CN217537018U - Steel-pipe pile cofferdam water retaining structure before reservoir dam - Google Patents
Steel-pipe pile cofferdam water retaining structure before reservoir dam Download PDFInfo
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- CN217537018U CN217537018U CN202221391165.2U CN202221391165U CN217537018U CN 217537018 U CN217537018 U CN 217537018U CN 202221391165 U CN202221391165 U CN 202221391165U CN 217537018 U CN217537018 U CN 217537018U
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Abstract
The utility model discloses a steel-pipe pile cofferdam water retaining structure in front of reservoir dam, which comprises a reservoir dam and a steel-pipe pile cofferdam body, wherein the steel-pipe pile cofferdam body comprises a vertical steel-pipe pile and a transverse support rod; the near end of the support rod is connected with the steel pipe pile; the far end of the support rod is fixedly connected with the inner side surface of the reservoir dam; the bottom end of the steel pipe pile is inserted below a foundation rock surface line of the reservoir; the steel pipe pile comprises at least two steel pipes which are arranged side by side, namely the axes of all the steel pipes are parallel, and every two steel pipes are connected through a C9 lock catch; the utility model discloses can realize the manger plate function by the unilateral, be particularly useful for among the reservoir class engineering, can effectively prevent the releasing of reservoir internal water resource, guarantee the make full use of water resource, it is not extravagant. The unilateral steel-pipe pile cofferdam saves more investment than the steel-pipe pile cofferdam of arranging all around.
Description
Technical Field
The utility model belongs to the technical field of hydraulic engineering temporary engineering and specifically relates to a steel-pipe pile cofferdam manger plate structure before reservoir dam.
Background
The method is characterized in that the reservoir dam is subjected to danger removing reinforcement, concrete chiseling and pouring are carried out on the dam, heightening and thickening are carried out, emptying the reservoir is carried out in conventional treatment, dry land construction conditions are built, and danger removing reinforcement is carried out on the dam. However, if large-scale hydro-junction engineering is met, the reservoir has irrigation or other functions, or the water quality of the reservoir does not reach the standard and can not be discharged in a river channel, and for similar reasons, a cofferdam is required to be built in a reservoir area. Through analysis, 21m is in the deepest part of the water level in front of the dam, and after technical and economic comparison, the steel pipe pile cofferdam is finally selected. Traditional steel-pipe pile cofferdam is rectangle or circular shape enclosed construction, sets up inside and encloses purlin and horizontal support, and this kind of enclosed construction can balance the hydraulic pressure effect, reaches the dry land effect of being under construction. Therefore, aiming at the danger eliminating and reinforcing engineering of the reservoir dam, how to close the cofferdam by the dam is a problem to be considered. There are several major problems:
1. the total length of the reservoir dam is 400m, water exists at the upstream, water does not exist at the downstream, and the arrangement of a square cofferdam or a circular cofferdam cannot be realized.
2. The reservoir water level is high, according to the regulations in the technical Standard of Steel cofferdam engineering (GB/T51295-2018), the highest water retaining level of the conventional steel pipe pile cofferdam is not more than 15m, the water retaining level of the steel pipe pile of the reservoir reaches 21m, and the conventional steel pipe pile cofferdam is difficult to realize.
Publication (bulletin) No.: CN214328934U, published (announced): 2021-10-01 relates to the field of hydraulic engineering construction, in particular to a cofferdam. Including being annular bottom plate and floating cabin, the inner circle edge of bottom plate is provided with the vertical inboard baffle that upwards stretches out, the outer lane of bottom plate is provided with the outside skeleton, floating the cabin and being located between inboard baffle and the outside skeleton, the bottom on the inboard surface of inboard baffle is provided with pumping device, pumping device's play water end with floating the inside of cabin is linked together, floating the outside top department of cabin and being provided with the discharge structure who is linked together with floating the inside of cabin. The cofferdam is convenient to move to the required construction position.
Publication (bulletin) No.: CN207160035U, published (announced): 2018-03-30 discloses a cofferdam, and the technical scheme is that the cofferdam comprises a steel template, a bridging structure and a buckle assembly for assembling the bridging structure, the bridging structure is placed on the ground, the steel template is fixed on the bridging structure, waterproof cloth is laid on the steel template, a plurality of hook assemblies are arranged on the upper portion of the steel template, the hook assemblies hook the waterproof cloth, the waterproof cloth comprises folded edges, perforated holes and hanging rods, the folded edges are located at positions, close to the hook assemblies, of the waterproof cloth, the perforated holes are formed after the folded edges are bent reversely, the hanging rods are inserted into the perforated holes, the hook assemblies comprise clamping tongues, hinged shafts and supports, the hinged shafts are arranged on the upper portions of the hanging rods and penetrate the clamping tongues and the supports simultaneously, one ends, far away from the hinged shafts, of the supports are fixed on the steel template, the free ends of the clamping tongues are bent towards the direction of the steel template in an arc shape and are bent upwards, and the hanging rods are placed on the inner sides of the lower portion of the clamping tongues in the arc shape. The hanging rod for hooking the waterproof cloth is additionally arranged, so that the problem of stress concentration is solved.
Publication (bulletin) No.: CN110616726B, published (announced): 2021-03-02 relates to a water-retaining cofferdam structure, which comprises a water-retaining cofferdam arranged along the flowing direction of a river, wherein the water-retaining cofferdam comprises a plurality of water-retaining plates, the two sides of each water-retaining plate are respectively provided with a clamping groove and a clamping block along the installation direction of the water-retaining plate, and the two adjacent water-retaining plates are mutually clamped through the clamping grooves and the clamping blocks. In the work progress of carrying out the manger plate cofferdam, carry out the installation of breakwater along the construction trend of manger plate cofferdam, squeeze into the riverbed with the breakwater and fix, again in proper order with the fixture block joint of a back breakwater in the draw-in groove of a preceding breakwater to squeeze into the riverbed with it and fix, so circulate, form until the manger plate cofferdam, compare in the direct mode of piling and building with the bagged soil, the construction of the manger plate cofferdam of being convenient for more.
Publication (bulletin) No.: CN113653078a, published (announced): 2021-11-16 provide a steel pipe pile cofferdam structure in a reservoir area before a dam and a construction method thereof, wherein the cofferdam structure comprises a dam body, a plurality of lock catch steel pipe piles are arranged on one side of the dam body close to a water area, the lock catch steel pipe piles are arranged side by side, a blocking surface parallel to one side of the dam body close to the water area is formed by the lock catch steel pipe piles, and two adjacent lock catch steel pipe piles are clamped through a clamping structure; the bottom of hasp steel-pipe pile extends the basic basement rock face at the bottom of the reservoir, the inside of hasp steel-pipe pile is provided with the embedded rock concrete pile, the bottom of embedded rock concrete pile extends the basic basement rock face at the bottom of the reservoir, belongs to steel-pipe pile cofferdam technical field to solve current structure and method construction quality under water and be difficult to control, the efficiency of construction under water is low, the time limit for a project is difficult to control, the problem that the cost is high.
Publication (bulletin) no: CN206128094U, published (announced): 2017-04-26 discloses a lattice type steel pipe pile cofferdam, which comprises two rows of vertical steel pipes arranged along the axial direction of the cofferdam, a plurality of rows of horizontal vertical steel pipes arranged along the axial direction of the cofferdam, a vertical enclosing purlin, a horizontal pull rod, an oblique pull rod, a soil retaining plate, geotechnical cloth, a riprap body and a ballast layer. The longitudinal vertical steel pipe and the transverse vertical steel pipe are integrally and fixedly connected with the longitudinal enclosing purlin, the transverse pull rod and the oblique pull rod to form a three-dimensional frame structure, and earthwork is filled in the three-dimensional frame; every row of vertical steel pipes adopt the fender board to keep off the soil between, and the fender board inboard is laid the anti-filter of nonwoven geotechnological cloth, and cofferdam manger plate side sets up riprap body scour protection, and the foundation ditch side sets up the suppression body suppression. Simple structure, convenient material taking, convenient construction, low cost, small steel consumption and reusability.
Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, to the utility model discloses more technical characteristics and the technical problem and the beneficial effect that will solve all do not have the technological inspiration in the above technical document that discloses.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a steel-pipe pile cofferdam manger plate structure before reservoir dam to the defect that prior art exists, can unilateral realize the manger plate function, be particularly useful for among the reservoir class engineering, can effectively prevent the releasing of reservoir internal water resource, guarantee the make full use of water resource, it is not extravagant. The unilateral steel-pipe pile cofferdam saves more investment than the steel-pipe pile cofferdam of arranging all around. Connect through the C9 hasp between the steel pipe, can realize the stagnant water effect, can also guarantee orderly the linking together between the steel pipe. One side of the steel pipe pile bears water pressure of 21m height, the other side of the steel pipe pile is transmitted to the support through the surrounding purlin, and then the support transmits the water pressure borne by the steel pipe pile to the dam, so that the balance state of the steel pipe pile is achieved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a cofferdam water retaining structure of a steel pipe pile in front of a reservoir dam comprises the reservoir dam and a steel pipe pile cofferdam body, wherein the steel pipe pile cofferdam body comprises a vertical steel pipe pile and a transverse supporting rod;
the near end of the support rod is connected with the steel pipe pile; the far end of the support rod is fixedly connected with the inner side surface of the reservoir dam; the bottom end of the steel pipe pile is inserted below a foundation rock surface line of the reservoir;
the steel pipe pile comprises at least two steel pipes arranged side by side, the axes of all the steel pipes are parallel, and the steel pipes are fastened in a sealing manner through C9 lock catches.
Further, the folding purlin also comprises a surrounding purlin, a seat plate and a tie rod;
the purlin is transversely arranged on the rear side surface of the steel pipe pile; the near end of the supporting rod is connected with the surrounding purlin; the seat plate is fixed on the rear side surface of the steel pipe pile, and the purlin is fixed on the seat plate; the tie bars are splayed diagonal braces, and when the number of the enclosing purlins is more than two, the two enclosing purlins are connected by the tie bars.
Furthermore, the enclosing purlins and the supports are provided with six layers from top to bottom, wherein the first layer, the fifth layer and the sixth layer of enclosing purlins are of the same section, the second layer, the third layer and the fourth layer are of the same section, and the enclosing purlins are formed by double-spliced hot-rolled H-shaped steel; the supporting rods are made of hot-rolled H-shaped steel, the first layer, the fifth layer and the sixth layer are made of the same supporting cross sections, and the second layer, the third layer and the fourth layer are made of the same supporting cross sections.
Compared with the prior art, the utility model following beneficial effect has:
1. conventional steel-pipe pile cofferdam manger plate degree of depth should not exceed 15m, and the utility model discloses a steel-pipe pile cofferdam manger plate degree of depth can reach 21m, realizes more deep water level manger plate function.
2. Conventional steel-pipe pile cofferdam is confined structure all around, and the utility model discloses a water retaining function can be realized to the unilateral in steel-pipe pile cofferdam, is particularly useful for among the reservoir class engineering, can effectively prevent the releasing of reservoir water resource, guarantees the make full use of water resource, and is not extravagant.
3. The unilateral steel-pipe pile cofferdam saves more investment than the steel-pipe pile cofferdam of arranging all around. Unilateral manger plate structure, steel-pipe pile one side bear the high water pressure of 21m, and the opposite side transmits the support through enclosing the purlin, then supports the water pressure transmission that the steel-pipe pile bore to the dam, realizes the balanced state of steel-pipe pile.
4. The steel pipes are connected together by a c9 lock catch. Not only can seal water, but also can ensure that the steel pipes are mutually hooked tightly and firmly.
5. The utility model discloses an effectual adaptation topography and landform of steel-pipe pile cofferdam combines on-the-spot actual conditions, realizes the manger plate function.
Drawings
Fig. 1 is a schematic plan view of the water retaining structure of the steel pipe pile cofferdam in front of the reservoir dam of the utility model;
fig. 2 is a schematic elevation view of a cofferdam retaining structure of a steel pipe pile in front of a reservoir dam of the utility model;
FIG. 3 is a structural schematic diagram of a steel pipe pile cofferdam;
fig. 4 is a side view of the present invention;
fig. 5 is a top view of the present invention;
FIG. 6 is an enlarged view of FIG. 5 at A;
fig. 7 is an enlarged view of fig. 5 at B.
In the figure: a foundation rock face line 100; a reservoir dam 200;
a steel pipe 1; a seat plate 2; a surrounding purlin 3; a support rod 4; a tie bar 5; c9 lock catch 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 7, the present invention provides a technical solution:
a steel pipe pile cofferdam water retaining structure in front of a reservoir dam comprises a reservoir dam 200 and a steel pipe pile cofferdam body, wherein the steel pipe pile cofferdam body comprises a vertical steel pipe pile and a transverse support rod 4; the steel pipe pile cofferdam body can be combined and used by a plurality of parallel rows according to the width of the reservoir dam 200.
The near end of the support rod is connected with the steel pipe pile; the far end of the support rod is fixedly connected with the inner side surface of the reservoir dam; the lower end of the steel pipe pile is inserted into a foundation rock surface line of the reservoir for 1.5m, and concrete is poured in a reinforcing bar mode;
the steel pipe pile comprises at least two steel pipes 1 which are arranged side by side, namely the axes of all the steel pipes are parallel, and every two steel pipes are hermetically fastened through C9 lock catches 6;
further, the purlin comprises a surrounding purlin 3, a seat plate 2 and a tie rod 5;
the purlin is transversely arranged on the rear side surface of the steel pipe pile; the near end of the supporting rod is connected with the surrounding purlin; the seat plate is fixed on the rear side surface of the steel pipe pile, and the purlin is fixed on the seat plate; the tie bars are splayed diagonal braces, and when the number of the enclosing purlins is more than two, the two enclosing purlins are connected by the tie bars.
Enclose purlin and support top-down and set up six layers altogether, and wherein the purlin is enclosed in first layer, fifth layer, sixth layer and adopts the same section, and second floor, third layer, fourth layer adopt the same section, enclose the purlin and adopt double pin hot rolling H shaped steel to constitute. The supporting rods are made of hot-rolled H-shaped steel, the first layer, the fifth layer and the sixth layer are made of the same supporting cross sections, and the second layer, the third layer and the fourth layer are made of the same supporting cross sections. According to the calculation result, the support rods on the first layer are provided with tension column bases, and the support rods on the second layer to the fifth layer are pressure column bases.
The steel pipe pile cofferdam construction sequence is as follows:
construction preparation → transport of locked steel pipe pile manufacturing (factory) → steel pipe pile measurement and setting-out → steel pipe pile positioning → steel pipe pile splicing and insertion and steel pipe pile vibration and sinking → (rotary drilling) hole drilling and cleaning → steel reinforcement cage lowering → underwater concrete pouring → sand filling in the steel pipe pile → steel pipe pile top stabilization (first vertical and horizontal support supporting) → lock catch filling water-stop material → drainage and simultaneous gradual installation and support → warehouse separation and bottom cleaning and bottom sealing concrete pouring → other main engineering construction (including crack treatment, concrete scabbing, template installation, steel bar erection, concrete pouring and the like) → steel pipe pile cofferdam dismantling.
Installation of enclosing purlin and supporting rod
Working condition 1: mounting a first surrounding purlin and a support at an upstream water level of 77.0m and a downstream water level of 77.0 m;
working condition 2: the upstream water level is 77.0m, the downstream water level is reduced to 74.5m, a second purlin is installed, and horizontal pre-pressure which deviates from the upstream direction and is 6mm away from the vertical center line of the steel pipe is applied to the front of the movable end of the second supporting rod;
working condition 3: fixing a second support and removing the jack, wherein the upstream water level is 77.0m, and the downstream water level is 74.5 m;
working condition 4: the upstream water level is 77.0m, the downstream water level is reduced to 71.5m, a third purlin is installed, and horizontal pre-pressure deviating from the upstream direction and 12mm away from the vertical center line of the steel pipe is applied to the front of the movable end of the third supporting rod;
working condition 5: fixing a third support and removing the jack, wherein the upstream water level is 77.0m, and the downstream water level is 71.5 m;
working condition 6: the upstream water level is 77.0m, the downstream water level is reduced to 68.0m, a fourth purlin is installed, and horizontal pre-pressure which deviates from the upstream direction and is 11mm away from the vertical center line of the steel pipe is applied to the front of the movable end of the fourth supporting rod;
working condition 7: fixing a fourth support and removing the jack, wherein the upstream water level is 77.0m, and the downstream water level is 68.0 m;
working condition 8: an upstream water level is 77.0m, a downstream water level is reduced to 63.5m, a fifth purlin is installed, and horizontal pre-pressure which deviates from the upstream direction and is 2mm away from the vertical center line of the steel pipe is applied to the front of the movable end of the fifth supporting rod;
working condition 9: fixing a fifth support and removing the jack, wherein the upstream water level is 77.0m, and the downstream water level is 63.5 m;
working condition 10: an upstream water level is 77.0m, a downstream water level is reduced to 58.5m, a sixth surrounding purlin is installed, and horizontal pre-pressure with the downstream direction being 2mm away from the vertical center line of the steel pipe is applied to the front of the flexible end of the sixth supporting rod;
working condition 11: fixing a sixth support and removing the jack, wherein the upstream water level is 77.0m, and the downstream water level is 58.5 m;
working condition 12: the upstream water level is 77.0m, the downstream water level is reduced to 56.0m, and the bottom sealing concrete is poured for 4.0m.
At the moment, a steel pipe pile cofferdam supporting system is formed, the upstream dam face main engineering has construction conditions, and the violent collision and disturbance to the supporting system are avoided during the main engineering construction.
The main advantages can be summarized in the following points:
1. conventional steel-pipe pile cofferdam manger plate degree of depth should not superelevation 15m, and the utility model discloses a steel-pipe pile cofferdam manger plate degree of depth can reach 21m, realizes more deep water level manger plate function.
2. Conventional steel-pipe pile cofferdam is confined structure all around, and the utility model discloses a water retaining function can be realized to the unilateral in steel-pipe pile cofferdam, is particularly useful for among the reservoir class engineering, can effectively prevent the releasing of reservoir water resource, guarantees the make full use of water resource, and is not extravagant.
3. The unilateral steel-pipe pile cofferdam saves more investment than the steel-pipe pile cofferdam of arranging all around. Unilateral manger plate structure, steel-pipe pile one side bear the high water pressure of 21m, and the opposite side transmits the support through enclosing the purlin, then supports the water pressure transmission that the steel-pipe pile bore to the dam, realizes the balanced state of steel-pipe pile.
4. The steel pipes are connected together by C9 lock catches. Not only can seal water, but also can ensure that the steel pipes are mutually hooked tightly and firmly.
5. The utility model discloses an effectual adaptation topography and landform of steel-pipe pile cofferdam combines on-the-spot actual conditions, realizes the manger plate function.
All parts which are not discussed in the present application and the connection mode of the parts in the present application belong to the known technologies in the field, and are not described again.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A cofferdam water retaining structure of a steel pipe pile in front of a reservoir dam comprises the reservoir dam and a steel pipe pile cofferdam body, wherein the steel pipe pile cofferdam body comprises a vertical steel pipe pile and a transverse supporting rod;
the device is characterized in that the near end of the support rod is connected with the steel pipe pile; the far end of the support rod is fixedly connected with the inner side surface of the reservoir dam; the bottom end of the steel pipe pile is inserted below a foundation rock surface line of the reservoir;
the steel pipe pile comprises at least two steel pipes arranged side by side, the axes of all the steel pipes are parallel, and the steel pipes are connected together through C9 lock catches.
2. The steel pipe pile cofferdam water retaining structure before the reservoir dam of claim 1, further comprising a surrounding purlin, a seat plate and a tie bar;
the purlin is transversely arranged on the rear side surface of the steel pipe pile; the near end of the supporting rod is connected with the surrounding purlin; the seat plate is fixed on the rear side surface of the steel pipe pile, and the purlin is fixed on the seat plate; the tie bars are splayed diagonal braces, and when the number of the enclosing purlins is more than two, the two enclosing purlins are connected by the tie bars.
3. The cofferdam water retaining structure of the steel pipe piles in front of the reservoir dam as claimed in claim 2, wherein the purlins and the supports are arranged in six layers from top to bottom, wherein the purlins in the first layer, the fifth layer and the sixth layer are of the same section, the purlins in the second layer, the third layer and the fourth layer are of the same section, and the purlins are formed by double-spliced hot-rolled H-shaped steel; the supporting rods are made of hot-rolled H-shaped steel, the first layer, the fifth layer and the sixth layer are made of the same supporting cross sections, and the second layer, the third layer and the fourth layer are made of the same supporting cross sections.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221391165.2U CN217537018U (en) | 2022-06-06 | 2022-06-06 | Steel-pipe pile cofferdam water retaining structure before reservoir dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221391165.2U CN217537018U (en) | 2022-06-06 | 2022-06-06 | Steel-pipe pile cofferdam water retaining structure before reservoir dam |
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| CN217537018U true CN217537018U (en) | 2022-10-04 |
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| CN202221391165.2U Active CN217537018U (en) | 2022-06-06 | 2022-06-06 | Steel-pipe pile cofferdam water retaining structure before reservoir dam |
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- 2022-06-06 CN CN202221391165.2U patent/CN217537018U/en active Active
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