CN109653225B - Steel sheet pile cofferdam and construction method thereof - Google Patents
Steel sheet pile cofferdam and construction method thereof Download PDFInfo
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- CN109653225B CN109653225B CN201811645414.4A CN201811645414A CN109653225B CN 109653225 B CN109653225 B CN 109653225B CN 201811645414 A CN201811645414 A CN 201811645414A CN 109653225 B CN109653225 B CN 109653225B
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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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Abstract
The invention relates to a steel sheet pile cofferdam, which comprises a steel sheet pile cofferdam guide frame, a temporary pouring platform of the steel sheet pile cofferdam and a steel sheet pile cofferdam stabilizing system; the steel sheet pile cofferdam stabilizing system comprises a steel pile casing, a transverse support, a longitudinal support, a balance sand bag, a winch and a lifting platform; the steel sheet pile cofferdam guide frame comprises an inner guide frame, an outer guide frame and a guide frame support system; the temporary pouring platform for the steel sheet pile cofferdam comprises a fixed slide rail, a pouring platform and a pouring device. The invention has the beneficial effects that: according to the cofferdam construction method, the fixed slide rail is fixed at the top of the steel casing, the pouring platform is embedded with the fixed slide rail, the platform sliding wheel is arranged on the platform, the pouring platform can slide along the fixed slide rail, in addition, the pouring device can slide along the pouring pipe slide way on the pouring platform, and finally, the bottom sealing range can cover the whole cofferdam field.
Description
Technical Field
The invention belongs to the field of cofferdams, and particularly relates to a steel sheet pile cofferdam and a construction method thereof.
Background
The cofferdam is a temporary enclosure structure constructed for constructing permanent water conservancy facilities in the water conservancy project construction. The cofferdam has the functions of preventing water and soil from entering the building position of the building so as to drain water in the cofferdam, excavate a foundation pit and build the building. The cofferdam is mainly used in hydraulic buildings in general, and the cofferdam is dismantled after being used up except for being used as a part of a formal building. The cofferdam height is higher than the highest water level that may occur during construction. The traditional cofferdam is often askew in the process of driving the steel sheet pile, so a pit which is matched with the size of the steel sheet pile needs to be excavated in advance, the steel sheet pile is hung in the pit by using a crane to ensure that the steel sheet pile does not incline, however, the method has certain defects, if the size of the pre-excavated soil pit is not accurate enough, the steel sheet pile cannot be put into the pre-excavated soil pit if the pre-excavated soil pit is small, and the large steel sheet pile still inclines. In addition, the cofferdam engineering generally has a bottom sealing function, the traditional construction method is that a pouring pipe is led into the position of the bottom sealing function, then concrete is poured, and after one construction section is finished, the equipment is moved to the next construction section. The method has low efficiency, and in the bottom sealing process, if the cofferdam area is large, the pouring device needs to be moved for many times, and the pouring device has large volume and needs to consume a large amount of manpower and material resources; the impact resistance of the cofferdam is improved by filling fine sand at two sides of the cofferdam in engineering, and although the method can effectively improve the impact resistance of the cofferdam, the filled fine sand is not easy to recover after the construction is finished.
In summary, there is a need for a steel sheet pile cofferdam and a construction method thereof that can ensure the driving perpendicularity of the steel sheet pile, efficiently seal the bottom and improve the impact capability of the cofferdam.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a steel sheet pile cofferdam and a construction method thereof.
The steel sheet pile cofferdam comprises a steel sheet pile cofferdam guide frame, a temporary pouring platform of the steel sheet pile cofferdam and a steel sheet pile cofferdam stabilizing system;
the steel sheet pile cofferdam stabilizing system comprises a steel pile casing, a transverse support, a longitudinal support, a balance sand bag, a winch and a lifting platform, wherein the transverse support and the longitudinal support are arranged at the top of the cofferdam; the cofferdam is formed by assembling Larsen steel sheet piles, and four corners of the cofferdam are folded through special-shaped steel sheet piles;
the steel sheet pile cofferdam guide frame comprises an inner guide frame, an outer guide frame and a guide frame support system, wherein the guide frame support system supports the guide frame, the guide frame is divided into the inner guide frame and the outer guide frame, and inner layer slideways are arranged on the opposite sides of the inner guide frame and the outer guide frame; the guide frame comprises a positioning clamp, universal wheels, a connecting plate, a cylindrical rod and a cylindrical slide way, the universal wheels are arranged below the positioning clamp, the positioning clamp is connected with the cylindrical rod through the connecting plate, the cylindrical slide way is arranged on the inner side of the cylindrical rod, and the positioning clamp slides on the inner-layer slide way of the guide frame; the guide frame support system comprises a triangular support fixed on the steel casing and a guide support frame positioned at the bottom of the guide frame;
the temporary pouring platform for the steel sheet pile cofferdam comprises a fixed slide rail, a pouring platform and a pouring device; the fixed slide rail is fixed at the top of the steel casing, the pouring platform is fixed on the fixed slide rail, the pouring device is placed on the pouring platform, the pouring platform slides on the fixed slide rail, and the pouring device slides on the pouring platform.
Preferably, the method comprises the following steps: the Larsen steel plate piles are connected through joints, special-shaped steel plate piles are arranged among the Larsen steel plate piles at the folding position, and the special-shaped steel plate piles are connected with the Larsen steel plate piles through the joints; the guide platform is connected through the inclined support.
Preferably, the method comprises the following steps: the balance sand bag is connected with a lifting rope, and one end of the lifting rope is connected with a winch; the lifting platform consists of a winch track and a lifting port, and the lifting rope penetrates out of the lifting port.
Preferably, the method comprises the following steps: the triangular supports comprise supporting plates, inclined struts and protective cylinder connecting plates, the protective cylinder connecting plates are welded on the steel protective cylinders, the supporting plates are arranged on the protective cylinder connecting plates, and the inclined struts are welded between the protective cylinder connecting plates and the supporting plates.
Preferably, the method comprises the following steps: the guide support frame is composed of a support platform, a vertical support and a cross brace.
Preferably, the method comprises the following steps: the outer side of the positioning fixture is provided with a guide sharp rib, the Larsen steel sheet pile is placed along the guide sharp rib, and the Larsen steel sheet pile is matched with the guide sharp rib.
Preferably, the method comprises the following steps: a sliding rail reserved groove is reserved at the bottom of the pouring platform, a platform sliding wheel is arranged at the top of the sliding rail reserved groove, and the sliding rail is fixed by the platform sliding wheel in an embedded mode.
Preferably, the method comprises the following steps: the pouring device arranged on the pouring platform comprises a pouring hopper, a sliding wheel, a pouring pipe and a sealing bottom plate, the sealing bottom plate is connected to the bottom of the pouring pipe through a bolt, and a splice plate and a screw hole are arranged at the joint; the upper end of the pouring pipe is connected with a pouring hopper, and the lower part of the pouring hopper is provided with a sliding wheel; the pouring pipe and the sliding wheel are matched with a pouring pipe slideway of the pouring platform.
The construction method of the steel sheet pile cofferdam comprises the following steps:
1) prefabricating a steel protective cylinder; prefabricating a steel casing, and welding a triangular support on the steel casing with a part of supporting function for supporting the guide frame;
2) constructing a steel casing; hoisting the steel casing to a construction site by using a crane;
3) placing a guide frame; vertical supports are arranged at corresponding positions of the guide frame and are formed by splicing steel pipes, and cross braces are arranged on the adjacent steel pipes; then placing the inner guide frame and the outer guide frame on the supporting platform and the triangular supports;
4) constructing an inclined support; an inclined support is arranged on the adjacent guide frame, so that the two guide platforms are connected together;
5) constructing a cofferdam; lifting the Larsen steel plate pile to a position corresponding to the inner guide frame and the outer guide frame by using a crane, then sliding a positioning fixture on the guide frame, enabling the Larsen steel plate pile to slide downwards along a guide pointed rib on the positioning fixture, after the construction of the Larsen steel plate pile is completed, pushing a cylindrical rod on the positioning fixture to a cylindrical slideway, enabling the positioning fixture to retract inwards, separating from the Larsen steel plate pile, then moving to the next position, outwards pushing the cylindrical rod out to expose the positioning fixture, and carrying out the construction of the next Larsen steel plate pile;
6) constructing a pouring platform; fixing the fixed slide rails on the steel casing at the two end parts, and then embedding the slide rail preformed grooves of the pouring platform with the fixed slide rails to splice the fixed slide rails and the slide rail preformed grooves together;
7) installing a pouring device; a crane is used for lowering the pouring device along a pouring pipe slideway on the pouring platform, so that the pouring hopper is clamped on the pouring platform, and then the sealing bottom plate is connected to the bottom of the pouring pipe;
8) sealing the bottom; pouring concrete at the bottom of the field along a pouring hopper and a pouring pipe;
9) carrying out longitudinal and transverse support construction; arranging longitudinal and transverse supports at the top of the cofferdam;
10) construction of a balanced sand bag; and placing a lifting platform at the top of the guide frame, placing a winch on the lifting platform, placing balance sand bags on two sides of the cofferdam by using the winch, and controlling the balance sand bags to lift or descend by using the winch.
The invention has the beneficial effects that:
(1) the invention places the sand bags on the two sides of the cofferdam to improve the shock resistance of the cofferdam, and controls the rising and falling of the sand bags by the winch, thereby not only improving the shock resistance, but also being convenient for recovery.
(2) According to the cofferdam construction method, the fixed slide rail is fixed at the top of the steel casing, the pouring platform is embedded with the fixed slide rail, the platform sliding wheel is arranged on the platform, the pouring platform can slide along the fixed slide rail, in addition, the pouring device can slide along the pouring pipe slide way on the pouring platform, and finally, the bottom sealing range can cover the whole cofferdam field.
(3) The invention designs the steel sheet pile guide frame, the steel sheet pile can be placed down along the positioning fixture on the guide frame, the positioning fixture can ensure the verticality of the steel sheet pile, and the construction process is simplified.
Drawings
FIG. 1 is an overall top view of a steel sheet pile cofferdam;
FIG. 2 is a schematic view of the steel sheet pile cofferdam stabilization system of FIG. 1;
FIG. 3 is a detail view at A in FIG. 2;
FIG. 4 is a detail view at B of FIG. 2;
fig. 5 is a schematic view of the profiled steel sheet pile of fig. 3;
FIG. 6 is a cross-sectional view A-A of FIG. 2;
fig. 7 is a schematic view of a cofferdam guide frame of the steel sheet pile in fig. 1;
FIG. 8 is a top view of the guide frame of FIG. 7;
FIG. 9 is a front view of the guide frame of FIG. 7;
FIG. 10 is a side view of the guide frame of FIG. 7;
FIG. 11 is a sectional view taken along line B-B of FIG. 7;
fig. 12 is a schematic view of a temporary pouring platform of the steel sheet pile cofferdam in fig. 1;
FIG. 13 is a cross-sectional view C-C of FIG. 12;
FIG. 14 is a schematic view of the casting apparatus of FIG. 12;
fig. 15 is a detail view at C in fig. 14.
Description of reference numerals: 1-Larsen steel sheet pile; 2-special-shaped steel sheet piles; 3-a joint; 4-steel casing; 5, obliquely supporting; 6, transverse supporting; 7, longitudinal support; 8, a guide platform; 9-a guiding support frame; 10-lifting rope; 11-lifting the platform; 12-lifting port; 13-balancing the sand bag; 14-a winch; 15-a support plate; 16-outer guide frame; 17-inner guide frame; 18-inner layer slide; 19-positioning the fixture; 20-universal wheel; 21-connecting plate; 22-a cylindrical rod; 23-a cylindrical slide; 24-vertical support; 25-a cross brace; 26-a support platform; 27-fixing a slide rail; 28-pouring hopper; 29, pouring a platform; 30-pouring a pipe slideway; 31, pouring a pipe; 32-a riding wheel; 33-a slide rail preformed groove; 34-a screw hole; 35-splice plate; 36-cofferdam; 37-diagonal bracing; 38-pile casing connecting plate; 39-guide sharp rib; 40-a winch track; 41-sealing the bottom plate; 42-platform gliding wheel.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The steel sheet pile cofferdam comprises a steel sheet pile cofferdam guide frame, a temporary pouring platform of the steel sheet pile cofferdam and a steel sheet pile cofferdam stabilizing system;
the steel sheet pile cofferdam stabilizing system comprises a steel pile casing 4, a transverse support 6, a longitudinal support 7, a balance sand bag 13, a winch 14 and a lifting platform 11, wherein the transverse support 6 and the longitudinal support 7 are arranged at the top of the cofferdam, the steel pile casing 4 is arranged below the longitudinal and transverse supports, triangular supports are arranged on the steel pile casing 4 at the periphery, a guide platform 8 is arranged on each triangular support, the lifting platform 11 is arranged at the top of the guide platform 8, the winch 14 is placed on the lifting platform 11, and the balance sand bag 13 is placed on two sides of the cofferdam 36 by the winch 14 through the lifting platform 11, so that the impact resistance of the cofferdam is improved, and the stability of the cofferdam is improved; the cofferdam is formed by assembling Larsen steel sheet piles 1, and four corners of the cofferdam are folded through special-shaped steel sheet piles 2;
the steel sheet pile cofferdam guide frame comprises an inner guide frame 17, an outer guide frame 16 and a guide frame support system, wherein the guide frame support system is supported by the guide frame, the guide frame is divided into the inner guide frame 17 and the outer guide frame 16, and inner layer slideways 18 are arranged on one sides of the inner guide frame 17 opposite to one sides of the outer guide frame 16; the guide frame comprises a positioning clamp 19, a universal wheel 20, a connecting plate 21, a cylindrical rod 22 and a cylindrical slideway 23, the universal wheel 20 is arranged below the positioning clamp 19, the positioning clamp 19 is connected with the cylindrical rod 22 through the connecting plate 21, the cylindrical slideway 23 is arranged on the inner side of the cylindrical rod 22, and the positioning clamp 19 slides on the inner-layer slideway 18 of the guide frame; the guide frame support system comprises a triangular support fixed on the steel casing 4 and a guide support frame 9 positioned at the bottom of the guide frame;
the temporary pouring platform for the steel sheet pile cofferdam comprises a fixed slide rail 27, a pouring platform 29 and a pouring device; the fixed slide rail 27 is fixed to the top of the steel casing 4, the pouring platform 29 is fixed to the fixed slide rail 27, the pouring device is placed on the pouring platform 29, the pouring platform 29 slides on the fixed slide rail 27, and the pouring device slides on the pouring platform 29, so that the pouring range of the temporary pouring platform can cover the whole cofferdam.
The Larsen steel sheet piles 1 are connected through joints 3, special-shaped steel sheet piles 2 are arranged among the Larsen steel sheet piles 1 at the folding position, and the special-shaped steel sheet piles 2 are connected with the Larsen steel sheet piles 1 through the joints 3; the guide platform 8 is connected through the inclined support 5, and the stability of the guide platform 8 is improved.
A lifting rope 10 is connected to the balance sand bag 13, and one end of the lifting rope 10 is connected with a winch 14; the lifting platform 11 consists of a winch track 40 and a lifting opening 12, and the lifting rope 10 penetrates out of the lifting opening 12.
The triangular support comprises a support plate 15, an inclined strut 37 and a pile casing connecting plate 38, the pile casing connecting plate 38 is welded on the steel pile casing 4, the support plate 15 is arranged on the pile casing connecting plate 38, and the inclined strut 37 is welded between the pile casing connecting plate 38 and the support plate 15.
The guiding and supporting frame 9 is composed of a supporting platform 26, a vertical support 24 and a cross brace 25.
The outer side of the positioning fixture 19 is provided with a guide sharp rib 39, the Larsen steel sheet pile 1 is placed along the guide sharp rib 39, and the Larsen steel sheet pile 1 is matched with the guide sharp rib 39.
A sliding rail reserved groove 33 is reserved at the bottom of the pouring platform 29, a platform sliding wheel 42 is arranged at the top of the sliding rail reserved groove 33, and the sliding rail 27 is fixed by the platform sliding wheel 42 in an embedded mode.
The pouring device arranged on the pouring platform 29 comprises a pouring hopper 28, a sliding wheel 32, a pouring pipe 31 and a sealing bottom plate 41, the sealing bottom plate 41 is connected to the bottom of the pouring pipe 31 through bolts, and a splice plate 35 and a screw hole 34 are arranged at the joint of the sealing bottom plate and the pouring pipe, so that the horizontal bottom sealing of poured concrete can be ensured; the upper end of the pouring pipe 31 is connected with a pouring hopper 28, and the lower part of the pouring hopper 28 is provided with a sliding wheel 32; the pour tube 31 and the runner wheel 32 cooperate with a pour tube slide 30 of the pour platform 29.
The construction method of the steel sheet pile cofferdam comprises the following steps:
1) prefabricating a steel protective cylinder 4; prefabricating a steel casing 4, and welding a triangular support on the steel casing with a part of supporting function for supporting a guide frame;
2) constructing a steel casing 4; hoisting the steel casing 4 to a construction site by using a crane, wherein the position of the steel casing 4 is required to correspond to a design scheme;
3) placing a guide frame; vertical supports 24 are arranged at corresponding positions of the guide frame, the vertical supports 24 are formed by splicing steel pipes, and cross braces 25 are arranged on the adjacent steel pipes; then the inner guide frame 17 and the outer guide frame 16 are placed on the supporting platform 26 and the triangular supports;
4) constructing an inclined support 5; an inclined support 5 is arranged on the adjacent guide frame, so that the two guide platforms 8 are connected together;
5) constructing a cofferdam 36; lifting the Larsen steel plate pile 1 to a position corresponding to the inner guide frame and the outer guide frame by using a crane, then sliding a positioning clamp 19 on the guide frame, enabling the Larsen steel plate pile 1 to slide downwards along a guide sharp rib 39 on the positioning clamp 19, after the construction of the Larsen steel plate pile 1 is completed, pushing a cylindrical rod 22 on the positioning clamp 19 to a cylindrical slideway 23, enabling the positioning clamp 19 to retract inwards, separating from the Larsen steel plate pile 1, then moving to a next position, pushing the cylindrical rod 22 outwards to expose the positioning clamp 19, and carrying out the construction of the next Larsen steel plate pile 1;
6) constructing a pouring platform 29; fixing the fixed slide rail 27 on the steel casing 4 at the two end parts, and then embedding the slide rail preformed groove 33 of the pouring platform 29 with the fixed slide rail 27 to splice the two together;
7) installing a pouring device; lowering the pouring device along the pouring pipe slide 30 on the pouring platform 29 by using a crane to clamp the pouring hopper 28 on the pouring platform 29, and then connecting the bottom sealing plate 41 to the bottom of the pouring pipe 31;
8) sealing the bottom; pouring concrete at the bottom of the site along the pouring hopper 28 and the pouring pipe 31;
9) carrying out longitudinal and transverse support construction; longitudinal and transverse supports are arranged at the top of the cofferdam 36 to improve the stability of the cofferdam 36;
10) constructing a balance sand bag 13; a hoisting platform 11 is placed on the top of the guide frame, a winch 14 is placed on the hoisting platform 11, balance sand bags 13 are placed on two sides of the cofferdam 36 through the winch 14, and the hoisting or descending of the balance sand bags 13 is controlled by the winch 14.
Claims (9)
1. A steel sheet pile cofferdam is characterized by comprising a steel sheet pile cofferdam guide frame, a temporary pouring platform of the steel sheet pile cofferdam and a steel sheet pile cofferdam stabilizing system;
the steel sheet pile cofferdam stabilizing system comprises steel pile casings (4), transverse supports (6), longitudinal supports (7), balance sand bags (13), a winch (14) and a lifting platform (11), wherein the transverse supports (6) and the longitudinal supports (7) are arranged at the top of the cofferdam, the steel pile casings (4) are arranged below the longitudinal and transverse supports, triangular supports are arranged on the steel pile casings (4) at the peripheral edges, guide platforms (8) are arranged on the triangular supports, the lifting platform (11) is arranged at the top of the guide platforms (8), the winch (14) is placed on the lifting platform (11), and the balance sand bags (13) are placed on two sides of the cofferdam (36) by the winch (14) through the lifting platform (11); the cofferdam is formed by assembling Larsen steel sheet piles (1), and four corners of the cofferdam are folded through special-shaped steel sheet piles (2);
the steel sheet pile cofferdam guide frame comprises an inner guide frame (17), an outer guide frame (16) and a guide frame support system, wherein the guide frame is supported on the guide frame support system and is divided into the inner guide frame (17) and the outer guide frame (16), and inner layer slideways (18) are arranged on one sides of the inner guide frame (17) opposite to one sides of the outer guide frame (16); the guide frame comprises a positioning clamp (19), a universal wheel (20), a connecting plate (21), a cylindrical rod (22) and a cylindrical slide way (23), the universal wheel (20) is arranged below the positioning clamp (19), the positioning clamp (19) is connected with the cylindrical rod (22) through the connecting plate (21), the cylindrical slide way (23) is arranged on the inner side of the cylindrical rod (22), and the positioning clamp (19) slides on the inner layer slide way (18) of the guide frame; the guide frame support system comprises a triangular support fixed on the steel casing (4) and a guide support frame (9) positioned at the bottom of the guide frame;
the temporary pouring platform for the steel sheet pile cofferdam comprises a fixed slide rail (27), a pouring platform (29) and a pouring device; the fixed slide rail (27) is fixed at the top of the steel casing (4), the pouring platform (29) is fixed on the fixed slide rail (27), the pouring device is placed on the pouring platform (29), the pouring platform (29) slides on the fixed slide rail (27), and the pouring device slides on the pouring platform (29).
2. The steel sheet pile cofferdam of claim 1, wherein Larsen steel sheet piles (1) are connected by joints (3), deformed steel sheet piles (2) are arranged between Larsen steel sheet piles (1) at the closure, and the deformed steel sheet piles (2) are connected with the Larsen steel sheet piles (1) by the joints (3); the guide platforms (8) are connected through inclined supports (5).
3. The steel sheet pile cofferdam of claim 1, wherein the balancing sand bag (13) is connected with a lifting rope (10), one end of the lifting rope (10) is connected with a hoist (14); the lifting platform (11) consists of a winch track (40) and a lifting port (12), and the lifting rope (10) penetrates out of the lifting port (12).
4. The steel sheet pile cofferdam of claim 1, wherein the triangular supports comprise support plates (15), diagonal braces (37) and pile casing connecting plates (38), the pile casing connecting plates (38) are welded on the steel pile casings (4), the support plates (15) are arranged on the pile casing connecting plates (38), and the diagonal braces (37) are welded between the pile casing connecting plates (38) and the support plates (15).
5. Steel sheet pile cofferdam according to claim 1, characterized in that the guiding bracing frames (9) consist of bracing platforms (26), vertical braces (24) and cross braces (25).
6. Steel sheet pile cofferdam according to claim 1, characterized in that the positioning fixtures (19) are provided on their outer sides with guiding sharp ribs (39), along which the larsen steel sheet piles (1) are placed, the larsen steel sheet piles (1) cooperating with the guiding sharp ribs (39).
7. The steel sheet pile cofferdam of claim 1, wherein a slide rail pre-groove (33) is reserved at the bottom of the pouring platform (29), a platform sliding wheel (42) is arranged at the top of the slide rail pre-groove (33), and the slide rail (27) is fixed by the platform sliding wheel (42) in a jogged mode.
8. The steel sheet pile cofferdam of claim 1, wherein the pouring devices placed on the pouring platform (29) comprise pouring hoppers (28), sliding wheels (32), pouring pipes (31) and sealing plates (41), the sealing plates (41) are connected to the bottoms of the pouring pipes (31) through bolts, and splice plates (35) and screw holes (34) are arranged at the joints; the upper end of the pouring pipe (31) is connected with a pouring hopper (28), and the lower part of the pouring hopper (28) is provided with a sliding wheel (32); the pouring pipe (31) and the sliding wheel (32) are matched with a pouring pipe slide way (30) of the pouring platform (29).
9. The construction method of the steel sheet pile cofferdam of claim 1, characterized by comprising the steps of:
1) prefabricating a steel protective cylinder (4); prefabricating a steel protective cylinder (4), and welding a triangular support on the steel protective cylinder with a part of supporting functions for supporting a guide frame;
2) constructing a steel casing (4); hoisting the steel casing (4) to a construction site by using a crane;
3) placing a guide frame; vertical supports (24) are arranged at corresponding positions of the guide frame, the vertical supports (24) are formed by splicing steel pipes, and cross braces (25) are arranged on the adjacent steel pipes; then, the inner guide frame (17) and the outer guide frame (16) are placed on the supporting platform (26) and the triangular supports;
4) constructing an inclined support (5); an inclined support (5) is arranged on the adjacent guide frame, so that the two guide platforms (8) are connected together;
5) constructing a cofferdam (36); utilizing a crane to lift the Larsen steel plate pile (1) to a position corresponding to the inner guide frame and the outer guide frame, then sliding a positioning clamp (19) on the guide frame, enabling the Larsen steel plate pile (1) to slide downwards along a guide pointed rib (39) on the positioning clamp (19), after the construction of the Larsen steel plate pile (1) is completed, pushing a cylindrical rod (22) on the positioning clamp (19) to a cylindrical slideway (23), enabling the positioning clamp (19) to retract inwards, separating from the Larsen steel plate pile (1), then moving to the next position, pushing the cylindrical rod (22) outwards to expose the positioning clamp (19), and carrying out the construction of the next Larsen steel plate pile (1);
6) constructing a pouring platform (29); fixing a fixed slide rail (27) on the steel casing (4) at the two end parts, and then embedding a slide rail preformed groove (33) of the pouring platform (29) with the fixed slide rail (27) to splice the fixed slide rail (27) and the fixed slide rail together;
7) installing a pouring device; a crane is used for lowering the pouring device along a pouring pipe slide way (30) on a pouring platform (29), so that a pouring hopper (28) is clamped on the pouring platform (29), and then a sealing bottom plate (41) is connected to the bottom of a pouring pipe (31);
8) sealing the bottom; pouring concrete at the bottom of the field along a pouring hopper (28) and a pouring pipe (31);
9) carrying out longitudinal and transverse support construction; the top of the cofferdam (36) is provided with a longitudinal support and a transverse support;
10) constructing a balance sand bag (13); a hoisting platform (11) is placed at the top of the guide frame, a winch (14) is placed on the hoisting platform (11), balance sand bags (13) are placed on two sides of the cofferdam (36) through the winch (14), and the hoisting or descending of the balance sand bags (13) is controlled by the winch (14).
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| CN201811645414.4A CN109653225B (en) | 2018-12-30 | 2018-12-30 | Steel sheet pile cofferdam and construction method thereof |
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| CN110965556B (en) * | 2019-11-20 | 2021-04-27 | 中建桥梁有限公司 | Large-area underwater concrete pouring method |
| CN111691443B (en) * | 2020-06-22 | 2021-09-28 | 福建省华策建设集团有限公司 | Larsen steel sheet pile cofferdam and construction method thereof |
| CN114482077B (en) * | 2022-04-13 | 2022-06-28 | 三亚宏岩岩土工程有限公司 | Foundation ditch intelligence braced system with impervious effect of antidetonation |
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| US6231271B1 (en) * | 1999-04-05 | 2001-05-15 | Stab Cat, Inc | Apparatus and method for lifting piles |
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| US6231271B1 (en) * | 1999-04-05 | 2001-05-15 | Stab Cat, Inc | Apparatus and method for lifting piles |
| JP6132606B2 (en) * | 2013-03-14 | 2017-05-24 | 株式会社技研製作所 | Mounting method of clamp device in pile press-in device |
| CN106013192A (en) * | 2016-06-15 | 2016-10-12 | 中铁港航局集团有限公司 | Method of constructing cofferdam after integrally lowering multiple layers of inner bracings of steel sheet pile cofferdam |
| CN206359983U (en) * | 2017-01-04 | 2017-07-28 | 中建筑港集团有限公司 | One kind is used for steel plate sunk pile roller stopping means |
| CN208167737U (en) * | 2018-04-25 | 2018-11-30 | 江苏省交通工程集团有限公司 | A kind of U-shaped steel sheet pile pile sinking limiting device |
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| CN109653225A (en) | 2019-04-19 |
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