A layout structure combining debris-blocking fixed piers with a dredging wharf
By combining the dredging wharf with the debris barrier fixed piers, filling the joints with asphalt-impregnated fir planks, and installing mortar anchors and drainage holes, the problem of the large footprint of the debris barrier fixed piers and dredging wharf was solved, achieving a compact layout, saving investment and accelerating the project progress.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- POWERCHINA HUADONG ENG CORP LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-26
AI Technical Summary
In water conservancy and hydropower projects, the fixed piers for intercepting debris and the dredging wharves are two independent structures that occupy a large area and are difficult to arrange compactly within the cofferdam pit, affecting construction conditions and project progress.
By combining the dredging wharf with the debris-blocking fixed piers, and by filling the structural joints with asphalt-impregnated fir planks, and setting mortar anchors, horizontal reinforcing bars and drainage holes on the foundation, combined with the concrete structure, the footprint is reduced.
This approach achieves a compact layout of the debris-blocking fixed piers and dredging wharf within the cofferdam foundation pit, saving on project investment, reducing construction interference, and improving construction efficiency.
Smart Images
Figure CN224281133U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of water conservancy and hydropower technology, specifically to an arrangement structure of a fixed pier for intercepting debris and a dredging wharf. Background Technology
[0002] In water conservancy and hydropower projects, to prevent debris from clogging the intake and turbines of hydropower stations, causing unstable generator operation or even shutdown, a debris barrier is typically installed a certain distance in front of the intake to intercept floating debris in the water. Accumulated debris in front of the debris barrier is periodically removed manually. To ensure the stability of the debris barrier, concrete anchors are installed at both ends, with vertical chutes on the anchors to allow the barrier to rise or fall with the water level. Manual cleaning of debris requires the assistance of dredging vessels, which in turn require corresponding dredging docks for mooring and transferring debris. The debris barrier anchors and dredging docks are two independent structures, generally arranged separately. However, for projects with a compact layout and a small excavation area within the cofferdam, it is difficult to provide sufficient space for the debris barrier and anchors. Summary of the Invention
[0003] This application provides an arrangement structure for a fixed pier for intercepting debris and a dredging wharf. The overall arrangement structure is more compact, which can reduce the footprint and facilitates the placement of both the fixed pier for intercepting debris and the dredging wharf within the cofferdam pit area.
[0004] The arrangement structure of the debris-blocking fixed pier combined with the dredging wharf provided in this application includes: debris-blocking fixed pier, which is located on the side of the river channel close to the dam access road;
[0005] The dredging wharf is located upstream of and adjacent to the debris-blocking fixed pier. A structural joint is provided between the dredging wharf and the debris-blocking fixed pier, and the structural joint is filled with asphalt-impregnated fir planks of a predetermined thickness. The dredging wharf has a predetermined length along the extension direction of the dam access road, and multiple mooring bollards are provided at intervals along the length direction of the dredging wharf.
[0006] In addition, the arrangement structure of the debris-blocking fixed piers combined with the dredging wharf provided in this application may also have the following additional technical features:
[0007] In one alternative, the dredging wharf is provided with multiple sets of steps at intervals along its length leading to the mooring bollards, and the downstream side of the dredging wharf is provided with steps leading to the top of the debris barrier fixing pier, wherein the debris barrier fixing pier and / or the dredging wharf are concrete structures.
[0008] In one alternative, the bottom foundation of the debris-blocking fixed pier and the dredging wharf is weakly weathered bedrock. After excavation, the upper surface of the weakly weathered bedrock is stepped, and the bottom of the debris-blocking fixed pier and the dredging wharf are respectively provided with multiple mortar anchors extending into the weakly weathered bedrock.
[0009] In one alternative embodiment, the dam access road is provided with multiple horizontal reinforcing bars at intervals on the side facing the river channel, and the multiple horizontal reinforcing bars extend into the debris-blocking fixed pier and the dredging wharf respectively; the debris-blocking fixed pier and the dredging wharf are respectively provided with multiple drainage holes extending into the bottom foundation of the dam access road, the drainage holes have a rock penetration length of 5m and an upward angle of 10°, and the multiple drainage holes are arranged in a quincunx pattern with a 2m interval.
[0010] In one alternative embodiment, the debris-blocking fixed pier is equipped with a debris-blocking slide rail on the side closest to the river channel. The top of the debris-blocking slide rail is at the same elevation as the top of the debris-blocking fixed pier, and the bottom of the debris-blocking slide rail is lower than the lowest water level during the operation of the hydropower station.
[0011] The beneficial effects of this application are as follows:
[0012] The layout structure in this application places the dredging wharf adjacent to the fixed pier for intercepting debris, and the structural joint between the dredging wharf and the fixed pier for intercepting debris is made of asphalt-impregnated fir wood planks. This combined layout structure can effectively reduce the land area occupied and is conducive to arranging the fixed pier for intercepting debris and the dredging wharf within the cofferdam pit area. It has certain advantages in creating dry construction conditions, saving project investment, reducing construction interference and speeding up project progress.
[0013] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description
[0014] Figure 1 A schematic diagram of the arrangement structure provided in this application in a specific embodiment;
[0015] Figure 2 for Figure 1 A cross-sectional view of the layout structure at point AA;
[0016] Figure 3 for Figure 1 A cross-sectional view of the layout structure at BB;
[0017] Figure 4 A cross-sectional schematic diagram of a specific embodiment of the debris-blocking fixed pier provided in this application.
[0018] Attached reference numerals: 1. Pollution barrier fixed pier, 2. Dam access road, 3. Dredging wharf, 31. Mooring bollard, 32. Step, 4. Mortar anchor bolt, 5. Horizontal reinforcing bar, 6. Drainage hole, 7. Pollution barrier slide rail, 8. PVC drainage pipe, 9. Reinforcing bar of pollution barrier fixed pier.
[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation
[0020] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0021] It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other technical solutions obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0022] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.
[0023] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0024] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.
[0025] like Figure 1-4As shown in the figure, this application embodiment provides an arrangement structure of a debris-blocking fixed pier combined with a dredging wharf. This arrangement structure mainly includes a debris-blocking fixed pier 1 and a dredging wharf 3. The debris-blocking fixed pier 1 is located on the side of the river channel near the upstream road 2, with its top elevation smoothly connected to the road surface of the upstream road 2. Its top platform can also serve as a docking platform for dredging vehicles. The dredging wharf 3 is located upstream of and adjacent to the debris-blocking fixed pier 1, meaning the dredging wharf 3 and the debris-blocking fixed pier 1 are arranged together along the river direction. The debris-blocking fixed pier 1 is located downstream of the dredging wharf 3, and its top platform also serves as a docking platform for dredging vehicles at the dredging wharf 3. Furthermore, a structural joint is provided between the dredging wharf 3 and the debris-blocking fixed pier 1, and the joint is filled with asphalt-impregnated fir planks of a predetermined thickness. The dredging wharf 3 has a predetermined length along the extension direction of the upstream road 2, and multiple mooring bollards 31 are spaced apart along its length to secure dredging vessels.
[0026] In this embodiment, the dredging wharf 3 is arranged adjacent to the debris barrier fixed pier 1, and the structural joint between the dredging wharf 3 and the debris barrier fixed pier 1 is provided with asphalt fir wood planks. This combined arrangement can effectively reduce the land area occupied and facilitates the arrangement of the debris barrier fixed pier 1 and the dredging wharf 3 within the cofferdam foundation pit. It has certain advantages in creating dry construction conditions, saving project investment, reducing construction interference, and accelerating project progress.
[0027] like Figure 1 As shown, in one specific embodiment, the dredging wharf 3 is provided with multiple sets of steps 32 at intervals along its length, each leading to a mooring bollard 31. Specifically, the steps 32 are set upstream along the river to gradually lower their top elevation. Between the dead water level and the normal storage water level, a dredging wharf 3 can be set every 1.5m. The downstream side of the dredging wharf 3 is provided with steps 32 leading to the top of the debris barrier fixed pier 1. The debris barrier fixed pier 1 and / or the dredging wharf 3 are concrete structures.
[0028] like Figure 2-3 As shown, in one specific embodiment, the bottom foundation of the debris-blocking fixed pier 1 and the dredging wharf 3 is weakly weathered bedrock. After the weakly weathered bedrock is excavated, the upper surface of the bedrock is stepped. The bottom of the debris-blocking fixed pier 1 and the dredging wharf 3 are respectively provided with a plurality of mortar anchor rods 4 extending into the weakly weathered bedrock.
[0029] like Figure 2-3As shown, in one specific embodiment, the outer side of the roadbed of the dam access road 2 adopts a counterweight retaining wall, and the side of the dam access road 2 facing the river is roughened and multiple horizontal reinforcing bars 5 are spaced out. These horizontal reinforcing bars 5 extend into the debris-blocking fixed pier 1 and the dredging wharf 3, respectively. Generally, the length of the horizontal reinforcing bars 5 is 2m, and the length exposed and inserted into the debris-blocking fixed pier 1 and the dredging wharf 3 is 1m, used to strengthen the connection with the debris-blocking fixed pier 1 and the dredging wharf 3. Multiple drainage holes 6 extending into the bottom foundation of the dam access road 2 are respectively provided in the debris-blocking fixed pier 1 and the dredging wharf 3. The length of the drainage holes 6 into the rock is 5m, the upward angle is 10°, and the multiple drainage holes 6 are arranged in a quincunx pattern with a 2m interval. In addition, the drainage structure within the dam access road 2, such as the drainage gallery, is also equipped with PVC drainage pipes 8 that pass through the debris-blocking fixed pier 1 and the dredging wharf 3, respectively.
[0030] like Figure 1 and Figure 4 As shown, in one specific embodiment, the debris-blocking fixed pier 1 is equipped with a debris-blocking slide rail 7 on the side closest to the river channel. The top of the debris-blocking slide rail 7 is level with the top of the debris-blocking fixed pier 1, and the bottom of the debris-blocking slide rail 7 is lower than the lowest water level during the operation of the hydropower station. Debris-blocking fixed pier reinforcement bars 9 are provided on the side of the debris-blocking fixed pier 1 closest to the riverbank and at the connection points of the debris-blocking slide rail 7.
[0031] The arrangement structure of the debris-blocking fixed piers combined with the dredging wharf in the various embodiments of this application can be constructed according to the following steps:
[0032] 1) According to the geological survey data, the foundations of the debris-blocking fixed pier 1 and the dredging wharf 3 shall be excavated to the bedrock surface as required by the design. During the construction period, the slope seepage situation should be closely monitored. If the seepage is large, drainage measures should be taken in time. After the excavation is completed, the mortar anchor rod 4 shall be supported in time. The mortar anchor rod 4 shall be exposed and bent in accordance with the design requirements.
[0033] 2) Roughen the concrete surface of the retaining wall of the upper dam road 2 and arrange 2m long horizontal reinforcing bars 5. The horizontal reinforcing bars 5 are exposed for 1m and arranged in a quincunx pattern with 2m intervals to strengthen the connection with the fixed pier 1 for debris flow and the dredging wharf 3.
[0034] 3) Erect formwork and pour concrete for the fixed pier 1 and dredging wharf 3. Embed metal parts at the location of the sluice gate and reserve space for the second phase of concrete. Set up a structural joint between the fixed pier 1 and the dredging wharf 3 and fill it with 2cm thick asphalt fir wood boards.
[0035] 4) Install mooring bollards 31 on the riverside part of the dredging platform of the dredging wharf 3 to fix the dredging vessel; install and weld the embedded parts of the debris barrier slide rail 7, and pour the second phase of concrete.
[0036] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A layout structure combining fixed piers for debris interception with a dredging wharf, characterized in that, include: Pollution-blocking fixed piers are located on the side of the river channel near the dam access road; The dredging wharf is located upstream of and adjacent to the debris-blocking fixed pier. A structural joint is provided between the dredging wharf and the debris-blocking fixed pier, and the structural joint is filled with asphalt-impregnated fir planks of a predetermined thickness. The dredging wharf has a predetermined length along the extension direction of the dam access road, and multiple mooring bollards are provided at intervals along the length direction of the dredging wharf.
2. The arrangement structure of the fixed piers for intercepting debris and the dredging wharf according to claim 1, characterized in that, The dredging wharf is provided with multiple sets of steps at intervals along its length, each leading to one of the mooring bollards. The downstream side of the dredging wharf is provided with steps leading to the top of the debris-blocking fixed pier. The debris-blocking fixed pier and / or the dredging wharf are concrete structures.
3. The arrangement structure of the fixed piers for intercepting debris and the dredging wharf according to claim 1 or 2, characterized in that, The bottom foundations of the debris-blocking fixed pier and the dredging wharf are weakly weathered bedrock. After excavation, the upper surface of the weakly weathered bedrock is stepped. The bottom of the debris-blocking fixed pier and the dredging wharf are respectively provided with multiple mortar anchors extending into the weakly weathered bedrock.
4. The arrangement structure of the fixed piers for intercepting debris and the dredging wharf according to claim 3, characterized in that, The dam access road has multiple horizontal reinforcing bars spaced apart on the side facing the river, and these horizontal reinforcing bars extend into the debris-blocking fixed pier and the dredging wharf, respectively. The debris-blocking fixed pier and the dredging wharf are each provided with multiple drainage holes extending into the foundation of the dam access road. The drainage holes have a rock penetration length of 5m and an upward angle of 10°. The drainage holes are arranged in a quincunx pattern with a 2m interval.
5. The arrangement structure of the debris-blocking fixed pier combined with the dredging wharf according to claim 1, 2, or 4, characterized in that, The debris-blocking fixed pier is equipped with a debris-blocking slide rail on the side closest to the river channel. The top of the debris-blocking slide rail is at the same elevation as the top of the debris-blocking fixed pier, and the bottom of the debris-blocking slide rail is lower than the lowest water level during the operation of the hydropower station.