CN219157547U - Combined bottom protection structure based on deep water complex flow state condition - Google Patents
Combined bottom protection structure based on deep water complex flow state condition Download PDFInfo
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- CN219157547U CN219157547U CN202222950129.1U CN202222950129U CN219157547U CN 219157547 U CN219157547 U CN 219157547U CN 202222950129 U CN202222950129 U CN 202222950129U CN 219157547 U CN219157547 U CN 219157547U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000004576 sand Substances 0.000 claims abstract description 29
- 238000009991 scouring Methods 0.000 claims abstract description 10
- 239000004575 stone Substances 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 26
- 239000010410 layer Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 2
- 239000004745 nonwoven fabric Substances 0.000 claims description 2
- 210000002435 tendon Anatomy 0.000 claims 2
- 238000007789 sealing Methods 0.000 claims 1
- 239000002759 woven fabric Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 238000012876 topography Methods 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 description 27
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a combined bottom protection structure based on a deep water complex flow state condition, which relates to the technical field of hydraulic engineering and comprises a sand filled geotechnical pillow filled in a scouring pit at the bottom of a river bed, a soft mattress fully paved in a bottom protection area and covering the sand filled geotechnical pillow, and a stone throwing carrier ballasted on the soft mattress. The bottom protection structure can adapt to the complex riverbed topography under the deep water condition, and has the advantages of high laying safety, stable structure and good bottom protection effect.
Description
Technical Field
The utility model relates to the technical field of hydraulic engineering, in particular to a combined bottom protection structure based on a deep water complex flow state condition.
Background
The bottom protection soft mattress has the functions of sand isolation and reverse filtration, can effectively protect a foundation bed in a coverage area from being washed, has the characteristics of good integrity, strong deformation capacity of a river bed and the like, and is widely applied to river channel remediation engineering as a bottom protection structure.
The traditional bottom protection soft mattress is paved with water depth under 25m, less research on the bottom protection structure of the mattress under the deep water complex flow state condition with water depth exceeding 30m, no general shaping product, the bottom protection structure design standardization degree is low, the bottom protection effect is uneven and the tearing phenomenon occurs completely depending on the level and experience of a designer in the actual engineering, and under the severe condition of the deep water complex flow state, a river bed always has larger scouring pits, so that the height fluctuation of the river bed is larger and the water flow is disturbed. The row body is complicated and uneven under gravity and water movement pressure effect in the laying process, and there is a huge risk of tearing the row, and in case the tearing of the row occurs, not only economic loss can be caused and the construction period is delayed, but also the violent shaking of the laying ship can be caused, and the safety of ships and personnel is threatened. After the bottom protection engineering is completed, the drain body is washed by uneven water flow, the bottom protection structure is easy to lift and lose efficacy, and the expected effect cannot be achieved.
Therefore, the combined bottom protection structure is suitable for the deep-water complex flow state based condition, and the bottom protection structure can solve the problems of poor bottom protection effect, unsafe laying and the like in the deep-water complex flow state.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the utility model provides a combined bottom protection structure based on the deep water complex flow state condition, which solves the problems of poor bottom protection effect, unsafe paving and the like under the deep water complex flow state.
(II) technical scheme
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
a combined bottom protection structure based on deep water complex flow state condition comprises a sand filled geotechnical pillow filled in a scouring pit at the bottom of a river bed, a soft mattress fully paved in a bottom protection area and covering the sand filled geotechnical pillow, and a stone throwing compression carrier ballasted on the soft mattress.
Preferably, the pillow bag for the sand filled geotechnical pillow is sewn by polypropylene woven cloth, and longitudinal ribs and annular ribs are respectively arranged in the longitudinal ring direction of the pillow bag of the sand filled geotechnical pillow.
Preferably, the longitudinal reinforcement bars are closed for 2 circles along the length of the pillow bag of the sand filling engineering pillow, and the spacing between the circumferential reinforcement bars is 1m.
Preferably, the soft mattress is formed by compounding woven cloth and non-woven cloth.
Preferably, the soft mattress is longitudinally provided with double-layer main stress reinforcement bars and transversely provided with single-layer structure reinforcement bars to form a longitudinal and transverse reinforcement net.
Preferably, the main stress reinforcement bars are arranged at intervals of 25cm, and the structural reinforcement bars are arranged at intervals of 50cm.
Preferably, a circle of double-layer additional strengthening ribs are arranged on the periphery of the soft mattress.
Preferably, the soft mattress is provided with C20 plain concrete precast blocks, and the longitudinal and transverse spacing of the C20 plain concrete precast blocks is 50cm.
Preferably, the long side of the C20 plain concrete precast block is provided with a groove, and a tying belt which is respectively connected with the main stress reinforcement bar and the structural reinforcement bar is tied in the groove.
Preferably, the thickness of the riprap pressing carrier is 1m, a riprap ballast reinforcing belt paved along the vertical water flow direction is arranged on the riprap pressing carrier, the bandwidth of the riprap ballast reinforcing belt is 10-20 m, and the thickness of the riprap ballast reinforcing belt is 1.5m on the basis of the 1m thick riprap pressing carrier.
(III) beneficial effects
The utility model provides a combined bottom protection structure based on a deep water complex flow state condition. Compared with the prior art, the method has the following beneficial effects:
filling the pit position of the river bottom scour in the bottom protection area with a sand filling geotechnical pillow to reduce the pit depth of the river and improve the water flow state near the river bed; fully paving soft mattress in the bottom protection area, having sand isolation and reverse filtering functions, and protecting the foundation bed in the coverage area from being washed; the ballast is carried out on the soft raft, so that the stability of the soft raft is ensured, the water flow is prevented from flushing and lifting the raft, and meanwhile, the river bed roughness can be increased, and the river bed siltation is promoted. The bottom protection structure can adapt to the complex riverbed topography under the deep water condition, and has the advantages of high laying safety, stable structure and good bottom protection effect.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic side view of a bottom guard structure in the present embodiment;
FIG. 2 is a schematic diagram of the front structure of the sand filled geotechnical pillow in this embodiment;
FIG. 3 is a schematic side view of the sand filled geopillow of the present embodiment;
FIG. 4 is a schematic diagram of the structure of the software bar in the present embodiment;
fig. 5 is a schematic structural view of a C20 plain concrete prefabricated block in this embodiment.
1, filling a sand soil work pillow; 11. a cuff; 12. annular reinforcement strips; 13. longitudinal ribbing; 2. a soft mattress; 21. main stress rib adding; 22. constructing reinforcing ribs; 23. adding a forced rib; 24. c20 plain concrete precast blocks; 241. a groove; 25. tying the belt; 3. polishing and pressing a carrier; 31. the ballast is a reinforced belt.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model are clearly and completely described, and it is obvious that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
According to the combined bottom protection structure based on the deep water complex flow state condition, the problems of poor bottom protection effect, unsafe paving and discharging and the like under the deep water complex flow state are solved, and the purposes of high paving safety, stable structure and good bottom protection effect are achieved.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1, a combined bottom protection structure based on deep water complex flow state condition comprises a sand filled geotechnical pillow 1, a soft mattress 2 and a stone throwing carrier 3. The sole guard range is about 300m×900m.
Referring to fig. 2 and 3, the sand-filled geotechnical pillow 1 is filled in a scouring pit at the bottom of a river bed, and the scouring pit is filled and leveled to reduce the depth of the scouring pit of the river bed so as to avoid water flow disturbance caused by larger fluctuation of the height of the bottom of the river bed. The pillow bags of the sand filled geotechnical pillow 1 are sewn by polypropylene woven cloth, the diameter of each single sand filled geotechnical pillow bag is 1.2m, the length is 5 m-8 m, and 2 cuffs 11 with the diameter of 20cm are arranged on each pillow bag and are used as inlets for filling river sand;
the longitudinal annular direction of the geopillow bag of the sand filled geopillow 1 is respectively provided with annular ribs 12 and longitudinal ribs 13, the weight of the unit length of the annular ribs 12 is not less than 27g/m, the width is 3cm, the tensile strength is more than 3 kN/root, and the interval between the adjacent annular ribs 12 is 1m. The weight of the longitudinal ribbing 13 per unit length is not less than 46g/m, the width is 5cm, the tensile strength is more than 5 kN/root, and the longitudinal ribbing 13 is uniformly sealed for 2 circles along the length direction of the geotechnical pillow bag. The longitudinal annular reinforcement technology improves the stress condition of the geotechnical pillow bags and greatly reduces the bag breaking rate.
Referring to FIG. 4, the mattress row 2 mattress passes through 350g/m 2 Woven cloth and 150g/m 2 The non-woven fabric is compounded, has the functions of sand separation and reverse filtration, and can effectively protect the foundation bed in the coverage area from being washed. The soft mattress 2 is longitudinally provided with double-layer main stress reinforcing ribs 21, and transversely provided with reinforcing ribs 22 with a single-layer structure to form a longitudinal and transverse reinforcing mesh, so that the mattress strength is improved, and the stress performance is enhanced;
the main stress reinforcing ribs 21 are double-layer polypropylene reinforcing ribs, the width is 7cm, the distance between every two adjacent main stress reinforcing ribs 21 is 25cm, and the double-layer structure is arranged because the longitudinal direction is the main stress direction of the soft mattress 2, and the double-layer structure is beneficial to strengthening the stress performance of the soft mattress 2, so that the safety of the paving process of the soft mattress 2 is improved;
the structural reinforcement ribs 22 are single-layer polypropylene reinforcement ribs, the width is 7cm, the spacing between adjacent structural reinforcement ribs 22 is 50cm, and the single-layer structure is arranged because the transverse direction is not the stress direction of the soft mattress 2, and the single-layer structure can form a reinforcement net with the main stress reinforcement ribs 21 on one hand, so that the stress performance of the soft mattress 2 is enhanced, and on the other hand, the cost can be saved;
the periphery of the soft mattress 2 is also provided with a circle of double-layer reinforcing ribs 23, the reinforcing ribs 23 are polypropylene reinforcing ribs, the width is 10cm, and the double-layer reinforcing ribs 23 are arranged to prevent the mattress body from tearing due to stress concentration at the edges of the mattress body due to the stress concentration phenomenon at the periphery of the mattress body, so that the safety of the paving process of the soft mattress 2 is improved;
referring to FIG. 5, the C20 plain concrete precast blocks 24 are ballasted on the soft mattress 2, the dimensions of the C20 plain concrete precast blocks 24 are 40cm×30cm×10cm (length×width×thickness), 2 grooves 241 with widths of 5cm and depths of 7cm are formed on the long sides of the C20 plain concrete precast blocks, tie bars are tied in the grooves 241, the tie bars connect the C20 plain concrete precast blocks 24 on the main stress reinforcement bars 21 and the structural reinforcement bars 22 of the soft mattress 2 respectively, and the distances between the C20 plain concrete precast blocks 24 on the main stress reinforcement bars 21 and the structural reinforcement bars 22 are 50cm. The main function of the C20 plain concrete precast block 24 is to provide basis weight for the row bodies, ensure the stability and safety of the row bodies in the laying and arranging process, and simultaneously stabilize the row bottoms in the subsequent long-term use, so that the row bottoms have excellent bottom protection effect for a long time.
Referring to fig. 1, the thickness of the stone-polishing press carrier 3 is 1m, so as to improve the stability of the soft mattress 2, prevent water flow from scouring and lifting, increase the roughness of the river bed and promote the river bed to be deposited;
the riprap ballast reinforcing belts 31 are arranged on the riprap ballast carrier 3, 4 riprap ballast reinforcing belts 31 are paved along the vertical water flow direction, the bandwidth is 10 m-20 m, and the thickness is 1.5m on the basis of the riprap ballast carrier 3. The ballast reinforcing belt 31 is used for enhancing the ballast effect of the ballast, further improving the stability of the soft segment 2.
The implementation principle of the utility model is as follows: firstly, filling up scouring pits at the bottom of a river bed by using a sand filled geotechnical pillow 1, and arranging annular reinforcement bars 12 and longitudinal reinforcement bars 13 on a geotechnical pillow bag to improve the stress condition of the pillow bag, so that the bag breaking rate is greatly reduced; the soft mattress 2 covering the sand-filled geotechnical pillow 1 is fully paved at the bottom of the river bed in the bottom protection area, longitudinal main stress reinforcement ribs 21 and transverse structure reinforcement ribs 22 are arranged on the soft mattress 2 to form a longitudinal and transverse reinforcement net, compared with the traditional soft mattress 2 with only longitudinal reinforcement ribs, the stress condition is remarkably improved, the advantages are obvious under the deep water complex flow state condition, the reinforcement ribs 23 are arranged at the periphery of the soft mattress 2, the C20 plain concrete precast blocks 24 are tied on the mattress of the soft mattress 2, the paving stability and the safety of the soft mattress 2 are improved, and the long-term usability of the soft mattress is improved; and finally, a riprap pressing carrier 3 is paved on the soft raft 2, and a riprap ballast reinforcing belt 31 is paved on the riprap pressing carrier 3, so that water flow scouring is prevented, the drainage is prevented, the river bed roughness is increased, and river bed siltation is promoted.
In summary, compared with the prior art, the method has the following beneficial effects:
filling the pit position of the river bottom scour in the bottom protection area with a sand filling geotechnical pillow to reduce the pit depth of the river and improve the water flow state near the river bed; fully paving soft mattress in the bottom protection area, having sand isolation and reverse filtering functions, and protecting the foundation bed from being washed in the bottom protection range; the ballast is carried out on the soft raft, so that the stability of the soft raft is ensured, the water flow is prevented from flushing and lifting the raft, and meanwhile, the river bed roughness can be increased, and the river bed siltation is promoted. The bottom protection structure can adapt to the complex riverbed topography under the deep water condition, and has the advantages of high laying safety, stable structure and good bottom protection effect.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (8)
1. The combined type bottom protection structure based on the deep water complex flow state condition is characterized by comprising a sand filled geotechnical pillow (1) filled in a scouring pit at the bottom of a river bed, a soft row (2) fully paved in a bottom protection area and covering the sand filled geotechnical pillow, and a stone throwing carrier (3) ballasted on the soft row (2), wherein a pillow bag used for the sand filled geotechnical pillow (1) is sewn by a polypropylene woven cloth, annular ribs (12) and longitudinal ribs (13) are respectively arranged in the longitudinal direction of the pillow bag of the sand filled geotechnical pillow (1), and double-layer main stress ribs (21) and single-layer structure ribs (22) are longitudinally arranged in the soft row (2) to form a longitudinal and transverse rib adding net.
2. The combined bottom protection structure based on the deep water complex flow state condition as claimed in claim 1, wherein the spacing between the annular reinforcing ribs (12) is 1m, and the longitudinal reinforcing ribs (13) are used for sealing and reinforcing 2 circles along the length of the pillow bag of the sand filling engineering pillow.
3. The combined bottom protection structure based on the deep water complex flow state condition according to claim 1, wherein the soft mattress (2) is formed by compounding woven fabrics and non-woven fabrics.
4. A combined bottom guard structure based on deep water complex flow regime as claimed in claim 1, wherein the main stress tendons (21) are arranged 25cm apart and the structural tendons (22) are arranged 50cm apart.
5. The combined bottom protection structure based on the deep water complex flow state condition as claimed in claim 1, wherein a circle of double-layer forced ribs (23) are arranged around the soft mattress (2).
6. The combined bottom protection structure based on the deep water complex flow state condition as claimed in claim 1, wherein the soft mattress (2) is tied with C20 plain concrete precast blocks (24), and the longitudinal and transverse spacing of the C20 plain concrete precast blocks (24) is 50cm.
7. The combined bottom protection structure based on the deep water complex flow state condition as claimed in claim 6, wherein a groove (241) is formed on the long side of the C20 plain concrete precast block (24), and a tying band (25) respectively connected with the main stress reinforcing rib (21) and the structural reinforcing rib (22) is tied in the groove (241).
8. The combined bottom protection structure based on the deep water complex flow state condition according to claim 1, wherein the thickness of the riprap pressing carrier (3) is 1m, a riprap ballast reinforcing belt (31) paved along the vertical water flow direction is arranged on the riprap pressing carrier (3), the bandwidth of the riprap ballast reinforcing belt (31) is 10 m-20 m, and the thickness of the riprap ballast reinforcing belt is 1.5m on the basis of the 1m thick riprap pressing carrier (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222950129.1U CN219157547U (en) | 2022-11-05 | 2022-11-05 | Combined bottom protection structure based on deep water complex flow state condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222950129.1U CN219157547U (en) | 2022-11-05 | 2022-11-05 | Combined bottom protection structure based on deep water complex flow state condition |
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| Publication Number | Publication Date |
|---|---|
| CN219157547U true CN219157547U (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222950129.1U Active CN219157547U (en) | 2022-11-05 | 2022-11-05 | Combined bottom protection structure based on deep water complex flow state condition |
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| Country | Link |
|---|---|
| CN (1) | CN219157547U (en) |
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2022
- 2022-11-05 CN CN202222950129.1U patent/CN219157547U/en active Active
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Address after: No.185, Haitang Road, Hefei hi tech Development Zone, Anhui Province, 230088 Patentee after: Anhui water conservancy and hydropower survey and design research institute Co.,Ltd. Country or region after: Zhong Guo Address before: No.185, Haitang Road, Hefei hi tech Development Zone, Anhui Province, 230088 Patentee before: Anhui water resources and Hydropower Survey, design and Research Institute Co.,Ltd. Country or region before: Zhong Guo |