CN217480203U - Roadbed slope drainage - Google Patents

Abstract

The utility model discloses a side slope drainage of roadbed, the outside of vertical infiltration ditch (5) laid geotechnological cloth (3), the upper portion of vertical infiltration ditch (5) pour concrete and enlarge basis (E) the concrete enlarge the upper portion of basis (E) and build cutting wall (D) by laying bricks or stones, the wall of cutting wall (D) be provided with a plurality of drain pipe (2), excavation has in advance cutting wall (D) wall back of the body adopt the rubble piece to backfill formation rubble backfill soil structure (1), the toe department of cutting wall (D) be provided with drainage side ditch (G), it has overcome the shortcoming that can't satisfy a great deal of complex problems in the actual engineering among the prior art, has construction simple and convenient, the reliability is high, the advantage that the cost is low.

Description

Roadbed slope drainage

Technical Field

The utility model relates to the technical field of drainage side slope, more specifically a road bed drainage.

Background

In the process of road construction, groundwater and activities thereof bring great harm to the safety and stability of the roadbed. Especially, in areas with large rainfall, after the cutting slope is excavated, multiple strands of dew are easily formed in the large range by the stagnant water on the upper layer, the formed osmotic pressure, the hydrostatic pressure formed by unsmooth drainage behind the wall, the shear strength of the soil body is reduced, the safety coefficient of the slope is greatly reduced, the slope instability is easily caused, and the damage is brought to the safe operation of the road.

At present, drainage facilities such as underdrains, seepage wells, seepage ditches and the like are generally adopted for the drainage problem of side slope underground water, or the source is plugged. However, the above methods cannot satisfy many complex problems in practical engineering, and particularly for treating large-scale multiple exposed underground water, a drainage form with better drainage performance, simple structure, economy and reasonableness is urgently needed.

Therefore, a structure for solving the above problems is urgently needed.

Disclosure of Invention

The utility model aims to overcome the weak point of above-mentioned background art, and provide a road bed drainage.

The utility model aims at being implemented through the following technical scheme: a roadbed slope drainage method includes that loose slope soil of original state soil is excavated temporarily in advance to form a temporary slope, longitudinal infiltration ditches are paved at the bottom of the temporary slope,

geotextile is laid outside the longitudinal infiltration ditch, a concrete expansion foundation is poured on the upper part of the longitudinal infiltration ditch, a cutting wall is built on the upper part of the concrete expansion foundation,

cutting wall's wall be provided with a plurality of drain pipe, digging in advance cutting wall's wall back of the body adopt the rubble piece to backfill and form rubble backfill soil structure, cutting wall's wall toe department be provided with the gutter, the outlet of gutter and drain pipe accept, the bottom of gutter meet with vertical infiltration ditch, along perpendicular to road and vertical infiltration ditch direction interval arrangement have horizontal french drain.

In the above technical scheme: the plurality of the drainage pipes are integrally arranged in a quincunx shape, and the distance between the drainage pipes is 1 meter multiplied by 1 meter.

In the above technical scheme: the inside gravel soil structure that adopts the water permeability to be good of horizontal french drain fill, the bottom of horizontal french drain laid waterproof geotechnological cloth, the top is provided with the geotechnological cloth that permeates water.

In the above technical scheme: the top of the transverse blind ditch is provided with permeable geotextile, and the laying length of the permeable geotextile is consistent with the ditch length of the transverse blind ditch.

In the above technical scheme: the top of the transverse blind ditch is provided with a gravel transition layer, the laying range of the gravel transition layer is consistent with that of the transverse blind ditch, and the upper part of the gravel transition layer is laid with a pavement structure layer.

The utility model has the advantages of as follows: the utility model discloses a groundwater loops through drainage channels such as rubble backfill soil behind the wall, drain pipe, gutter, vertical infiltration ditch, horizontal french drain and natural french drain behind the wall, whole alright in order to reach the advantage of dredging the side slope in the groundwater in the soil body behind the quick discharge wall, keep the road bed stable.

2. The utility model discloses use and utilize natural rubble material and geotechnological cloth to form solid drainage channel as the owner, compare with reinforced concrete structures such as current drainage culvert, the construction is simple and convenient, and the reliability is high, and the cost is low.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic cross-sectional view of fig. 1 taken along line 1-1.

Fig. 3 is a schematic cross-sectional view of 2-2 in fig. 1.

Fig. 4 is a cross-sectional view of the lateral blind trench of fig. 1.

In the figure: the method comprises the following steps of (1) obtaining an original ground line A, a temporary slope B, a pavement structure layer C, a cutting wall D, a concrete expanded foundation E, a gravel transition layer F, a drainage side ditch G, a road center line H and a gravel backfill structure 1; the drainage pipe 2, geotechnical cloth 3, horizontal french drain 4, vertical infiltration ditch 5, undisturbed soil 6, rubble structure 7, waterproof geotechnical cloth 8, geotechnical cloth 9 that permeates water.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but they are not to be construed as limiting the invention, and are presented by way of example only, and the advantages of the invention will become more apparent and can be easily understood by description.

Referring to FIGS. 1-4: a roadbed side slope drainage method comprises the steps of carrying out temporary excavation on loose side slope soil of undisturbed soil 6 in advance to form a temporary side slope B, paving a longitudinal infiltration ditch 5 at the bottom of the temporary side slope B,

the outer side of the longitudinal infiltration ditch 5 is paved with geotextile 3, the upper part of the longitudinal infiltration ditch 5 is poured with a concrete expanded foundation E, the upper part of the concrete expanded foundation E is built with a cutting wall D,

cutting wall D's wall be provided with a plurality of drain pipe 2, digging in advance cutting wall D wall back of the body adopt the rubble piece to backfill and form rubble backfill soil structure 1, cutting wall D's toe department be provided with gutter G, gutter G accept with the outlet of drain pipe 2, gutter G's bottom and vertical infiltration ditch 5 meet, have horizontal french drain 4 along perpendicular to road and vertical infiltration ditch 5 direction interval arrangement.

The plurality of the drain pipes 2 are integrally arranged in a quincunx shape, and the distance is 1 m multiplied by 1 m, so that the drain can be drained most efficiently on the premise of ensuring the strength of the wall body.

Horizontal french drain 4 inside adopt the gravel soil structure 7 that the water permeability is good to fill, the bottom of horizontal french drain 4 laid waterproof geotechnological cloth 8, the top is provided with geotechnological cloth 9 that permeates water. The geotextile that permeates water forms the inverted filter, prevents that the soil body fine particle from losing, and waterproof geotextile makes the french drain form concentrated drainage channel, prevents that the water from soaking the road bed.

The top of the transverse blind ditch 4 is provided with a permeable geotextile 9, and the laying length of the permeable geotextile 9 is consistent with the ditch length of the transverse blind ditch 4.

The top of the transverse blind ditch 4 is provided with a gravel transition layer F, the paving range of the gravel transition layer F is consistent with that of the transverse blind ditch 4, and the upper part of the gravel transition layer F is paved with a pavement structure layer C. The gravel transition layer F is beneficial to preventing capillary water from invading a pavement structure layer and ensuring that the resilience modulus and the compactness of the road bed meet the design requirements.

The utility model also comprises the following concrete construction steps; firstly, temporarily digging loose side slope soil body of undisturbed soil 6 to form a temporary side slope B, wherein the slope ratio of the temporarily dug temporary side slope B is 1: 1;

secondly, paving a longitudinal infiltration ditch 5 at the bottom of the temporary side slope B for collecting underground water in a treatment range, and paving geotextile 3 outside the longitudinal infiltration ditch 5 for reverse filtration;

thirdly, a concrete expanding foundation E is poured on the upper part of the longitudinal infiltration ditch 5 and is used for flatly flattening the upper load and reducing the extrusion damage of the upper load to the infiltration ditch;

fourthly, building a cutting wall D on the upper portion of the concrete expanded foundation E, wherein the wall body of the cutting wall D is provided with drain pipes 2 in a quincunx arrangement at intervals of 1 m multiplied by 1 m.

Fifthly, backfilling the wall back of the cutting wall D by using broken stones with good water permeability to form a broken stone backfill structure 1, and performing layered rolling, wherein the compaction degree of the broken stone backfill structure 1 is 97% finally;

sixthly, arranging a drainage side ditch G at the toe of the cutting wall D for receiving the water discharged from the drainage pipe 2, wherein the bottom of the drainage side ditch G is connected with the longitudinal infiltration ditch 5, and the bottom of the drainage side ditch G is not lined for draining the accumulated water in the drainage side ditch G into the longitudinal infiltration ditch 5;

seventhly, every 20 meters, arranging transverse blind ditches 4 along the direction vertical to the road and the longitudinal seepage ditches 5, wherein the longitudinal slope of the bottoms of the transverse blind ditches 4 is 5 percent, and the transverse blind ditches are used for discharging accumulated water in the longitudinal seepage ditches 5 to the outside of the roadbed range;

(iii) the size of the transverse blind ditch 4 is shown in figure 4, the gravel soil structure 7 with better water permeability is adopted for filling, the bottom of the gravel soil structure 7 is provided with a waterproof geotextile 8 for preventing water from flowing out to the roadbed, and the top is provided with a permeable geotextile 9 for reverse filtration.

Ninthly, arranging a gravel transition layer F at the top of the transverse blind ditch 4, wherein the laying range of the gravel transition layer F is consistent with that of the transverse blind ditch 4, and the thickness of the gravel transition layer F is 60 cm and is used for preventing capillary water from invading into a pavement structure layer C;

and paving a pavement structure layer C at the upper part of the broken stone transition layer F.

The above-mentioned parts not described in detail belong to the prior art.

Claims (5)

1. The utility model provides a road bed side slope drainage, forms interim side slope (B) to the loose side slope soil body of original state soil (6) excavation temporarily in advance, the bottom of interim side slope (B) laid vertical infiltration ditch (5), its characterized in that:

geotextile (3) is laid outside the longitudinal infiltration ditch (5), a concrete enlarged foundation (E) is poured on the upper part of the longitudinal infiltration ditch (5), a cutting wall (D) is built on the upper part of the concrete enlarged foundation (E),

cutting wall (D) the wall body be provided with a plurality of drain pipe (2), digging in advance cutting wall (D) wall back of the body adopt the rubble piece to backfill and form rubble backfill soil structure (1), cutting wall (D) the toe department be provided with gutter (G), gutter (G) accept with the outlet of drain pipe (2), the bottom of gutter (G) and vertical infiltration ditch (5) meet, have horizontal french drain (4) along perpendicular to road and vertical infiltration ditch (5) direction interval arrangement.

2. The subgrade slope drainage of claim 1, which is characterized in that: the plurality of the drainage pipes (2) are integrally arranged in a quincunx shape, and the distance between the drainage pipes is 1 meter multiplied by 1 meter.

3. A slope drainage according to claim 1 or claim 2, wherein: the inside gravel soil structure (7) that adopts the water permeability to be good of horizontal french drain (4) fill, the bottom of horizontal french drain (4) laid waterproof geotechnological cloth (8), the top is provided with geotechnological cloth (9) of permeating water.

4. A subgrade slope drainage according to claim 3, characterized in that: the top of the transverse blind ditch (4) is provided with a permeable geotextile (9), and the laying length of the permeable geotextile (9) is consistent with the ditch length of the transverse blind ditch (4).

5. The subgrade slope drainage of claim 4, which is characterized in that: the top of the transverse blind ditch (4) is provided with a gravel transition layer (F), the laying range of the gravel transition layer (F) is consistent with the range of the transverse blind ditch (4), and the upper part of the gravel transition layer (F) is laid with a pavement structure layer (C).

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