CN107142954B - Steel hanging box lifting system for integral lifting and lifting method thereof - Google Patents
Steel hanging box lifting system for integral lifting and lifting method thereof Download PDFInfo
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- CN107142954B CN107142954B CN201710492367.3A CN201710492367A CN107142954B CN 107142954 B CN107142954 B CN 107142954B CN 201710492367 A CN201710492367 A CN 201710492367A CN 107142954 B CN107142954 B CN 107142954B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/08—Lowering or sinking caissons
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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
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0039—Methods for placing the offshore structure
- E02B2017/0043—Placing the offshore structure on a pre-installed foundation structure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
Abstract
The invention discloses a steel hanging box hoisting system for integral hoisting and a hoisting method thereof, belonging to the field of beam lower structure construction, comprising a steel hanging box and an assembling platform thereof, wherein the assembling platform comprises a plurality of steel pile casings and a plurality of platform beams, through holes are prefabricated on the pile casing walls of the steel pile casings, a positioning guide mechanism is arranged at the holes on the steel pile casings, each platform beam is movably through a whole row of steel pile casings through the holes on the steel pile casings, and two ends of the platform beams are exposed out of the steel pile casings at two ends of the row; the steel hanging box consists of a bottom plate structure, a wall body structure, a cantilever beam, a lateral stable support and a section steel hanging rod. The invention reduces the disassembly safety risk of the assembly platform; the time for erecting and dismantling the assembly platform is shortened as much as possible, the work efficiency is improved, and the engineering progress is accelerated; the materials of the assembly platform can be recycled as much as possible; meanwhile, the hoisting construction difficulty and the labor consumption of the steel hanging box are reduced, the construction period is shortened, and the installation accuracy is easier to control.
Description
Technical Field
The invention belongs to the field of construction of beam substructure, and is suitable for construction of water hanging boxes with large-tonnage hoisting equipment.
Background
The hoisting of the steel hanging box is mainly divided into three links: and (3) erecting a steel hanging box assembly platform, assembling the steel hanging box on the assembly platform, and finally, disassembling the assembly platform and lowering the steel hanging box.
For the splicing platform of the first link, the traditional technology, namely a multipoint splicing platform:
removing pile forming equipment on the top surface of the drilling platform after the construction of the pile foundation of the bridge bearing platform is completed, and removing the bailey, bracket, parallel connection and the like in the pile casing area; then the steel pile casing is cut off to the height of the cantilever beam placing platform, steel corbels and short steel beams are welded below the steel pile casing to form a multi-point steel hanging box assembling platform, and then the assembling operation of the steel bottom plate, the side wall and the inner support of the steel hanging box is carried out on the steel hanging box assembling platform.
After the assembly is completed, the steel hanging box is lifted by adopting a crawler crane or a floating crane or a jack, then steel corbels and short steel beams on each steel pile casing are cut off, and finally the steel hanging box is lowered.
Limitations of conventional multipoint assembly platforms:
the traditional multipoint type assembly platform is simple in structure, saves steel beams, and is convenient to install and weld. But there are several limitations:
1) When the steel pile casing is cut off, a plurality of workers are required to carry cutting equipment to drill into gaps among the steel pile casings, and because the steel hanging box is in a suspended lifting state at the moment, great potential safety hazards exist, especially when the wind force is large or the tidal effect is obvious.
2) When the pile foundation interval is smaller or quincuncial isocratic arrangement is adopted, the operation space between the steel casings is narrow, the bracket and the section steel are welded on each steel casing respectively, the later stage is divided respectively, the overall work efficiency is low, and even the engineering progress is influenced.
3) Although the structure is simple, the section steel is short and is about 50cm, the number is large, and the section steel cannot be recycled in the later period, so that the material waste is caused.
And for the second and third links of steel hanging box assembly and descending, the traditional process adopts equipment (or temporary structure):
at present, the technology for lowering the steel hanging box assembled on the water platform mainly comprises two kinds of technologies: firstly, arranging a ram at the top opening of a hanging box; the ram is connected with the bottom plate of the hanging box through finish rolling deformed steel bar; lifting lugs are arranged at the crossing positions of the lifting rods, and the lifting lugs are integrally lowered through lifting equipment such as a floating crane; and after the steel pile is put down in place, the upper part of a tension-compression rod which is connected with the bottom plate of the hanging box in advance is connected with the steel pile casing or the supporting steel pipe pile. Secondly, arranging steel strands on the steel hanging box, and installing equipment such as a punching jack or a chain block on the steel casing; the steel hanging box is lowered into place through a penetrating jack or a chain block; and after the steel hanging box is lowered in place, the upper part of a tension rod which is connected with the bottom plate of the steel hanging box in advance is connected with the steel pile casing or the supporting steel pipe pile.
Limitations of traditional steel hanging boxes of water assembled platforms:
1) When the steel strand and the ram are integrally lifted and lowered, the steel strand has tensile property but not pressure resistance, and an anti-floating pulling pressure rod is required to be added for resisting the floating of the hanging box, so that the steel consumption is increased. Meanwhile, the tension and compression rod is hinged to the steel casing through on-site welding after the steel hanging box is lowered, the steel hanging box and the steel casing do not form an integral stress system in the process, the steel hanging box is easily influenced by external factors such as tides, water flow force and the like, and the installation difficulty is greatly increased.
2) The whole lowering process of the steel strand through the penetrating jack is completed in the process of finishing the dismantling of the penetrating jack and the steel strand from the installation of the anti-floating compression bar after the steel hanging box is lowered in place, so that the construction difficulty is increased, and the installation accuracy is difficult to control.
3) The tension-compression rod system is adopted, and a hinge point at the lower part of the tension-compression rod and a hinge device at the upper part of the tension-compression rod are arranged on the steel casing in advance; after the steel hanging box is lowered in place, the length of the pulling and pressing rod is adjusted according to the actual relative position so as to complete the installation of the pulling and pressing rod; at this time, the mounting platform is removed and the steel hanging box is lowered into water, so that the mounting difficulty is increased. The lifting lugs of the pulling and pressing rod are welded on site, so that the welding quality cannot be guaranteed, and the construction period is prolonged.
Disclosure of Invention
The invention aims at: the steel hanging box lifting system and the steel hanging box lifting method are used for avoiding the operation behavior with larger safety risk that a worker carries cutting equipment to drill into a pile casing gap below a bottom plate to cut when the steel hanging box is in a lifting state; the time for erecting and dismantling the assembly platform is shortened as much as possible, the work efficiency is improved, and the engineering progress is accelerated; the materials of the assembly platform can be recycled as much as possible, and unnecessary material waste is reduced; meanwhile, the hoisting construction difficulty and the labor consumption of the steel hanging box are reduced, the construction period is shortened, and the installation accuracy is easier to control.
The aim of the invention is achieved by the following technical scheme:
the steel hanging box hoisting system comprises a steel hanging box and an assembling platform thereof, wherein the assembling platform comprises a plurality of steel casings and a plurality of platform beams, through holes are prefabricated on the casing walls of the steel casings, positioning and guiding mechanisms are arranged at the holes on the steel casings, each platform beam movably penetrates through a whole row of steel casings through the holes on the steel casings, and two ends of the platform beam are exposed out of the steel casings at two ends of the row; the steel hanging box is composed of a bottom plate structure, a wall body structure, cantilever beams, lateral stable supports and steel hanging rods, wherein the bottom plate structure and the wall body structure are assembled to form the bottom surface and four walls of the steel hanging box, the cantilever beams are composed of two box beams formed by splicing two H-shaped steel, the bottom plate structure is formed by splicing 2 blocks symmetrical with longitudinal bridge symmetrical central axes, the lateral stable supports are connected between the wall body structures of the four walls along the transverse bridge and the longitudinal bridge, the cantilever beams are arranged on the top surface of the steel hanging box along the transverse bridge and the longitudinal bridge in a crossed manner, the cantilever beam ends are welded with longitudinal beams of the wall body structure, lifting lugs are arranged at the crossed positions of the cantilever beams, the lateral stable support structure is located below the cantilever beam structure, and the steel hanging rods are connected between the bottom plate structure and the cantilever beams.
According to the invention, the steel pile casing is pre-perforated, the platform beam integrally movably penetrates through the whole row of steel pile casings to form an integrated steel hanging box assembly platform, and the platform is simply and quickly erected; when the steel hanging box is lifted, the platform beam is only required to be integrally pulled out, so that the dismantling is completed, the dismantling is safe, simple and quick, an operator does not need to enter the area between the steel casings to cut and transport the steel corbels and the short platform beam, the platform beam is only integrally pulled out (the pulling-out method and the penetrating method are reverse construction) on the outer sides around the steel casings, and the dismantling of the assembled platform is completed. The dismantled platform beam can be reused, and unnecessary material waste is reduced. Meanwhile, the steel hanging box is integrally hung by the steel hanging rod, so that the defect that the traditional integral steel hanging box needs to be provided with a tension and compression rod to carry out primary force system conversion is overcome; meanwhile, the section steel suspender can be assembled with the steel hanging box on the assembly platform at one time, and the unnecessary structure is not required to be removed after the steel hanging box is put in place, so that the construction process is reduced; the installation accuracy is easier to control.
Alternatively, the positioning guide mechanism is a positioning guide frame, and the positioning guide frame is formed by welding 2 angle steels near the lower end of the open hole position of the outer steel casing. In this scheme, location guiding mechanism is used for the platform roof beam to lift by crane the back, preliminary location when the steel pile casing is run through along steel pile casing trompil. The positioning guide frame is adopted, so that the positioning is convenient, and the position of a subsequent hoisting rod piece is not occupied to influence the subsequent lowering of the steel hanging box.
Alternatively, the steel casings are provided with casing wall section reinforcing members at the openings. In the scheme, the method is used for carrying out section reinforcement on the pile casing wall at the pile casing opening position.
As a further option, the section reinforcing piece of the casing wall is an inner casing wall flitch and an outer casing wall flitch which are formed by flitch welded by inner and outer wall plates at the opening of the steel casing. In the scheme, the reinforcement of the local bearing capacity of the steel casing open hole position is realized on the premise of not occupying the position of the subsequent hoisting rod piece, the reinforcement mode is not limited to the inner and outer wall pasting plates, and the reinforcement mode can be used for carrying out differential treatment according to the weight of the steel hoisting box and the casing specification in combination with finite element stress analysis.
Alternatively, the lateral stabilizing support is a steel tube.
The hoisting method of the steel hoisting box hoisting system adopting the integral hoisting comprises the following steps in sequence:
(1) reserving holes at corresponding positions of the steel casing:
marking the corresponding plane and the elevation position of the design assembly platform on the steel pile casing after the steel pile casing is transported to a construction land site and before the steel pile casing is driven into a mud surface, and then cutting off a through hole for prefabricating a platform beam to penetrate;
(2) welding an inner flitch and an outer flitch on the steel casing:
welding a section reinforcing piece of the wall of the steel pile casing at the position of the steel pile casing opening to reinforce the section;
(3) welding a platform beam positioning and guiding mechanism on the steel casing, and arranging a platform Liang Qianyin steel wire rope:
welding a platform beam positioning and guiding mechanism at the position of the steel casing opening, and installing a traction steel wire rope at the front end of the platform beam;
(4) hoisting the platform beam, and enabling the traction steel wire rope to pass through the perforated steel casing in advance:
lifting the platform beam, and enabling the traction steel wire rope to pass through the hole opening position of the whole row of steel casing;
(5) penetrating the whole platform beam into a whole row of perforated steel pile casings to form an integrated assembly platform:
under the traction of the traction steel wire rope, positioning and guiding are performed through a positioning and guiding mechanism, and a whole row of perforated steel casings are integrally penetrated into the perforated positions of the platforms Liang Conggang casings;
(6) manufacturing and assembling a steel hanging box bottom plate in a blocking manner:
the bottom plate structure is symmetrically divided into two blocks along the central axis of the longitudinal bridge and assembled on an assembly platform;
(7) wall body, installation cantilever beam and jib are assembled in piecemeal, and installation steel pipe supports:
after the bottom plate structure is installed, the wall body structure of the steel hanging box is assembled on the bottom plate structure in a blocking way and stably supported in the lateral direction; after the installation is completed, installing a cantilever beam, wherein the end part of the cantilever beam is welded with a longitudinal beam of the wall body structure; welding the section steel suspender with the bottom plate structure and the cantilever beam;
(8) hoisting of the whole structure of the hoisting box is completed:
after the lifting device integrally lifts the lifting box to a certain height, the platform beam is integrally pulled out to finish the dismantling of the assembly platform, and then the steel lifting box is lowered.
The foregoing inventive subject matter and various further alternatives thereof may be freely combined to form a plurality of alternatives, all of which are employable and claimed herein; and the invention can be freely combined between the (non-conflicting choices) choices and between the choices and other choices. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
The invention has the beneficial effects that:
1) The potential safety hazard existing in the assembly and lowering operation of the steel hanging box is reduced:
the integrated steel hanging box assembling platform abandons the mode of multi-point installation and multi-point dismantling adopted by the traditional multi-point assembling platform, and is improved to integrally withdraw the platform beam only outside the steel casing, so that the disassembling of the assembling platform is completed. The serious potential safety hazard that a worker needs to carry the cutting equipment to drill into the gap of the protective cylinder below the bottom plate to carry out cutting operation when the steel hanging box is in a lifting state is reduced.
2) The time for installing and dismantling the platform is reduced, the work efficiency is increased, and the engineering progress is accelerated:
the installation and the dismantlement of platform roof beam only need follow outside and protect the casing preformed hole and penetrate or take out, have greatly reduced the time of assembling platform installation and dismantlement, have increased the work efficiency, have also provided a through operation platform simultaneously, supply operating personnel walking and equipment to deposit temporarily and shift, have provided the construction convenience.
3) The recycling of raw materials of the assembly platform is fully realized, and unnecessary material waste is avoided:
the main component of the integrated assembly platform is the platform beam, compared with the platform beam, the material consumption of other components such as the inner wall flitch, the outer wall flitch, the positioning guide frame and the like of the steel casing is very little, and the platform beam can be finally integrally pulled out, thereby fully realizing the recycling of raw materials and avoiding unnecessary material waste.
4) And by onshore processing and installation, the installation of all components of the steel hanging box is completed on the assembly platform at one time, so that the construction difficulty is reduced. In addition, the precision is improved, the on-site welding workload is reduced, and the welding quality is ensured
5) The steel strand is replaced by the profile steel ram with tensile compression performance, so that the defect that the steel strand does not have the compression performance is overcome, the tension compression rod is not required to be added, the steel consumption is reduced, and the construction difficulty and the labor consumption are reduced
6) The whole hoisting and lowering process of the profile steel ram is adopted to replace the penetrating jack and the steel strand lowering process, and the installation of a pulling and pressing rod is not needed, so that the primary system conversion is reduced, the construction difficulty is reduced, the construction period is shortened, and the installation accuracy is easier to control.
Drawings
FIG. 1 is a schematic elevation view of an assembly platform according to an embodiment of the present invention;
FIG. 2 is a schematic plan view of an assembly platform according to an embodiment of the present invention;
FIG. 3 is a schematic view of an inner and outer casing wall flitch of an assembly platform according to an embodiment of the present invention;
FIG. 4 is a schematic view of a platform beam integrally penetrating into an elevation during construction of an assembly platform according to an embodiment of the present invention;
FIG. 5 is a schematic view of the entire penetration of a platform beam into a plane during construction of an assembly platform according to an embodiment of the present invention;
FIG. 6 is a schematic drawing of an overall pulled-out elevation of a platform beam during construction of an assembly platform according to an embodiment of the present invention;
FIG. 7 is a schematic drawing of a whole pulled-out plane of a platform beam during construction of an assembly platform according to an embodiment of the present invention;
FIG. 8 is a schematic plan view of a steel hanging box according to an embodiment of the present invention;
FIG. 9 is a schematic view of the cross-sectional structure A-A of FIG. 8;
FIG. 10 is a plan view of a cantilever beam, lifting lug and hanger of a steel suspension box according to an embodiment of the present invention;
FIG. 11 is a side stable support floor plan view of a steel hanging box in accordance with an embodiment of the present invention;
FIG. 12 is a schematic elevation view of an assembled state of a steel hanging box according to an embodiment of the present invention;
FIG. 13 is a block diagram of a steel hanging box construction flow according to an embodiment of the present invention;
FIG. 14 is a block diagram of an assembly platform construction flow according to an embodiment of the present invention;
in the figure, 1 is a bottom plate structure, 2 is a wall body structure, 3 is a cantilever beam, 4 is a lateral stable support, 5 is a section steel suspender, 6 is a steel protective cylinder, 7 is a bracket, 8 is a communicating vessel, 9 is bearing platform concrete, 10 is back cover concrete, 11 is a first annular main beam, 12 is a second annular main beam, 13 is an annular secondary beam, 16 is a lifting lug, 20 is a platform beam, and 30 is an inner and outer protective cylinder wall flitch.
Detailed Description
The following non-limiting examples illustrate the invention.
Referring to fig. 1 to 3, 8, 9 and 12, a steel hanging box hanging system for integral hanging comprises a steel hanging box and an assembling platform thereof.
The assembly platform comprises a plurality of steel casings 6 and a plurality of platform beams 20, through holes are prefabricated on the casing walls of the steel casings 6, each platform beam 20 movably penetrates through a whole row of steel casings 6 through the holes on the steel casings 6, and two ends of each platform beam 20 are exposed out of the steel casings 6 at two ends of the row. Alternatively, the hole on each steel casing 6 is provided with a positioning guide mechanism, and as shown in the drawing of the embodiment, the positioning guide mechanism is a positioning guide frame, and the positioning guide frame is formed by welding 2 angle steels near the lower end of the hole on the outer steel casing 6. The opening of each steel casing 6 is also provided with a section reinforcing member of the casing wall, as shown in the drawings of the embodiment, the section reinforcing member of the casing wall is an inner and outer casing wall flitch 30, and the inner and outer casing wall flitch 30 is formed by flitch welded by inner and outer wall plates at the opening of the steel casing 6.
As an example, taking a steel hanging box assembly platform with pile foundation diameter of 3.06m, pile casing diameter of 3.1m and pile casing center-to-center distance of 5.6m as an example, the structural composition is introduced as follows:
platform beam 20: the 2HN600 multiplied by 200 section steel is adopted, the holes are reserved through the steel casing 6, and the whole row of the holes are integrally penetrated into the steel casing 6 by adopting a traction device.
Perforated steel casing 6: the steel casing 6 is cut in a small area at the platform beam 20 penetration position in advance.
Inner and outer cartridge wall stickers 30: and welding a flitch at the opening of the inner wall plate and the outer wall plate of the steel casing 6 to reinforce the section.
Positioning guide frame: only 2 short steel angles are welded near the lower end of the opening position of the outer steel casing 6 and are used for preliminary positioning after the platform beam 20 is lifted.
Traction wire rope: after the platform beam is lifted, the steel wire rope passes through the perforated steel casing 6 in advance.
Taking a bridge approach bearing platform with the plane size of 26m multiplied by 11m and the height of 3.5m as an example, the structural composition of the steel hanging box is as follows:
the panel of the steel hanging box bottom plate structure 1 adopts a 6mm steel plate, and a profile steel framework is formed by welding 2I32a and ∈200x100. The base plate structure 1 is not subjected to corrosion prevention design, and is subjected to simple rust prevention treatment during construction. The base plate structure 1 adopts a block manufacturing and forming construction process, the weight is 37.6t, the base plate structure is divided into 2 blocks according to the longitudinal bridge symmetry central axis, and the weight of each block is not more than 20t. During the partitioning, the side sills should be staggered, so that the butt joint quality of the bottom plate structure 1 is ensured.
The cantilever beam 3 is composed of box beams formed by splicing two H-shaped steel beams of HM488x300 (the model and the size of the bottom plate beam are calculated and determined according to the size of a bearing platform and the construction working condition), and phi 630 steel pipes are arranged between the wall structures 2 to form lateral stable supports 4 for guaranteeing the overall stability of the structure.
The bottom plate structure 1 and the cantilever beam 3 are connected by adopting a HW150x150 steel boom 5, so that a space stress structure consisting of the bottom plate structure 1, the steel boom 5, the cantilever beam 3 and the lateral stable support 4 of the wall body is formed.
The wall body structure 2 is formed by welding and combining profile steel and a steel plate as a general steel hanging box.
Referring to fig. 13 and 14, the construction method of the steel hanging box for integral hanging comprises the following steps:
(1) the corresponding position of the steel casing 6 is reserved with an opening:
after the steel pile casing 6 is transported to a construction land site, before the pile is driven into a mud surface, the corresponding plane and the elevation position of the design assembly platform on the steel pile casing 6 are marked, then the tapping is cut, the follow-up operation of penetrating into the platform beam is considered during cutting, and proper operation gaps are reserved.
(2) Welding an inner flitch and an outer flitch on the steel casing:
the inner and outer protective cylinder wall flitch 30 is welded at the position of the steel protective cylinder 6 for section reinforcement, the reinforcement mode is not limited to the inner and outer wall flitch, and the steel protective cylinder can be treated differently according to the weight of the steel hanging box and the protective cylinder specification in combination with finite element stress analysis, and the principle is to realize the reinforcement of the local bearing capacity of the position of the steel protective cylinder on the premise of ensuring that the position of a subsequent hanging rod piece is not occupied.
(3) Welding a platform beam positioning guide frame on the steel casing 6, and arranging a platform Liang Qianyin steel wire rope:
the platform beam positioning guide frame is welded at the lower end of the hole opening position of the steel pile casing 6, and a structure of 2 short angle steels is adopted, so that the positioning is convenient, and the position of a subsequent hoisting rod piece is not occupied to influence the subsequent steel hanging box to be lowered; and traction steel wire ropes are arranged at the front end of the platform beam, 2 traction steel wire ropes are arranged at the top and the bottom of the web respectively.
(4) Hoisting platform beam 20, passing the traction wire rope through the perforated steel casing in advance:
the platform beam is lifted by an automobile crane or other lifting equipment, and a traction steel wire rope is manually or otherwise penetrated from the position of the holes of the whole row of steel casing.
(5) Referring to fig. 4 and 5, the arrow in the drawing indicates the overall insertion direction of the platform beam. Penetrating the whole platform beam into a whole row of perforated steel casings 6 to form an integrated assembly platform:
the platform beam 20 has been cut to standard design dimensions and the structures such as stiffening plates at the pivot points have been welded, the periphery of the platform beam polished smooth, and butter applied to reduce the coefficient of friction.
The platform beam 20 is moved to the position of the positioning frame by using hoisting equipment to perform preliminary positioning, fine adjustment is performed to enable the positioning frame to be accurately positioned, then the platform beam 20 is integrally penetrated from a reserved hole of the steel pile casing 6, and then penetration of other platform beams is completed successively to form an integrated assembly platform.
(6) And (3) completing steel hanging box assembly:
and after the pouring of the concrete pile in the steel pile casing 6 at the pier position is completed, the construction of integrally hoisting the steel hanging box by the section steel hanging rod can be started.
1) Manufacturing and assembling a steel hanging box bottom plate in a blocking manner:
in order to ensure that the bottom plate structure 1 can be disassembled on water under the condition of not cutting off the bottom plate beam after the pouring of the bearing platform is completed, thereby ensuring the subsequent turnover use of the bottom plate structure 1, and the bottom plate structure 1 is symmetrically split into two blocks along the central axis of the longitudinal bridge to be assembled on an assembling platform (see figure 8).
2) Wall body, installation cantilever beam and jib are assembled in piecemeal, and installation steel pipe supports:
after the bottom plate structure 1 is installed, the wall body structure 2 of the steel hanging box and the lateral stable support 4 of the steel pipe are assembled on the bottom plate structure 1 in a blocking manner; after the wall body structure 2 is installed, installing a cantilever beam 3, and welding the end part of the cantilever beam 3 with a longitudinal beam of the wall body structure 2; the section steel suspender 5 is welded with the bottom plate structure 1 and the cantilever beam 3, and is provided with a stiffening plate. The steel hanging box wall body structure 2, the cantilever beam 3 and the section steel hanging rod 5 are shown in figures 10 and 11.
3) Hoisting of the whole structure of the hoisting box is completed:
and (5) lifting the whole hanging box by 50cm through lifting equipment, dismantling the assembly platform, and lowering the steel hanging box.
The assembly platform is shown with reference to fig. 6 and 7, and the arrow in the figure is the overall insertion direction of the platform beam. Lifting the steel hanging box, integrally extracting the platform beam 20, and finishing the dismantling:
the steel corbels and the short platform beams are cut and transferred without entering the area between the steel casings 6 by operators, and the platform beams 20 are integrally extracted only from the outer sides of the periphery of the steel casings 6 (the extraction method and the penetration method are reverse construction), so that the assembly platform is disassembled.
(7) Pouring back cover concrete:
after the hanging box is put down in place, pouring 1.5m thick back cover concrete 10, and roughening the surface of the concrete after the concrete reaches 75% of the design strength.
(8) And (5) dismantling the cantilever beam system of the steel hanging box. The method comprises the following specific steps:
1. when the strength of the back cover concrete 10 reaches the design strength (30 Mpa), water pumping in the steel hanging box is started. Before pumping water, the communicating vessel of the bottom plate of the underwater steel hanging box is blocked at a low tide level, a customized sealing rubber ring is covered on a flange plate of the communicating vessel during blocking, then a cover plate is covered, and a cover plate bolt is tightened.
In the water pumping process, the deformation condition of the steel hanging box structure is observed at any time, if abnormality is found, water pumping or recharging is immediately stopped, and the hanging box is continuously pumped after treatment until the water pumping is completed.
Because the interval time between the back cover and the water pumping is longer, more silt is possibly deposited in the steel hanging box, the surface of the back cover concrete can be washed by using a high-pressure water gun, and then the mud water is pumped out by using a mud pump or a submersible pump.
2. The steel hanging box lowering system is disassembled, comprising the cantilever beam 3 and the section steel hanging rod 5, and the principle of from bottom to top is followed.
3. After the lowering system is dismantled, the steel pile casing of the part above the pile head of the bored pile is cut off once, the part below the pile head, which is not chiseled off, is cut off by dividing the steel pile casing into 2 blocks, and the elevation of the top of the pile casing is ensured to be-1.85 m. And after the pile casing is cut off, the air pick is used for chiseling redundant concrete on the pile top, so that the elevation of the concrete top is consistent with the elevation of the steel pile casing top.
(9) Pouring the bearing platform and dismantling the steel hanging box:
and binding bearing platform reinforcing steel bars after the back cover concrete 10 reaches the design strength, and pouring bearing platform concrete 9. And after the concrete reaches a certain strength, dismantling the steel hanging box bottom plate structure 1 and the wall body structure 2.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The utility model provides a steel hanging box hoisting system of integral hoisting, includes steel hanging box and pin-connected panel thereof, its characterized in that: the assembly platform comprises a plurality of steel casings and a plurality of platform beams, wherein through holes are prefabricated on the casing wall of each steel casing, a positioning guide mechanism is arranged at the holes on each steel casing, each platform beam movably penetrates through a whole row of steel casings through the holes on each steel casing, and two ends of each platform beam are exposed out of the steel casings at two ends of the row; the steel hanging box is composed of a bottom plate structure, a wall body structure, cantilever beams, lateral stable supports and steel hanging rods, the bottom plate structure and the wall body structure are assembled to form the bottom surface and four walls of the steel hanging box, the cantilever beams are composed of two box beams formed by splicing two H-shaped steel, the bottom plate structure is formed by splicing 2 blocks symmetrical with longitudinal bridge symmetrical central axes, the lateral stable supports are connected between the wall body structures of the four walls along the transverse bridge and the longitudinal bridge, the cantilever beams are arranged on the top surface of the steel hanging box along the transverse bridge and the longitudinal bridge in a crossed manner, the cantilever beam end parts are welded with the longitudinal beams of the wall body structure, lifting lugs are arranged at the crossed positions of the cantilever beams, the lateral stable support structure is located below the cantilever beam structure, and the steel hanging rods are connected between the bottom plate structure and the cantilever beams.
2. The integrally hoisted steel hanging box hoisting system as claimed in claim 1, characterized in that: the positioning guide mechanism is a positioning guide frame, and the positioning guide frame is formed by welding 2 angle steels near the lower end of the open hole position of the outer steel casing.
3. The integrally hoisted steel hanging box hoisting system as claimed in claim 1, characterized in that: the hole on each steel pile casing is provided with a pile casing wall section reinforcing piece.
4. A steel hoist box hoisting system for integral hoisting as claimed in claim 3, characterized in that: the section reinforcing piece of the protective cylinder wall is an inner protective cylinder wall flitch and an outer protective cylinder wall flitch which are formed by flitch welded by inner and outer wall plates at the opening of the steel protective cylinder.
5. The integrally hoisted steel hanging box hoisting system as claimed in claim 1, characterized in that: the lateral stable support is a steel pipe.
6. Hoisting method of a steel hoisting box hoisting system employing integral hoisting according to any one of claims 1 to 5, characterized by comprising the following steps in order:
(1) reserving holes at corresponding positions of the steel casing:
marking the corresponding plane and the elevation position of the design assembly platform on the steel pile casing after the steel pile casing is transported to a construction land site and before the steel pile casing is driven into a mud surface, and then cutting off a through hole for prefabricating a platform beam to penetrate;
(2) welding an inner flitch and an outer flitch on the steel casing:
welding a section reinforcing piece of the wall of the steel pile casing at the position of the steel pile casing opening to reinforce the section;
(3) welding a platform beam positioning and guiding mechanism on the steel casing, and arranging a platform Liang Qianyin steel wire rope:
welding a platform beam positioning and guiding mechanism at the position of the steel casing opening, and installing a traction steel wire rope at the front end of the platform beam;
(4) hoisting the platform beam, and enabling the traction steel wire rope to pass through the perforated steel casing in advance:
lifting the platform beam, and enabling the traction steel wire rope to pass through the hole opening position of the whole row of steel casing;
(5) penetrating the whole platform beam into a whole row of perforated steel pile casings to form an integrated assembly platform:
under the traction of the traction steel wire rope, positioning and guiding are performed through a positioning and guiding mechanism, and a whole row of perforated steel casings are integrally penetrated into the perforated positions of the platforms Liang Conggang casings;
(6) manufacturing and assembling a steel hanging box bottom plate in a blocking manner:
the bottom plate structure is symmetrically divided into two blocks along the central axis of the longitudinal bridge and assembled on an assembly platform;
(7) wall body, installation cantilever beam and jib are assembled in piecemeal, and installation steel pipe supports:
after the bottom plate structure is installed, the wall body structure of the steel hanging box is assembled on the bottom plate structure in a blocking way and stably supported in the lateral direction; after the installation is completed, installing a cantilever beam, wherein the end part of the cantilever beam is welded with a longitudinal beam of the wall body structure; welding the section steel suspender with the bottom plate structure and the cantilever beam;
(8) hoisting of the whole structure of the hoisting box is completed:
after the lifting device integrally lifts the lifting box to a certain height, the platform beam is integrally pulled out to finish the dismantling of the assembly platform, and then the steel lifting box is lowered.
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| CN201710492367.3A CN107142954B (en) | 2017-06-26 | 2017-06-26 | Steel hanging box lifting system for integral lifting and lifting method thereof |
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| CN201710492367.3A CN107142954B (en) | 2017-06-26 | 2017-06-26 | Steel hanging box lifting system for integral lifting and lifting method thereof |
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| CN107142954B true CN107142954B (en) | 2023-09-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107964975B (en) * | 2017-10-27 | 2020-05-19 | 广东省交通规划设计研究院股份有限公司 | Construction method of PBL (Poly-p-phenylene benzobisoxazole) shear force key connection structure of steel pipe composite pile and bearing platform |
| CN107966405A (en) * | 2017-12-25 | 2018-04-27 | 合肥工业大学 | A kind of laboratory model construction on concrete and steel pile casting bonding characteristic |
| CN111042006B (en) * | 2020-01-16 | 2022-04-15 | 中建七局安装工程有限公司 | High pier edge span suspension casting beam Bailey truss structure and construction method thereof |
| CN113323006A (en) * | 2021-05-28 | 2021-08-31 | 福建永福电力设计股份有限公司 | Auxiliary device and method for assembling offshore wind power suction pile and jacket |
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