CN113463674A - Recyclable combined steel structure open caisson and construction method thereof - Google Patents
Recyclable combined steel structure open caisson and construction method thereof Download PDFInfo
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- CN113463674A CN113463674A CN202110558210.2A CN202110558210A CN113463674A CN 113463674 A CN113463674 A CN 113463674A CN 202110558210 A CN202110558210 A CN 202110558210A CN 113463674 A CN113463674 A CN 113463674A
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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
- 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
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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Abstract
The invention relates to the technical field of steel structure open caisson, in particular to a recyclable combined steel structure open caisson and a construction method thereof, which comprises four steel corner columns and four well walls which are arranged pairwise and symmetrically, wherein the well walls are arranged between two adjacent steel corner columns, and the four steel corner columns and the four well walls are combined and installed to form the steel structure open caisson, after the non-excavation construction of the pipeline is finished, the connecting piece of the wall of the steel open caisson is dismantled while the earth is backfilled in the open caisson, and finally the steel member is pulled out and recycled on the ground, therefore, the minimum influence and the minimum risk of the construction process on the surrounding environment are ensured, the building envelope structure and the permanent structure are combined into a whole, the economy is good, and the quality is high.
Description
Technical Field
The invention relates to the technical field of steel structure open caisson, in particular to a recyclable combined steel structure open caisson and a construction method thereof.
Background
Underground pipelines (sewage pipes, power main pipes and the like) constructed in a non-excavation mode (pipe jacking, pipe pulling and the like) are required to be provided with working wells. Traditionally, a reinforced concrete open caisson is arranged every 100m or so along a pipeline, the clearance in the reinforced concrete open caisson is 3.5m by 6.0m (or slightly larger), and the well depth is basically more than 6 m.
The reinforced concrete open caisson has the following disadvantages:
1. can not be repeatedly used. The reinforced concrete open caisson only plays a role in the jacking (temporary working condition) process of the pipeline, and after the construction of the jacking pipe is finished, the reinforced concrete open caisson can only be used as an inspection well (permanent working condition) for personnel to maintain the pipeline.
2. The sinking process is difficult to control. Once the reinforced concrete open caisson is poured, the weight is basically stable, and the resistance of the open caisson in the sinking process is changed, so that the sinking stability is difficult to control.
3. The cost is higher, and the construction period is longer. The reinforced concrete open caisson is generally constructed in a layered mode and sinks in a layered mode, and after concrete is poured, the open caisson needs to wait for the section of the open caisson to reach the design strength, so that the construction period of the reinforced concrete open caisson is long, and the influence on the road or the surrounding environment is long. Therefore, it is necessary to provide a recyclable combined type steel structure open caisson and a construction method thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide a recyclable combined steel structure open caisson and a construction method thereof to solve the technical problems.
In order to achieve the purpose, the invention provides the following technical scheme: a recoverable combined steel structure open caisson comprises four steel corner columns and four well walls, wherein the four steel corner columns and the four well walls are arranged in a pairwise symmetry mode, the well walls are installed between every two adjacent steel corner columns, and the four steel corner columns and the four well walls are installed in a combined mode to form the steel structure open caisson;
the cross section of the steel corner column is square, and an angle steel is welded at the joint of the steel corner column and the well wall;
four the wall of a well includes many H shaped steel, multiunit A shaped steel board subassembly and at least a set of combination steel plate spare of taking the through-hole, every group including two A shaped steel boards in the A shaped steel board subassembly, including two combination steel boards, many in the combination steel plate spare H shaped steel sets up between two adjacent steel corner posts, the angle steel is connected with adjacent H shaped steel edge of a wing, adjacent two equally divide between the both ends edge of a wing of H shaped steel and do not be connected through A shaped steel board subassembly or combination steel plate spare.
Preferably, the steel blade foot is further included, the bottom of the steel blade foot is in a wedge shape, the steel blade foot is hollow, an opening is formed in the top of the steel blade foot, a drawknot steel plate is arranged between the side walls of the inner cavity of the steel blade foot, and the steel corner post and the H-shaped steel are inserted into the inner cavity of the steel blade foot and located on the upper portion of the drawknot steel plate.
Preferably, the steel ring beam is further included and is rectangular, and the steel ring beam is sleeved on the steel corner posts and the top of the well wall.
Preferably, the H-shaped steel and the angle steel, the H-shaped steel and the A-shaped steel plate assembly and the H-shaped steel and the combined steel plate are bolted and fixed through a plurality of bolt assemblies;
the bolt assembly comprises two nuts and a steel screw;
the two nuts are respectively welded on one side face, far away from each other, of the angle steel, and the steel screw penetrates through the angle steel and the H-shaped steel and is bolted with the nuts;
the two nuts are respectively welded on one side face, far away from each other, of the two A-shaped steel plates, and the steel screw penetrates through the H-shaped steel and the inner and outer A-shaped steel plates and is bolted with the nuts;
the two nuts are respectively welded on one side face, far away from each other, of the two combined steel plates, and the steel screw penetrates through the H-shaped steel and the inner and outer combined steel plates and is bolted with the nuts.
Preferably, the combination steel sheet includes a slice first B shaped steel board, two C shaped steel boards and a slice second B shaped steel board, two the semicircle orifice of mutually supporting all is seted up on the C shaped steel board, down be first B shaped steel board, two C shaped steel boards and second B shaped steel board from last in proper order during combination steel sheet aggregate erection, and the semicircle orifice of two C shaped steel boards sets up relatively and forms the round hole.
A construction method of a recyclable combined type steel structure open caisson comprises the following steps:
s1: welding the steel blade foot into a whole at the well body position, and filling sand and stones into the cavity of the steel blade foot;
s2: respectively inserting the steel angle column and the H-shaped steel into the steel blade foot, and then bolting the A-shaped steel plate, the first B-shaped steel plate, the C-shaped steel plate and the second steel plate with steel screws to the steel angle column and the H-shaped steel respectively to form a well wall;
s3: buckling the segmented steel ring beam on the steel corner post and the well wall, and bolting the steel ring beam into an integral steel ring beam;
s4: sinking the well, digging soil to the bottom surface of the bottom sealing concrete by using mechanical equipment;
s5: pouring bottom sealing concrete and pouring a reinforced concrete bottom plate;
s6: carrying out trenchless pipeline construction operations such as pipe jacking, pipe pulling and the like on the reinforced concrete bottom plate;
s7: after the pipeline construction operation is finished, removing the construction machinery in the well, backfilling earthwork in the well, and dismantling the steel screw rod from bottom to top along with the backfilling of the earthwork;
s8: and (4) removing the steel ring beam after the earthwork backfilling approaches to the ground, pulling out the A-shaped steel plate, the first B-shaped steel plate, the C-shaped steel plate above the hole and the H-shaped steel by using mechanical equipment, and then removing the steel corner post to finish the removal.
Preferably, in step S1, before welding the steel blade, the floor of the well body is leveled, and the underground obstacle at the steel blade foot of the open caisson is cleaned.
Preferably, the step S5 may further include: the steel plate is directly placed on the bottom sealing concrete to be used as a steel bottom plate.
Preferably, the open caisson operation in the step S4 can be performed in a drainage sinking mode or a non-drainage sinking mode according to the specific geological conditions of the field of view.
Preferably, the step S7 further includes: and constructing an inspection well required by the hydraulic engineering specialty.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the concept of combined assembly, steel structure open caisson components are manufactured and processed in factories, a rigid structure is formed by ground assembly on a construction site, the open caisson is sunk in place according to the conventional open caisson construction technology, after the trenchless construction of pipelines is finished, the connecting piece of the wall of the steel open caisson is dismantled while earth is backfilled in the open caisson, and finally the steel components are pulled out and recycled on the ground, thereby ensuring that the construction process has the minimum influence on the surrounding environment and the minimum risk, and the enclosure structure and the permanent structure are integrated into a whole, thereby having good economy and high quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 is a schematic view of a portion of the structure of FIG. 1;
FIG. 3 is a schematic view of the structure of the well wall with through holes in the invention;
FIG. 4 is a schematic view of a borehole wall splitting element according to the present invention;
FIG. 5 is a schematic structural view of a steel corner post according to the present invention;
FIG. 6 is a schematic structural view of the crown beam inserted into a steel corner post or a well wall in the invention;
FIG. 7 is a schematic structural diagram of the steel angle column or well wall inserted with the steel blade foot in the invention;
FIG. 8 is a flow chart of the construction method of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a steel corner post; 11. angle steel; 2. a well wall; 21. h-shaped steel; 22. a type A steel plate; 23. combining steel plates; 231. a first B-type steel plate; 232. c-shaped steel plates; 233. a second B-type steel plate; 3. a steel blade foot; 31. drawing the steel plate; 4. a steel ring beam; 5. a bolt assembly; 51. a nut; 52. a steel screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, the present invention provides a technical solution: a recoverable combined steel structure open caisson comprises four steel corner columns 1 and four well walls 2 which are arranged in a pairwise symmetry mode, wherein the well walls 2 are installed between every two adjacent steel corner columns 1, and the four steel corner columns 1 and the four well walls 2 are installed in a combined mode to form the steel structure open caisson;
the cross section of the steel angle column 1 is square, and an angle steel 11 is welded at the joint of the steel angle column 1 and the well wall 2;
four well walls 2 include many H shaped steel 21, the combination steel sheet spare of multiunit A shaped steel board subassembly and at least a set of band-pass hole, include two A shaped steel 22 in every A shaped steel subassembly of group, include two combination steel sheet 23 in the combination steel sheet spare, many H shaped steel 21 set up between two adjacent steel corner posts 1, angle steel 11 is connected with adjacent H shaped steel 21 edge of a wing, equally divide between two adjacent H shaped steel 21's the both ends edge of a wing and do not be connected through A shaped steel board subassembly or combination steel sheet spare.
Specifically, still include steel sword foot 3, and 3 bottoms of steel sword foot are the wedge shape, and 3 inside hollows of steel sword foot and top are equipped with the opening, are provided with drawknot steel sheet 31 between 3 inner chamber lateral walls of steel sword foot, and steel angle post 1 and H shaped steel 21 are all inserted and are established 3 inner chambers of steel sword foot and are located drawknot steel sheet 31 upper portion.
Specifically, still include steel ring roof beam 4, and steel ring roof beam 4 is rectangle shape, and steel ring roof beam 4 cover is established at steel corner post 1 and wall of a well 2 top.
Specifically, the H-shaped steel 21 and the angle steel 11, the H-shaped steel 21 and the A-shaped steel plate assembly, and the H-shaped steel 21 and the combined steel plate 23 are bolted and fixed through a plurality of bolt assemblies 5;
the bolt assembly 5 comprises two nuts 51 and a steel screw 52;
the two nuts 51 are respectively welded on the side surfaces, far away from each other, of the angle steel 11, and the steel screw 52 penetrates through the angle steel 11 and the H-shaped steel 21 and is bolted with the nuts 51;
the two nuts 51 are respectively welded on one side surfaces of the two A-shaped steel plates 22 which are far away from each other, and the steel screw 52 penetrates through the H-shaped steel 21 and the inner and outer A-shaped steel plates 22 and is bolted with the nuts 51;
two nuts 51 are welded on the side surfaces of the two combined steel plates 23 away from each other, and a steel screw 52 penetrates through the H-shaped steel 21 and the inner and outer combined steel plates 23 and is bolted with the nuts.
Specifically, combination steel sheet 23 includes a slice first B shaped steel plate 231, two C shaped steel plates 232 and a slice second B shaped steel plate 233, all sets up the semicircle orifice of mutually supporting on two C shaped steel plates 232, and last down being first B shaped steel plate 231, two C shaped steel plates 232 and second B shaped steel plate 233 in proper order during combination installation of combination steel sheet 23, and the semicircle orifice of two C shaped steel plates 232 sets up relatively and forms the round hole.
A construction method of a recyclable combined steel structure open caisson comprises the following steps:
s1: welding the steel blade 3 into a whole at the well body position, and filling sand and stones into the cavity of the steel blade 3;
s2: respectively inserting the steel corner post 1 and the H-shaped steel 21 into the steel blade foot 3, and then bolting the A-shaped steel plate 22, the first B-shaped steel plate 231, the C-shaped steel plate 232 and the second steel plate 233 with the steel corner post 1 and the H-shaped steel 21 by using a steel screw 52 to form a well wall 2;
s3: buckling the segmented steel ring beam 4 on the steel corner post 1 and the well wall 2, and bolting the steel ring beam to form an integral steel ring beam;
s4: sinking the well, digging soil to the bottom surface of the bottom sealing concrete by using mechanical equipment;
s5: pouring bottom sealing concrete and pouring a reinforced concrete bottom plate;
s6: carrying out trenchless pipeline construction operations such as pipe jacking, pipe pulling and the like on the reinforced concrete bottom plate;
s7: after the pipeline construction operation is finished, removing the construction machinery in the well, backfilling earthwork in the well, and dismantling the steel screw rod from bottom to top along with the backfilling of the earthwork;
s8: and (3) removing the steel ring beam 4 after the earth backfill is close to the ground, pulling out the A-shaped steel plate 22, the first B-shaped steel plate 231, the C-shaped steel plate 232 above the hole and the H-shaped steel 21 by using mechanical equipment, and then pulling out the steel corner post 1 to finish the removal.
Specifically, in step S1, before welding the steel blade 3, the floor of the well body is leveled, and the underground obstacle at the steel blade 3 of the open caisson is cleaned.
Specifically, step S5 may also be: the steel plate is directly placed on the bottom sealing concrete to be used as a steel bottom plate.
Specifically, the open caisson operation in step S4 may be performed in a drainage sinking or non-drainage sinking manner depending on the specific geological conditions of the field of view.
Specifically, step S7 further includes: and constructing an inspection well required by the hydraulic engineering specialty.
Example (b):
1) processing a steel member in a factory according to design requirements, wherein the steel member comprises a segmented steel blade foot 3, a segmented steel ring beam 4, a steel corner post 1, an A-shaped steel plate 22, a first B-shaped steel plate 231, a C-shaped steel plate 232, a second B-shaped steel plate 233 and H-shaped steel 21, and conveying the processed steel member to a construction site, wherein when the steel member is processed, the width of the A-shaped steel plate 22 takes 100mm as a modulus, and the height takes 300mm as a modulus; the arc radius of the C-shaped steel plate 232 meets the requirement of the outer radius of the pipeline to be constructed and is 100mm, the size from the arc to the upper edge and the two side edges of the plate is not more than 200mm, and the length and the width of the C-shaped steel plate take 100mm as modulus; the first B-shaped steel plate 231 and the second B-shaped steel plate 233 have the same width as the C-shaped steel plate 232 and the same height as the C-shaped steel plate 232, and the modulus of 100 mm; the thicknesses of the plates are consistent, and 2mm is taken as a modulus and is not less than 8 mm; the height of the cross section of the H-shaped steel 21 takes 100mm as a modulus and is not less than 500mm, and the height of the H-shaped steel 21 takes 300mm as a modulus; the height of the cross section of the H-shaped steel 21 is the same as that of the cross section of the steel corner post 1, and the height of the H-shaped steel 21 is the same as that of the steel corner post 1; the top elevation of the steel open caisson is controlled to be close to the ground elevation or slightly higher than the ground elevation. The H-shaped steel and the steel angle column in the well wall are at the same height, the top elevations of the A-shaped steel plate and the B-shaped steel plate which are bolted on the H-shaped steel are the same as the lower end elevations of the steel plates at two sides of the steel ring beam, and the top elevations of the H-shaped steel and the steel angle column are the same as the bottom elevations of the steel plates at the lower side of the steel ring beam;
taking a conventional push pipe working well with the plane size of 3.5m by 6.0m as an example, the length of a long-side well wall without opening a hole is 6.0m, and the length of a short-side well wall with opening a hole is 3.5 m. For the long-side well wall, H-shaped steel 21 is uniformly distributed to configure an A-shaped steel plate 22; for the short-side well wall, the size of a circular hole of the C-shaped steel plate 232 is controlled by increasing the outer diameter of a pipeline to be constructed by 200mm, not less than 1H-shaped steel 21 is respectively distributed on two sides of the circular hole, the A-shaped steel plate 22 is configured, and the widths of the A-shaped steel plate 22 and the C-shaped steel plate 232 are preferably coordinated and meet the modulus.
2) Leveling the floor of the well body, and cleaning underground obstacles at the steel blade foot 3;
3) welding the segmented steel blade legs 3 conveyed from a factory into a whole at the well body position, and filling sand and stones into the cavities of the steel blade legs 3;
4) inserting the steel corner post 1 and the H-shaped steel 21 into the steel blade foot 3, bolting the angle steel 11 of the steel corner post 1 with the adjacent H-shaped steel 21 by using the steel screw 52, and bolting the A-shaped steel plate 22, the first B-shaped steel plate 231 (if needed), the C-shaped steel plate 232 (if needed) and the second B-shaped steel plate 233 (if needed) with the two adjacent groups of H-shaped steel 21 by using the steel screw 52 respectively to form the well wall 2 (the angle steel 11 of the steel corner post 1 can also be directly bolted with the A-shaped steel plate 22);
5) according to the sinking construction requirement, filling sand, stone or water into the inner part or the whole of the steel open caisson wall cavity; bricks are filled in the round holes surrounded by the C-shaped steel plates 232;
6) buckling the segmented steel ring beam 4 on the steel corner post 1 and the well wall 2, and then bolting the steel ring beam to form an integral steel ring beam;
7) and (5) performing open caisson operation, and digging soil to the bottom sealing concrete bottom surface by using mechanical equipment. The open caisson operation can adopt drainage sinking and non-drainage sinking modes according to specific geological conditions of a field of view, and the soil penetration depth of the steel open caisson is based on the standard that the position of a C-shaped steel plate 232 is matched with the elevation of a pipeline to be constructed; if the two directions of the open caisson need pipeline construction operation, controlling the buried depth of the open caisson by the elevation of the pipeline with deeper buried depth;
8) pouring the bottom sealing concrete, pouring a reinforced concrete bottom plate according to needs, or directly placing a steel plate on the bottom sealing concrete to form a steel bottom plate;
9) carrying out pipe jacking, pipe pulling and other trenchless pipeline construction operations on the reinforced concrete bottom plate (or the steel bottom plate);
10) after the pipeline construction operation is finished, removing the construction machinery and the steel bottom plate (if any) in the well, backfilling earthwork in the well, and building an inspection well required by the hydraulic engineering specialty if necessary; dismantling the steel screw 52 from bottom to top along with the earth backfilling;
11) and removing the steel ring beam 4 after the earthwork backfill is close to the ground, pulling out the A-shaped steel plate 22, the first B-shaped steel plate 231, the C-shaped steel plate 232 above the opening and the H-shaped steel 21 on the inner side and the outer side of the well wall 2 by using mechanical equipment, and then pulling out the steel corner post 1 to finish the construction.
The invention adopts the concept of combined assembly, steel structure open caisson components are manufactured and processed in factories, a rigid structure is formed by ground assembly on a construction site, the open caisson is sunk in place according to the conventional open caisson construction technology, after the trenchless construction of pipelines is finished, the connecting piece of the wall of the steel open caisson is dismantled while earth is backfilled in the open caisson, and finally the steel components are pulled out and recycled on the ground, thereby ensuring that the construction process has the minimum influence on the surrounding environment and the minimum risk, and the enclosure structure and the permanent structure are integrated into a whole, thereby having good economy and high quality.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (10)
1. The utility model provides a recoverable combined steel construction open caisson which characterized in that: the open caisson comprises four steel corner columns (1) and four well walls (2), wherein the four steel corner columns (1) and the four well walls (2) are arranged pairwise and symmetrically, the well walls (2) are installed between every two adjacent steel corner columns (1), and the four steel corner columns (1) and the four well walls (2) are assembled to form the steel structure open caisson;
the cross section of the steel corner post (1) is square, and an angle steel (11) is welded at the joint of the steel corner post (1) and the well wall (2);
four wall of a well (2) includes many H shaped steel (21), multiunit A shaped steel board subassembly and at least a set of combination steel plate spare of taking the through-hole, every group including two A shaped steel board (22) in the A shaped steel board subassembly, including two combination steel board (23), many in the combination steel plate spare H shaped steel (21) set up between two adjacent steel corner post (1), angle steel (11) are connected with adjacent H shaped steel (21) edge of a wing, adjacent two equally divide between the both ends edge of a wing of H shaped steel (21) and do not be connected through A shaped steel board subassembly or combination steel plate spare.
2. The recyclable combined type steel structure open caisson according to claim 1, wherein: the steel corner post is characterized by further comprising a steel cutting edge (3), the bottom of the steel cutting edge (3) is in a wedge shape, an opening is formed in the hollow interior of the steel cutting edge (3) and in the top of the hollow interior of the steel cutting edge, a tie steel plate (31) is arranged between the side walls of the inner cavity of the steel cutting edge (3), and the steel corner post (1) and the H-shaped steel (21) are inserted into the inner cavity of the steel cutting edge (3) and located on the upper portion of the tie steel plate (31).
3. The recyclable combined type steel-structured open caisson according to claim 1 or 2, wherein: still include steel ring roof beam (4), and steel ring roof beam (4) are the rectangle shape, steel ring roof beam (4) cover is established at steel corner post (1) and wall of a well (2) top.
4. The recyclable combined type steel structure open caisson according to claim 1, wherein: the H-shaped steel (21) and the angle steel (11), the H-shaped steel (21) and the A-shaped steel plate assembly, and the H-shaped steel (21) and the combined steel plate (23) are bolted and fixed through a plurality of bolt assemblies (5);
the bolt assembly (5) comprises two nuts (51) and a steel screw (52);
the two nuts (51) are respectively welded on one side face, far away from each other, of the angle steel (11), and the steel screw (52) penetrates through the angle steel (11) and the H-shaped steel (21) and is bolted with the nuts (51);
the two nuts (51) are respectively welded on one side face, far away from each other, of the two A-shaped steel plates (22), and the steel screw (52) penetrates through the H-shaped steel (21) and the inner and outer A-shaped steel plates (22) and is bolted with the nuts (51);
the two nuts (51) are respectively welded on one side face, far away from each other, of the two combined steel plates (23), and the steel screw (52) penetrates through the H-shaped steel (21) and the inner and outer combined steel plates (23) and is bolted with the nuts.
5. The recyclable combined type steel structure open caisson according to claim 1, wherein: combination steel sheet (23) include a slice first B shaped steel board (231), two C shaped steel board (232) and a slice second B shaped steel board (233), two all set up the semicircle orifice of mutually supporting on C shaped steel board (232), from last down being first B shaped steel board (231), two C shaped steel board (232) and second B shaped steel board (233) in proper order during combination steel sheet (23) aggregate erection, and the semicircle orifice of two C shaped steel board (232) sets up relatively and forms the round hole.
6. A construction method applied to the recyclable combined type steel-structured open caisson according to any one of claims 1 to 5, wherein: the construction method comprises the following steps:
s1: welding the steel cutting edge (3) into a whole at the well body position, and filling sand and stones into the cavity of the steel cutting edge (3);
s2: respectively inserting the steel corner post (1) and the H-shaped steel (21) into the steel blade foot (3), and then respectively bolting the A-shaped steel plate (22), the first B-shaped steel plate (231), the C-shaped steel plate (232) and the second steel plate (233) with the steel corner post (1) and the H-shaped steel (21) by using a steel screw (52) to form a well wall (2);
s3: buckling the segmented steel ring beam (4) on the steel corner post (1) and the well wall (2), and bolting the steel ring beam into an integral steel ring beam;
s4: sinking the well, digging soil to the bottom surface of the bottom sealing concrete by using mechanical equipment;
s5: pouring bottom sealing concrete and pouring a reinforced concrete bottom plate;
s6: carrying out trenchless pipeline construction operations such as pipe jacking, pipe pulling and the like on the reinforced concrete bottom plate;
s7: after the pipeline construction operation is finished, removing the construction machinery in the well, backfilling earthwork in the well, and dismantling the steel screw rod from bottom to top along with the backfilling of the earthwork;
s8: and (3) dismantling the steel ring beam (4) after the earth backfill is close to the ground, pulling out the A-shaped steel plate (22), the first B-shaped steel plate (231), the C-shaped steel plate (232) above the hole and the H-shaped steel (21) by using mechanical equipment, and then removing the steel corner post (1) to finish the dismantling.
7. The construction method of the recyclable combined type steel-structured open caisson according to claim 6, wherein: in the step S1, before welding the steel blade (3), the floor of the well body is leveled, and underground obstacles at the steel blade (3) of the open caisson are cleaned.
8. The construction method of the recyclable combined type steel-structured open caisson according to claim 6, wherein: the step S5 may further be: the steel plate is directly placed on the bottom sealing concrete to be used as a steel bottom plate.
9. The construction method of the recyclable combined type steel-structured open caisson according to claim 6, wherein: the open caisson operation in the step S4 can be performed in a drainage sinking mode or a non-drainage sinking mode according to the specific geological conditions of the field of view.
10. The construction method of the recyclable combined type steel-structured open caisson according to claim 6, wherein: the step S7 further includes: and constructing an inspection well required by the hydraulic engineering specialty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110558210.2A CN113463674A (en) | 2021-05-21 | 2021-05-21 | Recyclable combined steel structure open caisson and construction method thereof |
Applications Claiming Priority (1)
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