CN114908673B - Deep water foundation trestle and drilling platform construction method - Google Patents
Deep water foundation trestle and drilling platform construction method Download PDFInfo
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- CN114908673B CN114908673B CN202210531349.2A CN202210531349A CN114908673B CN 114908673 B CN114908673 B CN 114908673B CN 202210531349 A CN202210531349 A CN 202210531349A CN 114908673 B CN114908673 B CN 114908673B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D18/00—Bridges specially adapted for particular applications or functions not provided for elsewhere, e.g. aqueducts, bridges for supporting pipe-lines
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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
- 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
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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
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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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
- E02B2017/0039—Methods for placing the offshore 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
- E02B2017/0039—Methods for placing the offshore structure
- E02B2017/0043—Placing the offshore structure on a pre-installed foundation structure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The application provides a deep water foundation trestle and a drilling platform construction method, comprising the following steps: step S1, conveying a pre-processed workpiece to a construction site; s2, immediately constructing a coupling system among the pier steel pipe piles and a pile top distribution beam after the construction of the steel pipe pile at each pier is completed; step S3, conveying the bridge deck to the site through a flat car, hoisting the bridge deck to the position above the Bailey beam, and installing guardrails immediately after the bridge deck is installed; and S4, repeating the steps S2-S3, and constructing pier by pier along the design drawing until the construction of trestle and drilling platform at all pier positions is completed. The steel pipe piles, the pile top distribution beams, the bailey beams and the bridge deck boards are prefabricated in a processing factory and then transported to a construction site in advance, so that the factory and standardized operation of trestle construction is realized, the construction is not influenced by weather and site environment, the rapidity and standardization of trestle engineering are realized, the construction speed is greatly improved, and the construction environment is improved.
Description
Technical Field
The application belongs to the technical field of bridge engineering construction, and particularly relates to a deep water foundation trestle and a drilling platform construction method.
Background
In the modern bridge construction process, the steel trestle becomes an indispensable auxiliary tool in the bridge construction process so as to meet the transfer requirements of various construction resources such as people, materials, machines and the like. The trestle is required to bear various construction loads, the requirements of safety, economy and universality of materials are met, the trestle which is often required to be built is long, the input manpower and the input material are relatively large, and the construction speed of the trestle and the drilling platform is directly influenced.
Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The application aims to overcome the defects in the prior art and provides a deep water foundation trestle and a drilling platform construction method.
In order to achieve the above object, the present application provides the following technical solutions:
a construction method of a deep water foundation trestle and a drilling platform comprises the following steps:
step S1, conveying the prefabricated steel pipe pile, pile top distribution beams, bailey beams and bridge decks to a construction site;
s2, carrying out sinking construction of the steel pipe pile after measuring and confirming the position of the steel pipe pile, and immediately carrying out construction of a coupling system among the steel pipe piles at each pier position and a pile top distribution beam after the construction of the steel pipe pile at each pier position is completed; hoisting the bailey beam to the corresponding distribution beam, and fixing the bailey beam;
step S3, conveying the bridge deck to the site through a flat car, hoisting the bridge deck to the position above the Bailey beam, and installing guardrails immediately after the bridge deck is installed;
and S4, repeating the steps S2-S3, and constructing pier by pier along the design drawing until the construction of trestle and drilling platform at all pier positions is completed.
Preferably, the trestle comprises a main trestle and a branch trestle, the pier foundation of each pier position comprises a first bearing platform and a second bearing platform which are separated from each other, the trestle and the drilling platform are divided into a plurality of areas, and construction is carried out on each area in sequence.
Preferably, construction is carried out on two sides of a river channel at the same time, an abutment is arranged on one side of the river channel, excavation is carried out after the laying-out of the excavation boundary line of an abutment foundation pit is carried out, and after the excavation is completed, prefabricated reinforcing steel bars are placed in the river channel and abutment pouring is carried out; the main trestle is arranged on one side close to the first bearing platform on the pier position on one side close to the bridge abutment;
the supporting bridge of the side, close to the main trestle, of the first bearing platform is a first area A;
the side of the second bearing platform, which is close to the main trestle, is provided with a trestle as a second area A;
a drilling platform corresponding to the periphery of the first bearing platform, and a trestle between the two bearing platforms and close to the first bearing platform are a third area A;
the trestle at one side of the first bearing platform, which is far away from the second bearing platform, is a fourth area A;
the supporting bridge of one side, far away from the main supporting bridge, of the first bearing platform and the second bearing platform is a fifth area A;
the drilling platform corresponding to the second bearing platform and the supporting trestle corresponding to the two sides of the second bearing platform are a sixth area A;
sequentially constructing a first area A and a second area A, and constructing a fourth area A while constructing the second area A;
and (3) performing construction of a third area A after the construction of the second area A is completed, performing construction of a fifth area A after the construction of the fourth area A is completed, and performing construction of a sixth area A after the construction of the fifth area A is completed.
Preferably, after the construction of the trestle and the drilling platform corresponding to the pier position is completed, the sinking construction of the steel casing corresponding to the pier position is carried out.
Preferably, the main trestle is connected with the river levee through a trestle slope, and the main trestle is arranged on one side close to the first bearing platform on the pier position on one side close to the trestle slope;
wherein the landing stage slope is a first area B,
the supporting trestle of the side, far away from the second bearing platform, of the main trestle is a second area B;
the drilling platforms corresponding to the two bearing platforms, the supporting trestle between the two bearing platforms and the supporting trestle on one side of the second bearing platform far away from the first bearing platform are a third area B;
the supporting trestle of one side of the two bearing platforms, which is close to the main trestle, is a fourth area B;
the supporting trestle of one side of the two bearing platforms, which is far away from the main trestle, is a fifth area B;
simultaneously constructing a first area B and a second area B, constructing a third area B after the construction of the steel pipe pile of the second area B is completed, and constructing a fifth area B after the construction of the bridge deck of the second area B is completed;
and after the construction of the steel pipe pile in the third region B is completed, carrying out the construction of the fourth region B.
Preferably, after the construction of the fourth area B is completed, the sinking construction of the steel casing corresponding to the pier position can be performed.
Preferably, in step S2, after the pile top distribution beam is manufactured, the pile top distribution beam is transported to the site, the pile top distribution beam is placed into a notch on the steel pipe pile through cantilever assembly guide frame platform operation, and brackets are mounted and welded on the distribution beam and the steel pipe pile; and (3) manufacturing a connection system after measuring and lofting the connection positions on the steel pipe piles, wherein the connection system between two adjacent steel pipe piles comprises two horizontal rods longitudinally distributed at intervals and inclined rods crossly distributed between the two horizontal rods, welding horizontal channel steel firstly, and welding the inclined rods after the horizontal channel steel is welded and fixed.
Preferably, in step S3, the bridge deck is lifted to the flatbed after finishing the processing, the bridge deck is stacked in a positive-negative manner, the female head is longitudinally connected with the installed bridge deck during the installation of the bridge deck, after the bridge deck is installed in place, the bridge deck is fixed through the U bolts and the pressing plate machine core, the block length of the bridge deck is designed according to the width of the bridge deck, and the width is designed according to the distance between the beams above the beret beams.
Preferably, in step S2, the bailey beam is preassembled, a measurement lofting is performed on the steel pipe pile to determine the erection position of the bailey frame, and the bailey beam to be installed is lifted and then placed behind the assembled bailey beam, so that the bailey beam extends along a straight line.
Preferably, the construction method further comprises a step S5, after the construction is completed, the bridge deck system, the bailey beam, the distribution beam and the connection system are removed in sequence in the reverse order of installation, and the steel pipe pile is removed by a vibrating hammer in cooperation with underwater cutting or blasting.
The beneficial effects are that: the steel pipe piles, the pile top distribution beams, the bailey beams and the bridge deck boards are prefabricated in a processing factory and then transported to a construction site in advance, so that the factory and standardized operation of trestle construction is realized, the construction is not influenced by weather and site environment, the rapidity and standardization of trestle engineering are realized, the construction speed is greatly improved, and the construction environment is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. Wherein:
FIG. 1 is a schematic view of region division corresponding to a pier near an abutment in an embodiment of the present application;
fig. 2 is a schematic diagram of region division corresponding to a pier near a landing stage slope according to an embodiment of the present application.
In the figure: 1. a first bearing platform; 2. the second bearing platform; 3. a first region A; 4. a second region A; 5. a sixth region a; 6. a third region A; 7. a fourth region a; 8. a fifth region a; 9. a second region B; 10. a fifth region B; 11. a fourth region B; 12. a first region B; 13. and a third region B.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.
In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present application and do not require that the present application must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "coupled" and "connected" as used herein are to be construed broadly and may be, for example, fixedly coupled or detachably coupled; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.
The application will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
As shown in fig. 1-2, a construction method for a deep water foundation trestle and a drilling platform comprises the following steps: step S1, leveling a trestle processing field and a road, and transporting the prefabricated steel pipe piles, pile top distribution beams, bailey beams and bridge decks to a construction site; factory and standardized operation of trestle construction is realized, and rapid and standardized trestle engineering is ensured; s2, carrying out steel pipe pile sinking construction after measuring and confirming the positions of the steel pipe piles, wherein steel pipe pile piling equipment mainly comprises a crawler crane and a vibratory pile hammer, and immediately carrying out construction of a coupling system among the steel pipe piles at each pier position and pile top distribution beam after the construction of the steel pipe piles at each pier position is completed; hoisting the bailey beam to the corresponding distribution beam, and fixing the bailey beam; s3, the bridge deck comprises a plurality of blocks, the bridge deck is transported to the site through a flat car and then hoisted above the Bailey beam, and guardrails are installed immediately after the bridge deck is installed; and S4, repeating the steps S2-S3, and constructing pier by pier along the design drawing until the construction of trestle and drilling platform at all pier positions is completed.
The steel pipe pile is transported to a field processing workshop by a 12m spiral pipe, is lengthened to the design length on site one by one according to the pier position from a small mileage side according to the design, the joint is welded by adopting a groove, and then a reinforcing plate is welded at a top opening and a bottom opening. And processing the pile top distribution beam according to the drawing size.
The Bailey tablets are assembled into standard components on a single piece in a back field, and then 2 tablets are assembled into a standard group. The bridge deck is made of 10mm steel plates.
In another optional embodiment, construction is performed simultaneously on two sides of a river channel, construction efficiency can be greatly improved, a trestle comprises a main trestle and a supporting trestle, a pier foundation of each pier position comprises a first bearing platform 1 and a second bearing platform 2 which are separated from each other, the trestle and a drilling platform are divided into a plurality of areas, the areas are sequentially constructed, the trestle and the drilling platform corresponding to each pier position are constructed in areas, construction sequence can be optimized, and construction efficiency is improved.
In another alternative embodiment, an abutment is arranged on one side of a river course, an enlarged foundation filled outside a embankment body is adopted as the abutment, a filling channel is connected with a channel on the back water side of the embankment body, the abutment is firstly excavated after the laying of excavation edge line of an abutment foundation pit is carried out, the bearing capacity of the pit bottom is checked after the excavation is completed, and prefabricated reinforcing steel bars are placed in a designated position and then the abutment is poured; in the pier position close to one side of the bridge abutment, the main trestle is arranged on one side close to the first bearing platform 1 and is correspondingly connected with the bridge abutment, wherein the main trestle and the branch trestle of the first bearing platform 1 on one side close to the main trestle are a first area A3; the side of the second bearing platform 2, which is close to the main trestle, is provided with a second area A4; a drilling platform corresponding to the periphery of the first bearing platform 1, and a supporting trestle between the two bearing platforms and close to the first bearing platform 1 are a third area A6; the trestle at one side of the first bearing platform 1 far away from the second bearing platform 2 is a fourth area A7; the supporting bridge of one side, far away from the main supporting bridge, of the first bearing platform 1 and the second bearing platform 2 is a fifth area A8; the drilling platform corresponding to the second bearing platform 2 and the trestle corresponding to the two sides of the second bearing platform 2 are a sixth area A5; sequentially performing construction of a first area A3 and a second area A4, and performing construction of a fourth area A7 while performing construction of the second area A4; and after the construction of the second area A4 is completed, the construction of the third area A6 is performed, after the construction of the fourth area A7 is completed, the construction of the fifth area A8 is performed, and after the construction of the fifth area A8 is completed, the construction of the sixth area A5 is performed. In the embodiment, each region is constructed by adopting a fishing method, and each region is crossed in time and space, so that the construction efficiency is effectively improved.
In this embodiment, the construction of the trestle and the drilling platform of each pier position is sequentially performed by the method. After the construction of the trestle and the drilling platform corresponding to each pier position is completed, the steel pile casing corresponding to the pier position is subjected to sinking construction, so that the pier foundation of the current pier position and the trestle and the drilling platform of the subsequent pier position can be constructed simultaneously, and the construction efficiency is improved.
In another optional embodiment, a trestle slope is arranged on the river channel, the main trestle is connected with the river levee through the trestle slope, the condition that equipment vehicles reach the main trestle from the channel is met, and the main trestle is arranged on one side close to the first bearing platform 1; the trestle slope is a first area B12, and the main trestle and the trestle on one side of the first bearing platform 1, which is far away from the second bearing platform 2, are second areas B9; the drilling platforms corresponding to the two bearing platforms, the supporting bridge between the two bearing platforms and the supporting bridge on one side, far away from the first bearing platform 1, of the second bearing platform 2 are a third area B13; the supporting trestle of one side of the two bearing platforms, which is close to the main trestle, is a fourth area B11; the supporting trestle of one side of the two bearing platforms, which is far away from the main trestle, is a fifth area B10; simultaneously constructing a first area B12 and a second area B9, constructing a third area B13 after the construction of the steel pipe pile of the second area B9 is completed, and constructing a fifth area B10 after the construction of the bridge deck of the second area B9 is completed; and after the construction of the steel pipe pile in the third region B13 is completed, the construction of the fourth region B11 is carried out. In this embodiment, each first area B12 and each fifth area B10 are constructed by adopting a fishing method, each second area B9, each third area B13 and each fourth area B11 are constructed by adopting a floating crane method to pile and match with a fishing method to lay a bridge deck, and each area is crossed in time and space, so that the construction efficiency is effectively improved.
In this embodiment, after the construction of the fourth area B11 is completed, the sinking construction of the steel casing corresponding to the pier position can be performed. Bridge pier foundation construction can be carried out when trestle and drilling platform are constructed, and construction efficiency is improved.
In another alternative embodiment, the application provides two trestle and drilling platform construction steps, two methods are adopted to construct opposite directions on two sides of a river channel respectively, and closure is carried out in the middle of the river channel.
Or the two sides of the river channel are oppositely constructed by adopting the same method, closure is carried out in the middle of the river channel, and the two construction methods are respectively aimed at trestle bridges with bridge decks and trestle slopes, so that the two methods can be selected independently by a person in the field according to the river channel environment.
In another alternative embodiment, in step S2, after the pile top distribution beam is manufactured, the pile top distribution beam is transported to the site, the pile top distribution beam is hoisted in place by a two-point hoisting mode of a crawler crane, the top of a cantilever spliced bracket is measured, the design elevation of the steel pipe top is found out by taking the measurement as a reference plane, an operator gas cuts a notch with the size of 29cm wide and 25cm deep according to the design size of the pile top, the bottom surface is smooth, the pile top distribution beam is placed into the notch on the steel pipe pile through the cantilever spliced bracket platform operation, and brackets are welded on the distribution beam and the steel pipe pile; the method comprises the steps of manufacturing a connection system after measuring and lofting the connection positions on steel pipe piles, measuring the clear distance blanking between the steel pipe piles by operators, wherein the connection system between two adjacent steel pipe piles comprises two horizontal rods distributed longitudinally at intervals and inclined rods distributed between the two horizontal rods in a crossing manner, welding horizontal channel steel, welding the horizontal channel steel, and then welding the inclined rods after welding and fixing the horizontal channel steel, and manufacturing the connection system according to the blanking according to the actual measurement, so that the precision of the connection system is ensured, the installation difficulty is reduced, and the fixing effect is improved.
In an alternative embodiment, in step S3, the deck system is manufactured by rear standardized, factory-like dicing. And lifting the bridge deck plates to a flat car after the bridge deck plates are processed, superposing the bridge deck plates in a positive-negative mode, reinforcing the bridge deck plates by using a steel wire rope, and conveying the bridge deck plates to field lifting. When the bridge deck is installed, the female head is longitudinally connected with the installed bridge deck, after the bridge deck is installed in place, the bridge deck is fixed through the U-shaped bolts and the pressing plate machine core, and when the bridge deck is transversely placed, a bailey piece is corresponding to the position right below each U-shaped bolt pressing beam, so that the installation of the U-shaped bolts is facilitated. After the bridge deck is installed in place, the U bolts and the pressing plates are installed manually, and nuts are fastened by using a spanner, so that firmness and reliability are ensured. The blocking length of the bridge deck is designed according to the width of the bridge deck of the trestle, and the width is designed according to the distance between the cross beams above the Bailey beams.
In another alternative embodiment, in step S2, the bailey beams are pre-assembled, the bailey frame erection position is determined by measuring and lofting on the steel pipe pile, the bailey beams to be installed are hoisted and then placed behind the assembled bailey beams, the bailey beams extend along a straight line, every two (three) sheets of the bailey beams are divided into a group, a group of bailey beams is firstly installed on a flat car or a crawler crane, the bailey beams are firmly bound on a cross beam after being accurately positioned, then a limiter is welded, another group of bailey beams is installed, meanwhile, the bailey beams are connected with the installed group of bailey beams through a scissor, and the whole span of the bailey beams is installed by analogy.
In another optional embodiment, the construction method further retains step S5, after the construction is completed, the bridge deck system, the beret beams, the distribution beams and the connection system are removed sequentially in reverse order of installation, and the steel pipe piles are removed by a vibrating hammer in cooperation with underwater cutting or blasting. Deck system demolition is performed in reverse order of installation. Firstly, cutting off trestle railings, then cutting off small connecting steel plates between bridge decks, and hoisting the separated bridge decks nearby. The bailey beam adopts a grouping hoisting method, each span is divided into four groups, and each group is 2 truss. During construction, the support frame between each truss is firstly disassembled, then the pin shafts between the two spans are disassembled, and then the crawler crane or the floating crane is utilized for overall disassembly. Pile top distribution beam removal should follow a top-down sequence: the distribution beam is cut off and connected with the pile head, the integral units of the longitudinal distribution beam and the transverse distribution beam are integrally dismantled onto the transport ship through the crawler crane or the floating crane, and the integral units of the longitudinal distribution beam and the transverse distribution beam are decomposed on the transport ship and are split into single-group distribution beam components. And (3) for dismantling the connection system to be fixedly connected with the steel pipe pile, reversely hanging the pile top of the connection system, dismantling the fixedly connected part, and integrally dismantling the connection system to the flat car by utilizing the crawler crane. For the connection system and the steel pipe pile consolidation which can not be removed, the connection system is reversely hung on the pile top, the connection system is directly cut off at the steel pipe pile or the whole connection system sleeve (when the connection system is cut off, the protection of the steel pipe pile should be paid attention to), and the connection system is integrally removed to the flat car by utilizing the crawler crane or the floating crane. When the pile is pulled out, as the soil body around the pile gradually stabilizes after the steel pipe pile is used for a period of time, the friction force of the pile soil is increased, the difficulty of pile pulling out is increased, and the vibration hammer is arranged for pulling out, so that the pile is matched with underwater cutting or blasting for dismantling when necessary.
In another alternative embodiment, in order to ensure that the main trestle can meet the traffic load of a 200t rotary drilling rig or the two concrete transport vehicles are staggered, the total width of the trestle is 8m. 5 groups of the Bailey beam cross bridges are respectively and intensively arranged on two sides, and 10 pieces are totally arranged. And each end part and the lower chord of the bailey beam are transversely connected by adopting a supporting frame. Bridge deck width is 8.0m, and pile top distribution beams are I45a double-spliced I-steel; the longitudinal beam adopts a bailey beam combined truss; the bottom die distribution beam adopts I20a I-steel (the interval is 300 mm), and the distribution beam is connected with the Bailey beam through a U-shaped bolt; the distribution beam is laid with bridge decks. It is to be understood that the above description is intended to be illustrative, and that the embodiments of the present application are not limited thereto.
The foregoing description of the preferred embodiments of the application is not intended to limit the application to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the application as defined by the appended claims.
Claims (5)
1. A construction method of a deep water foundation trestle and a drilling platform is characterized by comprising the following steps:
step S1, conveying the prefabricated steel pipe pile, pile top distribution beams, bailey beams and bridge decks to a construction site;
s2, carrying out sinking construction of the steel pipe pile after measuring and confirming the position of the steel pipe pile, and immediately carrying out construction of a coupling system among the steel pipe piles at each pier position and a pile top distribution beam after the construction of the steel pipe pile at each pier position is completed; hoisting the bailey beam to the corresponding distribution beam, and fixing the bailey beam;
step S3, conveying the bridge deck to the site through a flat car, hoisting the bridge deck to the position above the Bailey beam, and installing guardrails immediately after the bridge deck is installed;
s4, repeating the steps S2-S3, and constructing pier by pier along the design drawing until the construction of trestle and drilling platform at all pier positions is completed;
the trestle comprises a main trestle and a branch trestle, wherein the pier foundation of each pier position comprises a first bearing platform and a second bearing platform which are mutually separated, the trestle and the drilling platform are divided into a plurality of areas, and construction is sequentially carried out on each area;
setting a bridge abutment on one side of a river channel, excavating after setting out a foundation pit excavation boundary line of the bridge abutment, placing prefabricated steel bars into the river channel after excavation, and pouring the bridge abutment, wherein a main trestle is arranged on one side close to the first bearing platform;
the supporting bridge of the side, close to the main trestle, of the first bearing platform is a first area A;
the side of the second bearing platform, which is close to the main trestle, is provided with a trestle as a second area A;
a drilling platform corresponding to the periphery of the first bearing platform, and a trestle between the two bearing platforms and close to the first bearing platform are a third area A;
the trestle at one side of the first bearing platform, which is far away from the second bearing platform, is a fourth area A;
the supporting bridge of one side, far away from the main supporting bridge, of the first bearing platform and the second bearing platform is a fifth area A;
the drilling platform corresponding to the second bearing platform and the supporting trestle corresponding to the two sides of the second bearing platform are a sixth area A;
sequentially constructing a first area A and a second area A, and constructing a fourth area A while constructing the second area A;
constructing a third area A after the construction of the second area A is completed, constructing a fifth area A after the construction of the fourth area A is completed, and constructing a sixth area A after the construction of the fifth area A is completed;
after construction of trestle and drilling platform corresponding to the pier position is completed, sinking construction of steel pile casing corresponding to the pier position is performed;
the main trestle is connected with the river levee through a trestle slope, and is arranged on one side close to the first bearing platform on the pier position close to one side of the trestle slope;
wherein the landing stage slope is a first area B,
the supporting trestle of the side, far away from the second bearing platform, of the main trestle is a second area B;
the drilling platforms corresponding to the two bearing platforms, the supporting trestle between the two bearing platforms and the supporting trestle on one side of the second bearing platform far away from the first bearing platform are a third area B;
the supporting trestle of one side of the two bearing platforms, which is close to the main trestle, is a fourth area B;
the supporting trestle of one side of the two bearing platforms, which is far away from the main trestle, is a fifth area B;
simultaneously constructing a first area B and a second area B, constructing a third area B after the construction of the steel pipe pile of the second area B is completed, and constructing a fifth area B after the construction of the bridge deck of the second area B is completed;
after the construction of the steel pipe pile in the third area B is completed, carrying out the construction of the fourth area B;
and after the construction of the fourth area B is completed, the sinking construction of the steel pile casing corresponding to the pier position can be carried out.
2. The deep water foundation trestle and drilling platform construction method according to claim 1, characterized in that in step S2, pile top distribution beams are transported to the site after being manufactured, the pile top distribution beams are placed into notches on steel pipe piles through cantilever assembly guide frame platform operation, and brackets are arranged and welded on the distribution beams and the steel pipe piles; and (3) manufacturing a connection system after measuring and lofting the connection positions on the steel pipe piles, wherein the connection system between two adjacent steel pipe piles comprises two horizontal rods longitudinally distributed at intervals and inclined rods crossly distributed between the two horizontal rods, welding horizontal channel steel firstly, and welding the inclined rods after the horizontal channel steel is welded and fixed.
3. The deep water foundation trestle and drilling platform construction method according to claim 1, characterized in that in step S3, after finishing the bridge deck processing, the bridge deck is lifted to a flat car, the bridge deck is overlapped in a mode of 'one positive side and one negative side', when the bridge deck is installed, a female head is longitudinally connected with the installed bridge deck, after the bridge deck is installed in place, the bridge deck is fixed through a U bolt and a pressing plate core, the block length of the bridge deck is designed according to the bridge deck width, and the width is designed according to the beam spacing above the bailey beam.
4. The deep water foundation trestle and drilling platform construction method according to claim 1, characterized in that in step S2, the bailey beam is preassembled, the bailey frame erection position is determined by measuring and lofting on the steel pipe pile, the bailey beam to be installed is lifted and then placed behind the assembled bailey beam, and the bailey beam extends along a straight line.
5. The deep water foundation trestle and drilling platform construction method according to claim 1, characterized in that the construction method further comprises step S5, after the construction is completed, the bridge deck system, the beret beams, the distribution beams and the coupling system are removed in turn in reverse order of installation, and the steel pipe piles are removed by a vibrating hammer in cooperation with underwater cutting or blasting.
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| CN112144408A (en) * | 2020-09-22 | 2020-12-29 | 中交一公局集团有限公司 | Construction method for building assembled trestle |
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| JPH08209652A (en) * | 1995-02-06 | 1996-08-13 | Taisei Corp | Construction method for pier |
| JPH08326018A (en) * | 1995-05-31 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | Method of pier preparation construction by method of all casing construction |
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