CN214993969U - Envelope of water-through type river-blocking cofferdam - Google Patents
Envelope of water-through type river-blocking cofferdam Download PDFInfo
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- CN214993969U CN214993969U CN202022571798.9U CN202022571798U CN214993969U CN 214993969 U CN214993969 U CN 214993969U CN 202022571798 U CN202022571798 U CN 202022571798U CN 214993969 U CN214993969 U CN 214993969U
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Abstract
The utility model discloses a water-through type retaining structure of a river-blocking cofferdam, which comprises a first seepage-proofing steel sheet pile, a second seepage-proofing steel sheet pile and a retaining steel sheet pile; supporting section steel and horizontal section steel are arranged between the second anti-seepage steel sheet pile and the enclosure steel sheet pile, and a water passing pipeline is erected; backfilling is arranged between the first seepage-proofing steel sheet pile and the second seepage-proofing steel sheet pile, and the first seepage-proofing steel sheet pile, the second seepage-proofing steel sheet pile and the enclosure steel sheet pile at the water passing pipeline are all provided with notches; and a concrete anti-seepage structure covering the water passing pipeline is arranged on the backfill soil at the groove opening. The retaining structure is characterized in that a first impermeable steel sheet pile, a second impermeable steel sheet pile and a retaining steel sheet pile are arranged to serve as an impermeable structure of the construction cofferdam, a water passing pipeline is erected through supporting section steel and horizontal section steel, and a backfill and concrete impermeable structure is arranged, so that river water interception at the river blocking cofferdam is realized, a river channel is communicated through the water passing pipeline, the requirement of river water passing can be met rapidly, and the safety and stability of a foundation pit of the river blocking cofferdam can be guaranteed.
Description
Technical Field
The utility model relates to an envelope of water-through formula river-blocking cofferdam belongs to hydraulic structure construction technical field.
Background
When a river needs to be provided with a river blocking cofferdam, the whole river is usually transversely cut off and then construction is carried out in a dry environment. However, when a river has a water passing requirement, a temporary water passing channel is often dug beside a river channel, the river is firstly diverted, and then cofferdam construction is performed, the construction method has the problems of high cost, long construction period and the like, bank slopes on two sides of the river channel are required to have a certain width, otherwise, when open channel excavation conditions are not met, the difference of water levels of upstream and downstream of the river channel is small, and the construction difficulty is increased when the downstream water level changes along with tides.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem that exists in the river cofferdam construction when having the requirement of logical water to river among the prior art, the utility model provides a envelope of logical water formula river cofferdam.
For solving the technical problem, the utility model discloses a following technical scheme:
an envelope of a water-through type river-blocking cofferdam comprising:
the anti-seepage steel sheet pile I, the anti-seepage steel sheet pile II and the enclosure steel sheet pile; the upstream and the downstream of the river-blocking cofferdam are respectively provided with a first seepage-proofing steel sheet pile, a second seepage-proofing steel sheet pile and a containment steel sheet pile which are sequentially arranged at intervals from far to near; a main construction area of the river blocking cofferdam is arranged between the two enclosure steel sheet piles;
a plurality of groups of supporting section steel are arranged between the second anti-seepage steel sheet pile and the enclosure steel sheet pile, each group of supporting section steel is provided with a horizontal section steel, and a water passing pipeline is erected on the horizontal section steel corresponding to the upstream and the downstream of the river blocking cofferdam; backfill is arranged between the first impermeable steel sheet pile and the second impermeable steel sheet pile, and the first impermeable steel sheet pile, the second impermeable steel sheet pile and the enclosure steel sheet pile at the water passing pipeline are all provided with notches for installing the water passing pipeline; and a concrete seepage-proofing structure covering the water passing pipeline is arranged on the backfill soil at the groove opening, and the concrete seepage-proofing structure is used for plugging the groove opening at the water passing pipeline.
Further, the height H of the pile top at the notch1Should satisfy H1≤Hmin-D; wherein HminThe lowest water level of river water in the construction period, and D is the outer diameter of a water passing pipeline.
Further, be provided with the convex fixed block with the pipeline external diameter assorted on the horizontal shaped steel that lies in the pipeline both sides of crossing.
Furthermore, a waterproof steel plate is arranged in the concrete seepage-proofing structure, and the waterproof steel plate is welded and fixed with the water passing pipeline and is perpendicular to the axis of the water passing pipeline.
And further, a drainage open channel is formed between the second anti-seepage steel sheet pile and the enclosure steel sheet pile, and water pumping equipment is adopted for drainage.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art, have following advantage and positive effect: the retaining structure is characterized in that a first impermeable steel sheet pile, a second impermeable steel sheet pile and a retaining steel sheet pile are arranged to serve as the impermeable structure of the construction cofferdam, supporting section steel and horizontal section steel used for erecting a water passing pipeline are arranged between the second impermeable steel sheet pile and the retaining steel sheet pile, and backfill and concrete impermeable structures are arranged on the first impermeable steel sheet pile and the second impermeable steel sheet pile, so that river water interception at the river blocking cofferdam is realized, a river channel is communicated through the water passing pipeline, the requirement of river water passing can be met rapidly, and the safety and stability of a foundation pit of the river blocking cofferdam can be guaranteed.
Drawings
Fig. 1 is a schematic construction view of a water-through type river-blocking cofferdam of the utility model;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
fig. 3 is a cross-sectional view taken along line B-B of fig. 1.
The numbers in the figures are as follows:
1-temporary steel sheet piles; 2-seepage-proofing steel sheet pile I; 3-seepage-proofing steel sheet pile II; 4-enclosing steel sheet piles;
5-backfilling; 6-supporting the section steel; 7-horizontal section steel; 8-a water passing pipeline; 9-concrete seepage-proofing structure; 10-connecting channel steel; 11-channel steel purlin; 12-water-proof steel plate.
Detailed Description
The following describes the envelope of the water-through type river-blocking cofferdam of the present invention in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent in conjunction with the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
Example one
The embodiment provides a construction method of a water-through type river-blocking cofferdam, which is further described with reference to fig. 1 to 3 and comprises the following steps:
step one, carrying out paying-off positioning on the river blocking cofferdam and the upstream and downstream areas to be constructed, and cleaning obstacles. According to the technical scheme, 8 rows of steel sheet piles need to be arranged, the steel sheet piles are positioned, the barriers below the steel sheet piles are cleaned, and the steel sheet piles are prevented from being inserted and driven at positions and being provided with the barriers.
Step two, constructing 4 rows of steel sheet piles respectively by adopting pile sinking equipment at the upstream and downstream of the river-blocking cofferdam, and sequentially arranging a temporary steel sheet pile 1, an anti-seepage steel sheet pile I2, an anti-seepage steel sheet pile II 3 and an enclosure steel sheet pile 4 from far to near; the tops of the temporary steel sheet pile 1, the first seepage-proofing steel sheet pile 2, the second seepage-proofing steel sheet pile 3 and the enclosure steel sheet pile 4 are all higher than the highest river water level in the construction period; and performing secondary pile sinking on the positions where the water passing pipeline 8 is placed on the first impermeable steel sheet pile 2, the second impermeable steel sheet pile 3 and the enclosure steel sheet pile 4 to form notches.
It should be noted that, because the steel sheet piles may be damaged, twisted, and deformed during loading, unloading, and transportation, the steel sheet piles should be subjected to deformation inspection before insertion and driving. And correcting the steel sheet pile with serious deformation and carrying out pin-notch passing inspection. And removing residues left on the surface of the steel sheet pile after the steel sheet pile is used in the earlier stage due to welding of the steel sheet and the steel bar. In addition, the vibration hammer is required to be checked, is a key device for driving and pulling the steel sheet pile, and is required to be specially checked before driving and pulling, so that the smooth circuit and the abnormal function are ensured, and the teeth of the clamping plate of the vibration hammer cannot be abraded too much. For example, a crawler-type excavator standing on the shore can be used for driving steel sheet piles by being equipped with a hydraulic vibration hammer, underground pipelines and structures are familiar before construction, accurate supporting pile center lines and initial pile positions are carefully released, and a theodolite is erected on one side of a river during the sinking of the steel sheet piles, so that the verticality and the axis position of the theodolite are controlled.
It needs to explain, at first sink the steel sheet pile to unified elevation, owing to need erect water pipe 8, consequently be located the steel sheet pile of water pipe 8 below and need carry out secondary pile sinking, because the steel sheet pile has the hasp, splice into integrative steel sheet pile with the steel sheet pile unit through the hasp, for preventing to draw the elevation of other adjacent steel sheet pile units low, need weld a plurality of adjacent steel sheet pile units as an organic whole through connecting channel-section steel 10, thereby when secondary pile sinking, reduce the influence to adjacent steel sheet pile unit. Further, the height of the pile top at the groove opening is not higher than the lowest water level of the river channel in the construction period, the construction period is mainly flood season, and the river channel has water passing requirements in the flood season so as to guarantee flood control requirements. Recording the height of the pile top at the notch as H1The lowest river water level in the construction period is recorded as HminThe outer diameter of the water passing pipeline 8 is marked as D, and H is satisfied1≤HminD, so as to meet the river channel water flowing requirement.
And step three, after dredging is carried out between the first impermeable steel sheet pile 2 and the second impermeable steel sheet pile 3, backfilling 5 is filled. The first seepage-proofing steel sheet pile 2 and the second seepage-proofing steel sheet pile 3 mainly play a role in seepage proofing, sludge is cleaned, the clay meeting requirements is replaced and compacted, and the seepage-proofing effect can be improved. In order to ensure the stability of the temporary steel sheet pile 1, the first impermeable steel sheet pile 2 and the second impermeable steel sheet pile 3 in construction, preferably, the temporary steel sheet pile 1 and the first impermeable steel sheet pile 2, and the first impermeable steel sheet pile 2 and the second impermeable steel sheet pile 3 are connected at the top through a channel steel purlin 11.
Vertically driving a plurality of groups of supporting section steel 6 between the seepage-proofing steel sheet pile II 3 and the enclosure steel sheet pile 4, and arranging a horizontal section steel 7 above each group of supporting section steel 6; and hoisting the water passing pipeline 8, so that the water passing pipeline 8 is supported on the horizontal section steel 7 corresponding to the upper and lower reaches, the water passing pipeline 8 is positioned at the notches corresponding to the first impermeable steel sheet pile 2, the second impermeable steel sheet pile 3 and the enclosure steel sheet pile 4, and two ends of the water passing pipeline 8 exceed the first impermeable steel sheet pile 2 of the upper and lower reaches.
Support shaped steel 6 and horizontal shaped steel 7 can adopt H shaped steel, and support shaped steel 6 can be two a set of, and an H shaped steel of welding in the top of supporting shaped steel 6. By way of example: the cross-sectional dimension of the H-shaped steel is 400mm multiplied by 13mm multiplied by 21mm, the length of the supporting section steel is 15 meters, and the length of the horizontal section steel is 2 meters. The horizontal section steel is used as a carrying pole to place the water passing pipeline, and further, the horizontal section steel 7 positioned on two sides of the water passing pipeline 8 is provided with a circular arc-shaped fixing block matched with the outer diameter of the water passing pipeline 8, so that the water passing pipeline 8 is prevented from rolling on the horizontal section steel 7.
Pouring concrete on the backfill soil 5 between the first impermeable steel sheet pile 2 and the second impermeable steel sheet pile 3 to form a concrete impermeable structure 9, wherein the concrete impermeable structure 9 covers the water passing pipeline 8 and blocks the notch at the corresponding position of the first impermeable steel sheet pile 2; after the concrete reaches the strength, pulling out the temporary steel sheet pile 1 to communicate the upstream and downstream river channels through a water passing pipeline 8; and then carrying out river-blocking cofferdam construction in the area between the upstream and downstream enclosure steel sheet piles 4.
Because the first seepage-proofing steel sheet pile 2, the second seepage-proofing steel sheet pile 3 and the enclosure steel sheet pile 4 form the notches through secondary pile sinking, when the temporary steel sheet pile 1 is removed, the temporary steel sheet pile flows into a construction area of the river-blocking cofferdam from gaps among the water passing pipeline 8, the first seepage-proofing steel sheet pile 2, the second seepage-proofing steel sheet pile 3 and the enclosure steel sheet pile 4. In order to prevent river water from entering a construction area, concrete is poured on the backfill 5 between the first impermeable steel sheet pile 2 and the second impermeable steel sheet pile 3 to form a concrete impermeable structure 9 to block the notch. Further, before the concrete is poured, the waterproof steel plate 12 is welded to the water passing pipe 8, and then the concrete is poured. The water-stop steel plate 12 can increase the seepage path of river water in concrete and reduce seepage.
In addition, the number and cross-sectional size of the water passage pipes to be installed may be set according to the flow rate of water, and for example, two water passage pipes each having a diameter of 1200mm and a thickness of 10mm are used. The water passing pipeline adopts steel pipes, the steel pipes are transported to the field for welding in sections, the welding requirements are that the steel pipes are provided with inner grooves, the outer sides of the steel pipes are fully welded after the inner sides of the steel pipes are fully welded, the plumpness of welding seams is rechecked, and the grooves can not be formed if the steel pipes can be completely butt-welded. The steel plate full welding is pasted to the steel pipe bottom, and the water proof steel sheet is welded in addition to the upstream face steel pipe outside. If the water passing pipeline 8 needs to be spliced by multiple sections, an inner groove is formed in the steel pipe, full welding is carried out on the outer side after full welding is carried out on the inner side, the saturation degree of the welding line rechecks requirements, and if the water passing pipeline can be completely butt-welded, the groove can not be formed.
It should be noted that, in this embodiment, the above-mentioned construction steps are not strictly arranged in the construction sequence, and some of the steps may be interchanged or performed simultaneously. For example, in order to improve the construction efficiency, a first impermeable steel sheet pile 2, a second impermeable steel sheet pile 3 and a containment steel sheet pile 4 can be constructed firstly, and then a temporary steel sheet pile 1 is constructed for pile sinking, desilting and earthwork backfilling, dewatering and excavating in a river blocking cofferdam area, and construction of supporting section steel 6 and horizontal section steel 7 are constructed synchronously; after the temporary steel sheet pile 1 is sunk, secondary pile sinking construction, hoisting of the water passing pipeline 8 and concrete pouring are carried out, and the river damming area is still in a construction state in the process, so that the construction period is greatly shortened.
Further, in order to enable the river blocking cofferdam area to be in a dry construction environment, preferably, a drainage open channel is arranged between the second anti-seepage steel sheet pile 3 and the containment steel sheet pile 4, so that redundant water is drained away, and the osmotic pressure is reduced.
According to the construction method of the water-through type river-blocking cofferdam, the first seepage-proof steel sheet pile, the second seepage-proof steel sheet pile and the enclosure steel sheet pile are arranged to serve as seepage-proof structures of the construction cofferdam, notches are formed in the first seepage-proof steel sheet pile, the second seepage-proof steel sheet pile and the enclosure steel sheet pile through secondary pile sinking, and the water passing pipeline is erected through the arrangement of the supporting section steel and the horizontal section steel, so that river closure is achieved at the river-blocking cofferdam, a river channel is communicated through the water passing pipeline, the water-through requirement of the river can be met rapidly, and the safety and stability of a foundation pit of the river-blocking cofferdam can be guaranteed.
Example two
The present embodiment provides an envelope of a water-through barrage, which is further described with reference to fig. 1 to 3. The enclosure structure comprises a first seepage-proofing steel sheet pile 2, a second seepage-proofing steel sheet pile 3 and an enclosure steel sheet pile 4; the upstream and the downstream of the river-blocking cofferdam are respectively provided with a first seepage-proofing steel sheet pile 2, a second seepage-proofing steel sheet pile 3 and a containment steel sheet pile 4 which are sequentially arranged at intervals from far to near; and a main construction area of the river blocking cofferdam is arranged between the two enclosure steel sheet piles 4. A plurality of groups of supporting section steel 6 are arranged between the second impermeable steel sheet pile 3 and the enclosure steel sheet pile 4, each group of supporting section steel 6 is provided with a horizontal section steel 7, and a water passing pipeline 8 is erected on the horizontal section steel 7 corresponding to the upstream and the downstream of the river blocking cofferdam; backfill 5 is arranged between the first seepage-proofing steel sheet pile 2 and the second seepage-proofing steel sheet pile 3, and the first seepage-proofing steel sheet pile 2, the second seepage-proofing steel sheet pile 3 and the enclosure steel sheet pile 4 at the water passing pipeline 8 are all provided with notches for installing the water passing pipeline 8; and a concrete seepage-proofing structure covering the water passing pipeline 8 is arranged on the backfill soil 5 at the groove, and the concrete seepage-proofing structure 9 is used for plugging the groove at the water passing pipeline 8.
Preferably, the height H of the pile top at the notch is1Should satisfy H1≤Hmin-D; wherein HminIs the lowest water level of river water in the construction period, and D is the outer diameter of a water passing pipeline 8.
In a preferred embodiment, circular arc-shaped fixing blocks matched with the outer diameter of the water passing pipeline 8 are arranged on the horizontal steel sections 7 positioned on the two sides of the water passing pipeline 8.
In a preferred embodiment, a waterproof steel plate 12 is arranged in the concrete impermeable structure, and the waterproof steel plate 12 is welded and fixed with the water passing pipeline 8 and is perpendicular to the axis of the water passing pipeline 8.
The preferable embodiment is that a drainage open channel is formed between the second impermeable steel sheet pile 3 and the enclosure steel sheet pile 4, and water pumping equipment is adopted for drainage.
The embodiment provides a retaining structure of water-through type river-blocking cofferdam, through setting up prevention of seepage steel sheet pile one, prevention of seepage steel sheet pile two, the prevention of seepage steel sheet pile is as the seepage prevention structure of construction cofferdam to set up support shaped steel and horizontal shaped steel that are used for setting up the water passing pipeline between prevention of seepage steel sheet pile two, prevention of seepage steel sheet pile two set up backfill and concrete seepage prevention structure, thereby realize river damming of river-blocking cofferdam department, make the river course through the water passing pipeline link up, can satisfy river water-through requirement fast, and can guarantee river-blocking cofferdam foundation pit safety and stability.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. The utility model provides an envelope of water-passing type river-blocking cofferdam which characterized in that includes:
the anti-seepage steel sheet pile I, the anti-seepage steel sheet pile II and the enclosure steel sheet pile; the upstream and the downstream of the river-blocking cofferdam are respectively provided with a first seepage-proofing steel sheet pile, a second seepage-proofing steel sheet pile and a containment steel sheet pile which are sequentially arranged at intervals from far to near; a main construction area of the river blocking cofferdam is arranged between the two enclosure steel sheet piles;
a plurality of groups of supporting section steel are arranged between the second anti-seepage steel sheet pile and the enclosure steel sheet pile, each group of supporting section steel is provided with a horizontal section steel, and a water passing pipeline is erected on the horizontal section steel corresponding to the upstream and the downstream of the river blocking cofferdam; backfill is arranged between the first impermeable steel sheet pile and the second impermeable steel sheet pile, and the first impermeable steel sheet pile, the second impermeable steel sheet pile and the enclosure steel sheet pile at the water passing pipeline are all provided with notches for installing the water passing pipeline; and a concrete seepage-proofing structure covering the water passing pipeline is arranged on the backfill soil at the groove opening, and the concrete seepage-proofing structure is used for plugging the groove opening at the water passing pipeline.
2. A water-through type river-damming cofferdam building envelope of claim 1, wherein the pile top height H at the notch is H1Should satisfy H1≤Hmin-D; wherein HminThe lowest water level of river water in the construction period, and D is the outer diameter of a water passing pipeline.
3. The envelope structure of a water-passing type river blocking cofferdam of claim 1, wherein the horizontal section steels at both sides of the water passing pipe are provided with arc-shaped fixing blocks matched with the outer diameter of the water passing pipe.
4. A space enclosing structure of a water-passing type river blocking cofferdam as claimed in claim 1, wherein a water-stop steel plate is arranged in the concrete impervious structure, and the water-stop steel plate is welded and fixed with the water passing pipeline and is perpendicular to the axis of the water passing pipeline.
5. A space enclosing structure of a water-through type river blocking cofferdam of claim 1, wherein a drainage open channel is formed between the second impermeable steel sheet pile and the space enclosing steel sheet pile, and a pumping device is used for drainage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022571798.9U CN214993969U (en) | 2020-11-09 | 2020-11-09 | Envelope of water-through type river-blocking cofferdam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022571798.9U CN214993969U (en) | 2020-11-09 | 2020-11-09 | Envelope of water-through type river-blocking cofferdam |
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| Publication Number | Publication Date |
|---|---|
| CN214993969U true CN214993969U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022571798.9U Active CN214993969U (en) | 2020-11-09 | 2020-11-09 | Envelope of water-through type river-blocking cofferdam |
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| CN (1) | CN214993969U (en) |
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- 2020-11-09 CN CN202022571798.9U patent/CN214993969U/en active Active
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