high voltage direct current projects are built in China in the next 10-20 years, an extra-high voltage alternating current and direct current series-parallel power grid is gradually formed, and the extra-high voltage direct current and alternating current system supplies power to the load center in the middle east. In order to solve the problems that a multi-feed-in direct current system is insufficient in voltage reactive power supporting capability of a receiving-end power grid, short-circuit current is crossed due to dense system sending-out and the like, the ultrahigh voltage layered direct current becomes a new direct current access mode. Compared with the conventional ultrahigh voltage direct current, the method has the main difference that the high-end converter transformer and the low-end converter transformer on the inversion side are respectively connected to 500kV and 1000kV power grids, and the alternating current filter and the reactive compensation device are also respectively connected to 500kV and 1000kV power grids.
However, when the extra-high voltage power transmission tower is built, most of the old iron towers and the newly built new iron tower are on the same path, and the construction can be carried out only after the original line ground wire and the iron tower are dismantled. The dismantling of the angle iron tower in China also belongs to a primary stage, needs to be carried out by workers, and is high in labor intensity, low in working efficiency and high in danger. In the angle iron tower, the blasting cannot be performed through punching, only the blasting can be performed in an exposed mode, a large part of energy is emitted to the air, and the blasting effect is poor. Because the power transmission tower is located in the mountainous area, sufficient electric power is not available, welding cannot be carried out on the site, and the mountainous area is inconvenient to traffic and cannot transport materials in large batches.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the method for blasting the power transmission tower by using the prefabricated granular medium, the whole device is fixed into a cylindrical structure only by using angle steel and bolts, the prefabricated granular medium and the explosive package are placed in the closed space, and the blasting failure degree is greatly improved by using the incompressibility of the prefabricated granular medium, so that the blasting effect can be ensured.
The technical scheme is as follows: in order to solve the technical problem, the method for blasting the power transmission tower by using the prefabricated granular medium comprises the following steps of:
(1) according to the structure of the power transmission tower, processing a first angle steel, a second angle steel, a third angle steel and a fourth angle steel with proper sizes, and welding the fourth angle steel at two ends of the inner side of the first angle steel;
(2) punching holes at proper positions of the first angle steel, the second angle steel, the third angle steel and the fourth angle steel, and preparing a prefabricated granular medium, a explosive package, a nonel detonator and a connecting pipe;
(3) conveying the blasting device to a power transmission tower, connecting the first angle steel with the angle steel to be blasted through the second angle steel to form a cylindrical structure, installing a third angle steel at the bottom of the cylindrical structure, connecting the third angle steel with the first angle steel and the fourth angle steel through bolts, and sealing the bottom of the cylindrical structure;
(4) placing the connecting pipe into the cylindrical structure, placing the explosive package into the connecting pipe, fixing the explosive package in the connecting pipe through stemming, leading the explosive package out of the cylindrical structure through a detonator of a detonating tube, and filling a prefabricated particle medium outside the connecting pipe until the prefabricated particle medium is slightly lower than the opening height of the upper end of the first angle steel after natural sedimentation is finished;
(5) sealing the cylindrical structure through third angle steel at the top of the cylindrical structure, and fixing the third angle steel, the first angle steel and the fourth angle steel through bolts;
(6) protection, evacuation and warning, and detonation can be carried out after preparation work is finished before detonation.
Preferably, the third angle steel is provided with a waist-shaped groove.
Preferably, in the step (2), the explosive package is rock emulsion explosive, which is easier to obtain than controlled explosive.
Preferably, in the step (4), the interval between adjacent explosive packages in the connecting pipe is 10-20cm, and the work-doing capability of the explosive is more fully utilized in the same amount of explosive.
Has the advantages that: according to the method for blasting the power transmission tower by using the prefabricated granular media, the whole device is fixed into a cylindrical structure only by using the angle steel and the bolts, the prefabricated granular media and the explosive bags are placed in the closed space, and the blasting failure degree is greatly improved by using the incompressibility of the prefabricated granular media, so that the blasting effect can be ensured; and compare the concrete piece, prefabricated granule medium more does benefit to the transportation, more is fit for the blasting of the power transmission tower that is inconvenient for traffic.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of fig. 1.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the blasting method of the device for blasting a power transmission tower by using a prefabricated granular medium according to the present invention comprises the following steps:
(1) according to the requirements, processing a first angle steel 1, a second angle steel 3, a third angle steel 4 and a fourth angle steel 5 with proper sizes, and welding the fourth angle steel 5 at two ends of the inner side of the first angle steel 1;
(2) punching holes at proper positions of a first angle steel 1, a second angle steel 3, a third angle steel 4 and a fourth angle steel 5, and preparing a prefabricated granular medium 2, a explosive package 7, a detonating tube detonator and a connecting pipe;
(3) the blasting device is conveyed to a power transmission tower, the first angle steel 1 is connected with angle steel 6 to be blasted through second angle steel 3 to form a cylindrical structure, third angle steel 4 is installed at the bottom of the cylindrical structure, the third angle steel 4 is connected with the first angle steel 1 and the fourth angle steel 5 through bolts, and the bottom of the cylindrical structure is sealed;
(4) placing the connecting pipe into the cylindrical structure, placing the explosive package 7 into the connecting pipe, fixing the explosive package 7 in the connecting pipe through stemming, leading the explosive package 7 out of the cylindrical structure through a detonator of a detonating tube, and filling the prefabricated granular medium 2 outside the connecting pipe until the prefabricated granular medium 2 is naturally settled and is slightly lower than the opening height of the upper end of the first angle steel;
(5) the top of the cylindrical structure is sealed by the third angle steel 4, and the third angle steel 4 is fixed with the first angle steel 1 and the fourth angle steel 5 through bolts;
(6) protection, evacuation and warning, and detonation can be carried out after preparation work is finished before detonation.
According to the angle iron blasting machine, the first angle iron 1 and the angle iron 6 to be blasted are connected into a whole by the second angle iron 3, the connecting part of the two angle irons is fixed by the second angle iron 3, so that the angle iron blasting machine can be suitable for blasting of the angle iron 6 to be blasted at various angles, and the angle iron 6 to be blasted at various angles can connect the first angle iron 1 and the angle iron 6 to be blasted into a whole by the second angle iron 3 to form a closed space.
In the present invention, the pre-granulated medium 2 is preferably a sand medium having a particle size of 0.25 to 0.35mm, and the connection pipe is preferably a PVC pipe. And cutting horizontal and longitudinal precut seams (40 mm in length and 5mm in width) at intervals of 5cm on the outer side of the angle steel to be demolished by blasting, wherein the precut seams are sealed by glue, and the blasting effect is greatly improved. The second angle steel is selected for use and is the angle steel of two times of waiting to explode the angle steel thickness at least, improves the blasting effect.

Claims (4)

1. A method for blasting a power transmission tower by using prefabricated granular media is characterized by comprising the following steps: the method comprises the following steps:
(1) according to the structure of the power transmission tower, processing a first angle steel, a second angle steel, a third angle steel and a fourth angle steel with proper sizes, and welding the fourth angle steel at two ends of the inner side of the first angle steel;
(2) punching holes at proper positions of the first angle steel, the second angle steel, the third angle steel and the fourth angle steel, and preparing a prefabricated granular medium, a explosive package, a nonel detonator and a connecting pipe;
(3) conveying the blasting device to a power transmission tower, connecting the first angle steel with the angle steel to be blasted through the second angle steel to form a cylindrical structure, installing a third angle steel at the bottom of the cylindrical structure, connecting the third angle steel with the first angle steel and the fourth angle steel through bolts, and sealing the bottom of the cylindrical structure;
(4) placing the connecting pipe into the cylindrical structure, placing the explosive package into the connecting pipe, fixing the explosive package in the connecting pipe through stemming, leading the explosive package out of the cylindrical structure through a detonator of a detonating tube, and filling a prefabricated particle medium outside the connecting pipe until the prefabricated particle medium is slightly lower than the opening height of the upper end of the first angle steel after natural sedimentation is finished;
(5) sealing the cylindrical structure through third angle steel at the top of the cylindrical structure, and fixing the third angle steel, the first angle steel and the fourth angle steel through bolts;
(6) protection, evacuation and warning, and detonation can be carried out after preparation work is finished before detonation.
2. The method for blasting a power transmission tower with a prefabricated granular medium according to claim 1, wherein the method comprises the following steps: in the step (1), a waist-shaped groove is processed on the third angle steel.
3. The method for blasting a power transmission tower with a prefabricated granular medium according to claim 1, wherein the method comprises the following steps: in the step (2), the explosive package is rock emulsion explosive.
4. The method for blasting a power transmission tower with a prefabricated granular medium according to claim 1, wherein the method comprises the following steps: in the step (4), the interval between adjacent medicine packages in the connecting pipe is 10-20 cm.
CN201810722062.1A 2018-07-04 2018-07-04 Method for blasting power transmission tower by using prefabricated granular medium Active CN108871128B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810722062.1A CN108871128B (en) 2018-07-04 2018-07-04 Method for blasting power transmission tower by using prefabricated granular medium

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Application Number Priority Date Filing Date Title
CN201810722062.1A CN108871128B (en) 2018-07-04 2018-07-04 Method for blasting power transmission tower by using prefabricated granular medium

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CN108871128B true CN108871128B (en) 2020-03-10

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100559936B1 (en) * 2005-01-04 2006-03-13 대원전기 주식회사 Blasting method for constructing base of power transmission tower
CN102953576B (en) * 2012-10-30 2015-06-03 中国电力科学研究院 Steel pipe and angle iron hybrid ultrahigh-voltage power transmission tower
CN103938888B (en) * 2014-05-14 2016-01-27 中钢集团武汉安全环保研究院有限公司 The blasting demolishing method of a kind of tubular steel column structure construction of structures
CN104964624B (en) * 2015-07-01 2018-05-22 湖北工业大学 Reinforced beam axially pre-buried blasthole and demolition blasting method
CN107328328A (en) * 2017-08-24 2017-11-07 徐州雷鸣民爆器材有限公司 The blasting method of steel construction

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