CN117738247B - Pile foundation scour prevention device and method for water engineering - Google Patents
Pile foundation scour prevention device and method for water engineering Download PDFInfo
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- CN117738247B CN117738247B CN202410184877.4A CN202410184877A CN117738247B CN 117738247 B CN117738247 B CN 117738247B CN 202410184877 A CN202410184877 A CN 202410184877A CN 117738247 B CN117738247 B CN 117738247B
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Abstract
The invention relates to a pile foundation scour prevention device and method for water engineering, which belong to the technical field of water foundation pile protection and comprise a sand accumulation assembly and a blocking wall; the blocking wall is arranged around the foundation pile, a reinforcing space is formed between the blocking wall and the foundation pile, and the product Sha Zujian is arranged in the reinforcing space; the baffle wall is provided with the water conservancy diversion passageway, the water conservancy diversion passageway has seted up the inlet at the upstream face of baffle wall and has seted up the drain outlet in upstream face both sides, the baffle wall includes horizontal baffle wall, horizontal baffle wall perpendicular to rivers direction sets up, horizontal baffle wall upstream face array sets up a plurality of buffer blocks, the upstream face of foundation pile sets up baffle wall and water conservancy diversion passageway, can weaken behind the scouring force of rivers to the rivers flow direction, can follow the protection of resisting rivers and direction rivers flow direction two directions realization to the foundation pile, avoid rivers direct action or by the back re-effect at the foundation pile after cutting down.
Description
Technical Field
The invention belongs to the technical field of protection of foundation piles on water, and particularly relates to a pile foundation scour prevention device and method for water engineering.
Background
The pile foundation of water engineering, such as bridges, wharfs and the like, is an important guarantee for engineering stability. However, the scouring action of the water flow on the pile foundation can lead to abrasion and damage of the pile foundation, and even possibly causes engineering safety problems when serious, the wave tides and the continuously moving water flow can directly scour the foundation pile and soil around the foundation pile, and particularly if gaps or loose soil exist around the foundation pile, the scouring action is more obvious. Such flushing may cause the soil surrounding the foundation pile to be carried away, thereby impairing the supporting action of the foundation pile and, in severe cases, even causing the foundation pile to loosen or sink.
Scouring protection measures are needed for pile foundations in order to protect the water buildings. The existing scouring protection method mainly comprises the traditional stone throwing method, foundation expanding protection, guard ring protection, pile body slotting protection, pile front row pile protection, submerged sill protection and the like.
The utility model discloses a pile foundation washs out blocking wall under water of preventing inlet in the area of authorizing bulletin number CN113062345B, including pile under water, the lower half of pile under water buries in the substrate soil, the upper half of pile under water soaks in water, the upper half outside cover of pile under water is equipped with the protection network, fixing device is installed to the bottom of protection network, just fixing device cover is established in the outside of pile under water, the lower half outside cover of pile under water is equipped with solid native device, just solid native device's top is connected with fixing device, solid native device's internally mounted has connecting device.
The plurality of fixing rings are sleeved on the outer side of the foundation mono-pile, the rod arrays of different types are arranged on the fixing rings to form a protection net, and the seawater is guided according to the rods of different types, so that the scouring protection of the foundation mono-pile is realized.
However, the surface area of the fixing ring and the rod is smaller, the impact resistance of the fixing ring and the rod is weaker than that of seawater, and the anti-scouring effect is poorer, so that a device which can be fully contacted with the seawater and can resist the scouring of the seawater on the foundation pile and has small influence of the seawater on soil around the foundation pile is needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a pile foundation scour prevention device and method for water engineering, and solves the problems that foundation piles are scoured by seawater and surrounding soil properties of the foundation piles are affected in the water engineering.
The aim of the invention can be achieved by the following technical scheme:
A pile foundation scour prevention device for water engineering comprises a sand accumulation assembly and a blocking wall; the blocking wall is arranged around the foundation pile, a reinforcing space is formed between the blocking wall and the foundation pile, and the product Sha Zujian is arranged in the reinforcing space;
The blocking wall is provided with a diversion channel, the diversion channel is provided with a water inlet on the water facing surface of the blocking wall and is provided with guide outlets on two sides of the water facing surface, water flow impacting the water facing surface of the blocking wall is led to two sides, the blocking wall comprises a transverse blocking wall, the transverse blocking wall is perpendicular to the water flow direction, a plurality of buffer blocks are arranged on the water facing surface array of the transverse blocking wall and are in fit arrangement, the top surface of any buffer block is an inclined surface, the water inlet is formed in any inclined surface, any water inlet is communicated with the guide outlets, and the buffer blocks can resist water flow scouring; the sand accumulation assembly comprises a sand retention base paved in the reinforced space and a reinforced wall vertically arranged on the sand retention base, and the buffer block is arranged on the reinforced wall; the reinforcement wall is also provided with a sand discharge channel;
The blocking wall further comprises two vertical blocking walls, wherein the two vertical blocking walls are respectively arranged at the end parts of the transverse blocking walls and form a U-shaped structure with the transverse blocking walls; the vertical blocking wall is used for guiding water flow of the transverse blocking wall; the laminating face of a plurality of buffer blocks and reinforcing wall is last still offered the guide sand groove, and a plurality of guide sand grooves form vertical guide sand passageway at horizontal blocking wall, the guide sand passageway passes through the guide sand groove with the sediment outflow passageway intercommunication, just the sediment outflow passageway with reinforcing space intercommunication.
Preferably, the outer edge of the sand retaining base is provided with a protrusion, and the protrusion is used for blocking sediment.
Preferably, the pile foundation scour prevention method for water engineering comprises the following steps:
S1: detecting the water flow velocity/flow rate of the water area where the foundation pile is positioned, and obtaining corresponding data;
s2: calculating the required total diversion volume data according to the data of the water flow speed/flow, thereby obtaining the size data of a single buffer block and the number data of the required buffer blocks;
S3: and distributing the setting positions of the buffer blocks according to the number of the buffer blocks and the area of the water facing surface of the blocking wall. The beneficial effects of the invention are as follows:
the array arrangement of the buffer blocks forms a blocking wall for blocking water flow scouring, so that the scouring effect of water flow on foundation piles is effectively reduced. Meanwhile, the design of the blocking wall and the diversion channel can guide water flow, reduce direct scouring of foundation piles and further improve the effect of the scour prevention device.
The sand guide channel and the sand accumulation assembly form a complete sand flow system together, so that the flow and deposition of sand can be optimized, the effective deposition amount of sand can be increased by reasonably guiding the sand into a sand flowing space, and the scouring and erosion of a river bed can be reduced.
The buffer block parameters and the arrangement mode are set according to river conditions, the calculation of the size and the number of the buffer blocks detected from the water area flow velocity and the water area flow can be systematically completed, and the final buffer block layout scheme is formulated, so that the safety and the stability of foundation pile construction are ensured, and reference experience is provided for similar projects.
Drawings
The present invention is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
FIG. 1 is a schematic elevational view of an anti-scour apparatus according to one embodiment of the present invention;
FIG. 2 is a schematic top view of an anti-scour apparatus according to one embodiment of the present invention;
FIG. 3 is a schematic side cross-sectional view of an anti-scour apparatus provided in one embodiment of the present invention;
FIG. 4 is a schematic diagram of a buffer block according to an embodiment of the present invention;
Legend: 1. a foundation pile; 2. a buffer block; 21. a feed port; 22. an outlet port; 23. a sand guiding groove; 3. product Sha Zujian; 31. reinforcing the wall; 311. a sand discharge channel; 32. a sand retaining base; 321. a protrusion; 4. a diversion channel; 51. a lateral blocking wall; 52. vertical blocking wall.
Detailed Description
In order to further describe the technical means and effects adopted by the invention for achieving the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the invention with reference to the attached drawings and the preferred embodiment.
Because the foundation pile 1 plays a vital role in transportation engineering, because the single pile is fixedly erected on a river bed, the foundation pile 1 needs to bear the scouring of water flow, and the foundation pile 1 directly acts on the foundation pile 1 when the river is scoured, so that the foundation pile 1 is subjected to larger water flow impact force, the stability of the foundation pile 1 is influenced, the abrasion and damage of the foundation pile 1 can be caused by the scouring of the foundation pile 1 by water flow, and even the engineering safety problem can be caused when serious.
As shown in fig. 1-4, a pile foundation scour protection device for water engineering comprises a sand accumulation assembly 3 and a blocking wall; the blocking wall is arranged around the foundation pile 1, a reinforcing space is formed between the blocking wall and the foundation pile 1, the sand accumulation assembly 3 is arranged in the reinforcing space, the sand accumulation assembly 3 is used for stabilizing sand, sand around the foundation pile 1 is prevented from being washed away, the sand around the foundation pile 1 is ensured to flow into the reinforcing space, the foundation pile 1 is stably deposited in the reinforcing space, and meanwhile, the blocking wall can effectively reduce the impact force of water flow on the foundation pile 1, so that the safety and stability of water engineering are improved;
When the water flow acts on the blocking wall, the water flow is subjected to the reaction force of the blocking wall and then turns backwards, and the water flow continuously flows forwards, the forward flowing water flow and the backward water flow act, and the backward flowing water flow finally flows away from the left end and the right end of the blocking wall, according to the phenomenon and the anti-scouring effect of the blocking wall, the blocking wall is provided with the diversion channel 4, the diversion channel 4 is provided with the inlet 21 on the upstream surface of the blocking wall and the two sides of the upstream surface are provided with the guide outlets 22, when the water flow flushes the blocking wall from the upstream to the downstream, the water flow flows into the diversion channel 4 from the inlet 21, and after the water flow acts on the upstream surface of the diversion channel 4, the water flow reversely rotates to the back surface of the diversion channel 4 from the upstream surface of the diversion channel 4, so that when the blocking wall is flushed from the upstream flow down, the water flow which is impacted on the upstream surface of the diversion channel 4 is weakened for the first time, the water flow which is impacted on the upstream surface of the diversion channel 4 is weakened for the second time after the diversion channel 4 is reversely rotated, so that the acting force of the water flow is reduced, the water flow which is impacted on the upstream surface of the blocking wall is led to two sides, the water flow is enabled to reversely rotate to the diversion channel 4 after positively acting on the blocking wall and is discharged to two sides of the foundation pile 1 from the outlet 22 of the diversion channel 4, after the water flow acts on the blocking wall and weakens the acting force of the water flow on the foundation pile 1, the flow direction of the water flow weakened by the blocking wall is guided by the diversion channel 4, the water flow flows away from two sides of the foundation pile 1, the scouring force of the water flow on the foundation pile 1 is weakened, and the flow direction of the water flow is changed, so that the anti-scouring effect on the foundation pile 1 is realized; because foundation pile 1 all receives the scouring force of rivers in the all direction, and the scouring force that foundation pile 1 received is stronger in the rivers direction, the barrier wall includes horizontal barrier wall 51, horizontal barrier wall 51 sets up perpendicularly to rivers direction, horizontal barrier wall 51 is used for blockking the rivers, horizontal barrier wall 51 water facing surface array sets up a plurality of buffer blocks 2, a plurality of buffer blocks 2 arrange into the multirow, the outer terminal surface bottom of going up buffer block 2 and the inner terminal surface top of going down are located same horizontal line between the adjacent going up and down, the arrangement of horizontal barrier wall 51 is compact, the adjacent going up and down buffer block 2 can resist rivers scouring each other, have stronger anti-scouring ability, specific horizontal barrier wall 51's width is greater than the diameter of foundation pile 1 for horizontal barrier wall 51 can play the effect of scour prevention to foundation pile 1 completely.
Most of the water flow acting on the transverse blocking wall 51 is discharged towards the two ends along the outlet 22, and considering the factors such as traffic on water, the width of the transverse blocking wall 51 is not greatly different from the diameter of the foundation pile 1, so if the size difference between the transverse blocking wall 51 and the foundation pile 1 is not great, the water flow acts on the two sides of the foundation pile 1 when being discharged from the two sides of the transverse blocking wall 51, meanwhile, the pressure on the surface of the transverse blocking wall 51 is great because the transverse blocking wall 51 is used as a first anti-flushing wall, the flow velocity of the water flow flowing from the two ends of the transverse blocking wall 51 to the foundation pile 1 is great, the water flow flushing force on the two sides of the foundation pile 1 is also great, the condition that the front end of the foundation pile 1 can be flushed by the water flow, the water flow flushing force on the two sides of the foundation pile 1 also affects the integral structural stability of the foundation pile 1, in one embodiment, the plurality of buffer blocks 2 form vertical blocking walls 52 at the left end and the right end of the foundation pile 1, the guiding opening 22 of the vertical blocking wall 52 is arranged along the water flow direction, namely in the transverse blocking wall 51, the guiding opening 22 is positioned at the left side and the right side, in the vertical blocking wall 52, the guiding opening 22 is positioned at the front side and the rear side, water flows away from the two ends of the transverse blocking wall 51 to act on the vertical blocking wall 52, the vertical blocking wall 52 serves as a second protective wall to play a role in scour prevention for the two sides of the foundation pile 1, meanwhile, the guiding opening 22 is arranged to conform to the water flow direction, when the water flow flows from the two ends of the transverse blocking wall 51 to the vertical blocking wall 52, the guiding opening 22 can guide the water flow direction, when the water flow continues to flow from the transverse blocking wall 51, the water flow is guided to the end of the foundation pile 1 from the guiding opening 22 and is discharged, so that the water flow with larger impact force can be prevented from scouring the vertical blocking wall 52 to the foundation pile 1; meanwhile, besides the guiding function, the buffer block 2 in the vertical blocking wall 52 can also realize the anti-scouring effect on the foundation pile 1 from the side face, specifically, when water flows scour from the side face, the water flows enter the guiding channel 4 from the slope face, when the water flows act reversely, the water flows enter the guiding-out opening 22 at the front side and the rear side, and the guiding-out opening 22 at the front side is impacted by the water flows from the transverse blocking wall 51, and finally the water flows away from the rear end of the guiding-out opening 22, and then the water flows are guided by the vertical blocking wall 52, so that the anti-scouring effect on the side face of the foundation pile 1 is realized.
When the water flow flushes the blocking wall, sediment disturbance around the blocking wall is caused, sediment is driven to flush on the blocking wall, and the sediment flows away from two sides of the blocking wall under the action of the water flow, so that the sediment amount around the blocking wall and the foundation pile 1 is continuously flushed away, the sediment amount at the bottom of the foundation pile 1 is reduced to influence the stability of the foundation pile 1, in order to better guide the sediment, the stability of the foundation pile 1 is further enhanced, in one embodiment, the binding surfaces of the buffer blocks 2 and the wall are also provided with the sediment guide grooves 23, the sediment guide grooves 23 form vertical sediment guide channels in the transverse blocking wall 51, when the water flow flushes in the reverse direction in the inlet 21, the sediment is used in the sediment guide channels because the sediment density is greater than the water density, the sand and water are separated from each other by the prescription of the diversion channel 4 when the water falls under the action of gravity, a small amount of sand can be guided to flow according to a specific path, the sand disturbed by the water flow is redirected to the bottom of the blocking wall, the sand flow is effectively guided and controlled by reasonable sand flow path design, the sand amount directly impacting the foundation pile 1 can be effectively reduced, the sand is guided to the bottom of the blocking wall, the sand flow and deposition are optimized, the effective deposition amount of the sand can be increased by reasonable guiding, the scouring and erosion of a river bed are reduced, the sand flow is managed more efficiently, the scouring of the foundation pile 1 is lightened, and the scouring resistance of the foundation pile 1 is improved.
In order to further enhance the stability of the foundation pile 1 and optimize the effect of sand deposition, in an embodiment, the sand accumulation assembly 3 comprises a sand retention base 32 paved in a reinforced space and a reinforced wall 31 vertically arranged on the sand retention base 32, the reinforced wall 31 and the sand retention base 32 are made of high-strength materials, a plurality of buffer blocks 2 arranged on the reinforced wall 31 can disperse the force of water flow, the foundation pile 1 is further protected from flushing, deposited sand is effectively guided, the effect of sand deposition is optimized, the combination of the reinforced wall 31 and the sand retention base 32 provides strong support, the stability of the foundation pile 1 and a blocking wall is ensured, the reinforced wall 31 can bear the supporting force of a blocking wall and the pressure of the water flow when flushing the buffer blocks 2, and the support is provided for the blocking wall; the design of the sand retaining base 32 helps to guide the stable accumulation of deposited sand on its surface, which not only reduces the scouring of the foundation pile 1 by the water flow, but also secures the surrounding sand from being carried away by the water flow. By combining the reinforcing wall 31 and the sand retaining base 32, the sand around the foundation pile 1 can be prevented from losing, the foundation pile 1 is further protected from scouring and erosion, and the river bed around the foundation pile 1 is effectively stabilized.
In short, by arranging the blocking wall and the diversion channel 4 on the upstream surface of the foundation pile 1, the water flow direction can be guided after the flushing force of the water flow is weakened, the protection of the foundation pile 1 can be realized from the two directions of resisting the flushing of the water flow and guiding the water flow direction, the direct action of the water flow or the reduction of the water flow is avoided, and then the water flow acts on the foundation pile 1, so that the flushing prevention effect of the foundation pile 1 is poor;
Secondly, through setting up long-pending husky subassembly 3 and guide sand passageway, can reduce the silt disturbance around the foundation pile 1 after rivers wash out the retaining wall and guide down get into in the reinforcement space, with the sand around the foundation pile 1 wash away when avoiding rivers to wash out, stabilized the riverbed around the foundation pile 1, improve the stability and the scour resistance ability of foundation pile 1.
In order to better guide water flow and further enhance the anti-scouring capability of the foundation pile 1, in an embodiment, a plurality of buffer blocks 2 are arranged at intervals, a water inlet 21 is arranged on the top surfaces of the buffer blocks 2, the water inlet 21 is communicated with a guide outlet 22, after the water flow enters the guide channel 4 from the water inlet 21, the water flow is guided to two sides of a transverse blocking wall 51 in the guide channel 4, so that the design can ensure that the water flow can be effectively guided and controlled when passing through each buffer block 2, and the stability of the blocking wall is enhanced; meanwhile, the inflow port 21 and the outflow port 22 of the buffer blocks 2 are communicated with each other, so that water flow can more smoothly pass through the whole blocking wall, the impact and vortex formation of the water flow are reduced, the uniform distribution of the water flow is ensured, and the scouring force on the foundation pile 1 is further lightened; in short, the buffer block 2 enhances the overall stability of the blocking wall, so that the blocking wall can better resist the scouring force of water flow, and the communication between the inlet 21 and the outlet 22 is helpful to guide the water flow direction more efficiently, reduce the impact on the foundation pile 1 and reduce the scouring of the river bed.
Because the foundation pile 1 is vertically inserted into a river bed, and when water flows, the foundation pile 1 or a blocking wall is directly and vertically flushed, the existing anti-flushing device is horizontally or vertically arranged with the foundation pile 1, when water flows vertically act on the blocking wall, the water flows directly flow away from two sides of the blocking wall after reversing, the pressure on the surface of the blocking wall is overlarge, the water finally acts on the foundation pile 1 from the surface of the blocking wall, the anti-flushing effect of the foundation pile 1 is poor, the phenomenon of vortex generated by water flow flushing reverse rotation cannot be well adapted, the water flow direction is disordered after weakening the water flow, in one embodiment, a plurality of buffer blocks 2 are attached, the top surface of any buffer block 2 is an inclined surface, an inlet 21 is formed in any inclined surface, any inlet 21 is communicated with the outlet 22, namely the section of the buffer block 2 is of a diamond structure, the upper end surface and the lower end surface are inclined surfaces, the outer end face is lower and has a certain height difference with the inner end face, when the outer end face is lower and water flow acts on the buffer block 2, the water flow directly acts on the inner end face of the buffer block 2 and acts on the outer end face in the direction of the inner end face in a rotating way, so that the impact force of the water flow is weakened and flushed between the opposite sides of the inner end face and the outer end face, the flushing phenomenon of the water flow can be adapted, the water flow direction of the water flow acting on the buffer block 2 is more regular, the flow direction of the water flow can be adapted, the area of the buffer block 2 with a slope structure is larger, the flow rate of the water flow can be born more, the secondary weakening of the water flow flushing can be realized, the buffer block 2 can bear larger impact force of the water flow, wherein the transverse blocking wall 51 is used as a first anti-line for directly resisting the water flow of the foundation pile 1, and the slope structure of the buffer block 2 is added, so that when the water flow flushing is performed on the transverse blocking wall 51, the anti-flushing capability of the foundation pile 1 is enhanced, a stable riverbed environment is also provided for the foundation pile 1.
The motion trend of the water flow at the bottom of the river bed is that the water flow acts on the blocking wall and then acts on the blocking wall in a reverse direction, when the water flow flows in the direction, the water flow acts on the river bed to enable the water flow to move upwards, according to the motion trend of the water flow, the water flow can drive sand to move at the same time, when the sand guiding channel guides sand to the bottom of the foundation pile 1, the sand guiding channel can be dispersed by the water flow, and the sand cannot be deposited at the bottom of the foundation pile 1 when the sand moves upwards, so that the sand loss at the bottom of the foundation pile 1 is serious, in one embodiment, the outer edge of the sand retaining base 32 is provided with the protrusion 321, the protrusion 321 is used for blocking the sand of the sand guiding channel, when the sand guided by the sand guiding channel flows to the sand discharging channel 311, the water flow drives the sand to reversely move backwards, the sand acts on the protrusion 321 and changes the motion direction, the sand is changed from the backward motion direction to the motion direction of the reinforcing wall 31, and finally the sand can be deposited under the action of gravity, so that the sand can be effectively prevented from losing and the sand can be effectively deposited.
The reinforced wall 31 blocks the flow of sand and soil, so that the sand and soil is deposited on the sand retaining base 32 instead of on the periphery of the foundation pile 1, the sand and soil are effectively deposited in the foundation pile 1 and play a role in stabilizing the foundation pile 1, in one embodiment, a vertical sand guide channel is further formed on the transverse blocking wall 51, the sand discharge channel 311 is communicated with the reinforced space, the sand discharge channel 311 is positioned at the bottom of the reinforced wall 31 and is used for guiding the sand of the sand guide channel into the reinforced space through the sand discharge channel 311, and by arranging the sand discharge channel 311 at the bottom of the reinforced wall 31, the flow of the sand and soil can be effectively guided, the sand and soil can be guided from the sand retaining base 32 to the foundation pile 1 and deposited in the reinforced space, the sand discharge channel 311 is designed to enable the sand and soil to smoothly flow away, and the erosion to the foundation pile 1 is reduced; the sediment discharge channel 311 is higher than the bulge 321, so that sediment just enters the reinforcing space from the sediment discharge channel 311 when the sediment and the bulge 321 are changed into the direction of flowing to the reinforcing wall 31, and the sediment is deposited in the reinforcing space under the action of gravity, so that the reinforcing of the river bed around the foundation pile 1 is realized, and the stability of the foundation pile 1 is improved.
Because the river flow speed is faster, the buffer blocks 2 are arranged around the foundation pile 1 to reduce the direct impact of water flow on the foundation pile 1, and measures are necessary to ensure the stability and the safety of the foundation pile 1, in one embodiment, the pile foundation scour prevention method for water engineering comprises the following steps:
S1: detecting the water flow speed/flow rate of the water area where the foundation pile 1 is located, obtaining corresponding data, performing real-time monitoring on the water flow speed at a plurality of points around the foundation pile 1 by using a flow rate meter (such as a Doppler flow rate meter), selecting a proper position at the upstream and downstream of the river, setting a temporary water level observation station, calculating the flow rate through water level change, continuously monitoring for one week to obtain average flow speed and flow data under the influence of different weather and tides, performing real-time monitoring on the water flow speed at a plurality of points around the foundation pile 1 by using a flow rate meter (such as a Doppler flow rate meter), selecting a proper position at the upstream and downstream of the river, setting a temporary water level observation station, calculating the flow rate through water level change, and continuously monitoring for one week to obtain average flow speed and flow data under the influence of different weather and tides.
S2: according to the data of the flow speed/flow, calculating the required total diversion volume data, thereby obtaining the size data of the single buffer block 2 and the number data of the required buffer blocks 2, and implementing details: according to the average flow velocity and flow data collected in S1, the distribution condition of the water flow around the foundation pile 1 is analyzed by using a fluid dynamic model (such as CFD simulation), the total amount of the water flow required to be guided is determined so as to ensure that the water flow around the foundation pile 1 is stable and no vortex is formed, the size of the required single buffer block 2 is calculated according to the total flow guiding amount data and the preset efficiency (usually obtained by experiments or experience) of the buffer block 2, and the number of the required buffer blocks 2 is determined according to the size of the single buffer block 2 and the arrangeable space around the foundation pile 1.
S3: according to the number of the buffer blocks 2 and the setting positions of the buffer blocks 2 distributed on the area of the upstream surface of the blocking wall, implementation details are as follows: and (3) according to the number of the buffer blocks 2 and the area of the upstream surface of the blocking wall obtained in the step (S2), a layout scheme of the buffer blocks 2 is formulated. The specific coordinates and the elevation of each buffer block 2 are determined by comprehensively considering the water flow direction, the flow velocity distribution and the structural characteristics of the foundation pile 1. And compiling detailed construction drawings and installation guidelines, including manufacturing materials, fixing modes, safety measures and the like of the buffer block 2.
In summary, in the embodiment, the calculation of the size and the number of the buffer blocks 2 from the detection of the flow velocity and the flow of the water area can be systematically completed, and then the layout scheme of the final buffer blocks 2 is formulated, so that the safety and the stability of the foundation pile 1 construction are ensured, and the borrowable experience is provided for similar projects.
Although the present invention has been described in terms of the preferred embodiments, it should be understood that the present invention is not limited to the specific embodiments, but is capable of numerous modifications and equivalents, and alternative embodiments and modifications of the embodiments described above, without departing from the spirit and scope of the present invention.
Claims (3)
1. The pile foundation scour prevention device for the water engineering is characterized by comprising a sand accumulation assembly and a blocking wall; the blocking wall is arranged around the foundation pile, a reinforcing space is formed between the blocking wall and the foundation pile, and the product Sha Zujian is arranged in the reinforcing space;
The blocking wall is provided with a diversion channel, the diversion channel is provided with a water inlet on the water facing surface of the blocking wall and is provided with guide outlets on two sides of the water facing surface, water flow impacting the water facing surface of the blocking wall is led to two sides, the blocking wall comprises a transverse blocking wall, the transverse blocking wall is perpendicular to the water flow direction, a plurality of buffer blocks are arranged on the water facing surface array of the transverse blocking wall and are in fit arrangement, the top surface of any buffer block is an inclined surface, the water inlet is formed in any inclined surface, any water inlet is communicated with the guide outlets, and the buffer blocks can resist water flow scouring; the sand accumulation assembly comprises a sand retention base paved in the reinforced space and a reinforced wall vertically arranged on the sand retention base, and the buffer block is arranged on the reinforced wall; the bottom of the reinforced wall is provided with a sand discharge channel;
The blocking wall further comprises two vertical blocking walls, wherein the two vertical blocking walls are respectively arranged at the end parts of the transverse blocking walls and form a U-shaped structure with the transverse blocking walls; the vertical blocking wall is used for guiding water flow of the transverse blocking wall; the laminating face of a plurality of buffer blocks and reinforcing wall is last still offered the guide sand groove, and a plurality of guide sand grooves form vertical guide sand passageway at horizontal blocking wall, the guide sand passageway passes through the guide sand groove with the sediment outflow passageway intercommunication, just the sediment outflow passageway with reinforcing space intercommunication.
2. The pile foundation anti-scouring device for water engineering according to claim 1, wherein the outer edge of the sand retaining base is provided with a protrusion for blocking sediment.
3. A pile foundation anti-scour method for water engineering, applicable to the pile foundation anti-scour device for water engineering according to any one of claims 1-2, characterized in that: the method comprises the following steps:
S1: detecting the water flow velocity/flow rate of the water area where the foundation pile is positioned, and obtaining corresponding data;
s2: calculating the required total diversion volume data according to the data of the water flow speed/flow, thereby obtaining the size data of a single buffer block and the number data of the required buffer blocks;
S3: and distributing the setting positions of the buffer blocks according to the number of the buffer blocks and the area of the water facing surface of the blocking wall.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101678143B1 (en) * | 2016-06-27 | 2016-11-21 | (주)에스엔비 | Block for wave energy diminution and construction method of block for wave energy diminution |
| CN113089714A (en) * | 2021-04-13 | 2021-07-09 | 南京工程学院 | Offshore wind power single-pile foundation anti-scouring device and construction method thereof |
| CN114606986A (en) * | 2022-03-28 | 2022-06-10 | 中山大学 | Scour prevention device based on accumulated silt is promoted to rivers self-consuming energy |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101678143B1 (en) * | 2016-06-27 | 2016-11-21 | (주)에스엔비 | Block for wave energy diminution and construction method of block for wave energy diminution |
| CN113089714A (en) * | 2021-04-13 | 2021-07-09 | 南京工程学院 | Offshore wind power single-pile foundation anti-scouring device and construction method thereof |
| CN114606986A (en) * | 2022-03-28 | 2022-06-10 | 中山大学 | Scour prevention device based on accumulated silt is promoted to rivers self-consuming energy |
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