CN113981989A - Bridge main pier bearing platform foundation pit supporting structure and construction method thereof - Google Patents
Bridge main pier bearing platform foundation pit supporting structure and construction method thereof Download PDFInfo
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- CN113981989A CN113981989A CN202111427933.5A CN202111427933A CN113981989A CN 113981989 A CN113981989 A CN 113981989A CN 202111427933 A CN202111427933 A CN 202111427933A CN 113981989 A CN113981989 A CN 113981989A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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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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Abstract
The application relates to the field of building construction, and particularly discloses a foundation pit supporting structure of a bridge main pier bearing platform and a construction method thereof. Wherein, the supporting construction of foundation ditch includes a plurality of steel sheet piles that link up each other, and the steel sheet pile that links up each other forms foundation ditch retaining wall, the steel sheet pile includes the steel sheet pile main part, sets up first sealed linking up subassembly and the setting in steel sheet pile main part one side and is in the sealed linking up subassembly of second of steel sheet pile main part opposite side, during foundation ditch retaining wall shaping, two adjacent steel sheet pile main part reverse lock, the sealed linking up subassembly of first of steel sheet pile main part and the sealed linking up subassembly interlock of second of adjacent steel sheet pile main part each other, has guaranteed the leakproofness of linking up, has also guaranteed the intensity of linking up simultaneously. In addition, at the corners of the foundation pit of the bridge main pier bearing platform, two vertical foundation pit supporting walls are in sealed connection through corner connection plates, the corner connection plates ensure the sealing property and the strength of the connection of steel sheet piles at the end parts of the two foundation pit supporting walls, and the anti-permeability effect is good.
Description
Technical Field
The application relates to the field of building construction, in particular to a foundation pit supporting structure of a bridge main pier bearing platform and a construction method thereof.
Background
The bridge main pier bearing platform is a building structure for supporting a bridge span structure and transmitting constant load and vehicle live load to a foundation, and is arranged at the bottom of a bridge main pier. Because the bridge main pier bearing platform is generally poured at the water area of a riverbed, in order to facilitate building construction, a closed area is generally defined on the water area through a foundation pit supporting structure, water and sludge in the closed area are cleaned to form a bridge main pier bearing platform foundation pit, the foundation pit supporting structure is mainly formed by mutually engaging and connecting a plurality of concrete piles or steel sheet piles, taking the structure of the steel sheet piles as an example, the plurality of mutually engaged steel sheet piles form a foundation pit supporting wall, the foundation pit supporting wall is connected end to form the closed area, the bridge main pier bearing platform foundation pit can be formed by excavating construction in the closed area, and the foundation pit supporting wall mainly has the function of blocking water flow and sludge in the external water area.
In order to improve the sealing performance of the foundation pit supporting wall, some steel sheet piles are provided with mutually meshed sealing structures, for example, a Chinese patent with an authorization publication number of CN109853521B, a stepless amplitude modulation joint type steel sheet pile device is provided, which comprises a left half-width steel sheet pile and a right half-width steel sheet pile, wherein the width of the left half-width steel sheet pile is equal to that of the right half-width steel sheet pile; a sliding groove is formed in one side of the left half-width steel sheet pile in the width direction in the length direction; the width of the sliding groove can ensure that the right half-width steel sheet pile is inserted into the sliding groove; the left half-width steel sheet pile and the right half-width steel sheet pile form a stepless amplitude modulation joint type steel sheet pile with adjustable width.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: the steel sheet pile of mutual interlock exists the not high problem of leakproofness when linking up, and the steel sheet pile of foundation ditch corner especially has the concatenation gap very easily when linking up, leads to the wall infiltration of foundation ditch.
Disclosure of Invention
In order to solve the problem of improving the connection sealing performance of the steel sheet piles, the application provides a foundation pit supporting structure of a bridge main pier bearing platform and a construction method of the foundation pit supporting structure.
In a first aspect, the application provides a bridge owner mound cushion cap underground structure, adopts following technical scheme:
bridge owner mound cushion cap underground structure, including a plurality of steel sheet piles that link up each other, the steel sheet pile that links up each other forms foundation ditch retaining wall, the steel sheet pile includes the steel sheet pile main part, sets up first sealed linking up subassembly and the setting in steel sheet pile main part one side and is in the sealed linking up subassembly of second of steel sheet pile main part opposite side, during foundation ditch retaining wall shaping, the reverse lock of two adjacent steel sheet pile main parts, the sealed linking up subassembly of second of linking up subassembly and adjacent steel sheet pile main part of first of steel sheet pile main part interlock each other.
By adopting the technical scheme, the plurality of jointed steel sheet piles form the sealing foundation pit supporting wall, and the foundation pit supporting wall is arranged on the wall surface of the foundation pit of the bridge main pier bearing platform to play roles of reinforcing the wall surface of the foundation pit and preventing seepage.
Optionally, first sealed linking subassembly include with the first arc that steel sheet pile main part is connected links up the fishplate bar, installs two first spacing protruding stupexes in the first arc linkage fishplate bar outside and sets up the first joint board at first arc linkage fishplate bar tip, two form first joint groove between the first spacing protruding stupexes.
Through adopting above-mentioned technical scheme, holistic intensity has been guaranteed to first arc connection plate and steel sheet pile main part integrated into one piece, and first arc connection plate is the arc structure, makes things convenient for the lock to install.
Optionally, the sealed linking subassembly of second include with the second arc that the steel sheet pile main part is connected links up the fishplate bar, installs two spacing protruding stupexes of second in the second arc linkage fishplate bar outside and sets up the second joint fishplate bar at second arc linkage fishplate bar tip, two form the second joint groove between the spacing protruding stupeform of second.
Through adopting above-mentioned technical scheme, second arc links up fishplate bar and steel sheet pile main part integrated into one piece, has guaranteed holistic intensity, and second arc links up fishplate bar for the arc structure, makes things convenient for the lock to install.
Optionally, when two adjacent steel sheet pile main bodies are connected, a first arc-shaped connecting plate at one side of each steel sheet pile main body is reversely buckled with a second arc-shaped connecting plate at one side of the adjacent steel sheet pile main body, a first clamping plate at the end part of the first arc-shaped connecting plate is inserted into a second clamping groove at the outer side of the second arc-shaped connecting plate, and similarly, a second clamping plate at the end part of the second arc-shaped connecting plate is inserted into a first clamping groove of the first arc-shaped connecting plate of the steel sheet pile main body at the other side;
in addition, sealing rubber strips are arranged at the buckling positions of the first arc-shaped connecting plate and the second arc-shaped connecting plate, and the peripheral surfaces of the sealing rubber strips are in contact with the inner walls of the first arc-shaped connecting plate and the second arc-shaped connecting plate.
By adopting the technical scheme, when adjacent steel sheet pile main bodies are connected, the first arc-shaped connecting plate and the second arc-shaped connecting plate which are mutually buckled fix the connection position of the steel sheet pile main bodies, and play a primary sealing effect, the first arc-shaped connecting plate after being buckled is limited and fixed through the matching of the first clamping plate and the second clamping groove, and similarly, the second arc-shaped connecting plate after being buckled is limited and fixed through the matching of the second clamping plate and the first clamping groove, and a closed area is enclosed by the first arc-shaped connecting plate and the second arc-shaped connecting plate after being limited, so that the connection tightness is ensured, and the connection strength is also ensured The connection area of the second arc-shaped connection plate is further sealed, and water seepage at the connection position of the first arc-shaped connection plate and the second arc-shaped connection plate is prevented.
Optionally, two steel sheet piles at corners in the foundation pit are connected in a sealing manner through a corner connecting assembly, the corner connecting assembly comprises corner connecting plates, a protective shell arranged on the outer sides of the corner connecting plates, and a plurality of reinforcing ribs connected between the corner connecting plates and the protective shell;
the corner connecting plate is provided with a first arc-shaped connecting clamping groove and a second arc-shaped connecting clamping groove, the first arc-shaped connecting clamping groove corresponds to a first arc-shaped connecting plate of the steel sheet pile at the end part of the foundation pit supporting wall, and the second arc-shaped connecting clamping groove corresponds to a second arc-shaped connecting plate of the steel sheet pile at the end part of the foundation pit supporting wall;
the two sides of the corner connecting plates are respectively provided with a first limiting plate and a second limiting plate, the first limiting plate corresponds to a first clamping groove of the end part steel sheet pile of the foundation pit supporting wall, and the second limiting plate corresponds to a second clamping groove of the end part steel sheet pile of the foundation pit supporting wall.
By adopting the technical scheme, the corner connecting plate mainly plays a role in sealing connection of two steel sheet piles at the corner of a foundation pit of a main pier of a bridge, when the two steel sheet piles are in sealing connection, a first arc-shaped connecting plate on the steel sheet pile at one side of the corner connecting plate is inserted into a first arc-shaped connecting clamping groove from the top of the first arc-shaped connecting clamping groove, meanwhile, a first limiting plate on the corner connecting plate is inserted into a first clamping groove of the first arc-shaped connecting plate, at the moment, the first arc-shaped connecting plate and the first arc-shaped connecting clamping groove are mutually occluded, and the first limiting plate and the first clamping groove are mutually occluded;
in a similar way, the second arc connection plate on the steel sheet pile on the other side of the corner connection plate is inserted into the second arc connection clamping groove from the top of the second arc connection clamping groove, meanwhile, the second limiting plate on the corner connection plate is inserted into the second clamping groove of the second arc connection plate, at the moment, the second arc connection plate is mutually meshed with the second arc connection clamping groove, the second limiting plate is mutually meshed with the second clamping groove, the corner connection plate is used for connecting two vertical foundation pit support walls, the sealing performance and the strength of the connection of the end steel sheet piles of the two foundation pit support walls are guaranteed, and the anti-permeability effect is good.
Optionally, install crashproof wall subassembly on the inner wall of foundation ditch retaining wall, crashproof wall subassembly includes a plurality of crashproof wall templates that link up each other, and one side of crashproof wall template is equipped with first occlusal plate, and the opposite side of crashproof wall template is equipped with the second occlusal plate, and during the equipment, the first occlusal plate of crashproof wall template and the concatenation of the second occlusal plate of adjacent crashproof wall template, the concatenation department of first occlusal plate, second occlusal plate pass through anchor bolt fixed connection, crashproof wall template pass through anchor bolt with steel sheet pile main part fixed connection.
Through adopting above-mentioned technical scheme, anticollision wall subassembly fixed mounting plays protection, sealed effect to foundation ditch retaining wall on the wall of foundation ditch retaining wall, and the tidiness of foundation ditch retaining wall can be guaranteed simultaneously to the anticollision wall subassembly, conveniently is under construction in bridge main pier cushion cap foundation ditch inside. Moreover, each anti-collision wall template of the anti-collision wall assembly is mutually connected through the first snap close plate and the second snap close plate, and the anti-collision wall templates are conveniently connected and are convenient to disassemble and assemble.
In a second aspect, the application provides a construction method of a foundation pit supporting structure of a bridge main pier cushion cap, which comprises the following steps:
s1, arranging the steel sheet piles at the inner wall of the foundation pit of the bridge main pier bearing platform;
s2, pressing the bottom end of the steel sheet pile into the foundation of the foundation pit of the bridge main pier through a pile driver, mutually engaging and connecting adjacent steel sheet piles, and forming a foundation pit support wall by the connected steel sheet piles;
s3, mounting corner connection components at the corners of foundation pits of the bridge main pier bearing platform, and hermetically connecting the corner connection components with steel sheet piles at the end parts of foundation pit supporting walls at two sides of the corner connection components;
s4, fixedly mounting anti-collision wall formworks on the inner wall of the foundation pit supporting wall, and connecting adjacent anti-collision wall formworks in a sealing mode.
In summary, the present application includes at least one of the following beneficial technical effects: 1. when adjacent steel sheet piles of the structure are connected, the first arc-shaped connecting plate and the second arc-shaped connecting plate which are mutually buckled fix the connection position of a steel sheet pile main body, and simultaneously play a primary sealing effect, the first arc-shaped connecting plate after being buckled is limited and fixed through the matching of the first clamping plate and the second clamping groove, the second arc-shaped connecting plate is limited and fixed through the matching of the second clamping plate and the first clamping groove, a closed area is defined by the first arc-shaped connecting plate and the second arc-shaped connecting plate after being limited, the connection tightness is ensured, the connection strength is also ensured, and when the steel sheet pile main body is subjected to extrusion force, the connection position of the first arc-shaped connecting plate and the second arc-shaped connecting plate is not easy to loosen;
2. two perpendicular foundation ditch retaining walls are in sealed connection through corner linkage plate at the corner of the foundation ditch of the bridge main pier bearing platform, the corner linkage plate ensures the sealing property and the strength of the connection of the steel sheet piles at the end parts of the two foundation ditch retaining walls, and the anti-permeability effect is good.
Drawings
FIG. 1 is a schematic structural diagram of the present application;
FIG. 2 is a schematic view of a partial mounting configuration of the present application;
FIG. 3 is a schematic structural diagram of a bridge main pier bearing platform foundation pit surrounded by the bridge main pier bearing platform foundation pit;
FIG. 4 is a schematic view of the assembly of adjacent steel sheet piles according to the present application;
FIG. 5 is a schematic top view of the present application when assembled with adjacent steel sheet piles;
FIG. 6 is a schematic top view of the assembled adjacent steel sheet piles of the present application;
FIG. 7 is an assembled view of the steel sheet pile and corner engagement assembly of the present application;
fig. 8 is a schematic top view of the steel sheet pile of the present application after being connected to a corner engagement assembly.
Description of reference numerals: 1. steel sheet piles; 11. a steel sheet pile main body; 12. a first arcuate connector tile; 13. a first limit flange; 14. a first clamping connection plate; 15. a first clamping groove; 16. a second arcuate connector tile; 17. a second limiting convex edge; 18. a second clamping plate; 19. a second clamping groove; 110. sealing rubber strips;
2. supporting walls of the foundation pit; 3. a bridge main pier cushion cap foundation pit; 4. a corner joining component; 41. corner connector boards; 42. a protective shell; 43. reinforcing ribs; 44. the first arc-shaped connecting clamping groove; 45. the second arc-shaped connecting clamping groove; 46. a first limit plate; 47. a second limiting plate;
5. an impact wall assembly; 50. an anti-collision wall template; 51. a first bite plate; 52. a second bite plate; 53. and (6) anchoring the bolt.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
The embodiment of the application discloses bridge owner mound cushion cap underground structure. Referring to fig. 1, 2 and 3, the bridge main pier bearing platform foundation pit supporting structure comprises a plurality of steel sheet piles 1 which are connected with one another, the bottoms of the steel sheet piles 1 are pressed into a foundation of a construction area, the steel sheet piles 1 which are connected with one another form a foundation pit supporting wall 2, the foundation pit supporting walls 2 enclose a closed annular area, the bridge main pier bearing platform foundation pit 3 can be formed through excavation construction in the annular area, and the foundation pit supporting wall 2 is arranged on the wall face of the bridge main pier bearing platform foundation pit 3 to play a role in strengthening and preventing seepage of the foundation pit wall face.
Referring to fig. 4, 5, 6, wherein, the steel sheet pile 1 includes the steel sheet pile main part 11, sets up the first sealed linking assembly on one side of the steel sheet pile main part 11 and sets up the second sealed linking assembly on the other side of the steel sheet pile main part 11, and when the foundation ditch retaining wall 2 was fashioned, two adjacent steel sheet pile main parts 11 reverse lock, the first sealed linking assembly of steel sheet pile main part 11 and the second sealed linking assembly of adjacent steel sheet pile main part 11 interlock each other.
Further, first sealed linking subassembly includes the first arc linking plate 12 of being connected with steel sheet pile main part 11, install two first spacing protruding stupefied 13 in first arc linking plate 12 outside and set up the first joint board 14 at first arc linking plate 12 tip, form first joint groove 15 between two first spacing protruding stupefied 13, wherein, first arc linking plate 12 and steel sheet pile main part 11 integrated into one piece have guaranteed holistic intensity, first arc linking plate 12 is the arc structure, make things convenient for the lock installation.
In addition, the sealed linking subassembly of second includes the second arc linking plate 16 of being connected with steel sheet pile main part 11, install two spacing protruding stupefied 17 of second in the second arc linking plate 16 outside and set up the second joint fishplate bar 18 at second arc linking plate 16 tip, form second joint groove 19 between two spacing protruding stupefied 17 of second, wherein, second arc linking plate 16 and steel sheet pile main part 11 integrated into one piece have guaranteed holistic intensity, second arc linking plate 16 is the arc structure, make things convenient for the lock installation.
When two adjacent steel sheet pile main bodies 11 of the foundation pit supporting wall 2 are connected, the two adjacent steel sheet pile main bodies 11 are reversely arranged, a first arc-shaped connecting plate 12 at one side of each steel sheet pile main body 11 is reversely buckled with a second arc-shaped connecting plate 16 at one side of the adjacent steel sheet pile main body 11, a first clamping plate 14 at the end part of the first arc-shaped connecting plate 12 is inserted into a second clamping groove 19 at the outer side of the second arc-shaped connecting plate 16, and similarly, a second clamping plate 18 at the end part of the second arc-shaped connecting plate 16 is inserted into a first clamping groove 15 of the first arc-shaped connecting plate 12 of the steel sheet pile main body 11 at the other side;
the first arc-shaped connecting plate 12 and the second arc-shaped connecting plate 16 which are mutually buckled fix the connection position of the steel sheet pile main body 11, and simultaneously play a primary sealing effect, the first arc-shaped connecting plate 12 after being buckled is limited and fixed through the matching of the first clamping plate 14 and the second clamping groove 19, similarly, the second arc-shaped connecting plate 16 after being buckled is limited and fixed through the matching of the second clamping plate 18 and the first clamping groove 15, a closed area is enclosed by the first arc-shaped connecting plate 12 and the second arc-shaped connecting plate 16 after being limited, the tightness of the connection is ensured, the connection strength is also ensured, when the steel sheet pile main body 11 is extruded by external soil, the connection position of the first arc-shaped connecting plate 12 and the second arc-shaped connecting plate 16 is not easy to be loosened, in addition, in order to further improve the tightness of the connection, a sealing rubber strip 110 is arranged at the buckling position of the first arc-shaped connecting plate 12 and the second arc-shaped connecting plate 16, the sealing rubber strip 110 is located in a closed area surrounded by the first arc-shaped connecting plate 12 and the second arc-shaped connecting plate 16, the circumferential surface of the sealing rubber strip 110 is extruded by the first arc-shaped connecting plate 12 and the second arc-shaped connecting plate 16 after being buckled, and the sealing rubber strip 110 further seals the connection area of the first arc-shaped connecting plate 12 and the second arc-shaped connecting plate 16 to prevent water seepage at the connection position of the first arc-shaped connecting plate 12 and the second arc-shaped connecting plate 16.
According to the mode of linking up more than, can suitably change the quantity of steel sheet pile 1, the quantity of steel sheet pile 1 is more, the longer foundation ditch retaining wall 2 that forms, the length of foundation ditch retaining wall 2 is decided according to the size of the main mound cushion cap foundation ditch 3 of bridge of construction, under general conditions, the shape of the main mound cushion cap foundation ditch 3 of bridge is square, foundation ditch retaining wall 2 is all installed to four wall departments of the main mound cushion cap foundation ditch 3 of bridge, the tip of adjacent foundation ditch retaining wall 2 is close to the corner of the main mound cushion cap foundation ditch 3 of bridge, in order to guarantee the leakproofness that the adjacent foundation ditch retaining wall 2 of corner links up, link up 4 sealing connection through the corner between the steel sheet pile 1 of the adjacent foundation ditch retaining wall 2 of corner.
Referring to fig. 7 and 8, the corner connector assembly 4 comprises corner connector tiles 41, a protective shell 42 disposed on the outer side of the corner connector tiles 41, a plurality of reinforcing ribs 43 connected between the corner connector tiles 41 and the protective shell 42, the protective shell 42 serving as a support guard on the outer side of the corner connector tiles 41.
The corner connecting plate 41 is provided with a first arc-shaped connecting clamping groove 44 and a second arc-shaped connecting clamping groove 45, the first arc-shaped connecting clamping groove 44 corresponds to a first arc-shaped connecting plate 12 of one foundation pit supporting wall end part steel sheet pile 1 at a corner, and the second arc-shaped connecting clamping groove 45 corresponds to a second arc-shaped connecting plate 16 of the other foundation pit supporting wall end part steel sheet pile 1 at the corner;
in addition, the two sides of the corner connecting plate 41 are respectively provided with a first limiting plate 46 and a second limiting plate 47, the first limiting plate 46 corresponds to the first clamping groove 15 of one foundation pit supporting wall end part steel sheet pile 1 at a corner, and the second limiting plate 47 corresponds to the second clamping groove 19 of the other foundation pit supporting wall end part steel sheet pile 1 at the corner.
The corner connecting plate 41 mainly plays a role in sealing connection of two steel sheet piles 1 at the corner of a foundation pit of a main pier of a bridge, when the two steel sheet piles are in sealing connection, a first arc-shaped connecting plate 12 on the steel sheet pile 1 on one side of the corner connecting plate 41 is inserted into a first arc-shaped connecting clamping groove 44 from the top of the first arc-shaped connecting clamping groove 44, meanwhile, a first limiting plate 46 on the corner connecting plate 41 is inserted into a first clamping groove 15 of the first arc-shaped connecting plate 12, at the moment, the first arc-shaped connecting plate 12 is mutually occluded with the first arc-shaped connecting clamping groove 44, and the first limiting plate 46 is mutually occluded with the first clamping groove 15;
similarly, second arc linkage plate 16 on the steel sheet pile 1 of turning linkage plate 41 opposite side inserts in second arc linkage clamping groove 45 by the top that second arc linked up clamping groove 45, and simultaneously, second limiting plate 47 on turning linkage plate 41 inserts in second arc linkage clamping groove 19 of second arc linkage plate 16, at this moment, second arc linkage plate 16 links up the mutual interlock of clamping groove 45 with the second arc, second limiting plate 47 and the mutual interlock of second clamping groove 19, turning linkage plate 41 is used for linking up two vertically foundation ditch retaining walls 2, guarantee the leakproofness and the intensity that two foundation ditch retaining walls 2 tip steel sheet piles 1 are connected, impervious effectual.
Each foundation pit support wall 2's on 3 inside walls of bridge main pier cushion cap foundation ditch tip passes through behind the turning linking subassembly 4 links up, enclose into confined square foundation pit supporting structure, furthermore, in order to improve foundation pit support wall 2's leakproofness, finish and intensity, install crashproof wall subassembly 5 on foundation pit support wall 2's the inner wall, refer to fig. 2, crashproof wall subassembly 5 includes a plurality of crashproof wall templates 50 that link up each other, one side of crashproof wall template 50 is equipped with first occlusal plate 51, the opposite side of crashproof wall template 50 is equipped with second occlusal plate 52, during the equipment, crashproof wall template 5's first occlusal plate 51 splices with adjacent crashproof wall template 5's second occlusal plate 52, first occlusal plate 51, the concatenation department of second occlusal plate 52 passes through anchor bolt 53 fixed connection, crashproof wall template 52 passes through anchor bolt 53 and steel sheet pile main part 11 fixed connection.
The anti-collision wall component 5 is fixedly installed on the wall surface of the foundation pit supporting wall 2, plays a role in protecting and sealing the foundation pit supporting wall 2, and meanwhile, the anti-collision wall component 5 can guarantee the cleanliness of the wall surface of the foundation pit supporting wall 2, so that the construction inside the foundation pit 3 of the bridge main pier bearing platform is facilitated. Moreover, each anti-collision wall template 50 of the anti-collision wall assembly 5 is mutually connected through a first snap close board 51 and a second snap close board 52, and the anti-collision wall templates 50 are conveniently connected and are convenient to disassemble and assemble.
The embodiment of the application also discloses a construction method of the foundation pit supporting structure of the bridge main pier bearing platform, which comprises the following steps:
s1, arranging the steel sheet piles 1 at the inner wall of the foundation pit 3 of the bridge main pier bearing platform;
s2, pressing the bottom end of the steel sheet pile 1 into the foundation of the foundation pit 3 of the bridge main pier bearing platform through a pile driver, wherein adjacent steel sheet piles 1 are mutually occluded and jointed, when two adjacent steel sheet pile bodies 11 are jointed, two adjacent steel plate pile main bodies 11 are reversely arranged, a first arc-shaped connecting plate 12 at one side of the steel plate pile main body 11 is reversely buckled with a second arc-shaped connecting plate 16 at one side of the adjacent steel plate pile main body 11, a first clamping connection plate 14 at the end part of the first arc-shaped connecting plate 12 is inserted into a second clamping groove 19 at the outer side of the second arc-shaped connecting plate 16, similarly, a second clamping connection plate 18 at the end part of the second arc-shaped connecting plate 16 is inserted into a first clamping groove 15 of the first arc-shaped connecting plate 12 of the steel plate pile main body 11 at the other side, and simultaneously, inserting a sealing rubber strip 110 into the buckling position of the first arc-shaped connecting plate 12 and the second arc-shaped connecting plate 16, and forming a foundation pit supporting wall 2 by the connected steel sheet piles 1;
s3, mounting corner connecting components 4 at corners of foundation pits 3 of a main pier of the bridge, wherein the corner connecting components 4 are in sealing connection with the steel sheet piles 1 at the end parts of the foundation pit supporting walls 2 at two sides of the corner connecting components 4, during specific operation, a first arc-shaped connecting plate 12 on the steel sheet pile 1 at one side of a corner connecting plate 41 is inserted into a first arc-shaped connecting clamping groove 44 from the top of the first arc-shaped connecting clamping groove 44, and a first limiting plate 46 on the corner connecting plate 41 is inserted into a first clamping groove 15 of the first arc-shaped connecting plate 12; similarly, the second arc-shaped connecting plate 16 on the steel sheet pile 1 on the other side of the corner connecting plate 41 is inserted into the second arc-shaped connecting clamping groove 45 from the top of the second arc-shaped connecting clamping groove 45, and meanwhile, the second limiting plate 47 on the corner connecting plate 41 is inserted into the second clamping groove 19 of the second arc-shaped connecting plate 16;
s4, fixedly mounting the anti-collision wall templates 50 on the inner wall of the foundation pit supporting wall 2, sealing and connecting the adjacent anti-collision wall templates 50, and fixedly connecting the connected anti-collision wall templates 50 with the steel sheet pile main body 11 of the foundation pit supporting wall 2 through the anchor bolts 53.
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. Bridge owner mound cushion cap excavation supporting construction, including a plurality of steel sheet pile (1) that link up each other, steel sheet pile (1) that link up each other form foundation ditch retaining wall (2), its characterized in that: the steel sheet pile (1) comprises a steel sheet pile main body (11), a first sealing connection assembly arranged on one side of the steel sheet pile main body (11) and a second sealing connection assembly arranged on the other side of the steel sheet pile main body (11), when the foundation pit supporting wall (2) is formed, the two adjacent steel sheet pile main bodies (11) are reversely buckled, and the first sealing connection assembly of the steel sheet pile main body (11) is mutually meshed with the second sealing connection assembly of the adjacent steel sheet pile main body (11).
2. The bridge main pier cushion cap foundation pit supporting structure of claim 1, wherein: first sealed linking subassembly include with first arc linking plate (12) that steel sheet pile main part (11) are connected, install two first spacing protruding stupefied (13) in first arc linking plate (12) outside and set up first joint board (14) at first arc linking plate (12) tip, two form first joint groove (15) between first spacing protruding stupefied (13).
3. The bridge main pier cushion cap foundation pit supporting structure of claim 2, wherein: the sealed linking assembly of second include with second arc linking plate (16) that steel sheet pile main part (11) are connected installs in two spacing protruding stupehs (17) of second in second arc linking plate (16) outside and sets up second joint board (18) at second arc linking plate (16) tip, two form second joint groove (19) between the spacing protruding stupehs (17) of second.
4. The bridge main pier bearing platform foundation pit supporting structure of claim 3, wherein: when two adjacent steel sheet pile main bodies (11) are connected, a first arc-shaped connecting plate (12) on one side of each steel sheet pile main body (11) is reversely buckled with a second arc-shaped connecting plate (16) on one side of the adjacent steel sheet pile main body (11), and a first clamping plate (14) at the end part of the first arc-shaped connecting plate (12) is inserted into a second clamping groove (19) on the outer side of the second arc-shaped connecting plate (16).
5. The bridge main pier bearing platform foundation pit supporting structure of claim 3, wherein: two steel sheet piles (1) at the inner corner of a foundation pit (3) of the main bridge pier are connected in a sealing mode through a corner connecting component (4).
6. The bridge main pier cushion cap foundation pit supporting structure of claim 5, wherein: the corner engagement assembly (4) comprises corner engagement tiles (41), a protective shell (42) disposed outside the corner engagement tiles (41), a plurality of reinforcing ribs (43) connected between the corner engagement tiles (41) and the protective shell (42);
the corner connecting plate (41) is provided with a first arc connecting clamping groove (44) and a second arc connecting clamping groove (45), the first arc connecting clamping groove (44) corresponds to a first arc connecting plate (12) of a steel plate pile (1) at the end part of the foundation pit supporting wall (2), and the second arc connecting clamping groove (45) corresponds to a second arc connecting plate (16) of the steel plate pile (1) at the end part of the foundation pit supporting wall (2);
the two sides of the corner connecting plate (41) are respectively provided with a first limiting plate (46) and a second limiting plate (47), the first limiting plate (46) corresponds to a first clamping groove (15) of the end part steel sheet pile (1) of the foundation pit supporting wall, and the second limiting plate (47) corresponds to a second clamping groove (19) of the end part steel sheet pile (1) of the foundation pit supporting wall.
7. The bridge main pier bearing platform foundation pit supporting structure of claim 3, wherein: the buckling positions of the first arc-shaped connecting plate (12) and the second arc-shaped connecting plate (16) are provided with sealing rubber strips (110), and the peripheral surfaces of the sealing rubber strips (110) are in contact with the inner walls of the first arc-shaped connecting plate (12) and the second arc-shaped connecting plate (16).
8. The bridge main pier bearing platform foundation pit supporting structure of claim 3, wherein: and an anti-collision wall assembly (5) is installed on the inner wall of the foundation pit supporting wall (2).
9. The bridge main pier cushion cap foundation pit supporting structure of claim 8, wherein: anticollision wall subassembly (5) include a plurality of crashproof wall templates (50) that link up each other, and one side of crashproof wall template (50) is equipped with first occlusal plate (51), and the opposite side of crashproof wall template (50) is equipped with second occlusal plate (52), and during the equipment, the first occlusal plate (51) of crashproof wall template (50) and the concatenation of second occlusal plate (52) of adjacent crashproof wall template (50), and anchor bolt (53) fixed connection is passed through in the concatenation department of first occlusal plate (51), second occlusal plate (52), crashproof wall template (50) through anchor bolt (53) with steel sheet pile main part (11) fixed connection.
10. The construction method of the foundation pit supporting structure of the bridge main pier bearing platform is characterized by comprising the following steps of: the bridge main pier cap foundation pit supporting structure implementation of any one of claims 1 to 9, comprising the following steps:
s1, arranging the steel sheet piles (1) at the inner wall of the bridge main pier bearing platform foundation pit (3);
s2, pressing the bottom end of the steel sheet pile (1) into the foundation of the bridge main pier bearing platform foundation pit (3) through a pile driver, mutually engaging and connecting adjacent steel sheet piles (1), and forming a foundation pit supporting wall (2) by the connected steel sheet piles (1);
s3, mounting corner connecting components (4) at corners of foundation pits (3) of the main pier bearing platform of the bridge, and hermetically connecting the corner connecting components (4) with steel sheet piles (1) at the end parts of foundation pit supporting walls at two sides of the corner connecting components;
s4, fixedly mounting the anti-collision wall templates (50) on the inner wall of the foundation pit supporting wall (2), and sealing and connecting the adjacent anti-collision wall templates (50).
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