CN105604248A - Steel pipe column barrel butting protection welding method for steel pipe column - Google Patents
Steel pipe column barrel butting protection welding method for steel pipe column Download PDFInfo
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- CN105604248A CN105604248A CN201610169026.8A CN201610169026A CN105604248A CN 105604248 A CN105604248 A CN 105604248A CN 201610169026 A CN201610169026 A CN 201610169026A CN 105604248 A CN105604248 A CN 105604248A
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- steel pipe
- pipe column
- column casing
- welding
- ring
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Abstract
The invention discloses a steel pipe column barrel butting protection welding method for a steel pipe column. The method comprises the following steps: hoisting a steel pipe column barrel to be welded to the upper end of a lower welded steel pipe column barrel by a tower crane; adjusting; aligning; and then welding. The method is characterized in that before welding, a supporting device is arranged in the position, close to the upper end, of the outside surface of the lower mounted steel pipe column barrel in advance, a protection device is supported by the supporting device, a circle of protection cloth is arranged in the protection device to surround the welding position in the protection cloth, and workers perform welding operation by virtue of support of the supporting device. The method disclosed by the invention has the advantages of increasing the welding safety, increasing the welding quality, avoiding interference to surrounding workers caused by welding, and the like.
Description
Technical field
The invention belongs to high building project construction field, be specifically related to a kind of steel pipe column casing docking protection welding method of steel pipe column.
Background technology
Core wall structure, belongs to high building structure. Be exactly simply, periphery is the frame stressing system being made up of beam column, and centre is cylindrical shell (such as elevator), because cylindrical shell, in centre, so be called Core Walls Structure, has another name called " framework-core wall structure ". This kind of structure is extremely conducive to structure stress, and has extremely excellent shock resistance. The main flow version that high-rise building extensively adopts in the world. Meanwhile, the superiority of this structure is also to strive for the spacious usage space of trying one's best, and makes various assistant services space in the centralized of plane, makes the daylighting position of function of tonic chord volume exclusion the best, and reaches that sight line is good, the convenient effect of internal transportation. In core wall structure, as the beam column construction of main load effect, generally build with armored concrete, need to possess higher intensity and load requirement simultaneously.
Steel pipe column (being steel core concrete column) refers to, fill concrete in steel pipe and form and steel pipe and core concrete thereof can bear the architectural support structure member of external load effect jointly, press section form difference, can be divided into concrete filled steel tube and quadrate steel pipe column etc., in steel pipe column, steel pipe makes concrete in three dimension stress state to the concrete effect of contraction in its inside, has improved concrete compression strength; The concrete of steel duct can prevent again steel pipe generation cripling effectively. Research shows, the bearing capacity of steel pipe column is higher than corresponding steel pipe column bearing capacity and concrete column bearing capacity sum. Interaction between steel pipe and concrete makes the concrete destruction of steel duct change plastic failure into by brittle break, and the ductile performance of member is obviously improved, and energy dissipation capacity improves greatly, has superior anti-seismic performance.
Due to the above-mentioned advantage of steel pipe column, therefore the beam column construction of Core Walls Structure usually adopts steel pipe column structure to obtain in skyscraper especially high-rise building. But in skyscraper especially high-rise building, adopt the Core Walls Structure beam column construction load of steel pipe column large, and high to various aspects of performance requirement, therefore still there are a lot of difficult points in design and work progress.
The application number that applicant once applied for is 201410392150.1 patent, discloses a kind of Large-diameter Steel tubing string suspension column construction method of installation, and it can guarantee steel pipe column suspension column construction quality, can be for the suspension column construction of Core Walls Structure beam column construction steel pipe column.
Simultaneously, for convenient construction, applicant considers that corresponding quadrate steel pipe column structure on suspension column every layer of architecture storey all designed to a joint forms more piece monolayer steel pipe post, complete from top to bottom successively every joint monolayer steel pipe post construction, when every joint monolayer steel pipe post construction, adopt the outer construction that is provided with the steel pipe column casing on bracket basis and completes bracket on this layer of steel pipe column; Bracket basis comprises between the upper and lower and is horizontally disposed annular steel facing every two that are fixedly welded on steel pipe column tube outer surface, also comprise that one section of cross section that annular steel facing peripheral direction is horizontally outward welded and fixed is the i shaped steel of I-shaped, also comprise the members such as the beam steel, stirrup, waist muscle, card muscle and the arched ribs that are arranged on annular steel facing and i shaped steel. Like this, the conveniently construction to each layer of building, the bracket basis simultaneously arranging can be improved the node strength that steel pipe column is connected with crossbeam well.
Wherein, when the concrete handling installation of steel pipe column casing of every layer, applicant considers to adopt tower crane to carry out handling and makes steel pipe column casing to be installed in vacant state, reserve weld seam first by arrange bus and jack regulate aim at after carry out again welded and installed, but when welding, how to improve Welding Safety, and improve welding quality, become the problem that needs to be considered solution.
Summary of the invention
For above-mentioned the deficiencies in the prior art, technical problem to be solved by this invention is: how to provide one can improve Welding Safety, improve welding quality, avoid the steel pipe column casing docking protection welding method of welding to the steel pipe column that workman interferes around.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of steel pipe column casing docking protection welding method of steel pipe column; this method by tower crane by steel pipe column casing to be welded handling to below welded still pipe column casing upper end and adjust aim at after welding; it is characterized in that; before welding first below mounted steel pipe column casing lateral surface near upper end position, bracing or strutting arrangement is set; support protector is set by bracing or strutting arrangement again; in protector, have a circle protective cloth welding position is enclosed in protective cloth, workman relies on the support of bracing or strutting arrangement to carry out welding operation again.
Like this, lean on bracing or strutting arrangement to realize workman's welding operation is supported, by bracing or strutting arrangement, the protector with protective cloth is set simultaneously, can realize the protection of welding scene, improve Welding Safety, avoided welding to workman's interference around.
As optimization, described bracing or strutting arrangement, comprise the anchor ear sheet of two sections of arcs, anchor ear sheet arc and anchor ear sheet two ends consistent with steel pipe column casing lateral surface arc stretch out and form anchor ear connecting portion, on anchor ear connecting portion, be provided with bolt hole and dock by connecting bolt, two sections of anchor ear sheets are along being circumferentially relatively closely attached on after steel pipe column casing lateral surface, between relative anchor ear connecting portion, leave the gap that is less than connecting bolt length, and for anchor ear sheet being held tightly and is fixed to steel pipe column casing lateral surface through bolt hole docking by connecting bolt, every section of anchor ear sheet lateral surface is at least fixedly installed two horizontal support member of horizontally outward extending.
The bracing or strutting arrangement arranging like this can help the operation of workman's supported standing better, and support device structure is simple, fixing reliable, easy to operate, and welding person can carry out steel pipe column cylinder leveling operation under safety rope protection on standing support device. Further, horizontal support member obtains for support angle steel is welded to anchor ear sheet lateral surface. Again further, horizontal support member outer end face has the mounting column being fixedly installed straight up.
As optimization, described protective device structure comprises the top coat structure that is positioned at the bottom surface layer structure of below and is positioned at top, bottom surface layer structure comprises around ring outside ring and bottom surface in the bottom surface of steel pipe column casing circumferential lateral surface setting, in bottom surface, outside ring and bottom surface, between ring, level is fixedly connected with some bottom surfaces connector, top coat structure comprises ring and the outer ring of end face in the end face arranging around steel pipe column casing circumferential lateral surface, in end face, between the outer ring of ring and end face, level is fixedly connected with some end face connectors, in described bottom surface, in ring and end face, between ring, be also vertically fixedly connected with some inner side studs that are uniformly distributed circumferentially, outside described bottom surface, between the outer ring of ring and end face, be also vertically fixedly connected with some outside studs that are uniformly distributed circumferentially, outside stud outer surface is also around being arranged with a circle protective cloth.
Like this, protector can improve the individual processing safety of welding, simultaneously protective cloth can windbreak function to ensure welding quality, also can play in addition shaded effect, prevent from welding high light and leak, effectively avoided light pollution to avoid the impact of welding on other construction workman of below.
Further, bottom surface layer structure, top coat structure, inner side stud and outside stud are ferrous materials and make, and are weldingly connected and ensure self intensity to facilitate. Further, outside bottom surface, in ring, the mounting column of the horizontal support member outer end of corresponding bracing or strutting arrangement is provided with the installing hole of coupling, facilitates the installation of protector on bracing or strutting arrangement to be located by connecting. Further, offer screw and be connected with carrying bolt on the stud of inner side, the two ends that carrying bolt is positioned at screw are respectively provided with a locking nut. Like this, can be after protector be installed on bracing or strutting arrangement, tighten carrying bolt and make its inner push against steel pipe column tube outer surface, then by two relative rotational locks of locking nut; Can ensure that protector is upwards tightened to steel pipe column tube outer surface along week, reduce shake, improve high-altitude application security and ensure welding quality. Protective cloth is colour bar cloth further, improves work high above the ground alarming effect. On the stud of outside, also edge is circumferentially enclosed mutually and is connected with safety rope further, to improve better high-altitude working safety.
As optimization, the step that described adjustment is aimed at, specifically comprises, by tower crane, steel pipe column casing to be installed is sling to mounted steel pipe column casing top just to position; There are separately two control bus along the vertical setting of the radian of the quadrant of being upwards separated by week at steel pipe column casing lateral surface near top and bottom place, in the time adjusting unsettled steel pipe column casing position, outside the control bus of unsettled steel pipe column casing, side-lower sets up two theodolites, observe taking bus as benchmark by theodolite in the time that two buses of the unsettled outside lower portion of steel pipe column casing all align point-blank with two buses of the below outside upper portion of mounted steel pipe column casing separately, judge unsettled leveling of steel pipe column casing position aligning.
Like this, below steel pipe column casing, in two orthogonal directions, adopt the bus of theodolite observe and decide setting whether all to judge whether upper and lower steel pipe column casing is aimed at point-blank, can simple and fast and accurately auxiliary realization aim at judgement, improve the accuracy that steel pipe column casing is aimed at, ensure that the beam column axial line obtaining after docking is consistent, ensure beam column quality.
As optimization, be welded with separately near end four otic placodes that horizontally outward extend that are uniformly distributed circumferentially at the upper and lower two ends of steel pipe column casing, be arranged in four otic placodes of steel pipe column casing upper end, otic placode outer end also has the gripper shoe being fixedly installed straight up, the part formation jack horizontal support portion that gripper shoe upper end exceeds position, steel pipe column casing upper surface and exceeds, simultaneously in the time adjusting unsettled steel pipe column casing position, two vertical jack apical graftings that arrange are installed to steel pipe column casing top in two otic placodes of the bottom of unsettled steel pipe column casing corresponding tilt direction both sides and below separately between just right two otic placodes, again by two horizontally disposed jack radially apical grafting installed in below between the jack horizontal support portion of gripper shoe and the lower side surface of unsettled steel pipe column casing of two other otic placode of steel pipe column casing top, rely on and control the flexible of four jack, realize the adjustment of unsettled steel pipe column casing position is realized and aims at leveling.
Like this, rely on two vertical up and down between two pairs of otic placodes of jack apical grafting incline direction that arrange, two jack in addition along back position horizontal radial apical grafting on unsettled steel pipe column lower side surface, can be easily by the adjustment that ejects of jack, the steel pipe column casing of rotation top heeling condition makes it be adjusted to vertical state, have simple to operation and clamping is reliable, regulate the good feature of controllability.
In sum, the present invention has can improve Welding Safety, improves welding quality, avoids welding to advantages such as workman's interference around.
Brief description of the drawings
Fig. 1 is that one has adopted in core tube of high-rise building beam column construction construction method of the present invention, the structural representation sketch of the outer steel pipe column casing that is provided with bracket basis of employing.
Fig. 2 is that one has adopted in core tube of high-rise building beam column construction construction method of the present invention, the structural representation sketch of building servicing unit of employing.
Fig. 3 is the top view of Fig. 2.
Fig. 4 is that one has adopted in core tube of high-rise building beam column construction construction method of the present invention, steel pipe column casing handling alignment procedures schematic diagram.
Fig. 5 is that the schematic diagram of adjusting supplementary structure is aimed in the handling that can show steel pipe column casing docking location in Fig. 4.
Fig. 6 is that one has adopted in core tube of high-rise building beam column construction construction method of the present invention, the structural representation of the bracing or strutting arrangement of employing.
Fig. 7 is the structural representation of monolithic anchor ear sheet in Fig. 6.
Fig. 8 is that one has adopted in core tube of high-rise building beam column construction construction method of the present invention, the structural representation of the protector of employing.
Fig. 9 is the schematic diagram of independent top coat structure in Fig. 8.
Figure 10 is the schematic diagram of independent bottom surface layer structure in Fig. 8.
Figure 11 is that one has adopted in core tube of high-rise building beam column construction construction method of the present invention, the structural representation of the arc mould of employing.
Detailed description of the invention
The present invention is described in further detail to have adopted core tube of high-rise building beam column construction construction method of the present invention and accompanying drawing below in conjunction with one.
A kind of optimum embodiment of core tube of high-rise building beam column construction construction method, this construction method has comprised the step of the suspension column construction of steel pipe column, its feature is, corresponding quadrate steel pipe column structure on suspension column every layer of architecture storey all designed to a joint and form more piece monolayer steel pipe post, complete from top to bottom successively every joint monolayer steel pipe post construction, when every joint monolayer steel pipe post construction, adopt the outer construction that is provided with the steel pipe column casing on bracket basis and completes bracket on this layer of steel pipe column.
Like this, in the time that core tube of high-rise building beam column construction is constructed, adopt the mode of steel pipe column to form beam column construction, can ensure to there is good structural strength, meet skyscraper load-bearing and support requirement. Steel pipe column is designed to corresponding first floor and designs a joint, construction successively from top to bottom, and every joint steel pipe column is outside equipped with bracket basis, is beneficial to realize crossbeam to this floor and the construction of floor by bracket, is beneficial to raising building integral efficiency of construction.
In present embodiment, described bracket is that bracket comprises annular bracket body taking bracket basis as core casting concrete forms, and bracket body surrounding is horizontally outward extended four crossbeams that cross section is rectangular of connection, has and forward extend the beam steel arranging in crossbeam.
Like this, bracket basis can facilitate the setting of bracket and improve intensity, and bracket employing loop configuration, can improve crossbeam and steel pipe column junction bonding strength. Meanwhile, realized the combining structure form of steel core concrete column and reinforced beam, shock resistance is higher, can effectively ensure the transmission of Vierendeel girder internal force, reaches designing requirement.
In present embodiment, described bracket basis as shown in Figure 1, comprise between the upper and lower and be horizontally disposed annular steel facing 2 every two that are fixedly welded on steel pipe column casing 1 outer surface, the annular steel facing upper surface in top is less than bracket body thickness to below annular steel facing lower surface distance, annular steel facing 2 external diameters are less than this body diameter of bracket, annular steel facing 2 peripheral direction are horizontally outward welded with the i shaped steel 3 that one section of cross section is I-shaped, and i shaped steel 3 thickness and width are all less than thickness and the width of crossbeam.
Like this, bracket basis adopts doughnut-shaped steel plate processing shaped steel to form, can improve better follow-up intensity of building the annular bracket obtaining, i shaped steel is as the key foundation of horizontal termination section, greatly improve the bond strength of crossbeam and bracket, improved architecture storey floor entirety weight capacity.
In the bracket basis of present embodiment, the annular steel facing upper surface level of i shaped steel 3 upper surfaces and top is connected, the annular steel facing lower surface level of i shaped steel 3 lower surfaces and below is connected, and improves better the globality on bracket basis to ensure final bracket intensity. further, on i shaped steel 3, be welded with somely along the outward extending beam steel 4 of i shaped steel length direction, facilitate like this setting and the follow-up construction of beam steel. further, beam steel 4 is fixedly welded on the uper side surface separately of i shaped steel 3 upper and lowers to facilitate welding procedure and fixing point to be positioned at the follow-up rear position of conveniently vibrating of building, and structural strength is high, is beneficial to and improves final Building Structure Strength. further, i shaped steel 3 outer surfaces also broad ways are arranged with some stirrups 5, and stirrup 5 is intervally arranged along i shaped steel length direction, can improve better so follow-up structural strength, the stirrup 5 both sides waist muscle 6 that further welding is extended along i shaped steel length direction simultaneously, further to improve structural strength. further, on annular steel facing between i shaped steel 3, be also connected with some card muscle 7, card muscle 7 middle parts are vertical arrange and card muscle upper end bend inwards after clamping be welded and fixed annular steel facing upper surface up, card muscle 7 lower ends bend inwards after clamping and be weldingly fixed on below annular steel facing lower surface, card muscle 7 arranges along annular steel facing outer surface arc uniform interval, card muscle 7 middle part inner surfaces also along continuous straight runs are welded with some arched ribs 8, arched ribs 8 middle parts are and the consistent arc of annular steel facing outer surface radian, arched ribs 8 two ends are fixedly connected on waist muscle 5 after i shaped steel side is folded to, arched ribs 8 is uniformly distributed along short transverse. can improve better like this structural strength of the follow-up bracket obtaining position between crossbeam, and structure bonding strength between crossbeam and bracket.
In present embodiment, in described bracket basis, be positioned at the annular steel facing surface of top and be positioned at i shaped steel 3 uper side surfaces and be provided with the downward perforation 9 for inserting for vibrating spear. Like this, can be beneficial to better bracket pouring construction, improve bracket pouring quality. As optimization, perforation 9 sizes are diameter 50mm, perforation spacings is 100-200mm, the perforation of this dimensional requirement, can supply follow-up building better time, vibrating spear inserts the pouring quality that vibrates to improve node concrete, also the exhaust can be more conducive to vibrate time, can avoid the impact of perforation on structural strength simultaneously.
In present embodiment, every joint monolayer steel pipe post construction specifically comprises the following steps:
A, adopt BIM technology to realize foundation to the each component model of monolayer steel pipe post and to each member blanking, complete annular steel facing in the outer bracket of steel pipe column casing basis and the welding of i shaped steel, complete after construction material is checked and be transported to scene;
B, complete the on-site hoisting welding of steel pipe column casing;
C, set up the support for completing this layer of steel pipe column place floor crossbeam and floor slab construction;
D, to rely on support be that the supporting of the platform bottom surface mould that first completes bracket mould is installed, then complete the welding separately of beam steel, stirrup, waist muscle, card muscle and arched ribs in bracket basis or install fixing; In this process, synchronously complete the concreting in steel pipe column casing;
E, complete again bracket mould side mould supporting install, wherein side mould comprises the arc mould that is used to form the curved side surface of bracket body between crossbeam;
F, complete building of bracket mould inner concrete;
Form removal after g, maintenance.
In above-mentioned a step, BIM technology refers to BIM technology, it is a kind of datumization instrument that is applied to engineering design construction management, integrate the relevant information of various projects by parameter model, in the lifecycle process of project planning, operation and maintenance, share and transmit, make engineers and technicians make correct understanding and efficient reply to various architecture informations, provide the basic existing mature technology of collaborative work for design team and the each side including building unit of operation build main body. Adopt this technology to complete modelling, utilize the bracket blanking and assembled of the auxiliary steel pipe column annular of BIM technology, improve blanking and the installation accuracy of steel pipe bracket, carry out pre-aligned by BIM technology to Large-size rebar in reinforced beam and annular bracket connecting node simultaneously, determine the particular location between reinforcing bar and steel plate, the structural strength that effectively ensures Nodes, can ensure that follow-up construction quality intensity meets the demands better.
Like this, described work progress, to each step overall arrangement, step that can simultaneously operating is synchronously carried out, to save time, improve efficiency of construction, wherein to belong to large-scale component complete in ground welding in advance for annular steel facing and i shaped steel, facilitates welding operation and be beneficial to same steel pipe column casing to complete together handling and install. The small members such as other beam steels, stirrup, waist muscle, card muscle and arched ribs adopt Site Welding to install, and can ensure better its installation site dimensional requirement, with the building structure quality that ensures to obtain. The supporting that first completes bottom surface mould is welded after installing again, can lean on bottom surface module masking pad lower position, improves welding operation security.
Above-mentioned a step, when construction, specifically can comprise following process. A1, preparation construction drawing, set up steel pipe column casing (comprising bracket basis) model by professional BIM engineer, and according to the relation between reinforced beam and bracket basis, draw rebar model, determines reinforcing bar welding position. Do good material prepares simultaneously. The steel pipe column casing of steel pipe column adopts Q345-B steel (killed steel), and otic placode adopts Q235-B steel (killed steel). Selection of electrodes E4315, E4316 and E5015, E5016 type series welding rod. A2, the inspection of raw and process materials; Steel pipe column casing adds man-hour in factory, controls the original material such as steel, welding rod amount well, requires to be configured, and carry out checking and accepting in strict accordance with design drawing; The steel pipe column casing processing is transported to behind scene, carry out the secondary check of size, outward appearance, steel tube component appearance and size (as diameter, length, mouth of pipe circularity etc.) tolerance must not exceed code requirement, and rechecking the satisfied design of result and code requirement can use. A3, steel pipe column casing are made and transport; Adopt TeklaStructures to carry out the Deepen Design of steel pipe column casing, check design omission and mistake, and provide processing drawing and respectively build quantities, factory is according to the size of each member in blanking table, appoint professional processing staff to process and make, after completing, again entirety being assembled. After steel pipe column casing machines, adopt 20t transport vehicle to transport, and carry out finished product protection work. The blanking of a4, beam steel, stirrup, waist muscle, card muscle and arched ribs, according to the model of each reinforcing bar and construction drawing, determines specification and quantity, particularly beam steel and the arched ribs of reinforcing bar, is then numbered and sorts out according to the installation order of reinforcing bar.
Described b step, can be that field joint weldering adopts artificial weldering, and interface weld seam is penetration second-order weld, and gradation weldering is full, to ensure welding quality.
In described c step, can be support while setting up, according to section of beam size, use PKPM software to calculate, determine form bracing system, ensure the stressed all even construction safeties of plank sheathing. Steel pipe column bracket Curved beam is considered, unified layout, all adopt 48.3mm × 3.6mm steel tube fastener formula scaffold, when design arrangement, first consider the horizontal fixed mount of steel pipe column bracket Curved beam plank sheathing, beam-slab bracing system frame is adjusted layout with plank sheathing, and each vertical pole ' s span, step pitch must meet the requirements of design.
In described d step, can be before the welding or installation separately of beam steel, stirrup, waist muscle, card muscle and arched ribs, reinforcing bar welder should be according to the welding procedure order of beam steel and bracket base node, the reinforcing bar having descended is in advance transported to welding position, when welding, reinforcing bar welder, according to the position relationship between reinforcing bar and bracket basic model, carries out accurate settingout at the scene. For ensureing the welding quality on reinforcing bar and bracket basis, can be in the time of welding procedure, carry out same condition test specimen, and carry out system of real name registration, on test specimen, indicate welder's name and weld interval. When beam steel welding, adjacent two longitudinal reinforcements will be staggeredly arranged, and take welding by both sides construction, fusion length >=5d, weld width >=0.6d, throat depth >=0.35d, indivedual positions adopt two-sided welding more at need, can take single-sided welding, and weld length is >=10d.
In described d step; in the time carrying out the welding of each reinforcement component on bracket basis; bracket reinforcement foundation welding masking structure can be set to be protected; bracket reinforcement foundation welding masking structure comprises that a circle covers cloth and covers cloth bracing or strutting arrangement; describedly cover identical on the support device structure adopting in cloth bracing or strutting arrangement and b step and be fixed on the steel pipe column casing of bracket position top, covering cloth and hang to be located at and cover cloth bracing or strutting arrangement surrounding and shield each reinforcing bar weld surrounding position, bracket basis. Like this, can shield welding position, avoid welding process to be subject to windage, also avoid welding operation to have influence on workman's operation around, ensure welding quality and improve Welding Safety.
In d step, synchronously complete the detailed process of the concreting in steel pipe column casing, can be to adopt C60 plain concrete at steel pipe column casing inner concrete, inside mix ZP swelling agent (controlling expansion rate is 2/10000ths to two. five), can pour into a mould blanking with the servicing unit (being equivalent to tumbling barrel) of building with φ 200 glue conduits, in the time of concreting, the maximum height of one-time-concreting be 2m(be every floor divide build for 3 times), after next layer concrete is built and is fully vibrated, build last layer concrete, two-layer concrete building is no more than the concrete presetting period interval time. like this, can get rid of fast the concrete heat of hydration, improve post inner concrete intensity, ensure better the pouring quality of steel pipe column casing inner concrete, and make it build consuming time can being controlled in other synchronous operation deadlines, to raise the efficiency. in addition, in order to raise the efficiency, while building in steel pipe column casing, can be by staggering the time and build in the steel pipe column casing of the adjacent steel tubing string around building core cylinder, with the manpower of saving time better, lifting construction efficiency.
In addition, in d step, can adopt the concreting blanking of building in the auxiliary steel pipe column casing of servicing unit, describedly build servicing unit as Figure 2-3, comprise one can cover to be supported in steel pipe column casing 1(Fig. 2 do not show steel pipe column casing) gripper shoe 10 of upper end, gripper shoe 10 middle parts offer a diameter and are less than the connecting hole of steel pipe column casing 1 diameter Downward match and are connected with a glue conduit 11, gripper shoe 10 tops are upwards provided with a funnel 12, and described connecting hole is positioned at funnel 12 middle parts. Like this, when concreting in steel pipe column casing, gripper shoe can be set aside to steel pipe column casing upper port, lean on tower crane and suspension bucket conveying to be poured in funnel and along glue conduit the concrete being stirred and flow downward to steel pipe column casing bottom, complete casting concrete blanking. Avoiding directly pouring into concrete can be excessive too high due to steel pipe column casing, causes concrete to fall rear bleeding and produces layering, affects pouring quality. Adopt funnel and glue conduit, not only facilitate concrete to pour into, and the guiding effect of glue conduit ensures that concrete can bleeding, ensured to build effect. Further, the rectangle template that gripper shoe 10 adopts broadside size to be greater than steel pipe column casing external diameter obtains, and convenient like this enforcement and with low cost, is beneficial to manufacture. Further, glue conduit 11 adopts the glue conduit of diameter 200mm, can ensure that concrete has larger blanking efficiency, can have again good guiding effect, and in the time being poured into top position, can cutting easily short glue conduit and upwards build to adapt to building progress. Further, glue conduit 11 upper ends are laterally run through and are provided with two and are criss-cross spacer bar 13, and support and articulate the connecting hole top that is fixed to gripper shoe 10 by spacer bar 13. Because this connects without sealing like this, thus adopt spacer bar to connect, simple in structure, and facilitate site operation, be also beneficial to follow-up operation need to cut short glue conduit time simultaneously. Further, described funnel 12 horizontal direction cross sections are rectangular, and the convenient so rear concatenation construction of template cutting that adopts obtains, and is beneficial to execute-in-place preparation.
In f step, adopt in bracket basis, be positioned at the annular steel facing surface of top and be positioned at i shaped steel uper side surface the technology that perforation is all set. When concreting, small-sized vibrating spear can enter into bracket basic internal by perforation, carries out the concrete vibrating of Nodes, strengthen concrete packing, improve Nodes structural strength, the concrete of intra-node can, by new hole-opening deaeration, improve concrete pouring quality simultaneously.
In g step, can be to take curing in the mold mode, make not dehydration of concrete surface, in moisture state. Effectively avoid the easy dehydration in the early stage surface of concrete and the appearance of cracking phenomena. Before form removable, can carry out pressure testing with the test block under condition, treat that concrete strength arrives 100% and can propose form removal application. Before form removal, the each side of reply participation dismounting work carries out written safe practice and tells somebody what one's real intentions are. When dismounting, should remove in strict accordance with the principle of " rear first tear open, tears open after first propping up ".
In present embodiment, described b step completes in the process of on-site hoisting welding of steel pipe column casing, specifically comprises following little step:
B1, be welded be separately uniformly distributed circumferentially four otic placodes that horizontally outward extend at the upper and lower two ends of steel pipe column casing near end, be positioned on the otic placode of upper end and be provided with lifting hole(eyelet);
B2, the symmetrical binding in employing four strand rope rope (φ 21) four directions connect four otic placodes that are positioned at steel pipe column casing upper end, rise and winch to mounted steel pipe column casing top just to position by tower crane;
B3, make to keep welding seam distance between the unsettled and mounted steel pipe column casing in below of steel pipe column casing by tower crane load-bearing, adjust unsettled steel pipe column casing position and make after the mounted steel pipe column casing alignment leveling of itself and below, be weldingly fixed on the steel wire rope of removing connection tower crane after fixing between the upper end otic placode of the mounted steel pipe column casing in below and unsettled steel pipe column casing lower end otic placode by contiguous block;
B4, complete the butt welding of butt welded seam, then cut away the otic placode of the mounted steel pipe column casing of otic placode and the below upper end of the steel pipe column casing lower end of construction, complete welding.
Like this, adopt unsettled setting to reserve weld seam and weld, ensure that between steel pipe column casing, joint can weld the full gap of not staying, ensure joint quality. Wherein, the otic placode of setting up can facilitate steel pipe column casing lifting and follow-up adjustment aim at and welding before the operation such as fixing; Adopt the cubic symmetrical binding of four strand rope rope (φ 21) to connect and can ensure to lift by crane balance, be beneficial to and aim at connection; Adopt tower crane load-bearing can conveniently regulate aligning, simultaneously the unsettled mounted steel pipe column casing of steel pipe column casing and below in top leans against the steel wire rope that is welded to connect the fixed rear dismounting tower crane of piece between otic placode and welds after aiming at, can avoid welding time, rock, ensure welding quality. Finally cut off lower end otic placode and avoid affecting follow-up construction, while retaining upper end otic placode for the follow-up steel pipe column casing installation in top.
In present embodiment, in step b1, there are separately two control bus along the vertical setting of the radian of the quadrant of being upwards separated by week at steel pipe column casing lateral surface near top and bottom place, when step b3 adjusts unsettled steel pipe column casing position, outside the control bus of unsettled steel pipe column casing, side-lower sets up two theodolites, observe taking bus as benchmark by theodolite in the time that two buses of the unsettled outside lower portion of steel pipe column casing all align point-blank with two buses of the below outside upper portion of mounted steel pipe column casing separately, judge unsettled leveling of steel pipe column casing position.
Like this, below steel pipe column casing, in two orthogonal directions, adopt the bus of theodolite observe and decide setting whether all to judge whether upper and lower steel pipe column casing is aimed at point-blank, can simple and fast and accurately auxiliary realization aim at judgement, improve the accuracy that steel pipe column casing is aimed at, ensure that the beam column axial line obtaining after docking is consistent, ensure beam column quality.
In present embodiment, in step b1, be arranged in four otic placodes of steel pipe column casing upper end, otic placode outer end also has the gripper shoe being fixedly installed straight up, the part formation jack horizontal support portion that gripper shoe upper end exceeds position, steel pipe column casing upper surface and exceeds, while adjusting unsettled steel pipe column casing position in step b3 simultaneously, two vertical jack apical graftings that arrange are installed to steel pipe column casing top in two otic placodes of the bottom of unsettled steel pipe column casing corresponding tilt direction both sides and below separately between just right two otic placodes, again by two horizontally disposed jack radially apical grafting installed in below between the jack horizontal support portion of gripper shoe and the lower side surface of unsettled steel pipe column casing of two other otic placode of steel pipe column casing top, rely on and control the flexible of four jack, realize the adjustment of unsettled steel pipe column casing position is realized and aims at leveling.
Like this, rely on two vertical up and down between two pairs of otic placodes of jack apical grafting incline direction that arrange, two jack in addition along back position horizontal radial apical grafting on unsettled steel pipe column lower side surface, can be easily by the adjustment that ejects of jack, the steel pipe column casing of rotation top heeling condition makes it be adjusted to vertical state, have simple to operation and clamping is reliable, regulate the good feature of controllability. Then further, if in the direction that can regulate at needs while needing horizontal position adjustment by relative two jack of level separately apical grafting below installed between the jack horizontal support portion of both sides, steel pipe column casing top and unsettled steel pipe column casing lower side surface and realize and regulating, need height and position to adjust weld seam when size, can lean on again on four direction, arrange separately a vertical jack respectively apical grafting below installed between otic placode corresponding to steel pipe column casing top and unsettled steel pipe column casing bottom and realize and regulating.
Above-mentioned construction handling alignment procedures can be understood referring to Fig. 4, simultaneously, in above-mentioned handling alignment procedures, form handling as shown in Figure 5 outward at steel pipe column casing and aimed at adjustment supplementary structure, four of being uniformly distributed circumferentially of adjusting that supplementary structure comprises steel pipe column casing 1 Shang Xia, weld separately near end at the two ends horizontally outward otic placodes 14 of extension are aimed in described handling, are positioned on the otic placode of upper end and are provided with lifting hole(eyelet). Carry out handling and can be beneficial to keeping handling process steady with regard to convenient employing tower crane like this. Then, be further arranged in four otic placodes 14 of steel pipe column cylinder upper end, otic placode outer end is also fixedly installed gripper shoe 15 straight up, the part formation jack horizontal support portion 16 that gripper shoe 15 upper ends exceed position, steel pipe column casing upper surface and exceed. Like this, rely on jack 17 to carry out tilt adjustments aligning with regard to convenient realization. Further near top and bottom place, two control bus 18 along the vertical extension of the radian of the quadrant of being upwards separated by week are set separately at steel pipe column casing 1 lateral surface again, then side-lower sets up two theodolite (not shown) outside the control bus of unsettled steel pipe column casing. Just can observe better and adjust to guarantee that aligning reliably. In addition, when enforcement, can also be further, at the inner one end of the otic placode 14 upper surface middle part setting that is positioned at upper end boatswain chair 19 straight up, described boatswain chair 19 lower ends and the fixing welding of otic placode 14, boatswain chair inner side and steel pipe column casing are fixing to be welded, described lifting hole(eyelet) is arranged on boatswain chair 19, like this, more improve handling hitch point bonding strength, facilitate its stressed suspention.
In present embodiment, in step b2, when steel pipe column casing rises and winches to the positive contraposition postpone in mounted steel pipe column casing top by tower crane, below mounted steel pipe column casing lateral surface near upper end position, bracing or strutting arrangement is set, described support device structure is referring to shown in Fig. 6-7, comprise the anchor ear sheet 20 of two sections of arcs, anchor ear sheet 20 arcs and anchor ear sheet two ends consistent with steel pipe column casing lateral surface arc stretch out and form anchor ear connecting portion 21, on anchor ear connecting portion, be provided with bolt hole and dock by connecting bolt 22, two sections of anchor ear sheets 20 are along being circumferentially relatively closely attached on after steel pipe column casing lateral surface, between relative anchor ear connecting portion, leave the gap that is less than connecting bolt length, and for anchor ear sheet being held tightly and is fixed to steel pipe column casing lateral surface through bolt hole docking by connecting bolt, every section of anchor ear sheet lateral surface is at least fixedly installed two horizontal support member 23 of horizontally outward extending.
Like this, while making b3 step, operator can carry out steel pipe column cylinder leveling operation under safety rope protection on standing support device. Further, horizontal support member 23 obtains for support angle steel is welded to anchor ear sheet lateral surface. Again further, horizontal support member 23 outer end face have the mounting column 24 being fixedly installed straight up.
In present embodiment, before carrying out butt welding in step b4, a protector is first set on bracing or strutting arrangement, described protective device structure is referring to Fig. 8-10, comprise the bottom surface layer structure 25 that is positioned at below and the top coat structure 26 that is positioned at top, bottom surface layer structure 25 comprises around ring outside ring and bottom surface in the bottom surface of steel pipe column casing circumferential lateral surface setting, in bottom surface, outside ring and bottom surface, between ring, level is fixedly connected with some bottom surfaces connector, top coat structure 26 comprises ring and the outer ring of end face in the end face arranging around steel pipe column casing circumferential lateral surface, in end face, between the outer ring of ring and end face, level is fixedly connected with some end face connectors, in described bottom surface, in ring and end face, between ring, be also vertically fixedly connected with some inner side studs 27 that are uniformly distributed circumferentially, outside described bottom surface, between the outer ring of ring and end face, be also vertically fixedly connected with some outside studs 28 that are uniformly distributed circumferentially, outside stud outer surface is also around being arranged with a circle protective cloth 29.
Like this, protector can improve the individual processing safety of welding, simultaneously protective cloth can windbreak function to ensure welding quality, also can play in addition shaded effect, prevent from welding high light and leak, effectively avoided light pollution to avoid the impact of welding on other construction workman of below.
In present embodiment, the bottom surface layer structure 25 of above-mentioned protector, top coat structure 26, inner side stud 27 and outside stud 28 are ferrous materials and make, and are weldingly connected and ensure self intensity to facilitate. In bottom surface layer structure 25, can also lay one deck asbestos cloth 31 further, to prevent that welding spark from falling to the workman's operation of impact below, below. Further, outside bottom surface, in ring, the mounting column of the horizontal support member outer end of corresponding bracing or strutting arrangement is provided with the installing hole of coupling, facilitates the installation of protector on bracing or strutting arrangement to be located by connecting. Further, offer screw and be connected with carrying bolt 29 on inner side stud 27, the two ends that carrying bolt 29 is positioned at screw are respectively provided with a locking nut 30. Like this, can be after protector be installed on bracing or strutting arrangement, tighten carrying bolt and make its inner push against steel pipe column tube outer surface, then by two relative rotational locks of locking nut; Can ensure that protector is upwards tightened to steel pipe column tube outer surface along week, reduce shake, improve high-altitude application security and ensure welding quality. Protective cloth is colour bar cloth further, improves work high above the ground alarming effect. On the stud of outside, also edge is circumferentially enclosed mutually and is connected with safety rope 32 further, to improve better high-altitude working safety.
In present embodiment, in e step, be used to form the structure of arc mould on the curved side surface of bracket body between crossbeam referring to Figure 11, comprise the arc formwork 33 that overall radian is consistent with bracket bodies side surface radian, arc formwork 33 outsides are fixedly connected with the flitch part 34 of some vertical settings, flitch part 34 outsides are fixedly connected with the horizontally disposed curved steel tube 35 consistent with arc formwork radian, and wherein arc formwork 33 is fixed on flitch part 34 after by the bending of monoblock rectangle template and obtains.
Like this, this arc mode structure is simple, and can be transformed and be obtained by the planar rectangular template forming, and takes full advantage of waste and old template and steel pipe, has improved stock utilization in reaching quality requirement.
In present embodiment, between arc formwork 33 and flitch part 34, adopt and nail, conveniently realize the intensity bending forming of arc formwork. Curved steel tube 35 comprises vertical at least two arranged side by side, and between curved steel tube 35, is vertically fixedly connected with vertical reinforcement steel pipe 36, supports bulk strength to ensure the bending force to rectangle template to improve. As preferred curved steel tube 35 with vertically strengthen adopting fastener 37 to connect between steel pipe 36, to facilitate attended operation. Between curved steel tube 35 and flitch part 34, adopt steel wire 38 binding to connect, ensureing bonding strength when, avoid the excessive laminating affecting between flitch part medial surface and arc formwork 33 of connector. Be connected to curved steel tube 35 outer surfaces as preferably vertically strengthening steel pipe 36, make it avoid interfering being fitted and connected between flitch and arc formwork.
Specifically, the arc mould of said structure, can be obtained by below method step:
(1) utilize BIM technology to set up the model of bracket basis segmental arc template, draw the technical parameter of template processing, guiding workman processes and makes template.
(2) adopting on-the-spot specification is the common scaffolding steel pipe of Ф 48.3 × 3.6mm, according to the radian of bracket segmental arc, utilizes professional bending machine equipment to process the curved steel tube of satisfying the demand.
(3), according to bracket height H, process the vertical reinforcement steel pipe that length is identical with bracket height several several with flitch.
(4) vertically strengthen steel pipe and vertically arrange one along curved steel tube lateral arcs length direction every 300mm, utilize fastener that curved steel tube and the vertical steel pipe of strengthening are carried out fastening; Flitch is arranged one along side direction in curved steel tube every 150mm is vertical, utilizes the steel wire with some strength and toughness that flitch and curved steel tube are carried out fastening, guarantee fastening strength (not being offset) simultaneously.
(5) according to the size (arc length of segmental arc is the length of common templates, and the high H of bracket is the wide of common templates) of bracket segmental arc expansion rectangle, process the rectangle template needing stand-by.
(6) curved steel tube is aimed in one end of rectangle template, be placed in above flitch, utilize nail that rectangle template and flitch are fixed, be fixed to the other end from one end of curved steel tube successively, push by force rectangle template and be deformed into required radian by nail is fixing, in fixation procedure, will ensure the perpendicularity of rectangle template. Rectangle template is fixed along the radian direction of curved steel tube, has finally formed the cylinder bracket arc construction mould with some strength.
In present embodiment, before nail is fixing, first template is heated and is also coated with and spreads releasing agent to 80-150 DEG C, like this, template is generally timber, heats to be beneficial to its bending after softening and to be required arc and to avoid breaking, smearing release agent after simultaneously heating, be beneficial to releasing agent and infiltrate into template surface, improve surface flatness and be beneficial to the follow-up demoulding, the gap that simultaneously releasing agent also can filling template bending causes and avoid breaking. Releasing agent can be bought existing releasing agent product or adopt fluid to obtain.
Therefore said method can improve construction quality, ensure building intensity, alleviate workman's labour intensity, improve workman's efficiency, compared with tradition construction, there is more convenient operation, the feature such as construction quality is more reliable, cost is cheaper, there is larger application value, be particularly suitable for especially in high-rise building, applying at skyscraper.
Claims (5)
1. the steel pipe column casing of steel pipe column docking protection welding method; this method by tower crane by steel pipe column casing to be welded handling to below welded still pipe column casing upper end and adjust aim at after welding; it is characterized in that; before welding first below mounted steel pipe column casing lateral surface near upper end position, bracing or strutting arrangement is set; support protector is set by bracing or strutting arrangement again; in protector, have a circle protective cloth welding position is enclosed in protective cloth, workman relies on the support of bracing or strutting arrangement to carry out welding operation again.
2. the steel pipe column casing of steel pipe column as claimed in claim 1 docking protection welding method, it is characterized in that, described bracing or strutting arrangement, comprise the anchor ear sheet of two sections of arcs, anchor ear sheet arc and anchor ear sheet two ends consistent with steel pipe column casing lateral surface arc stretch out and form anchor ear connecting portion, on anchor ear connecting portion, be provided with bolt hole and dock by connecting bolt, two sections of anchor ear sheets are along being circumferentially relatively closely attached on after steel pipe column casing lateral surface, between relative anchor ear connecting portion, leave the gap that is less than connecting bolt length, and for anchor ear sheet being held tightly and is fixed to steel pipe column casing lateral surface through bolt hole docking by connecting bolt, every section of anchor ear sheet lateral surface is at least fixedly installed two horizontal support member of horizontally outward extending.
3. the steel pipe column casing of steel pipe column as claimed in claim 2 docking protection welding method, it is characterized in that, described protective device structure comprises the top coat structure that is positioned at the bottom surface layer structure of below and is positioned at top, bottom surface layer structure comprises around ring outside ring and bottom surface in the bottom surface of steel pipe column casing circumferential lateral surface setting, in bottom surface, outside ring and bottom surface, between ring, level is fixedly connected with some bottom surfaces connector, top coat structure comprises ring and the outer ring of end face in the end face arranging around steel pipe column casing circumferential lateral surface, in end face, between the outer ring of ring and end face, level is fixedly connected with some end face connectors, in described bottom surface, in ring and end face, between ring, be also vertically fixedly connected with some inner side studs that are uniformly distributed circumferentially, outside described bottom surface, between the outer ring of ring and end face, be also vertically fixedly connected with some outside studs that are uniformly distributed circumferentially, outside stud outer surface is also around being arranged with a circle protective cloth.
4. the steel pipe column casing of steel pipe column as claimed in claim 1 docking protection welding method, is characterized in that, the step that described adjustment is aimed at, specifically comprises, by tower crane, steel pipe column casing to be installed is sling to mounted steel pipe column casing top just to position; There are separately two control bus along the vertical setting of the radian of the quadrant of being upwards separated by week at steel pipe column casing lateral surface near top and bottom place, in the time adjusting unsettled steel pipe column casing position, outside the control bus of unsettled steel pipe column casing, side-lower sets up two theodolites, observe taking bus as benchmark by theodolite in the time that two buses of the unsettled outside lower portion of steel pipe column casing all align point-blank with two buses of the below outside upper portion of mounted steel pipe column casing separately, judge unsettled leveling of steel pipe column casing position aligning.
5. the steel pipe column casing of steel pipe column as claimed in claim 4 docking protection welding method, it is characterized in that, be welded with separately near end four otic placodes that horizontally outward extend that are uniformly distributed circumferentially at the upper and lower two ends of steel pipe column casing, be arranged in four otic placodes of steel pipe column casing upper end, otic placode outer end also has the gripper shoe being fixedly installed straight up, the part formation jack horizontal support portion that gripper shoe upper end exceeds position, steel pipe column casing upper surface and exceeds, simultaneously in the time adjusting unsettled steel pipe column casing position, two vertical jack apical graftings that arrange are installed to steel pipe column casing top in two otic placodes of the bottom of unsettled steel pipe column casing corresponding tilt direction both sides and below separately between just right two otic placodes, again by two horizontally disposed jack radially apical grafting installed in below between the jack horizontal support portion of gripper shoe and the lower side surface of unsettled steel pipe column casing of two other otic placode of steel pipe column casing top, rely on and control the flexible of four jack, realize the adjustment of unsettled steel pipe column casing position is realized and aims at leveling.
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