CN209603115U - A kind of loess high roadbed cheuch ground discharge structure - Google Patents
A kind of loess high roadbed cheuch ground discharge structure Download PDFInfo
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- CN209603115U CN209603115U CN201920154772.9U CN201920154772U CN209603115U CN 209603115 U CN209603115 U CN 209603115U CN 201920154772 U CN201920154772 U CN 201920154772U CN 209603115 U CN209603115 U CN 209603115U
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Abstract
The utility model discloses a kind of loess high roadbed cheuch ground discharge structures, including the main french drain that tap drain extending direction is laid on former loess foundation along original land in gully and the secondary french drain that Zhigou extending direction is laid on former loess foundation and is connected to main french drain along original land in gully, secondary french drain and the basal surface elevation at main french drain communicating position are equal with the basal surface elevation of main french drain at the position, secondary french drain and main french drain include the outer layer geotextile protective layer being successively laid with from outside to inside, interlayer particulate rubble filter protection layer, internal layer geotechnical fibre filter layer and kernel coarse grain drainage blanket, the cross sectional area of kernel coarse grain drainage blanket in secondary french drain is less than the cross sectional area of the kernel coarse grain drainage blanket in main french drain, the cross section of secondary french drain and the cross section of main french drain are full rubble section.The utility model stabilized structure, porosity are big, draining is unobstructed, silting blocking performance is strong, can effectively solve the original gully karness base drainage problem of existing loess high roadbed engineering.
Description
Technical field
The utility model belongs to loess high roadbed cheuch ground technical field of drainage, and in particular to a kind of loess high roadbed ditch
Valley floor base discharge structure.
Background technique
As economy rapid development in China's is quickly propelled with urbanization process, that construction land all occur in many areas is tight
Open this situation.Under the premise of moderate solution, the embankments engineering such as " cut mountain and fill out ditch ", " control ditch and make ground " becomes China's land resources
One of the important decision and developing direction of development and utilization and deposit protection.The area will be changed after loess high roadbed engineering filling construction
The free drainage condition in domain, if earlier drainage system setting is unreasonable, the engineering later period easily causes level of ground water to rise, and jeopardizes
Filling body stability.Especially " the water-sensitive characteristic " of loess so that entire loess high roadbed engineering to the variation of water environment extremely
Sensitivity, not at that time, water level, which rises, easily to be caused slope instability, makes the sedimentation of ground large area etc. now for original gully karness base draining setting
As to influence the quality safety and practicability of engineering.
There are two types of types for the essential structure of conventional weeper drain: one is the blind drainage structure that full rubble fills, this
It is class structural form stable structure, solid, it is not easy to collapse, but setting was not easy to happen silting, failure at that time；Another kind is rubble packet
The structure type for wrapping up in major diameter culvert pipe forms hollow weeper drain, although the short-term internal drainage of the structure is unobstructed, culvert pipe is mixed
Solidifying soil and steel reinforcement cage easily corrode, get rusty, and upper cover may be under round culvert pipe, especially culvert pipe under high roadbed load action
Semi-circular portions cause to cleave, collapse, destroy, and shorten french drain service life, collapse so that top be made to make ground formation.
Utility model content
The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide a kind of loess
High roadbed cheuch ground discharge structure, it is novel in design reasonable, it is outer by being arranged on the outside of interlayer particulate rubble filter protection layer
Layer geotextile protective layer has stress buffer, compatibility of deformation, coarse granule filtering triple role, by interlayer particulate rubble
Internal layer geotechnical fibre filter layer is set on the inside of filter protection layer, and fine grained reverse filter effect guarantees that water quality is limpid, guarantees kernel coarse grain
Drainage blanket by silting, not can effectively solve the original gully karness base drainage problem of existing loess high roadbed engineering, avoid the engineering later period
Water level rising causes the excessive slaking deformation of engineering and sedimentation, the construction quality and safety of loess high roadbed engineering is effectively ensured, just
In popularization and use.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of loess high roadbed cheuch ground
Discharge structure, it is characterised in that: blind including tap drain extending direction is laid on former loess foundation along original land in gully master
Ditch and the secondary french drain that Zhigou extending direction is laid on former loess foundation and is connected to main french drain along original land in gully, it is secondary blind
Ditch and the basal surface elevation at main french drain communicating position are equal with the basal surface elevation of main french drain at the position, secondary french drain and master
French drain includes the outer layer geotextile protective layer being successively laid with from outside to inside, interlayer particulate rubble filter protection layer, internal layer soil
The cross sectional area of work fabric loaded filter and kernel coarse grain drainage blanket, the kernel coarse grain drainage blanket in secondary french drain is less than in main french drain
Kernel coarse grain drainage blanket cross sectional area, the cross section of the cross section of secondary french drain and main french drain is full rubble section, institute
It states full rubble section and is square full rubble section；The quantity of the secondary french drain is multiple.
A kind of above-mentioned loess high roadbed cheuch ground discharge structure, it is characterised in that: the outer layer geotextile protection
Geotextile specification in layer and internal layer geotechnical fibre filter layer is not less than 300g/m2, outer layer geotextile protective layer and interior
Geotextile tensile strength in layer geotechnical fibre filter layer is not less than 6kN/m, outer layer geotextile protective layer and internal layer soil
Geotextile infiltration coefficient in work fabric loaded filter is 5 × 10-2Cm/s~5 × 10-1cm/s。
A kind of above-mentioned loess high roadbed cheuch ground discharge structure, it is characterised in that: the interlayer particulate rubble anti-filter
The partial size of particulate rubble is less than 5cm in protective layer, and the partial size of coarse grain is 5cm~20cm in the kernel coarse grain drainage blanket, described
The clay content of interlayer particulate rubble filter protection layer and the kernel coarse grain drainage blanket is no more than 5%.
Above-mentioned a kind of loess high roadbed cheuch ground discharge structure, it is characterised in that: the square of the main french drain is complete
Rubble cross dimensions is not less than 2.5m × 2.5m, and the full rubble cross dimensions of the square of secondary french drain is not less than 1.5m × 1.5m.
Above-mentioned a kind of loess high roadbed cheuch ground discharge structure, it is characterised in that: the secondary french drain and main french drain
The gradient is 3 °~45 °.
Above-mentioned a kind of loess high roadbed cheuch ground discharge structure, it is characterised in that: have in the original loess foundation
Multiple steep basement rock, steep basement rock are located between adjacent two sections french drain segments or adjacent two sections of main french drain segments, and the steep basement rock is high
Degree is not more than 2m, and the highly steep basement rock no more than 2m is trimmed to the slope base that height is not more than 2m by way of manual amendment
Rock, the gradient of the slope basement rock are 30 °~45 °, and oblique main french drain segment or oblique french drain segment are laid on the slope basement rock
On, adjacent two sections french drain segments pass through oblique main french drain segment by tiltedly time french drain segment connection, adjacent two sections of main french drain segments
Connection.
A kind of above-mentioned loess high roadbed cheuch ground discharge structure, it is characterised in that: the steep basement rock height is greater than 2m,
The secondary french drain segment or main french drain segment of steep basement rock two sides are spread between the straight french drain of transition and steep basement rock by transition straight french drain connection
It is lined with rubble transition body, the partial size of the rubble in the rubble transition body is 10cm~30cm, and the rubble transition body contains mud
Amount is not more than 5%, and the gradient of the straight french drain of transition is 40 °~45 °, the cross section of the cross-sectional configuration of the straight french drain of transition and time french drain
The cross-sectional configuration of structure and main french drain is all the same.
A kind of above-mentioned loess high roadbed cheuch ground discharge structure, it is characterised in that: the edge of the original loess foundation
Cheuch slopes have steep rock matter slopes, are provided with vertical drainage french drain on the steep rock matter slopes inner wall, vertical drainage is blind
The size of ditch is not more than the size of time french drain, and the bottom of vertical drainage french drain is main by being connected at the top of main even french drain and main french drain
Even the size of french drain is not more than the size of time french drain, and the gradient of main even french drain is 3 °~5 °.
A kind of above-mentioned loess high roadbed cheuch ground discharge structure, it is characterised in that: the top of the steep rock matter slopes
Portion has time french drain, and the top of vertical drainage french drain connects french drain by time and is connected to time french drain, and the size of secondary even french drain is not more than
The gradient of the size of secondary french drain, secondary even french drain is 3 °~5 °, the cross section of the cross-sectional configuration of vertical drainage french drain, main even french drain
The cross-sectional configuration of structure and secondary even french drain is identical as the cross-sectional configuration of secondary french drain.
Compared with the prior art, the utility model has the following advantages:
1, the utility model is according to original water system situation, Combining with terrain concrete condition, not change or destroy original water system
Condition be principle, protect original cheuch water system environment not to be destroyed, convenient for promote the use of.
2, the utility model on the outside of interlayer particulate rubble filter protection layer by being arranged outer layer geotextile protective layer, tool
Standby stress buffer, compatibility of deformation, coarse granule filter triple role, in being arranged on the inside of interlayer particulate rubble filter protection layer
Layer geotechnical fibre filter layer, fine grained reverse filter effect guarantee that water quality is limpid, guarantee that kernel coarse grain drainage blanket not by silting, passes through
Kernel coarse grain drainage blanket specially undertakes drainage, and partial size is coarse, and porosity is high, drains unobstructed, reliable and stable, using effect
It is good.
3, the utility model is full rubble section using time cross section of french drain and the cross section of main french drain, and full rubble is disconnected
Face is square full rubble section, and construction technology is easy, and it is original to can effectively solve existing loess high roadbed engineering for strong operability
Cheuch ground drainage problem avoids the rising of engineering later period water level from causing the excessive slaking deformation of engineering and sedimentation, loess is effectively ensured
The construction quality and safety of high roadbed engineering.
In conclusion the utility model is novel in design rationally, by being arranged on the outside of interlayer particulate rubble filter protection layer
Outer layer geotextile protective layer has stress buffer, compatibility of deformation, coarse granule filtering triple role, by broken in interlayer particulate
Internal layer geotechnical fibre filter layer is set on the inside of stone filter protection layer, and fine grained reverse filter effect guarantees that water quality is limpid, guarantees that kernel is thick
Grain drainage blanket can effectively solve the original gully karness base drainage problem of existing loess high roadbed engineering, after avoiding engineering not by silting
The rising of phase water level causes the excessive slaking deformation of engineering and sedimentation, the construction quality of loess high roadbed engineering and complete is effectively ensured, just
It is promoted the use of in during engineering practice.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the arrangement schematic diagram for the discharge structure that the utility model uses.
Fig. 2 is the main french drain of the utility model, secondary french drain, transition french drain, vertical drainage french drain, main even french drain and secondary even french drain
Structure section schematic diagram.
Fig. 3 is the connectivity structure schematic diagram of the main french drain of the utility model and time french drain.
Fig. 4 is the connection relationship diagram of the straight french drain of the utility model transition and main french drain or secondary french drain.
Fig. 5 is the connection relationship diagram of the utility model vertical drainage french drain and main french drain and time french drain.
Description of symbols:
1-outer layer geotextile protective layer；2-interlayer particulate rubble filter protection layers；
3-internal layer geotechnical fibre filter layers；4-kernel coarse grain drainage blankets；
5-former loess foundations；6-steep basement rock；7-embankment soil layers；
8-rubble transition bodies；9-main french drains；10-secondary french drains；
The straight french drain of 11-transition；12-vertical drainage french drains；13-main even french drains；
14-secondary even french drains；15-steep rock matter slopes.
Specific embodiment
As shown in Figure 1 to Figure 3, a kind of loess high roadbed cheuch ground discharge structure described in the utility model, including edge
Tap drain extending direction is laid on the main french drain 9 on former loess foundation 5 and the Zhigou along original land in gully in original land in gully
The secondary french drain 10 that extending direction is laid on former loess foundation 5 and is connected to main french drain 9, secondary french drain 10 are connected to position with main french drain 9
The basal surface elevation for setting place is equal with the basal surface elevation of main french drain 9 at the position, secondary french drain 10 and main french drain 9 include by
Outer outer layer geotextile protective layer 1, the interlayer particulate rubble filter protection layer 2, internal layer geotechnical fibre filter being successively laid in
Layer 3 and kernel coarse grain drainage blanket 4, the cross sectional area of the kernel coarse grain drainage blanket 4 in secondary french drain 10 are less than interior in main french drain 9
The cross sectional area of core coarse grain drainage blanket 4, the cross section of secondary french drain 10 and the cross section of main french drain 9 are full rubble section, institute
It states full rubble section and is square full rubble section；The quantity of the secondary french drain 10 is multiple.
It should be noted that tap drain extending direction is laid on the main french drain 9 on former loess foundation 5 along original land in gully
With along original land in gully Zhigou extending direction be laid on former loess foundation 5 and the secondary french drain 10 that is connected to main french drain 9
Purpose, not change or destroy original water-based condition as principle, is protected according to original water system situation, Combining with terrain concrete condition
Original cheuch water system environment has been protected not to be destroyed；Basal surface elevation and the position at secondary french drain 10 and main 9 communicating position of french drain
The basal surface elevation of the main french drain 9 at place is equal, guarantees the stabilization that time french drain 10 is drained to main french drain 9, avoids different water level pressures
Difference is interfered caused by main french drain 9, and secondary french drain 10 and main french drain 9 include that the outer layer geotextile being successively laid with from outside to inside is prevented
Sheath 1, interlayer particulate rubble filter protection layer 2, internal layer geotechnical fibre filter layer 3 and kernel coarse grain drainage blanket 4, by interlayer
Outer layer geotextile protective layer 1 is set on the outside of particulate rubble filter protection layer 2, has stress buffer, compatibility of deformation, coarse granule mistake
Triple role is filtered, by the way that internal layer geotechnical fibre filter layer 3 is arranged on the inside of interlayer particulate rubble filter protection layer 2, fine grained is anti-
Filter effect guarantees that water quality is limpid, guarantees that kernel coarse grain drainage blanket 4 not by silting, passes through the special row of undertaking of kernel coarse grain drainage blanket 4
Water effect, partial size is coarse, and porosity is high, and draining is unobstructed, reliable and stable；Kernel coarse grain drainage blanket 4 in secondary french drain 10 it is cross-section
The purpose that face area is less than the cross sectional area of the kernel coarse grain drainage blanket 4 in main french drain 9 is to avoid the draining pair of time french drain 10
The impact of main french drain 9, the cross section of secondary french drain 10 and the cross section of main french drain 9 are full rubble section, the full rubble section
It is square full rubble section, construction technology is easy, and strong operability can effectively solve existing loess high roadbed engineering primitive groove
Valley floor base drainage problem avoids the rising of engineering later period water level from causing the excessive slaking deformation of engineering and sedimentation, loess height is effectively ensured
The construction quality and safety of embankment engineering.
Geotextile rule in the present embodiment, in the outer layer geotextile protective layer 1 and internal layer geotechnical fibre filter layer 3
Lattice are not less than 300g/m2, the geotextile tension in outer layer geotextile protective layer 1 and internal layer geotechnical fibre filter layer 3 is strong
Degree is not less than 6kN/m, the geotextile infiltration coefficient in outer layer geotextile protective layer 1 and internal layer geotechnical fibre filter layer 3
It is 5 × 10-2Cm/s~5 × 10-1cm/s。
In the present embodiment, the partial size of particulate rubble is less than 5cm in the interlayer particulate rubble filter protection layer 2, described interior
The partial size of coarse grain is 5cm~20cm in core coarse grain drainage blanket 4, and the interlayer particulate rubble filter protection layer 2 and the kernel are thick
The clay content of grain drainage blanket 4 is no more than 5%.
In the present embodiment, the full rubble cross dimensions of the square of the main french drain 9 is not less than 2.5m × 2.5m, secondary french drain 10
The full rubble cross dimensions of square be not less than 1.5m × 1.5m.
In the present embodiment, the gradient of the secondary french drain 10 and main french drain 9 is 3 °~45 °.
It should be noted that the gradient of secondary french drain 10 and main french drain 9 is configured according to actual terrain slope, secondary french drain
10 and main french drain 9 the gradient be 3 °~45 °, when actual terrain slope be greater than 45 ° when, adjusted by way of artificial correction to
In 3 °~45 ° range of grade.
As shown in figure 4, there are multiple steep basement rock 6 in the original loess foundation 5, steep basement rock 6 is located at adjacent in the present embodiment
Between two sections french drain segments or adjacent two sections of main french drain segments, steep 6 height of basement rock is not more than 2m, highly no more than 2m's
Steep basement rock 6 is trimmed to the slope basement rock that height is not more than 2m by way of manual amendment, and the gradient of the slope basement rock is 30 °
~45 °, oblique main french drain segment or oblique french drain segment are laid on the slope basement rock, and adjacent two sections french drain segments pass through oblique
Secondary french drain segment connection, adjacent two sections of main french drain segments pass through tiltedly main french drain segment connection.
It is not more than it should be noted that steep basement rock 6 of the height no more than 2m is trimmed to height by way of manual amendment
The slope basement rock of 2m in practice of construction, is cut brokenly steep basement rock 6 by the way of explosion.
In the present embodiment, steep 6 height of basement rock is greater than 2m, the secondary french drain segment or main french drain segment of steep 6 two sides of basement rock
It is connected to by the straight french drain 11 of transition, place mat has rubble transition body 8, the rubble transition between the straight french drain 11 of transition and steep basement rock 6
The partial size of rubble in body 8 is 10cm~30cm, and the clay content of the rubble transition body 8 is not more than 5%, the straight french drain 11 of transition
The gradient is 40 °~45 °, the cross-sectional configuration of the cross-sectional configuration of the straight french drain 11 of transition and secondary french drain 10 and main french drain 9 it is cross-section
Face structure is all the same.
It should be noted that, according to the mode of explosion, the explosive charge for needing to consume is big when steep 6 height of basement rock is greater than 2m,
There are security risks for construction, therefore, carry out support pad to steep basement rock 6 using rubble transition body 8, guarantee that main french drain or secondary french drain are laid with
Steadily.
As shown in figure 5, the marginal ditch brae body of the original loess foundation 5 has steep rock matter slopes 15 in the present embodiment,
Vertical drainage french drain 12 is provided on steep 15 inner wall of rock matter slopes, the size of vertical drainage french drain 12 is not more than time french drain
10 size, the bottom of vertical drainage french drain 12 at the top of main even french drain 13 and main french drain 9 by being connected to, the size of main even french drain 13
No more than the size of secondary french drain 10, the gradient of main even french drain 13 is 3 °~5 °.
In the present embodiment, the top of the steep rock matter slopes 15 has time french drain 10, the top of vertical drainage french drain 12
It is connected to by secondary even french drain 14 with time french drain 10, the size of secondary even french drain 14 is not more than the size of time french drain 10, secondary even french drain 14
The gradient be 3 °~5 °, the cross-sectional configuration of vertical drainage french drain 12, it is main even french drain 13 cross-sectional configuration and it is secondary even french drain 14
Cross-sectional configuration it is identical as the cross-sectional configuration of secondary french drain 10.
It should be noted that having steep rock matter slopes 15 in construction area, draining reinforcement solutions need to be carried out, are close to steep
Vertical drainage french drain 12 is arranged in rock matter slopes 15, is connected to, is prevented by main even french drain 13 between vertical drainage french drain 12 and main french drain 9
Only the native rock interface of filling body and slopes forms the artificial lower bleed-through road of relative displacement and natural rain, avoids engineering later period water
Position, which rises, causes the excessive slaking deformation of engineering and sedimentation, and the construction quality and safety of loess high roadbed engineering is effectively ensured.
The utility model construct when, with do not destroy primitive groove bottom water system and do not change it is original flow direction for basic principle, foundation
Original land in gully, to 5 topsoil of loess foundation cleaning former in construction area；And to tap drain in original land in gully and branch bank
Line carries out terrain prospecting, reconnoitres out in original land in gully and goes up steep basement rock present in former loess foundation 5 along tap drain and Zhigou
6；
It is control point with the steep basement rock 6 in former loess foundation 5 upper along tap drain in original land in gully, at 6 liang of steep basement rock
Excavate main french drain groove in the former loess foundation 5 of side along tap drain along original land in gully；Be segmented in main french drain groove into
Row is laid with outer layer geotextile protective layer 1, and the lap of splice between adjacent two sections of outer layer geotextiles protective layer 1 is not less than
30cm；The bottom that interlayer particulate rubble filter protection layer 2 is filled in outer layer geotextile protective layer 1, in interlayer particulate rubble
Internal layer geotechnical fibre filter layer 3 is laid on the bottom of filter protection layer 2, between adjacent two sections of internal layer geotechnical fibre filters layer 3
The lap of splice is not less than 30cm, kernel coarse grain drainage blanket 4 is filled on internal layer geotechnical fibre filter layer 3, while in outer layer geotechnique
The middle layer of interlayer particulate rubble filter protection layer 2 is filled between fabric protective layer 1 and internal layer geotechnical fibre filter layer 3；Outside multistage
In layer geotextile protective layer 1 close to one section of steep basement rock 6 and its close to one end of steep basement rock 6 to be reserved with outer layer geotextile anti-
Sheath segment, the length of the outer layer geotextile protective layer segment are not less than 30cm, in multistage internal layer geotechnical fibre filter layer 3
Close to one section of steep basement rock 6 and it close to one end of steep basement rock 6 is reserved with internal layer geotechnical fibre filter layer segment, the internal layer soil
The length of work fabric loaded filter segment is not less than 30cm；
Kernel coarse grain drainage blanket 4 and interlayer particulate rubble filter protection layer 2 are filled to main french drain groove top surface, and turnup covers
The lap width of lid internal layer geotechnical fibre filter layer 3, internal layer geotechnical fibre filter layer 3 is not less than 30cm；Then in internal layer geotechnique
3 top layer of fabric loaded filter is laid with the top layer of interlayer particulate rubble filter protection layer 2, and turnup covers outer layer geotextile protective layer 1,
The lap width of outer layer geotextile protective layer 1 is not less than 30cm, forms one section of main french drain segment；The height of steep basement rock 6 is measured,
When steep 6 height of basement rock is not more than 2m, steep basement rock 6 is trimmed to height by way of the steep basement rock 6 of explosion and is not more than the oblique of 2m
Slope basement rock, the gradient of the slope basement rock are 30 °~45 °, are connected to two sections of steep 6 two sides of basement rock by one section of oblique main french drain segment
Main french drain segment, oblique main french drain segment are laid on the slope basement rock, structure and the main french drain segment of oblique main french drain segment
Structure is identical；When steep 6 height of basement rock is greater than 2m, the main french drain segment of steep 6 two sides of basement rock is connected to by the straight french drain 11 of transition, mistake
Crossing place mat between straight french drain 11 and steep basement rock 6 has rubble transition body 8, and the partial size of the rubble in the rubble transition body 8 is 10cm
~30cm, the clay content of the rubble transition body 8 are not more than 5%, and the gradient of the straight french drain 11 of transition is 40 °~45 °, and transition is directly blind
The cross-sectional configuration of ditch 11 is identical as the cross-sectional configuration of main french drain 9；
It is control point with the steep basement rock 6 in former loess foundation 5 upper along Zhigou in original land in gully, at 6 liang of steep basement rock
Excavate time french drain groove in the former loess foundation 5 of side along Zhigou along original land in gully, secondary french drain 10 construct process with
Main french drain 9 to construct process consistent；
Kernel coarse grain drainage blanket 4 in secondary french drain 10 is connected to the kernel coarse grain drainage blanket 4 in main french drain 9, secondary french drain
The consistency of thickness of interlayer particulate rubble filter protection layer 2 in 10 and the interlayer particulate rubble filter protection layer 2 in main french drain 9 and
It is interconnected, keeps the substrate of time french drain 10 with the basal surface elevation at main 9 communicating position of french drain and the main french drain 9 at the position
Face elevation is equal；
Geological prospecting is carried out to the cheuch slopes in high roadbed construction area, whether there is steep rock in survey and construction region
Matter slopes 15, when steep rock matter slopes 15 are not present in cheuch slopes, construction terminates；When there are steep rock matter in cheuch slopes
When slopes 15, it is close to steep rock matter slopes 15 and vertical drainage french drain 12 is set, pass through between vertical drainage french drain 12 and main french drain 9
Main even french drain 13 is connected to, and the structure size of the main even french drain 13 is consistent with secondary french drain 10, the gradient of the main even french drain 13
It is 3 °~5 °；The laying of vertical drainage french drain 12 is synchronous with 7 filling construction of embankment soil layer, using embankment work surface as workbench,
Guarantee that the french drain measuring height of section of vertical drainage french drain 12 is higher than the work surface 30cm or more that bankets, it is blind to the vertical drainage for being exposed to outer
The french drain section broken stone of ditch 12 is protected, and the french drain section broken stone filler of Loess Filling incorporation vertical drainage french drain 12 is prevented
In；
There is no when time french drain 10 at the top of steep rock matter slopes 15, vertical drainage french drain 12 along cheuch slopes construct to
Embankment soil layer 7 bankets 20 meters of stoppings constructions below top surface；
When there is time french drain 10 at the top of steep rock matter slopes 15, vertical drainage french drain 12 by time even french drain 14 with it is steep
The secondary french drain 10 at 15 top of rock matter slopes is connected, and the structure size of secondary even french drain 14 is consistent with secondary french drain 10, the secondary company
The gradient of french drain 14 is 3 °~5 °；
When 15 regional scopes of steep rock matter slopes are wide, being close to steep rock matter slopes 15, that multiple tracks vertical drainage is arranged in parallel is blind
The spacing of ditch 12, adjacent twice vertical drainage french drain 12 is 50m~100m, and main company is respectively set in multiple tracks vertical drainage french drain 12
French drain 13 is connected with main french drain 9.
The utility model clear thinking, design are reasonable, step is concise, strong operability, according to original land in gully, tap drain
It is laid with main french drain, Zhigou is laid with time french drain, forms dendroid blind drainage system, and prominent for cheuch the lowest point regional area topography
When change, artificial treatment and transition are carried out, guarantees the whole gradient of drain line, then carry out french drain laying, is rock in cheuch slopes
It is special to prevent the native rock interface of filling body and slopes from forming artificially lower bleed-through road, setting vertical drainage french drain 12 when matter side slope
Item pumping equipment, stabilized structure, porosity are big, draining is unobstructed, silting blocking performance is strong.
The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all
According to any simple modification to the above embodiments of the utility model technical spirit, change and equivalent structural changes, still
Belong in the protection scope of technical solutions of the utility model.
Claims (9)
1. a kind of loess high roadbed cheuch ground discharge structure, it is characterised in that: including along original land in gully tap drain extend
The main french drain (9) and Zhigou extending direction is laid on former Huang along original land in gully that direction is laid on former loess foundation (5)
Base at the secondary french drain (10) being connected on soil base (5) and with main french drain (9), secondary french drain (10) and main french drain (9) communicating position
Bottom surface elevation is equal with the basal surface elevation of main french drain (9) at the position, and secondary french drain (10) and main french drain (9) include by outer
It is anti-to interior outer layer geotextile protective layer (1), interlayer particulate rubble filter protection layer (2), the internal layer geotextile being successively laid with
The cross sectional area of filtering layer (3) and kernel coarse grain drainage blanket (4), the kernel coarse grain drainage blanket (4) in secondary french drain (10) is less than master
The cross sectional area of kernel coarse grain drainage blanket (4) in french drain (9), the cross section of secondary french drain (10) and main french drain (9) it is cross-section
Face is full rubble section, and the full rubble section is square full rubble section；The quantity of the secondary french drain (10) is multiple.
2. a kind of loess high roadbed cheuch ground discharge structure described in accordance with the claim 1, it is characterised in that: the outer layer soil
Geotextile specification in work fabric protective layer (1) and internal layer geotechnical fibre filter layer (3) is not less than 300g/m2, outer layer soil
Geotextile tensile strength in work fabric protective layer (1) and internal layer geotechnical fibre filter layer (3) is not less than 6kN/m, outer layer
Geotextile infiltration coefficient in geotextile protective layer (1) and internal layer geotechnical fibre filter layer (3) is 5 × 10-2Cm/s~5
×10-1cm/s。
3. a kind of loess high roadbed cheuch ground discharge structure described in accordance with the claim 1, it is characterised in that: the interlayer is thin
The partial size of particulate rubble is less than 5cm in grain rubble filter protection layer (2), the partial size of coarse grain in the kernel coarse grain drainage blanket (4)
For 5cm~20cm, the clay content of the interlayer particulate rubble filter protection layer (2) and the kernel coarse grain drainage blanket (4) is not
Greater than 5%.
4. a kind of loess high roadbed cheuch ground discharge structure described in accordance with the claim 1, it is characterised in that: the main french drain
(9) the full rubble cross dimensions of square is not less than 2.5m × 2.5m, and the full rubble cross dimensions of the square of secondary french drain (10) is not
Less than 1.5m × 1.5m.
5. a kind of loess high roadbed cheuch ground discharge structure described in accordance with the claim 1, it is characterised in that: the secondary french drain
(10) and the gradient of main french drain (9) is 3 °~45 °.
6. a kind of loess high roadbed cheuch ground discharge structure described in accordance with the claim 1, it is characterised in that: the original loess
Regional area has steep basement rock (6) in ground (5), and steep basement rock (6) is located at adjacent two sections french drain segments or adjacent two sections of masters are blind
Between ditch segment, the steep basement rock (6) is highly not more than 2m, is highly not more than the side that the steep basement rock (6) of 2m passes through manual amendment
Formula is trimmed to the slope basement rock that height is not more than 2m, and the gradient of the slope basement rock is 30 °~45 °, oblique main french drain segment or oblique
Secondary french drain segment is laid on the slope basement rock, and adjacent two sections french drain segments are connected to by tiltedly time french drain segment, and adjacent two
The main french drain segment of section passes through tiltedly main french drain segment connection.
7. a kind of loess high roadbed cheuch ground discharge structure according to claim 6, it is characterised in that: the steep basement rock
(6) highly it is greater than 2m, the secondary french drain segment or main french drain segment of steep basement rock (6) two sides are connected to by the straight french drain of transition (11), mistake
Crossing place mat between straight french drain (11) and steep basement rock (6) has rubble transition body (8), the grain of the rubble in the rubble transition body (8)
Diameter is 10cm~30cm, and the clay content of the rubble transition body (8) is not more than 5%, the gradient of the straight french drain of transition (11) is 40 °~
45 °, the cross-sectional configuration of the straight french drain of transition (11) and time cross-sectional configuration of french drain (10) and the cross-sectional configuration of main french drain (9)
It is all the same.
8. a kind of loess high roadbed cheuch ground discharge structure described in accordance with the claim 1, it is characterised in that: the original loess
The marginal ditch brae body of ground (5) has steep rock matter slopes (15), is provided on steep rock matter slopes (15) inner wall perpendicular
To weeper drain (12), the size of vertical drainage french drain (12) is not more than the size of time french drain (10), vertical drainage french drain (12)
Bottom by be connected at the top of main even french drain (13) and main french drain (9), the size of main even french drain (13) is no more than secondary french drain (10)
Size, it is main even french drain (13) the gradient be 3 °~5 °.
9. a kind of loess high roadbed cheuch ground discharge structure according to claim 8, it is characterised in that: the steep rock
The top of matter slopes (15) has time french drain (10), and the top of vertical drainage french drain (12) passes through secondary even french drain (14) and time french drain
(10) it being connected to, the size of secondary even french drain (14) is not more than the size of time french drain (10), and the gradient of secondary even french drain (14) is 3 °~5 °,
The cross section knot of the cross-sectional configuration of vertical drainage french drain (12), the main even cross-sectional configuration of french drain (13) and secondary even french drain (14)
Structure is identical as the cross-sectional configuration of secondary french drain (10).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109610435A (en) * | 2019-01-29 | 2019-04-12 | 中国机械设备工程股份有限公司 | A kind of loess high roadbed cheuch ground discharge structure and its laying method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610435A (en) * | 2019-01-29 | 2019-04-12 | 中国机械设备工程股份有限公司 | A kind of loess high roadbed cheuch ground discharge structure and its laying method |
| CN109610435B (en) * | 2019-01-29 | 2023-09-12 | 中国机械设备工程股份有限公司 | Loess high fill valley foundation drainage structure and laying method thereof |
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