CN103015744B - Method for removing reinforced concrete chimney - Google Patents
Method for removing reinforced concrete chimney Download PDFInfo
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- CN103015744B CN103015744B CN201210578884.XA CN201210578884A CN103015744B CN 103015744 B CN103015744 B CN 103015744B CN 201210578884 A CN201210578884 A CN 201210578884A CN 103015744 B CN103015744 B CN 103015744B
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Abstract
The invention discloses a method for removing a reinforced concrete chimney. The method for removing the reinforced concrete chimney comprises the following steps of: I, performing buffer layer laying: laying a buffer layer at the toppling position of the reinforced concrete chimney; II, performing guide steel cable installation: laying a guide steel cable for guiding the chimney during a toppling process; III, performing chimney outer side packaging and water spray pipeline laying; IV, performing cutting area marking; V, performing temporary support member installation; VI, performing cutting area concrete chiseling away and steel bar cutting off; VII, performing water spraying; VIII, performing adjustment on the support height of a temporary support member until the chimney is toppled: gradually adjusting the support height of the temporary support member downwards until the chimney is unstable under the effect of the gravity of the chimney and is toppled onto the buffer layer; and IX, clearing a construction site. The method disclosed by the invention is simple in step, reasonable in design, convenient in implementation, high in removal speed and good in using effect. The chimney is entirely, slowly and directionally toppled by utilizing the temporary support effect of the support member, and the construction problem that the reinforced concrete chimney is entirely and rapidly removed under a non-blasting operation condition is solved.
Description
Technical field
The invention belongs to engineering structure Demolishing Technology field, especially relate to a kind of reinforced concrete chimney method for dismounting.
Background technology
It is a construction content common in Municipal Engineering Construction that reinforced concrete chimney is removed, nowadays conventional Demolition Construction method is divided into following two kinds: a kind of construction method is artificial broken concrete method for dismounting progressively from top to bottom, and another kind of construction method is global orientation blasting demolishing method.But during practice of construction, there is the work high above the ground time defect such as grow, waste time and energy in above-mentioned the first construction method, and not only construction cost is high, and high-altitude working safety has a big risk; Above-mentioned the second construction method is except bursting work security risk is large, and the instantaneous speed of collapsing of chimney is very fast, large to the impact of ground and surrounding environment, and it is more difficult that blasting flyrock is controlled.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of reinforced concrete chimney method for dismounting is provided, its method step is simple, reasonable in design, realization is convenient and dismounting speed is fast, result of use good, utilize the temporary supporting effect of support member to realize the whole slowly directioning falling of chimney, efficiently solve the construction difficult problem that in non-bursting work situation, the whole fast dismantling of reinforced concrete chimney removes.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of reinforced concrete chimney method for dismounting, and the reinforced concrete chimney of removing is vertically to laying, and described reinforced concrete chimney inside is provided with and is vertically to the cage of reinforcement of laying; The cross section of described reinforced concrete chimney is that annular and its external diameter from top to bottom increase gradually, it is characterized in that the method comprises the following steps:
Step 1, cushion coat are laid: according to all side rings border of reinforced concrete chimney present position, determine dump position and the toppling direction of reinforced concrete chimney, and on determined dump position, lay one deck cushion coat;
Step 2, guiding wirerope are installed: in step 1, on determined toppling direction, lay the guiding wirerope in toppling process, reinforced concrete chimney being led; The Qie Qi bottom, top that the top of described guiding wirerope is fixed on described cage of reinforcement is laid on wirerope rolling-up mechanism, and described wirerope rolling-up mechanism is fixed on and is laid on ground fixture;
Step 3, chimney outside parcel are laid with water pipe: in the outside of reinforced concrete chimney, wrap up one or more layers straw screen or mat from top to bottom, and at the top of reinforced concrete chimney, lay spray water device, and described spray water device and high service pipeline join;
Step 4, cutting zone indicate: according to the cutting position of design in advance and shape and the size of cutting zone, on the bottom outside wall of reinforced concrete chimney, indicate described cutting zone; Described cutting zone is to be level to the circular arc region of laying, and the center line in described circular arc region with in step 1 the toppling direction of definite reinforced concrete chimney consistent;
Described cutting zone is divided into chimney root by reinforced concrete chimney and the chimney that is positioned at directly over described chimney root is toppled over sections;
Step 5, temporary supporting part are installed: first the chimney wall concrete under the middle part of cutting zone described in step 4 and described cutting zone middle part is cut, be fixed on the bar construction that now expose described cage of reinforcement bottom temporary supporting part is fastening again, and the described bar construction exposing is positioned at described cutting zone below; The top of described temporary supporting part is propped up and is withstood on the bottom that described chimney is toppled over sections, and the top braces of described temporary supporting part point is positioned at directly over the middle part of described cutting zone; Described temporary supporting part is to be vertically to the retractable supports part of laying;
Step 6, cutting zone concrete chisel removal and bar cutting: all chimney wall concrete in cutting zone described in step 4 are cut, and cut off all reinforcing bars that expose in described cutting zone;
Step 7, water spray: open high service pipeline and pass through a plurality of described shower nozzles, to the chimney wall of reinforced concrete chimney and the described straw screen or mat water spray of its outside parcel, until the described straw screen or mat of the chimney wall of reinforced concrete chimney and its outside parcel all soaks completely;
Step 8, adjust temporary supporting part bearing height until chimney is toppled over: first close high service pipeline, and adopt described wirerope rolling-up mechanism to tighten up guiding wirerope; Afterwards, the bearing height of described temporary supporting part is adjusted downwards gradually, until described chimney is toppled over sections unstability under self gravitation effect, be also poured onto on cushion coat downwards;
Step 9, cleaning job site, complete the Demolition Construction process of reinforced concrete chimney.
Above-mentioned a kind of reinforced concrete chimney method for dismounting, is characterized in that: while laying cushion coat in step 1, also need deviate from a side dead astern of toppling direction in reinforced concrete chimney bottom, it is highly the mound of h that heap is built; Wherein h is higher than more than the bottom of cutting zone described in step 4 3m.
Above-mentioned a kind of reinforced concrete chimney method for dismounting, it is characterized in that: cushion coat described in step 1 is that thickness is the loose ground bed course of 1.0m～1.5m, width D=d+ Δ d of described loose soil layer, the bottom external diameter that wherein d is reinforced concrete chimney, Δ d=5m～7m.
Above-mentioned a kind of reinforced concrete chimney method for dismounting, is characterized in that: fixture described in step 2 is earth anchor, and described wirerope rolling-up mechanism is the jack being laid on described earth anchor.
Above-mentioned a kind of reinforced concrete chimney method for dismounting, is characterized in that: in step 3, after the described straw screen or mat of described reinforced concrete chimney outside parcel, also need to adopt the multiple tracks hoop hoop of laying to carry out colligation to wrapped up straw screen or mat from top to bottom and fix.
Above-mentioned a kind of reinforced concrete chimney method for dismounting, it is characterized in that: the part of temporary supporting described in step 5 is sand cylinder, described sand cylinder comprises bed plate, be fixed on bed plate and the outer sleeve of upper opening, from top to bottom coaxial package is in the inner sleeve of outer sleeve inside and sealed bottom be laid in the upper plate at inner sleeve top, and described bed plate and upper plate are all level to laying; Fine sand is equipped with in described outer sleeve inside, and prop up on the end face that withstands on fine sand the bottom of described inner sleeve; Described bed plate middle part has sand outlet, and the shutoff bolt that sand outlet is carried out to shutoff is housed on described bed plate from the bottom to top, and described outer sleeve and inner sleeve are all vertically to laying; Correspondingly, when the bearing height of described temporary supporting part is adjusted downwards gradually in step 8, open shutoff bolt, and by sand outlet, the fine sand that fills in outer sleeve is released gradually, thereby upper plate is moved down gradually.
Above-mentioned a kind of reinforced concrete chimney method for dismounting, is characterized in that: described bed plate, outer sleeve, inner sleeve and upper plate all adopt steel to process; In step 5, by temporary supporting part bottom is fastening while being fixed on the bar construction that now expose described cage of reinforcement bottom, first with welding manner, sand cylinder is weldingly fixed on described bar construction; Afterwards, the chimney wall concreting that adopts concrete that sand cylinder and described chimney root are not cut is integrated.
Above-mentioned a kind of reinforced concrete chimney method for dismounting, is characterized in that: when all chimney wall concrete in described cutting zone are cut in step 6, by the middle part symmetry of described cutting zone, to both sides, cut; After all chimney wall concrete in described cutting zone all cut, more all vertical reinforcements that expose in described cutting zone are cut off; And when in described cutting zone, all vertical reinforcements that expose cut off, by the middle part symmetry of described cutting zone, to both sides, cut off.
Above-mentioned a kind of reinforced concrete chimney method for dismounting, is characterized in that: the top of reinforced concrete chimney described in step 3 is provided with the toroidal frame of installing for a plurality of described sprinkler tips; The part of temporary supporting described in step 5 top is provided with proof mechanism of water.
Above-mentioned a kind of reinforced concrete chimney method for dismounting, it is characterized in that: after all chimney wall concrete described in step 6 in cutting zone cut, in the vertical direction of corresponding formation is trapezoidal cutting mouth at right angles, the opening direction of described cutting mouth with in step 1 the toppling direction of definite reinforced concrete chimney consistent; While being cut to both sides by the middle part symmetry of described cutting zone, first adopt pneumatic pick to cut, when cutting position and approach the root of cutting zone described in step 4, the more artificial cutter tool that adopts cuts.
The present invention compared with prior art has the following advantages:
1, method for dismounting step is simple and realize conveniently, drops into construction cost lower.
2, reasonable in design, the method of utilizing part to cut chimney wall, using and be arranged on the sand cylinder at joint-cutting place as the temporary supporting of joint-cutting top chimney, after completing the cutting of part chimney wall, by sand outlet, continuing to leak sand slowly sinks sand cylinder top braces backing plate, joint-cutting top chimney tilts until eccentric unstability is slowly toppled under Gravitative Loads thereupon gradually, thereby has realized the overall pulling down at non-bursting work lower stack.That is to say, during practice of construction, adopt the method that sand cylinder temporary supporting is installed in advance, guaranteed artificial chisel except part chimney wall and cut off the stability of the situation lower stack structure of reinforcing bar, whole reasonable stress, construction economy, simple and direct and efficient.
3, the temporary supporting part reasonable in design adopting and use easy and simple to handle, by sand outlet, continuing to leak sand slowly sinks sand cylinder top braces backing plate, joint-cutting top chimney tilts until eccentric unstability is slowly toppled under Gravitative Loads thereupon gradually, thereby has realized the construction difficult problem at the overall pulling down of non-bursting work lower stack.
4, adopt in chimney appearance and swathe two-layer straw screen or mat and by the method for water-soaked, effectively limit collapse moment broken concrete of chimney and splash and dust flies upward situation.
5, by topple over the method for the loose soil layer of region place mat at chimney, cushioned to a certain extent the fall down percussion on moment and ground of chimney, also effectively limited splashing of part broken concrete.
6, adopt the method at chimney toppling direction back side mound, prevent from because there is back seat or chimney, in joint-cutting section bending fracture, causing local crushing of concrete to splash in chimney toppling process.
7, save time, convenient, efficient, practical and be easy to control, result of use is good, sand cylinder temporary supporting is installed in advance in employing near chimney root, after cutting joint-cutting region chimney wall concrete and cut reinforcing bar and completing, opening sand outlet slowly spills fine sand in steel drum continuously, the sand cylinder top backing plate that supports joint-cutting top chimney sinks gradually, and joint-cutting top chimney tilts until eccentric unstability is toppled over gradually under Gravitative Loads.Thereby, the present invention effectively utilizes the temporary supporting effect of sand cylinder, realize the whole slowly directioning falling of chimney, effectively slowed down the percussion that chimney collapses to ground, solved the construction difficult problem that in non-bursting work situation, the whole fast dismantling of reinforced concrete chimney removes.
In sum, the inventive method step is simple, reasonable in design, realization is convenient and dismounting speed is fast, result of use good, utilize the temporary supporting effect of support member to realize the whole slowly directioning falling of chimney, efficiently solve the construction difficult problem that in non-bursting work situation, the whole fast dismantling of reinforced concrete chimney removes.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is construction method FB(flow block) of the present invention.
Fig. 2 is dismounting view of the present invention.
Fig. 3 is the top view of Fig. 2.
Fig. 4 is the left view of reinforced concrete chimney in Fig. 2.
Fig. 5 is the structural representation of sand cylinder of the present invention.
Fig. 6 by the present invention cut after cutting zone concrete the structural representation of formation cutting mouth.
Description of reference numerals:
1-reinforced concrete chimney; 2-cushion coat; 3-guiding wirerope;
4-shower nozzle; 5-high service pipeline; 6-hoop hoop;
7-sand cylinder; 7-1-bed plate; 7-2-outer sleeve;
7-3-inner sleeve; 7-4-upper plate; 7-5-fine sand;
7-6-sand outlet; 7-7-shutoff bolt; 7-8-splash guard;
8-cutting mouth; 9-mound; 10-toroidal frame;
11-straw screen or mat.
The specific embodiment
A kind of reinforced concrete chimney method for dismounting as shown in Figure 1, the reinforced concrete chimney 1 of removing is vertically to laying, and described reinforced concrete chimney 1 inside is provided with and is vertically to the cage of reinforcement of laying, and described cage of reinforcement comprises many vertical reinforcements; The cross section of described reinforced concrete chimney 1 is that annular and its external diameter from top to bottom increase gradually, refers to Fig. 2, Fig. 3 and Fig. 4.During practice of construction, this method for dismounting comprises the following steps:
Step 1, cushion coat are laid: according to all side rings border of reinforced concrete chimney 1 present position, determine dump position and the toppling direction of reinforced concrete chimney 1, and on determined dump position, lay one deck cushion coat 2.
In the present embodiment, the loose ground bed course that described cushion coat 2 is 1.0m～1.5m for thickness, width D=d+ Δ d of described loose soil layer, wherein d is the bottom external diameter of reinforced concrete chimney 1, Δ d=5m～7m.
And the length of described cushion coat 2 is greater than the vertical height of reinforced concrete chimney 1.
In the present embodiment, Δ d=3m.
During practice of construction, can according to specific needs Δ d be adjusted accordingly in the scope of 5m～7m.In the present embodiment, during Specific construction, first according to surrounding environment, determine the toppling direction of reinforced concrete chimney 1, respectively extend out in the wide scope of 3m afterwards in the view field both sides of toppling over of reinforced concrete chimney 1, place mat a layer thickness is 1.0m～1.5m loose ground.
In addition, described cushion coat 2 also can adopt the soft material matting layer of other type.
Step 2, guiding wirerope are installed: in step 1, on determined toppling direction, lay the guiding wirerope 3 in toppling process, reinforced concrete chimney 1 being led; The Qie Qi bottom, top that the top of described guiding wirerope 3 is fixed on described cage of reinforcement is laid on wirerope rolling-up mechanism, and described wirerope rolling-up mechanism is fixed on and is laid on ground fixture.
In the present embodiment, described fixture is earth anchor, and described wirerope rolling-up mechanism is the jack being laid on described earth anchor.
During practice of construction, described fixture also can adopt the fastening devices of other type, and described wirerope rolling-up mechanism also can adopt the wrap-up of other type.
When specifically guiding wirerope 3 is installed, according to designing requirement, along the toppling direction of determined reinforced concrete chimney 1 in step 1, guiding wirerope 3 is installed, and one end of the guiding wirerope 3 of installing is fixed in the top rebars (being the top of described cage of reinforcement) of reinforced concrete chimney 1, and the other end and described jack join.
Step 3, chimney outside parcel are laid with water pipe: in the outside of reinforced concrete chimney 1, wrap up one or more layers straw screen or mat 11 from top to bottom, and at the top of reinforced concrete chimney 1, lay spray water device, and described spray water device and high service pipeline 5 join.
In the present embodiment, described spray water device is a plurality of shower nozzles 4 of along the circumferential direction evenly laying at the top of reinforced concrete chimney 1, and a plurality of described shower nozzle 4 all joins with high service pipeline 5.
In the present embodiment, the number of plies of described straw screen or mat 11 is two-layer, and wraps up after described straw screen or mat 11 in described reinforced concrete chimney 1 outside, also needs to adopt 6 pairs of straw screen or mat that wrap up of multiple tracks hoop hoop 11 of laying to carry out colligation from top to bottom and fixes.
During practice of construction, can according to specific needs, the number of plies of wrapped up straw screen or mat 11 be adjusted accordingly.In the present embodiment, the spacing between neighbouring two described hoop hoops 6 is 1.5m～2.5m, and described hoop hoop 6 is formed by iron wire bending.
In the present embodiment, the spacing between adjacent two the described sprinkler tips 4 in left and right is 30cm～40cm.
When reality is laid a plurality of described sprinkler tips 4, can according to specific needs, the spacing between the quantity of described sprinkler tip 4 two described sprinkler tips 4 adjacent with left and right be adjusted accordingly.
In the present embodiment, described high service pipeline 5 is canvas hose, and the water inlet end of described canvas hose joins with the water side that is laid in ground high-pressure hydraulic pump.
In addition, the top of described reinforced concrete chimney 1 is provided with the toroidal frame 10 of installing for a plurality of described sprinkler tips 4.
Step 4, cutting zone indicate: according to the cutting position of design in advance and shape and the size of cutting zone, on the bottom outside wall of reinforced concrete chimney 1, indicate described cutting zone; Described cutting zone is to be level to the circular arc region of laying, and the center line in described circular arc region with in step 1 the toppling direction of definite reinforced concrete chimney 1 consistent.
Meanwhile, selected cutting zone is answered constructability, operation.
Described cutting zone is divided into chimney root by reinforced concrete chimney 1 and the chimney that is positioned at directly over described chimney root is toppled over sections.
In the present embodiment, described cutting zone is positioned at the root of reinforced concrete chimney 1, and the vertical height on described cutting zone distance from bottom ground is 0.3m～0.8m.
Step 5, temporary supporting part are installed: first the chimney wall concrete under the middle part of cutting zone described in step 4 and described cutting zone middle part is cut, be fixed on the bar construction that now expose described cage of reinforcement bottom temporary supporting part is fastening again, and the described bar construction exposing is positioned at described cutting zone below; The top of described temporary supporting part is propped up and is withstood on the bottom that described chimney is toppled over sections, and the top braces of described temporary supporting part point is positioned at directly over the middle part of described cutting zone; Described temporary supporting part is to be vertically to the retractable supports part of laying.
During practice of construction, in step 4, indicate after described cutting zone, also need, according to indicated described cutting zone, to determine the installation site of described temporary supporting part.
During practice of construction, described temporary supporting part top is provided with proof mechanism of water.
In the present embodiment, in conjunction with Fig. 5, described temporary supporting part is sand cylinder 7, described sand cylinder 7 comprises bed plate 7-1, be fixed on the outer sleeve 7-2 of the upper and upper opening of bed plate 7-1, from top to bottom coaxial package is in the inner sleeve 7-3 of outer sleeve 7-2 inside and sealed bottom be laid in the upper plate 7-4 at inner sleeve 7-3 top, and described bed plate 7-1 and upper plate 7-4 are all level to laying; Described outer sleeve 7-2 is equipped with fine sand 7-5 in inside, and prop up on the end face that withstands on fine sand 7-5 the bottom of described inner sleeve 7-3; Described bed plate 7-1 middle part has sand outlet 7-6, and the shutoff bolt 7-7 that sand outlet 7-6 is carried out to shutoff is housed on described bed plate 7-1 from the bottom to top, and described outer sleeve 7-2 and inner sleeve 7-3 are all vertically to laying.
In the present embodiment, described proof mechanism of water is the splash guard 7-8 mounting cover on upper plate 7-4.
Actually add man-hour, described splash guard 7-8 is circular tetrafluoro plate.Described fine sand 7-5 is dry sand.
In the present embodiment, described outer sleeve 7-2 and inner sleeve 7-3 are cylinder.Actually add man-hour, described outer sleeve 7-2 and inner sleeve 7-3 also can adopt the cylindrical shell of other structure, the positive polygon prism shape cylindrical shell of institute.
In the present embodiment, described bed plate 7-1, outer sleeve 7-2, inner sleeve 7-3 and upper plate 7-4 all adopt steel to process.
During practice of construction, by described temporary supporting part bottom is fastening while being fixed on the bar construction that now expose described cage of reinforcement bottom, first with welding manner, sand cylinder 7 is weldingly fixed on described bar construction; Afterwards, the chimney wall concreting that adopts concrete that sand cylinder 7 and described chimney root are not cut is integrated.
In the present embodiment, with welding manner, sand cylinder 7 is weldingly fixed on the longitudinal reinforcement of described bar construction.Meanwhile, the top of described sand cylinder 7 is also provided with slide plate.
When the chimney wall concreting that adopts concrete that sand cylinder 7 and described chimney root are not cut is integrated, need to guarantee in the impregnable situation of described sand outlet 7-6, adopt high-grade concrete that sand cylinder 7 both sides and the former concreting that is positioned at the reinforced concrete chimney 1 of the below of cutting zone described in step 4 are formed to integral body.The strength grade of the high-grade concrete that adopts is than high one or two grade of the former concrete strength grade of reinforced concrete chimney 1.
Step 6, cutting zone concrete chisel removal and bar cutting: all chimney wall concrete in cutting zone described in step 4 are cut, and cut off all reinforcing bars that expose in described cutting zone.
In the present embodiment, when all chimney wall concrete in described cutting zone are cut, by the middle part symmetry of described cutting zone, to both sides, cut; After all chimney wall concrete in described cutting zone all cut, more all vertical reinforcements that expose in described cutting zone are cut off; And when in described cutting zone, all vertical reinforcements that expose cut off, by the middle part symmetry of described cutting zone, to both sides, cut off.
During practice of construction, while being cut to both sides by the middle part symmetry of described cutting zone, first adopt pneumatic pick to cut, when cutting position and approach the root of cutting zone described in step 4, the more artificial cutter tool that adopts cuts.
To sum up, in this step, take sand cylinder 7 present positions is starting point, yearns for bilateral symmetry cut the chimney wall concrete in described cutting zone along the sidewall week of reinforced concrete chimney 1, during beginning, adopt pneumatic pick to cut, and adopt while cutting region root described in approaching method that artificial chisel removes to cut to put in place; Afterwards, by the middle part symmetry of described cutting zone, to both sides, exposed steel bar (the specifically longitudinal reinforcement in described cage of reinforcement) is cut off.
In the present embodiment, after all chimney wall concrete in described cutting zone cut, rectangular trapezoidal cutting mouth 8 on vertical direction of corresponding formation, in the opening direction of described cutting mouth 8 and step 1 definite reinforced concrete chimney 1 toppling direction over against, refer to Fig. 6.
The bottom lengths of described cutting mouth 8 is institute installation position place reinforced concrete chimney 1 external diameter
the opening part height of described cutting mouth 8 is 0.3m～0.7m.In addition, firm for guaranteeing 7 installations of sand cylinder, before described temporary supporting part being installed in step 5, first the opening part top of described cutting mouth 8 is processed into horizontal plane.
Step 7, water spray: open high service pipeline 5 and pass through a plurality of described shower nozzles 4, to the chimney wall of reinforced concrete chimney 1 and described straw screen or mat 11 water sprays of its outside parcel, until the described straw screen or mat 11 of the chimney wall of reinforced concrete chimney 1 and its outside parcel all soaks completely.
Step 8, adjust temporary supporting part bearing height until chimney is toppled over: first close high service pipeline 5, and adopt described wirerope rolling-up mechanism to tighten up guiding wirerope 3; Afterwards, the bearing height of described temporary supporting part is adjusted downwards gradually, until described chimney is toppled over sections unstability under self gravitation effect, be also poured onto downwards on cushion coat 2.
In the present embodiment, when the bearing height of described temporary supporting part is adjusted downwards gradually in step 8, open shutoff bolt 7-7, and by sand outlet 7-6, the fine sand that fills in outer sleeve 7-2 is released gradually, thereby upper plate 7-4 is moved down gradually.
Step 9, cleaning job site, complete the Demolition Construction process of reinforced concrete chimney 1.
In the present embodiment, while laying cushion coat 2 in step 1, also need deviate from reinforced concrete chimney 1 bottom a side dead astern of toppling direction, it is highly the mound 9 of h that heap is built; Wherein h is higher than more than the bottom of cutting zone described in step 4 3m.The length of described mound 9 and width are all not less than 5m.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
Claims (10)
1. a reinforced concrete chimney method for dismounting, the reinforced concrete chimney of removing (1) is vertically to laying, and described reinforced concrete chimney (1) inside is provided with and is vertically to the cage of reinforcement of laying; The cross section of described reinforced concrete chimney (1) is that annular and its external diameter from top to bottom increase gradually, it is characterized in that the method comprises the following steps:
Step 1, cushion coat are laid: according to all side rings border of reinforced concrete chimney (1) present position, determine dump position and the toppling direction of reinforced concrete chimney (1), and on determined dump position, lay one deck cushion coat (2);
Step 2, guiding wirerope are installed: in step 1, on determined toppling direction, lay the guiding wirerope (3) in toppling process, reinforced concrete chimney (1) being led; The Qie Qi bottom, top that the top of described guiding wirerope (3) is fixed on described cage of reinforcement is laid on wirerope rolling-up mechanism, and described wirerope rolling-up mechanism is fixed on and is laid on ground fixture;
Step 3, chimney outside parcel are laid with water pipe: in the outside of reinforced concrete chimney (1), wrap up one or more layers straw screen or mat (11) from top to bottom, and at the top of reinforced concrete chimney (1), lay spray water device, and described spray water device and high service pipeline (5) join;
Step 4, cutting zone indicate: according to the cutting position of design in advance and shape and the size of cutting zone, on the bottom outside wall of reinforced concrete chimney (1), indicate described cutting zone; Described cutting zone is to be level to the circular arc region of laying, and the center line in described circular arc region with in step 1 the toppling direction of definite reinforced concrete chimney (1) consistent;
Described cutting zone is divided into chimney root by reinforced concrete chimney (1) and the chimney that is positioned at directly over described chimney root is toppled over sections;
Step 5, temporary supporting part are installed: first the chimney wall concrete under the middle part of cutting zone described in step 4 and described cutting zone middle part is cut, be fixed on the bar construction that now expose described cage of reinforcement bottom temporary supporting part is fastening again, and the described bar construction exposing is positioned at described cutting zone below; The top of described temporary supporting part is propped up and is withstood on the bottom that described chimney is toppled over sections, and the top braces of described temporary supporting part point is positioned at directly over the middle part of described cutting zone; Described temporary supporting part is to be vertically to the retractable supports part of laying;
Step 6, cutting zone concrete chisel removal and bar cutting: all chimney wall concrete in cutting zone described in step 4 are cut, and cut off all reinforcing bars that expose in described cutting zone;
Step 7, water spray: open high service pipeline (5) and pass through a plurality of shower nozzles (4), to the chimney wall of reinforced concrete chimney (1) and described straw screen or mat (11) water spray of its outside parcel, until the described straw screen or mat (11) of the chimney wall of reinforced concrete chimney (1) and its outside parcel all soaks completely;
Step 8, adjust temporary supporting part bearing height until chimney is toppled over: first close high service pipeline (5), and adopt described wirerope rolling-up mechanism to tighten up guiding wirerope (3); Afterwards, the bearing height of described temporary supporting part is adjusted downwards gradually, until described chimney is toppled over sections unstability under self gravitation effect, be also poured onto downwards on cushion coat (2);
Step 9, cleaning job site, complete the Demolition Construction process of reinforced concrete chimney (1).
2. according to a kind of reinforced concrete chimney method for dismounting claimed in claim 1, it is characterized in that: while laying cushion coat (2) in step 1, also need deviate from a side dead astern of toppling direction in reinforced concrete chimney (1) bottom, it is highly the mound of h (9) that heap is built; Wherein h is higher than more than the bottom of cutting zone described in step 4 3m.
3. according to a kind of reinforced concrete chimney method for dismounting described in claim 1 or 2, it is characterized in that: the loose ground bed course that cushion coat described in step 1 (2) is 1.0m～1.5m for thickness, width D=d+ Δ d of described loose soil layer, wherein d is the bottom external diameter of reinforced concrete chimney (1), Δ d=5m～7m.
4. according to a kind of reinforced concrete chimney method for dismounting described in claim 1 or 2, it is characterized in that: fixture described in step 2 is earth anchor, and described wirerope rolling-up mechanism is the jack being laid on described earth anchor.
5. according to a kind of reinforced concrete chimney method for dismounting described in claim 1 or 2, it is characterized in that: in step 3, after described reinforced concrete chimney (1) the outside described straw screen or mat of parcel (11), also need to adopt the multiple tracks hoop hoop (6) of laying to carry out colligation to wrapped up straw screen or mat (11) from top to bottom and fix.
6. according to a kind of reinforced concrete chimney method for dismounting described in claim 1 or 2, it is characterized in that: the part of temporary supporting described in step 5 is sand cylinder (7), described sand cylinder (7) comprises bed plate (7-1), be fixed on the outer sleeve (7-2) of the upper and upper opening of bed plate (7-1), from top to bottom coaxial package is in the inner sleeve (7-3) of outer sleeve (7-2) inside and sealed bottom be laid in the upper plate (7-4) at inner sleeve (7-3) top, and described bed plate (7-1) and upper plate (7-4) are all level to laying; Fine sand (7-5) is equipped with in described outer sleeve (7-2) inside, and prop up on the end face that withstands on fine sand (7-5) bottom of described inner sleeve (7-3); Described bed plate (7-1) middle part has sand outlet (7-6), and the shutoff bolt (7-7) that sand outlet (7-6) is carried out to shutoff is housed on described bed plate (7-1) from the bottom to top, and described outer sleeve (7-2) and inner sleeve (7-3) are all vertically to laying; Correspondingly, when the bearing height of described temporary supporting part is adjusted downwards gradually in step 8, open shutoff bolt (7-7), and by sand outlet (7-6), the fine sand that fills in outer sleeve (7-2) is released gradually, thereby upper plate (7-4) is moved down gradually.
7. according to a kind of reinforced concrete chimney method for dismounting claimed in claim 6, it is characterized in that: described bed plate (7-1), outer sleeve (7-2), inner sleeve (7-3) and upper plate (7-4) all adopt steel to process; In step 5, by temporary supporting part bottom is fastening while being fixed on the bar construction that now expose described cage of reinforcement bottom, first with welding manner, sand cylinder (7) is weldingly fixed on described bar construction; Afterwards, the chimney wall concreting that adopts concrete that sand cylinder (7) and described chimney root are not cut is integrated.
8. according to a kind of reinforced concrete chimney method for dismounting described in claim 1 or 2, it is characterized in that: when all chimney wall concrete in described cutting zone are cut in step 6, by the middle part symmetry of described cutting zone, to both sides, cut; After all chimney wall concrete in described cutting zone all cut, more all vertical reinforcements that expose in described cutting zone are cut off; And when in described cutting zone, all vertical reinforcements that expose cut off, by the middle part symmetry of described cutting zone, to both sides, cut off.
9. according to a kind of reinforced concrete chimney method for dismounting described in claim 1 or 2, it is characterized in that: the top of reinforced concrete chimney described in step 3 (1) is provided with the toroidal frame (10) of installing for a plurality of described sprinkler tips (4); The part of temporary supporting described in step 5 top is provided with proof mechanism of water.
10. according to a kind of reinforced concrete chimney method for dismounting claimed in claim 8, it is characterized in that: after all chimney wall concrete described in step 6 in cutting zone cut, in the vertical direction of corresponding formation is trapezoidal cutting mouth (8) at right angles, the opening direction of described cutting mouth (8) with in step 1 the toppling direction of definite reinforced concrete chimney (1) consistent; While being cut to both sides by the middle part symmetry of described cutting zone, first adopt pneumatic pick to cut, when cutting position and approach the root of cutting zone described in step 4, the more artificial cutter tool that adopts cuts.
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| CN105926976B (en) * | 2016-03-31 | 2018-09-04 | 大连久鼎祥瑞特种工程技术研究院有限公司 | The method of non-explosion slewing demolition of buildings |
| CN107882356A (en) * | 2017-11-09 | 2018-04-06 | 河南理工大学 | A kind of mechanical removal construction method of cooling tower |
| CN108894534B (en) * | 2018-05-29 | 2020-11-13 | 五冶集团上海有限公司 | Sintering desulfurization plant modular dismantling method |
| CN108981515B (en) * | 2018-10-19 | 2024-02-27 | 洛阳理工学院 | Sheath for preventing brick chimney from blasting demolition of backseat and construction method |
| CN109267764A (en) * | 2018-11-05 | 2019-01-25 | 中建设集团有限公司 | Engineering method is cut and disassembled in reinforced concrete support mechanization |
| CN110056245A (en) * | 2019-04-22 | 2019-07-26 | 中国核电工程有限公司 | The retired method of radioactivity air draft chimney of concrete structure |
| CN110206378A (en) * | 2019-06-21 | 2019-09-06 | 五冶集团上海有限公司 | Chimney overall pulling down construction method |
| CN111749494A (en) * | 2020-07-01 | 2020-10-09 | 深圳市云筑实业有限公司 | Method for dismantling external wall member of high-rise building |
| 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 |
| CN112227814B (en) * | 2020-09-29 | 2022-04-15 | 中国化学工程第六建设有限公司 | Method for dismantling straight-barrel type concrete tower body |
| CN113279622B (en) * | 2021-05-21 | 2022-11-29 | 核工业南京建设集团有限公司 | Method for dismantling thin-wall reinforced concrete chimney through high-notch blasting |
| CN115199083A (en) * | 2022-06-29 | 2022-10-18 | 中建三局集团有限公司 | Method for quickly disassembling reinforced concrete vertical member |
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