Integrated retaining wall inverted filtration drainage structure
By setting up an integrated reverse filtration and drainage structure on the back of the retaining wall, and adopting permeable material block stacking and inclined design, the problems of cumbersome and unstable construction are solved, and efficient construction and stability of the retaining wall are achieved.
Patent Information
- Application Number
- CN202422074238.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The construction process of the existing retaining wall reverse filtration and drainage structure is cumbersome and the construction period is long, which increases the risk of slope instability, and the structure of the reverse filtration layer is not stable enough and has poor integrity.
The integrated retaining wall reverse filtration and drainage structure is adopted, including a first water barrier layer, a permeable filler layer and a reverse filtration and drainage member on the back of the retaining wall. The reverse filtration and drainage member is formed by a stack of permeable material blocks and covered with a permeable filler layer on the outside. The second water barrier layer is arranged above, and the permeable material block is covered with geotextile, and the inclination angle is optimized to improve stability.
Simplify the construction process, reduce construction period, improve the compressive strength and water permeability stability of the retaining wall filter layer, enhance integrity and stability, and reduce construction weight and land use scale.
Smart Images
Figure CN223119041U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of road subgrade engineering, in particular to an integrated retaining wall filter drainage structure. Background Technique
[0002] At present, there are mainly three schemes for the filter drainage layer on the back of the retaining wall. The first is when the backfill of the retaining wall is cohesive soil or water is not easy to penetrate into the drain holes and is discharged out of the wall surface. A continuous drainage layer is filled with permeable materials (such as gravel or crushed stone, etc.) between the backfill and the back of the wall from the top surface of the wall to the lowest drain hole, and the top and bottom need to be made of clay as a water barrier layer. The second is when the backfill of the retaining wall is permeable soil. To prevent blockage, a gravel filter layer is set at the water inlet end of the drain hole, and a water barrier layer is set at the lower end of the lowest row of drain holes to prevent water from seeping in. The third is when the water volume on the back of the wall is large, a longitudinal drainage ditch can be added at the bottom of the drainage layer to cooperate with the drainage layer to drain the water out of the wall. If there are sections with springs, seepage water, etc., longitudinal and transverse blind ditches should be set to lead the water out. When the water volume on the back of the wall is large, a longitudinal drainage ditch should be added at the bottom of the drainage layer. The above three schemes all involve the setting of the filter drainage structure. When constructing the filter drainage structure, it is first necessary to separate each layer by a thin partition board, fill in layers from bottom to top, and gradually extract the partition board. The construction process is relatively cumbersome, the construction period is long, and the risk of slope instability of the slope with construction projects at the top of the slope is increased. Content of the Utility Model
[0003] The purpose of the utility model is to provide an integrated retaining wall filter drainage structure to improve the integrity and stability of the filter layer on the back of the retaining wall. To achieve the above purpose, the utility model adopts the following technical solutions:
[0004] The utility model discloses an integrated retaining wall filter drainage structure. A drain hole is arranged in the wall body of the retaining wall. The integrated retaining wall filter drainage structure includes: a first water barrier layer, a permeable filler layer, a filter drainage member, and a second water barrier layer arranged on one side of the back of the retaining wall.
[0005] The permeable filler layer and the filter drainage member are arranged above the first water barrier layer.
[0006] The filter drainage member is formed by stacking permeable material blocks in sequence. The inner side of the filter drainage member is closely attached to the back of the retaining wall and covers the outside of the drain hole. The permeable filler layer is arranged on the outside of the filter drainage member.
[0007] The second water barrier layer is arranged above the permeable filler layer and the filter drainage member.
[0008] Furthermore, the permeable material block is wrapped with geotextile.
[0009] Preferably, the permeable material block is a permeable concrete brick or a foamed concrete block.
[0010] Furthermore, the permeable material block includes: a bottom member, a middle member, and a top member. A plurality of the middle members are provided and installed between the bottom member and the top member.
[0011] Wherein, a first protrusion is provided on the upper surface of the bottom member, a first groove is provided on the lower surface of the top member, second protrusions or second grooves are respectively provided on the upper surface and the lower surface of the middle member, and the bottom member, the middle member, and the top member are stacked through the fitting of the protrusions and the grooves.
[0012] Preferably, the first water barrier layer and the second water barrier layer are clay layers.
[0013] Furthermore, the filter drainage member forms an inclined angle B with the vertical plane, the wall back of the retaining wall forms an inclined angle A with the vertical plane, and the inclined angle A and the inclined angle B ≤ 15°.
[0014] Wherein, the inclined angle A and the inclined angle B are equal.
[0015] Preferably, the inclination of the drain hole is 2-6%.
[0016] Furthermore, the outer sides of the first water barrier layer, the permeable filler layer, and the second water barrier layer are inclined, and the inclined angle C with the horizontal plane is 60-80°.
[0017] After adopting the above technical solutions, the present utility model has the following effects:
[0018] 1. The main body of the present utility model is a small filter drainage member made of permeable materials, which can increase the compressive strength and permeable stability of the structure through the integrity of the filter drainage structure, and at the same time improve the integrity and stability of the filter layer structure on the wall back of the retaining wall.
[0019] 2. The filter drainage member of the present utility model selects permeable materials, which can reduce the weight of the filter drainage member. Especially when using foamed concrete blocks, it is lighter in weight, greatly reducing the weight of the overall drainage member and facilitating the construction of the filter structure of the retaining wall.
[0020] 3. The present utility model can optimize the construction process of the filter structure of the retaining wall, reduce the construction time of the filter structure, reduce the construction period of the retaining wall, and at the same time increase the excavation slope rate of the retaining wall, thereby reducing the land use scale. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a sectional view of the structural layout of the present utility model.
[0022] Figure 2 This is a three-dimensional structure diagram of the filter drainage structure of the present utility model.
[0023] Figure 3 This is a three-dimensional structure diagram of the bottom member of the filter drainage structure of the present utility model.
[0024] Figure 4 This is a three-dimensional structure diagram of the top member of the filter drainage structure of the present utility model.
[0025] Figure 5 This is a three-dimensional structure diagram of the middle member of the filter drainage structure of the present utility model.
[0026] Figure 6 This is a schematic diagram of a geotextile wrapped around a permeable material block of the present utility model (taking the bottom member as an example).
[0027] Main component symbols:
[0028] 1: Retaining wall, 2: Wall back, 3: First water barrier layer, 4: Permeable filler layer, 5: Filter drainage member, 51: Bottom member, 511: First protrusion, 52: Top member, 521: First groove, 53: Middle member, 531: Second protrusion, 532: Second groove, 54: Geotextile, 6: Second water barrier layer, 7: Drainage hole. Specific embodiments
[0029] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the accompanying drawings and embodiments.
[0030] As Figure 1 shown, the present utility model discloses an integrated retaining wall filter drainage structure. A drainage hole 7 is provided in the wall body of the retaining wall 1. The integrated retaining wall filter drainage structure includes: a first water barrier layer 3, a permeable filler layer 4, a filter drainage member 5 and a second water barrier layer 6 provided on one side of the wall back 2 of the retaining wall 1.
[0031] The permeable filler layer 4 and the filter drainage member 5 are provided above the first water barrier layer 3.
[0032] The filter drainage member 5 is formed by stacking permeable material blocks in sequence. The inner side of the filter drainage member 5 is closely attached to the wall back 2 of the retaining wall 1 and covers the outside of the drainage hole 7. The permeable filler layer 4 is provided on the outside of the filter drainage member 5.
[0033] As Figure 6 shown, in this embodiment, the permeable material block is wrapped with a geotextile 54, and the permeable material block is a foam concrete block. In other embodiments, the permeable material block is a permeable concrete brick.
[0034] The second water barrier layer 6 is arranged above the pervious filler layer 4 and the filter drainage member 5.
[0035] In this embodiment, the first water barrier layer 3 and the second water barrier layer 6 are clay layers. Moreover, in this embodiment, the outer sides of the first water barrier layer 6, the pervious filler layer 4 and the second water barrier layer 6 are inclined, and the inclination angle C with the horizontal plane is 71.5°. In other embodiments, the inclination angle C is 60 - 80°.
[0036] Secondly, in this embodiment, the filter drainage member 5 forms an inclination angle B with the vertical plane, and the wall back 2 of the retaining wall 1 forms an inclination angle A with the vertical plane. Among them, the inclination angle A and the inclination angle B are equal, both being 5.7°. In other embodiments, the inclination angle A and the inclination angle B ≤ 15°.
[0037] In addition, in this embodiment, the inclination of the drain hole 7 is 2 - 6%, and the lower part of the drain hole 7 is tamped with clay and leveled.
[0038] As Figure 2 shown, the pervious material block includes: a bottom member 51, a middle member 53 and a top member 52. A plurality of middle members 53 are provided and installed between the bottom member 51 and the top member 52.
[0039] Among them, as Figures 3 to 5 shown, the upper surface of the bottom member 51 is provided with a first protrusion 511, the lower surface of the top member 52 is provided with a first groove 521, the upper surface and the lower surface of the middle member 53 are respectively provided with a second protrusion 531 or a second groove 532, and the bottom member 51, the middle member 53 and the top member 52 are stacked through the engagement of the protrusions and grooves.
[0040] During construction, first, lay the geogrid tightly against the wall back 2 of the retaining wall 1 at the preset position of the filter drainage member. Then, stack the filter drainage members 5 in sequence and place them tightly against the wall back 2 of the retaining wall 1 to wrap the geogrid. Finally, backfill the pervious filler layer 4.
[0041] The above is only a preferred specific embodiment of the present utility model. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.
Claims
1. Integrated filter drainage structure for retaining wall, there is a drain hole (7) arranged inside the wall body of the retaining wall (1), characterized in that, Comprising: A first water barrier layer (3), a pervious filler layer (4), a filter drainage member (5) and a second water barrier layer (6) arranged on one side of the wall back (2) of the retaining wall (1); The pervious filler layer (4) and the filter drainage member (5) are arranged above the first water barrier layer (3); The filter drainage member (5) is formed by stacking pervious material blocks in sequence, and the inner side of the filter drainage member (5) is closely attached to the wall back (2) of the retaining wall (1) and covers the outside of the drainage hole (7), and the pervious filler layer (4) is arranged on the outer side of the filter drainage member (5); The second water barrier layer (6) is arranged above the pervious filler layer (4) and the filter drainage member (5).
2. The integrated retaining wall filter drainage structure according to claim 1, characterized in that: The pervious material block is wrapped with geotextile (54).
3. The integrated retaining wall filter drainage structure according to claim 1 or 2, characterized in that: The pervious material block is a pervious concrete brick or a foam concrete block.
4. The integrated retaining wall filter drainage structure according to claim 1, characterized in that: The pervious material block includes: a bottom member (51), a middle member (53) and a top member (52), and a plurality of the middle members (53) are provided and installed between the bottom member (51) and the top member (52).
5. The integrated retaining wall filter drainage structure according to claim 4, characterized in that: The upper surface of the bottom member (51) is provided with a first protrusion (511), the lower surface of the top member (52) is provided with a first groove (521), the upper surface and the lower surface of the middle member (53) are respectively provided with a second protrusion (531) or a second groove (532), and the bottom member (51), the middle member (53) and the top member (52) are stacked by the engagement of the protrusions and grooves.
6. The integrated retaining wall filter drainage structure according to claim 1, characterized in that: The first water barrier layer (3) and the second water barrier layer (6) are clay layers.
7. The integrated retaining wall filter drainage structure according to claim 1, characterized in that: The filter drainage member (5) forms an inclined angle B with the vertical plane, the wall back (2) of the retaining wall (1) forms an inclined angle A with the vertical plane, and the inclined angle A and the inclined angle B ≤ 15°.
8. The integrated retaining wall filter drainage structure according to claim 7, characterized in that: The inclined angle A and the inclined angle B are equal.
9. The integrated retaining wall filter drainage structure according to claim 1, characterized in that: The inclination of the drainage hole (7) is 2-6%.
10. The integrated retaining wall filter drainage structure according to claim 1, characterized in that: The outer sides of the first water barrier layer (3), the pervious filler layer (4) and the second water barrier layer (6) are inclined, and the inclined angle C with the horizontal plane is 60-80°.