Anchorage active drainage system
By installing an active drainage system with seepage ditches, collection wells, and drainage tunnels under the anchorages of suspension bridges, the problem of poor drainage of anchorages in complex mountainous terrain has been solved, resulting in a reduction of the groundwater level, an improvement in the durability of the anchorages, and a reduction in maintenance costs.
Patent Information
- Application Number
- CN202520066825.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-13
AI Technical Summary
In complex mountainous terrain, the lack of drainage design in suspension bridge anchorages leads to the accumulation of groundwater, affecting the anchorage's structural safety and durability, and also results in complicated and costly maintenance.
Design an active drainage system for anchorages, including a seepage ditch, a collection well, and a drainage hole. The seepage ditch collects seepage water from the bottom of the anchorage, and the collection well directs the water to the drainage hole to remove groundwater, forming an effective seepage drainage path.
It effectively lowers the groundwater level, reduces the impact of buoyancy, reduces the design volume of anchor concrete, lowers maintenance costs, and improves anchor durability.
Smart Images
Figure CN223893221U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge engineering technology, and in particular to an active drainage system for anchorages. Background Technology
[0002] Suspension bridges have advantages such as large span capacity, aesthetically pleasing design, and clearly defined stress distribution, making them a preferred choice for selecting long-span bridges. A suspension bridge typically consists of main components such as bridge towers, anchorages, main cables, suspenders, and main beams. Among these, the anchorages are the anchorage bodies for the main cables, and their primary function is to transfer the tension of the main cables to the foundation; their load-bearing capacity and reliability are crucial.
[0003] Most suspension bridges use gravity anchorages, which generally consist of an anchor body and a foundation. The anchorage relies on its own weight to counteract the vertical component of the main cable's force, while the horizontal component is counteracted by the frictional resistance between the ground and the anchorage foundation. The key design considerations for the anchorage lie in its anti-sliding stability coefficient and anti-overturning stability coefficient under the tension of the main cable.
[0004] However, in actual engineering projects, complex mountainous terrains, such as mountain canyons, are characterized by steep terrain, large variations in rock strata, well-developed joints and fissures, and abundant fissure water. Traditional anchorage designs suffer from the following problems:
[0005] Due to the abundance of fissure water in mountainous areas, conventional mountain anchorages lack drainage design. After the anchorage pit excavation and trench backfilling, rainwater infiltration and poor drainage lead to groundwater accumulation, creating a water basin effect. This exerts upward buoyancy on the anchorage, severely impacting its structural safety. Furthermore, the lack of drainage design in most existing suspension bridge anchorages results in year-round water accumulation, significantly affecting their durability. Therefore, pumping water from the anchorage chamber is often necessary. While pumping is convenient to implement, subsequent maintenance is cumbersome, timely maintenance is difficult to guarantee, and the overall life-cycle cost is high.
[0006] Therefore, it is necessary to propose an active drainage system for anchorages to solve or at least mitigate the aforementioned defects. Utility Model Content
[0007] The main objective of this invention is to provide an active drainage system for anchorages, thereby solving the technical problem of complicated anchorage maintenance caused by the lack of drainage design considerations in existing technologies.
[0008] To achieve the above objectives, this utility model provides an active drainage system for anchorages, including a seepage ditch, a collection well, and a drainage hole located below the anchorage; wherein, the seepage ditch is located below the anchorage and is used to collect seepage water from the bottom of the anchorage; the collection well is connected to the seepage ditch and is used to guide water from the seepage ditch to the drainage hole; the drainage hole is located below the collection well and is connected to the collection well, and is used to discharge water from the collection well.
[0009] Preferably, the seepage ditch includes a ditch body extending in the transverse direction, a coarse gravel layer disposed in the ditch body, and a permeable pipe extending in the extension direction of the ditch body. The permeable pipe is pre-embedded in the coarse gravel layer. The ditch body has two outlets arranged opposite to each other in its own extension direction. The outlets are connected to corresponding collection wells. The ditch body has a drainage slope from the middle of the ditch body toward the outlets.
[0010] Preferably, it also includes a drainage ditch located around the anchorage, the drainage ditch being connected to the seepage ditch, the drainage ditch having a drainage slope toward the seepage ditch, and the drainage ditch being used to collect surface water from the slope.
[0011] Preferably, the slope also includes a water interception ditch and a drainage ditch located at the top of the slope. The water interception ditch is used to intercept surface water from the top of the slope, and the drainage ditch is connected to the water interception ditch and is used to drain the water from the water interception ditch.
[0012] Preferably, the top of the drainage hole is provided with a flow hole that connects to the water collection well, and the water from the water collection well enters the drainage hole through the flow hole.
[0013] Preferably, the inner bottom surface of the trench is covered with impermeable geotextile.
[0014] Preferably, the cross-section of the water collection well is square.
[0015] Preferably, the cross-section of the drainage hole is any one of rectangular, circular, or horseshoe shape.
[0016] Preferably, the sidewall slope ratio of the ditch is set to 3:1.
[0017] Preferably, the permeable pipe is a 300mm PVC permeable pipe.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] This utility model provides an active drainage system for anchorages, including a seepage ditch, a collection well, and a drainage hole located below the anchorage. The seepage ditch is located below the anchorage and is used to collect seepage water from the bottom of the anchorage. The collection well is connected to the seepage ditch and is used to guide water from the seepage ditch to the drainage hole. The drainage hole is located below the collection well and is connected to the collection well and is used to discharge water from the collection well.
[0020] This application places a seepage ditch below the anchorage to collect seepage water from the bottom area of the anchorage. The seepage water collected in the ditch flows into a collection well along its extension direction. The water in the collection well is then discharged through a drainage hole. Through the coordinated work of the seepage ditch, collection well, and drainage hole, an effective seepage drainage path is formed. This application innovatively combines a drainage system with the anchorage. The permanent drainage system adopted in this application can not only effectively lower the groundwater level and reduce the buoyancy of groundwater on the anchorage, thereby reducing the design volume of the anchorage concrete, but also greatly reduce the later maintenance costs and improve the durability of the anchorage, resulting in significant economic benefits. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0022] Figure 1 This is a schematic elevation view of the overall structure in one embodiment of the present utility model, depicting an application scenario.
[0023] Figure 2 This is a plan view of the overall structure in one embodiment of the present invention, illustrating an application scenario.
[0024] Figure 3 This is a frontal view of the overall structure in one embodiment of the present utility model;
[0025] Figure 4 This is a side view of the seepage ditch and water collection well in one embodiment of the present invention;
[0026] Figure 5 This is a cross-sectional schematic diagram of the seepage ditch in one embodiment of the present invention;
[0027] Figure 6 This is a cross-sectional schematic diagram of a water collection well in one embodiment of the present invention.
[0028] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.
[0029] Explanation of icon numbers:
[0030] 10. Anchorage; 20. Seepage ditch; 210. Ditch body; 220. Coarse gravel layer; 230. Permeable pipe; 240. Impermeable geotextile; 30. Sump well; 40. Drainage hole; 410. Flow hole; 50. Drainage ditch; 60. Intercepting ditch; 70. Drainage ditch. Detailed Implementation
[0031] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0034] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0035] Please see the appendix Figures 1 to 6 An active drainage system for an anchorage, provided in one embodiment of the present invention, includes a seepage ditch 20, a collection well 30, and a drainage hole 40 disposed below the anchorage 10. The seepage ditch 20 is disposed below the anchorage 10 and is used to collect seepage water from the bottom of the anchorage 10. The collection well 30 is connected to the seepage ditch 20 and is used to drain water from the seepage ditch 20 to the drainage hole 40. The drainage hole 40 is disposed below and connected to the collection well 30 and is used to drain water from the collection well 30.
[0036] Specifically, complex mountainous terrain encountered in actual engineering projects, such as mountain canyons, is characterized by steep terrain, large variations in rock strata, well-developed joints and fissures, and abundant fissure water. Due to the abundance of fissure water, this application sets up a seepage ditch 20 below the anchor 10 to collect seepage water from the bottom area of the anchor 10. The seepage water collected by the seepage ditch 20 flows into the collection well 30 along the extension direction of the seepage ditch 20. The water in the collection well 30 is discharged through the drainage hole 40. Through the coordinated work of the seepage ditch 20, the collection well 30, and the drainage hole 40, an effective seepage and drainage path is formed.
[0037] This application innovatively combines a drainage system with the anchor 10. The permanent drainage system adopted in this application can not only effectively lower the groundwater level and reduce the buoyancy of groundwater on the anchor 10, thereby reducing the concrete design volume of the anchor 10, but also greatly reduce the later maintenance cost and improve the durability of the anchor 10, with significant economic benefits.
[0038] In a preferred embodiment, the seepage ditch 20 includes a ditch body 210 extending in the transverse direction, a coarse gravel layer 220 disposed in the ditch body 210, and a permeable pipe 230 extending in the extension direction of the ditch body 210. The permeable pipe 230 is pre-embedded in the coarse gravel layer 220. The ditch body 210 has two outlets (not shown) arranged opposite to each other in its own extension direction. The outlets are connected to the corresponding collection wells 30. The ditch body 210 has a drainage slope from the middle of the ditch body 210 toward the outlets.
[0039] Specifically, the seepage ditch 20, through its design of a ditch body 210 extending along the transverse direction of the bridge, can effectively collect seepage water from the bottom of the anchorage 10 along this direction. The coarse gravel layer 220 provides good filtration and permeability, allowing water to flow smoothly through and to the permeable pipe 230, which is pre-embedded within the coarse gravel layer 220, further enhancing drainage efficiency. The ditch body 210 has a drainage slope from the middle towards the outlet, allowing water within the ditch body 210 to flow to the outlet and be discharged more quickly.
[0040] As a preferred embodiment, it also includes a drainage ditch 50 located around the anchor 10, the drainage ditch 50 being connected to the seepage ditch 20, the drainage ditch 50 having a drainage slope toward the seepage ditch 20, and the drainage ditch 50 being used to collect surface water from the slope.
[0041] Specifically, such as Figure 1-2As shown, the arrows indicate the direction of water flow. The drainage ditch 50 is located around the anchor 10 to collect surface water from the slope, such as rainwater, snowmelt, and other surface runoff that may flow into the anchor 10 area. The drainage ditch 50 helps to reduce the scouring and erosion of the anchor 10 and the surrounding soil, thereby protecting the stability of the anchor 10 foundation. The drainage ditch 50 is connected to the seepage ditch 20, and the water collected in the drainage ditch 50 is eventually discharged through the drainage hole 40.
[0042] As another preferred embodiment, it also includes a water interception ditch 60 and a drainage ditch 70 located at the top of the slope. The water interception ditch 60 is used to intercept surface water from the top of the slope, and the drainage ditch 70 is connected to the water interception ditch 60 and is used to drain the water from the water interception ditch 60.
[0043] Specifically, intercepting ditch 60 is located at the top of the slope, and its main function is to intercept surface water from the top of the slope. By effectively intercepting surface water, the scouring and erosion effects of water flow on the slope are reduced, thereby protecting the stability of the slope. Drainage ditch 70 is connected to intercepting ditch 60, and the surface water intercepted by intercepting ditch 60 is guided into drainage ditch 70 and flows along drainage ditch 70 to the designated discharge area.
[0044] Furthermore, the top of the drainage hole 40 is provided with a flow hole 410 that connects to the water collection well 30, and the water from the water collection well 30 enters the drainage hole 40 through the flow hole 410.
[0045] Specifically, the overflow hole 410 in this embodiment allows water in the collection well 30 to be discharged directly through the drainage hole 40 without having to go through other complex drainage paths, reducing the risk of poor drainage or blockage caused by complex paths.
[0046] Furthermore, the inner bottom surface of the trench 210 is covered with an impermeable geotextile 240. The impermeable geotextile 240 has excellent impermeability and can effectively prevent water from seeping into the inner bottom surface of the trench 210.
[0047] As a specific example, the cross-section of the water collection well 30 is square. In other embodiments, those skilled in the art can also set the cross-sectional shape of the water collection well 30 to other shapes according to actual needs.
[0048] Furthermore, the cross-section of the drainage hole 40 can be rectangular, circular, or horseshoe-shaped. Those skilled in the art can make a flexible choice according to actual needs.
[0049] As a specific example, the sidewall slope ratio of the trench 210 is set to 3:1.
[0050] As a preferred example, the permeable pipe 230 is a 300mm PVC permeable pipe 230.
[0051] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. An active drainage system for anchorages, characterized in that, It includes a seepage ditch, a collection well, and a drainage hole located below the anchorage; wherein, the seepage ditch is located below the anchorage and is used to collect seepage water from the bottom of the anchorage; the collection well is connected to the seepage ditch and is used to drain water from the seepage ditch to the drainage hole; the drainage hole is located below the collection well and is connected to the collection well and is used to drain water from the collection well.
2. The active drainage system for anchorages according to claim 1, characterized in that, The seepage ditch includes a ditch body extending in the transverse direction, a coarse gravel layer disposed in the ditch body, and a permeable pipe extending in the extension direction of the ditch body. The permeable pipe is pre-embedded in the coarse gravel layer. The ditch body has two outlets arranged opposite each other in its own extension direction. The outlets are connected to corresponding collection wells. The ditch body has a drainage slope from the middle of the ditch body toward the outlets.
3. The active drainage system for anchorages according to claim 2, characterized in that, It also includes a drainage ditch located around the anchorage, the drainage ditch being connected to the seepage ditch, the drainage ditch having a drainage slope toward the seepage ditch, and the drainage ditch being used to collect surface water from the slope.
4. The active drainage system for anchorages according to claim 2, characterized in that, It also includes intercepting ditch and drainage ditch located at the top of the slope. The intercepting ditch is used to intercept surface water from the top of the slope, and the drainage ditch is connected to the intercepting ditch and is used to drain the water from the intercepting ditch.
5. The active drainage system for anchorages according to claim 2, characterized in that, The top of the drainage hole is provided with a flow hole that connects to the water collection well, and the water from the water collection well enters the drainage hole through the flow hole.
6. The active drainage system for anchorages according to claim 2, characterized in that, The inner bottom surface of the trench is covered with impermeable geotextile.
7. The active drainage system for anchorages according to claim 1, characterized in that, The cross-section of the water collection well is square.
8. The active drainage system for anchorages according to claim 1, characterized in that, The cross-section of the drainage hole can be any one of rectangular, circular, or horseshoe shape.
9. The active drainage system for anchorages according to claim 2, characterized in that, The slope ratio of the sidewalls of the ditch is set to 3:
1.
10. The active drainage system for anchorages according to claim 2, characterized in that, The permeable pipe is a 300mm PVC permeable pipe.