CN110847213A - Light steel cage type tower crane pedestal and assembly construction method - Google Patents
Light steel cage type tower crane pedestal and assembly construction method Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 29
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- 238000000034 method Methods 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims description 67
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 20
- 230000002787 reinforcement Effects 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 238000005266 casting Methods 0.000 claims description 6
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- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 239000011150 reinforced concrete Substances 0.000 claims description 4
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- 238000007689 inspection Methods 0.000 claims description 3
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- 235000017491 Bambusa tulda Nutrition 0.000 description 18
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
The invention relates to a light steel cage type tower crane pedestal and an assembly construction method, which are characterized in that: the concrete pile frame hoop is arranged on the top of the pile, the steel short beam is arranged on the top of the pile, the steel square tube connecting device is arranged on the bottom of the pile, and the steel square tube connecting device is arranged on the top of the pile; four concrete piles are square in layout, a pile top frame hoop is arranged on the upper portion of each concrete pile, a concrete superposed cover plate is arranged on the top of the pile top frame hoop, the lower end of each lattice column extends into the corresponding concrete pile, a vertical combined support and a steel short beam are fixedly connected between two adjacent lattice columns in the horizontal direction, a plurality of horizontal combined supports are fixedly connected upwards in the inner diameter of a space formed by the lattice columns, a steel square cylinder connecting device is arranged at the upper end of each lattice column, and a through long reinforcing rib is fixedly connected in the axial direction of each lattice column. The advantages are that: the construction speed can be greatly improved, the operation process is simple, the disassembly is convenient and rapid, and steel can be recycled, so that the environmental pollution and the solid garbage are avoided.
Description
Technical Field
The invention belongs to the technical field of tower crane equipment foundations in constructional engineering, and particularly relates to a light steel cage type tower crane base frame and an assembly construction method.
Background
The tower crane is the most common large-scale handling equipment in the construction, and its basic form is mostly "pile foundation + concrete big platform + pre-buried tower crane landing leg", promptly: the tower crane load is transmitted to the concrete large platform through the tower crane supporting legs, and is transmitted to the pile foundation and finally transmitted to the underground soil body, the pile foundation is simultaneously constructed along with other pile foundations, and the driving depth is determined according to the soil quality condition and the tower crane model. Pile heads are removed after pile foundations are finished and are connected with concrete large platform steel bars, concrete is poured into a whole after formwork erection is finished, and a tower crane can be installed after 28 days of maintenance. The concrete large platform mostly adopts the strength grade of C35, and the type, the diameter and the number of the steel bars are determined by force calculation. When the tower crane foundation is located in the range of the underground structure of the building, the part of the tower crane foundation penetrating through the underground structure and the ground needs to be dismantled after the construction task is completed, and the tower crane foundation is divided into the following parts according to the models: the size of a large concrete platform body is as follows, wherein the tower crane of TCT7020-12E (short for 70 towers) takes the underground layer as an example: 7000mm 1400mm, volume 68.6m3The weight is about 164.64 tons, and the requirement on the bearing capacity of the pile body is high; the pile foundation takes 500mm as an example, penetrates 3m underground for 4 piles, and has a volume of 2.355m3*4＝9.42m3And weighs about 5.65 x 4-22.6 tons. The tower crane foundation form has long construction period and volumeThe construction method is huge, occupies construction space of a building structure, requires large mechanical equipment for cutting or static blasting for dismantling, and has high construction cost; meanwhile, a large amount of construction waste is generated, the outward transportation workload is large, the environment is polluted, secondary utilization cannot be realized, and the economic investment is extremely large.
Disclosure of Invention
The invention provides a light steel cage type tower crane pedestal and an assembly construction method, which can greatly improve the construction speed, have simple operation process, convenient and quick disassembly, recycle steel, avoid environmental pollution and generate solid garbage, and solve the technical problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:
light-duty steel cage tower crane bed frame, its characterized in that: the concrete pile frame hoop is arranged on the top of the pile; four concrete piles are square layout, concrete pile upper portion is equipped with pile bolck frame hoop, is equipped with the concrete coincide apron at pile bolck frame hoop top, every lattice column lower extreme runs through concrete coincide apron and pile bolck frame hoop and stretches into in the concrete pile that corresponds, vertical combination of rigid coupling supports and steel stub beam between two adjacent lattice columns in the horizontal direction, upwards a plurality of horizontal combination of rigid coupling support in the space internal diameter that constitutes by the lattice column, steel square tube connecting device is installed respectively to every lattice column upper end, gu adorn logical long strengthening rib in the axial of every lattice column, logical long strengthening rib lower extreme penetrate the concrete pile and with the steel reinforcement cage rigid coupling of concrete pile.
The invention can also adopt the following technical scheme:
preferably, the horizontal combination support includes first octagon gusset plate, four first round steel section of thick bamboo and four fishplates, first octagon gusset plate is located horizontal combination support center, the one end and the first round steel section of thick bamboo one end rigid coupling of every fishplate, the other end and lattice column rigid coupling, the other end and the first octagon gusset plate rigid coupling of first round steel section of thick bamboo, adjacent first round steel section of thick bamboo contained angle are 90 wholly to be the cross.
Preferably, the vertical combined support comprises a second octagonal node plate, four second round steel cylinders and four shuttle-shaped plates, the second octagonal node plate is located at the center of the vertical combined support, one end of each shuttle-shaped plate is fixedly connected with one end of each second round steel cylinder, the other end of each shuttle-shaped plate is fixedly connected with the lattice column and the steel short beam, the other end of each second round steel cylinder is fixedly connected with the corresponding second octagonal node plate, and the included angle of the adjacent second round steel cylinders is 90 degrees and is integrally crossed.
Preferably, steel square tube connecting device includes steel square tube, crown plate, first stiffening plate, second stiffening plate, layer board, structure floor and tower crane landing leg, the steel square tube comprises 4 the welding of specification square steel plates such as block, has the crown plate in the welding of steel square tube periphery, the crown plate is located apart from steel square tube connecting device top edge 100mm department, and the effect of reinforcing steel square tube can be played to the adoption crown plate here. The supporting plate is located at the bottom of the steel square cylinder and is welded with the steel square cylinder and the plane center of the lattice column in a superposition mode, and the supporting plate is mainly used for connecting the steel square cylinder and the lattice column and can seal the lattice column. Put at layer board central point and open there is the concrete filling hole, the four corners department system that the layer board corresponds the lattice column has the exhaust hole, and it has two to wear the muscle hole to open between the adjacent exhaust hole, is located layer board up end and steel square tube periphery vertical welding have 16 first stiffening plate, is located layer board lower extreme terminal surface and steel square tube periphery vertical welding have 16 second stiffening plates, first stiffening plate aligns from top to bottom with the second stiffening plate, steel square tube inner wall is as an organic whole through structure floor and tower crane landing leg welded connection.
Preferably, the lattice column is formed by welding angle steel and batten plates, the lower end of the lattice column is embedded into the concrete pile, and the embedding depth is not less than 1/3 column height.
Preferably, the through long reinforcing ribs are made of HRB400 reinforcing steel bars with the diameter of 25mm, and the lower ends of the through long reinforcing ribs are arranged from the bottom ends of the lattice columns and are effectively connected with a reinforcing cage of the concrete pile; the upper ends of the through long reinforcing ribs penetrate through the supporting plate and the circular holes of the bottom plate of the tower crane supporting leg to be welded with the structural rib plate of the steel square cylinder connecting device and the tower crane supporting leg; the middle part is fixedly connected with the lattice column.
Preferably, the pile top frame hoop is of a reinforced concrete cast-in-place cross beam structure, and the horizontal projection is 9-grid-shaped.
The assembling construction method of the light steel cage type tower crane base frame is characterized by comprising the following steps of: the method comprises the following steps:
s1 pile position paying-off
Paying off the pile position and checking and accepting according to the tower crane position determined by a design drawing and a construction site plane layout strictly;
s2, forming holes
After the position of the pile driver is adjusted, hole forming is started, and a circulating mud retaining wall is adopted, so that hole cleaning and acceptance inspection are carried out after the designed depth is reached;
s3, manufacturing latticed column
Manufacturing lattice columns according to design requirements, wherein the lattice columns are blanked strictly according to the design length and are assembled in a special explorator to ensure the verticality of the lattice columns;
s4, installing and welding reinforcement cage and lattice column
(1) Placing a reinforcement cage before placing the lattice column, and placing the reinforcement cage down strictly according to a conventional reinforcement cage hoisting method;
(2) after the reinforcement cage is placed, correcting the lattice column, wherein the lattice column is aligned to the center of the pile hole;
(3) lowering the lattice column, inserting the lattice column into the cast-in-situ bored pile with the height below the designed top elevation of 1/3 lattice columns, respectively attaching reinforcing steel bars to the top of the cast-in-situ bored pile and the bottom of the lattice column, and fully welding the reinforcing steel bars with the two sides of the lattice column and the reinforcing cage;
s5 casting pile concrete
Pouring concrete of the concrete pile to a designed elevation and timely grouting according to design requirements;
s6, gradually excavating foundation trench and removing lattice column outer concrete
After the conditions of the construction site are allowed, excavating foundation trenches in a layered mode, removing the concrete wrapped outside the lattice column, cleaning the concrete, and meeting the requirement of the welding surface;
s7, mounting steel square tube connecting device
Processing and assembling the components of the steel square cylinder connecting device according to the drawing,
(1) penetrating the full-length reinforcing steel bars through the bar penetrating holes of the supporting plate, adjusting the supporting plate to enable the center of the supporting plate to be aligned with the center of the lattice column to be temporarily fixed, and welding the supporting plate with the batten plates and the angle steel at the top end of the lattice column;
(2) paying off the upper surface of the supporting plate, determining the outer contour control line of the steel square cylinder, the central points of the position control lines of the first stiffening plate and the second stiffening plate and the like, requiring the center of the steel square cylinder to coincide with the centers of the lattice column and the supporting plate, sequentially welding the square steel plates according to contour lines to form the steel square cylinder, and sequentially welding the ring plates to the steel square cylinder according to set positions and closing the ring plates;
(3) sequentially welding the first stiffening plates according to control lines of the first stiffening plates and the second stiffening plates, and then welding the second stiffening plates in alignment;
(4) after the 4 steel square cylinders and the first stiffening plates and the second stiffening plates on the periphery are welded, penetrating full-length reinforcing steel bars through bottom plate round holes of tower crane supporting legs, adjusting the positions and the elevations of the tower crane supporting legs through standard joint supports of the tower crane, and then primarily fixing the tower crane supporting legs and the steel square cylinders into a whole through structural rib plates in a welding mode;
(5) welding the full-length reinforcing steel bars with the tower crane support leg bottom plate, the structural rib plate and the lattice column firmly;
s8 casting concrete
Pouring concrete into the steel square tube connecting device, wherein the grade of the concrete is preferably C35 or above, and the concrete is cured in time after being vibrated to be compact;
s9, installing horizontal combined support, vertical combined support and steel short beam
Vertical combined supports and steel short beams are fixedly connected between two horizontally adjacent lattice columns, a plurality of horizontal combined supports are fixedly connected in the inner diameter direction of a space formed by the four lattice columns,
the horizontal combined support, the vertical combined support and the installation of the steel short beam are completed within 10 hours after the excavation,
(1) the fishplate of the horizontal combined support is firstly inserted into the notch of the first round steel cylinder for welding, and then the fusiform plate of the vertical combined support is inserted into the notch of the second round steel cylinder for welding,
(2) paying off the latticed column for controlling the welding positions and elevations of the horizontal combined support, the vertical combined support and the steel short beam,
(3) when the horizontal combined support is welded on the lattice column, the lattice column is welded with two adjacent first round steel cylinders, then the first octagonal node plate is inserted into the end part notch of the first round steel cylinder, then the other two first round steel cylinder end part notches are respectively inserted onto the first octagonal node plate, after the position and the elevation of the fishplate are adjusted, the fishplate and the lattice column are respectively welded and connected, finally, the position of the first octagonal node plate is adjusted and is welded and connected with four first round steel cylinders, the included angle of the adjacent first round steel cylinders is 90 degrees, the whole body is in a cross shape, the horizontal combined support is formed, and other horizontal combined supports are sequentially installed from top to bottom;
(4) after the first horizontal combined support is welded, 4 steel short beams are welded, and the central line elevation of each steel short beam is superposed with the central line of the horizontal combined support;
(5) welding vertical combined supports, namely welding one ends of two adjacent second round steel cylinders, which are welded with shuttle-shaped plates, with a lattice column and a steel short beam respectively, inserting second octagonal node plates into end notches of the second round steel cylinders and installing the other two second round steel cylinders, welding the shuttle-shaped plates with the lattice columns and the steel short beams after adjusting the positions, finally adjusting the positions of the second octagonal node plates and welding the second octagonal node plates with 4 second round steel cylinders, wherein the included angles of the adjacent second round steel cylinders are 90 degrees and are integrally cross-shaped, so that the vertical combined supports are formed, and the other vertical combined supports are sequentially installed from top to bottom;
s10, pouring pile top frame hoop and concrete laminated cover plate
Stopping excavation when earthwork in the range of the concrete laminated cover plate is excavated to a position 5CM away from the upper skin elevation of the concrete laminated cover plate, replacing with a manually-excavated concrete laminated cover plate and a groove body at the pile top frame hoop position, uniformly supporting a mold and binding steel bars after the lowest part is excavated to the lower skin elevation of the pile top frame hoop, pouring concrete after acceptance and timely maintaining, and pouring and forming the pile top frame hoop and the concrete laminated cover plate at one time;
s11, mounting of tower crane
And (4) sequentially installing tower crane standard sections after concrete in the steel square tube connecting device reaches the design strength.
The invention has the advantages and positive effects that: by adopting the technical scheme, the light steel cage type tower crane base frame has the advantages that the size is greatly reduced, the construction of other structures in a building site is not influenced, the self weight of the frame body is greatly reduced, the requirement of the compression capacity of a concrete pile body is lowered, the weight is light, the rigidity is high, and the torsion resistance and the bending resistance are very high; the steel part of the frame body can realize factory prefabrication and field assembly, the installation speed is high, and the construction efficiency is high. Because of adopting the light steel structure, the utility model can be manually cut and dismantled without large-scale cutting equipment or blasting demolition, can be transported in sections and blocks, and can be recycled; the concrete consumption and the construction waste are greatly reduced, and the workload of demolition and transportation in the later construction stage is reduced. The overall structure form is succinct, and support body height and cross sectional dimension can be according to loading parameter nimble adjustments such as tower crane model, geological conditions, reduce the cost of manufacture on tower crane basis by a wide margin. When this light-duty steel cage tower crane bed frame runs through underground structure, can be under construction with structure body is integrative, need not to keep somewhere the hole, avoids the seepage. The pile top frame hoop limits the displacement of the pile body, strengthens the rigidity of the tower crane foundation, can be used for soft soil foundations and the like, and has wider application range; concrete coincide apron increases light-duty steel cage tower crane bed frame lower part counter weight, and the focus descends, and stability is higher.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic structural view of the steel square tube connecting device of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic view of the horizontal combination support of the present invention;
FIG. 6 is a schematic structural view of the vertical combination support of the present invention;
FIG. 7 is a schematic view of a first octagonal node plate structure of the horizontal combination support of the present invention;
FIG. 8 is a schematic view of the horizontal combination support of the present invention showing the structure of the fishplate;
fig. 9 is a schematic diagram of the structure of the vertical combination support shuttle plate of the present invention.
FIG. 10 is a schematic view of a first round steel cylinder structure of the horizontal combination support of the present invention;
fig. 11 is a side view of fig. 10.
In the figure: 1. concrete piles; 2. pile top frame hoops; 3. a concrete overlapping cover plate; 4. a short beam made of steel; 5. A full-length reinforcing rib; 6. horizontally combining and supporting; 6-1, a first octagonal gusset plate; 6-2 parts of a first round steel cylinder, 6-3 parts of a fishplate; 7. a steel square cylinder connecting device; 7-1, steel square cylinders; 7-2, ring plates; 7-3, a first stiffening plate; 7-4, second stiffening plates; 7-5, a supporting plate; 7-6, constructing a rib plate; 7-7, an exhaust hole; 7-8, a rib penetrating hole; 7-9 parts of tower crane supporting legs; 7-9-1, tower crane support leg bottom plates; 8. a lattice column; 8-1, angle steel; 8-2, batten plate; 9. vertical combined support; 9-1, a second octagonal gusset plate; 9-2, a second round steel cylinder; 9-3, a shuttle plate; 10. and (4) a reinforcement cage.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to figures 1-11 of the drawings,
light-duty steel cage tower crane bed frame includes four concrete piles 1, pile bolck hoop 2, concrete coincide apron 3, steel short beam 4, leads to long strengthening rib 5, a plurality of horizontal combination support 6, a plurality of vertical combination support 9, steel square tube connecting device 7, four lattice column 8 corresponding with the concrete pile. The four concrete piles are in square layout, concrete cast-in-place piles are suitable for the concrete piles, and the pile diameter, the pile depth and the reinforcing bars are determined according to parameters such as tower crane models and geological conditions.
Concrete pile upper portion is equipped with a pile head frame hoop 2, the frame hoop is reinforced concrete cast-in-place well word beam structure, and horizontal projection is 9 palace check shapes, concrete pile 1's pile head is located four angle check of pile head frame hoop respectively, and this concrete pile is used for restricting concrete pile head displacement, promotes light-duty steel cage tower crane bed frame bulk stiffness.
The top of the pile top frame hoop is provided with a concrete superposed cover plate 3, the concrete superposed cover plate is positioned above the pile top frame hoop 2, the horizontal projection of the concrete superposed cover plate is square and exceeds the outer edge of the pile top frame hoop by more than 1m, the concrete superposed cover plate is of a reinforced concrete cast-in-place structure, and the concrete superposed cover plate is cast to a height from the bottom to the bottom of the cushion layer.
The lower end of each lattice column 8 penetrates through the concrete superposed cover plate 3 and the pile top frame hoop 2 and extends into the corresponding concrete pile 1, each lattice column is formed by welding angle steel and batten plates, the concrete pile is buried at the lower end of each lattice column, and the buried depth is not less than 1/3 column height.
Specifically, the horizontal combined support 6 comprises a first octagonal node plate 6-1, four first round steel cylinders 6-2 and four fishplates 6-3, two strip-shaped notches are respectively formed in the two ends of each first round steel cylinder in the middle along the axial center direction of each round steel cylinder, the width of each strip-shaped notch is consistent with the thickness of each fishplate, and the length of each strip-shaped notch is determined according to the installation process. First octagon gusset plate is located horizontal combination support central point and puts, and the notch of first round steel section of thick bamboo inserts behind the first octagon gusset plate respectively the symmetric welding in 4 jiaos, the one end and the first round steel section of thick bamboo one end rigid coupling of every fishplate, fishplate one end inserts first round steel section of thick bamboo other end notch promptly, the fishplate other end and lattice column rigid coupling, and adjacent first round steel section of thick bamboo contained angle is 90 wholly to be the cross.
Specifically, the vertical combined support 9 comprises a second octagonal node plate 9-1, four second round steel cylinders 9-2 and four shuttle-shaped plates 9-3, the second octagonal node plate is located at the center of the vertical combined support, two strip-shaped notches are respectively formed in the two ends of each second round steel cylinder in the center along the axial direction of the round steel cylinder, the width of each second round steel cylinder is consistent with the thickness of each shuttle-shaped plate, and the length of each second round steel cylinder is determined according to the installation process. The notch of the second round steel cylinder is inserted into the second octagonal gusset plate and then is symmetrically welded at 4 corners, one end of each shuttle-shaped plate is fixedly connected with one end of the second round steel cylinder, namely, one end of each shuttle-shaped plate is inserted into the notch at the other end of the second round steel cylinder, the other end of each shuttle-shaped plate is fixedly connected with the lattice column and the steel short beam after the position is adjusted, and the included angle of the adjacent second round steel cylinders is 90 degrees and is integrally crossed.
Specifically, the first octagonal node plate 6-1 of the horizontal combined support and the second octagonal node plate 9-1 of the vertical combined support have the same structure, as shown in fig. 7. The first round steel cylinder 6-2 supported by the horizontal combination has the same structure as the second round steel cylinder 9-2 supported by the vertical combination, as shown in fig. 10 and 11.
Specifically, the steel square cylinder connecting device 7 comprises a steel square cylinder 7-1, a ring plate 7-, a first stiffening plate 7-3, a second stiffening plate 7-4, a supporting plate 7-5 and a structural rib plate 7-6. The steel square tube is formed by welding 4 equal-specification square steel plates, ring plates are welded on the periphery of the steel square tube, and the ring plates are adopted to play a role in reinforcing the steel square tube. The ring plate is in a horizontal projection shape and is annular, the ring plate is located at a position 100mm away from the upper edge of the steel square cylinder connecting device, and the size of an inner ring of the ring plate is consistent with that of the outer edge of the steel square cylinder. The supporting plate is located at the bottom of the steel square cylinder and is welded with the steel square cylinder and the plane center of the lattice column in a superposition mode, and the supporting plate is mainly used for connecting the steel square cylinder and the lattice column and can seal the lattice column. The center of the supporting plate is provided with a concrete filling hole, four corners of the supporting plate corresponding to the lattice columns are provided with vent holes 7-7 with the diameter of 25mm, two rib penetrating holes 7-8 are arranged between adjacent vent holes, namely, the middle part of each edge of the supporting plate is provided with 1 group of circular rib penetrating holes with the diameter of 35mm for penetrating through the long reinforcing ribs. The steel square tube comprises a support plate, a steel square tube and a steel square tube, wherein 16 first stiffening plates are perpendicularly welded on the upper end face of the support plate and the outer periphery of the steel square tube, 16 second stiffening plates are perpendicularly welded on the lower end face of the support plate and the outer periphery of the steel square tube, the first stiffening plates and the second stiffening plates are vertically aligned and are not dislocated, and the first stiffening plates and the second stiffening plates are trapezoidal. The inner wall of the steel square barrel is connected with the tower crane supporting legs 7-9 into a whole in a welding mode through the structural rib plates. The tower crane supporting leg is a self-contained accessory of a tower crane, and a bottom plate 7-9-1 of the tower crane supporting leg is provided with a round hole for penetrating through a long reinforcing rib. After the tower crane supporting leg positioning frame is used for accurate positioning, the tower crane supporting legs and the inner wall of the steel square barrel are connected into a whole in a welding mode through the structural rib plates.
Specifically, the through long reinforcing ribs 5 are made of HRB400 reinforcing steel bars with the diameter of 25mm, and the lower ends of the through long reinforcing ribs are arranged from the bottom ends of the lattice columns and are effectively connected with a reinforcing cage of the concrete pile; the upper ends of the through long reinforcing ribs penetrate through the supporting plate and round holes of the bottom plate 7-9-1 of the tower crane supporting leg and are welded with structural rib plates of the tower crane supporting leg and the steel square cylinder connecting device, and the middle parts of the through long reinforcing ribs are fixedly connected with the latticed columns. The full-length reinforcing rib can be lengthened, and the requirement of lengthening the reinforcing steel bar is met.
An assembly construction method of a light steel cage type tower crane pedestal comprises the following steps:
s1 pile position paying-off
And (4) paying off the pile position and checking and accepting according to the tower crane position determined by a design drawing and a construction site plane layout drawing strictly.
S2, forming holes
And (4) adjusting the position of the pile driver, then starting to form a hole, and adopting circulating slurry to protect the wall, and cleaning the hole to check and accept after reaching the design depth.
S3, manufacturing a latticed column 8
The latticed column is manufactured according to design requirements, is blanked according to the design length strictly, and is assembled in a special explorator so as to ensure the verticality of the latticed column. Correcting angle steel before assembly, wherein the allowable deviation in the blanking length is +/-5 mm, the allowable deviation of local deformation is +/-2 mm, and the grade of a groove and a butt weld is first grade; the height of a welding seam for splicing the angle steels is 8mm, the grade of the welding seam is two levels, joints are staggered during butt welding of the lattice columns, the angle steel joints with the same section are not more than 50%, the staggered positions of adjacent angle steels are not less than 1m, and the angle steel joints are reinforced by short angle steels made of the same material on two sides of the angle steel at the position of the welding seam; the bending allowable deviation h/300 of the latticed column body is not more than 5 mm; after the lattice columns are processed, the lattice columns are stacked neatly and cannot exceed two layers, and the guide wood needs to be on the same straight line.
S4, installing and welding reinforcement cage 10 and lattice column
(1) The steel reinforcement cage is placed before the lattice column is placed, and the steel reinforcement cage is placed strictly according to a conventional steel reinforcement cage hoisting method.
(2) After the steel reinforcement cage is placed, lattice column correction is carried out, and the lattice column is aligned to the center of the pile hole.
(3) And (3) lowering the lattice column, inserting the lattice column into the drilled cast-in-place pile to 1/3 lattice column heights below the designed top elevation, and respectively attaching reinforcing steel bars to the top of the drilled cast-in-place pile and the bottom of the lattice column and fully welding the lattice column and the two sides of the reinforcing cage. Fixing the lattice column at the center of a pile hole of the cast-in-place pile by using the positioning steel bar, observing and controlling the lattice column by using a total station instrument in the lowering process of the lattice column, so that the center of the lattice column is always coincided with the center of the pile hole of the cast-in-place pile, and the center deviation is not more than 20 mm. And measuring the elevation of the top of the correction frame at the position of the cast-in-place pile hole by using a level gauge in advance, calculating the depth of the insertion hole according to the elevation of the top of the correction frame, and marking the elevation position of the top of the pile on the steel upright column by using red paint.
S5 casting concrete pile
And pouring concrete of the concrete pile to a designed elevation and timely grouting according to design requirements.
S6, gradually excavating foundation trench and removing lattice column outer concrete
And after the conditions of the construction site are allowed, excavating foundation trenches in a layered mode, removing the concrete wrapped outside the lattice column, cleaning up the concrete, and meeting the requirement of the welding surface.
S7, mounting steel square tube connecting device 7
Processing and assembling the components of the steel square cylinder connecting device according to the drawing,
(1) and (3) enabling the full-length reinforcing steel bars 5 to penetrate through the reinforcement penetrating holes 7-8 of the supporting plates 7-5, adjusting the supporting plates to enable the centers of the supporting plates to be aligned with the centers of the lattice columns for temporary fixation, and welding the supporting plates with the batten plates 8-2 at the top ends of the lattice columns and the angle steel 8-1.
(2) Paying off the upper surface of the supporting plate, determining the outer contour control line of the steel square cylinder 7-1, the central points of the position control lines of the first stiffening plate 7-3 and the second stiffening plate 7-4, and the like, requiring the center of the steel square cylinder to coincide with the center of the lattice column and the center of the supporting plate, welding the square steel plates in sequence according to contour lines to form the steel square cylinder, welding the ring plates in sequence according to set positions to the steel square cylinder, and closing the steel square cylinder.
(3) And sequentially welding the first stiffening plates according to the control lines of the first stiffening plates and the second stiffening plates, and then welding the second stiffening plates in alignment.
(4) After the 4 steel square cylinders and the first stiffening plates and the second stiffening plates on the periphery are welded, the full-length reinforcing steel bars penetrate through the circular holes of the bottom plates of the tower crane supporting legs, the positions and the elevations of the tower crane supporting legs are adjusted through the standard joint supports of the tower crane and then are preliminarily fixed, and the tower crane supporting legs 7-9 and the steel square cylinders are welded and connected into a whole through the structural rib plates.
(5) And welding the full-length reinforcing steel bars 5 with the tower crane support leg bottom plate, the structural ribbed plates 7-6 and the lattice columns firmly.
S8 casting concrete
Concrete is poured into the steel square tube connecting device, the grade of the concrete is preferably C35 or above, and the concrete is maintained in time after being vibrated to be compact.
S9, installing a horizontal combined support 6, a vertical combined support 9 and a steel short beam 4
Vertical combined supports and steel short beams are fixedly connected between two horizontally adjacent lattice columns, and a plurality of horizontal combined supports are fixedly connected in the inner diameter direction of a space formed by the four lattice columns.
The horizontal combined support, the vertical combined support and the installation of the steel short beam are completed within 10 hours after the excavation,
(1) the fishplate 6-3 of the horizontal combined support is firstly inserted into the notch of the first round steel cylinder 6-2 for welding, and then the fusiform plate 9-3 of the vertical combined support is inserted into the notch of the second round steel cylinder 9-2 for welding.
(2) And paying off the latticed column for controlling the welding positions and elevations of the horizontal combined support, the vertical combined support and the steel short beam.
(3) When welding horizontal combination support on the lattice column, with lattice column and two adjacent first round steel section of thick bamboo welding backs, insert first octagon gusset plate 6-1 again in first round steel section of thick bamboo tip notch, then insert two other first round steel section of thick bamboo tip notches respectively on first octagon gusset plate, carry out welded connection respectively with fishplate and lattice column after having adjusted fishplate position and elevation, adjust the position of first octagon gusset plate at last, and with four first round steel section of thick bamboo welded connection, adjacent first round steel section of thick bamboo contained angle is 90 whole and is the cross, constitute horizontal combination support, other horizontal combination supports from top to bottom install in proper order.
(4) And after the first horizontal combined support is welded, welding 4 steel short beams, wherein the central line elevation of the steel short beams is superposed with the central line of the horizontal combined support.
(5) Welding vertical combination support, the one end that has the fusiformis board earlier two adjacent second round steel section of thick bamboo welded respectively with the lattice column, the steel stub beam welds, then insert second octagon gusset plate 9-1 into second round steel section of thick bamboo tip notch and install two other second round steel section of thick bamboo, with fusiformis board and lattice column after adjusting the position, steel stub beam welded connection, adjust second octagon gusset plate position at last and with 4 second round steel section of thick bamboo welded connection, adjacent second round steel section of thick bamboo contained angle is 90 wholly to be the cross, constitute vertical combination support, other vertical combination supports from top to bottom install in proper order.
S10, pouring pile top frame hoop 2 and concrete laminated cover plate 3
Stopping excavating when earthwork excavating to the distance concrete superposed cover plate upper skin elevation 5CM in the concrete superposed cover plate range, replacing with manually excavated concrete superposed cover plate, pile top frame hoop position groove body, excavating to the pile top frame hoop lower skin elevation at the lowest part, uniformly supporting a mold, binding reinforcing steel bars, pouring concrete after acceptance check and timely maintaining, and pouring and forming the pile top frame hoop and the concrete superposed cover plate at one time.
S11, mounting of tower crane
The tower crane standard knot is installed in proper order after concrete reaches design intensity in the steel square tube connecting device, and reliable, in time inspection acceptance should be connected.
The process principle of the invention is as follows:
the tower crane load is transmitted to the steel square tube connecting device through the tower crane supporting legs, then transmitted to the lattice columns and the supporting system, then transmitted to the concrete piles, and finally transmitted to the underground soil body, and the stress performance meets the normal operation requirement of the tower crane. After the tower crane finishes the construction task, the light steel cage type tower crane bed frame located in the building structure range needs to be dismantled, and at the moment, the exposed latticed column and the upper device can be directly cut and transported away.
The embodiments of the invention that are illustrated in the drawings are exemplary only and should not be taken as limiting the invention.
Claims (8)
1. The utility model provides a light-duty steel cage tower crane bed frame which characterized in that: the concrete pile frame hoop is arranged on the top of the pile; four concrete piles are square layout, concrete pile upper portion is equipped with pile bolck frame hoop, is equipped with the concrete coincide apron at pile bolck frame hoop top, every lattice column lower extreme runs through concrete coincide apron and pile bolck frame hoop and stretches into in the concrete pile that corresponds, vertical combination of rigid coupling supports and steel stub beam between two adjacent lattice columns in the horizontal direction, upwards a plurality of horizontal combination of rigid coupling support in the space internal diameter that comprises four lattice columns, steel square tube connecting device is installed respectively to every lattice column upper end, gu adorn logical long strengthening rib in the axial of every lattice column, logical long strengthening rib lower extreme penetrates the concrete pile and with the steel reinforcement cage rigid coupling of concrete pile.
2. The light steel cage tower crane pedestal of claim 1, wherein: the horizontal combined support comprises a first octagonal node plate, four first round steel cylinders and four fishplates, wherein the first octagonal node plate is located at the horizontal combined support center, one end of each fishplate is fixedly connected with one end of each first round steel cylinder, the other end of each fishplate is fixedly connected with a latticed column, the other end of each first round steel cylinder is fixedly connected with the corresponding first octagonal node plate, and the included angle of each adjacent first round steel cylinder is 90 degrees and is integrally crossed.
3. The light steel cage tower crane pedestal of claim 1, wherein: the vertical combined support comprises a second octagonal node plate, four second round steel cylinders and four shuttle-shaped plates, the second octagonal node plate is located at the vertical combined support center, one end of each shuttle-shaped plate is fixedly connected with one end of each second round steel cylinder, the other end of each shuttle-shaped plate is fixedly connected with a lattice column and a steel short beam, the other end of each second round steel cylinder is fixedly connected with the corresponding second octagonal node plate, and the included angle of the adjacent second round steel cylinders is 90 degrees and is integrally in a cross shape.
4. The light steel cage tower crane pedestal of claim 1, wherein: the steel square cylinder connecting device comprises a steel square cylinder, an annular plate, a first stiffening plate, a second stiffening plate, a supporting plate, a structural ribbed plate and tower crane supporting legs, wherein the steel square cylinder is formed by welding 4 equal-specification square steel plates, the annular plate is welded on the periphery of the steel square cylinder and is positioned at a position 100mm away from the upper edge of the steel square cylinder connecting device, the supporting plate is positioned at the bottom of the steel square cylinder and is welded with the plane centers of the steel square cylinder and the lattice columns in a superposed manner, a concrete filling hole is formed in the center of the supporting plate, vent holes are formed in the four corners of the supporting plate corresponding to the lattice columns, two rib penetrating holes are formed between every two adjacent vent holes, 16 first stiffening plates are vertically welded on the upper end surface of the supporting plate and the periphery of the steel square cylinder, 16 second stiffening plates are vertically welded on the lower end surface of the supporting plate and the periphery of the steel square cylinder, the first stiffening plates are vertically aligned with the second stiffening plates, the inner wall of the steel square barrel is connected with the tower crane supporting legs into a whole in a welding mode through a structural rib plate.
5. The light steel cage tower crane pedestal of claim 1, wherein: the lattice column is formed by welding angle steel and batten plates, the lower end of the lattice column is embedded into a concrete pile, and the embedding depth is not less than 1/3 column height.
6. The light steel cage tower crane pedestal of claim 1, wherein: the through long reinforcing ribs are made of HRB400 reinforcing steel bars with the diameter of 25mm, and the lower ends of the through long reinforcing ribs are arranged from the bottom ends of the lattice columns and are fixedly connected with a reinforcing cage of the concrete pile; the upper ends of the through long reinforcing ribs penetrate through the supporting plate and the circular holes of the bottom plate of the tower crane supporting leg to be welded with the structural rib plate of the square tube connecting device and the tower crane supporting leg; the middle part is fixedly connected with the lattice column.
7. The light steel cage tower crane pedestal of claim 1, wherein: the pile top frame hoop is of a reinforced concrete cast-in-place cross beam structure, and the horizontal projection is 9-grid-shaped.
8. The assembling construction method of the light steel cage type tower crane base frame is characterized by comprising the following steps of: the method comprises the following steps:
s1 pile position paying-off
Paying off the pile position and checking and accepting according to the tower crane position determined by a design drawing and a construction site plane layout strictly;
s2, forming holes
After the position of the pile driver is adjusted, hole forming is started, and a circulating mud retaining wall is adopted, so that hole cleaning and acceptance inspection are carried out after the designed depth is reached;
s3, manufacturing latticed column
Manufacturing lattice columns according to design requirements, wherein the lattice columns are blanked strictly according to the design length and are assembled in a special explorator to ensure the verticality of the lattice columns;
s4, installing and welding reinforcement cage and lattice column
(1) Placing a reinforcement cage before placing the lattice column, and placing the reinforcement cage down strictly according to a conventional reinforcement cage hoisting method;
(2) after the reinforcement cage is placed, correcting the lattice column, wherein the lattice column is aligned to the center of the pile hole;
(3) lowering the lattice column, inserting the lattice column into the cast-in-situ bored pile with the height below the designed top elevation of 1/3 lattice columns, respectively attaching reinforcing steel bars to the top of the cast-in-situ bored pile and the bottom of the lattice column, and fully welding the reinforcing steel bars with the two sides of the lattice column and the reinforcing cage;
s5 casting pile concrete
Pouring concrete of the concrete pile to a designed elevation and timely grouting according to design requirements;
s6, gradually excavating foundation trench and removing lattice column outer concrete
After the conditions of the construction site are allowed, excavating foundation trenches in a layered mode, removing the concrete wrapped outside the lattice column, cleaning the concrete, and meeting the requirement of the welding surface;
s7, mounting steel square tube connecting device
Processing and assembling the components of the steel square cylinder connecting device according to a drawing;
(1) penetrating the full-length reinforcing steel bars through the bar penetrating holes of the supporting plate, adjusting the supporting plate to enable the center of the supporting plate to be aligned with the center of the lattice column to be temporarily fixed, and welding the supporting plate with the batten plates and the angle steel at the top end of the lattice column;
(2) paying off the upper surface of the supporting plate, determining the outer contour control line of the steel square cylinder, the central points of the position control lines of the first stiffening plate and the second stiffening plate and the like, requiring the center of the steel square cylinder to coincide with the centers of the lattice column and the supporting plate, sequentially welding the square steel plates according to contour lines to form the steel square cylinder, and sequentially welding the ring plates to the steel square cylinder according to set positions and closing the ring plates;
(3) sequentially welding the first stiffening plates according to control lines of the first stiffening plates and the second stiffening plates, and then welding the second stiffening plates in alignment;
(4) after the 4 steel square cylinders and the first stiffening plates and the second stiffening plates on the periphery are welded, penetrating full-length reinforcing steel bars through round holes of a bottom plate of a tower crane supporting leg, adjusting the position and the elevation of the tower crane supporting leg through a standard joint support of the tower crane, then primarily fixing the tower crane supporting leg and the steel square cylinders, and welding and connecting the tower crane supporting leg and the steel square cylinders into a whole through a structural rib plate;
(5) welding the full-length reinforcing steel bars with the tower crane support leg bottom plate, the structural rib plate and the lattice column firmly;
s8 casting concrete
Pouring concrete into the steel square tube connecting device, wherein the grade of the concrete is preferably C35 or above, and the concrete is cured in time after being vibrated to be compact;
s9, installing horizontal combined support, vertical combined support and steel short beam
Vertical combined supports and steel short beams are fixedly connected between two horizontally adjacent lattice columns, and a plurality of horizontal combined supports are fixedly connected in the inner diameter direction of a space formed by the four lattice columns;
finishing horizontal combined support, vertical combined support and installation of the steel short beam within 10 hours after excavation;
(1) firstly, inserting the fishplate of the horizontal combined support into the notch of a first round steel cylinder for welding, and then inserting the fusiform plate of the vertical combined support into the notch of a second round steel cylinder for welding;
(2) paying off the latticed column to control the welding positions and elevations of the horizontal combined support, the vertical combined support and the steel short beam;
(3) when the horizontal combined support is welded on the lattice column, the lattice column is welded with two adjacent first round steel cylinders, then the first octagonal node plate is inserted into the end part notch of the first round steel cylinder, then the other two first round steel cylinder end part notches are respectively inserted onto the first octagonal node plate, after the position and the elevation of the fishplate are adjusted, the fishplate and the lattice column are respectively welded and connected, finally, the position of the first octagonal node plate is adjusted and is welded and connected with four first round steel cylinders, the included angle of the adjacent first round steel cylinders is 90 degrees, the whole body is in a cross shape, the horizontal combined support is formed, and other horizontal combined supports are sequentially installed from top to bottom;
(4) after the first horizontal combined support is welded, 4 steel short beams are welded, and the central line elevation of each steel short beam is superposed with the central line of the horizontal combined support;
(5) welding vertical combined supports, namely welding one ends of two adjacent second round steel cylinders, which are welded with shuttle-shaped plates, with a lattice column and a steel short beam respectively, inserting second octagonal node plates into end notches of the second round steel cylinders and installing the other two second round steel cylinders, welding the shuttle-shaped plates with the lattice columns and the steel short beams after adjusting the positions, finally adjusting the positions of the second octagonal node plates and welding the second octagonal node plates with 4 second round steel cylinders, wherein the included angles of the adjacent second round steel cylinders are 90 degrees and are integrally cross-shaped, so that the vertical combined supports are formed, and the other vertical combined supports are sequentially installed from top to bottom;
s10, pouring pile top frame hoop and concrete laminated cover plate
Stopping excavation when earthwork in the range of the concrete laminated cover plate is excavated to a position 5CM away from the upper skin elevation of the concrete laminated cover plate, replacing with a manually-excavated concrete laminated cover plate and a groove body at the pile top frame hoop position, uniformly supporting a mold and binding steel bars after the lowest part is excavated to the lower skin elevation of the pile top frame hoop, pouring concrete after acceptance and timely maintaining, and pouring and forming the pile top frame hoop and the concrete laminated cover plate at one time;
s11, mounting of tower crane
And (4) sequentially installing tower crane standard sections after concrete in the steel square tube connecting device reaches the design strength.
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| CN115977137A (en) * | 2022-12-20 | 2023-04-18 | 重庆大学 | Assembly type foundation suitable for mountain fan lattice type tower and assembly method thereof |
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