CN107964976A - Steel pipe-conversion steel platform tower crane top-down construction method - Google Patents

Steel pipe-conversion steel platform tower crane top-down construction method Download PDF

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Publication number
CN107964976A
CN107964976A CN201711189936.3A CN201711189936A CN107964976A CN 107964976 A CN107964976 A CN 107964976A CN 201711189936 A CN201711189936 A CN 201711189936A CN 107964976 A CN107964976 A CN 107964976A
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CN
China
Prior art keywords
steel pipe
tower crane
stand
conversion
stand steel
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Pending
Application number
CN201711189936.3A
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Chinese (zh)
Inventor
王慧文
黄晖
方键
张伟
陈良
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Changzhou No1 Construction Group Co Ltd
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Changzhou No1 Construction Group Co Ltd
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Priority to CN201711189936.3A priority Critical patent/CN107964976A/en
Publication of CN107964976A publication Critical patent/CN107964976A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same

Abstract

The present invention provides a kind of steel pipe conversion steel platform tower crane top-down construction method, including step:1. tower crane stand steel pipe positions;2. open up priming concrete pile hole;3. filling pile cage of reinforcement is fixedly connected with stand steel pipe;4. stand steel pipe installs fixation in priming concrete pile hole;5. pour cast-in-place pile concrete;6. stand steel pipe upper end tube nozzle installs connecting flange and floor of putting more energy into;7. installation conversion steel platform;8. tower crane is installed;9. pit earthwork excavation and successively bracing piece between mounting bracket steel pipe;10. underground ground engineering is constructed and tower crane is removed.It is to have completed to install to be excavated preceding in building earthwork engineering of foundation pit the invention enables tower crane, without the road input of tower crane installation, cost of water treatment during earthwork construction can be greatly reduced, and significantly save the foundation construction duration.

Description

Steel pipe-conversion steel platform tower crane top-down construction method
Technical field
The present invention relates to the tower crane construction method of installation in large-scale construction engineering, and in particular to a kind of steel pipe-conversion steel is put down Platform tower crane top-down construction method.
Background technology
With social development, land resource growing tension so that large-scale tall buildings thing is on the increase, large-scale tall buildings Underground reinforced concrete foundation engineering it is also more and more deeper.The construction of building be unable to do without tower crane equipment, tower crane equipment Installation is needed in building site setting place pre-installation tower crane installation foundation, and the passing road for transport tower crane equipment.Often at present The method of tower crane is installed on the building building site seen is:The pit earthwork of building underground engineering is first excavated until base Hole earthwork construction finishes, then tower crane is set on the basis of foundation pit, and tower crane is then fixedly mounted on tower crane;It is such The practice there are the problem of have two:First, tower crane equipment conveying path problem, due at tower crane mount point and its surrounding earthwork Dig and finish, to solve to transport tower crane equipment toward setting position in foundation pit, it is necessary to separately set trestle or reserve in earth excavation logical Trade road, removes trestle or digs the road earthwork, its engineering cost is higher and the duration is longer again after tower crane installs;Second, The problem of water process:Tower crane is installed again after integrally being excavated due to underground engineering foundation pit so that precipitation and underground water infiltration(Especially The high place of level of ground water)Processing cost is higher, and equally influences the duration.
The content of the invention
The purpose of the present invention is:For the problems of the prior art, there is provided a kind of steel pipe-conversion steel platform tower crane is inverse Practice construction method, using this method so that tower crane has been completed to install before building earthwork engineering of foundation pit excavates, from Without the road input of tower crane installation, cost of water treatment during earthwork construction is greatly reduced, and significantly saves basis and applies The work duration.
The technical scheme is that:Steel pipe-conversion steel platform tower crane top-down construction method of the present invention, including Following steps:
1. tower crane stand steel pipe positions:Tower crane installation site is determined on building site ground according to design, according to definite tower crane installation position Put and tower crane inherent parameters, be accordingly determined as the installation site of 4 stand steel pipe of the main body of tower crane installation foundation;
2. open up priming concrete pile hole:In the aperture that the installed position of 4 definite stand steel pipe is determined according to design and depth, with brill Hole perfusion column machine opens up 4 priming concrete pile holes and pore-forming;
3. filling pile cage of reinforcement is fixedly connected with stand steel pipe:The lower part of above-mentioned stand steel pipe is as embedding part, the length of embedding part Degree is determined according to design;Stand steel pipe above embedding part setting position be fixed with seal plate;The embedding part of stand steel pipe Circumferentially-spaced be equipped with slurry outlet of several through holes when being poured as poured pile;On the embedding part of 4 stand steel pipe respectively Poured pile steel reinforcement cage is fixedly installed;
4. stand steel pipe installs fixation in priming concrete pile hole:4 stand steel pipe for setting filling pile cage of reinforcement are embedded to it Mode of the portion under is placed in 4 priming concrete pile holes, and the setting height so that the upper end tube nozzle of 4 stand steel pipe is above the ground level, school Each stand steel pipe is fixed after the verticality of accurate each stand steel pipe;
5. pour cast-in-place pile concrete:Concrete delivery conduit is stretched into stand steel pipe from the upper end tube nozzle of stand steel pipe, pours filling Pile concrete is noted, the concrete grout poured into enters priming concrete pile hole, concrete placings to filling from each through hole on the embedding part of stand steel pipe Note stake holes mouth stops pouring and being irrigated column concrete curing, forms bored concrete pile;
6. stand steel pipe upper end tube nozzle installs connecting flange and floor of putting more energy into:It is welded and fixed in the upper end tube nozzle of every stand steel pipe Connecting flange is installed, setting is welded between connecting flange and the upper end outer wall of stand steel pipe and is put more energy into floor;
7. installation conversion steel platform:To there is the conversion steel platform of 4 flanges by its 4 methods by what is be made outside the venue according to design It is blue with being fixedly arranged on after 4 connecting flanges of 4 stand steel pipe upper ports docks, be fixedly connected with high-strength bolt, so as to will change Steel platform is removably secured in stand steel pipe;
8. tower crane is installed:Tower crane is fixedly mounted in the upper end of conversion steel platform;
9. pit earthwork excavation and successively bracing piece between mounting bracket steel pipe:Excavate the building foundation pit earthwork burying to stand steel pipe Enter the stopping of portion upper end;In pit earthwork digging process, after the completion of every layer of earth excavation, the stand steel pipe periphery exposed is removed Concrete block and dregs so that stand steel pipe is completely exposed, and from top to bottom gradually welding is arranged on the reinforcement between each stand steel pipe Bar;
10. underground ground engineering is constructed and tower crane is removed:Gradually carry out building underground and ground engineering is constructed to engineering and finished Afterwards, tower crane, conversion steel platform and the stand steel pipe do not buried are from top to bottom removed successively.
Further scheme is:Above-mentioned steps 3. in, filling pile cage of reinforcement include vertically disposed vertical bars, it is horizontally disposed and It is welded in the stirrup of each vertical bars periphery and dowel that is horizontally disposed and being welded with vertical bars, above-mentioned vertical bars, stirrup and dowel Material be reinforcing bar;The radical of vertical bars and interval, the number of plies at the road number of stirrup and interval and dowel and interval are according to design Determine;Every layer of dowel is welded with stand steel pipe.
Further scheme is:Above-mentioned every layer of dowel is made of 4 reinforcing bars, every in 4 reinforcing bars of every layer of dowel The both ends of root reinforcing bar are welded with corresponding vertical bars, and 4 reinforcing bars of every layer of dowel by it, each with stand steel pipe weld by middle part.
Further scheme is:Above-mentioned steps 7. in, above-mentioned conversion steel platform include 2 each other in cross fix connect Connect girder steel;Above-mentioned 4 flanges are in the respectively fixed setting 1 of 2 terminations lower face of above-mentioned 2 girder steels;The both sides of every girder steel are set There is reinforcing plate;Stiffener is each equipped between flange and the end of corresponding girder steel.
Further scheme is:Above-mentioned steps 9. in, above-mentioned bracing piece includes the bracing piece that laterally sets and angularly disposed Bracing piece;Bracing piece is welded and fixed with stand steel pipe by connection otic placode and is connected.
Further scheme is:The material of above-mentioned bracing piece is angle steel;After the completion of bracing piece welding, by all steel surfaces Brush antirust paint after derusting.
Further scheme is:Above-mentioned steps 10. in, above-mentioned building underground and the ground engineering of gradually carrying out is constructed to work The specific steps that journey finishes include:
In bottom of foundation ditch upper surface, blinding layer is set;
Base isolation system is set on above-mentioned blinding layer, in the seal plate buried foundation raft plate of stand steel pipe fixed setting;Basis The steel pipe that stand steel pipe is located at fixed length above its embedding part by bed course and Base isolation system surrounds covering;
Underground structure floor slab construction, resigning box out at stand steel pipe is met during construction;
Surface works construction is to finishing;
The above-mentioned specific steps bag for from top to bottom removing tower crane, conversion steel platform and the stand steel pipe dismounting tower crane not buried successively Include:
Tower crane is removed from conversion steel platform;
Conversion steel platform and the high-strength bolt of stand steel pipe upper end are released, conversion steel platform is removed from stand steel pipe;
Stand steel pipe is cut off from the upper end surface of above-mentioned Base isolation system.
The present invention has positive effect:(1)Steel pipe-conversion steel platform tower crane reverse construction side of the present invention Method, it, by the pre-buried steel pipe for being used as tower crane installation foundation main body, carries out tower crane conversion steel immediately in the engineering pile foundation construction stage The installation of platform and tower crane equipment so that tower crane has been completed to install before building earth work is excavated, earth excavation After be not required to consider in the prior art tower crane installation passing road offering question, engineering cost can be greatly reduced and shorten the construction period.(2) Steel pipe-conversion steel platform tower crane top-down construction method of the present invention, its tower crane have been completed before earth work is excavated Installation, thus the water process in its earth work only needs to be carried out according to earth excavation progress, and engineering can be greatly decreased and throw early period Entering cost can simultaneously save the duration.(3)Steel pipe using the present invention-conversion steel platform tower crane top-down construction method so that Tower crane is quick and easy for installation, safe and reliable, and changes steel platform and repeat recycling, energy conservation and environmental protection.
Brief description of the drawings
Fig. 1 is flow chart of the method for the present invention;
Fig. 2 is the embedding part and filling pile cage of reinforcement attachment structure schematic diagram of the stand steel pipe employed in embodiment;
Fig. 3 is sectional view along A-A in Fig. 2;
Fig. 4 is the structure diagram of the tower crane installation foundation that installation is complete after building foundation pit earth excavation in embodiment;
Fig. 5 is the right view of Fig. 4;
Fig. 6 is a kind of structure diagram of the conversion steel platform employed in embodiment;
Fig. 7 is B-B direction sectional view in Fig. 6;
Fig. 8 be in Fig. 6 C-C to sectional view;
Fig. 9 is the position of the tower crane installation foundation and building underground engineering dependency structure that installation is complete employed in embodiment Or installation relation schematic diagram.
Reference numeral in above-mentioned attached drawing is as follows:
Stand steel pipe 1, through hole 11;Filling pile cage of reinforcement 2, vertical bars 21, stirrup 22, dowel 23;Connecting flange 3, floor of putting more energy into 31;Change steel platform 4, girder steel 41, reinforcing plate 41-1, flange 42, stiffener 42-1;Bracing piece 5, connection otic placode 51;Seal plate 6;Bored concrete pile 7;
Blinding layer 100, Base isolation system 101, underground structure floor 102.
Embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
(Embodiment 1)
The steel pipe of the present embodiment-conversion steel platform tower crane top-down construction method, is generally applicable to be not provided with trestle or pre- Stay tower crane installation road, and the building underground engineering construction that level of ground water is higher.The technical thinking of method and road Line is:In the engineering pile foundation construction stage, in advance in ground construction tower crane stand steel pipe and corresponding bored concrete pile, then in stent steel Carry out on ground the installation of conversion steel platform and tower crane on the basis of pipe, tower crane carries out earth excavation after installation is complete again.
See Fig. 1, the steel pipe-conversion steel platform tower crane top-down construction method of the present embodiment, it is mainly by following step It is rapid to implement:
1. tower crane stand steel pipe positions:Tower crane installation site is determined on the ground of building site according to design, according to definite tower crane position And tower crane inherent parameters, accordingly it is determined as the installation sites of 4 stand steel pipe 1 of tower crane installation foundation main body.
2. open up priming concrete pile hole:In the aperture that the installed position of 4 definite stand steel pipe 1 is determined according to design and depth Degree, 4 priming concrete pile holes and pore-forming are opened up with bored pile machine.
3. filling pile cage of reinforcement is fixedly connected with stand steel pipe:As shown in Figures 2 to 5, the lower part of stand steel pipe 1 is used as and buries Enter portion, the length of embedding part is determined according to design;In stand steel pipe 1 above embedding part setting position be fixed with seal plate 6;The circumferentially-spaced of the embedding part of stand steel pipe 1 is equipped with several through holes 11, slurry outlet when being poured as poured pile;At 4 Poured pile steel reinforcement cage 2 is fixedly installed on the embedding part of stand steel pipe 1 respectively, filling pile cage of reinforcement 2 is by vertical bars 21, stirrup 22 and connects Muscle 23 is connect to form, the materials of vertical bars 21, stirrup 22 and dowel 23 is reinforcing bar, vertical bars 21 are vertical uniform be interval with it is some Root, if stirrup 22 is from top to bottom equipped with arterial highway, if 23 dried layer of dowel;Per pass stirrup 22 is welded with the periphery of each vertical bars 21; Every layer of dowel 23 is made of 4 reinforcing bars, and the both ends of every reinforcing bar in 4 reinforcing bars of every layer of dowel 23 are erected with corresponding Muscle 21 welds, and the middle part of every reinforcing bar in 4 reinforcing bars of every layer of dowel 23 is welded with stand steel pipe 1;So that fill On the periphery wall for the embedding part that note pile cages 2 are fixedly mounted on stand steel pipe 1.The radical of vertical bars 21 and interval, stirrup 22 The number of plies of road number and interval and dowel 23 and interval are determined according to design.
4. stand steel pipe installs fixation in priming concrete pile hole:By 4 stand steel pipe 1 for setting filling pile cage of reinforcement 2 with Mode of its embedding part under is placed in 4 priming concrete pile holes, and the setting so that the upper end tube nozzle of 4 stand steel pipe 1 is above the ground level Highly, each stand steel pipe 1 is fixed after calibrating the verticality of each stand steel pipe 1.
5. pour cast-in-place pile concrete:The upper end tube nozzle of concrete delivery conduit from stand steel pipe 1 is stretched into stand steel pipe 1, Cast-in-place pile concrete is poured, the concrete grout poured into enters priming concrete pile hole, concrete from each through hole 11 on the embedding part of stand steel pipe 1 Pour to bored concrete pile aperture and stop pouring and be irrigated column concrete curing, form bored concrete pile 7.
6. stand steel pipe upper end tube nozzle installs connecting flange and floor of putting more energy into:In the upper end tube nozzle weldering of every stand steel pipe 1 Connect and connecting flange 3 is fixedly mounted, setting is welded between connecting flange 3 and the upper end outer wall of stand steel pipe 1 and is put more energy into floor 31, is such as schemed 4th, shown in Fig. 5.
7. installation conversion steel platform:The conversion steel platform 4 installed is according to designing by being made outside the venue, such as Fig. 6 to Fig. 8
Shown, conversion steel platform 4 is mainly made of 2 girder steels 41 and 4 flanges 42, and two girder steels 41 are consolidated in cross each other Fixed connection;4 flanges 42 are in the respectively fixed setting 1 of 2 terminations lower face of 2 girder steels 41;The both sides of every girder steel 41 are equipped with Connect the reinforcing plate 41-1 of 41 upper and lower ends of girder steel;Stiffener is each equipped between flange 42 and the end of corresponding girder steel 41 42-1;When changing steel platform 4 and installing, by 4 flanges 42 for changing steel platform 4 and 41 upper ports of stand steel pipe are fixed at After 4 connecting flanges 3 dock, it is fixedly connected with high-strength bolt, so as to being removably secured conversion steel platform 4 installed in stent On steel pipe 1.
8. tower crane is installed:Tower crane is fixedly mounted in the upper end of conversion steel platform 4.
9. pit earthwork excavation and successively bracing piece between mounting bracket steel pipe:The building foundation pit earthwork is excavated, in foundation pit earth In square digging process, after the completion of every layer of earth excavation, the concrete block and dregs of 1 periphery of stand steel pipe exposed are removed so that Stand steel pipe is completely exposed, and from top to bottom gradually welding is arranged on the bracing piece 5 between each stand steel pipe 1, and bracing piece 5 includes laterally setting The bracing piece 5 and angularly disposed bracing piece 5, bracing piece 5 put are welded and fixed with stand steel pipe 1 by connection otic placode 51 and are connected; Preferably, the material of bracing piece 5 is angle steel;Preferably, after the completion of welding, brush antirust paint after all steel surfaces are derusted;Soil The embedding part upper end that side is dug to stand steel pipe 1 stops, and retains the bored concrete pile 7 of 1 embedding part of stand steel pipe.After the completion of excavation of foundation pit Structure as shown in Figure 4 and Figure 5, wherein 4 filling pile cage of reinforcement 2,4 of stand steel pipe 1,4 connecting flanges 3, some reinforcement Bar 5 and 4 bored concrete piles 7 form tower crane installation foundation.
10. underground ground engineering is constructed and tower crane is removed:Gradually progress building underground and ground engineering are constructed complete to engineering Bi Hou, from top to bottom removes tower crane, conversion steel platform and the stand steel pipe do not buried successively.Specifically, such as Fig. 9, in bottom of foundation ditch Upper surface sets blinding layer 100, and Base isolation system 101, the sealing that stand steel pipe 1 is fixedly installed are set on blinding layer 100 In 6 buried foundation raft plate 101 of plate;Stand steel pipe 1 is located at fixed length above its embedding part by blinding layer 100 and Base isolation system 101 Steel pipe surround covering;Then carry out underground structure floor 102 again to construct, underground structure floor 102 meets stand steel pipe when constructing Locate resigning box out;Then surface works construction is carried out to finishing, and is removed tower crane, is then released conversion steel platform 4 and stand steel pipe The high-strength bolt of upper end, conversion steel platform 4 recycle and reuse;Stand steel pipe 1 is cut from the upper end surface of Base isolation system 101 Remove, recycle;Finally carry out institute's box out mouth and the box out mouth processing of 102 resigning institutes of underground structure floor after stand steel pipe 1 is cut off.
Above example is the explanation to the embodiment of the present invention, rather than limitation of the present invention, related technology The technical staff in field without departing from the spirit and scope of the present invention, can also make various conversion and change and obtain To corresponding equivalent technical solution, therefore all equivalent technical solutions should be included into the patent protection model of the present invention Enclose.

Claims (7)

  1. A kind of 1. steel pipe-conversion steel platform tower crane top-down construction method, it is characterised in that:Comprise the following steps:
    1. tower crane stand steel pipe positions:Tower crane installation site is determined on building site ground according to design, according to definite tower crane installation position Put and tower crane inherent parameters, be accordingly determined as the installation site of 4 stand steel pipe of the main body of tower crane installation foundation;
    2. open up priming concrete pile hole:In the aperture that the installed position of 4 definite stand steel pipe is determined according to design and depth, with brill Hole perfusion column machine opens up 4 priming concrete pile holes and pore-forming;
    3. filling pile cage of reinforcement is fixedly connected with stand steel pipe:The lower part of the stand steel pipe is as embedding part, the length of embedding part Degree is determined according to design;Stand steel pipe above embedding part setting position be fixed with seal plate;The embedding part of stand steel pipe Circumferentially-spaced be equipped with slurry outlet of several through holes when being poured as poured pile;On the embedding part of 4 stand steel pipe respectively Poured pile steel reinforcement cage is fixedly installed;
    4. stand steel pipe installs fixation in priming concrete pile hole:4 stand steel pipe for setting filling pile cage of reinforcement are embedded to it Mode of the portion under is placed in 4 priming concrete pile holes, and the setting height so that the upper end tube nozzle of 4 stand steel pipe is above the ground level, school Each stand steel pipe is fixed after the verticality of accurate each stand steel pipe;
    5. pour cast-in-place pile concrete:Concrete delivery conduit is stretched into stand steel pipe from the upper end tube nozzle of stand steel pipe, pours filling Pile concrete is noted, the concrete grout poured into enters priming concrete pile hole, concrete placings to filling from each through hole on the embedding part of stand steel pipe Note stake holes mouth stops pouring and being irrigated column concrete curing, forms bored concrete pile;
    6. stand steel pipe upper end tube nozzle installs connecting flange and floor of putting more energy into:It is welded and fixed in the upper end tube nozzle of every stand steel pipe Connecting flange is installed, setting is welded between connecting flange and the upper end outer wall of stand steel pipe and is put more energy into floor;
    7. installation conversion steel platform:To there is the conversion steel platform of 4 flanges by its 4 methods by what is be made outside the venue according to design It is blue with being fixedly arranged on after 4 connecting flanges of 4 stand steel pipe upper ports docks, be fixedly connected with high-strength bolt, so as to will change Steel platform is removably secured in stand steel pipe;
    8. tower crane is installed:Tower crane is fixedly mounted in the upper end of conversion steel platform;
    9. pit earthwork excavation and successively bracing piece between mounting bracket steel pipe:Excavate the building foundation pit earthwork burying to stand steel pipe Enter the stopping of portion upper end;In pit earthwork digging process, after the completion of every layer of earth excavation, the stand steel pipe periphery exposed is removed Concrete block and dregs so that stand steel pipe is completely exposed, and from top to bottom gradually welding is arranged on the reinforcement between each stand steel pipe Bar;
    10. underground ground engineering is constructed and tower crane is removed:Gradually carry out building underground and ground engineering is constructed to engineering and finished Afterwards, tower crane, conversion steel platform and the stand steel pipe do not buried are from top to bottom removed successively.
  2. 2. steel pipe according to claim 1-conversion steel platform tower crane top-down construction method, it is characterised in that:Institute In stating step 3., filling pile cage of reinforcement include vertically disposed vertical bars, stirrup that is horizontally disposed and being welded in each vertical bars periphery with And dowel that is horizontally disposed and being welded with vertical bars, the material of the vertical bars, stirrup and dowel is reinforcing bar;The radical of vertical bars Determined with the number of plies and interval of interval, the road number of stirrup and interval and dowel according to design;Every layer of dowel with stent steel Pipe welds.
  3. 3. steel pipe according to claim 2-conversion steel platform tower crane top-down construction method, it is characterised in that:Institute Every layer of dowel is stated to be made of 4 reinforcing bars, the both ends of every reinforcing bar in 4 reinforcing bars of every layer of dowel with corresponding vertical bars Welding, 4 reinforcing bars of every layer of dowel by it, each with stand steel pipe weld by middle part.
  4. 4. steel pipe according to claim 1-conversion steel platform tower crane top-down construction method, it is characterised in that:Institute In stating step 7., the conversion steel platform includes 2 and is fixedly connected with girder steel in cross each other;4 flanges are described 2 The respectively fixed setting 1 of 2 terminations lower face of root girder steel;The both sides of every girder steel are equipped with reinforcing plate;Each flange with it is corresponding Stiffener is equipped between the end of girder steel.
  5. 5. steel pipe according to any one of claims 1 to 4-conversion steel platform tower crane top-down construction method, its feature It is:The step 9. in, the bracing piece includes the bracing piece that laterally sets and angularly disposed bracing piece;Bracing piece passes through Connection otic placode is welded and fixed with stand steel pipe and is connected.
  6. 6. steel pipe according to claim 5-conversion steel platform tower crane top-down construction method, it is characterised in that:Institute The material for stating bracing piece is angle steel;After the completion of bracing piece welding, brush antirust paint after all steel surfaces are derusted.
  7. 7. steel pipe according to any one of claims 1 to 4-conversion steel platform tower crane top-down construction method, its feature It is:The step 10. in, building underground and the ground engineering of gradually carrying out is constructed the specific steps bag finished to engineering Include:
    In bottom of foundation ditch upper surface, blinding layer is set;
    Base isolation system is set on the blinding layer, in the seal plate buried foundation raft plate of stand steel pipe fixed setting;Basis The steel pipe that stand steel pipe is located at fixed length above its embedding part by bed course and Base isolation system surrounds covering;
    Underground structure floor slab construction, resigning box out at stand steel pipe is met during construction;
    Surface works construction is to finishing;
    The specific steps bag for from top to bottom removing tower crane, conversion steel platform and the stand steel pipe dismounting tower crane not buried successively Include:
    Tower crane is removed from conversion steel platform;
    Conversion steel platform and the high-strength bolt of stand steel pipe upper end are released, conversion steel platform is removed from stand steel pipe;
    Stand steel pipe is cut off from the upper end surface of the Base isolation system.
CN201711189936.3A 2017-11-24 2017-11-24 Steel pipe-conversion steel platform tower crane top-down construction method Pending CN107964976A (en)

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CN111424648A (en) * 2020-04-15 2020-07-17 中国二十二冶集团有限公司 Construction method for simultaneously hoisting steel column and cast-in-place pile reinforcement cage in reverse construction

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CN111424648A (en) * 2020-04-15 2020-07-17 中国二十二冶集团有限公司 Construction method for simultaneously hoisting steel column and cast-in-place pile reinforcement cage in reverse construction

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Application publication date: 20180427