CN109113369B - Safe demolition method for manual demolition of cylindrical building - Google Patents
Safe demolition method for manual demolition of cylindrical building Download PDFInfo
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- CN109113369B CN109113369B CN201811164199.6A CN201811164199A CN109113369B CN 109113369 B CN109113369 B CN 109113369B CN 201811164199 A CN201811164199 A CN 201811164199A CN 109113369 B CN109113369 B CN 109113369B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
- E04G2023/087—Wrecking of buildings of chimneys, smoke stacks or the like
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Abstract
The invention creatively discloses a safe demolition method for manual demolition of a cylindrical building, which comprises the following steps: the method comprises the steps of obtaining size parameters of the cylindrical building, installing a hanging lifting mechanism, installing and dismantling a construction platform, installing a safety protection platform, downwards dismantling a wall body between two adjacent U-shaped buckling plates to form a U-shaped notch, dismantling a residual wall body between two adjacent U-shaped notches, keeping the dismantling construction platform and the safety protection platform to descend synchronously by using a chain block, and mechanically dismantling the bottom. According to the safe dismantling method, the chain block can be quickly installed on the edge of the upper opening of the cylindrical building through the hanging chain by using the U-shaped buckle plate, the wall chiseling is not needed to search for the internal hoop reinforcing steel bar of the cylindrical building during installation, the U-shaped buckle plate is directly buckled to the position of the hoop reinforcing steel bar, and the integral structural strength is higher; utilize the safety protection platform to hang in the below of demolising construction platform, can play better safety protection effect, and can prevent that the rubble from falling from the outside.
Description
Technical Field
The invention relates to a safe demolition method in building demolition construction, in particular to a safe demolition method for manual demolition of a cylindrical building.
Background
At present, when a chimney or a water tower building is dismantled, the following methods are generally adopted: blasting demolition, mechanical demolition, integral laying-down demolition and manual demolition. However, the manual dismantling method is still common under the conditions of site limitation or harm to other surrounding buildings and equipment environments, and the like, and the method is low in use cost, safe, environment-friendly and less in harm.
However, at present, no proper scaffold for manual demolition can meet the requirement of high-altitude demolition, if a fastener type scaffold or an existing suspended scaffold is adopted, the construction cost is high, and the construction safety is difficult to guarantee, so that a safe demolition method for manual demolition of a cylindrical building is needed to be designed, the requirement of manual demolition of ultrahigh buildings such as a chimney and a water tower can be met, and the demolition safety is high.
Disclosure of Invention
The invention has the following aims: the safe demolition method for manual demolition of the cylindrical building is provided, can meet the manual demolition requirements of ultrahigh buildings such as a chimney and a water tower, and has high demolition safety.
The technical scheme is as follows: the invention creates a safe demolition method for manual demolition of a cylindrical building, which comprises the following steps:
step 4, installing a safety protection platform below the demolition construction platform, wherein the safety protection platform is an annular platform, firstly calculating the radius of an inner ring of the safety protection platform according to the suspension height of the safety protection platform and the taper of the cylindrical building, so as to determine to assemble and install the safety protection platform with the corresponding size, and finally hanging the safety protection platform below the demolition construction platform through four connecting steel wire ropes;
and 8, after the demolition construction platform is lowered to the next demolition construction height, repeating the steps 5-7 until the cylindrical building is demolished from top to bottom.
Furthermore, the demolition construction platform and the safety protection platform are both composed of an annular beam, a platform unit plate, a bottom support frame and a protection fence; the inner side edges of the platform unit plates are installed on the annular beam in a buckling mode, and the bottom supporting frames are correspondingly installed on the lower sides of the platform unit plates; the platform unit plates are spliced to form an annular table top for dismantling the construction platform and the safety protection platform; each bottom support frame is used for obliquely supporting on the outer side wall of the cylindrical building; the protective fence is vertically arranged at the edge of the outer side of the annular table top.
Furthermore, the annular beam is formed by butt-joint installation of four arc-shaped cross beams and 4N arc-shaped short beams; n is a natural number greater than 0; butt joint mounting plates are arranged at two ends of the arc-shaped crossbeam and the arc-shaped short beam, and reinforcing rib plates are arranged at the butt joint mounting plates; the butt joint mounting plate is provided with a butt joint mounting hole; the four arc-shaped girders are positioned at the quartering points of the annular beam; two butt joint mounting plates at adjacent positions are in butt joint installation by penetrating through the butt joint mounting holes through butt joint bolts; angle steels are arranged on the outer side surfaces of the arc-shaped crossbeam and the arc-shaped short beam at intervals, and the angle steels and the outer side surfaces form triangular vertical insertion holes.
Furthermore, the platform unit plate consists of a trapezoidal frame, a transverse rib, a longitudinal rib and two inserted bending rods; the trapezoidal frame is of an isosceles trapezoid structure, and the transverse ribs and the longitudinal ribs are respectively distributed on the trapezoidal frame in a transverse and longitudinal manner to form a supporting surface; two fixing and mounting holes are formed in the inner side frame of the trapezoidal frame; the inserted bending rod is formed by sequentially bending a welding section, an installation section and an inserted section into a whole, the installation section is perpendicular to the welding section, and the inserted section is perpendicular to the welding section and the installation section; the mounting sections of the two inserted bending rods respectively penetrate through the two fixed mounting holes; the welding section is fixedly arranged on the inner side surface of the inner side frame of the trapezoidal frame, and the inserting section extends out of the inner side frame of the trapezoidal frame and is vertical to the supporting surface; the inserting section is vertically inserted into the triangular vertical inserting hole, and the peripheral outer wall of the inserting section is tangent to the inner walls of three sides of the triangular vertical inserting hole.
Further, the bottom bracing frame comprises a vertical bracing bar and an inclined bracing bar; the lower end of the inclined support rod is obliquely arranged in the middle of the vertical support rod; the lower end part of the vertical stay bar is provided with an inclined slope surface used for being supported on the outer side wall of the cylindrical building; a vertical butt joint rod and an inclined butt joint rod are arranged on the lower sides of the waist frames on the two sides of the trapezoidal frame; waist-shaped butt joint holes are formed in the upper end of the vertical stay bar, the upper end of the inclined stay bar, the lower end of the vertical butt joint bar and the lower end of the inclined butt joint bar; the upper end of the vertical stay bar and the lower end of the vertical butt joint rod are fixedly installed by penetrating through the waist-shaped butt joint hole through a fixing bolt; the upper end of the inclined stay bar and the lower end of the inclined butt joint bar are fixedly installed by penetrating a waist-shaped butt joint hole through a fixing bolt.
Furthermore, the protective fence is composed of a rectangular frame, a protective net and diagonal draw bars; the lower side of the rectangular frame is fixedly arranged on the outer side frame of the trapezoidal frame; the protective net is arranged on the rectangular frame; the lower end of the diagonal draw bar is arranged on the trapezoidal frame, and the lower end of the diagonal draw bar is obliquely arranged on the rectangular frame.
Furthermore, a connecting seat is arranged in the middle of the outer side surface of the arc-shaped girder; a steel rope hole is arranged on the connecting seat; the lower end of the suspension steel wire rope is fixed on the steel wire rope hole; a triangular rib plate is arranged at the mounting position of the connecting seat and the outer side surface of the arc-shaped girder; an adjusting plate is arranged in the middle of the upper side face of the arc-shaped girder, and an adjusting threaded hole is formed in the adjusting plate; an adjusting screw is screwed on the adjusting threaded hole in a threaded manner; an adjusting supporting plate is vertically arranged at the inner end of the adjusting screw rod, and an adjusting crank is arranged at the outer end of the adjusting screw rod.
Furthermore, a safety connecting seat is arranged at the upper part of the U-shaped buckle plate, and a steel rope mounting hole is formed in the safety connecting seat; a protective steel wire rope is arranged in each of the steel wire rope mounting holes of the four safety connecting seats in a penetrating manner; the inner end parts of the four protective steel wire ropes are fixedly arranged on the same mounting disc; and the outer end parts of the four protective steel wire ropes are respectively provided with a steel wire rope buckle, and the steel wire rope buckles are larger than the aperture of the steel wire rope mounting hole.
Furthermore, a fastening threaded hole and an upper mounting seat are arranged on the outer side surface of the U-shaped buckle plate; a fastening threaded rod is screwed on the fastening threaded hole in a threaded manner; a fastening crank is arranged at the outer end part of the fastening threaded rod; a fastening pressing plate for pressing the outer side wall of the cylindrical building is arranged at the inner end part of the fastening threaded rod; the upper end of the suspension chain is fixedly arranged on the upper mounting seat.
Furthermore, a connecting rod is vertically arranged on the arc-shaped girder; the upper end of the connecting rod is provided with a waist-shaped steel rope hole; a safety steel wire rope which surrounds the outer side wall of the cylindrical building is arranged in the waist-shaped steel wire rope hole in a penetrating mode; the safety steel wire rope is provided with a steel ring.
Compared with the prior art, the invention has the beneficial effects that: the chain block can be quickly installed on the edge of the upper opening of the cylindrical building through the hanging chain by utilizing the U-shaped buckle plate, and the wall chiseling is not needed to search for the internal hoop reinforcing steel bar of the cylindrical building during installation, because the U-shaped buckle plate can be completely and directly buckled to the position of the hoop reinforcing steel bar, and the integral structural strength is higher; the safety protection platform is hung below the demolition construction platform, so that a better safety protection effect can be achieved, and broken stones can be prevented from falling from the outer side; the lifting adjustment of the construction platform can be realized by using the chain block, and the construction efficiency is higher.
Drawings
FIG. 1 is a flow chart of the inventive method;
FIG. 2 is a schematic view of a partial installation structure created by the present invention;
FIG. 3 is a schematic view of the installation structure of the safety steel wire rope of the present invention;
FIG. 4 is a schematic view of the installation structure of the arched girder and the suspension lifting mechanism of the present invention;
FIG. 5 is a schematic view of a local installation structure of the demolition construction platform created by the present invention;
FIG. 6 is a schematic view of the structure of the arc-shaped short beam created by the present invention;
fig. 7 is a schematic diagram of the structure of the platform unit board created by the present invention.
Detailed Description
The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
Example 1:
as shown in fig. 1-7, the present invention creatively discloses a safe demolition method for manual demolition of cylindrical buildings, which comprises the following steps:
step 4, installing a safety protection platform below the demolition construction platform, wherein the safety protection platform is an annular platform, firstly calculating the radius of an inner ring of the safety protection platform according to the suspension height of the safety protection platform and the taper of the cylindrical building 42, so as to determine to assemble and install the safety protection platform with the corresponding size, and finally suspending the safety protection platform below the demolition construction platform through four link steel wire ropes 5;
and 8, after the demolition construction platform is lowered to the next demolition construction height, repeating the steps 5-7 to realize the demolition of the cylindrical building 42 from top to bottom, and finally completing the demolition of the bottom of the cylindrical building 42 by a machine when the cylindrical building 42 is demolished to the height which can be mechanically disassembled.
According to the method, the chain block 16 can be quickly installed on the edge of the upper opening of the cylindrical building 42 through the hanging chain 17 by utilizing the U-shaped buckle plate 18, the wall chiseling is not needed to search for the internal hoop reinforcement of the cylindrical building 42 during installation, the U-shaped buckle plate 18 can be completely and directly buckled to the position of the hoop reinforcement, and the overall structural strength is higher; the safety protection platform is hung below the demolition construction platform, so that a better safety protection effect can be achieved, and broken stones can be prevented from falling from the outer side; the lifting adjustment of the construction platform can be realized by using the chain block 16, and the construction efficiency is higher.
Furthermore, the demolition construction platform and the safety protection platform are both composed of an annular beam, a platform unit plate, a bottom support frame and a protection fence; the inner side edges of the platform unit plates are installed on the annular beam in a buckling mode, and the bottom supporting frames are correspondingly installed on the lower sides of the platform unit plates; the platform unit plates are spliced to form an annular table top for dismantling the construction platform and the safety protection platform; each bottom support frame is used for being obliquely supported on the outer side wall of the cylindrical building 42; the protective fence is vertically arranged at the edge of the outer side of the annular table top.
Furthermore, the annular beam is formed by butt-joint installation of four arc-shaped cross beams 1 and 4N arc-shaped short beams 2; n is a natural number greater than 0; the two ends of the arc-shaped crossbeam 1 and the arc-shaped short beam 2 are respectively provided with a butt joint mounting plate 29, and a reinforcing rib plate 30 is arranged at the butt joint mounting plate 29; the butt joint mounting plate 29 is provided with a butt joint mounting hole; the four arc-shaped girders 1 are positioned at the quartering points of the annular beam; two abutting mounting plates 29 at adjacent positions are butted and mounted by penetrating through the abutting mounting holes through abutting bolts; angle steel 3 is arranged on the outer side surfaces of the arc-shaped crossbeam 1 and the arc-shaped short beam 2 at intervals, and the angle steel 3 and the outer side surfaces form triangular vertical insertion holes. The method comprises the following steps that four arc-shaped cross beams 1 and 4N arc-shaped short beams 2 are installed in a butt joint mode, the requirement for dismantling a cylindrical building 42 with a cone-shaped structure from top to bottom can be met, the arc-shaped short beams 2 with corresponding quantity are increased according to the diameter of a ring beam in the dismantling process, if the arc-shaped short beams 2 need to be increased in the descending process, the arc-shaped short beams 2 are additionally installed at corresponding positions, a platform unit plate is installed on the arc-shaped short beams 2, and a bottom supporting frame and a protective fence are installed on the platform unit plate; utilize angle steel 3 and arc roof beam lateral surface to constitute triangular vertical cartridge hole, have better structural strength, and can buckle pole 10 to the cartridge and carry out effective spacing, prevent to take place to rock after the cartridge.
Furthermore, the platform unit plate comprises a trapezoidal frame 8, a transverse rib 32, a longitudinal rib 31 and two inserted bending rods 10; the trapezoid frame 8 is of an isosceles trapezoid structure, and the transverse ribs 32 and the longitudinal ribs 31 are respectively distributed on the trapezoid frame 8 in the transverse direction and the longitudinal direction to form a supporting surface; two fixed mounting holes 33 are arranged on the inner side frame of the trapezoidal frame 8; the inserted bending rod 10 is formed by sequentially bending a welding section 34, an installation section 35 and an inserted section 36 into a whole, the installation section 35 is perpendicular to the welding section 34, and the inserted section 36 is perpendicular to the welding section 34 and the installation section 35; the mounting sections 35 of the two inserted bending rods 10 respectively penetrate through the two fixed mounting holes 33; the welding section 34 is fixedly arranged on the inner side surface of the inner side frame of the trapezoidal frame 8, and the insertion section 36 extends out of the inner side frame of the trapezoidal frame 8 and is vertical to the supporting surface; the inserting section 36 is vertically inserted into the triangular vertical inserting hole, and the peripheral outer wall of the inserting section 36 is tangent to the inner walls of three sides of the triangular vertical inserting hole. Utilize welding segment 34, installation section 35 and insertion section 36 buckle integrated into one piece in proper order and constitute insertion and buckle pole 10, not only ensure the overall structure intensity of insertion and buckle pole 10, utilize welding segment 34 moreover, the design of mutually perpendicular can be ensured between installation section 35 and the insertion section 36 with the fixed fastness of trapezoidal frame 8, the danger of separation can not appear droing, and utilize welding segment 34 can enough realize the welded mounting, can locate to realize again at fixed mounting hole 33 and block, ensure not to be extracted the separation, very high buckle security and reliability have.
Further, the bottom support frame comprises a vertical stay bar 12 and an inclined stay bar 11; the lower end of the inclined stay bar 11 is obliquely arranged in the middle of the vertical stay bar 12; the lower end part of the vertical brace 12 is provided with an inclined slope 28 for supporting on the outer side wall of the cylindrical building 42; a vertical butt joint rod 25 and an inclined butt joint rod 26 are arranged on the lower sides of the waist frames on the two sides of the trapezoidal frame 8; waist-shaped butt joint holes 27 are formed in the upper end of the vertical stay bar 12, the upper end of the inclined stay bar 11, the lower end of the vertical butt joint bar 25 and the lower end of the inclined butt joint bar 26; the upper end of the vertical stay bar 12 and the lower end of the vertical butt joint bar 25 are fixedly installed by penetrating a waist-shaped butt joint hole 27 through a fixing bolt; the upper end of the inclined stay bar 11 and the lower end of the inclined butt-joint bar 26 are fixedly installed through a waist-shaped butt-joint hole 27 by a fixing bolt. The butt-joint installation of the bottom support frame and the platform unit plate can facilitate the turnover transportation after disassembly, and the inclined slope surface 28 can facilitate the inclined support of the bottom support frame on the outer side wall of the cylindrical building 42.
Further, the protective fence is composed of a rectangular frame 9, a protective net and a diagonal draw bar 24; the lower side of the rectangular frame 9 is fixedly arranged on the outer side frame of the trapezoidal frame 8; the protective net is arranged on the rectangular frame 9; the lower end of the diagonal draw bar 24 is arranged on the trapezoidal frame 8, and the lower end is obliquely arranged on the rectangular frame 9. Peripheral protection of the platform can be achieved by using the protective fence.
Furthermore, a connecting seat 4 is arranged in the middle of the outer side surface of the arc-shaped girder 1; a steel rope hole 39 is arranged on the connecting seat 4; the lower end of the suspension steel wire rope 15 is fixed on the steel wire rope hole 39; a triangular rib plate 40 is arranged at the mounting position of the connecting seat 4 and the outer side surface of the arc-shaped girder 1; an adjusting plate 13 is arranged in the middle of the upper side face of the arc-shaped girder 1, and an adjusting threaded hole is formed in the adjusting plate 13; an adjusting screw 37 is screwed on the adjusting threaded hole; an adjusting supporting plate 38 is vertically installed on the inner end of the adjusting screw rod 37, and an adjusting crank 14 is arranged on the outer end of the adjusting screw rod 37. An interval adjusting mechanism is formed by the adjusting screw 37, the adjusting plate 13 and the adjusting crank 14, so that the support and the interval adjustment of the annular beam and the outer side wall of the cylindrical building 42 are realized, the stability of the annular beam after installation is ensured, and the annular beam cannot shake or incline.
Further, a safety connecting seat 20 is arranged at the upper part of the U-shaped buckle plate 18, and a steel rope mounting hole is formed in the safety connecting seat 20; a protective steel wire rope 21 is arranged in each of the steel wire rope mounting holes of the four safety connecting seats 20; the inner end parts of the four protective steel wire ropes 21 are all fixedly arranged on the same mounting disc 43; the outer end parts of the four protective steel wire ropes 21 are respectively provided with a steel wire rope buckle 22, and the steel wire rope buckles 22 are larger than the aperture of the steel rope mounting hole. The protective steel wire rope 21 is in a non-tight state in an initial state and is in a tight state when the U-shaped buckle plate 18 is taken down and the buckle is installed on the lower edge of the U-shaped notch; utilize four protection wire ropes 21, installation disc 43, safety connection seat 20 and wire rope to detain 22 and constitute top protection machanism, can form a crisscross pulling structure at the top of cylindrical building 42, even can not appear dismantling the construction platform when one or more U-shaped buckle 18 appears droing and fall, ensure to dismantle the personnel's safety on the construction platform.
Furthermore, a fastening threaded hole and an upper mounting seat 41 are arranged on the outer side surface of the U-shaped buckle plate 18; a fastening threaded rod 23 is screwed on the fastening threaded hole; a fastening crank 19 is arranged at the outer end part of the fastening threaded rod 23; a fastening pressing plate for pressing on the outer side wall of the cylindrical building 42 is arranged on the inner end part of the fastening threaded rod 23; the upper end of the suspension chain 17 is fixedly mounted on the upper mounting seat 41. The fastening screw rod 23, the fastening crank 19 and the fastening pressing plate form a fastening mechanism, so that the U-shaped buckle plate 18 is fixedly installed, and the U-shaped buckle plate 18 is prevented from falling off.
Further, a connecting rod 44 is vertically arranged on the arc-shaped girder 1; the upper end of the connecting rod 44 is provided with a waist-shaped steel rope hole; a safety steel wire rope 6 which surrounds the outer side wall of the cylindrical building 42 in a circle is arranged in the waist-shaped steel wire rope hole in a penetrating mode; a steel ring 7 is arranged on the safety steel wire rope 6. By utilizing the design of the safety steel wire rope 6 and the steel ring 7, the further safety protection can be performed on constructors.
When the dismantling construction platform, the safety protection platform and the suspension lifting mechanism used in the safety dismantling method for manual dismantling of the cylindrical building are installed, firstly, four U-shaped buckle plates 18 are buckled at four equal points of the edge of the upper opening of the cylindrical building 42, a fastening press plate is pressed on the outer side wall of the cylindrical building 42 by shaking a fastening crank 19, then four protection steel wire ropes 21 are installed, and the outer end parts of the four protection steel wire ropes 21 are locked and fixed by using steel wire rope buckles 22; then, a chain block 16 is installed, and the chain block is installed on the upper installation base 41 through a hanging chain 17; then, four arc-shaped girders 1 are installed, the four arc-shaped girders are hung on a hoisting chain of a chain block 16 by using hanging steel wire ropes 15, a corresponding number of arc-shaped short beams 2 are installed among the four arc-shaped girders 1, and the butt joint installation among the arc-shaped beams is realized by using a butt joint installation plate 29 and butt joint bolts, so that annular beams for dismantling a construction platform are formed, and the number of the arc-shaped short beams 2 is required to be increased step by step in the downward dismantling construction process because the cylindrical building 42 is of a conical cylindrical structure; then, four arc-shaped girders 1 of four safety protection platforms are hung below the annular beam for dismantling the construction platform through four link steel wire ropes 5, and then arc-shaped short beams 2 with corresponding quantity are installed among the four arc-shaped girders 1 to form the annular beam of the safety protection platform; then the bottom support frame and the protective fence are installed on the platform unit plates, the platform unit plates are installed on the upper and lower annular beams, the inserting section 36 is vertically inserted into the triangular vertical inserting hole, the inclined slope 28 on the bottom support frame is supported on the outer side wall of the cylindrical building 42, and after the installation of each platform unit plate is finished, the assembly of the demolition construction platform and the safety protection platform is completed; then, a safety steel wire rope 6 is installed, so that the safety rope of a constructor is buckled on the steel ring 7.
As mentioned above, although the invention has been shown and described with reference to certain preferred embodiments, it should not be construed as being limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A safe demolition method for manual demolition of a cylindrical building, comprising the steps of:
step 1, measuring or inquiring size parameters of a cylindrical building (42) to be dismantled, wherein the size parameters comprise a bottom outer diameter, a bottom inner diameter, a top outer diameter, a top inner diameter and an overall height, determining the height position of hoop reinforcement inside the cylindrical building (42), calculating the taper of the cylindrical building (42) according to the top outer diameter, the bottom outer diameter and the overall height, and calculating the top wall thickness and the bottom wall thickness of the cylindrical building (42) according to the bottom outer diameter, the bottom inner diameter, the top outer diameter and the top inner diameter;
step 2, a hanging lifting mechanism is installed at the top of the cylindrical building (42), the hanging lifting mechanism consists of four hanging lifting units, each hanging lifting unit comprises a U-shaped buckle plate (18), a hanging chain (17), a chain block (16) and a hanging steel wire rope (15), the U-shaped buckle plate (18) with a proper opening size is selected according to the wall thickness of the top and the wall thickness of the bottom of the cylindrical building (42), the four U-shaped buckle plates (18) with the corresponding sizes are respectively buckled at four equal dividing points of the edge of the upper opening of the cylindrical building (42), the chain block (16) is hung and installed on the U-shaped buckle plate (18) through the hanging chain (17), and finally the hoisting chain of the chain block (16) is fixedly connected with the upper end of the hanging steel wire rope (15);
step 3, hanging, installing and dismantling a construction platform below the suspension lifting mechanism, wherein the dismantling construction platform is an annular platform, firstly, the radius of an inner ring of the dismantling construction platform is calculated according to the hanging height of the dismantling construction platform and the taper of the cylindrical building (42), so that the dismantling construction platform with the corresponding size is determined to be assembled and installed, then, the lower end of a hanging steel wire rope (15) is fixedly connected to the dismantling construction platform, and finally, four chain blocks (16) are adjusted to enable the dismantling construction platform to be in a horizontal state;
step 4, installing a safety protection platform below the demolition construction platform, wherein the safety protection platform is an annular platform, firstly calculating the radius of an inner ring of the safety protection platform according to the suspension height of the safety protection platform and the taper of the cylindrical building (42), so as to determine the safety protection platform with the corresponding size to be assembled and installed, and finally hanging the safety protection platform below the demolition construction platform through four link steel wire ropes (5);
step 5, downwards removing a wall body of the cylindrical building (42) between two adjacent U-shaped buckling plates (18) to form a U-shaped notch, taking down a U-shaped buckling plate (18) close to the U-shaped notch, installing a buckle on the lower edge of the U-shaped notch, and pulling a hand-pulled gourd (16) to pull a hanging steel wire rope (15) to pull the construction platform to be tightened again;
step 6, repeating the step 5, gradually and downwards removing the wall body of the cylindrical building (42) between two adjacent U-shaped buckle plates (18) to form a U-shaped notch, and installing the other three U-shaped buckle plates (18) on the lower edge of the U-shaped notch at the corresponding positions;
step 7, removing the residual wall body of the cylindrical building (42) between two adjacent U-shaped notches to the same height as the U-shaped buckle plate (18), after the residual wall bodies at the four positions are removed, synchronously pulling the four chain blocks (16) to enable the construction removing platform and the safety protection platform to descend synchronously, and expanding the inner ring diameter of the construction removing platform and the safety protection platform as required in the descending process of the construction removing platform and the safety protection platform;
step 8, after the demolition construction platform is lowered to the next demolition construction height, repeating the steps 5-7 until the cylindrical building (42) is demolished from top to bottom;
the demolition construction platform and the safety protection platform are respectively composed of an annular beam, a platform unit plate, a bottom support frame and a protection fence; the inner side edges of the platform unit plates are installed on the annular beam in a buckling mode, and the bottom supporting frames are correspondingly installed on the lower sides of the platform unit plates; the platform unit plates are spliced to form an annular table top for dismantling the construction platform and the safety protection platform; each bottom support frame is used for obliquely supporting on the outer side wall of the cylindrical building (42); the protective fence is vertically arranged at the outer side edge of the annular table top;
the annular beam is formed by butt-joint installation of four arc-shaped cross beams (1) and 4N arc-shaped short beams (2); n is a natural number greater than 0; butt joint mounting plates (29) are arranged at two ends of the arc-shaped crossbeam (1) and the arc-shaped short beam (2), and reinforcing rib plates (30) are arranged at the butt joint mounting plates (29); a butt joint mounting hole is arranged on the butt joint mounting plate (29); the four arc-shaped girders (1) are positioned at the quartering points of the annular beam; two butt joint mounting plates (29) at adjacent positions are in butt joint installation by penetrating through the butt joint mounting holes through butt joint bolts; angle steel (3) are arranged on the outer side faces of the arc-shaped crossbeam (1) and the arc-shaped short beam (2) at intervals, and the angle steel (3) and the outer side faces form triangular vertical insertion holes.
2. A safe demolition method for manual demolition of cylindrical buildings according to claim 1 wherein: the platform unit plate consists of a trapezoidal frame (8), transverse ribs (32), longitudinal ribs (31) and two inserted bending rods (10); the trapezoid frame (8) is of an isosceles trapezoid structure, and the transverse ribs (32) and the longitudinal ribs (31) are respectively distributed on the trapezoid frame (8) in the transverse direction and the longitudinal direction to form a supporting surface; two fixed mounting holes (33) are arranged on the inner side frame of the trapezoidal frame (8); the inserted bending rod (10) is formed by sequentially bending a welding section (34), an installation section (35) and an inserted section (36) into a whole, the installation section (35) is vertical to the welding section (34), and the inserted section (36) is vertical to the welding section (34) and the installation section (35) at the same time; the mounting sections (35) of the two inserted bending rods (10) respectively penetrate through the two fixed mounting holes (33); the welding section (34) is fixedly arranged on the inner side surface of the inner side frame of the trapezoidal frame (8), and the inserting section (36) extends out of the inner side frame of the trapezoidal frame (8) and is vertical to the supporting surface; the inserting section (36) is vertically inserted into the triangular vertical inserting hole, and the peripheral outer wall of the inserting section (36) is tangent to the inner walls of three sides of the triangular vertical inserting hole.
3. A safe demolition method for manual demolition of cylindrical buildings according to claim 2, characterized in that: the bottom support frame comprises a vertical support rod (12) and an inclined support rod (11); the lower end of the inclined stay bar (11) is obliquely arranged in the middle of the vertical stay bar (12); the lower end part of the vertical brace rod (12) is provided with an inclined slope surface (28) used for being supported on the outer side wall of the cylindrical building (42); a vertical butt joint rod (25) and an inclined butt joint rod (26) are arranged on the lower sides of the waist frames on the two sides of the trapezoidal frame (8); waist-shaped butt joint holes (27) are formed in the upper end of the vertical stay bar (12), the upper end of the inclined stay bar (11), the lower end of the vertical butt joint bar (25) and the lower end of the inclined butt joint bar (26); the upper end of the vertical stay bar (12) and the lower end of the vertical butt joint bar (25) are fixedly installed by penetrating through a waist-shaped butt joint hole (27) through a fixing bolt; the upper end of the inclined stay bar (11) and the lower end of the inclined butt joint bar (26) are fixedly installed by penetrating a waist-shaped butt joint hole (27) through a fixing bolt.
4. A safe demolition method for manual demolition of cylindrical buildings according to claim 2, characterized in that: the protective fence is composed of a rectangular frame (9), a protective net and an inclined pull rod (24); the lower side of the rectangular frame (9) is fixedly arranged on the outer side frame of the trapezoidal frame (8); the protective net is arranged on the rectangular frame (9); the lower end of the diagonal draw bar (24) is arranged on the trapezoidal frame (8), and the lower end is obliquely arranged on the rectangular frame (9).
5. A safe demolition method for manual demolition of cylindrical buildings according to claim 1 wherein: a connecting seat (4) is arranged in the middle of the outer side surface of the arc-shaped girder (1); a steel rope hole (39) is arranged on the connecting seat (4); the lower end of the suspension steel wire rope (15) is fixed on the steel wire rope hole (39); a triangular rib plate (40) is arranged at the mounting position of the connecting seat (4) and the outer side surface of the arc-shaped girder (1); an adjusting plate (13) is arranged in the middle of the upper side face of the arc-shaped crossbeam (1), and an adjusting threaded hole is formed in the adjusting plate (13); an adjusting screw (37) is screwed on the adjusting threaded hole in a threaded manner; an adjusting supporting plate (38) is vertically arranged at the inner end of the adjusting screw rod (37), and an adjusting crank (14) is arranged at the outer end of the adjusting screw rod (37).
6. A safe demolition method for manual demolition of cylindrical buildings according to claim 1 wherein: a safety connecting seat (20) is arranged at the upper part of the U-shaped buckle plate (18), and a steel rope mounting hole is arranged on the safety connecting seat (20); a protective steel wire rope (21) is respectively arranged in the steel wire rope mounting holes of the four safety connecting seats (20) in a penetrating way; the inner end parts of the four protective steel wire ropes (21) are all fixedly arranged on the same mounting disc (43); the outer end parts of the four protective steel wire ropes (21) are respectively provided with a steel wire rope buckle (22), and the steel wire rope buckles (22) are larger than the aperture of the steel wire rope mounting hole.
7. A safe demolition method for manual demolition of cylindrical buildings according to claim 1 wherein: a fastening threaded hole and an upper mounting seat (41) are arranged on the outer side surface of the U-shaped buckle plate (18); a fastening threaded rod (23) is screwed on the fastening threaded hole in a threaded manner; a fastening crank (19) is arranged at the outer end part of the fastening threaded rod (23); a fastening pressing plate for pressing on the outer side wall of the cylindrical building (42) is arranged on the inner end part of the fastening threaded rod (23); the upper end of the suspension chain (17) is fixedly arranged on the upper mounting seat (41).
8. A safe demolition method for manual demolition of cylindrical buildings according to claim 1 wherein: a connecting rod (44) is vertically arranged on the arc-shaped girder (1); the upper end of the connecting rod (44) is provided with a waist-shaped steel rope hole; a safety steel wire rope (6) which surrounds the outer side wall of the cylindrical building (42) in a circle is arranged in the waist-shaped steel wire rope hole in a penetrating mode; a steel ring (7) is arranged on the safety steel wire rope (6).
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| CN112440241B (en) * | 2019-08-27 | 2022-06-28 | 中冶宝钢技术服务有限公司 | Bilateral scissors pinch roll sleeve pipe dismounting tool and use method thereof |
| CN112127697B (en) * | 2020-09-27 | 2022-02-11 | 广西建工集团冶金建设有限公司 | Dismantling method of reinforced concrete chimney |
| CN113463943B (en) * | 2021-07-08 | 2022-10-04 | 温州高达建设有限公司 | High-rise cast-in-place concrete building demolition construction method |
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