CN213625435U - Foot protection structure suitable for underwater bank slope of offshore deep water wharf - Google Patents

Abstract

The utility model discloses a foot protection structure suitable for an underwater bank slope of a quay-shore deep-water wharf. It comprises a bottom guard and an upper foot guard prism; the bottom guard is laid on the upper foot guard prism and the mud surface under the underwater slope guard; the bottom guard is a non-continuously distributed soft body row of concrete interlocking blocks; The bottom guard includes concrete interlocking blocks and an arrangement; a plurality of the concrete interlocking blocks are arranged on the arrangement. The utility model has the advantages that the utility model can be used in a deep water environment, enhances the stability of the underwater revetment of a quay-shore deep-water wharf, and is easy to construct.

Description

Foot protection structure suitable for underwater bank slope of offshore deep water wharf

Technical Field

The utility model relates to a harbour and channel engineering hydraulic structure design field, more specifically says that it is the banket structure who is applicable to the bank slope under water of following bank formula deep water pier that says so.

Background

The underwater bank protection of the high-pile wharf in the same bank mainly comprises a toe protection and an underwater slope protection. The foot protector has two main functions: firstly, a supporting surface protection structure; secondly, the bottom feet of the revetment are prevented from being scoured, or the revetment still has enough capacity to support the revetment structure when the scouring occurs. The foot protector is preferably provided with a protective bottom to ensure the stability of the foot protector. In the construction of wharves at the middle and lower reaches of the Yangtze river, the bank section where part of wharves are located is in a deep body to force the banks to have complex flow state, the water depth at the front edge of the wharves even reaches more than thirty meters, and due to the limitation of construction conditions such as water depth and the like, the foot protection structure of the underwater bank slope of the deepwater wharves has few alternatives, and usually a riprap prism or riprap and filling bag mixed structure is adopted, but due to the existence of local turbulence and strong flow velocity pulsation, and the superposition effect of flow states such as main stream of a river channel, rotational flow and the like, the riprap prism foot part is easy to be unstable due to the fact that bottom mud is washed, and then the.

As is known, a concrete interlocking block flexible raft is a flexible raft which has the characteristics of edge lifting resistance, stability, adaptability to complex terrains, suitability for larger flow rate, deeper water areas and the like, and is widely applied to bottom protection structures and beach protection structures of waterway revetments, breakwaters, seawalls, spur dikes and the like, but in ultra-deep water environments, particularly complex bank slopes with water depths of over thirty meters, the area of a single raft is usually larger, and unlike general deep water and shallow water pavements, the suspended portion of the raft is longer, so that the suspended weight is larger, and overlarge loads are generated on reinforced belts, arrangement, sliding plates of a paving ship, drum brake mechanisms and the like of the raft, and the conventional paving construction process is not easy to realize. Aiming at the concrete interlocking block soft body row laying operation with the ultra-large water depth of more than thirty meters, the conventional laying ship can realize the laying operation. For the coastal wharf bank slope with deeper water depth, the foot protection structure of the underwater bank protection mostly adopts a riprap prism structure without a bottom protection, so that the phenomenon that the underwater slope protection gradually collapses and slides along with the time is more common.

Therefore, it is needed to develop a foot protection structure that can enhance the stability of the underwater bank protection of the offshore deep water wharf and is easy to construct.

Disclosure of Invention

The utility model aims at providing a banket structure of bank slope under water suitable for following bank formula deep water pier can be used to ultra-deep water environment (the depth of water is more than thirty meters), strengthens the stability of following bank formula deep water pier bank protection under water, easily be under construction, can implement in deep water environment through conventional construction equipment to make this banket structure have the general suitability in deep water environment.

In order to realize the purpose, the technical scheme of the utility model is that: foot guard structure suitable for the underwater bank slope of same-bank formula deep water pier, its characterized in that: comprises a bottom protector and an upper foot protector arris body;

the protection bottom is laid on the upper protection foot arris body and the mud surface under the underwater slope protection bottom; the bottom protector is a concrete interlocking block soft body row which is discontinuously distributed;

the bottom protector comprises concrete interlocking blocks and arrangement; a plurality of said concrete interlocking blocks are arranged on said arrangement.

In the above technical scheme, the arrangement is a composite geotextile; reinforced bands are arranged at intervals on the arrangement.

In the technical scheme, the bottom protector is sequentially divided into the head, the middle section and the residual row along the direction vertical to the water flow.

In the above technical solution, the row head is a row of first interlocking block unit bodies distributed on the arrangement; the first interlocking block unit bodies are concrete interlocking blocks which are continuously distributed;

the row body middle section is a plurality of second interlocking block unit bodies distributed at intervals on the arrangement; the second interlocking block unit bodies are concrete interlocking blocks distributed at intervals in a quincunx manner;

the redundant row is a plurality of third interlocking block unit bodies which are continuously distributed on the arrangement; the third interlocking block unit bodies are concrete interlocking blocks which are continuously distributed.

In the above technical solution, the length of the row head is the length of one group of interlocking block units.

In the technical scheme, the length of the residual rows is 5-10 times of the theoretical scouring depth of the mud surface of the riverbed at the position of the slope toe.

In the technical scheme, the sum of the lengths of the middle section and the head of the row body is 2/3-3/4 of the total length of the sole guard.

In the above technical scheme, the upper foot protection prism is a riprap prism or a riprap and filling bag mixed structure.

The utility model has the advantages of as follows:

(1) the utility model adopts the concrete interlocking block soft body row with non-continuous distribution as the bottom protection adopts the unique quincunx type design of evenly spreading interlocking block unit bodies at intervals due to the optimization in the middle section of the row body, so that the weight of the row body structure is obviously reduced on the premise of ensuring the effective bottom protection effect, thereby reducing the difficulty of deep water laying and arranging, and the utility model also can realize the conventional construction process;

(2) because the concrete interlocking block soft body row is laid under the upper foot protection prism body to serve as the bottom protection, the bottom mud under the foot protection heel is better protected, and the washing damage of various unfavorable flow states such as river bottom flow, local pulsating turbulence and the like is effectively relieved;

(3) the utility model is a structure which can be implemented under deep water condition, and is applied to an underwater bank protection structure of a shore type ultra-deep water (the water depth is more than thirty meters) wharf, which can improve the stability of a bank slope; the utility model discloses the structure also can be applied to other similar deep water revetment fields.

Drawings

Fig. 1 is a plan view of a non-continuously distributed soft row of concrete interlocking blocks according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the structure of the present invention.

In fig. 2, a denotes a dock front deep groove mud surface; b represents the length of the remained row; and C represents a natural bank slope.

In the figure, 100-bottom protection, 101-concrete interlocking blocks, 102-first interlocking block unit bodies, 103-arrangement, 104-second interlocking block unit bodies, 105-third interlocking block unit bodies, 111-row heads, 112-row body middle sections, 113-redundant rows, 200-upper foot protection prism bodies and 300-underwater slope protection.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily appreciated by the description.

With reference to the accompanying drawings: the foot protection structure suitable for the underwater bank slope of the offshore deep water wharf comprises a protection bottom 100 and an upper foot protection prism 200;

the protection bottom 100 is laid on the mud surface under the upper foot protection prism 200 and the underwater slope protection 300;

the bottom guard 100 is a concrete interlocking block soft row which is discontinuously distributed; because the concrete interlocking block soft body row is laid under the upper foot protection prism body to serve as the bottom protection, the bottom mud under the foot protection heel is well protected, and the washing damage of various unfavorable flow states such as river channel bottom flow, local pulsating turbulence and the like is effectively relieved;

the bottom guard 100 comprises concrete interlocking blocks 101 and arrangements 103; a plurality of said concrete interlocking blocks 101 are arranged on said arrangement 103; the specification of the single interlocking block is preferably 480mm multiplied by (120-200) mm, and the concrete strength is preferably C25.

Further, the arrangement 103 is a woven fabric and non-woven fabric needle-punched composite geotextile; ribbed belts are arranged on the arrangement 103 at intervals; the reinforced belt can be made of polypropylene or polypropylene material; the reinforced belts are sewn on the arrangement 103 at certain intervals, and the reinforced belts and the arrangement 103 bear the weight and the water flow force of the drainage body together.

Further, the sole 100 is divided into three regions along the direction perpendicular to the water flow, and the three regions are sequentially divided into a row head 111, a row body middle section 112 and a residual row 113.

The row head 111 is a row of first interlocking block units 102 distributed on the arrangement 103; the first interlocking block unit bodies 102 are continuously distributed concrete interlocking blocks 101;

the row body middle section 112 is a plurality of second interlocking block unit bodies 104 distributed at intervals on the arrangement 103; the second interlocking block unit bodies 104 are concrete interlocking blocks 101 distributed at intervals in a quincunx shape; the middle section of the row body is uniformly distributed in a quincunx manner by taking the interlocking block unit bodies as units, wherein the total area of the blank part can be slightly larger than the area occupied by the interlocking blocks, so that the weight of the row body is reduced, and the difficulty of deep water laying is reduced;

the remainder row 113 is a plurality of third interlocking block unit bodies 105 continuously distributed on the arrangement 103; the third interlocking block unit bodies 105 are concrete interlocking blocks 101 which are continuously distributed.

The first interlocking block unit body 102, the second interlocking block unit body 104 and the third interlocking block unit body 105 are all interlocking block groups formed by pre-connecting a plurality of concrete interlocking blocks together.

Further, the length of the row head 111 is the length of a group (i.e. a row) of the first interlocking block unit bodies 102, and the row head is continuously provided with interlocking blocks, which is beneficial to uniform distribution and stress; the first interlocking block unit 102, the second interlocking block unit 104 and the third interlocking block unit 105 are all adopted for the convenience of field construction, and a plurality of interlocking blocks are prefabricated and connected into an interlocking block group in a factory (field) in advance, and the size depends on the manufacturing and transportation capacity of the factory, and the interlocking block group is usually 4m × 5m or similar in size.

Further, the length of the surplus row 113 is 5-10 times of the theoretical scouring depth of the mud surface of the riverbed at the toe of the slope, the specific length of the surplus row can be calculated according to relevant specifications or determined according to experience, the surplus row has the function of preventing bottom mud from being scoured by water flow, and therefore a certain range needs to be covered, generally, the range needs to meet the requirement of calculating the scouring depth by 5-10 times, and the surplus row is calculated from the outer toe of the riprap prism.

Furthermore, the position deviation of the riprap construction on the riverbed under the deep water condition is larger, in order to ensure that the row body has enough length to be pressed and loaded and fixed under the riprap prism, the sum of the lengths of the row body middle section 112 and the row head 111 is 2/3-3/4 of the total length of the sole 100, so that the condition that the sole is not effectively pressed due to the limitation of the technical level of construction and cannot reach the preset riprap range is prevented, the ballast range of the row body is required to be expanded, and the guarantee rate is improved.

Furthermore, the upper foot protection prism 200 is a riprap prism or a mixed structure of riprap and a filling bag, and the size of the prism, the grain size of the side slope and the lump stone and the like are determined according to the water depth, the flow rate and other factors and according to the relevant standard requirements.

Banket structure suitable for bank slope under water of following bank formula deep water pier obtain through following step:

firstly, before the construction of the adjacent underwater slope protection 300 structure, concrete interlocking block soft body rows (i.e. the bottom protection 100) are laid according to the designed positions, then after the underwater slope protection 300 structure is implemented, the bagged gravel layer in the upper foot protection prism 200 is laid by throwing, and then the covering layer stone throwing layer of the upper foot protection prism 200 is completed.

Examples

The embodiment the banket structure of the underwater bank protection of the bank-following type deep water wharf is a banket structure adopted by a certain wharf project of a Zhang Jia harbor, the wharf is positioned at the bank side of a Yangtze river, a river section deep body forces the bank, the flow state is complex, and the water depth of the front edge reaches more than 35 meters.

As shown in fig. 2, the foot protection structure in this embodiment mainly comprises a non-continuously distributed soft row of concrete interlocking blocks and an upper foot protection prism 200, in this embodiment, the upper foot protection prism 200 comprises a filling bag layer (a bagged crushed stone layer) and a riprap layer, and the adjacent structure is an underwater slope protection 300 structure.

Wherein, concrete interlocking piece software row is laid on the riverbed mud face under upper portion banket arris body 200 bottoms, the outer shoulder of banket arris body need cover extremely the interior boundary of the surplus row 113 of concrete interlocking piece software row, the row head 111 part and the row body middle section 112 part of concrete interlocking piece software row all bury in under upper portion banket arris body 200 and the adjacent bank protection 300 structure under water. The lower layer of the upper foot protection prism 200 is bagged broken stone, and the upper layer is covered by a riprap layer. The upper toe guard ridge 200 is adjacent to the underwater slope protection 300 in the bank side direction and presses the toe of the underwater slope protection 300.

The concrete interlocking block soft mattress in discontinuous distribution described in this embodiment is a soft mattress used for a certain wharf engineering in zhanggang, and mainly includes concrete interlocking blocks 101, arrangement 103, reinforcing strips, etc., and the size of the concrete interlocking block soft mattress is 35m × 40m (length × width), wherein the length of the mattress head is 4m, and the length of the rest mattress is 8 m. According to the manufacturing and construction process of the existing universal concrete interlocking block soft row, firstly, a plurality of concrete interlocking block unit bodies 102 which are connected together by the concrete interlocking blocks 101 are manufactured in a factory, then the interlocking block unit bodies are fixed on a laying ship (a conventional laying ship) according to the requirement in arrangement, and the sinking operation is carried out.

As shown in fig. 1, the concrete interlocking block soft row of the embodiment is divided into a row head 111, a row body middle section 112 and a residual row 113 in the vertical water flow direction, wherein the row head 111 is close to the bank side. The concrete interlocking blocks 101 positioned on the row head 111 and the rest rows 113 are distributed continuously; the concrete interlocking blocks 101 of the row body middle section 112 are uniformly distributed in a quincunx shape by taking the concrete interlocking block unit body 102 as a unit.

In this embodiment, the concrete interlocking block soft row has a specification of 35m × 40m × 120mm (length × width × thickness), the single concrete interlocking block 101 used has a specification of 480mm × 480mm × 120mm (length × width × thickness), and a group of first interlocking block unit cells 102 is pre-connected in a factory by 8 rows and 10 columns of interlocking blocks 101.

And (4) conclusion: the bottom protection in the embodiment adopts the concrete interlocking block soft body row which is discontinuously distributed, so that the weight of the row body structure is obviously reduced on the premise of ensuring the effective bottom protection effect, the deepwater laying difficulty is reduced, and the deep-water laying can be realized by adopting a conventional laying ship and a conventional construction process; meanwhile, in the embodiment, the concrete interlocking block soft body row is paved under the upper foot protection prism body to serve as the bottom protection, so that the bottom mud under the foot protection is well protected, and the washing damage of various unfavorable flow states such as river bottom flow, local pulsating turbulence and the like is effectively relieved. Other parts not described belong to the prior art.

Claims (8)

1. Foot guard structure suitable for the underwater bank slope of same-bank formula deep water pier, its characterized in that: comprises a protective bottom (100) and an upper foot protection prism body (200);

the protective bottom (100) is laid on the mud surface under the upper foot protection prism (200) and the underwater protective slope (300); the bottom protection (100) is a concrete interlocking block soft body row which is discontinuously distributed;

the protective bottom (100) comprises a concrete interlocking block (101) and an arrangement (103); a plurality of said concrete interlocking blocks (101) are arranged on said arrangement (103).

2. The footguard structure of an underwater bank slope adapted to a coastal deep water dock according to claim 1, wherein: the arrangement (103) is a composite geotextile; ribbed belts are arranged at intervals on the arrangement (103).

3. The footguard structure of an underwater bank slope suitable for a coastal deep water dock according to claim 1 or 2, wherein: the bottom guard (100) is sequentially divided into a row head (111), a row body middle section (112) and a residual row (113) along the direction vertical to the water flow.

4. The footguard structure of claim 3, wherein said footguard structure is adapted to be used on an underwater bank slope of a quayside deep water terminal: the row head (111) is a row of first interlocking block unit bodies (102) distributed on the arrangement (103); the first interlocking block unit bodies (102) are continuously distributed concrete interlocking blocks (101);

the row body middle section (112) is a plurality of second interlocking block unit bodies (104) which are distributed on the arrangement (103) at intervals; the second interlocking block unit bodies (104) are concrete interlocking blocks (101) distributed at intervals in a quincunx shape;

the redundant row (113) is a plurality of third interlocking block unit bodies (105) which are continuously distributed on the arrangement (103); the third interlocking block unit bodies (105) are concrete interlocking blocks (101) which are distributed continuously.

5. The footguard structure of claim 4, wherein said footguard structure is adapted to be used on an underwater bank slope of a quayside deep water terminal: the length of the row head (111) is the length of a group of first interlocking block unit bodies (102).

6. The footguard structure of claim 5, wherein said footguard structure is adapted to be used on an underwater bank slope of a quayside deep water terminal: the length of the residual row (113) is 5-10 times of the theoretical scouring depth of the mud surface of the riverbed at the position of the slope toe.

7. The footguard structure of claim 6, wherein said footguard structure is adapted to be used on an underwater bank slope of a quayside deep water terminal: the sum of the lengths of the row body middle section (112) and the row head (111) is 2/3-3/4 of the total length of the sole (100).

8. The footguard structure of claim 7, wherein said footguard structure is adapted to be used on an underwater bank slope of a quayside deep water terminal: the upper foot protection prism (200) is a riprap prism or a mixed structure of riprap and a filling bag.

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