CN113073667A - Assembled cofferdam structure and construction method - Google Patents
Assembled cofferdam structure and construction method Download PDFInfo
- Publication number
- CN113073667A CN113073667A CN202110366919.2A CN202110366919A CN113073667A CN 113073667 A CN113073667 A CN 113073667A CN 202110366919 A CN202110366919 A CN 202110366919A CN 113073667 A CN113073667 A CN 113073667A
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- cofferdam
- steel
- pile
- supporting
- hanging box
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
- E02D5/08—Locking forms; Edge joints; Pile crossings; Branch pieces
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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
Abstract
The application relates to an assembled cofferdam structure and a construction method, the assembled cofferdam structure comprises a plurality of vertically arranged steel protecting cylinders and at least one hanging box in an annular structure, the steel protecting cylinders are distributed along the annular outline of the hanging box, the hanging box comprises a plurality of cofferdam steel plates, the cofferdam steel plates are divided into a plurality of groups, the cofferdam steel plates in the same group are mutually spliced and arranged between two adjacent steel protecting cylinders, the cofferdam steel plates are parallel to the axial direction of the steel protecting cylinders, the vertical two side edges of the cofferdam steel plates are respectively provided with a connecting component for connecting the adjacent cofferdam steel plates or the steel protecting cylinders, and a supporting component for supporting and serving as a construction platform is arranged inside the hanging box. The application can effectively reduce the waste of materials.
Description
Technical Field
The application relates to the field of cofferdam structures, in particular to an assembly type cofferdam structure and a construction method.
Background
The cofferdam is a temporary enclosing structure constructed for constructing a permanent water conservancy facility in the construction of water conservancy projects, and is mainly divided into an earth-rock cofferdam, a grass-soil cofferdam, a wooden sheet pile cofferdam, a wooden cage cofferdam, a steel sheet pile cofferdam, a reinforced concrete cofferdam, a lock catch pipe pile cofferdam and the like. The lock catch tubular pile cofferdam is widely applied because the lock catch tubular pile cofferdam has high strength, is easy to be driven into a hard soil layer, can be constructed in deep water, has good waterproof performance and can form various cofferdams according to requirements.
The existing steel sheet pile cofferdam construction method comprises the following steps: 1) connecting a high steel casing at a construction position, and installing inverted corbels at the upstream and downstream of the steel casing; 2) installing a hoisting system, a bottom plate and a hoisting box side plate at the tops of the plurality of steel casing cylinders; 3) assembling the hanging box on the bottom plate, and uniformly sinking the hanging box through a hanging system and placing the hanging box at the upside-down bracket; 4) plugging and pouring bottom sealing concrete; 5) pumping water into the hanging box, and firmly reinforcing and welding the inverted bracket and the steel casing when the pile head enters the bottom section of the bearing platform, so as to realize the conversion of a hanging system; and then removing the hanging system, cutting off the steel pile casing, cutting off the pile head, and finally reinforcing and welding the inverted corbel again through the steel beam.
In view of the above related technologies, the inventor thinks that in the actual construction process, after the pumping is completed, the steel casing needs to be cut off to reduce the occupation of the construction space in the hanging box, which may result in the waste of a large amount of materials.
Disclosure of Invention
In order to reduce the waste of materials, the application provides an assembly type cofferdam structure and a construction method.
In a first aspect, the present application provides an assembled weir structure, which adopts the following technical scheme:
the utility model provides an assembled cofferdam structure, includes the steel of a plurality of vertical settings and protects a and at least one hanging box that is cyclic annular structure, and is a plurality of the steel protects a distribution along the annular profile of hanging box, the hanging box includes a plurality of cofferdam steel sheets, and is a plurality of the cofferdam steel sheet divide into the multiunit, and is a plurality of with the group the cofferdam steel sheet splices each other and sets up between two adjacent steel protects a, the cofferdam steel sheet is on a parallel with the axial of steel protecting a, the vertical both sides border of cofferdam steel sheet is provided with the coupling assembling who is used for connecting adjacent cofferdam steel sheet or steel protecting a respectively, the inside supporting component who is used for supporting and is the construction platform that is provided with of hanging.
By adopting the technical scheme, during cofferdam construction, the steel pile casings are driven into a construction area to serve as a foundation and a positioning of a construction platform, then a plurality of groups of cofferdam steel plates are respectively inserted between two different adjacent steel pile casings and are fixedly connected with each other through the connecting components, so that an isolation effect is achieved; and do the support to a plurality of cofferdam steel sheets and a plurality of steel pile casings through supporting component to make in the work progress, the wholeness of steel pile casing and cofferdam steel sheet is better relatively, and after being built by the back cover concrete in the construction area, need not additionally cut off the steel pile casing, waste that can effectual reduction material, optimize the result of use.
Optionally, coupling assembling includes two connecting plates, the connecting plate is including being platelike connecting portion one, connecting portion two and the buckling part that is angle steel column structure, one side border fixed connection of connecting portion one protects a section of thick bamboo or cofferdam steel sheet in the steel, connecting portion two is the opposite side border turning over the shaping of connecting portion one, buckling part is angle steel column structure, one side border fixed connection of buckling part is in connecting portion two, buckling part's opposite side border sets up towards connecting portion one, and is same two buckling part mutual lock joints of coupling assembling, coupling assembling's profile is the plane helix.
By adopting the technical scheme, when the cofferdam steel plate is driven into a construction area, the buckling parts on the cofferdam steel plate which is not driven are inserted into the buckling parts on the driven cofferdam steel plate or steel pile casing, and then the buckling parts on the driven cofferdam steel plate or steel pile casing are guided, so that the inserting position of the cofferdam steel plate can be positioned, and meanwhile, the displacement of the cofferdam steel plate can be limited through the first connecting part and the second connecting part, so that the stability in use is optimized; connecting portion one and connecting portion two can also do the guard action to buckling part, reduce the possibility that buckling part is impaired in the transportation or the installation.
Optionally, the cross section of each cofferdam steel plate is isosceles trapezoid and the large end of each cofferdam steel plate is provided with an opening, each connecting part II is formed by folding and forming the connecting part I in a direction opposite to the direction of the opening of the large end of each cofferdam steel plate, and the opening directions of the two adjacent cofferdam steel plates are opposite.
Through adopting above-mentioned technical scheme, because the opening opposite direction of two adjacent cofferdam steel sheets sets up, in the work progress, the opening can apply the pressure of outside water to the buckling part on two adjacent cofferdam steel sheets towards the cofferdam steel sheet of a plurality of steel pile center one sides, thereby make under the pressure effect of outside water, make two adjacent buckling part inseparabler butt together, in order can be when connecting two adjacent cofferdam steel sheets, can also play better sealed effect, reduce the in-process of drawing water, the possibility of leaking between the adjacent cofferdam steel sheet.
Optionally, a sealing assembly for sealing is arranged between the two buckled parts buckled with each other.
Through adopting above-mentioned technical scheme, seal assembly can still can keep the leakproofness between two buckling parts of mutual lock joint under the circumstances of buckling part damage or appearance crack.
Optionally, the seal assembly includes inflation sealed post and the elastic sealing tube of inflation sealed post is located to the cover, the inflation sealed post is made for meeting water inflation material, a plurality of through-holes have been seted up to the elastic sealing tube.
Through adopting above-mentioned technical scheme, when installation seal assembly, only need to insert elasticity sealing tube and inflation sealing post and locate between the buckling parts of mutual lock, then the water of infiltration or artifical filling part water, make water permeate to inflation sealing post through the through-hole, make inflation sealing post inflation, in order to with the relative inseparabler laminating of elasticity sealing tube in the inner wall of two adjacent buckling parts, in order to keep relatively inseparable sealed effect, the hindrance that receives when can also reducing installation seal assembly simultaneously.
Optionally, the through hole is filled with a plugging block made of a water-soluble material.
Through adopting above-mentioned technical scheme, the shutoff piece can be before for using seal assembly, and the reduction leads to the sealed post inflation of inflation because of outside air humidity is too high or the mistake contacts water, and when the installation, the shutoff piece can make water still can contact the sealed post of inflation through the through-hole through dissolving in water simultaneously.
Optionally, the expansion sealing column is provided with a support strip in parallel with the expansion sealing column.
Through adopting above-mentioned technical scheme, the support bar can be done the support to inflation sealing post and elasticity sealing tube, reduces the installation in-process, because of inflation sealing post and elasticity sealing tube buckle and lead to the possibility of unable installation.
Optionally, the bottom of cofferdam steel sheet can be dismantled and be connected with the plug connector, the plug connector is platelike structure, the lower extreme along vertical cross-section under the plug connector is the acute angle setting, and is a plurality of the plug connector encloses to establish and is the annular structure and two adjacent plug connectors splice each other, the plug connector is located cofferdam steel sheet towards a plurality of cofferdam steel sheet center one side, the length of plug connector along the depth direction of water is greater than the thickness of back cover concrete.
Through adopting above-mentioned technical scheme, the plug connector can be when the back cover concrete, keep apart the bottom of back cover concrete and cofferdam steel sheet, when the cofferdam steel sheet need be demolishd in the later stage, only need with the relative plug connector of cofferdam steel sheet demolish can, the plug connector can also do certain protection to the back cover concrete simultaneously, optimize the stability of using.
Optionally, the support assembly includes a support ring in an annular shape, at least one transverse support beam and an inclined support tube, the outer ring edge of the support ring is attached to and detachably connected to the inner sides of the plurality of steel casing and the plurality of cofferdam steel plates, two ends of the transverse support beam are detachably connected to the support ring respectively, and two ends of the inclined support tube are detachably connected to the support ring or the transverse support beam respectively.
By adopting the technical scheme, the support ring can support a plurality of cofferdam steel plates and steel pile casings, the capability of resisting external water pressure of the cofferdam steel plates and the steel pile casings is optimized, and the support ring is further supported by the transverse support beam and the inclined support tube.
In a second aspect, the present application provides a construction method of an assembly type weir, which adopts the following technical scheme:
a construction method of an assembly type cofferdam comprises the following steps: measurement and positioning: marking the control points of the construction area, and rechecking: manufacturing a guide pile: manufacturing a guide pile through a steel pipe or a steel plate in advance; then constructing a guide pile in a construction area before constructing a steel sheet pile; and (3) steel sheet pile driving: manufacturing a preliminary construction platform through a guide pile, driving a prefabricated steel casing into a construction area through the construction platform, driving a plurality of cofferdam steel plates into the construction area under the guidance of a connecting component on the steel casing or the adjacent cofferdam steel plates to form a complete hanging box, and synchronously inserting a sealing component between two adjacent buckling parts; supporting a steel sheet pile: mounting fixed support rings at the tops of the cofferdam steel plates, then sequentially mounting a transverse support beam and an inclined support tube, and discharging water at the top in the hanging box; supporting a second steel sheet pile: installing a second group of support components below the support components already installed in the hanging box, and then discharging water in the hanging box again; dredging: discharging sludge at the bottom in the hanging box; bottom sealing: and (4) sealing the bottom of the hanging box through concrete pouring, wherein the top of the bottom sealing concrete is lower than the height of the plug connector.
In summary, the present application includes at least one of the following beneficial technical effects:
1. during cofferdam construction, steel pile casings are driven into a construction area to serve as a foundation and a positioning of a construction platform, then a plurality of groups of cofferdam steel plates are respectively inserted between two different adjacent steel pile casings and are mutually and fixedly connected through a connecting component, so that an isolation effect is achieved; and do the support to a plurality of cofferdam steel sheets and a plurality of steel pile casings through supporting component to make in the work progress, the wholeness of steel pile casing and cofferdam steel sheet is better relatively, and after being built by the back cover concrete in the construction area, need not additionally cut off the steel pile casing, waste that can effectual reduction material, optimize the result of use.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
Fig. 2 is a schematic structural view of the plug connector according to the embodiment of the present application.
Fig. 3 is an enlarged schematic view of a portion a of fig. 1.
FIG. 4 is a cross-sectional structural schematic view of a seal assembly according to an embodiment of the present application.
Fig. 5 is a schematic sectional view of the line B-B in fig. 1.
Fig. 6 is an enlarged schematic view of a portion C of fig. 1.
Description of reference numerals: 1. a steel casing; 2. cofferdam steel plate; 3. a connecting assembly; 31. a connecting plate; 311. a first connecting part; 312. a second connecting part; 313. a buckling part; 314. a butt joint plate; 4. a support assembly; 41. a support ring; 42. a transverse support beam; 43. an inclined supporting tube; 44. a fixing member; 441. a fixing plate; 442. a fixing pin; 443. a fixed port; 444. a restriction port; 445. fixing the arc plate; 45. fixing the bolt; 451. a screw section; 452. a head portion; 453. a confinement ring; 5. a seal assembly; 51. expanding the sealed column; 52. an elastic sealing tube; 521. a through hole; 522. a plugging block; 53. a supporting strip; 6. a plug-in unit; 61. a guide groove; 62. and (5) guiding the block.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses assembled weir structure.
Referring to fig. 1 and 2, the fabricated weir structure includes a plurality of vertically arranged steel casings 1 and at least one hanging box in a ring structure. A plurality of steel protect 1 along the annular profile distribution of cage, the cage includes a plurality of cofferdam steel sheets 2, and a plurality of cofferdam steel sheets 2 divide into the multiunit, and every group includes a plurality of cofferdam steel sheets 2 and sets up between two adjacent steel protect 1 with a plurality of cofferdam steel sheets 2 of group.
In addition, in order to facilitate the relative back cover concrete in later stage to dismantle cofferdam steel sheet 2, the bottom of cofferdam steel sheet 2 can be dismantled through the bolt and be connected with plug connector 6, and plug connector 6 is the lower extreme of vertical cross-section of the lower limb of platelike structure and plug connector 6 and is the acute angle setting to locate the construction region with plug connector 6. A plurality of plug connectors 6 enclose and establish and be the loop configuration to two adjacent plug connectors 6 are along the shaping respectively in opposite directions the side have guide slot 61 and guide block 62, and guide block 62 card is located the guide slot 61 on adjacent plug connector 6, in order leakproofness and the wholeness when optimizing the use, plug connector 6 is located cofferdam steel sheet 2 towards the one side at a plurality of cofferdam steel sheet 2 centers, and the vertical length of plug connector 6 is greater than the thickness of back cover concrete.
During construction, the back cover concrete can be protected and isolated from the cofferdam steel plate 2 through the plug connectors 6, so that the cofferdam steel plate 2 can be detached only by detaching the plug connectors 6 relative to the cofferdam steel plate 2, and convenience of construction is optimized.
Referring to fig. 1 and 3, the cofferdam steel plate 2 is of a folded plate-shaped structure, the cross section of the folded plate-shaped structure is isosceles trapezoid, and the isosceles trapezoid on the cross section of the cofferdam steel plate 2 is provided with a large-end opening so as to optimize the capacity of the cofferdam steel plate 2 for resisting external pressure during use. The both sides border of 2 length direction of cofferdam steel sheet is provided with the coupling assembling 3 that is used for connecting adjacent cofferdam steel sheet 2 or steel protects a 1 respectively, and a plurality of cofferdam steel sheets 2 of the same group splice each other through coupling assembling 3 to the clearance between two adjacent steel of shutoff protect 1, hang incasement portion and be provided with the supporting component 4 that is used for supporting and does construction platform.
When the construction, only need make earlier that steel protects a section of thick bamboo 1 and insert the underground of locating the construction region and do fixedly, then insert a plurality of cofferdam steel sheet 2 and locate the construction region, and it is sealed to fix each other through coupling assembling 3, supporting component 4 is used for protecting a plurality of cofferdam steel sheet 2 and steel and does the support, thereby make steel protect a section of thick bamboo 1 and need not additionally cut off, and can reduce the material extravagant while, can also protect the holistic intensity of 1 effectual increase hanging box through the steel, in order to optimize the result of use.
Referring to fig. 1 and 3, the connecting assembly 3 includes two connecting plates 31, each connecting plate 31 includes a first connecting portion 311, a second connecting portion 312, and a fastening portion 313, and each of the first connecting portion 311, the second connecting portion 312, and the fastening portion 313 is a plate-shaped structure.
The first connecting part 311 is formed by folding the side edge of the cofferdam steel plate 2 outwards, and the first connecting part 311 is vertical to the opening direction of the cofferdam steel plate 2; the second connecting part 312 is formed by bending the edge of one side of the first connecting part 311, which is far away from the cofferdam steel plate 2, towards the opposite direction of the opening direction of the cofferdam steel plate 2; the buckling part 313 is of an angle steel-shaped structure, one side edge of the buckling part 313 is fixedly connected to one side edge of the second connecting part 312, which is far away from the first connecting part 311, and the other side edge of the buckling part 313 extends towards the first connecting part 311.
Referring to fig. 1 and 3, two fastening parts 313 of the same connecting assembly 3 are fastened with each other, and the opening directions of two adjacent cofferdam steel plates 2 are opposite, so that in the construction process, external water can apply pressure towards the centers of a plurality of steel casings 1 to the cofferdam steel plates 2, at the moment, the pressure towards the centers of the plurality of steel casings 1 of two adjacent cofferdam steel plates 2 can be borne by the two fastening parts 313 fastened with each other, the tightness degree of the fit between the two fastening parts 313 fastened with each other is increased by the pressure, the tightness between the adjacent cofferdam steel plates 2 is effectively optimized, the first connecting parts 311 can be limited by the second connecting part 312 to move away from or towards each other, and the integrity in use is optimized; in addition, the buckling part 313 can be protected by the first connecting part 311 and the second connecting part 312, and the possibility that the buckling part 313 is damaged during transportation or use is reduced.
Meanwhile, in order to further increase the stability of the fastening between two adjacent fastening portions 313, the edges of the fastening portions 313 far away from the second connecting portion 312 are turned over towards the connected cofferdam steel plate 2 to form abutting plates 314, and the two abutting plates 314 of the two fastening portions 313 fastened with each other are parallel to each other and are limited to optimize the stability in use.
Referring to fig. 3 and 4, a sealing assembly 5 for further sealing is further disposed between two adjacent fastening portions 313. The sealing assembly 5 includes an inflatable sealing column 51 and an elastic sealing tube 52 sleeved on the inflatable sealing column 51, wherein the inflatable sealing column 51 is made of a water-swellable material, such as water-absorbent resin or water-swellable rubber. The elastic sealing tube 52 is made of rubber or silica gel.
The elastic sealing tube 52 is provided with a plurality of through holes 521 penetrating the tube wall, and the through holes 521 are filled with a plugging block 522 made of water-soluble material, which can be water-soluble fiber and polyethylene glycol. When the sealing assembly is used, the sealing assembly 5 is arranged between the two adjacent buckling parts 313, the plugging blocks 522 in the through holes 521 can be dissolved by the infiltration of water, the expansion sealing columns 51 are expanded, the elastic sealing pipes 52 are relatively tightly attached to the inner walls of the two adjacent buckling parts 313, the sealing is realized, and meanwhile, the occupied space during the installation of the sealing assembly 5 can be further reduced, so that the installation is facilitated.
In addition, in order to further reduce the inconvenience of installation due to the bending of the seal assembly 5, the expansion seal post 51 is provided with a support bar 53 having the same central axis as the support bar 53, the support bar 53 is in a screw shape and is made of a rigid material, such as steel, for supporting the expansion seal post 51 and the elastic seal tube 52, so as to reduce the possibility of bending of the expansion seal post 51 and the elastic seal tube 52 when the seal assembly 5 is installed.
Referring to fig. 1, the support assembly 4 includes a support ring 41 having a ring structure, at least one transverse support beam 42, and at least one inclined support tube 43, wherein an outer ring edge of the support ring 41 is fitted to and detachably attached to the plurality of steel casing 1 by bolts, and an outer wall of an isosceles trapezoid small end of the cofferdam steel plate 2 having an opening away from a center of the plurality of steel casing 1 is fitted to and detachably attached to the support ring 41 by bolts. The support ring 41 is formed by welding an I-shaped steel or channel steel in an enclosing manner, so that a plurality of cofferdam steel plates 2 or steel pile casings 1 can be supported at the same time, and the integrity and the external pressure resistance are improved in use.
Referring to fig. 5 and 6, fixing members 44 are respectively disposed at both ends of the transverse support beam 42 and/or both ends of the inclined support tube 43, the fixing members 44 include a fixing plate 441 and a plurality of fixing pins 442, and the fixing plate 441 is opened with two fixing openings 443 that open downward. One end of the fixing pin 442 is fixedly connected to the inner wall of the support ring 41 or the inner wall of the transverse support beam 42, and the other end of the fixing pin 442 is bent upward for engaging with the fixing plate 441. Therefore, when the supporting component is installed, the fixing pin 442 can be clamped in the fixing opening 443 to support the transverse supporting beam 42 and/or the inclined supporting tube 43, so that the installation process of the supporting component 4 is simplified, and additional hoisting in the installation process is not needed.
Referring to fig. 5 and 6, a plurality of limiting openings 444 are respectively formed at two opening edges of the fixing opening 443, the limiting openings 444 are arranged in a one-to-one correspondence manner, a fixing arc plate 445 perpendicular to the fixing plate 441 is fixedly connected to the edge of the limiting opening 444, an outer wall of the fixing arc plate 445 is in a conical surface-shaped structure, and a large end of the fixing arc plate 445 is fixedly connected to the fixing plate 441.
Two restriction ports 444 that the one-to-one set up are worn to be equipped with fixing bolt 45, fixing bolt 45 includes screw rod portion 451, spiral shell head portion 452 and restriction ring 453, spiral shell head portion 452 fixed connection is in the one end of screw rod portion 451, the opening border fixed connection of restriction ring 453 is in spiral shell head portion 452, screw rod portion 451, spiral shell head portion 452 and restriction ring 453 set up with the central axis, and two fixed arc 445 at one-to-one restriction port 444 opening border are blocked and are located between restriction ring 453 and screw rod portion 451, the outer wall of restriction ring 453 is the conical surface form structure and it sets up towards spiral shell head portion 452 for the tip.
When the screw part 451 is used, the screw part 451 is used for being in threaded connection with the support ring 41 or the transverse support beam 42, at the moment, the two fixed arc plates 445 corresponding to the opening edge of the limit opening 444 are clamped between the limit ring 453 and the screw part 451, the two clamped fixed arc plates 445 are elastically bent oppositely through the inner wall of the limit ring 453, at the moment, the screw part 451 can limit the bending of the fixed arc plates 445, and clamp the fixed arc plates 445 between the limit ring 453 and the outer wall of the screw part 451, so that the influence of the load bearing capacity of the fixed plate 441 due to the fixed opening 443 is reduced, meanwhile, the auxiliary support can be further performed through the fixed arc plates 445, and the stability and the load bearing capacity during use are optimized.
The embodiment of the application also discloses a construction method of the assembly type cofferdam. The construction method of the assembly type cofferdam comprises the following steps:
measurement and positioning: marking the control points of the construction area, and rechecking: in addition, before construction, the cofferdam steel plate 2 needs to be checked and sorted before entering the field, the defects are found to be adjusted at any time, and after sorting, the steel plate is prevented from bending and deforming as much as possible during transportation and stacking, so that collision is avoided.
Manufacturing a guide pile: manufacturing a guide pile through a steel pipe or a steel plate in advance; then constructing a guide pile in a construction area before constructing a steel sheet pile;
and (3) steel sheet pile driving: manufacturing a preliminary construction platform through guide piles, driving a prefabricated steel casing 1 into a construction area through the construction platform, driving a plurality of cofferdam steel plates 2 into the construction area under the guidance of connecting components 3 on the steel casing 1 or the adjacent cofferdam steel plates 2, forming a complete hanging box, and synchronously inserting sealing components 5 between two adjacent buckling parts 313; in addition, when the cofferdam steel plate 2 is inserted, the insertion sequence is performed along the direction of the guide block 62 on the inserting piece 6 towards the guide groove 61, so as to reduce the interference of the guide block 62 on the cofferdam steel plate 2 in the using process.
Supporting a steel sheet pile: installing a fixed support ring 41 on the tops of a plurality of cofferdam steel plates 2, then sequentially installing a transverse support beam 42 and an inclined support tube 43, and discharging water on the top in the hanging box;
supporting a second steel sheet pile: installing a second group of support components 4 below the installed support components 4 in the hanging box, and then discharging water in the hanging box again;
dredging: discharging sludge at the bottom in the hanging box;
bottom sealing: and (4) sealing the bottom of the hanging box through concrete pouring, wherein the top of the sealing concrete is lower than the height of the plug connector 6.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides an assembled weir structure, includes a plurality of vertical setting's steel protects a section of thick bamboo (1) and at least one and is the hanging box of loop configuration, and is a plurality of steel protects a section of thick bamboo (1) and distributes its characterized in that along the annular profile of hanging box: the cofferdam steel plate assembly is characterized in that the suspension box comprises a plurality of cofferdam steel plates (2) which are divided into a plurality of groups, the cofferdam steel plates (2) in the same group are spliced with each other and are arranged between two adjacent steel pile casings (1), the cofferdam steel plates (2) are parallel to the axial direction of the steel pile casings (1), the vertical two side edges of the cofferdam steel plates (2) are respectively provided with a connecting component (3) for connecting the adjacent cofferdam steel plates (2) or the steel pile casings (1), and a supporting component (4) for supporting and serving as a construction platform is arranged inside the suspension box.
2. An assembled weir structure according to claim 1, wherein: coupling assembling (3) include two connecting plates (31), connecting plate (31) are including being platelike connecting portion (311), connecting portion two (312) and buckling part (313) that are angle steel column structure, one side border fixed connection in steel pile casing (1) or cofferdam steel sheet (2) of connecting portion (311), connecting portion two (312) are the opposite side border folding shaping of connecting portion one (311), buckling part (313) are angle steel column structure, one side border fixed connection in connecting portion two (312) of buckling part (313), the opposite side border of buckling part (313) sets up towards connecting portion one (311), and is same two buckling part (313) of coupling assembling (3) are buckled each other, the profile of coupling assembling (3) is plane helix.
3. An assembled weir structure according to claim 2, wherein: the cross section of each cofferdam steel plate (2) is isosceles trapezoid and the large end of each cofferdam steel plate is provided with an opening, each connecting part II (312) is formed by folding and forming the connecting part I (311) in a direction opposite to the direction of the large end opening of each cofferdam steel plate (2), and the opening directions of the adjacent two cofferdam steel plates (2) are opposite.
4. An assembled weir structure according to claim 2, wherein: and a sealing component (5) for sealing is arranged between the two buckled parts (313).
5. An assembled weir structure according to claim 4, wherein: the sealing assembly (5) comprises an expansion sealing column (51) and an elastic sealing tube (52) sleeved on the expansion sealing column (51), the expansion sealing column (51) is made of water-swellable materials, and a plurality of through holes (521) are formed in the elastic sealing tube (52).
6. An assembled weir structure according to claim 5, wherein: and a plugging block (522) made of a water-soluble material is filled in the through hole (521).
7. An assembled weir structure according to claim 5, wherein: the expansion sealing column (51) is provided with a supporting strip (53) in parallel with the expansion sealing column.
8. An assembled weir structure according to claim 1, wherein: the bottom of cofferdam steel sheet (2) can be dismantled and be connected with plug connector (6), plug connector (6) are platelike structure, the lower extreme along vertical cross-section below plug connector (6) is the acute angle setting, and is a plurality of plug connector (6) enclose to establish and are the annular structure and splice each other two adjacent plug connector (6), plug connector (6) are located cofferdam steel sheet (2) towards a plurality of cofferdam steel sheet (2) center one side, the length of plug connector (6) along the depth direction of water is greater than the thickness of back cover concrete.
9. An assembled weir structure according to claim 1, wherein: the supporting component (4) comprises a supporting ring (41) in an annular shape, at least one transverse supporting beam (42) and an inclined supporting tube (43), the outer ring edge of the supporting ring (41) is attached to and detachably connected to the inner sides of the steel pile casings (1) and the cofferdam steel plates (2), two ends of the transverse supporting beam (42) are detachably connected to the supporting ring (41) respectively, and two ends of the inclined supporting tube (43) are detachably connected to the supporting ring (41) or the transverse supporting beam (42) respectively.
10. A construction method of an assembly type cofferdam is characterized in that: the method comprises the following steps: measurement and positioning: marking the control points of the construction area, and rechecking: manufacturing a guide pile: manufacturing a guide pile through a steel pipe or a steel plate in advance; then constructing a guide pile in a construction area before constructing a steel sheet pile; and (3) steel sheet pile driving: manufacturing a preliminary construction platform through guide piles, driving a prefabricated steel pile casing (1) into a construction area through the construction platform, driving a plurality of cofferdam steel plates (2) into the construction area under the guidance of connecting components (3) on the steel pile casing (1) or the adjacent cofferdam steel plates (2), forming a complete hanging box, and synchronously inserting a sealing component (5) between the two adjacent buckling parts (313); supporting a steel sheet pile: the top parts of a plurality of cofferdam steel plates (2) are provided with fixed support rings (41), then a transverse support beam (42) and an inclined support tube (43) are sequentially arranged, and water at the top part in the hanging box is discharged; supporting a second steel sheet pile: a second group of support components (4) are arranged below the support components (4) arranged in the hanging box, and then the water in the hanging box is drained again; dredging: discharging sludge at the bottom in the hanging box; bottom sealing: and (3) pouring the bottom of the hanging box with concrete to form a back cover, wherein the top of the back cover concrete is lower than the height of the plug connector (6).
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