CN1202563A - Prestress dismantling method for building of steel reinforced concrete and block structure - Google Patents
Prestress dismantling method for building of steel reinforced concrete and block structure Download PDFInfo
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- CN1202563A CN1202563A CN 98111404 CN98111404A CN1202563A CN 1202563 A CN1202563 A CN 1202563A CN 98111404 CN98111404 CN 98111404 CN 98111404 A CN98111404 A CN 98111404A CN 1202563 A CN1202563 A CN 1202563A
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Abstract
The method is that based on the mechanical features of the building, superstrong horizontal force is applied to main stressed components, column or wall, for instantaneous break and slump so as to make the building break down fast. It features that in the building, several columns or walls are selected as force applied components to be applied by the horizontal forces with the near columns or walls being used as counter force components. The present invention has the features of strong static force, no vibration, no noise, less dust, remote control and fast orientation, and it is suitable for dismantling building of steel reinforced concrete and block structure completely or locally.
Description
The present invention relates to the dismounting of building and separate body technique, particularly a kind of dismantling prestressing technology about steel concrete and masonry structure building.
Current, the dismounting of building both at home and abroad has with the main method of separating body technique: 1. mechanical removal method, and as adopting methods such as weight bump, various crane hang and tear open, wire rope forgets about it.In the construction, vibration, noise, dust and flue gas are arranged, also there is certain requirement in the place; 2. power demolition blasting method: close blast hole drilling on the works supporting member is arranged, adopt moment to ignite simultaneously or elementary errors is ignited, demolish works fast, and can accomplish that orientation collapses.But can produce very big roar and vibration wave, simultaneously, fragment flies out, and the cloud of dust fills the air, even wound the pedestrian; 3. quiet bulbs of pressure demolition reduction method: close eyelet work on works, filling expansion cracking agent, generally through hour expansion half an hour to five, hole wall is produced radial pressure and circumferential pressure, make the works cracking, disintegrate this method noiseless, friction, but, and expense height big to the broken difficulty of the cracking of the structure that receives pressure; 4. hot melt cutting disassembling method: by the flame of temperature about up to 3000 ℃, the fusing steel bar concrete, speed of application is fast, the efficient height.But fire safety problem is very outstanding, and structural entity is collapsed big difficulty and danger; 5. manpower is in conjunction with the apparatus dismounting method: this method expense is low, tears back constructional materials utilization rate height open, but long in time limit, workman's condition of work and work situation are poor, and greatly dangerous; 6. adopt the high pressure fire hose, other some special dismounting methods such as laser, but domesticly do not see application example.In China, the method for generally using is the very low artificial dismounting method of mechanization degree now, secondly is other methods such as power explosion.
The objective of the invention is to provide a kind of according to the fabric structure loading characteristic, utilize the prestressing force complete set technology, main supporting member to steel bar concrete and masonry structure building---post (wall) applies horizontal applied force, makes it to fracture, slump, with the method that causes structure to be disintegrated rapidly.
Because fabric structure is generally by main structural element: post, beam, plate etc. are formed.The general Path of Force Transfer of gravitational load is: plate → beam → post → basis.Wherein, post is topmost bearing carrier in plate, beam, post.Therefore, the inefficacy of post tends to cause the inefficacy in succession of beam, plate, causes fabric structure to collapse.The present invention chooses some posts as the post that fractureed in fabric structure.And, lost efficacy for making post, can choose post adjacent thereto as the counter-force post, the characteristics low according to steel concrete tensile strength are to applying horizontal applied force in the post post that fractureed.Because after post fractureed, the span of beam is general to increase about one times, stride beam by former two and become and stride beam.Like this, the interior negative moment of backing plate of former Vierendeel girder is transformed into the positive bending moment that numerical value is multiplied behind the folding post; Former Vierendeel girder limit negative moment of backing plate also is multiplied.M curve a changes curve c gradually on the beam.The bearing cross section is at first because of excessive positive bending moment effect cracking destruction in the beam, M curve c just soon is transformed into curve d thereupon on the beam afterwards, at this moment the beam section between bearing and limit bearing is as semi girder in the Vierendeel girder, and bearing cross section, limit is very fast because of ftractureed by big hogging moment.Owing to all lost efficacy in these cross sections, beam has also just been fractureed.Fabric structure is in its main bearing member---and after post, beam lost efficacy in succession, total is just all slumps immediately also.
To the dismounting of masonry structure building, can choose some walls as being removed wall, as counter force wall, apply horizontal applied force with its contiguous wall to being removed wall, it is torn open collapse, thereby, whole masonry structure is caved in.
Dismantling prestressing method of the present invention can be utilized complete prestressing technique equipment at short notice, and to the building structure main bearing member: post, wall etc. produce superpower static(al), and these members are fractureed, and make house collapse.It can be applicable to the disintegration of house integral structure or partial structurtes, also can be applicable to remove those supporting members that no longer need after the building structure transformation, as the post of steel concrete or masonry, wall, beam etc.Tear the general section of the being broken down into nodular of original structure after collapsing open,,, also can carry out secondary and even fracture for three times long segment as plate, beam section, shell of column etc.At last, can utilize crane gear to remove these structural element sections rapidly.Obviously, clear work conveniently than other dismounting method.Tear open when collapsing in house integral body, if the selected different post order of tearing open also can make the house collapse towards specific direction.In addition,, still can malformation monitoring device be set on the post being split off, and tester is located at safety zone beyond the house together with jack pressurized control oil pump, to guarantee the safety of work progress for controlling whole demolishing process.In a word, the present invention has strong static(al), friction, noiseless, few dust, the characteristics of long-distance remote control and slewing.After adopting this technology, not only can effectively improve the operating efficiency of structural demolition, labor savings, and, can improve condition of work and the enhancing safety of workman in removing the housing construction process.According to the investigation and the analysis of present reinforced concrete building being removed market, the required duration of dismantling prestressing technology is about 1/5 of manpower dismounting method, and appropriate litigation fees: about 300 yuan/m
3Power explosion and static(al) expansion demolition reduction method are about 500 yuan/m
3, be 1.7 times of dismantling prestressing method.Suppose to apply 1,000,000 m every year
3Meter then can be country and saves 200,000,000 yuans.Along with this technology progressively applying constantly perfect in the process, must also will produce remarkable economic efficiency and social benefit more.
Accompanying drawing 1 is that fabric structure post of the present invention is by the schematic diagram that fractures.Wherein curve a is the moment of flexure distribution map on the preceding former Vierendeel girder of folding post; Curve b is suffered moment of flexure distribution map on the horizontal force F effect lower prop.Small circle is represented beam, post control section bar cutting point position among the figure.
Accompanying drawing 2 is A-A cross section folding post application of force figure in the accompanying drawing 1.
Accompanying drawing 3 is a former Vierendeel girder moment of flexure transformation diagram behind the folding post.Wherein curve c is moment of flexure distribution map on the folding post back rest; Curve d is a moment of flexure distribution map on the cracking back rest of the interior bearing cross section of beam.
Accompanying drawing 4 is post, the beam structure slump schematic diagram that fractures in succession.
Accompanying drawing 5 for the house tear open collapse after the longer segment secondary schematic diagram that fractures.
Accompanying drawing 6 is the plan view of single span sandwich construction house breaking.
Accompanying drawing 7 is the stereogram of single span sandwich construction house breaking.
Accompanying drawing 8 is the plan view of twin spans sandwich construction house breaking.
Accompanying drawing 9 is the stereogram of twin spans sandwich construction house breaking.
Accompanying drawing 10 is the plan view of multispan sandwich construction house breaking.
Accompanying drawing 6-10 hollow core arrow is represented structure disintegration direction, and filled arrows is represented the structure function force direction.
Accompanying drawing 11 is removed the signal left view for body of wall.
Accompanying drawing 12 is removed the signal right view for body of wall.
The present invention can further implement by following scheme:
For reducing to put on the active force on the fabric structure post, before post that needs are fractureed applies horizontal applied force F, to be fractureed in the post of post earlier, the bigger control section of moment of flexure draws district's muscle of being advocated to cut off at the bottom of the capital, post, to reduce the opposing moment of flexure in these control cross sections greatly, the post that fractureed can be ftractureed rapidly under less horizontal force action, fracture; Simultaneously for former Vierendeel girder can be fractureed rapidly under structure gravity load G effect after post is fractureed in succession, can be before the folding post, the upper longitudinal bar of vertical muscle in the bottom of bearing in the former Vierendeel girder and limit bearing is also cut off in advance, and former Vierendeel girder moment of flexure approximated zero section before wherein limit bearing upper longitudinal bar cut-out point should be selected in the folding post.The purpose of cutting off the tensile reinforcement of control section is the low bending resistance square M of maximum that makes these cross sections
uReduce to the rib-free cracking moment M in this cross section
Cr, i.e. M
u=M
CrThat is to say that the cross section is in case ftracture just very fast inefficacy.The post muscle cuts off the post horizontal force F that fractures will greatly be reduced, and makes the work of folding post become easy.The beam muscle cuts off and makes structure after post fractures continuous collapse can take place.
For the fabric structure post being fractureed, can reaction beam (4) be set in fractureed post and counter-force post both sides, connect reaction beam (4) by presstressed reinforcing steel (2) and ground tackle (3), and jack (1) is set between reaction beam (4) and counter-force post, the post that fractures is applied superpower horizontal applied force F, it is fractureed; Also can directly apply horizontal applied force, it is fractureed at other reaction frame and the jack pair post that fractureed that only be provided with of the post that fractureed.After structure is torn open and is collapsed, for members (5) such as the bigger beam of length, posts, can between two beams or post, be provided with and support steel column (6) and jack (7), to support steel column (6) by tie-strut (8) and ground tackle (9) is connected with beam or post (5), jack (7) applies superpower active force to beam or post, and it is fractureed.
The structural demolition scheme:
One, removes overall structure
1. successively remove: begin by top layer, from top to bottom dismounting structure member in layer.Cut off earlier the current post of layer, the muscle of being advocated that beam is controlled section torn open, then, in this layer post, apply the horizontal applied force post that fractures, make this layer slump, also fractureed at slump process central sill.Then, cut off shell of column, the intersegmental continuous reinforcing bar of beam, and plate, the intersegmental continuous reinforcing bar of beam.At last, adopt crane gear that the segment that these have separated is hung the scene.
2. whole folding removes: begun by bottom, in advance the reinforcing bar with the control section of main force column, beam all cuts off, then, to bottom column simultaneously or apply the side direction active force, tear the total of collapsing open, structural element is the section of being converted into nodular in the slump process in batches, at last, again the reinforcing bar between segment is cut off, and with crane gear segment is sling one by one and to be transported, up to removing whole building.
Embodiment 1: remove single span sandwich construction house:
(1) begins by bottom, earlier with vertical two ends, house newel post as the counter-force post, getting wherein, 1. a coupled columns is the post that fractureed, cut off post and 1. control the section reinforcing bar with the Vierendeel girder that is attached thereto, mainly be meant the vertical muscle in longitudinal framing beam control section bottom that 1. links to each other with post with longitudinal framing beam control section that 2. post links to each other near the vertical muscle on the top located of equalling zero of moment of flexure, and moment of flexure approximates the upper longitudinal bar at zero place near the transverse frame beam that 1. links to each other with the post control cross section, still getting vertical two ends, house newel post is the counter-force post, get four posts again and 2. be a quilt year disconnected post, and cut off as described above post 2. with the relevant reinforcing bar that is attached thereto Vierendeel girder, at last, 1. coupled columns applies horizontal applied force in the post, fractures post 1.; Then, fracture bottom four posts simultaneously 2., make the whole fall in house.
(2) vertically the left side post is as the counter-force post with the house, and the right side post is as the post that fractureed, and the right side post that fractures simultaneously at last collapses the house to the right.Vice versa.
(3) remove by the standard width of a room in an old-style house: optional vertical two newel posts in house are the counter-force post, and the pillar adjacent with the counter-force post from the close-by examples to those far off fractures.Make the house pursue the standard width of a room in an old-style house and collapse, be removed.
Embodiment 2: remove twin spans sandwich construction house:
Collapse to interior orientation: begin by bottom, 5. 4. 3. 2. left column post or right colonnade as the counter-force post, 1. fractureed middle colonnade in succession or fracture simultaneously, the inside integral body of building structure is collapsed.
Collapse to a side positioning: with right colonnade is the counter-force post, from left to right, successively 5. 4. 3. 2. 1. left column post and middle colonnade is applied horizontal applied force, and left column post, middle colonnade are fractureed successively, and the house is collapsed to the left.Vice versa.
Tear the structure of collapsing open by the standard width of a room in an old-style house: 3 newel posts with the vertical end in house are the counter-force post, then, from the close-by examples to those far off its adjacent post are applied horizontal applied force successively, and 3 pillars that at every turn fracture are up to removing total.
Embodiment 3: multispan multilayer and polymorphic structure house
As removing single span, twin spans sandwich construction, can be to interior orientation dismounting of collapsing, or to a side positioning dismountings of collapsing, or pursue standard width of a room in an old-style house dismounting.
Two, remove partial structurtes
After building strengthening is transformed, often need to remove members such as some posts that no longer need, wall.When removing these members, can choose post adjacent thereto, wall is counter-force post, wall, post, wall that need are removed apply horizontal applied force, and fracture and remove these posts, wall.
Three, body of wall dismounting and masonry structure are torn the landslide case open
For infilled wall and masonry structure building load bearing wall, can cross counter-force girder steel (11), prestressed reinforcement (12), ground tackle (13) be set on the body of wall (10) being removed, on its contiguous body of wall (14), counter-force steel column (15) is set, counter-force girder steel (16), jack (17), presstressed reinforcing steel (12), ground tackle equipment such as (13), and counter-force steel column (15) reliably is connected with original collar tie beam (18) or superstructure, then, apply horizontal applied force and remove body of wall being removed body of wall (10).
If have reinforced concrete pile near removing wall, then can directly select this post for use is the counter-force post, substitutes counter-force steel column.
Hence one can see that, to masonry structure building, can tear the total of collapsing open by removing the bottom load bearing wall; Also can be by successively removing load bearing wall from top to bottom, the way of successively clearing is removed whole house, building.
Claims (6)
1. steel bar concrete and masonry structure building dismantling prestressing method is characterized in that choosing some posts as the post that fractureed in fabric structure, as the counter-force post, the post that fractureed are applied horizontal applied force with its contiguous post.
2. steel bar concrete according to claim 1 and masonry structure building dismantling prestressing method, it is characterized in that before post that needs are fractureed applies horizontal applied force, to be drawn district's muscle of being advocated to cut off by the bigger control section of moment of flexure in the post post that fractures, at the bottom of the capital, post earlier, simultaneously the upper longitudinal bar of vertical muscle in the bottom of bearing in the former Vierendeel girder and limit bearing is also cut off in advance, former Vierendeel girder moment of flexure approximated zero section before wherein limit bearing upper longitudinal bar cut-out point should be selected in the folding post.
3. steel bar concrete according to claim 1 and 2 and masonry structure building dismantling prestressing method, it is characterized in that reaction beam (4) being set in fractureed post and counter-force post both sides, connect reaction beam (4) by presstressed reinforcing steel (2) and ground tackle (3), and jack (1) is set between reaction beam (4) and counter-force post, the post that fractureed is applied superpower horizontal applied force, it is fractureed.
4. steel bar concrete according to claim 1 and 2 and masonry structure building dismantling prestressing method is characterized in that also can directly applying superpower horizontal applied force to the post that fractureed at other reaction frame and the jack of only being provided with of the post that fractureed, and it is fractureed.
5. steel bar concrete according to claim 1 and masonry structure building dismantling prestressing method is characterized in that selecting in masonry structure building some walls as being removed wall, as counter force wall, apply horizontal applied force to being removed wall with its contiguous wall.
6. steel bar concrete according to claim 5 and masonry structure building dismantling prestressing method, it is characterized in that being removed cross counter-force girder steel (11), prestressed reinforcement (12), ground tackle (13) are set on the body of wall (10), on its contiguous body of wall (14), counter-force steel column (15) is set, counter-force girder steel (16), jack (17), presstressed reinforcing steel (12), ground tackle equipment such as (13), and counter-force steel column (15) reliably is connected with original collar tie beam (18) or superstructure, then, apply horizontal applied force to being removed body of wall (10).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98111404 CN1202563A (en) | 1998-07-10 | 1998-07-10 | Prestress dismantling method for building of steel reinforced concrete and block structure |
| CN 98111500 CN1081275C (en) | 1998-07-10 | 1998-09-18 | Method for dismantling prestressing of reinforced concrete and masonry construction building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98111404 CN1202563A (en) | 1998-07-10 | 1998-07-10 | Prestress dismantling method for building of steel reinforced concrete and block structure |
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| Publication Number | Publication Date |
|---|---|
| CN1202563A true CN1202563A (en) | 1998-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98111404 Pending CN1202563A (en) | 1998-07-10 | 1998-07-10 | Prestress dismantling method for building of steel reinforced concrete and block structure |
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| Country | Link |
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| CN (1) | CN1202563A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942907A (en) * | 2010-08-23 | 2011-01-12 | 重庆城建控股(集团)有限责任公司 | Manual disassembling technology of high-skylight cross beam |
| CN102720374A (en) * | 2012-06-02 | 2012-10-10 | 中色十二冶金建设有限公司 | Method for removing masonry-concrete structure wall |
| CN107419918A (en) * | 2017-07-27 | 2017-12-01 | 上海二十冶建设有限公司 | A kind of Historical Buildings periphery single-layer frame retains method for dismounting |
| CN109736592A (en) * | 2019-01-15 | 2019-05-10 | 湖南厚德重工机械有限公司 | One kind tearing building machine open |
| CN109779290A (en) * | 2019-01-21 | 2019-05-21 | 哈尔滨工业大学 | A kind of dismounting brick masonry wall piece prestressed anchor clamping method |
| CN111561175A (en) * | 2020-05-27 | 2020-08-21 | 上海标架建筑科技有限公司 | Prestress underpinning static force cutting and column pulling construction process |
| CN115182594A (en) * | 2022-07-21 | 2022-10-14 | 鲁班软件股份有限公司 | Longitudinal member cross-layer steel bar blanking method |
| CN117266626A (en) * | 2023-11-23 | 2023-12-22 | 北京市第三建筑工程有限公司 | Method for dismantling top floor slab of high-rise building by synchronously dismantling beam plates |
-
1998
- 1998-07-10 CN CN 98111404 patent/CN1202563A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942907A (en) * | 2010-08-23 | 2011-01-12 | 重庆城建控股(集团)有限责任公司 | Manual disassembling technology of high-skylight cross beam |
| CN102720374A (en) * | 2012-06-02 | 2012-10-10 | 中色十二冶金建设有限公司 | Method for removing masonry-concrete structure wall |
| CN102720374B (en) * | 2012-06-02 | 2014-12-17 | 中色十二冶金建设有限公司 | Method for removing masonry-concrete structure wall |
| CN107419918B (en) * | 2017-07-27 | 2019-06-14 | 上海二十冶建设有限公司 | A kind of Historical Buildings periphery single-layer frame retains method for dismounting |
| CN107419918A (en) * | 2017-07-27 | 2017-12-01 | 上海二十冶建设有限公司 | A kind of Historical Buildings periphery single-layer frame retains method for dismounting |
| CN109736592A (en) * | 2019-01-15 | 2019-05-10 | 湖南厚德重工机械有限公司 | One kind tearing building machine open |
| CN109779290A (en) * | 2019-01-21 | 2019-05-21 | 哈尔滨工业大学 | A kind of dismounting brick masonry wall piece prestressed anchor clamping method |
| CN111561175A (en) * | 2020-05-27 | 2020-08-21 | 上海标架建筑科技有限公司 | Prestress underpinning static force cutting and column pulling construction process |
| CN111561175B (en) * | 2020-05-27 | 2021-12-14 | 上海标架建筑科技有限公司 | Prestress underpinning static force cutting and column pulling construction process |
| CN115182594A (en) * | 2022-07-21 | 2022-10-14 | 鲁班软件股份有限公司 | Longitudinal member cross-layer steel bar blanking method |
| CN115182594B (en) * | 2022-07-21 | 2023-12-29 | 鲁班软件股份有限公司 | Longitudinal member cross-layer steel bar blanking method |
| CN117266626A (en) * | 2023-11-23 | 2023-12-22 | 北京市第三建筑工程有限公司 | Method for dismantling top floor slab of high-rise building by synchronously dismantling beam plates |
| CN117266626B (en) * | 2023-11-23 | 2024-04-05 | 北京市第三建筑工程有限公司 | Method for dismantling top floor slab of high-rise building by synchronously dismantling beam plates |
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