CN111691443B - Larsen steel sheet pile cofferdam and construction method thereof - Google Patents
Larsen steel sheet pile cofferdam and construction method thereof Download PDFInfo
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- CN111691443B CN111691443B CN202010576810.7A CN202010576810A CN111691443B CN 111691443 B CN111691443 B CN 111691443B CN 202010576810 A CN202010576810 A CN 202010576810A CN 111691443 B CN111691443 B CN 111691443B
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- guide rail
- larsen steel
- steel sheet
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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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/16—Auxiliary devices rigidly or detachably arranged on sheet piles for facilitating assembly
Abstract
The utility model relates to a Larsen steel sheet pile cofferdam, including two rows of Larsen steel sheet piles that set up along river course width direction, two rows of outer foundatin piles that are on a parallel with Larsen steel sheet pile and are located two rows of Larsen steel sheet pile outsides respectively, two rows of inner foundatin piles that are on a parallel with Larsen steel sheet pile and are located two rows of Larsen steel sheet pile inboards respectively, set up and be located the outer guide rail frame between Larsen steel sheet pile and the outer foundatin pile and set up and be located the inner guide rail frame between Larsen steel sheet pile and the inner foundatin pile along river course width direction, outer guide rail frame, inner guide rail frame demountable installation in outer foundatin pile, inner foundatin pile respectively, the end of two rows of Larsen steel sheet piles supports to the river bank, be provided with the positioner that advances line location to Larsen steel sheet pile on outer guide rail frame, the inner guide rail frame respectively. This application has the effect that reduces the construction degree of difficulty and improve the construction precision.
Description
Technical Field
The application relates to the technical field of cofferdams, in particular to a Larsen steel sheet pile cofferdam and a construction method thereof.
Background
With the development of urban construction, more and more river-related projects such as bridges, brake culverts, communication for crossing river channels, electric power, heat, water supply and drainage pipelines are provided. Due to the water passing characteristic of the river channel, the river channel needs to be guided and drained during construction of the projects. In the prior art, the traditional cofferdam is always inclined in the process of driving the steel sheet piles, so that a pit matched with the size of the steel sheet piles needs to be excavated in advance, the steel sheet piles are hung in the pit by utilizing a ship crane to ensure that the steel sheet piles are not inclined, however, the method has certain defects, if the size of the pre-excavated pit is not accurate enough, the steel sheet piles cannot be put into the pit if the pit is small, the steel sheet piles are still inclined if the pit is large, the construction difficulty is high, and the construction accuracy is low.
Disclosure of Invention
In order to reduce the construction difficulty and improve the construction precision, the application provides a Larsen steel sheet pile cofferdam and a construction method thereof.
The technical purpose of the application is realized by the following technical scheme:
the utility model provides a Larsen steel sheet pile cofferdam, includes two rows of Larsen steel sheet piles that set up along river course width direction, two rows of outer foundatin piles that are on a parallel with Larsen steel sheet pile and are located two rows of Larsen steel sheet pile outsides respectively, two rows of inner foundatin piles that are on a parallel with Larsen steel sheet pile and are located two rows of Larsen steel sheet pile inboards respectively, set up and be located the outer guide rail frame between Larsen steel sheet pile and the outer foundatin pile and set up and be located the inner guide rail frame between Larsen steel sheet pile and the inner foundatin pile along river course width direction, outer guide rail frame, inner guide rail frame demountable installation in outer foundatin pile, inner foundatin pile respectively, and the end of two rows of Larsen steel sheet piles supports to the river bank, be provided with the positioner that advances line location to Larsen steel sheet pile on outer guide rail frame, the inner guide rail frame respectively.
By adopting the technical scheme, the cofferdam is erected by adopting Larsen steel plates, the locking notches between every two Larsen steel plates are interlocked to form a Larsen steel plate pile which is relatively closed and has a water stop effect, the outer foundation is erected, the inner foundation pile respectively provides an installation base body for the outer guide rail frame and the inner guide rail frame, the outer guide rail frame and the inner guide rail frame are both provided with positioning devices for positioning the Larsen steel plate pile, so that in the process of erecting the Larsen steel plate pile, the locking notches of the Larsen steel plates in a lifting state can be conveniently aligned and installed at the locking notches of the Larsen steel plate pile inserted in the river bottom, and the installation efficiency and the installation accuracy of the Larsen steel plate pile are improved.
Preferably, the upper end surfaces of the outer guide rail frame and the inner guide rail frame are provided with slideways extending along the length direction of the outer guide rail frame and the inner guide rail frame, the positioning device comprises a moving frame connected to the outer guide rail frame and the inner guide rail frame in a sliding manner along the length direction of the outer guide rail frame and the inner guide rail frame, a driving assembly for driving the moving frame to slide, a positioning piece horizontally sliding along the direction close to or far from the Larsen steel sheet pile and used for abutting against the outer peripheral wall of the concave part of the Larsen steel sheet pile, and a first driving piece for driving the positioning piece to slide; the drive assembly comprises a walking wheel and a walking wheel rotating stepping motor, wherein the walking wheel is connected with the movable frame through a rotating shaft in a rotating mode and rolls in the slide way to drive the movable frame to slide, and the walking wheel rotating stepping motor drives the walking wheel to rotate.
Through adopting above-mentioned technical scheme, when setting up the larsen steel sheet pile, first driving piece drives the setting element and slides and carries out accurate location towards being close to the larsen steel sheet direction, thereby the concave part periphery wall butt of the larsen steel sheet that is in the lift state carries out effectively spacingly in the setting element to the larsen steel sheet of the lift state, the accurate scarf joint that slides of the fore shaft of two adjacent larsen steel sheets of being convenient for, set up the back that finishes, first driving piece drives the location and slides towards keeping away from the larsen steel sheet direction, make the setting element break away from with the concave part periphery wall of larsen steel sheet, then step motor drives the walking wheel and rotates, realize moving the frame and slide to next larsen steel sheet mounted position, step motor has good auto-lock nature, avoid moving the frame to take place to slide when setting up the larsen steel sheet pile and lead to the locating position to take place the deviation, guarantee the installation accuracy and the installation effectiveness of larsen steel sheet.
Preferably, the first driving member is a first hydraulic cylinder, a cylinder body of the first hydraulic cylinder is mounted on the movable frame, and an end portion of a piston rod of the first hydraulic cylinder is fixedly connected to the positioning member.
Through adopting above-mentioned technical scheme, the flexible setting element that drives of piston rod of first pneumatic cylinder slides towards the direction of being close to or keeping away from the Larsen steel sheet, and reaction rate is fast, further improves the efficiency of setting up of Larsen steel sheet pile.
Preferably, the setting element includes two guide ribs of butt in the two arc angles of the concave part outer wall of larsen steel sheet pile respectively, the lateral wall that the removal frame is close to larsen steel sheet pile is provided with two sliding seats that slide along larsen steel sheet pile direction of arranging, first driving piece is corresponding to be provided with two and respectively fixed connection between guide rib and sliding seat, the removal frame is provided with the adjusting part of adjusting two sliding seat intervals.
Through adopting above-mentioned technical scheme, be provided with adjusting part on the removal frame, the staff of being convenient for adjusts the distance between two sliding seats according to the Larsen steel sheet of unidimensional not to adjust the distance between two guide ribs, thereby realize that the setting element carries out accurate location to the Larsen steel sheet of unidimensional not, increase this positioner's application range, improve economic benefits.
Preferably, the adjusting part includes to rotate around self and connects in the accommodate the lead screw and the drive accommodate the lead screw pivoted adjusting hand wheel of removing the frame, accommodate the lead screw includes half section on the left and half section on the right, and half section on the left of accommodate the lead screw and half section on the right are provided with the external screw thread that screw thread direction is opposite respectively, and two sliding seats that the half section on the left of accommodate the lead screw and half section on the right were worn to locate by the screw thread respectively, and accommodate the lead screw's axis direction is parallel with the direction of sliding that removes the frame.
Through adopting above-mentioned technical scheme, when driving accommodate the lead screw rotation through rotating adjusting hand wheel, do simultaneously along the axial of transmission lead screw with two sliding seats of accommodate the lead screw left half section and right half section threaded connection respectively and be close to each other or keep away from and slide to make the interval of two location ribs adjust, carry out the accurate positioning with the Larsen steel sheet that satisfies not unidimensional, improve regulation efficiency.
Preferably, the outer foundation pile and the inner foundation pile are steel cylinders with openings at the bottom and sealed at the top, and the upper parts of the steel cylinders are provided with water injection holes communicated with the inner cavities.
Through adopting above-mentioned technical scheme, adopt the mode that the suction is sunk to run through to inject outer foundation pile, interior foundation pile into soft soil foundation, when follow-up outer foundation pile, interior foundation pile retrieve, adopt the mode of water injection in to the drum to make outer foundation pile, interior foundation pile lift out in the soft soil foundation rethread ship hoist and retrieve it, have construction convenience, with low costs and repeatedly usable's advantage.
Preferably, between outer guide rail frame and the outer basis stake all be provided with the mounting panel between inner guide rail frame and the inner basis stake, the mounting panel is close to outer basis stake lateral wall, inner guide rail frame through high strength bolt fixed connection in outer guide rail frame and is close to inner basis stake lateral wall, outer basis stake, inner basis stake all are provided with the staple bolt, fixedly connected with connecting plate between staple bolt and the mounting panel.
By adopting the technical scheme, the fixing of the outer guide rail frame and the outer foundation pile and the fixing of the inner guide rail frame and the inner foundation pile are realized through the mounting plate, the connecting plate and the anchor ear.
Preferably, inner pull rods are arranged between the head ends and the tail ends of the two rows of inner guide rail frames, and outer pull rods are arranged between the head ends and the tail ends of the two rows of outer guide rail frames.
By adopting the technical scheme, the inner pull rods are arranged between the two rows of inner guide rail frames, the two rows of inner guide rail frames are connected into a whole, the structural stability of the inner guide rail frames is improved, the outer pull rods are arranged between the two rows of outer guide rail frames, the two rows of outer guide rail frames are connected into a whole, and the structural stability of the outer guide rail frames is improved.
Another object of the present application provides a construction method of a larsen steel sheet pile cofferdam, comprising the following steps:
step S1, measuring and positioning, driving a set positioning control pile according to a construction design drawing, marking the contour line of the cofferdam by using iron wires along the control pile, and setting the Larsen steel plate pile position, the outer foundation pile position and the inner foundation pile position at the installation design interval;
step S2, driving an outer foundation pile and an inner foundation pile, and installing the outer foundation pile and the inner foundation pile in a riverbed in a suction penetration manner;
step S3, mounting an outer guide rail frame and an inner guide rail frame, fixing a mounting plate on the outer guide rail frame and the inner guide rail frame through high-strength bolts in advance, hoisting the outer guide rail frame and the inner guide rail frame to the relative positions of an outer foundation pile and an inner foundation pile through a ship crane, fixing the outer guide rail frame and the inner guide rail frame with the outer foundation pile and an inner foundation device respectively through anchor ears, and oppositely pulling the head ends and the tail ends of the two rows of the outer guide rail frames and the inner guide rail frame by using outer pull rods and inner pull rods respectively;
step S4, erecting Larsen steel sheet piles, lifting the Larsen steel sheet piles to positions corresponding to the outer guide rail frame and the inner guide rail frame by using a ship crane, then accurately positioning the Larsen steel sheet piles by using a positioning device, continuously ramming the Larsen steel sheet piles by using a vibration hammer, and constructing the next Larsen steel sheet pile after the Larsen steel sheet piles reach the design depth and the elevation;
step S5, removing the inner guide rail frame and the inner foundation pile, removing the inner pull rod, the anchor ear on the inner foundation pile and the inner guide rail frame in sequence, lifting the inner foundation pile out of the soft soil foundation by injecting water into the barrel of the inner foundation pile, and lifting and recovering the inner guide rail frame and the inner foundation pile by a ship crane;
step S6, filling soil in a weir core, filling bagged soil between the two rows of Larsen steel sheet piles, and leveling and compacting the Larsen steel sheet piles through a leveling device;
step S7, opposite pull rods are arranged in a penetrating mode, the opposite pull rods are arranged at the upper portions of the two rows of Larsen steel plate piles in a penetrating mode, and the structural stability of the two rows of Larsen steel plate piles is improved;
and S8, removing the outer guide rail frame and the outer foundation pile, removing the outer pull rod, the anchor ear on the outer foundation pile and the outer guide rail frame in sequence, lifting the outer foundation pile out of the soft soil foundation by injecting water into the barrel of the outer foundation pile, and lifting and recovering the outer guide rail frame and the outer foundation pile by a ship crane.
By adopting the technical scheme, the outer foundation pile and the inner foundation pile are both penetrated into the soft soil foundation in a suction penetration mode, and are lifted out of the soft soil foundation in a cylinder water injection mode when the outer foundation pile and the inner foundation pile are subsequently recovered, and then are recovered through the ship crane, so that the construction method has the advantages of convenience in construction, low cost and reusability; the Larsen steel sheet pile is transported in a ship-hanging mode, and the rammer is erected on the Larsen steel sheet pile through the vibration hammer, so that the Larsen steel sheet pile can be constructed without erecting a trestle, and the construction period is effectively shortened; the outer guide rail frame and the inner guide rail frame are respectively provided with a positioning device for positioning the Larsen steel plate pile, so that in the process of erecting the Larsen steel plate pile, the locking notch of the Larsen steel plate in a lifting state can be conveniently aligned and arranged on the locking notch of the Larsen steel plate pile inserted in the river bottom, and the installation efficiency and the installation precision of the Larsen steel plate pile are improved; and bagged soil is filled between the two rows of Larsen steel sheet piles to improve the shock resistance of the cofferdam and filled between the cofferdams in a bagged soil mode, so that later-stage recovery is facilitated.
Preferably, the leveling device comprises a movable crown block connected to the outer guide rail frame in a sliding manner along the length direction of the outer guide rail frame, a leveling mechanism arranged on the movable crown block and a lifting mechanism driving the leveling mechanism to lift; the lifting mechanism comprises a main arm which is vertically arranged, the upper end of the main arm is fixed on the movable crown block, a first secondary arm which is vertically arranged and is inserted into the main arm in a sliding mode along the length direction of the main arm, a second driving piece which drives the first secondary arm to slide, a second secondary arm which is vertically arranged and is inserted into the first secondary arm in a sliding mode along the length direction of the first secondary arm, and a third driving piece which drives the second secondary arm to slide; leveling mechanism is the level setting including fixed connection the mounting bracket and the axis of the lower extreme of secondary arm and rotates and connect in the mounting bracket in order to carry out the flattening roller of flattening compaction to the soil in bags.
In the step S6, hoisting bagged soil of a woven bag filled in advance into a weir core formed by two rows of larsen steel sheet piles by a ship crane, laying the bagged soil layer by layer from bottom to top, stacking the bagged soil neatly, and arranging the upper layer and the lower layer in a staggered manner; the movable crown block is lifted and installed on the outer guide rail frame through lifting equipment, after each layer of bagged soil is paved, the movable crown block moves along the outer guide rail frame along the distribution direction of Larsen steel sheet piles to drive the leveling rollers to level the bagged soil, and the height position of the leveling rollers is adjusted through the lifting mechanism according to the paving height of the bagged soil.
Through adopting above-mentioned technical scheme, carry out the flattening compaction to the soil in bags through the flattening roller, on the one hand, reduce the settlement volume of filling the soil in bags, on the other hand for the thickness of each layer soil in bags keeps unanimous basically, reduces the possibility that forms the passageway of gushing of irritating, with the construction quality of guaranteeing next layer soil in bags.
In summary, the present application includes at least one of the following beneficial technical effects:
the outer foundation and the inner foundation piles are erected to respectively provide installation matrixes for the outer guide rail frame and the inner guide rail frame, and the outer guide rail frame and the inner guide rail frame are both provided with positioning devices for positioning Larsen steel sheet piles, so that in the process of erecting the Larsen steel sheet piles, the locking openings of the Larsen steel sheets in a lifting state are conveniently aligned and installed in the locking openings of the Larsen steel sheet piles inserted in the river bottom, and the installation efficiency and the installation precision of the Larsen steel sheet piles are improved;
the adjusting assembly is arranged on the moving frame, so that a worker can adjust the distance between the two sliding seats according to Larsen steel plates with different sizes, the distance between the two guide ribs can be adjusted, the positioning piece can accurately position the Larsen steel plates with different sizes, the use range of the positioning device is enlarged, and the economic benefit is improved;
carry out the flattening compaction to the soil in bags through the flattening roller, on the one hand, reduce the settlement volume of filling soil in bags, on the other hand for the thickness of each layer soil in bags keeps unanimous basically, reduces the possibility that forms the passageway of irritating, with the construction quality of guaranteeing next layer soil in bags.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a Larsen steel sheet pile cofferdam;
FIG. 2 is a schematic partial three-dimensional structure diagram of a Larsen steel sheet pile cofferdam;
FIG. 3 is a schematic view of the positioning device;
FIG. 4 is a schematic structural view of the adjustment assembly;
FIG. 5 is a schematic structural view of a drive assembly;
FIG. 6 is a flow chart of a construction method of a Larsen steel sheet pile cofferdam;
FIG. 7 is a schematic view of the structure of the flattening apparatus;
fig. 8 is a schematic structural view of the elevating mechanism.
Description of reference numerals: 1. larsen steel sheet piles; 1a, Larsen steel plate; 2a, outer foundation piles; 2b, inner foundation piles; 21. hooping; 22. mounting a plate; 23. a connecting plate; 24. an inner pull rod; 3a, an outer guide rail bracket; 3b, an inner guide rail bracket; 31. a slideway; 32. a rack; 33. an outer pull rod; 4. a positioning device; 41. a movable frame; 42. a positioning member; 42a, guide ribs; 43. a first driving member; 44. a drive assembly; 441. a rotating shaft; 442. a traveling wheel; 443. a drive sprocket; 444. a stepping motor; 45. a sliding seat; 5. an adjustment assembly; 51. adjusting the screw rod; 52. adjusting a hand wheel; 6. a leveling device; 61. moving the crown block; 62. a lifting mechanism; 621. a main arm; 622. a first sub-arm; 623. a second secondary arm; 624. a second driving member; 625. a third driving member; 63. a leveling mechanism; 631. a mounting frame; 632. and (7) leveling rollers.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
The application discloses a Larsen steel sheet pile cofferdam, which is shown in figure 1 and figure 2 and comprises two rows of Larsen steel sheet piles 1 which are arranged along the width direction of a river and spliced by a plurality of Larsen steel sheets 1a, two rows of outer foundation piles 2a which are parallel to the Larsen steel sheet piles 1 and are respectively positioned at the outer sides of the two rows of Larsen steel sheet piles 1, two rows of inner foundation piles 2b which are parallel to the Larsen steel sheet piles 1 and are respectively positioned at the inner sides of the two rows of Larsen steel sheet piles 1, outer guide rail frames 3a which are arranged along the width direction of the river and are positioned between the Larsen steel sheet piles 1 and the outer foundation piles 2a, and inner guide rail frames 3b which are arranged along the width direction of the river and are positioned between the Larsen steel sheet piles 1 and the inner foundation piles 2b, wherein the outer guide rail frames 3a and the inner guide rail frames 3b are respectively and detachably arranged on the outer foundation piles 2a and the inner foundation piles 2b, the ends of the two rows of Larsen steel sheet piles 1 are abutted to the river bank, and the two ends of the inner guide rail frames 3b are both provided with inner pull rods 24, outer pull rods 33 are arranged between the head end and the tail end of the two rows of outer guide rail frames 3 a.
Referring to fig. 2 and 3, the outer foundation pile 2a and the inner foundation pile 2b are steel cylinders with openings at the bottom and sealed at the top, and the upper parts of the steel cylinders are provided with water injection holes communicated with the inner cavities. Outer foundation pile 2a, interior foundation pile 2b all are provided with staple bolt 21, between outer guide rail frame 3a and outer foundation pile 2a, all be provided with mounting panel 22 between interior guide rail frame 3b and the interior foundation pile 2b, mounting panel 22 is close to outer foundation pile 2a lateral wall, interior guide rail frame 3b is close to interior foundation pile 2b lateral wall through high strength bolt fixed connection in outer guide rail frame 3a, fixedly connected with connecting plate 23 between staple bolt 21 and the mounting panel 22.
Referring to fig. 3 and 4, the upper end surfaces of the outer rail frame 3a and the inner rail frame 3b are provided with a slide rail 31 extending along the length direction of the outer rail frame 3a and the inner rail frame 3b, the inner wall of the bottom of the slide rail 31 is provided with a rack 32 parallel to the slide rail 31, and the tooth surface of the rack 32 faces upward. The outer guide rail frame 3a and the inner guide rail frame 3b are respectively provided with a positioning device 4 for positioning the Larsen steel sheet pile 1, and the positioning device 4 comprises a movable frame 41 connected to the outer guide rail frame 3a and the inner guide rail frame 3b in a sliding manner along the length direction of the outer guide rail frame 3a and the inner guide rail frame 3b, a driving assembly 44 for driving the movable frame 41 to slide, a positioning piece 42 horizontally sliding along the direction close to or far from the Larsen steel sheet pile 1 and used for abutting against the outer peripheral wall of the concave part of the Larsen steel sheet pile 1, and a first driving piece 43 for driving the positioning piece 42 to slide. The side wall of the moving frame 41 close to the larsen steel sheet pile 1 is provided with two sliding seats 45 which slide along the arrangement direction of the larsen steel sheet pile 1, and the positioning member 42 comprises two guide ribs 42a which are respectively abutted against two arc-shaped angles of the outer wall of the concave part of the larsen steel sheet pile 1. The first driving members 43 are correspondingly provided with two first driving members and fixedly connected between the guide rib 42a and the sliding seat 45, respectively, the first driving members 43 are first hydraulic cylinders, the cylinder bodies of the first hydraulic cylinders are fixedly connected to the sliding seat 45, and the end portions of the piston rods of the first hydraulic cylinders are fixedly connected to the guide rib 42 a.
The moving frame 41 is provided with an adjusting assembly 5 for adjusting the distance between the two sliding seats 45, and the adjusting assembly 5 comprises an adjusting screw rod 51 which is rotatably connected to the moving frame 41 around the adjusting assembly 5 and an adjusting hand wheel 52 for driving the adjusting screw rod 51 to rotate. The adjusting screw rod 51 comprises a left half section and a right half section, the left half section and the right half section of the adjusting screw rod 51 are respectively provided with external threads with opposite thread directions, the left half section and the right half section of the adjusting screw rod 51 are respectively threaded through the two sliding seats 45, and the axis direction of the adjusting screw rod 51 is parallel to the sliding direction of the movable frame 41.
Referring to fig. 3 and 5, the driving assembly 44 includes a traveling wheel 442 rotatably connected to the movable frame 41 through a rotating shaft 441 and rolling in the slide rail 31 to drive the movable frame 41 to slide, a driving sprocket 443 fixedly sleeved on the rotating shaft 441 and located outside the movable frame 41, and a stepping motor 444 for driving the traveling wheel 442 to rotate. The traveling wheels 442 are gears engaged with the rack 32, the traveling wheels 442 are provided with two transmission sprockets 443 which are arranged along the length direction of the outer guide rail frame 3a and are in transmission connection with each other through a chain, the stepping motor 444 is fixedly connected to the outside of the moving frame 41, and the output shaft of the stepping motor 444 is coaxially and fixedly connected to one of the rotation shafts 441.
The implementation principle of the Larsen steel sheet pile 1 cofferdam in the embodiment of the application is as follows: when the Larsen steel sheet pile 1 is erected, a piston rod of a first hydraulic cylinder extends to drive a positioning piece 42 to slide towards the direction close to the Larsen steel sheet for accurate positioning, the peripheral wall of the outer circular corner of a concave part of the Larsen steel sheet in a lifting state abuts against a guide rib 42a, so that the Larsen steel sheet in the lifting state is effectively limited, locking openings of two adjacent Larsen steel sheets are conveniently and accurately slid and embedded, after the erection is finished, the piston rod of the first hydraulic cylinder contracts to drive the guide rib 42a to slide towards the direction away from the Larsen steel sheet, so that the positioning piece 42 is separated from the peripheral wall of the concave part of the Larsen steel sheet, a walking wheel 442 is driven by a stepping motor 444 to rotate, the moving frame 41 is slid to the installation position of the next Larsen steel sheet, the walking wheel 442 is meshed with a rack 32 in a slide way 31, the stepping motor 444 has good self-locking performance, and the deviation of the positioning position caused by the sliding of the moving frame 41 when the Larsen steel sheet pile 1 is erected is avoided, the mounting precision and the mounting efficiency of the Larsen steel plate are ensured.
The embodiment of the application also discloses a construction method of the Larsen steel sheet pile cofferdam, and the reference is 6, the method comprises the following steps:
step S1, measuring and positioning, driving a set control pile according to a construction design drawing, marking the contour line of the cofferdam by using iron wires along the control pile, and determining 1 position of a Larsen steel sheet pile, 2a positions of outer foundation piles and 2b positions of inner foundation piles according to the design distance;
step S2, driving the outer foundation pile 2a and the inner foundation pile 2b, and installing the outer foundation pile 2a and the inner foundation pile 2b in the riverbed in a suction penetration mode;
step S3, installing an outer guide rail frame 3a and an inner guide rail frame 3b, fixing an installation plate 22 on the outer guide rail frame 3a and the inner guide rail frame 3b through high-strength bolts in advance, hoisting the outer guide rail frame 3a and the inner guide rail frame 3b to the relative positions of an outer foundation pile 2a and an inner foundation pile 2b through a ship crane, fixing the outer guide rail frame 3a and the inner guide rail frame 3b with the outer foundation pile 2a and an inner foundation device respectively through anchor ears 21, and oppositely pulling the head and tail ends of the two rows of outer guide rail frames 3a and the inner guide rail frame 3b through outer pull rods 33 and inner pull rods 24 respectively;
step S4, erecting a Larsen steel sheet pile 1, hoisting the Larsen steel sheet pile 1 to a position corresponding to an outer guide rail frame 3a and an inner guide rail frame 3b by using a ship crane, then accurately positioning the Larsen steel sheet pile 1 by using a positioning device 4, continuously ramming the Larsen steel sheet pile 1 by using a vibration hammer, and constructing the next Larsen steel sheet pile 1 after the Larsen steel sheet pile 1 reaches a design depth and an elevation;
step S5, removing the inner guide rail frame 3b and the inner foundation pile 2b, removing the inner pull rod 24, the hoop 21 on the inner foundation pile 2b and the inner guide rail frame 3b in sequence, jacking the inner foundation pile 2b out of the soft soil foundation by adopting a mode of injecting water into the cylinder of the inner foundation pile 2b, and lifting and recovering the inner guide rail frame 3b and the inner foundation pile 2b by a ship crane;
step S6, filling soil in a weir core, filling bagged soil between the two rows of Larsen steel sheet piles 1, and leveling and compacting the Larsen steel sheet piles through a leveling device;
referring to fig. 7 and 8, the leveling device 6 includes a movable crown block 61 connected to the outer rail frame 3a in a sliding manner along the length direction of the outer rail frame 3a, a leveling mechanism 63 mounted on the movable crown block 61, and a lifting mechanism 62 for driving the leveling mechanism 63 to lift; the movable crown block 61 is provided with a hoisting hole for hoisting, the lifting mechanism 62 comprises a main arm 621 which is vertically arranged and the upper end of which is fixed on the movable crown block 61, a first sub-arm 622 which is vertically arranged and is slidably inserted in the main arm 621 along the length direction of the main arm 621, a second driving element 624 which drives the first sub-arm 622 to slide, a second sub-arm 623 which is vertically arranged and is slidably inserted in the first sub-arm 622 along the length direction of the first sub-arm 622, and a third driving element 625 which drives the second sub-arm 623 to slide;
the second driving element 624 is a second hydraulic cylinder which is arranged in the first secondary arm 622 and a cylinder body of which penetrates through the inner wall of the upper end of the second secondary arm 623, a piston rod of the second hydraulic cylinder is fixedly connected to the inner wall of the upper end of the main arm 621, and one end of the second hydraulic cylinder, which is close to the piston rod, is fixedly connected to the inner wall of the upper end of the first secondary arm 622; the third driving part 625 is a third hydraulic cylinder which is arranged in the first secondary arm 622, a cylinder body of the third hydraulic cylinder penetrates through the inner wall of the upper end of the second secondary arm 623, a piston rod of the third hydraulic cylinder is fixedly connected to the inner wall of the lower end of the second secondary arm 623, the cylinder body of the third hydraulic cylinder is fixedly connected to the inner wall of the upper end of the first secondary arm 622, and the second hydraulic cylinder and the third hydraulic cylinder are arranged in a staggered mode; the leveling mechanism 63 comprises a mounting frame 631 fixedly connected with the lower end of the second secondary arm 623 and a leveling roller 632, the axis of the leveling roller is horizontally arranged and is rotatably connected to the mounting frame 631 so as to level and compact bagged soil, and the length of the leveling roller 632 is smaller than the distance between the innermost sides of the two rows of Larsen steel sheet piles 1;
hoisting the bagged soil of the woven bags filled in advance into a weir core formed by the two rows of Larsen steel sheet piles 1 by a ship crane, laying the bagged soil layer by layer from bottom to top, stacking the bagged soil in order, and arranging the upper layer and the lower layer in a staggered manner; the movable crown block 61 is lifted and installed on the outer guide rail frame 3a through lifting equipment, after each layer of bagged soil is paved, the movable crown block 61 is moved along the outer guide rail frame 3a along the distribution direction of the Larsen steel sheet piles 1 to drive the leveling rollers 632 to level the bagged soil, the height position of the leveling rollers 632 is adjusted through the extension of the piston rods of the second hydraulic cylinder and the third hydraulic cylinder according to the paving height of the bagged soil, and the bagged soil filled in the concave parts of the Larsen steel sheet piles 1 located on the outer side is leveled manually.
Step S7, opposite pull rods are arranged in a penetrating mode, the opposite pull rods are arranged at the upper portions of the two rows of Larsen steel plate piles 1 in a penetrating mode, and the structural stability of the two rows of Larsen steel plate piles 1 is improved;
step S8, removing the outer guide rail frame 3a and the outer foundation pile 2a, removing the outer pull rod 33, the hoop 21 on the outer foundation pile 2a and the outer guide rail frame 3a in sequence, jacking the outer foundation pile 2a out of the soft soil foundation by injecting water into the cylinder of the outer foundation pile 2a, and lifting and recovering the outer guide rail frame 3a and the outer foundation pile 2a by a ship crane.
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 (8)
1. The utility model provides a larsen steel sheet pile cofferdam which characterized in that: the river course foundation pile comprises two rows of Larsen steel plate piles (1) arranged in the width direction of a river course, two rows of outer foundation piles (2a) which are parallel to the Larsen steel plate piles (1) and are respectively located on the outer sides of the two rows of Larsen steel plate piles (1), two rows of inner foundation piles (2b) which are parallel to the Larsen steel plate piles (1) and are respectively located on the inner sides of the two rows of Larsen steel plate piles (1), an outer guide rail frame (3a) which is arranged in the width direction of the river course and is located between the Larsen steel plate piles (1) and the outer foundation piles (2a), and an inner guide rail frame (3b) which is arranged in the width direction of the river course and is located between the Larsen steel plate piles (1) and the inner foundation piles (2b), wherein the outer guide rail frame (3a) and the inner guide rail frame (3b) are respectively and detachably mounted on the outer foundation piles (2a) and the inner foundation piles (2b), the ends of the two rows of Larsen steel plate piles (1) are abutted to the river course, and the river bank, and the outer guide rail frame (3a), The inner guide rail frame (3b) is respectively provided with a positioning device (4) for positioning the Larsen steel sheet pile (1); the upper end surfaces of the outer guide rail frame (3a) and the inner guide rail frame (3b) are provided with slideways (31) extending along the length direction of the outer guide rail frame (3a) and the inner guide rail frame (3b), the positioning device (4) comprises a moving frame (41) connected to the outer guide rail frame (3a) and the inner guide rail frame (3b) in a sliding manner along the length direction of the outer guide rail frame (3a) and the inner guide rail frame (3b), a driving assembly (44) for driving the moving frame (41) to slide, a positioning piece (42) horizontally sliding along the direction close to or far from the Larsen steel sheet pile (1) and used for abutting against the outer peripheral wall of the concave part of the Larsen steel sheet pile (1), and a first driving piece (43) for driving the positioning piece (42) to slide; the driving assembly (44) comprises a traveling wheel (442) which is rotatably connected to the moving frame (41) through a rotating shaft (441) and rolls in the slide way (31) to drive the moving frame (41) to slide and a stepping motor (444) which drives the traveling wheel (442) to rotate; the setting element (42) include two guide rib (42a) that butt respectively in the two arc angles of concave part outer wall of larsen steel sheet pile (1), the lateral wall that removes frame (41) and is close to larsen steel sheet pile (1) is provided with two sliding seats (45) that the direction slided along larsen steel sheet pile (1) arranges, first driving piece (43) are corresponding to be provided with two and respectively fixed connection between guide rib (42a) and sliding seats (45), remove frame (41) and be provided with adjusting part (5) of adjusting two sliding seats (45) intervals.
2. The larsen steel sheet pile cofferdam of claim 1, wherein: the first driving part (43) is a first hydraulic cylinder, the cylinder body of the first hydraulic cylinder is installed on the movable frame (41), and the end part of the piston rod of the first hydraulic cylinder is fixedly connected to the positioning part (42).
3. The larsen steel sheet pile cofferdam of claim 1, wherein: adjusting part (5) are including rotating around self and connecting in accommodate the lead screw (51) of removing frame (41) and drive accommodate the lead screw (51) pivoted adjusting hand wheel (52), accommodate the lead screw (51) including half section on the left and half section on the right, and half section on the left and half section on the right of accommodate the lead screw (51) are provided with the external screw thread opposite in screw thread direction respectively, two sliding seat (45) that half section on the left of accommodate the lead screw (51) and half section on the right were worn to locate by the screw thread respectively, and the axis direction of accommodate the lead screw (51) is parallel with the direction of sliding that removes frame (41).
4. The larsen steel sheet pile cofferdam of claim 1, wherein: the outer foundation pile (2a) and the inner foundation pile (2b) are steel cylinders with openings at the bottom and sealed at the top, and water injection holes communicated with the inner cavity are formed in the upper parts of the steel cylinders.
5. The larsen steel sheet pile cofferdam of claim 1, wherein: outer guide rail frame (3a) and outer foundation pile (2a) between all be provided with mounting panel (22) between inner guide rail frame (3b) and inner foundation pile (2b), mounting panel (22) are close to outer foundation pile (2a) lateral wall, inner guide rail frame (3b) and are close to inner foundation pile (2b) lateral wall through high strength bolt fixed connection in outer guide rail frame (3a), outer foundation pile (2a), inner foundation pile (2b) all are provided with staple bolt (21), fixedly connected with connecting plate (23) between staple bolt (21) and mounting panel (22).
6. The larsen steel sheet pile cofferdam of claim 1, wherein: and inner pull rods (24) are arranged between the head ends and the tail ends of the inner guide rail frames (3b) in the two rows, and outer pull rods (33) are arranged between the head ends and the tail ends of the outer guide rail frames (3a) in the two rows.
7. The construction method of larsen steel sheet pile cofferdam according to any one of claims 1-6, characterized in that: the method comprises the following steps:
step S1, measuring and positioning, driving a set-position control pile according to a construction design drawing, marking the contour line of the cofferdam along the control pile by using iron wires, and setting the Larsen steel sheet pile (1), the outer foundation pile (2a) and the inner foundation pile (2b) according to the design interval;
step S2, driving an outer foundation pile (2a) and an inner foundation pile (2b), and installing the outer foundation pile (2a) and the inner foundation pile (2b) in a riverbed in a suction penetration mode;
s3, mounting an outer guide rail frame (3a) and an inner guide rail frame (3b), fixing a mounting plate (22) on the outer guide rail frame (3a) and the inner guide rail frame (3b) through high-strength bolts in advance, hoisting the outer guide rail frame (3a) and the inner guide rail frame (3b) to the relative positions of an outer foundation pile (2a) and an inner foundation pile (2b) through a ship crane, fixing the outer guide rail frame (3a) and the inner guide rail frame (3b) with the outer foundation pile (2a) and an inner foundation device respectively through anchor ears (21), and oppositely pulling the head and tail ends of the two rows of outer guide rail frames (3a) and the inner guide rail frame (3b) through outer pull rods (33) and inner pull rods (24) respectively;
step S4, erecting a Larsen steel sheet pile (1), hoisting the Larsen steel sheet pile (1) to the corresponding positions of the outer guide rail frame (3a) and the inner guide rail frame (3b) by using a ship crane, then accurately positioning the Larsen steel sheet pile (1) by using a positioning device (4), continuously ramming the Larsen steel sheet pile (1) by using a vibration hammer, and constructing the next Larsen steel sheet pile (1) after the Larsen steel sheet pile (1) reaches the design depth and elevation;
s5, removing the inner guide rail frame (3b) and the inner foundation pile (2b), removing the inner pull rod (24), the hoop (21) on the inner foundation pile (2b) and the inner guide rail frame (3b) in sequence, jacking the inner foundation pile (2b) out of the soft soil foundation by adopting a mode of injecting water into the barrel of the inner foundation pile (2b), and lifting and recovering the inner guide rail frame (3b) and the inner foundation pile (2b) by a ship crane;
step S6, filling soil in a weir core, filling bagged soil between the two rows of Larsen steel sheet piles (1), and leveling and compacting the Larsen steel sheet piles through a leveling device (6);
s7, penetrating tie rods, wherein the tie rods penetrate through the upper parts of the two rows of Larsen steel plate piles (1), and the structural stability of the two rows of Larsen steel plate piles (1) is improved;
and S8, removing the outer guide rail frame (3a) and the outer foundation pile (2a), removing the outer pull rod (33), the hoop (21) on the outer foundation pile (2a) and the outer guide rail frame (3a) in sequence, jacking the outer foundation pile (2a) out of the soft soil foundation by adopting a mode of injecting water into the cylinder of the outer foundation pile (2a), and lifting and recovering the outer guide rail frame (3a) and the outer foundation pile (2a) by using a ship crane.
8. The construction method of the larsen steel sheet pile cofferdam of claim 7, wherein: the leveling device (6) comprises a movable crown block (61) connected with the outer guide rail frame (3a) in a sliding manner along the length direction of the outer guide rail frame (3a), a leveling mechanism (63) arranged on the movable crown block (61) and a lifting mechanism (62) driving the leveling mechanism (63) to lift; the lifting mechanism (62) comprises a main arm (621) which is vertically arranged, the upper end of the main arm is fixed to the movable crown block (61), a first sub-arm (622) which is vertically arranged and is slidably inserted into the main arm (621) along the length direction of the main arm (621), a second driving element (624) which drives the first sub-arm (622) to slide, a second sub-arm (623) which is vertically arranged and is slidably inserted into the first sub-arm (622) along the length direction of the first sub-arm (622), and a third driving element (625) which drives the second sub-arm (623) to slide; the leveling mechanism (63) comprises a mounting frame (631) fixedly connected with the lower end of the second secondary arm (623) and a leveling roller (632) of which the axis is horizontally arranged and is rotatably connected to the mounting frame (631) so as to level and compact bagged soil;
in the step S6, hoisting bagged soil of a woven bag filled in advance into a weir core formed by two rows of Larsen steel sheet piles (1) by a ship crane, laying the bagged soil layer by layer from bottom to top, stacking the bagged soil orderly, and arranging the upper layer and the lower layer in a staggered manner; the movable crown block (61) is lifted and installed on the outer guide rail frame (3a) through lifting equipment, after each layer of bagged soil is paved, the movable crown block (61) moves along the distribution direction of the Larsen steel sheet piles (1) along the outer guide rail frame (3a) to drive the leveling rollers (632) to level the bagged soil, and the height position of the leveling rollers (632) is adjusted through the lifting mechanism (62) according to the paving height of the bagged soil to be adjusted in a lifting mode.
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| CN113957891B (en) * | 2021-11-17 | 2023-03-24 | 大学士工程管理有限公司 | Auxiliary mounting equipment for steel sheet piles |
| CN114411789A (en) * | 2022-03-05 | 2022-04-29 | 三明市水利水电工程有限公司 | River channel precipitation construction method |
| CN115056010A (en) * | 2022-07-04 | 2022-09-16 | 青岛科技大学 | Automatic change control loading attachment |
| CN115059104B (en) * | 2022-08-01 | 2024-03-12 | 山东省大通建设集团有限公司 | Cofferdam structure for underwater tie beam construction and construction method thereof |
| CN116065612B (en) * | 2023-02-24 | 2023-07-28 | 广东省源天工程有限公司 | Deep water overlength steel sheet pile cofferdam construction device |
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