CN213296396U - Steel sheet pile cofferdam for tidal zone of sea area - Google Patents
Steel sheet pile cofferdam for tidal zone of sea area Download PDFInfo
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- CN213296396U CN213296396U CN202021139266.1U CN202021139266U CN213296396U CN 213296396 U CN213296396 U CN 213296396U CN 202021139266 U CN202021139266 U CN 202021139266U CN 213296396 U CN213296396 U CN 213296396U
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Abstract
The invention provides a steel sheet pile cofferdam for a tidal zone of a sea area, which comprises steel sheet piles enclosed by four sides, wherein locking notches of two adjacent steel sheet piles are buckled, pile foundation steel guard cylinders which are constructed are arranged in the area enclosed by the steel sheet piles, a foam adhesive layer is sprayed on the outer sides of the locking notches of the adjacent steel sheet piles, the inner sides of the locking notches of the adjacent steel sheet piles are filled with a mixture of cotton wool and bar planting adhesive, fine sand is filled in a gap between the locking notches of the adjacent steel sheet piles, a group of pile foundation steel guard cylinders are inserted into a base in the area enclosed by the steel sheet piles, and two layers of ring beams are arranged on the inner walls of the steel sheet piles. The inner support system of the utility model can reduce the elevation of the inner support system as much as possible through low tide level installation, so that the cofferdam structure design is more reasonable; the cofferdam leakage stoppage adopts a triple combination method, so that the water stopping effect of the cofferdam under the influence of sea area tide changes is ensured; the cofferdam bottom sealing is dry sealed by low water tide level water pumping, and a layer of bamboo plywood is laid on the substrate, so that the slurry is prevented from turning during bottom sealing, the thickness of the bottom sealing is effectively ensured, and the quality of the bottom sealing is ensured.
Description
Technical Field
The utility model relates to a sea area morning and evening tides district steel sheet pile cofferdam belongs to bridge steel sheet pile cofferdam construction technical field.
Background
With the vigorous development of the construction of highway networks in China, the construction of bridges across rivers and sea is increasingly increased, and the foundation construction is taken as a key control link in the construction and is directly related to the progress of engineering construction. The steel sheet pile cofferdam as one foundation construction method has the advantages of high waterproof performance, high section bending resistance, being suitable for various soil layers, etc. the cofferdam in various shapes may be formed in site construction according to the foundation form, and the material may be turned over.
The steel sheet pile cofferdam structure is adopted to carry out deep water foundation construction in a sea beach area or a shallow sea area, and the construction working condition is complex, the safety risk is high, the uncontrollable factors are many, and the steel sheet pile cofferdam in the sea area is not summarized and popularized in the traditional construction. The following problems mainly exist in the current construction: influence of sea tide is not considered in the design, so that the cofferdam structure is relatively unreasonable in design and high in construction cost; the cofferdam is affected by the erosion of tide, the fine sand filled in the locking notch is lost, and the water-stopping effect is poor; the cofferdam is positioned on a silt layer, and the thickness of the bottom cover cannot be ensured due to slurry turning during bottom cover.
Disclosure of Invention
In order to solve the defects of the prior art, the utility model provides a steel sheet pile cofferdam in the tidal area of the sea area, which reduces the elevation of an inner support system as much as possible by installing the inner support system at a low tide level, so that the structural design of the cofferdam is more reasonable; the cofferdam leakage stoppage adopts a triple combination method, so that the water stopping effect of the cofferdam under the influence of sea area tide changes is ensured; the cofferdam bottom sealing is dry sealed by low water tide level water pumping, and a layer of bamboo plywood is laid on the substrate, so that the slurry is prevented from turning during bottom sealing, the thickness of the bottom sealing is effectively ensured, and the quality of the bottom sealing is ensured.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: the sea area tidal area steel sheet pile cofferdam comprises steel sheet piles surrounded by four sides, locking notches of two adjacent steel sheet piles are buckled, pile foundation steel casing barrels are arranged in the region surrounded by the steel sheet piles, a foam glue layer is sprayed on the outer sides of the locking notches of the adjacent steel sheet piles, the inner sides of the locking notches of the adjacent steel sheet piles are filled with a mixture of cotton wool and bar planting glue, fine sand is filled in a gap between the locking notches of the adjacent 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 of ring beams and a second layer of ring beams, wherein the first layer of ring beams are supported by a first layer of ring beam fixed bracket fixed on the lower portion of the first layer of ring beams and connected with the inner walls of the steel sheet piles, a first layer of ring beams is supported by a second layer of ring beam fixed bracket fixed on the lower portion of the second layer of ring beams and connected with the inner walls of the steel sheet piles, a first layer of inner supports are erected on, the second layer of ring beam is erected with a second layer of inner support, and two ends of the second layer of inner support are respectively connected with adjacent edges of the second layer of inner support.
The pile foundation steel casing is distributed in a quincunx shape.
The base comprises a clay base layer, a bamboo plywood layer and a bottom sealing concrete layer from bottom to top.
And a temporary bracket for recycling is hung on the pile foundation steel casing.
The interim bracket of recycling includes upper ring and the below ring that from top to bottom set up on stand and the stand, the leading flank of below ring is equipped with first horizontal pole, the leading flank of upper ring is equipped with the first down tube that lower extreme and first horizontal pole are connected, first horizontal pole, first down tube and stand form the triangle-shaped structure, the lower surface of below ring is equipped with the dog, be equipped with the second down tube between dog and the first horizontal pole, the second down tube, first horizontal pole and dog form the triangle-shaped structure, the trailing flank of stand is equipped with a bottom sprag beam, be equipped with the third down tube between a bottom sprag beam and the pole setting, a bottom sprag beam, pole setting and third down tube form the triangle-shaped structure.
The upper ring and the lower ring are fixed on the stand column through fastening bolts respectively, and the side wall of the stand column is provided with a scale.
The top of stand is equipped with the end baffle, has seted up the hole for hoist on the end baffle.
The utility model discloses based on the beneficial effect that its technical scheme had lies in:
(1) the steel sheet pile cofferdam in the tidal area of the sea area provided by the utility model utilizes the low tide level to install the inner support system, and the elevation of the inner support system is reduced as much as possible, so that the structural design of the cofferdam is more reasonable;
(3) the cofferdam leakage stoppage of the steel sheet pile cofferdam in the tidal zone of the sea area provided by the utility model adopts three combination methods, thereby ensuring the water stopping effect of the cofferdam under the influence of tidal change of the sea area;
(4) the utility model provides a sea area tidal zone steel sheet pile cofferdam, the back cover adopts low water tide level water pumping dry seal, lays a layer of bamboo plywood on the basement, prevents to turn over thick liquid when the back cover, has guaranteed back cover thickness effectively, has guaranteed the back cover quality;
(5) the utility model provides a sea area tidal region steel sheet pile cofferdam which adopts a temporary bracket capable of being turned around, is hung on a pile foundation steel casing wall body and is used for placing and fixing inner ring beams of the cofferdam, and can be turned around and recycled in time after the fixed bracket is installed;
(6) the utility model provides a pair of sea area morning and evening tides district steel sheet pile cofferdam structure construction safety is convenient, can effectively prevent to turn over the thick liquid, has ensured construction quality.
Drawings
Fig. 1 is a schematic view of the front structure of a steel sheet pile cofferdam in the construction process.
Fig. 2 is a schematic side structure view of a steel sheet pile cofferdam in the construction process.
Fig. 3 is a schematic plan view of the support architecture in the first layer.
FIG. 4 is a schematic plan view of the support system in the second layer.
Fig. 5 is a big picture of a steel sheet pile ring beam fixing bracket.
Fig. 6 is a schematic view of locking closure of a steel sheet pile.
Fig. 7 is a schematic structural diagram of the temporary corbel which is recycled.
In the figure: 1-steel sheet pile, 2-first layer of ring beam, 3-recycling temporary corbel installation, 31, upright column, 32, upper ring, 33, lower ring, 34, first inclined rod, 35, first cross rod, 36, stop block, 37, second inclined rod, 38, bottom supporting beam, 39, third inclined rod, 310, scale, 311, end baffle, 312, hoisting hole, 313, fastening bolt, 4-first layer of ring beam fixing corbel, 5-second layer of ring beam, 6-second layer of ring beam fixing corbel, 7-bearing platform, 8-bottom sealing concrete layer, 9-clay base layer, 10-pile foundation steel casing, 11-first layer of inner support, 12-second layer of inner support, 13-fine sand, 14-mixture of cotton-wool bar-planting glue, 15-foam glue layer and 16-bamboo glue layer.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The utility model provides a sea area tidal region steel sheet pile cofferdam, refer to fig. 1 to 7, comprising steel sheet piles 1 enclosed on four sides, two adjacent steel sheet pile locking notches are buckled, a pile foundation steel pile casing 10 completed by construction is arranged in the area enclosed by the steel sheet piles, a foam glue layer 15 is sprayed on the outer side of the adjacent steel sheet pile locking notches, the inner side of the adjacent steel sheet pile locking notches is filled with a mixture 14 mixed with cotton wool and bar planting glue, a gap between the adjacent steel sheet pile locking notches is filled with fine sand 13, the inner wall of the steel sheet pile is provided with two layers of ring beams from top to bottom, which are respectively a first layer of ring beam 2 and a second layer of ring beam 5, wherein the first layer of ring beam is supported by a first layer of ring beam fixing bracket 4 fixed on the lower part of the first layer of ring beam and connected with the inner wall of the steel sheet pile, the second layer of ring beam is supported by a second layer of ring beam fixing bracket 6 fixed on the lower part of the, the first layer ring beam is provided with a first layer inner support, two ends of the first layer inner support are respectively connected with adjacent edges of the first layer inner support, the second layer ring beam is provided with a second layer inner support, and two ends of the second layer inner support are respectively connected with adjacent edges of the second layer inner support.
Wherein the pile foundation steel casing is distributed in a quincunx shape.
The base comprises a clay base layer 9, a bamboo plywood layer 16 and a bottom sealing concrete layer 8 from bottom to top.
The interim bracket of recycling includes top ring 32 and the below ring 33 that from top to bottom set up on stand 31 and the stand, the leading flank of below ring is equipped with first horizontal pole 35, the leading flank of top ring is equipped with first down tube 34 that lower extreme and first horizontal pole are connected, first horizontal pole, first down tube and stand form the triangle-shaped structure, the lower surface of below ring is equipped with dog 36, be equipped with second down tube 37 between dog and the first horizontal pole, the second down tube, first horizontal pole and dog form the triangle-shaped structure, the trailing flank of stand is equipped with bottom sprag beam 38, be equipped with third down tube 39 between bottom sprag beam and the pole setting, the bottom sprag beam, pole setting and third down tube form the triangle-shaped structure.
Space a between baffle and the stand forms the draw-in groove structure, can clamp the interim bracket of cyclic utilization on pile foundation steel protects a section of thick bamboo.
The upper ring and the lower ring are respectively fixed on the upright post through fastening bolts 313, and the side wall of the upright post is provided with a scale 310.
The top of stand is equipped with end baffle 311, has seted up hoisting hole 312 on the end baffle.
The utility model provides a pair of sea area tidal zone steel sheet pile cofferdam is under construction through following step:
(1) determining the elevation of the inner support system: determining the elevation of an internal support system of the steel sheet pile cofferdam according to the stratum and water level conditions of the steel sheet pile cofferdam;
(2) installation of the temporary bracket for recycling: under the low tide water level state, the temporary bracket 3 for recycling is hung at the top of the pile foundation steel casing 10, and then the first layer of ring beam is installed on the upper surface of the bottom supporting beam of the temporary bracket for recycling and is used as a guide frame when the steel sheet pile is inserted and beaten;
(3) inserting, beating and closing steel sheet piles: because the steel sheet pile 1 is easy to shift position under the influence of tidal water flow in the inserting and driving process, a temporary limit measure is arranged in the rising and falling tide period, the construction process of inserting and driving the steel sheet pile 1 is reduced as much as possible in the heavy tide, and the verticality of the steel sheet pile 1 is strictly controlled within 0.5 percent;
(4) installing an inner support system: after the steel sheet piles are folded to form a cofferdam, a first layer of ring beam fixing bracket 4 is installed, the first layer of ring beam is firmly fixed on the inner wall of the steel sheet pile through the first layer of ring beam fixing bracket, a temporary bracket which is recycled is removed, a pile foundation steel casing is cut off to the surface of a riverbed at a low tide water level, and then a first layer of inner support 11, a second layer of ring beam 5 and a second layer of inner support 12 are sequentially installed to ensure the integral stability of cofferdam excavation;
(5) cofferdam foundation clearing: pumping water by adopting a submersible pump, and excavating by utilizing a long-arm excavator after the pumping is finished to perform foundation cleaning operation;
(6) after the tide subsides, spraying a foam glue layer on the outer side (namely the side facing the tide) of the steel sheet pile, plugging the inner sides of the locking openings of the adjacent steel sheet piles by using a mixture of cotton wool and bar planting glue, and filling fine sand in the gaps between the locking openings of the adjacent steel sheet piles;
(7) bottom sealing operation: the geology of the cofferdam is that a clay base layer 9 is impervious, the exposure time of the cofferdam is shortened as much as possible after foundation cleaning is completed so as to avoid disturbance to a foundation soil body, water is pumped at a low tide level for bottom sealing and then dry sealing is carried out, the thickness is 50cm, in order to control the influence of overexcavation on the steel sheet pile 1, a mark is made on the boom of the excavator, and a specially-assigned person is dispatched to stare at and control the excavation depth. After the excavation is leveled, the bottom is paved with a layer of bamboo plywood to be connected into a whole, the phenomenon of grout turnover is prevented, a pump truck is used for paving a layer of thin bamboo plywood in a large area firstly during bottom sealing, so that the old bamboo plywood is uniformly stressed, the bamboo plywood with local stress is prevented from being inclined, sludge is enabled to be turned over and gushed upwards, the sludge and concrete are stirred together, local mud clamping is caused, and the bottom sealing effect is influenced.
(8) Dismantling the cofferdam: after the construction of the bearing platform 7 and the first section of the pier body is completed, when the construction height of the pier body is higher than the highest tide water level, the steel sheet pile cofferdam is dismantled, in order to guarantee the dismantling safety of the cofferdam, a steel sheet pile is firstly pulled out, the inside and the outside are guaranteed to be communicated, the water level elevations are consistent, and the inner support system is dismantled and the steel sheet pile is pulled out in sequence when the water level of low tide water is low.
The steel sheet pile cofferdam in the tidal area of the sea area provided by the utility model has the advantages that the elevation of the inner support system is reduced as much as possible by installing the inner support system at a low tide level, so that the structural design of the cofferdam is more reasonable; the cofferdam leakage stoppage adopts a triple combination method, so that the water stopping effect of the cofferdam under the influence of sea area tide changes is ensured; the cofferdam bottom sealing is dry sealed by low water tide level water pumping, and a layer of bamboo plywood is laid on the substrate, so that the slurry is prevented from turning during bottom sealing, the thickness of the bottom sealing is effectively ensured, and the quality of the bottom sealing is ensured.
Modifications and variations of the present invention will be apparent to those skilled in the art in light of the foregoing description, and all such modifications and variations are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (7)
1. The utility model provides a sea area tidal region steel sheet pile cofferdam, includes the steel sheet pile that four sides were enclosed, its characterized in that: the locking openings of two adjacent steel sheet piles are buckled with each other, a constructed pile foundation steel casing is arranged in the area surrounded by the steel sheet piles, the outer sides of the locking openings of the adjacent steel sheet piles are sprayed with a foam adhesive layer, the inner sides of the locking openings of the adjacent steel sheet piles are filled with a mixture of cotton wool and bar planting adhesive, a gap between the locking openings of the adjacent steel sheet piles is filled with fine sand, 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 and a second layer of ring beam, 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, 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, a first layer of inner support is erected on the first layer of ring beam, two, two ends of the support in the second layer are respectively connected with adjacent edges of the support in the second layer.
2. The sea tidal zone steel sheet pile cofferdam of claim 1, wherein: the pile foundation steel casing is distributed in a quincunx shape.
3. The sea tidal zone steel sheet pile cofferdam of claim 1, wherein: the base comprises a clay base layer, a bamboo plywood layer and a bottom sealing concrete layer from bottom to top.
4. The sea tidal zone steel sheet pile cofferdam of claim 1, wherein: and a temporary bracket for recycling is hung on the pile foundation steel casing.
5. The sea tidal zone steel sheet pile cofferdam of claim 4, wherein: the interim bracket of recycling includes upper ring and the below ring that from top to bottom set up on stand and the stand, the leading flank of below ring is equipped with first horizontal pole, the leading flank of upper ring is equipped with the first down tube that lower extreme and first horizontal pole are connected, first horizontal pole, first down tube and stand form the triangle-shaped structure, the lower surface of below ring is equipped with the dog, be equipped with the second down tube between dog and the first horizontal pole, the second down tube, first horizontal pole and dog form the triangle-shaped structure, the trailing flank of stand is equipped with a bottom sprag beam, be equipped with the third down tube between a bottom sprag beam and the pole setting, a bottom sprag beam, pole setting and third down tube form the triangle-shaped structure.
6. The sea tidal zone steel sheet pile cofferdam of claim 5, wherein: the upper ring and the lower ring are fixed on the stand column through fastening bolts respectively, and the side wall of the stand column is provided with a scale.
7. The sea tidal zone steel sheet pile cofferdam of claim 5, wherein: the top of stand is equipped with the end baffle, has seted up the hole for hoist on the end baffle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021139266.1U CN213296396U (en) | 2020-06-18 | 2020-06-18 | Steel sheet pile cofferdam for tidal zone of sea area |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021139266.1U CN213296396U (en) | 2020-06-18 | 2020-06-18 | Steel sheet pile cofferdam for tidal zone of sea area |
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| CN213296396U true CN213296396U (en) | 2021-05-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277778A (en) * | 2021-11-24 | 2022-04-05 | 中交二公局萌兴工程有限公司 | Steel sheet pile inserting auxiliary positioning device and steel sheet pile cofferdam construction process thereof |
| WO2023093632A1 (en) * | 2021-11-24 | 2023-06-01 | 中铁上海工程局集团有限公司 | Lock-type steel pipe pile cofferdam for cemented pebble geology |
-
2020
- 2020-06-18 CN CN202021139266.1U patent/CN213296396U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277778A (en) * | 2021-11-24 | 2022-04-05 | 中交二公局萌兴工程有限公司 | Steel sheet pile inserting auxiliary positioning device and steel sheet pile cofferdam construction process thereof |
| CN114277778B (en) * | 2021-11-24 | 2023-03-14 | 中交二公局萌兴工程有限公司 | Steel sheet pile inserting auxiliary positioning device and steel sheet pile cofferdam construction process thereof |
| WO2023093632A1 (en) * | 2021-11-24 | 2023-06-01 | 中铁上海工程局集团有限公司 | Lock-type steel pipe pile cofferdam for cemented pebble geology |
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