CN216999793U - Alloy string bag cofferdam structure - Google Patents
Alloy string bag cofferdam structure Download PDFInfo
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- CN216999793U CN216999793U CN202220245549.7U CN202220245549U CN216999793U CN 216999793 U CN216999793 U CN 216999793U CN 202220245549 U CN202220245549 U CN 202220245549U CN 216999793 U CN216999793 U CN 216999793U
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Abstract
The utility model belongs to the technical field of water retaining cofferdams, and discloses an alloy string bag cofferdam structure, which comprises a weir body, wherein the weir body at least comprises a weir base and a weir platform, and the weir platform is constructed on the weir base; the water-facing side of the weir base is uniformly distributed with a plurality of alloy string bag slope protection members, the water-facing side of the weir crest is uniformly distributed with a plurality of reinforcement gabion slope protection members, and the reinforcement gabion slope protection members and the alloy string bag slope protection members are filled with stone blocks; the weir base comprises a first stone slag material layer, a second stone slag material layer and a third stone slag material layer which are sequentially filled from the upstream surface to the downstream surface of the weir base, the grain diameter of the stone slag material of the second stone slag material layer is smaller than that of the second stone slag material layer and that of the third stone slag material layer, and the adjacent stone slag material layers are embedded in a zigzag filling structure. The cofferdam has better impact resistance and can improve the firmness of the cofferdam.
Description
Technical Field
The utility model belongs to the technical field of water retaining cofferdams, and particularly relates to an alloy string bag cofferdam structure.
Background
The cofferdam is a temporary enclosure structure constructed for constructing a permanent water conservancy facility in the construction of water conservancy projects, and has the functions of preventing water and soil from entering the construction position of a building so as to drain water in the cofferdam, excavate a foundation pit and construct the building; the cofferdam is mainly used in hydraulic buildings in general, except for being used as a part of a formal building, the cofferdam is generally dismantled after being used up, and the height of the cofferdam is higher than the highest water level which can appear in the construction period; the cofferdam can be used for preventing water and enclosing water and can also be used for supporting the pit wall of the foundation pit.
Most of the conventional cofferdams are of one-layer structures, filled slag is single, and even if multiple layers of filled cofferdams are poor in structural firmness, the water retaining performance and firmness of the cofferdams are insufficient, the service life of the cofferdams is short, and frequent maintenance is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an alloy string bag cofferdam structure, which solves the problem that the cofferdam is poor in firmness and water retaining property.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an alloy string bag cofferdam structure comprises a weir body, wherein the weir body at least comprises a weir base and a weir platform, and the weir platform is constructed on the weir base;
the water-facing side of the weir base is uniformly distributed with a plurality of alloy string bag slope protection members, the water-facing side of the weir crest is uniformly distributed with a plurality of reinforcement gabion slope protection members, and the reinforcement gabion slope protection members and the alloy string bag slope protection members are filled with stone blocks;
the weir base comprises a first stone slag material layer, a second stone slag material layer and a third stone slag material layer which are sequentially filled from the upstream surface to the downstream surface of the weir base, the grain diameter of the stone slag material of the second stone slag material layer is smaller than that of the second stone slag material layer and that of the third stone slag material layer, and the adjacent stone slag material layers are embedded in a zigzag filling structure.
In a possible implementation manner, a plurality of embedded pieces are arranged between two adjacent ballast material layers along the structural direction of the filling structure, each embedded piece is provided with two opposite embedded sides, each embedded side is provided with an embedded part, and the embedded parts are embedded into the ballast material layers on the side where the embedded parts are located.
In a possible implementation manner, the embedding part comprises a plurality of parallel embedding plates, and two adjacent embedding plates are arranged at intervals.
In a possible implementation mode, a plastic concrete impervious wall is arranged in the second stone ballast layer, and the bottom end of the plastic concrete impervious wall extends towards the direction of the riverbed and is connected with a wall lower curtain formed by pouring in the bedrock of the riverbed.
In a possible implementation, the top of the plastic concrete impervious wall is provided with a cap concrete member.
In a possible implementation manner, the weir crest comprises a composite geotextile buried in the center of the weir crest, and a padding layer, a transition layer and a fourth ballast layer which are symmetrically and sequentially filled on two sides of the composite geotextile.
In a possible implementation, the bottom end of the composite geotextile is connected with the cap concrete member.
In a possible implementation manner, the top of the weir crest is provided with a pressing top, and the bottom of the pressing top is connected with the top end of the composite geotextile.
In a possible implementation mode, the particle size range of the stone blocks of the reinforcement gabion slope protection member is 25-80 cm.
In a possible implementation mode, the particle size range of the stone blocks of the alloy net bag slope protection component is 30-70 cm.
Compared with the prior art, the utility model has the following beneficial effects:
according to the alloy string bag cofferdam structure, the cofferdam is provided with the two-layer structure, the slope protection structure of the reinforcement gabion and the alloy string bag is arranged on the water facing side, so that the cofferdam has better impact resistance, the firmness of the cofferdam can be improved, the weir base is composed of a plurality of stone slag layers, the two adjacent stone slag layers are embedded through the zigzag filling structure, and the formed weir base structure is more stable.
Moreover, through set up the gomphosis piece between two stone sediment layers for can relatively fixed between the stone sediment layer, can avoid the stone sediment layer problem that the delaminating appears easily at long-time manger plate in-process, further improve the steadiness of cofferdam weir base.
In addition, the water retaining property and the seepage preventing property of the cofferdam can be effectively improved through seepage preventing and water retaining structures such as plastic concrete seepage preventing walls, under-wall curtains, composite geotextiles and the like.
Drawings
Fig. 1 is a schematic structural view of an alloy string bag cofferdam structure according to an embodiment of the application;
fig. 2 is a schematic structural diagram of a weir body of an alloy string bag cofferdam structure according to an embodiment of the application;
fig. 3 is a side view of a fitting part of an alloy string bag cofferdam structure according to an embodiment of the present application.
In the figure: 1-a weir base; 11-a third stone ballast layer; 12-a second ballast layer; 13-a first stone ballast layer; 14-a fitting; 141-an embedded plate; 2-a weir platform; 21-a fourth stone ballast layer; 22-a transition material layer; 23-a padding layer; 24-composite geotextile; 3-pressing the top; 4-reinforcing steel bar gabion slope protection member; 5-alloy string bag slope protection components; 6-plastic concrete impervious wall; 7-curtain under wall; 8-bedrock; 9-riverbed.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
The utility model is further described with reference to the following figures and specific examples.
Referring to fig. 1 and 2, an embodiment of the present application provides an alloy string bag cofferdam structure, including a weir body, where the weir body at least includes a weir base 1 and a weir platform 2, and the weir platform 2 is constructed on the weir base 1; the alloy string bag cofferdam structure is of an upper-lower layered structure, a weir platform 2 is constructed on a weir base 1 and forms a cofferdam structure with a triangular section, the left side of the cofferdam structure is a water-facing side in a corresponding figure 1, and the right side of the cofferdam structure is a backwater side.
A plurality of alloy string bag slope protection members 5 are uniformly distributed on the water-facing side of the weir base 1, a plurality of reinforcement gabion slope protection members 4 are uniformly distributed on the water-facing side of the weir crest 2, and block stones are filled in the reinforcement gabion slope protection members 4 and the alloy string bag slope protection members 5; alloy string bag bank protection component 5 and reinforcing bar gabion bank protection component 4 can constitute the slope protection structure to the side of meeting water in the cofferdam to can protect weir base 1 and weir platform 2 respectively through two kinds of different bank protection components like this, and its slope protection nature of alloy string bag bank protection component 5 is higher with intensity, can carry out effectual protection to weir base 1.
The weir base 1 comprises a first stone ballast layer 13, a second stone ballast layer 12 and a third stone ballast layer 11 which are filled in sequence from the upstream surface to the downstream surface, the grain diameter of the stone ballast of the second stone ballast layer 12 is smaller than that of the stone ballast of the second stone ballast layer 12 and that of the third stone ballast layer 11, and the adjacent stone ballast layers are embedded in a zigzag filling structure. Constitute weir base 1 through the slabstone bed of multilayer to through the structure of filling with the cockscomb structure fill the slabstone bed, can make the stability between the slabstone bed better, the condition of delaminating is difficult to appear, and through the slabstone bed of thinly just middle, can play better water retaining effect.
Referring to fig. 2 and 3, in one embodiment, in order to further facilitate delamination of the ballast layers of the weir base 1, a plurality of engaging members 14 are disposed between two adjacent ballast layers along the structural direction of the filling structure, each engaging member 14 has two opposite engaging sides, each engaging side is provided with an engaging portion, and the engaging portion is engaged in the ballast layer on the side where the engaging portion is located.
The embedded member 14 can be inserted into the corresponding rock ballast layer through the embedded parts at two sides thereof, so that the rock ballast layer is not easy to move relatively, the delamination can be further prevented, and the stability of the cofferdam is better.
Further, the insertion portion includes a plurality of insertion plates 141 that are parallel to each other, and two adjacent insertion plates 141 are spaced apart from each other. With the structure, the embedded part 14 can limit and fix two adjacent stone slag material layers more effectively through the embedded plates 141 on the two sides, and the effect is better.
In the embodiment of the application, a plastic concrete impervious wall 6 is arranged in the second stone ballast material layer 12, and the bottom end of the plastic concrete impervious wall 6 extends towards the riverbed 9 and is connected with a wall lower curtain 7 poured in bedrock 8 of the riverbed 9.
The plastic concrete impervious wall 6 is used for seepage prevention, is positioned on the axis of the weir body, extends towards the direction of the riverbed 9, extends to bedrock 8 of the riverbed 9 and is connected with a wall lower curtain 7 poured in the bedrock 8 into a whole, so that the seepage prevention of the weir body is realized.
Further, in order to protect the plastic concrete impermeable wall 6, a cap concrete member is provided on the top of the plastic concrete impermeable wall 6.
In an embodiment of the weir platform 2, the weir platform 2 includes a composite geotextile 24 buried in the center thereof, and a padding layer 23, a transition layer 22 and a fourth ballast layer 21 symmetrically and sequentially filled on both sides of the composite geotextile 24.
Thus, the utility model can effectively prevent the water seepage of the weir body from being discharged when the water is flushed for a long time without the loss of the earthwork for filling the weir body.
Specifically, the bottom end of the composite geotextile 24 is connected with the cap concrete member. This allows the composite geotextile 24 to be connected to the cap concrete member for more continuous seepage control.
Further, the top of the weir crest 2 is provided with a coping 3, and the bottom of the coping 3 is connected with the top end of the composite geotextile 24. Therefore, the weir body can effectively prevent seepage through the composite geotextile 24 and the plastic concrete seepage-proofing wall 6, and the seepage-proofing effect and the water retaining effect are improved.
In a specific implementation process, the particle size range of the stone blocks of the reinforcement gabion slope protection member 4 is 25-80 cm; the particle size range of the stone blocks of the alloy string bag slope protection member 5 is 30-70 cm.
The preferred embodiment:
the weir body adopts geomembrane core wall seepage prevention above the actually required laying elevation, the height of the geomembrane core wall seepage prevention body is 2.5-5.5 m, and sand gravel cushion layers (namely padding layers 23) with the thickness of 1.5m (horizontal width) and transition layers with the thickness of 1.5m (horizontal width) are respectively arranged on two sides of the geomembrane. The weir body and the foundation below the elevation adopt a plastic concrete impervious wall 6 for seepage prevention, and the axis of the impervious wall is consistent with the axis of the cofferdam. The diaphragm wall has the thickness of 0.8m and the maximum depth of about 49.5m, and the depth of the diaphragm wall in the bedrock 8 is not less than 1.5 m.
The padding layer 23, the transition layer 22 and the adjacent layers have well defined boundaries of the filler. When the building is paved in sections, all layers at the joint are well connected, the phenomenon of interlaminar dislocation or fracture is prevented, and the transverse joint on the inclined plane is reduced into a slope which is 1: 2. The cushion material layer 23 is connected to the transition material layer 22 by zigzag-shaped filling, but it is necessary to ensure that the cushion material layer is not encroached on the design thickness, and the engaging pieces 14 can be provided. When the transition material layer 22 is connected with the fourth stone ballast material layer 21, zigzag filling is also adopted, and the design thickness of the transition material layer 22 is ensured not to be invaded. The dry volume weight of the compacted transition material meets the requirement of design indexes.
The size of the reinforcement gabion is 2 multiplied by 1m (length multiplied by width multiplied by height). Skeleton reinforcing bar (main muscle) is B22 mm's second grade twisted steel, and the interval is 50cm, and the secondary muscle adopts the diameter to be A6mm round steel, interval 10 cm. The reinforcement gabion is processed in advance according to design drawings in a processing factory (a temporary processing factory is arranged in the range of a first-stage engineering foundation pit in the early stage), and a truck is transported to the site.
The alloy net bag is a high alloy net bag, and adopts finished products (the stone loading amount is not less than 5 m) ordered by manufacturers according to the strict requirements of design drawings3) And filling the rock blocks on site, sealing the opening, and hoisting and throwing in place.
The stone blocks filled in the reinforcement gabion or the alloy net bag are hard, the range of the stone blocks of the reinforcement gabion is 25-80 cm, and the range of the stone blocks of the alloy net bag is 30-70 cm.
The construction method of the reinforcement gabion comprises the following steps: according to design drawing reinforcing bar gabion slope protection structure lie in the weir body (be weir platform 2) upstream face above cut-off wall construction platform, consequently treat that the upper portion weir body is filled and is accomplished the back, adopt the back shovel to maintain domatic accepted qualification back, artifical with the back shovel according to the design structure requirement reinforcing bar gabion of taking one's place, fill the block stone according to the design requirement by the manual work and go into the cage, the block stone is filled and is carried out the gabion top cap after accomplishing and seal, seal reinforcing bar net and lower part steel reinforcement cage structure and need be according to the design requirement welded connection firm. The construction is carried out layer by layer or section by section in a circulating way.
The construction method of the alloy string bag slope protection structure comprises the following steps: according to the requirement of design drawings, the high-alloy net bag protection area is as follows: the bottom of the side close to the river and the slope surface below the impervious wall construction platform (namely a weir base 1) (the range of the bottom protection is 10m away from a slope foot, 3 layers are laid at the corner reinforcing sections of the upper part and the lower part of the cofferdam, 2 layers are laid at the straight section range), the weir body structure below the residual impervious wall construction platform is synchronously organized and constructed section by section after the cofferdam is filled out of the water surface, and the layer-by-layer staggered lamination mode is carried out layer by layer according to the principle that the position is upstream from the lower part and the position is near from the side close to the river (the lamination width of the alloy tuck nets between the layers is not less than 35 cm). Firstly, manually filling and sealing the rock block on the weir body filling working face adjacent to the filled water surface by a backhoe, and then performing throwing filling and building. Wherein the throwing and filling area below the water surface is lifted to a preset design position by a back shovel; and (4) throwing and filling the area above the water surface, before throwing and filling, after finishing the slope surface by adopting a back shovel and passing the acceptance, throwing and filling the high alloy string bag which is filled with the rock blocks and sealed to a preset design position by adopting the back shovel. The construction is carried out layer by layer or section by section in a circulating way.
And (3) adopting the composite geomembrane core wall for seepage control, connecting the bottom of the geomembrane with the cap concrete at the top of the impervious wall, and connecting the geomembrane in the reserved tooth grooves of the cap concrete by adopting nuts.
Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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 (10)
1. The utility model provides an alloy string bag cofferdam structure, includes the weir body, its characterized in that: the weir body at least comprises a weir base (1) and a weir platform (2), and the weir platform (2) is constructed on the weir base (1);
the water-facing side of the weir base (1) is uniformly distributed with a plurality of alloy string bag slope protection members (5), the water-facing side of the weir crest (2) is uniformly distributed with a plurality of reinforcement gabion slope protection members (4), and the reinforcement gabion slope protection members (4) and the alloy string bag slope protection members (5) are filled with stone blocks;
the weir base (1) comprises a first stone slag material layer (13), a second stone slag material layer (12) and a third stone slag material layer (11) which are sequentially filled from the upstream surface to the downstream surface of the weir base, the grain size of the stone slag material of the second stone slag material layer (12) is smaller than that of the second stone slag material layer (12) and that of the third stone slag material layer (11), and the adjacent stone slag material layers are embedded in a zigzag filling structure.
2. The alloy string bag cofferdam structure of claim 1, wherein: a plurality of embedded pieces (14) are arranged between two adjacent stone slag material layers along the structural direction of the filling structure, each embedded piece (14) is provided with two opposite embedded sides, each embedded side is provided with an embedded part, and the embedded parts are embedded into the stone slag material layers on the side where the embedded parts are located.
3. The alloy string bag cofferdam structure of claim 2, wherein: the embedded part comprises a plurality of parallel embedded plates (141), and two adjacent embedded plates (141) are arranged at intervals.
4. The alloy string bag cofferdam structure of any one of claims 1-3, wherein: and a plastic concrete impervious wall (6) is arranged in the second stone ballast material layer (12), and the bottom end of the plastic concrete impervious wall (6) extends towards the riverbed (9) and is connected with a wall lower curtain (7) which is formed by pouring in bedrock (8) of the riverbed (9).
5. The alloy string bag cofferdam structure of claim 4, wherein: and a cap concrete member is arranged at the top of the plastic concrete impervious wall (6).
6. The alloy string bag cofferdam structure of claim 5, wherein: the weir crest (2) comprises a composite geotextile (24) embedded in the center of the weir crest, and a padding layer (23), a transition layer (22) and a fourth stone ballast layer (21) which are symmetrically and sequentially filled on two sides of the composite geotextile (24).
7. The alloy string bag cofferdam structure of claim 6, wherein: the bottom end of the composite geotextile (24) is connected with the cap concrete component.
8. The alloy string bag cofferdam structure of claim 7, wherein: the top of the weir crest (2) is provided with a coping (3), and the bottom of the coping (3) is connected with the top end of the composite geotextile (24).
9. The alloy string bag cofferdam structure of claim 1, wherein: the particle size range of the stone blocks of the reinforcement gabion slope protection member (4) is 25-80 cm.
10. The alloy string bag cofferdam structure of claim 1, wherein: the particle size range of the stone blocks of the alloy net bag slope protection component (5) is 30-70 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220245549.7U CN216999793U (en) | 2022-01-28 | 2022-01-28 | Alloy string bag cofferdam structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220245549.7U CN216999793U (en) | 2022-01-28 | 2022-01-28 | Alloy string bag cofferdam structure |
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| CN216999793U true CN216999793U (en) | 2022-07-19 |
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| CN202220245549.7U Active CN216999793U (en) | 2022-01-28 | 2022-01-28 | Alloy string bag cofferdam structure |
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