CN114908673A - Construction method of deepwater foundation trestle and drilling platform - Google Patents
Construction method of deepwater foundation trestle and drilling platform Download PDFInfo
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- CN114908673A CN114908673A CN202210531349.2A CN202210531349A CN114908673A CN 114908673 A CN114908673 A CN 114908673A CN 202210531349 A CN202210531349 A CN 202210531349A CN 114908673 A CN114908673 A CN 114908673A
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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
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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
- 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 invention provides a construction method of a deepwater foundation trestle and a drilling platform, which comprises the following steps: step S1, transporting the preprocessed workpiece to a construction site; step S2, immediately performing the construction of the connection system among the pier position steel pipe piles and the construction of the pile top distribution beam after the construction of the steel pipe pile at each pier position is completed; step S3, transporting the bridge deck to the site through a flat car, hoisting the bridge deck to the position above the Bailey beam, and installing a guardrail 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 the trestle and the drilling platform at all the pier positions is completed. The steel pipe piles, the pile top distribution beams, the Bailey beams and the bridge decks are preprocessed in a processing factory in advance and then transported to a construction site, so that factory and standard operation of trestle construction is realized, the construction is not influenced by weather and site environment, the trestle engineering is speeded up and standardized, the construction speed is greatly improved, and the construction environment is improved.
Description
Technical Field
The invention belongs to the technical field of bridge engineering construction, and particularly relates to a construction method of a deepwater foundation trestle and a drilling platform.
Background
In the modern bridge construction process, the steel trestle has become an indispensable appurtenance in the bridge construction process to satisfy the transportation demand of all kinds of construction resources such as people, timber, machine. The trestle not only needs to bear various construction loads, but also meets the requirements of safety, economy and material universality, the trestle which is often required to be built across rivers and sea bridges is longer, the input manpower and material resources are more, and the construction speed of the trestle and a drilling platform is directly influenced.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a construction method of a deepwater foundation trestle and a drilling platform.
In order to achieve the above purpose, the invention provides the following technical scheme:
a construction method of a deepwater foundation trestle and a drilling platform comprises the following steps:
step S1, transporting the preprocessed steel pipe piles, the pile top distribution beams, the Bailey beams and the bridge decks to a construction site;
step S2, after the steel pipe pile position is measured and confirmed, steel pipe pile sinking construction is carried out, and after the steel pipe pile construction at each pier position is finished, the construction of a connection system among the steel pipe piles at the pier position and a pile top distribution beam is immediately carried out; hoisting the Bailey beams to the corresponding distribution beams, and fixing the Bailey beams;
step S3, the bridge deck is transported to the site through a flat car and then hoisted to the position above the Bailey beam, and the guard rails 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 the trestle and the drilling platform at all the pier positions is completed.
Preferably, the trestle comprises a main trestle and a support 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 sequentially carried out on each area.
Preferably, construction is simultaneously carried out on two sides of the river channel, an abutment is arranged on one side of the river channel, excavation is carried out after lofting of an excavation side line of an abutment foundation pit is carried out, prefabricated steel bars are placed in the foundation pit after excavation is finished, and the abutment is poured; on 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;
the main trestle and the support trestle on one side of the first bearing platform, which is close to the main trestle, are a first area A;
a side trestle of the second bearing platform close to the main trestle is a second area A;
a drilling platform corresponding to the periphery of the first bearing platform, and a support trestle between the two bearing platforms and close to the first bearing platform are third areas A;
a supporting trestle on one side of the first bearing platform, which is far away from the second bearing platform, is a fourth area A;
a trestle on one sides of the first bearing platform and the second bearing platform, which are far away from the main trestle, is a fifth area A;
a drilling platform corresponding to the second bearing platform and a trestle corresponding to two sides of the second bearing platform are sixth areas A;
the construction of the first area A and the second area A is carried out in sequence, and the construction of the fourth area A is carried out while the construction of the second area A is carried out;
and after the construction of the second area A is finished, the construction of the third area A is carried out, after the construction of the fourth area A is finished, the construction of the fifth area A is carried out, and after the construction of the fifth area A is finished, the construction of the sixth area A is carried out.
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 bank through a trestle slope, and the main trestle is arranged on one side close to the first bearing platform on a pier position close to one side of the trestle slope;
wherein, the landing stage slope is a first area B,
the main trestle and the trestle on one side of the first bearing platform far away from the second bearing platform are second areas B;
a drilling platform corresponding to the two bearing platforms, a supporting trestle between the two bearing platforms and a supporting trestle on one side of the second bearing platform far away from the first bearing platform are third areas B;
a support trestle on one side of the two bearing platforms close to the main trestle is a fourth area B;
a support trestle on 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 piles of the second area B is finished, and constructing a fifth area B after the construction of the bridge deck of the second area B is finished;
and after the construction of the steel pipe pile in the third area B is finished, constructing the fourth area B.
Preferably, the steel casing sinking construction corresponding to the pier position can be carried out after the construction of the fourth area B is completed.
Preferably, in step S2, the pile top distribution beam is transported to the site after being manufactured, the pile top distribution beam is placed into the notch on the steel pipe pile through the operation of the cantilever assembly guide frame platform, and the corbel is welded on the distribution beam and the steel pipe pile; and (3) after the measurement and lofting of the connection position are carried out on the steel pipe piles, a connection system is manufactured, the connection system between two adjacent steel pipe piles comprises two horizontal rods which are longitudinally distributed at intervals and an inclined rod which is crossly distributed between the two horizontal rods, horizontal channel steel is firstly welded, and the inclined rod is welded after the horizontal channel steel is welded and fixed.
Preferably, in step S3, the deck slab is lifted to a flat car after being processed, the deck slabs are stacked in a "one-to-one" manner, the female end is longitudinally connected with the installed deck slab when the deck slab is installed, the deck slab is fixed by a U bolt and a press plate core after being installed in place, the block length of the deck slab is designed according to the width of the deck of the trestle, and the width is designed according to the distance between beams above the beret.
Preferably, in step S2, the beret beams are pre-assembled, measurement and lofting are performed on the steel pipe piles to determine the erection position of the beret frame, and the beret beam to be installed is lifted and placed behind the assembled beret beam, so that the beret 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 beret beam, the distribution beam and the bracing system are dismantled in sequence in reverse order of installation, and the steel pipe pile is dismantled by matching of a vibration hammer and underwater cutting or blasting.
Has the advantages that: the steel pipe piles, the pile top distribution beams, the Bailey beams and the bridge decks are preprocessed in a processing factory in advance and then transported to a construction site, so that factory and standard operation of trestle construction is realized, the construction is not influenced by weather and site environment, the trestle engineering is speeded up and standardized, the construction speed is greatly improved, and the construction environment is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic diagram illustrating the division of regions corresponding to abutments proximate to abutments in an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating the division of the area corresponding to the pier position close to the ramp of the trestle in the embodiment of the present invention.
In the figure: 1. a first bearing platform; 2. a second 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 technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1-2, a construction method of a deep water foundation trestle and a drilling platform comprises the following steps: step S1, leveling a trestle processing site and a road, and transporting the preprocessed steel pipe piles, pile top distribution beams, Bailey beams and bridge decks to a construction site; the factory and standard operation of trestle construction is realized, and the rapidity and the standardization of trestle engineering are ensured; step S2, after the steel pipe pile position is measured and confirmed, sinking construction of the steel pipe pile is carried out, the steel pipe pile driving equipment mainly comprises a crawler crane and a vibration driving hammer, and after the construction of the steel pipe pile at each pier position is finished, construction of a connection system among the steel pipe piles at the pier position and construction of a pile top distribution beam are immediately carried out; hoisting the Bailey beams to the corresponding distribution beams, and fixing the Bailey beams; step S3, the bridge deck comprises a plurality of blocks, the bridge deck is transported to the site through a flat car and then hoisted to the position above the Bailey beam, and the guard rails 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 the trestle and the drilling platform at all the pier positions is completed.
The steel pipe pile is transported to a field processing workshop by a 12m spiral pipe, is lengthened to a designed length on the field from the small mileage side according to the pier position according to the design, the joint is welded by adopting a groove, and then the reinforcing plates are welded at the top opening and the bottom opening. And (4) processing the pile top distribution beam according to the drawing size.
Assembling the Bailey sheets into a standard part on a rear single sheet, and assembling 2 Bailey sheets into a standard group. The bridge deck is made of 10mm steel plates.
In another optional embodiment, the construction is simultaneously carried out on two sides of the river channel, the construction efficiency can be greatly improved, the trestle comprises a main trestle and a support trestle, the 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 the drilling platform are divided into a plurality of areas, the construction is sequentially carried out on the areas, the construction is carried out on the trestle and the drilling platform corresponding to each pier position in a sub-area mode, the construction sequence can be optimized, and the construction efficiency is improved.
In another optional embodiment, an abutment is arranged at one side of the river channel, the abutment adopts an enlarged foundation filled outside the embankment body and is connected with a temporary road at the back water side of the embankment body through a filling temporary road, firstly, the excavation side line of an abutment foundation pit is laid out and then excavated, the bearing capacity of the pit bottom is tested after the excavation is finished, and prefabricated reinforcing steel bars are placed into a designated position and then poured; in the pier position close to one side of the abutment, a main trestle is arranged at one side close to the first bearing platform 1 and is correspondingly connected with the abutment, wherein the main trestle and a support trestle at one side of the first bearing platform 1 close to the main trestle are first areas A3; a side trestle of the second bearing platform 2 close to the main trestle is a second area A4; a third area A6 is a drilling platform corresponding to the periphery of the first bearing platform 1, and a support trestle between the two bearing platforms and close to the first bearing platform 1; a support bridge on one side of the first bearing platform 1, which is far away from the second bearing platform 2, is a fourth area A7; a fifth area A8 is formed on the side, away from the main trestle, of the first bearing platform 1 and the second bearing platform 2; a drilling platform corresponding to the second bearing platform 2 and a support trestle corresponding to two sides of the second bearing platform 2 are sixth areas A5; the construction of the first area A3 and the second area A4 is carried out in sequence, and the construction of the fourth area A7 is carried out simultaneously with the construction of the second area A4; after the construction of the second area A4 is completed, the construction of a third area A6 is carried out, after the construction of a fourth area A7 is completed, the construction of a fifth area A8 is carried out, and after the construction of the fifth area A8 is completed, the construction of a sixth area A5 is carried out. In the embodiment, each area is constructed by adopting a fishing method, and the areas are 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 at each pier is sequentially performed by the above-mentioned method. After the construction of the trestle and the drilling platform corresponding to each pier position is completed, the steel casing sinking construction corresponding to the pier position is carried out, so that the pier foundation of the current pier position and the trestle and the drilling platform of the subsequent pier position can be simultaneously constructed, and the construction efficiency is improved.
In another optional embodiment, a landing stage slope is arranged on the river channel, the main landing stage is connected with the river bank through the landing stage slope, so that equipment vehicles can reach the main landing stage from the access road, and the main landing stage is arranged on one side close to the first bearing platform 1; the slope of the trestle is a first area B12, and the main trestle and the support trestle on the side of the first bearing platform 1 far away from the second bearing platform 2 are second areas B9; a drilling platform corresponding to the two bearing platforms, a supporting bridge between the two bearing platforms, and a supporting bridge on one side of the second bearing platform 2 far away from the first bearing platform 1 are third areas B13; a support trestle at one side of the two bearing platforms close to the main trestle is a fourth area B11; a support trestle at one side of the two bearing platforms, which is far away from the main trestle, is a fifth area B10; simultaneously constructing a first region B12 and a second region B9, constructing a third region B13 after the construction of the steel pipe pile of the second region B9 is finished, and constructing a fifth region B10 after the construction of the bridge deck of the second region B9 is finished; and after the construction of the steel pipe pile in the third area B13 is finished, constructing a fourth area B11. In the embodiment, the first area B12 and the fifth area B10 are constructed by a fishing method, the second area B9, the third area B13 and the fourth area B11 are paved on the bridge floor by piling in a floating crane method and matching with a fishing method, and the areas are crossed in time and space, so that the construction efficiency is effectively improved.
In this embodiment, after the fourth region B11 is constructed, the steel casing corresponding to the pier position may be sunk. Pier foundation construction can be carried out while trestle and drilling platform construction, construction efficiency has been improved.
In another optional embodiment, the application provides two construction steps of trestle and drilling platform, two methods are respectively adopted on two sides of the river channel for opposite construction, and closure is carried out in the middle of the river channel.
Or the two construction methods are constructed in opposite directions on the two banks of the river channel by adopting the same method, closure is carried out in the middle of the river channel, the two construction methods are respectively aimed at a trestle with a bridge abutment and a trestle slope, and the two methods can be independently selected by people in the field according to the river channel environment.
In another optional embodiment, in step S2, after the pile top distribution beam is manufactured, the pile top distribution beam is transported to the site, and is hoisted in place by a two-point hoisting manner using a crawler crane, the top of the cantilever assembly support is measured, the design elevation of the steel pipe top is found out by using the measurement as a reference surface, an operator performs gas cutting on the pile top to form a notch according to the design size, the size of the notch is 29cm in width and 25cm in depth, and the bottom surface is ensured to be flat, the pile top distribution beam is placed into the notch on the steel pipe pile through the operation of the cantilever assembly guide frame platform, and the bracket is welded on the distribution beam and the steel pipe pile; the production of the connection system is carried out after the measurement lofting of the connection position is carried out on the steel pipe piles, the operator measures the blanking of the clear distance between the steel pipe piles, the connection system between two adjacent steel pipe piles comprises two horizontal rods which are longitudinally distributed at intervals and inclined rods which are crossly distributed between the two horizontal rods, the horizontal channel steel is firstly welded, the inclined rods are welded after the horizontal channel steel is welded and fixed, the connection system carries out blanking production according to actual measurement, the precision of the connection system is guaranteed, the installation difficulty is reduced, and the fixing effect is improved.
In another alternative embodiment, in step S3, the bridge deck system is processed using post-standardized, factory-made block fabrication. And after the bridge deck is processed, the bridge deck is lifted to a flat car, the bridge deck is superposed in a positive-negative mode, then is reinforced by steel wire ropes and is transported to a site for lifting. The installation of the bridge deck slab is vertically connected with the female end and the installed bridge deck slab, after the bridge deck slab is installed in place, the bridge deck slab is fixed through the U bolts and the pressing plate core, and when the bridge deck slab is transversely placed, one Bailey sheet corresponds to each U-shaped bolt under the pressing beam, so that the U-shaped bolts are conveniently installed. After the bridge deck plate is installed in place, the U-shaped bolt and the pressing plate are installed manually, and the nut needs to be fastened by a wrench, so that firmness and reliability are ensured. The block 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 beams above the Bailey beam.
In another optional embodiment, in step S2, the bailey beams are pre-assembled, measurement and lofting are performed on the steel pipe piles to determine the erection position of the bailey truss, the bailey beams to be installed are lifted and placed behind the installed bailey beams, the bailey beams extend along a straight line, every two (three) pieces of the bailey beams are divided into one group, one group of bailey beams are installed on a flat car or a crawler crane, the bailey beams are firmly bound on the cross beam after being accurately positioned, then a limiter is welded, the other group of bailey beams are installed, and are connected with the installed group of bailey beams through a scissor brace, and so on, the installation of the entire span bailey beam is completed.
In another alternative embodiment, the construction method further comprises step S5, after the construction is completed, the bridge deck system, the beret beam, the distribution beam and the bracing system are removed in reverse order of installation, and the steel pipe pile is removed by using a vibration hammer in combination with underwater cutting or blasting. The deck system is dismantled in reverse order of installation. Firstly, cutting off the trestle railings, then cutting off the small connecting steel plates between the bridge decks, and hoisting the cut-off bridge decks nearby. The Bailey beams are hoisted in groups, each span is divided into four groups, and each group comprises 2 trusses. During construction, the support frames between every two trusses are firstly dismantled, then the pin shafts between two spans are dismantled, and then the whole body is dismantled by using a crawler crane or a floating crane. The pile top distribution beam dismantling should follow the sequence from top to bottom: the cutting distribution beam is connected with the pile head, the longitudinal and transverse distribution beam integral units are integrally dismantled to a transport ship through a crawler crane or a floating crane, and the longitudinal and transverse distribution beam integral units are disassembled on the transport ship to be divided into single-component distribution beam components. For the connection system which can be detached and fixedly connected with the steel pipe pile, the connection system reversely hangs the pile top, the fixed part is detached, and the connection system is integrally detached to the flat car by using the crawler crane. For the coupling system which can not be removed from the steel pipe pile, the coupling system is reversely hung on the pile top, the coupling system is directly cut off at the position of the steel pipe pile or the integral coupling system sleeve (when the coupling system is cut off, the steel pipe pile is protected), and the coupling system is integrally removed to the flat car by using a crawler crane or a floating crane. When the pile is pulled out, because the steel-pipe pile is used for a period of time, the soil body around the pile gradually becomes stable, the friction force of the pile soil is increased, the difficulty of pile pulling is increased, the vibration hammer is arranged for pulling out, and the steel-pipe pile is matched with underwater cutting or blasting to be detached when necessary.
In another optional embodiment, in order to ensure that the main trestle can meet the traffic load of a 200t rotary drilling rig or the passing of two concrete transport vehicles, the total width of the trestle is 8 m. 5 groups of 10 pieces of Bailey beam transverse bridges are intensively arranged at two sides of the Bailey beam transverse bridge. And the end part and the lower chord of each Bailey beam are transversely connected by a support frame. The width of the bridge deck is 8.0m, and the pile top distribution beam is I45a double-spliced I-shaped steel; the longitudinal beam adopts a Bailey beam combined truss; the bottom die distribution beam is made of I20a I-shaped steel (the distance is 300mm), and the distribution beam is connected with the Bailey beam through U-shaped bolts; and laying bridge decks on the tops of the distribution beams. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A construction method of a deepwater foundation trestle and a drilling platform is characterized by comprising the following steps:
step S1, transporting the preprocessed steel pipe piles, the pile top distribution beams, the Bailey beams and the bridge decks to a construction site;
step S2, after the position of the steel pipe pile is determined through measurement, sinking construction of the steel pipe pile is carried out, and after the construction of the steel pipe pile at each pier position is completed, construction of a connection system among the steel pipe piles at the pier position and construction of a pile top distribution beam are immediately carried out; hoisting the Bailey beams to the corresponding distribution beams, and fixing the Bailey beams;
step S3, the bridge deck is transported to the site through a flat car and then hoisted to the position above the Bailey beam, and the guard rails 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 the trestle and the drilling platform at all the pier positions is completed.
2. The deep water foundation trestle and drilling platform construction method according to claim 1, wherein the trestle comprises a main trestle and a support trestle, the pier foundation of each pier 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 the areas are constructed in sequence.
3. The construction method of the deepwater foundation trestle and the drilling platform according to claim 2, wherein an abutment is arranged on one side of a riverway, the excavation is carried out after the layout of an excavation side line of an abutment foundation pit is carried out, prefabricated steel bars are placed and the abutment is poured after the excavation is finished, and a main trestle is arranged on one side close to the first bearing platform;
the main trestle and the support trestle on one side of the first bearing platform, which is close to the main trestle, are a first area A;
a side trestle of the second bearing platform close to the main trestle is a second area A;
a drilling platform corresponding to the periphery of the first bearing platform, and a support trestle between the two bearing platforms and close to the first bearing platform are third areas A;
a supporting bridge on one side of the first bearing platform, which is far away from the second bearing platform, is a fourth area A;
a support trestle on one side of the first bearing platform and the second bearing platform, which is far away from the main trestle, is a fifth area A;
a drilling platform corresponding to the second bearing platform and a trestle corresponding to two sides of the second bearing platform are sixth areas A;
the construction of the first area A and the second area A is carried out in sequence, and the construction of the fourth area A is carried out while the construction of the second area A is carried out;
and after the construction of the second area A is finished, the construction of the third area A is carried out, after the construction of the fourth area A is finished, the construction of the fifth area A is carried out, and after the construction of the fifth area A is finished, the construction of the sixth area A is carried out.
4. The deepwater foundation trestle and drilling platform construction method according to claim 3, wherein the sinking construction of the steel casing corresponding to the pier is carried out after the construction of the trestle and the drilling platform corresponding to the pier is completed.
5. The deepwater foundation trestle and drilling platform construction method according to claim 2, wherein a main trestle is connected with a river bank through a trestle slope, and the main trestle is arranged on one side close to the first bearing platform on an abutment close to one side of the trestle slope;
wherein, the landing stage slope is a first area B,
the main trestle and the support trestle at one side of the first bearing platform far away from the second bearing platform are second areas B;
a drilling platform corresponding to the two bearing platforms, a supporting trestle between the two bearing platforms and a supporting trestle on one side of the second bearing platform far away from the first bearing platform are third areas B;
a support trestle on one side of the two bearing platforms close to the main trestle is a fourth area B;
a support trestle on 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 piles of the second area B is finished, and constructing a fifth area B after the construction of the bridge deck of the second area B is finished;
and after the construction of the steel pipe pile in the third area B is finished, constructing the fourth area B.
6. The construction method of the deep water foundation trestle and the drilling platform as claimed in claim 4, wherein the sinking construction of the steel casing corresponding to the pier position can be performed after the construction of the fourth area B is completed.
7. The construction method of the deep water foundation trestle and the drilling platform according to claim 1, wherein in step S2, the pile top distribution beam is transported to the site after being manufactured, the pile top distribution beam is placed into the notch on the steel pipe pile through the operation of the cantilever assembly guide frame platform, and the bracket is welded on the distribution beam and the steel pipe pile; and (3) after the measurement and lofting of the connection position are carried out on the steel pipe piles, a connection system is manufactured, the connection system between two adjacent steel pipe piles comprises two horizontal rods which are longitudinally distributed at intervals and an inclined rod which is crossly distributed between the two horizontal rods, horizontal channel steel is firstly welded, and the inclined rod is welded after the horizontal channel steel is welded and fixed.
8. The construction method of the deep water foundation trestle and the drilling platform as claimed in claim 1, wherein in step S3, the bridge deck is lifted to a flat car after being processed, the bridge decks are stacked in a 'one-to-one and one-to-one' manner, the female end is longitudinally connected with the mounted bridge deck when the bridge deck is mounted, the bridge deck is fixed in place by U bolts and a press plate 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 beams above the beret beam.
9. The construction method of the deep water foundation trestle and the drilling platform according to claim 1, wherein in step S2, the Bailey beams are pre-assembled, measurement lofting is performed on the steel pipe piles to determine the erection position of the Bailey truss, and the Bailey beams to be installed are lifted and placed behind the installed Bailey beams, so that the Bailey beams extend along a straight line.
10. The construction method of the deep water foundation trestle and the drilling platform as claimed in claim 1, further comprising step S5, wherein after the construction is completed, the bridge deck system, the beret beam, the distribution beam and the coupling system are dismantled in reverse order of installation, and the steel pipe pile is dismantled by the vibration hammer in cooperation with underwater cutting or blasting.
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| CN114908673B (en) | 2023-10-20 |
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