Blasting demolition method for concrete filled steel tube stand column
By determining the blasting damage site on the steel pipe concrete column and installing a blasting device and a flexible energy-concentrating cutting cable, the problems of low efficiency and high risk of steel pipe concrete components in the prior art are solved, and efficient and safe removal effect is achieved.
Patent Information
- Application Number
- CN202510467618.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2025-06-06
AI Technical Summary
The prior art is difficult to effectively remove steel pipe concrete components, especially in improving operating efficiency and reducing demolition risks.
By determining the blasting damage location of the concrete column of the steel pipe, selecting the center line along the radial direction of the site to determine the position of the gun hole, installing a blasting device and a flexible energy-concentrating cutting cable, detonating to remove the column.
It realizes efficient removal of steel pipe concrete columns, reduces the use of explosives, reduces the harmful effects of blasting, and ensures the safety of the demolition process.
Smart Images
Figure CN120100215A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of building (structure) demolition, and in particular to a method for blasting and demolishing a steel tube concrete column. Background Art
[0002] Concrete-filled steel tube components are a composite structure formed by pouring concrete into a steel tube. Relying on the support of the inner concrete, the stability of the concrete-filled steel tube components is enhanced. It has the characteristics of less steel consumption, low cost, strong bearing capacity, and good quality control. With the urbanization construction and industrial upgrading and transformation activities, a large number of buildings (structures) have been actively demolished. Among them, concrete-filled steel tube components, as a composite structure, have complex structural forces, and are extremely difficult and risky to demolish.
[0003] At present, there are few studies on the demolition of steel tube concrete components, and there is a lack of safe and systematic demolition methods. The existing demolition methods for steel tube concrete components are only mechanical demolition and blasting demolition. Mechanical demolition generally cuts the steel tube by cutting with a rope saw, but it has problems such as long demolition time, high noise, and serious dust pollution. In addition, the structure is very easy to become unstable and collapse during the demolition process, which poses a high safety risk. Although blasting demolition has the advantages of high operating efficiency and good construction safety, it cannot reliably destroy the steel tube outside the component, and is not applicable to the demolition of steel tube concrete components in complex situations.
[0004] Therefore, how to provide a blasting demolition method for steel tube concrete columns so that it can achieve the technical effect of improving the efficiency of steel tube concrete component demolition and reducing demolition risks is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention
[0005] In view of the problems existing in the prior art, the technical problem to be solved by the present invention is to provide a method for blasting and demolishing steel tube concrete columns, so that it can achieve the technical effect of improving the efficiency of demolishing steel tube concrete components and reducing the risk of demolition.
[0006] To achieve the above-mentioned purpose, the present invention provides a method for blasting demolition of a steel tube concrete column, the method comprising: determining a blasting damage position of the steel tube concrete column according to the length of the steel tube concrete column; selecting a center line along the radial direction of the blasting damage position of the steel tube concrete column, determining a blasthole position, and installing a blasting device; and detonating the blasting device to demolish the steel tube concrete column.
[0007] In the first aspect, the blasting destruction site is located in the middle of the steel tube concrete column; the length of the blasting destruction site is 1 / 3 to 3 / 4 of the length of the steel tube concrete column.
[0008] In the first aspect, the method of selecting a radial center line along the blasting damage part of the steel tube concrete column, determining the position of the blasthole, and installing the blasting device specifically includes: arranging a number of blasting loops at even intervals along the axial direction of the steel tube concrete column at the blasting damage part, and the axis of each blasting loop is in the same straight line as the axis of the steel tube concrete column; determining the position of the blasthole along the radial center line of each blasting loop, obtaining the opening position of the blasthole and the depth of the blasthole at the same time, drilling the blasthole and arranging the blasthole blasting device; arranging a longitudinal cutting seam on the steel tube shell at the blasting damage part to destroy the local integrity of the steel tube shell; arranging a circle of flexible energy-gathering cutting rope on each blasting loop; wherein the center of each blasthole position and a corresponding one of the flexible energy-gathering cutting ropes are located on the radial plane of the same blasting loop; each of the blasthole blasting devices and each of the flexible energy-gathering cutting ropes are clustered together in the same detonation network.
[0009] In the first aspect, the longitudinal cutting seams arranged on the steel tube shell at the blasting destruction site specifically include: a plurality of groups of first longitudinal cutting seams and a plurality of groups of second longitudinal cutting seams are arranged at intervals along the axial direction of the steel tube concrete column on the steel tube shell at the blasting destruction site, and any adjacent group of the first longitudinal cutting seams and the second longitudinal cutting seams are staggered; each group of the first longitudinal cutting seams connects the nth blasting loop with the n+2th blasting loop, and each group of the second longitudinal cutting seams connects the n-1th blasting loop with the n+1th blasting loop.
[0010] In the first aspect, each group of the first longitudinal cutting seams includes three first longitudinal cutting seams, and the three first longitudinal cutting seams are opened along the circumferential direction of the steel tube concrete column. Each of the first longitudinal cutting seams is perpendicular to the radial plane of any connected blasting loop line. The triangle formed by the lines connecting the intersection points of the three first longitudinal cutting seams on the radial plane of the same blasting loop line is a first isosceles triangle, and the maximum angle of the first isosceles triangle is 120 degrees.
[0011] In the first aspect, each group of the second longitudinal cutting seams includes three second longitudinal cutting seams, and the three second longitudinal cutting seams are opened along the circumferential direction of the steel tube concrete column. Each second longitudinal cutting seam is perpendicular to the radial plane of any connected blasting loop line. The triangle formed by the lines connecting the intersection points of the three second longitudinal cutting seams on the radial plane of the same blasting loop line is a second isosceles triangle, and the maximum angle of the second isosceles triangle is 120 degrees.
[0012] In the first aspect, each of the first longitudinal cutting seams and each of the second longitudinal cutting seams are staggered.
[0013] In the first aspect, obtaining the opening position of the blasthole specifically includes: at the blasthole position determined on the blasting loop, cutting the steel pipe shell at the blasting damage portion by oxy welding to obtain the opening position of the blasthole.
[0014] In the first aspect, the depth of the blasthole is 2 / 3 of the diameter of the steel tube concrete column.
[0015] In the first aspect, the center line of the first isosceles triangle formed by the three first longitudinal cutting seams in each group of the first longitudinal cutting seams is located on the cross-section of the blast hole corresponding to the radial plane of any connected blasting loop line, and the center line of the second isosceles triangle formed by the three second longitudinal cutting seams in each group of the second longitudinal cutting seams is located on the cross-section of the blast hole corresponding to the radial plane of any connected blasting loop line.
[0016] Beneficial effects:
[0017] The invention discloses a method for blasting and demolishing a steel tube concrete column. The steel tube concrete column is a columnar structure with concrete filled inside a steel tube. According to the actual height or length of the steel tube concrete column, the blasting destruction position required for blasting and demolishing is determined, so that less explosives can be used to make the steel tube concrete column unstable, the amount of explosives used can be reduced, and the harmful effects of blasting are reduced. The concrete of the steel tube concrete column is constrained by the steel tube and is difficult to be blasted and demolished. A longitudinal cutting seam is arranged on the steel tube shell of the steel tube concrete column by oxygen welding cutting to destroy the stability of the steel tube, so as to facilitate the blasting and demolishing of the steel tube concrete column. The blasting hole position is determined to facilitate the installation of a blasting hole blasting device and a flexible energy-gathering cutting rope. The blasting hole is located in the concrete, and explosives are filled in each blasting hole as the explosion source of the blasting hole blasting device. The explosives can be selected from emulsified explosives, and for the steel tube, the flexible energy-gathering cutting rope is used to cut the steel tube. The flexible energy-gathering cutting cable is installed around the outer periphery of the steel pipe in close contact with the steel pipe. At the same time, each blasting hole blasting device and each flexible energy-gathering cutting cable are the same blasting net, so that the blasting of the concrete and steel pipe of the steel tube concrete column can be completed in a controlled time, the blasting hole of the steel tube concrete column is destroyed, and the concrete and steel pipe structure of the steel tube concrete column is effectively destroyed, so that the steel tube concrete column is unstable, so as to complete the demolition of the steel tube concrete column; in summary, the blasting demolition method of the steel tube concrete column of the present invention has low construction difficulty and short operation time, and can ensure that the steel tube concrete column is destroyed and unstable and is demolished; in addition, in the construction work before blasting, the relative integrity of the steel tube concrete column is maintained, and the bearing performance of the steel tube concrete column is guaranteed, so as to avoid the instability and collapse accidents in the construction process before blasting demolition, and ensure the safety of blasting demolition operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of this specification 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.
[0019] Figure 1 It is a structural schematic diagram of a steel tube concrete column of the present invention;
[0020] Figure 2 It is a schematic structural diagram of the blasting method of the steel tube concrete column of the present invention;
[0021] Figure 3 It is a structural schematic diagram of a flexible energy-gathering cutting cable of the present invention.
[0022] Reference numerals:
[0023] 1. Steel tube concrete column; 11. Steel tube; 12. Concrete;
[0024] 21. Gun hole; 22. Gun hole position; 23. Longitudinal cutting seam; 231. First longitudinal cutting seam; 232. Second longitudinal cutting seam; 24. Flexible energy-gathering cutting rope; 241. Flexible energy-gathering shell; 242. Charge cover; 243. Energy-gathering hole. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.
[0026] Embodiment 1
[0027] like Figures 1 to 3 As shown, this embodiment 1 provides a method for blasting demolition of a steel tube concrete column, and the method for blasting demolition of the steel tube concrete column 1 includes: determining the blasting damage position of the steel tube concrete column 1 according to the length of the steel tube concrete column 1; selecting a center line along the radial direction of the blasting damage position of the steel tube concrete column 1, determining the blasting hole position 22 of the blasting hole 21, and installing a blasting device; detonating the blasting device to demolish the steel tube concrete column 1.
[0028] The invention discloses a method for blasting and demolishing a steel tube concrete column. The steel tube concrete column 1 is a columnar structure in which a steel tube 11 is filled with concrete 12. According to the actual height or length of the steel tube concrete column 1, the blasting destruction position required for blasting and demolishing is determined, so that less explosives can be used to make the steel tube concrete column 1 unstable, which can reduce the amount of explosives used and reduce the harmful effects of blasting. The concrete 12 of the steel tube concrete column 1 is constrained by the steel tube 11 and is difficult to be blasted and demolished. A longitudinal cutting seam 23 is arranged on the outer shell of the steel tube 11 of the steel tube concrete column 1 by oxygen welding cutting to destroy the stability of the steel tube 11, so as to facilitate the blasting and demolishing of the steel tube concrete column 1. The blasting hole position 22 of the blasting hole 21 is determined to facilitate the installation of the blasting hole blasting device and the flexible energy-gathering cutting rope 24. The blasting hole 21 is located in the concrete 12, and explosives are filled in each blasting hole 21 as the explosion source of the blasting hole blasting device. The explosives can be selected from emulsified explosives. 11, the flexible energy-gathering cutting rope 24 is installed around the outer periphery of the steel tube 11 in close contact with the steel tube 11, and at the same time, each blasting hole blasting device and each flexible energy-gathering cutting rope 24 are the same blasting net, so that the blasting of the concrete 12 and the steel tube 11 of the steel tube concrete column 1 can be completed in a controlled time, and the blasting hole 21 of the steel tube concrete column 1 is destroyed, and the concrete 12 and the steel tube 11 structure of the steel tube concrete column 1 are effectively destroyed, so that the steel tube concrete column 1 is unstable, so as to complete the demolition of the steel tube concrete column 1; in summary, the blasting demolition method of the steel tube concrete column of the present invention has low construction difficulty and short operation time, and can ensure that the steel tube concrete column is destroyed and unstable and demolished; in addition, in the construction work before blasting, the relative integrity of the steel tube concrete column is maintained, and the bearing performance of the steel tube concrete column is guaranteed, so as to avoid the instability and collapse accident in the construction process before blasting demolition, and ensure the safety of blasting demolition operation.
[0029] In some possible implementations, the blasting destruction site is located in the middle of the steel tube concrete column 1 ; the length of the blasting destruction site is 1 / 3 to 3 / 4 of the length of the steel tube concrete column 1 .
[0030] Specifically, for the steel tube concrete columns to be demolished, the two ends of the steel tube concrete columns are respectively connected to the beams or floor slabs of the upper and lower floors to give full play to the bearing characteristics of the steel tube concrete columns; the blasting damage location is determined according to the actual height or length of the steel tube concrete columns, and the blasting damage location is located in the middle of the steel tube concrete columns. When blasting, the steel tube concrete columns can be broken into multiple sections, thereby causing the steel tube concrete column structure to become unstable, and the house structure to become unstable, reducing the use of explosives during blasting, saving blasting demolition costs, and reducing the harmful effects of blasting; in addition, a number of blastholes filled with explosives and a number of flexible energy-gathering cutting ropes set at the blasting damage location will cause the explosives to break. The damaged part is divided into several small explosive units, and the length of each small explosive unit is 1 / 10 to 1 / 8 of the length of the steel tube concrete column; during the blasting process, the flexible energy-shaped cutting cable is detonated before the explosives loaded in the blasthole, so that the bearing capacity of the steel tube of the steel tube concrete column is destroyed but the bearing capacity of the concrete is maintained, so as to ensure that the blasting damaged part still retains sufficient bearing characteristics during the detonation of the flexible energy-shaped cutting cable, and reserve buffer time; the detonation of the explosives loaded in the blasthole is delayed blasting, and the explosives loaded in the blasthole are detonated 100ms after the detonation of the flexible energy-shaped cutting cable. Through the delayed blasting, it can be ensured that the concrete in the steel tube is effectively blasted when the steel tube at the blasting damaged part has been completely destroyed.
[0031] In some possible implementations, selecting a center line along the radial direction of the blasting damage site of the CFST column 1, determining the blasting hole position 22 of the blasting hole 21, and installing the blasting device specifically include: arranging a plurality of blasting loops at even intervals along the axial direction of the CFST column 1 at the blasting damage site, wherein the axis of each blasting loop is in the same straight line as the axis of the CFST column 1; determining the blasting hole position 22 along the radial center line of each blasting loop, and obtaining the hole opening position of the blasting hole 21 and the axis of the blasting hole 21; The depth of the blasthole 21 is determined, and the blasthole 21 is drilled and the blasthole blasting device is arranged; a longitudinal cutting seam 23 is arranged on the outer shell of the steel pipe 11 at the blasting damage position to destroy the local integrity of the outer shell of the steel pipe 11; a circle of flexible energy-gathering cutting ropes 24 are arranged on each of the blasting loops; wherein the center of the position of each of the blastholes 21 and a corresponding one of the flexible energy-gathering cutting ropes 24 are located on the radial plane of the same blasting loop; each of the blasthole blasting devices and each of the flexible energy-gathering cutting ropes 24 are clustered in the same detonation network.
[0032] Specifically, the steel tube concrete column is a cylindrical structure, the blasting loop is a marking line arranged along the circumferential direction of the steel tube concrete column, the blast hole position is determined along the radial center line of the blasting loop, and at the same time, the steel tube shell is cut by oxygen welding at the blast hole position to obtain the opening position of the blast hole, and the depth of the blast hole is determined according to the diameter of the steel tube concrete column, and then drilling is performed to obtain the blast hole, and explosives are loaded in the blast hole. The corresponding first detonator is connected to complete the installation of the blast hole blasting device. The explosives loaded in the blast hole are commonly used emulsion explosives; the diameter of each blast hole is 40mm~45mm The spacing between any two adjacent blast holes is 200mm-400mm, and the diameter of the explosives loaded in the blast holes is 30mm-34mm; a circle of flexible energy-gathering cutting rope is arranged on each blasting loop line to blast the steel pipe; the flexible energy-gathering cutting rope is connected with the corresponding second detonating cap, and the foot line of the first detonating cap is clustered with the foot line of the second detonating cap, so that the blast hole blasting device and the flexible energy-gathering cutting rope form a detonation network, and the flexible energy-gathering cutting rope is detonated 100ms before the explosives in the blast hole to destroy the local overall stability of the steel pipe, and then the explosives in the blast hole are detonated, thereby The concrete structure retained after the flexible energy-gathering cutting cable is detonated is destroyed, so that the steel tube concrete soil column is destroyed and unstable, and the demolition operation is completed. Among them, the jet of explosion products generated when the flexible energy-gathering cutting cable is detonated cuts the steel pipe, so that the steel pipe is reliably broken. Under the synchronous action of the flexible energy-gathering cutting blasting and the drilling blasting, the steel tube concrete column is broken and unstable in multiple sections, and the demolition operation is finally completed. When the flexible energy-gathering cutting cable is installed on the steel pipe, the thickness data of the steel pipe and the selected material parameters can be used to determine the opening angle of the flexible energy-gathering cutting cable and the The amount of explosives loaded in the accommodation space, the size parameters of the flexible shaped-energy cutting rope, the setting position and the setting quantity, etc., determine the jet pressure generated by the flexible shaped-energy cutting rope to ensure its cutting effect on the steel pipe; the opening angle of the flexible shaped-energy cutting rope should be greater than 60° and less than 120° to generate two detonation wave fronts with an angle greater than 60° and less than 120°. With this arrangement, when the two detonation wave fronts with an angle less than 120° collide with each other, oblique reflection or even Mach reflection will occur, thereby enhancing the power of the explosives loaded in the accommodation space and improving the cutting effect on the steel pipe.
[0033] In some possible implementations, the longitudinal cutting seams 23 are arranged on the outer shell of the steel pipe 11 at the blasting destruction site, specifically including: a plurality of groups of first longitudinal cutting seams 231 and a plurality of groups of second longitudinal cutting seams 232 are arranged at intervals along the axial direction of the steel tube concrete column 1 on the outer shell of the steel pipe 11 at the blasting destruction site, and any adjacent group of the first longitudinal cutting seams 231 and the second longitudinal cutting seams 232 are staggered; each group of the first longitudinal cutting seams 231 connects the nth blasting loop with the n+2th blasting loop, and each group of the second longitudinal cutting seams 232 connects the n-1th blasting loop with the n+1th blasting loop.
[0034] Specifically, the role of the longitudinal cutting seam is to destroy the local integrity of the thin wall of the steel pipe; a plurality of groups of first longitudinal cutting seams and a plurality of groups of second longitudinal cutting seams are arranged at intervals, that is, each group of first longitudinal cutting seams has a second longitudinal cutting seam adjacent to it, and any adjacent group of first longitudinal cutting seams and a group of second longitudinal cutting seams are staggered, that is, any first longitudinal cutting seam of any adjacent group of first longitudinal cutting seams and any second longitudinal cutting seam of a group of second longitudinal cutting seams are not on a straight line, each group of first longitudinal cutting seams connects the nth blasting loop line with the n+2th blasting loop line, that is, each group of first longitudinal cutting seams passes through the n+1th blasting loop line but does not pass through the nth blasting loop line and the The n+2 blasting loop, but runs through the n blasting loop, the n+1 blasting loop, the blasting loop and the n+2 blasting loop. Similarly, each group of second longitudinal cutting seams connects the n-1 blasting loop and the n+1 blasting loop, that is, each group of second longitudinal cutting seams passes through the n blasting loop but does not pass through the n-1 blasting loop and the n+1 blasting loop, but runs through the n-1 blasting loop, the n blasting loop, the blasting loop and the n+1 blasting loop. The setting of the first longitudinal cutting seam and the second longitudinal cutting seam can further destroy the local integrity of the thin wall of the steel pipe, but does not destroy the stability of the steel pipe, and retains the supporting effect of the steel pipe concrete column on the house structure before detonation.
[0035] In some possible implementations, each group of the first longitudinal cutting seams 231 includes three first longitudinal cutting seams 231, the three first longitudinal cutting seams 231 are opened along the circumferential direction of the steel tube concrete column 1, each of the first longitudinal cutting seams 231 is perpendicular to the radial plane of any connected blasting loop line, and the triangle formed by the lines connecting the intersection points of the three first longitudinal cutting seams 231 on the radial plane of the same blasting loop line is a first isosceles triangle, and the maximum angle of the first isosceles triangle is 120 degrees; each group of the second longitudinal cutting seams 232 includes three second longitudinal cutting seams 232, the three second longitudinal cutting seams 232 are opened along the circumferential direction of the steel tube concrete column 1, and each of the second longitudinal cutting seams 232 is perpendicular to any connected In the radial plane of the blasting loop, the triangle formed by the lines connecting the intersection points of the three second longitudinal cutting seams 232 on the same radial plane of the blasting loop is a second isosceles triangle, and the maximum angle of the second isosceles triangle is 120 degrees; each of the first longitudinal cutting seams 231 and each of the second longitudinal cutting seams 232 are staggered; the center line of the first isosceles triangle formed by the three first longitudinal cutting seams 231 of each group of the first longitudinal cutting seams 231 is located on the cross section of the blast hole 21 corresponding to the radial plane of any connected blasting loop, and the center line of the second isosceles triangle formed by the three second longitudinal cutting seams 232 of each group of the second longitudinal cutting seams 232 is located on the cross section of the blast hole 21 corresponding to the radial plane of any connected blasting loop.
[0036] Specifically, the steel pipe has a constraining effect on the concrete, which makes the concrete in a complex stress state and improves all aspects of the concrete performance. The concrete around the blasthole is completely under the tight action of the steel pipe, which makes the concrete in a three-dimensional stress state. The deformation of the concrete around the blasthole position under the continuous action of pressure is greater than the diameter expansion deformation of the steel pipe, so that the local stability is enhanced; a first longitudinal cutting seam and a second longitudinal cutting seam are set, and the center lines of the first isosceles triangle and the second isosceles triangle respectively formed by the first longitudinal cutting seam and the second longitudinal cutting seam are located on the cross section of the blasthole corresponding to the blasting loop passed through, which destroys the local integrity of the steel pipe and avoids the problem of the concrete being difficult to destroy; in addition, each group of first longitudinal cutting seams and each group of second longitudinal cutting seams are three, and each first longitudinal cutting seam is staggered with any adjacent second longitudinal cutting seam, which can ensure that the steel tube concrete column still has sufficient bearing capacity before detonation during construction; flexible energy-gathering cutting The cutting rope includes a flexible energy-gathering shell 241 and a charge liner 242. A storage space is formed between the flexible energy-gathering shell 241 and the charge liner 242. The storage space is used to load explosives. The second detonating cap is connected to the explosives. The structure formed by the flexible energy-gathering shell 241 and the charge liner 242 is a conical structure, so that a conical space, namely, an energy-gathering hole 243, is formed outside the charge liner 242. When the flexible energy-gathering cutting rope is arranged on the steel pipe shell, the energy-gathering hole 243 faces the steel pipe. A confined space is formed between the steel pipe and the steel pipe, so that a gathering effect is formed during the detonation process; during the blasting process of the flexible gathering cutting rope, the explosive in the accommodating space explodes. Under the gathering effect, the explosive and the confined space form a detonation to generate a jet and a metal jet, which jointly cut the steel pipe to break it. At the same time, the setting of the first longitudinal cutting seam and the second longitudinal cutting seam causes the explosive in the accommodating space to form a detonation to generate a jet and a metal jet with the first longitudinal cutting seam and the second longitudinal cutting seam, thereby further improving the cutting and blasting effect on the steel pipe.
[0037] In some possible implementations, obtaining the opening position of the blast hole 21 specifically includes: at the blast hole position determined on the blasting loop, cutting the outer shell of the steel pipe 11 at the blasting damage portion by oxy welding to obtain the opening position of the blast hole 21; the depth of the blast hole 21 is 2 / 3 of the diameter of the steel tube concrete column 1.
[0038] Specifically, the steel pipe shell at the blasting damage site is cut by oxygen welding to expose the concrete site, blast holes are drilled in the concrete site, and blast hole blasting devices are installed to achieve blasting of the concrete; the blast holes are arranged on the same side of the steel tube concrete column, and the depth of the blast holes is 2 / 3 of the diameter of the steel tube concrete column, which can effectively destroy the stability of the steel tube concrete column during the blasting process and achieve the purpose of dismantling the steel tube concrete column.
[0039] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.
Claims
1. A method for demolishing a steel tube concrete column by blasting, characterized in that: The blasting demolition method of the steel tube concrete column comprises: Determining the blasting destruction position of the steel tube concrete column according to the length of the steel tube concrete column; Selecting a center line along the radial direction of the blasting damage part of the steel tube concrete column, determining the blast hole position, and installing a blasting device; The blasting device is detonated to demolish the steel tube concrete column.
2. The method for demolishing a steel tube concrete column by blasting as claimed in claim 1, characterized in that: The blasting destruction site is located in the middle of the steel tube concrete column; the length of the blasting destruction site is 1 / 3 to 3 / 4 of the length of the steel tube concrete column.
3. A method for demolishing a steel tube concrete column by blasting as claimed in claim 2, characterized in that: The steps of selecting a center line along the radial direction of the blasting damage part of the steel tube concrete column, determining the blast hole position, and installing the blasting device specifically include: A plurality of blasting loops are evenly spaced along the axial direction of the steel tube concrete column at the blasting destruction site, and the axis of each blasting loop is in the same straight line as the axis of the steel tube concrete column; Determine the position of the blasthole along the radial center line of each blasting loop, obtain the opening position and depth of the blasthole, drill the blasthole and arrange the blasthole blasting device; Arranging longitudinal cutting seams on the outer shell of the steel pipe at the blasting destruction position to destroy the local integrity of the outer shell of the steel pipe; A circle of flexible energy-gathering cutting rope is laid on each of the blasting loops; Among them, the center of each blast hole position and a corresponding flexible energy-gathering cutting rope are located on the same radial plane of the blasting loop; each blast hole blasting device and each flexible energy-gathering cutting rope form a clustered and connected same detonation network.
4. A method for demolishing a steel tube concrete column by blasting as claimed in claim 3, characterized in that: The method of arranging longitudinal cutting seams on the steel tube shell at the blasting destruction location specifically includes: arranging a plurality of groups of first longitudinal cutting seams and a plurality of groups of second longitudinal cutting seams at intervals along the axial direction of the steel tube concrete column at the steel tube shell at the blasting destruction location, and staggering the seams between any adjacent group of the first longitudinal cutting seams and any adjacent group of the second longitudinal cutting seams; each group of the first longitudinal cutting seams connects the nth blasting loop line with the n+2th blasting loop line, and each group of the second longitudinal cutting seams connects the n-1th blasting loop line with the n+1th blasting loop line.
5. The method for demolishing a steel tube concrete column by blasting as claimed in claim 4, characterized in that: Each group of the first longitudinal cutting seams includes three first longitudinal cutting seams, and the three first longitudinal cutting seams are opened along the circumferential direction of the steel tube concrete column. Each of the first longitudinal cutting seams is perpendicular to the radial plane of any connected blasting loop line. The triangle formed by the lines connecting the intersection points of the three first longitudinal cutting seams on the radial plane of the same blasting loop line is a first isosceles triangle, and the maximum angle of the first isosceles triangle is 120 degrees.
6. The method for demolishing a steel tube concrete column by blasting as claimed in claim 4, characterized in that: Each group of the second longitudinal cutting seams includes three second longitudinal cutting seams, and the three second longitudinal cutting seams are opened along the circumferential direction of the steel tube concrete column. Each of the second longitudinal cutting seams is perpendicular to the radial plane of any connected blasting loop line. The triangle formed by the lines connecting the intersection points of the three second longitudinal cutting seams on the radial plane of the same blasting loop line is a second isosceles triangle, and the maximum angle of the second isosceles triangle is 120 degrees.
7. A method for demolishing a steel tube concrete column by blasting as claimed in claims 5 and 6, characterized in that: Each of the first longitudinal cutting seams and each of the second longitudinal cutting seams are staggered.
8. The method for demolishing a steel tube concrete column by blasting as claimed in claim 3, characterized in that: Acquiring the opening position of the blasthole specifically includes: at the blasthole position determined on the blasting loop, cutting the steel pipe shell at the blasting damage portion by oxy welding to obtain the opening position of the blasthole.
9. A method for demolishing a steel tube concrete column by blasting as claimed in claim 8, characterized in that: The depth of the blasthole is 2 / 3 of the diameter of the steel tube concrete column.
10. The method for demolishing a steel tube concrete column by blasting as claimed in claim 7, characterized in that: The center line of the first isosceles triangle formed by the three first longitudinal cutting seams in each group of the first longitudinal cutting seams is located on the cross-section of the blast hole corresponding to the radial plane of any connected blasting loop line, and the center line of the second isosceles triangle formed by the three second longitudinal cutting seams in each group of the second longitudinal cutting seams is located on the cross-section of the blast hole corresponding to the radial plane of any connected blasting loop line.