CN218466558U - Embankment protective structure soaks in weak soil area - Google Patents

Abstract

The utility model discloses a embankment protective structure soaks in weak soil area, this embankment protective structure soaks includes the embankment body, embankment body lower extreme is provided with the rubble bed course, the embankment body includes back pressure berm way, and sets up in the upper slope and the lower slope on back pressure berm way both sides limit, the height of back pressure berm way is 1/3 ~ 1/2 of embankment body height H and is not lower than the design flood level above 50cm; the surface of back pressure dado, upward slope and lower side slope all is provided with spouts plants the layer, the spout of back pressure dado and upward slope plants the layer and all plants herbaceous and bush combination type plant, the layer of planting is planted to spouting of lower side slope has herbaceous plant. The utility model provides a pair of embankment protective structure soaks in weak soil area has characteristics such as road bed stability is high, engineering cost is lower, construction convenience, ecological benefits are good, has better spreading value.

Description

Embankment protective structure soaks in weak soil area

Technical Field

The utility model relates to a road engineering field, concretely relates to embankment protective structure soaks in weak soil area.

Background

The middle hill to the K109+ 600-K110 +000 section right side of the open flat highway is a soft soil roadbed, and the right side is distributed with a fishpond, the typical embankment that soaks is provided, the traditional slope engineering reinforcement measures mostly adopt the gray protection such as stone masonry and concrete spraying, the slope protection modes can solidify the slope from a certain degree, the anti-interference capability of the slope is improved, but more or less adverse effects are caused to the environmental protection and the ecological balance, a large amount of secondary bare land appears and the serious soil erosion and water loss is caused, the unbalance of the ecological environment is easily caused, and the degradation of the ecological system is further aggravated. In addition, in regions with high rainfall intensity (such as south China) the compatibility of engineering materials and slope soil bodies is difficult to ensure, and an engineering structure is easy to be erected, so that the local roadbed slope collapses. During subsequent operation of the highway, the fishpond has the risk of being dug secondarily, so that the stability of the roadbed is easily influenced, and the safety risk is brought to the subsequent operation.

The utility model discloses a chinese utility model patent that publication number is CN214194580U discloses a highway fine grained soil soaks embankment side slope ecological protection structure, including roadbed foundation, connection stock, fine sand fill layer, concrete mould bag, water storage base mould bag, vegetation base and seed mould bag, connecting device I and connecting device II, form stable in structure, airtight water proof, ecological environmental protection's domatic protection system through multi-functional combination mould bag, wrap up fine grained soil roadbed inside stable sealed domatic protection system, overcome the poor defect of fine grained soil soaks embankment water stability, overcome traditional technical scheme with high costs, environmental impact shortcoming such as big. However, this structure has the following problems: 1. the method is not suitable for protecting the immersed embankment in the soft soil area, does not have the effect of back-pressure protecting the road, and has potential safety hazards in the later operation period; 2. adopt plant living bag, connect devices such as stock, the efficiency of construction is lower, and engineering economy is on the low side.

The back pressure protecting road refers to a soil body which has a certain width and thickness and plays a role of back pressure on one side or two sides of the embankment for preventing shearing and slippage of a soft foundation and ensuring stability of a roadbed and filling a road section with a water accumulation height and a road section with a filling height exceeding a critical height. Patent publication No. CN114673041A discloses a soft soil foundation embankment disease treatment construction method, which can treat landslide disease of a soft soil foundation embankment efficiently and quickly and ensure the quality and safety of roads. The construction method comprises the following steps of 1, filling back-pressure guard ways on two sides of a roadbed filling layer, and has the beneficial effects that: the back-pressure guard way plays a role in back pressure on the roadbed filling layer, prevents the shearing and the sliding of a soft soil foundation, ensures the stability of the roadbed filling layer, improves the sliding damage safety coefficient of the whole embankment in construction, and thus achieves the aim of stabilizing the embankment; the construction of back pressure guardrail need not special machines and tools equipment and material, and construction convenience can prevent the landslide disease further to worsen fast effectively, also is applicable to the road of temporarily building simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a embankment protective structure soaks in weak soil area, this protective structure are applicable to the embankment that soaks in weak soil area, can effectively ensure road bed stability, effectively improve the construction progress, and engineering cost is lower to be favorable to restoreing ecological environment, prevent soil erosion and water loss.

In order to realize the purpose, the technical scheme of the utility model is that: the submerged embankment protection structure for the soft soil area comprises an embankment body, wherein a broken stone cushion layer is arranged at the lower end of the embankment body, the embankment body comprises a back-pressure guard way, an upper side slope and a lower side slope, the upper side slope and the lower side slope are arranged on two side edges of the back-pressure guard way, and the height of the back-pressure guard way is 1/3-1/2 of the height H of the embankment body and is not lower than 50cm above a designed flood level; the surface of back pressure dado, upward slope and lower side slope all is provided with spouts plants the layer, the spout of back pressure dado and upward slope plants the layer and all plants herbaceous and bush combination type plant, the layer of planting is planted to spouting of lower side slope has herbaceous plant.

From this, to the embankment that soaks in soft soil area, can effectively realize better back pressure effect through setting up the back pressure berm, can effectively ensure road bed stability, the spraying and planting layer of back pressure berm and upper slope simultaneously all plants herbaceous and the combined plant of bush, the spraying and planting layer of lower slope is planted there is herbaceous plant, but furthest's recovery ecological environment prevents soil erosion and water loss, these plants can directly adopt the construction methods of spray-seeding, it is lower effectively to improve construction progress and engineering cost.

Further, the width of the back pressure guard way is greater than or equal to 8m.

Further, the slope ratio of the ascending slope is 1.5.

Further, the slope ratio of the lower slope is 1.75.

Compared with the prior art, the beneficial effects of the utility model are that:

1. through setting up wide back pressure guardrail, effectively ensure the stability of road bed, isolated the influence of water to the road bed filler to a certain extent, guaranteed the safe distance in the road bed outside, avoid during the follow-up operation of highway, pond secondary excavation produces adverse effect to road bed stability.

2. The surfaces of the back pressure guard way, the upper slope and the lower slope are provided with spray planting layers, herbaceous and shrub combined plants are planted on the spray planting layers of the back pressure guard way and the upper slope, herbaceous plants are planted on the spray planting layer of the lower slope, the plants can be directly sprayed, the construction progress is effectively improved, the construction cost is low, the ecological environment can be restored to the maximum extent, and water and soil loss is prevented.

Drawings

Fig. 1 is a sectional view of the submerged embankment protection structure in the soft soil area of the utility model;

fig. 2 is the utility model discloses the elevation of embankment protective structure soaks in weak soil area.

In the figure, 1, an embankment body; 2. a gravel cushion layer; 3. back pressure protecting the road; 4. ascending a side slope; 5. descending a slope; 6. a pavement; 7. designing a flood level; 8. a ground line; 9. and (5) using a boundary pile.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

As shown in fig. 1 and fig. 2, the submerged embankment protection structure in the soft soil area provided in this embodiment includes an embankment body 1, a gravel cushion layer 2 is disposed at a lower end of the embankment body 1, the embankment body 1 includes a back pressure guard way 3, and an upper side slope 4 and a lower side slope 5 disposed at two side edges of the back pressure guard way 3, and a height of the back pressure guard way 3 is 1/3-1/2 of a height H of the embankment body 1 and is not lower than a designed flood level 7 and 50cm; the surface of backpressure guard way 3, upward slope 4 and lower slope 5 all is provided with spouts plants the layer, the layer of spouting of backpressure guard way 3 and upward slope 4 is planted all to have herbaceous and the combined plant of bush, the layer of spouting of planting of lower slope 5 is planted there is the herbaceous plant.

Specifically, the soft soil under the original embankment is subjected to replacement and filling treatment by adopting pieces and stones to form a broken stone cushion layer 2. The height value of the back pressure guard way 3 needs to meet 1/3-1/2 of the height H of the embankment body 1 and is not lower than 50cm above a designed flood level 7, wherein the requirement that the height value is not lower than 50cm above the designed flood level 7 is that the back pressure guard way is not allowed to be soaked for a long time to cause failure, and 1/3-1/2 of the height H of the embankment body 1 is the conventional requirement of the back pressure guard way, in the embodiment, the height H value of the embankment body 1 is 10m, the height value of the designed flood level is 4.0m, and the height value of the back pressure guard way is selected to be 4.5m according to requirements. The width of the back pressure guard channel 3 is greater than or equal to 8m, and in the embodiment, the width is selected to be 8m. The upper side slope 4 is filled by adopting a slope ratio of 1.

The method follows the growth characteristics of the plant community, accords with local climate and ecological environment, and selects a herbal and shrub combined plant community restoration scheme. The herbaceous plant should be selected from various mixed grass species such as paspalum natatum, sugarcoated meadow grass, pennisetum alopecuroides and the like which are suitable for local growth, and the shrub is selected from albizia julibrissin, phaseolus vulgaris and the like, and can be properly adjusted according to different construction seasons and different slope conditions. The construction requires even spray seeding, the spray seeding layer is divided into a base layer and a surface layer, and the spray seeding layer is matched with a nutrient. In the embodiment, the section is close to the fishpond and mainly still water, the washing strength is light, the section is located on a filling side slope, the soil condition is good, the slope rate of the side slope is slow, the construction method of hydraulic spray seeding is selected by combining the construction period, the environmental protection benefit and the engineering cost, the combination of paspalum natatum, sugarcoated meadowrue and pennisetum natatum is finally selected as the herbaceous plant based on the construction method of hydraulic spray seeding, and the shrub is combined by using the wild green beans and the sildenafia.

For the water-immersed road section in the soft soil area, the roadbed stability can be effectively improved by arranging the wide guard way for back pressure; for the water-immersed road sections with lower water flow scouring strength, such as fish ponds, pond road sections and the like, a herbaceous and irrigated grass combined phytocoenosium restoration scheme is adopted, a hydraulic spray-seeding construction mode is adopted, the construction progress is effectively improved, the construction cost is lower, the ecological environment is guaranteed to the maximum extent, the development from side slope surface erosion to furrow erosion is well controlled, the soil loss is reduced, the water and soil conservation effect is remarkable, after the construction, the adaptability of the section and the local environment is remarkably enhanced, and the expected targets of solidifying the side slope and beautifying the road appearance are achieved.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims (4)

1. A submerged embankment protection structure in a soft soil area comprises an embankment body (1), and is characterized in that a gravel cushion layer (2) is arranged at the lower end of the embankment body (1), the embankment body (1) comprises a back pressure guard channel (3), an upper side slope (4) and a lower side slope (5) which are arranged on two side edges of the back pressure guard channel (3), and the height of the back pressure guard channel (3) is 1/3-1/2 of the height H of the embankment body (1) and is not lower than 50cm above a designed flood level (7); spray-planting layers are arranged on the surfaces of the back-pressure guard way (3), the upper side slope (4) and the lower side slope (5), herbaceous and shrub combined plants are planted on the spray-planting layers of the back-pressure guard way (3) and the upper side slope (4), and herbaceous plants are planted on the spray-planting layers of the lower side slope (5).

2. A submerged embankment protection structure in soft soil areas according to claim 1, characterised in that the width of the back pressure berm (3) is greater than or equal to 8m.

3. A submerged embankment protection structure in soft soil areas according to claim 1, characterised in that the slope ratio of the upper slope (4) is 1.5.

4. A submerged embankment protection structure in soft soil areas according to claim 1, characterised in that the slope ratio of the lower slope (5) is 1.75.

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