CN213741154U - Sea area steel sheet pile cofferdam of damp proof water - Google Patents
Sea area steel sheet pile cofferdam of damp proof water Download PDFInfo
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- CN213741154U CN213741154U CN202022650575.1U CN202022650575U CN213741154U CN 213741154 U CN213741154 U CN 213741154U CN 202022650575 U CN202022650575 U CN 202022650575U CN 213741154 U CN213741154 U CN 213741154U
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Abstract
The utility model provides a sea area steel sheet pile cofferdam of big damp-proof water, include the cofferdam body of keeping off the constitution by the four sides, it comprises end to end's steel sheet pile to enclose the fender, the hasp of two adjacent steel sheet piles is buckled mutually, be equipped with pile foundation steel casing in the steel sheet pile enclosed region, the relative two sides in position are enclosed and are kept off and respectively have at least one steel sheet pile to be the return water steel sheet pile, return water steel sheet pile is equipped with first through-hole and second through-hole from top to bottom, first layer wet return valve is installed to first through-hole department, the height and the maximum tide water level of first layer wet return valve are unanimous, second layer wet return valve is installed to second through-hole department, highly being higher than the riverbed face of second layer wet return valve. The utility model discloses set up a special return water steel sheet pile on the cofferdam, set up two-layer return water valve on the return water steel sheet pile, first layer return water valve mounting height is located the biggest tide level, and second floor return water valve height is located river bed face department, can ensure the security and the stability of cofferdam through the control of return water valve.
Description
Technical Field
The utility model relates to a sea area steel sheet pile cofferdam of preventing heavy tide water belongs to bridge steel sheet pile cofferdam construction technical field.
Background
With the increasing construction of sea-crossing bridges, the steel sheet pile cofferdam is widely used in sea construction as a foundation construction method. The construction condition is comparatively complicated in the morning and evening tides aquatic, and the sea water flows to the bank side direction during the tide rising, and the sea water keeps away from the bank side direction flow during the tide falling, and twice tide every day, the tide water is comparatively steady, and the construction is influenced by rising, falling water level greatly. When the steel sheet pile cofferdam is adopted to carry out foundation construction in the sea area tidal zone, the stress working condition of the steel sheet pile is changed due to tidal change, the water level of the cofferdam exceeds the maximum tide level due to the fact that the maximum tide of each month is accompanied by strong wind and strong waves, great potential safety hazards are caused to cofferdam safety, and therefore safety emergency measures of cofferdam construction become extremely important.
The existing treatment mode usually adopts a manual water pumping mode, needs additional water pumping equipment, needs personnel to operate on site in the tidal process, and has high safety risk and low efficiency.
Disclosure of Invention
In order to solve the prior art not enough, the utility model provides a prevent sea area steel sheet pile cofferdam of heavy tide water sets up a special return water steel sheet pile on the cofferdam, sets up two-layer return valve on the return water steel sheet pile, and first layer return valve mounting height is located the biggest tide water level, and second floor return valve highly is located river bed face department, can ensure the security and the stability of cofferdam through the control of return valve.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: the sea area steel sheet pile cofferdam for preventing the heavy tide water comprises a cofferdam body consisting of four side walls, wherein each wall consists of end-to-end steel sheet piles, lock catches of two adjacent steel sheet piles are buckled with each other, pile foundation steel protective sleeves are arranged in the areas surrounded by the steel sheet piles, two layers of ring beams are arranged on the inner walls of the steel sheet piles from top to bottom and respectively comprise a first layer of ring beams and a second layer of ring beams, a first layer of inner supports are erected on the first layer of ring beams, two ends of each first layer of inner support are respectively connected with adjacent edges of the first layer of inner supports, a second layer of inner supports are erected on the second layer of ring beams, two ends of each second layer of inner support are respectively connected with adjacent edges of the second layer of inner supports, at least one steel sheet pile is arranged on each wall at the opposite position and is a backwater steel sheet pile, a first through hole and a second through hole are arranged from top to bottom of the backwater steel sheet pile, a first layer of backwater valve is arranged at the first through hole, and the height of the first layer of the backwater valve is consistent with the maximum tide water level, and a second layer of water return valve is arranged at the second through hole, and the height of the second layer of water return valve is higher than the surface of the river bed.
And the first water return valve and the second water return valve are respectively welded and fixed with the first through hole and the second through hole.
The first layer of return water valve and the second floor of return water valve all overlap and are equipped with and protect a section of thick bamboo, protect a section of thick bamboo including the cover establish first ring flange and the second ring flange on first return water valve or second return water valve, wherein first ring flange is installed in the first through-hole or the second through-hole surface of return water steel sheet pile, through a set of bolt interconnect that becomes circular distribution between first ring flange and the second ring flange, the tip of bolt is equipped with fastening nut.
The backwater steel sheet pile is positioned on the enclosure of the short side in the enclosure of the four sides.
The pile foundation steel casing is distributed in a quincunx shape.
The first layer of ring beam is supported by a first layer of ring beam fixing bracket fixed at the lower part of the first layer of ring beam and connected with the inner wall of the steel sheet pile, and the second layer of ring beam is supported by a second layer of ring beam fixing bracket fixed at the lower part of the second layer of ring beam and connected with the inner wall of the steel sheet pile.
And a bearing platform inside the steel sheet pile is positioned on the bottom-sealed concrete layer.
The utility model discloses based on the beneficial effect that its technical scheme had lies in:
(1) the utility model provides a sea area steel sheet pile cofferdam of preventing heavy tide sets up a special return water steel sheet pile on the cofferdam, sets up two-layer return water valve on the return water steel sheet pile, and first layer return water valve mounting height is located the maximum tide level, and second layer return water valve height is located river bed face department, can guarantee the security and the stability of cofferdam through the control of return water valve;
(2) the utility model provides a backwater valve of sea area steel sheet pile cofferdam of preventing heavy tide water can be equipped with a pile casing, can avoid the backwater valve from the steel sheet pile, strengthen the unity of backwater valve and steel sheet pile, thus improve the damp attack resistance ability of steel sheet pile cofferdam;
(3) the utility model provides a pair of prevent sea area steel sheet pile cofferdam of heavy tide water return water steel sheet pile lie in the four sides and enclose and keep off in the periphery that lies in the minor face on, can make steel sheet pile cofferdam tidal surge resistance ability maximize at the morning and evening tides in-process.
Drawings
Fig. 1 is a schematic structural view of the front side of a steel sheet pile cofferdam.
Fig. 2 is a schematic plane structure diagram of an inner support system in a first layer of the steel sheet pile cofferdam.
FIG. 3 is a schematic view of a steel sheet pile installed with a water return valve.
FIG. 4 is a schematic plan view of a steel sheet pile with a water return valve.
In the figure: 1-steel sheet pile, 2-first layer of water return valve, 3-first layer of ring beam, 4-second layer of ring beam, 5-second layer of water return valve, 61-first flange plate, 62-bolt, 63-second flange plate, 64-fastening nut, 7-bearing platform, 8-back cover concrete layer and 9-pile foundation steel casing.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The utility model provides a sea area steel sheet pile cofferdam for preventing heavy tide water, which comprises a cofferdam body consisting of four side walls, wherein each wall consists of end-to-end steel sheet piles 1, the lock catches of two adjacent steel sheet piles are buckled, a pile foundation steel casing 9 is arranged in the area surrounded by the steel sheet piles, the inner wall of each steel sheet pile is provided with two layers of ring beams from top to bottom, namely a first layer of ring beam 3 and a second layer of ring beam 4, a first layer of inner support is erected on the first layer of ring beam, two ends of the first layer of inner support are respectively connected with adjacent edges of the first layer of inner support, a second layer of inner support is erected on the second layer of ring beam, two ends of the second layer of inner support are respectively connected with adjacent edges of the second layer of inner support, at least one steel sheet pile is a steel sheet pile on two opposite side walls, a first through hole and a second through hole are arranged on the backwater steel sheet pile from top to bottom, a first layer of backwater valve 2 is arranged at the first through hole, the height of the first layer of water return valve is consistent with the maximum tide level, the second layer of water return valve 5 is installed at the second through hole, and the height of the second layer of water return valve is higher than the surface of the river bed.
And the first water return valve and the second water return valve are respectively welded and fixed with the first through hole and the second through hole.
The first layer of return water valve and the second floor of return water valve all overlap and are equipped with and protect a section of thick bamboo, protect a section of thick bamboo including the cover establish first ring flange 61 and the second ring flange 63 on first return water valve or the second return water valve, wherein first ring flange is installed in the first through-hole of return water steel sheet pile or second through-hole surface, through a set of bolt 62 interconnect that becomes circular distribution between first ring flange and the second ring flange, the tip of bolt is equipped with fastening nut 64.
The backwater steel sheet pile is positioned on the enclosure of the short side in the enclosure of the four sides.
The pile foundation steel casing is distributed in a quincunx shape.
The first layer of ring beam is supported by a first layer of ring beam fixing bracket fixed at the lower part of the first layer of ring beam and connected with the inner wall of the steel sheet pile, and the second layer of ring beam is supported by a second layer of ring beam fixing bracket fixed at the lower part of the second layer of ring beam and connected with the inner wall of the steel sheet pile.
And a bearing platform 7 inside the steel sheet pile is positioned on the bottom-sealed concrete layer 8.
In this embodiment, the cofferdam is constructed by the following process:
(1) investigation according to geological and hydrological conditions: when the cofferdam inner support system elevation is designed, the elevation of the top of the steel plate pile is +6.5m, the inner support system of the first layer is controlled to be 0.5m below the maximum water level, and the elevation is +5 m; the elevation of the support system in the second layer is controlled to be 0.5m above the top surface of the bearing platform, and the elevation is +1.5 m; the distance between the first layer and the second layer is 3.5m, and is controlled within 4m, so that the structural design is most reasonable;
(2) installing a first inner ring beam: installing a bracket on a pile foundation casing, then placing a double-spelling worker 56a of a short side and a long side of a first layer ring beam on the bracket to form a square structural system, wherein the first layer ring beam is used as a guide frame during the inserting and striking of a steel sheet pile and assists a limiting tool to control the plane size and the verticality of the steel sheet pile;
(3) inserting, beating and closing steel sheet piles: temporary limiting measures are set during the rising and falling tide period, so that the perpendicularity of inserting and driving the steel sheet piles is ensured;
(4) installing an inner support system: cutting off the pile foundation steel pile casings to the riverbed surface at a low tide level, and then installing a first layer of inner supports, a second layer of ring beams and a second layer of inner support system, wherein the first layer of inner supports and the second layer of inner supports adopt phi 630 x 8mm steel pipe piles, and the first layer of ring beams and the second layer of ring beams adopt a double-splicing tool 56a, so that the cofferdam construction work is completed;
(5) two holes are respectively formed in the short edge direction of the steel sheet pile cofferdam before the cofferdam is excavated, two water return valves are installed, and 4 water return valves are arranged on each layer; the mounting height of the first layer of water return valve is positioned at the maximum tide level, the mounting height of the second layer of water return valve is positioned at the surface of the river bed, and the safety and the stability of the cofferdam are ensured by the control of the water valve;
(6) the geology of the cofferdam is impervious in a hard soil layer, water is pumped and then is sealed in a dry mode when the water level is stable, the first layer of water return valve is kept opened in the processes of excavation and bottom sealing, the second layer of water return valve is closed, the opening and closing of the water return valve are controlled through a water return valve handle, if the water level of a large tide is higher than that of the first layer of water return valve, seawater can be refilled into the cofferdam, and the stability of the water levels inside and outside the cofferdam and the stress stability of the cofferdam are guaranteed; meanwhile, the second layer of water return valve is kept open, and the balance of the water level inside and outside the cofferdam after the moisture subsides is ensured to be consistent.
The utility model provides a pair of prevent sea area steel sheet pile cofferdam of heavy tide water sets up a special return water steel sheet pile on the cofferdam, sets up two-layer return water valve on the return water steel sheet pile, and first layer return water valve mounting height is located maximum tide level, and second floor return water valve height is located river bed face department, can ensure the security and the stability of cofferdam through the control of return water valve.
Claims (7)
1. The utility model provides a sea area steel sheet pile cofferdam of damp proof water, includes the cofferdam body of enclosing the fender component by the four sides, its characterized in that: the enclosure is composed of steel sheet piles connected end to end, the lock catches of two adjacent steel sheet piles are buckled with each other, a pile foundation steel casing is arranged in an area enclosed by the steel sheet piles, two layers of ring beams are arranged on the inner walls of the steel sheet piles from top to bottom and are respectively a first layer ring beam and a second layer ring beam, a first layer inner support is erected on the first layer ring beam, two ends of the first layer inner support are respectively connected with adjacent edges of the first layer inner support, a second layer inner support is erected on the second layer ring beam, two ends of the second layer inner support are respectively connected with adjacent edges of the second layer inner support, at least one steel sheet pile is arranged on the two opposite side enclosures in the opposite position and is a backwater steel sheet pile, the backwater steel sheet pile is provided with a first through hole and a second through hole from top to bottom, a first layer backwater valve is arranged at the first through hole, the height of the first layer backwater valve is consistent with the maximum tide level, a second layer backwater valve is arranged at the second through hole, and the height of the second layer backwater valve is higher than the bed surface.
2. The tidal water resistant sea area steel sheet pile cofferdam of claim 1, wherein: and the first water return valve and the second water return valve are respectively welded and fixed with the first through hole and the second through hole.
3. The tidal water resistant sea area steel sheet pile cofferdam of claim 1, wherein: the first layer of return water valve and the second floor of return water valve all overlap and are equipped with and protect a section of thick bamboo, protect a section of thick bamboo including the cover establish first ring flange and the second ring flange on first return water valve or second return water valve, wherein first ring flange is installed in the first through-hole or the second through-hole surface of return water steel sheet pile, through a set of bolt interconnect that becomes circular distribution between first ring flange and the second ring flange, the tip of bolt is equipped with fastening nut.
4. The tidal water resistant sea area steel sheet pile cofferdam of claim 1, wherein: the backwater steel sheet pile is positioned on the enclosure of the short side in the enclosure of the four sides.
5. The tidal water resistant sea area steel sheet pile cofferdam of claim 1, wherein: the pile foundation steel casing is distributed in a quincunx shape.
6. The tidal water resistant sea area steel sheet pile cofferdam of claim 1, wherein: the first layer of ring beam is supported by a first layer of ring beam fixing bracket fixed at the lower part of the first layer of ring beam and connected with the inner wall of the steel sheet pile, and the second layer of ring beam is supported by a second layer of ring beam fixing bracket fixed at the lower part of the second layer of ring beam and connected with the inner wall of the steel sheet pile.
7. The tidal water resistant sea area steel sheet pile cofferdam of claim 1, wherein: and a bearing platform inside the steel sheet pile is positioned on the bottom-sealed concrete layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022650575.1U CN213741154U (en) | 2020-11-17 | 2020-11-17 | Sea area steel sheet pile cofferdam of damp proof water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022650575.1U CN213741154U (en) | 2020-11-17 | 2020-11-17 | Sea area steel sheet pile cofferdam of damp proof water |
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| Publication Number | Publication Date |
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| CN213741154U true CN213741154U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022650575.1U Active CN213741154U (en) | 2020-11-17 | 2020-11-17 | Sea area steel sheet pile cofferdam of damp proof water |
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- 2020-11-17 CN CN202022650575.1U patent/CN213741154U/en active Active
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