CN210482362U - Assembled rigid and flexible combined elastic anti-seismic reinforced earth retaining wall - Google Patents
Assembled rigid and flexible combined elastic anti-seismic reinforced earth retaining wall Download PDFInfo
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- CN210482362U CN210482362U CN201920761814.5U CN201920761814U CN210482362U CN 210482362 U CN210482362 U CN 210482362U CN 201920761814 U CN201920761814 U CN 201920761814U CN 210482362 U CN210482362 U CN 210482362U
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Abstract
The utility model belongs to the field of slope protection and earthquake resistance, and aims to solve the problems of poor deformation adaptability of the rigid joint of the panel of the existing reinforced retaining wall, large occupied area of the flexible panel-free reinforced soil slope and the like, the utility model provides an assembled rigid and flexible combined elastic earthquake-resistant reinforced retaining wall construction method, which greatly enhances the deformation adaptability of the retaining wall and reduces the engineering occupied area by using geogrids, assembled wall panels and elastic damping devices; the scouring damage to the slope surface is reduced; under the action of earthquake load, the connecting steel plate of the elastic damping connecting device is used as a splicing mould, so that certain dislocation between wall surface panel building blocks is allowed to be avoided, and the damage to the joint of the wall surface panel and the geogrid is reduced; the upper and lower geogrids are separately arranged to be more reasonable in stress, so that the structure is more stable, and the deformation fatigue life is long.
Description
Technical Field
The utility model belongs to side slope protection and antidetonation disaster reduction field, concretely relates to use rigidity, the combined geogrid of spring shock attenuation connecting device to add the construction method of muscle barricade, be a geotechnical engineering with middle-size and small-size geosynthetic material combination adds muscle retaining structure.
Background
The reinforced retaining wall is widely applied to the stable reinforcement of hillsides, foundation pit side slopes and river quay walls due to the excellent bearing capacity and the excellent anti-seismic stability of the reinforced retaining wall. Through the demonstration of engineering practical experience at home and abroad for many years, the reinforced retaining wall can effectively reinforce or block bad geological bodies when encountering earthquake disasters. For example, to reinforce landslides, collapses, rock masses, to block rockfall, debris flow, and the like.
However, according to the post-earthquake investigation of reinforced retaining walls worldwide in recent years, although reinforced retaining walls exhibit superior earthquake resistance compared to conventional gravity retaining walls, a greater proportion of reinforced retaining walls are damaged to different degrees. One of the main failure phenomena is the fracture of the rigid connection between the retaining wall panel and the rib material, because the flexible reinforcing body has better deformation adaptability, and the rigid connection at the rigid panel has poorer deformation adaptability, so the retaining wall panel is easy to fail due to the difference of the deformation adaptability.
The existing better solution is to adopt an ecological flexible panel-free geogrid reinforced soil side slope, and the method has the advantages that: the construction can be operated by machinery, and is quick, simple and convenient; the original side slope soil body is fully utilized, the abandoned side is reduced, and the ecological environment is protected; meanwhile, the side slope can be beautifully greening, and the landscape effect is good; the construction cost is low; but also has the disadvantages that the occupied area is wider, and the needed earth and stone volume is relatively large; the slope surface is easy to be washed and damaged under the action of rainfall. Thus, land utilization and material costs of the project are increased, durability is relatively poor, and it is not suitable for projects having a small available area. And further provides a construction method of an assembled rigid-flexible combined elastic anti-seismic reinforced retaining wall on the basis of the construction method of the ecological flexible panel-free geogrid reinforced soil side slope.
Disclosure of Invention
The utility model discloses a solve the problem of the big scheduling phenomenon of reinforced soil side slope area that current reinforced retaining wall panel rigid connection department warp adaptability poor, flexible no panel, and then provide an assembled just, gentle combined elasticity antidetonation reinforced soil retaining wall and construction method.
The utility model adopts the following technical scheme:
the utility model provides an assembled just, gentle combined elasticity antidetonation reinforced earth barricade, includes assembled shingle nail concrete block, waterproof geomembrane, concrete waterproof seal top layer, geogrid device, basis and filling ground, and geogrid device docks and the construction is installed on the basis with filling ground top surface parallel and level, the geogrid device is formed by connecting the grid monomer that a plurality of layers of level set up, and the grid monomer is parallel to each other, and the free head and tail end parallel and level of each layer grid, and the space between the grid monomer is closely knit by the backfill soil, and assembled shingle nail concrete block passes through elasticity shock attenuation connecting device concatenation and is connected perpendicularly with the geogrid device, constitutes just, gentle combined elasticity antidetonation reinforced earth barricade.
And 1 elastic damping connecting device is arranged at the splicing position of each assembled wall panel concrete building block along the cross section of the retaining wall.
The elastic shock absorption connecting device comprises a shock absorption spring, an embedded connecting plate and a fixing rod, the elastic shock absorption connecting device is connected with the assembled wall panel concrete building block through the embedded connecting plate at the front end of the shock absorption spring, and the elastic shock absorption connecting device is connected with the geogrid device through the fixing rod at the rear end of the shock absorption spring.
The upper side and the lower side of the assembled wallboard concrete blocks are provided with preformed grooves for seamless splicing of the assembled wallboard concrete blocks from top to bottom.
The embedded connecting plate is also a splicing mould of the assembled wall panel concrete building blocks, the embedded connecting plate is embedded into the upper and lower assembled wall panel concrete building block preformed grooves and embedded and sealed by using the bar planting glue, so that the upper and lower assembled wall panel concrete building blocks are seamlessly and closely spliced.
Before the geogrid device is reversely wrapped, the elastic damping connecting device fixing rod penetrates through meshes of the laid main ribs and auxiliary rib grids, so that the geogrid device is connected with the elastic damping connecting device.
A construction method of an assembled rigid-flexible combined elastic anti-seismic reinforced earth retaining wall adopts a spring shock absorption connecting device to improve the deformation adaptability of the retaining wall, and the concrete construction steps of the assembled rigid-flexible combined elastic anti-seismic reinforced earth retaining wall are as follows:
1) constructing a foundation: adopting a cast-in-place concrete foundation or a grouted barren rock foundation;
2) constructing and filling a foundation: excavating the combination part of the undisturbed slope body into a step shape to form a filling foundation with an inverted trapezoidal step section so as to increase interface friction;
3) grouting the base of the bottom assembled wall foundation on the concrete foundation or the grouted barred rock foundation;
4) embedding an embedded connecting plate of the elastic shock absorption connecting device into the assembled wall panel concrete block, paving filler behind the assembled wall panel concrete block, paving a geogrid device, paving a main rib grid and an auxiliary rib grid, and penetrating a fixing rod through meshes of the paved main rib and auxiliary rib grid before turning up to connect the geogrid device with the elastic shock absorption connecting device;
5) constructing the geogrid device: and sequentially laying the grid monomers layer by layer from bottom to top on the basis of the completion of construction, and performing construction of the previous layer of grid monomers after filling, compacting and leveling the grid monomers of each layer of construction.
The utility model provides an arrangement and a method of an assembled rigid-flexible combined reinforced earth retaining wall for geotechnical engineering, which uses a geogrid device (5), an assembled wall panel concrete block (1) and an elastic damping connecting device (2) to reinforce soil, which greatly enhances the deformation adaptability of the earth retaining wall and reduces the engineering occupation area by using the geogrid device (5), the assembled wall panel concrete block (1) and the elastic damping connecting device (2); under the action of earthquake load, the embedded connecting plates (63) of the elastic shock absorption connecting devices (2) are used as splicing molds, certain dislocation between the assembled wall panel concrete blocks (1) is allowed to be avoided, meanwhile, the fixed rods (61) of the elastic shock absorption connecting devices (2) are used for replacing the rigid connection commonly used nowadays between the wall surface and the geogrid device (5), the deformation coordination capability of the wall surface and the geogrid device (5) is enhanced, and therefore the brittle failure of the joint of the assembled wall panel concrete blocks (1) and the geogrid is reduced; the geogrid is connected through the U-shaped nails and the nylon cable ties (53), so that the structure becomes a unified stressed whole and is safer, and the nylon cable ties (53) are made of geosynthetic materials, can resist potential corrosion and aging risks of traditional steel wire binding, and improve the corrosion resistance and durability of the system; by arranging the inner and outer water discharging facilities, the structure can still have enough durability under the action of natural environment factors such as rainfall and the like. In order to research the stress and deformation conditions of the reinforced retaining wall under the action of earthquake load and verify the safety of the reinforced retaining wall, a finite element model of the reinforced retaining wall is established as shown in figure 6, the response of the reinforced retaining wall under the action of the load on the upper part of the reinforced retaining wall is simulated by vertically and uniformly distributed load, the dynamic response of the reinforced retaining wall under the action of the earthquake load is simulated by EL earthquake waves, and dynamic analysis is carried out. Considering the stress and deformation conditions of the reinforced retaining wall under the combined action of dynamic load and static load, considering that the deformation is small and the deformation condition cannot be seen clearly, a deformation grid graph 8 with a large coefficient of 50 times is taken and placed, and a total displacement graph 9 is synthesized, so that the maximum displacement is known to occur at the top of the wall and has a trend of decreasing from top to bottom, and the deformation to the position of the wall foundation is negligible. Without significant deformation of the wall surface portion. The elastic damping connecting device only bears axial force, so that the elastic damping connecting device longitudinally generates small displacement along with the soil body and has no obvious influence on the working performance of the elastic damping connecting device. Compared with the traditional reinforced side slope, the displacement of the wall surface is small, the deformation conditions such as wall surface uplift and the like do not exist, and the protection capability is strong. It can be seen from fig. 10 that the horizontal displacement caused by the seismic load is small, the maximum displacement occurs in the non-reinforced area, and the stability of the wall body is not obviously affected because the front non-reinforced area is protected by the panel. As can be seen from the deformed contour plot of fig. 11, the wall has no significant potential slip surface sliding outward.
Therefore, the method and the structure of the utility model are simple, the strength, the rigidity, the deformation adaptability and the stability are good, the deformation fatigue life is good, and the anti-scouring capability is strong. In addition, in the practical engineering application, carry out the vertical settlement that can further reduce the wall body to the backfill body, firm basic building in addition enables this novel reinforced retaining wall to have superior stability in the engineering.
Drawings
FIG. 1 is a schematic structural view of a reinforced retaining wall;
fig. 2 is a schematic view of the construction of a geogrid arrangement;
FIG. 3 is a schematic view of the construction of the assembled wall panel concrete block;
FIG. 4 is a schematic view of an elastomeric shock absorbing interface;
FIGS. 5a and 5b are detailed dimension diagrams of the elastic damping connecting device;
FIG. 6 is a schematic view of a finite element model of a reinforced retaining wall;
fig. 7 is a graph of the numerical calculated average stress of the practice of the present invention;
FIG. 8 is a grid diagram illustrating the numerical calculation distortion implemented by the present invention;
FIG. 9 is a graph of the total displacement of numerical calculations performed by the present invention;
FIG. 10 is a graph of numerical calculated horizontal displacement implemented by the present invention;
fig. 11 is a numerical calculation total displacement contour map implemented by the present invention.
In the figure: 1-assembled wall panel concrete blocks, 2-elastic damping connecting devices, 3-waterproof geomembrane, 4-concrete waterproof sealing top layers, 5-geogrid devices, 6-foundation, 7-infiltration ditch, 8-drain pipe, 9-backfilled broken stone, 10-filled foundation and 11-protective layer;
51-grid monomer, 52-backfill, 53-nylon cable tie, 54-auxiliary tie bar, 55-main tie bar and 56-fill bag;
61-fixed rod, 62-damping spring, 63-embedded connecting plate.
Detailed Description
The utility model discloses an adopt elasticity shock attenuation connecting device to connect assembled shingle nail and geogrid, make reinforced earth barricade both have sufficient flexibility, difficult emergence is difficult to prosthetic rigidity destruction under the effect of earthquake load, has increased the ability that shingle nail adaptation soil body warp, uses the prefabricated building block panel of concatenation formula to make the construction more simple and convenient simultaneously. The introduction of the waterproof geomembrane ensures that the reinforced soil body is not easy to be invaded by water, and the broken line reverse wrapping technology of the geogrid is adopted to greatly reduce the deformation of the slope.
The utility model discloses a combined reinforced earth barricade of assembled rigid and flexible as shown in fig. 1, 2, including assembled wall panel concrete block 1, elasticity shock attenuation connecting device 2, geogrid device 5, basis 6 and filled foundation 10, assembled wall panel concrete block 1 is perpendicular with geogrid device 5, and geogrid device 5 docks and the construction is installed on basis 6 with the 10 top surfaces parallel and level of filled foundation, its characterized in that: geogrid device 5 is formed by connecting the grid monomer 51 that a plurality of layers of levels set up, and grid monomer 51 is parallel to each other, and the head and the tail end parallel and level of each layer grid monomer 51, and assembled wallboard concrete block 1 passes through elasticity shock attenuation connecting device 2 and is connected with geogrid, constitutes just, the combined elasticity antidetonation reinforced earth retaining wall of gentle combination, and the space between grid monomer 51 is closely knit by backfill soil 52.
Elastic shock attenuation connecting device 2 includes damping spring 62, embedded connecting plate 63, dead lever 61, and the embedded connecting plate 63 of damping spring 62 front end both is elastic shock attenuation connecting device 2 and assembled wallboard concrete block 1's connecting device, is assembled wallboard concrete block 1's concatenation mould again, and assembled wallboard concrete block 1 preformed groove about embedding embedded connecting plate 63 embedding to use the planting bar to glue the embedment, make 1 seamless inseparable concatenations of assembled wallboard concrete block from top to bottom. The fixing rod 61 at the rear end penetrates through the meshes of the grating and is arranged in the grating to play a role in connection and fixation. Set up 1 elasticity shock attenuation connecting device 2 along 1 concatenation departments of every assembled wallboard concrete block of retaining wall cross section. As shown in fig. 4.
Taking a certain project as an example, it is right that the concrete construction method of the assembled rigid and flexible combined elastic anti-seismic reinforced earth retaining wall is further explained:
1) cast-in-place concrete foundation or mortar stone foundation is adopted.
2) And (4) leveling the ground, and leveling and filling the foundation according to the design drawing and the on-site soil property condition. The stable of main consideration reinforced earth structure when selecting the section form, the peripheral topography condition, the utility model discloses choose for use down trapezoidal section, with original state slope body combination position excavation step form to increase interfacial friction, clear away earlier before the construction and add barrier and weeds of muscle within range, combine the ground to handle to bad foundation soil and carry out the strong affair replacement, the design elevation should be dug to the bottom, and the flattening.
3) And accurately paying off according to construction drawings and related design requirements.
4) And (3) grouting the bottom assembled wall panel concrete blocks 1 on a concrete foundation.
5) Cutting the geogrid according to the design requirement, and laying a bottom layer grid according to the actual position of construction paying-off. Along the longitudinal direction of the field, adjacent geogrids are butted, and the geogrids must be laid according to the position length and the direction required by the design drawing.
6) Embedding the embedded connecting plates 63 of the elastic shock absorption connecting devices 2 into the assembled wall panel concrete blocks 1, paving filler outside the assembled wall panel concrete blocks 1 at a certain distance, paving geogrids, paving auxiliary bar grids and main bar grids, penetrating the fixing rods 61 through the meshes of the paved main bars and auxiliary bar grids before turning over, connecting the geogrid devices 5 with the elastic shock absorption connecting devices 2, placing the soil filling bags 56 at reserved turning-over section grids, using the soil filling bags 56 as a turning-over section front-end curve forming die, turning over the geogrids by clinging the soil filling bags 56, and paving and filling a certain amount of backfill. The tail part of the reverse wrapping section above the main lacing bar 55 is turned downwards and fixed in a mode of forming an angle of 45 degrees with the horizontal direction, and then the reverse wrapping section of the auxiliary lacing bar 54 is bound with the main lacing bar 55 to finish the manufacturing of the reinforcement layer of the grid single body 51;
the main lacing wires in the step 5) adopt EGA100100 glass fiber self-adhesive type materials, and the auxiliary lacing wires adopt GSJ150150 warp-knitted polyester materials.
And 6) arranging 1 elastic damping connecting device 2 at the splicing position of each assembled wallboard concrete block 1 along the cross section of the retaining wall.
Claims (5)
1. The assembled rigid-flexible combined elastic anti-seismic reinforced earth retaining wall is characterized by comprising assembled wall panel concrete blocks (1), waterproof geomembranes (3), concrete waterproof sealing top layers (4), geogrid devices (5), a foundation (6) and a filling foundation (10), wherein the geogrid devices (5) are butted with the top surface of the filling foundation (10) in a flush manner and are installed on the foundation (6) in a construction manner, the geogrid devices (5) are formed by connecting a plurality of layers of horizontally arranged grid monomers (51), the grid monomers (51) are parallel to each other, the head end and the tail end of each layer of grid monomer (51) are flush, gaps among the grid monomers (51) are compacted by backfill soil (52), and the assembled rigid-flexible combined elastic anti-seismic reinforced earth retaining wall is characterized in that the assembled wall panel concrete blocks (1) are spliced by elastic shock absorption connecting devices (2) and are vertically connected with the geogrid devices (5), to form a rigid and flexible combined elastic anti-seismic reinforced earth retaining wall.
2. The assembled rigid-flexible combined type elastic anti-seismic reinforced retaining wall according to claim 1, wherein 1 elastic shock-absorbing connector (2) is provided along the cross section of the retaining wall at the joint of each assembled wall panel concrete block (1).
3. The assembled rigid-flexible combined type elastic anti-seismic reinforced earth retaining wall according to claim 1, wherein the elastic shock-absorbing connection device (2) comprises a shock-absorbing spring (62), an embedded connection plate (63) and fixing rods (61), the embedded connection plate (63) at the front end of the shock-absorbing spring (62) connects the elastic shock-absorbing connection device (2) with the assembled wall panel concrete block (1), and the fixing rods (61) at the rear end of the shock-absorbing spring (62) connect the elastic shock-absorbing connection device (2) with the geogrid device (5).
4. The assembled rigid-flexible combined elastic anti-seismic reinforced earth retaining wall according to claim 3, wherein the assembled wall panel concrete blocks (1) are provided with pre-grooves at the upper and lower sides for seamless splicing of the assembled wall panel concrete blocks (1) at the upper and lower sides.
5. The assembled rigid-flexible combined elastic anti-seismic reinforced earth retaining wall according to claim 4, wherein the embedded connection plates (63) are also splicing molds of the assembled wallboard concrete blocks (1), the embedded connection plates (63) are embedded into the preformed grooves of the upper and lower assembled wallboard concrete blocks (1), and the embedded connection plates are embedded and sealed by using the bar-planting glue, so that the upper and lower assembled wallboard concrete blocks (1) are seamlessly and tightly spliced.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110016933A (en) * | 2019-05-24 | 2019-07-16 | 郑州大学 | A kind of construction method of rigid, the soft combined elastic anti-seismic reinforced earth bulkhead of assembled |
| CN111945775A (en) * | 2020-08-18 | 2020-11-17 | 中南大学 | Assembled expansive soil slope ecological shock attenuation reinforced earth double sided board unit and native barricade |
| CN113982004A (en) * | 2021-12-24 | 2022-01-28 | 太原理工大学 | Anchor cable-reinforced soil combined soil retaining member and construction method thereof |
-
2019
- 2019-05-24 CN CN201920761814.5U patent/CN210482362U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110016933A (en) * | 2019-05-24 | 2019-07-16 | 郑州大学 | A kind of construction method of rigid, the soft combined elastic anti-seismic reinforced earth bulkhead of assembled |
| CN111945775A (en) * | 2020-08-18 | 2020-11-17 | 中南大学 | Assembled expansive soil slope ecological shock attenuation reinforced earth double sided board unit and native barricade |
| CN111945775B (en) * | 2020-08-18 | 2021-08-17 | 中南大学 | Assembled expansive soil slope ecological shock attenuation reinforced earth double sided board unit and native barricade |
| CN113982004A (en) * | 2021-12-24 | 2022-01-28 | 太原理工大学 | Anchor cable-reinforced soil combined soil retaining member and construction method thereof |
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