CN217601109U - Soft soil roadbed structure reinforced by combining geocell with light foam soil - Google Patents

Abstract

The utility model relates to a soft soil roadbed structure that geotechnique's check room unites light foam soil to consolidate, include bed course, foam layer, the packing layer that from bottom to top set gradually, the inside geotechnique's check room that is provided with of bed course, the bed course below is equipped with a plurality of piles bodies that are used for inserting the soil matrix, the utility model discloses a roadbed structure can reduce subside and the inhomogeneous settlement after the road bed is under construction for a long time by a wide margin.

Description

Soft soil roadbed structure reinforced by combining geocell with light foam soil

Technical Field

The utility model relates to a road bed technical field, concretely relates to soft soil roadbed structure that geotechnique's check room unites light foam soil reinforcement.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The soft soil has the remarkable characteristics of high water content, low strength, large compressibility and the like, and in actual engineering, a soft foundation often has two common characteristics, namely large long-term settlement and obvious uneven settlement. Because the water content in the soft soil foundation is large and most of clay is small, the permeability is small, and the soil body is difficult to completely solidify in a short period even by adopting methods such as vacuum preloading and the like, so that the soil body can be always solidified and deformed in the process of putting engineering construction into use, and the long-term settlement is large; under the influence of the dead weight and the soft foundation of the upper embankment, the middle of the roadbed deforms greatly, the two sides deform little, and the uneven settlement of the soft foundation embankment is obvious. The factors cause the subgrade to be damaged in different degrees, so that the damage can be effectively reduced or relieved by two schemes of reducing the self weight of the upper embankment and reinforcing the soft foundation from the root of the damage.

When engineering construction such as a highway embankment is carried out on a soft foundation, the soft foundation treatment is required. At present, the method of vertical reinforcement composite foundation is mostly adopted in the engineering to carry out soft foundation treatment. The filling and replacement cushion layer is generally only suitable for the working condition that the thickness of the soft foundation is less than 3m, and the low-strength piles are preferably combined for combined treatment along with the increase of the thickness of the soft foundation. The vertical pile body is mainly made of materials with a drainage function, such as broken stones, and on one hand, a moisture channel can be provided to promote moisture in the soft foundation to be drained; on the other hand, the pile body and the compacted soil around the pile can bear the upper load together, so that the bearing capacity of the soft foundation is increased. And the transverse broken stone mattress layer mainly has the functions of increasing pile-soil interaction and promoting transverse drainage. In engineering, most mattress layers can better achieve the two functions, but the inventor finds that the mattress layers are greatly deformed due to higher load and overlarge load of the upper embankment and weaker bending rigidity of the mattress layers in some cases. And for the working conditions of partial high embankments and the like, the upper filling soil has high thickness and great weight, so that the economic cost is too high or the treatment effect is not obvious if only the soft foundation treatment is started.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of above-mentioned prior art, providing a soft soil roadbed structure that geotechnique's check room unites light foam soil reinforcement, can not have the differential settlement after reducing the road bed long-term construction by a wide margin.

An embodiment of the utility model provides a soft soil roadbed structure that geotechnique's check room unites light foam soil to consolidate, include bed course, foam layer, the packing layer that from bottom to top set gradually, the inside geotechnique's check room that is provided with of bed course, the bed course below is equipped with a plurality of piles bodies that are used for inserting the soil matrix.

Optionally, the geocell adopts a single layer or multiple layers distributed up and down.

Optionally, the thickness of the geocell is 50mm-150mm.

Optionally, the diaphragm of the geocell is provided with a hole.

Optionally, the thickness of the cushion layer is 0.3m-1m.

Optionally, the thickness of the foam soil layer is 1/3-1/2 of the total thickness of the soft soil roadbed structure.

Optionally, the foam soil layer sets up the movement joint along the longitudinal direction interval of soft soil roadbed by setting for the distance.

Optionally, the set distance is 12m-18m.

Optionally, the width of the deformation joint is 1cm-2cm.

Optionally, the pile body is a flexible pile.

Above-mentioned the utility model discloses an embodiment's beneficial effect as follows:

the utility model discloses a roadbed structure, through set up geotechnological check room in the bed course, the homogenization stress distribution, the bearing capacity of weak soil foundation has been improved, foamed soil layer has been adopted simultaneously, foamed soil layer has the dead weight light, the advantage that intensity is high, after the foamed soil layer of filling certain thickness is traded in the bed course top, when lightening the whole dead weight of road bed, the overall stability of road bed has also been improved, the bed course that has jointly set up geotechnological check room again, can reach the treatment effect of ideal, reduce subside and the differential settlement after the road bed is under construction for a long time by a wide margin.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

the concrete comprises a cushion layer 1, a foam soil layer 2, a filler layer 3, a geocell 4, a flexible pile 5 and a pavement layer 6.

Detailed Description

Example 1

As shown in fig. 1, the embodiment discloses a soft soil roadbed structure reinforced by combining light foam soil in a geocell, the cross section of the soft soil roadbed structure is an isosceles trapezoid, a cushion layer 1, a foam soil layer 2 and a packing layer 3 are sequentially arranged from bottom to top, and a plurality of pile bodies used for inserting a soil foundation are arranged below the cushion layer.

In this embodiment, the bedding course is used for laying on the surface of the soil foundation, the thickness of the bedding course is 0.3m-1m, when the load borne by the roadbed under partial conditions is large, the bedding course is easy to deform, and for the condition, when the bedding course is laid, the geocell 4 is embedded in the bedding course.

The geocell is buried by one layer or a plurality of layers distributed up and down according to the actual situation.

The geocell is a three-dimensional reticular cell structure formed by welding reinforced HDPE membrane materials with high strength, has higher lateral restriction, anti-skidding and anti-deformation capabilities, and can effectively enhance the bearing capacity and the dispersed load effect of a roadbed.

The geometric dimensions such as the height of the geocell and the welding distance can be changed to meet different engineering requirements, in the embodiment, the height of the geocell is 50mm-150mm, and the welding distance is 200mm-400mm.

In the embodiment, the geocell is embedded in the cushion layer, and the three-dimensional honeycomb side limit function of the geocell can greatly improve the bending strength of the cushion layer, obviously improve the apparent cohesive force of a soil body and reduce the deformation of the soil body.

The bedding course adopts the rubble to lay and forms, and is corresponding, set up a plurality of holes on geotechnological check room's the diaphragm, can provide the side direction drainage channel.

In this embodiment, the pile body is a flexible pile 5, such as a sand pile or a mixing pile, which is inserted into the soil foundation to form a flexible pile composite foundation for enhancing the bearing capacity and stability of the soil foundation.

Through the bed course and a plurality of flexible pile of burying geotechnological check room underground, soft soil road bed can reach the engineering requirement under bed course and flexible pile dual function, but when the road bed degree of depth is great, if only handle from the bed course, economic cost is too high, sometimes the treatment effect is not obvious.

Therefore, in this embodiment, a foam soil layer is laid above the cushion layer, and the foam soil layer is used for replacement and filling. The foam soil layer is made of foam light concrete, the foam light concrete is a light building material and is formed by mixing cement, soil, foam and the like, the foam soil layer has the advantages of being porous, light in self weight and high in strength, and if the foam soil layer with a set thickness is adopted to replace and fill roadbed fillers in the roadbed construction process, the self weight of the roadbed can be obviously reduced, and meanwhile, the overall stability of the roadbed is also improved.

Because the foam lightweight concrete is a brittle material with higher rigidity, and the foam soil layer roadbed belongs to large-volume concrete construction, the foam soil layer is not suitable to be used with larger thickness, in the embodiment, the thickness of the foam soil layer is 1/3-1/2 of the thickness of the whole roadbed, and the foam soil layer adopts a construction scheme of layered pouring.

The foam soil layer is provided with a deformation joint at a set distance along the longitudinal direction of the roadbed, the set distance is 12m-18m, in the embodiment, the set distance is 15m, namely, a deformation joint needs to be reserved every time a 15m foam soil layer is laid along the longitudinal direction, and the width of the deformation joint is 1cm-2cm.

And a packing layer is laid on the foam soil layer, and the packing layer is laid by adopting a packing adopted in the construction of the conventional roadbed.

The construction method of the roadbed structure comprises the following steps:

and a plurality of flexible piles are driven into the soil foundation to form a flexible pile composite foundation, so that the bearing capacity of the soil foundation is enhanced.

And (3) paving a cushion layer on the soil foundation, paving the geocell after the cushion layer is paved to a set thickness, and continuing to lay the cushion layer until the cushion layer reaches the set thickness after the geocell is paved.

After the cushion layer is paved, a foam soil layer is paved on the cushion layer, the foam soil layer is constructed by layered pouring, and a deformation joint is reserved after 15m of longitudinal spacing along the roadbed.

After the construction of the foam soil layer is completed, a packing layer is laid on the foam soil layer until the designed roadbed depth is reached.

And after the roadbed construction is finished, paving a pavement layer 6 on the surface of the roadbed to finish the construction of the whole road structure.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (10)

1. The utility model provides a soft soil roadbed structure that geotechnique's check room unites light foam soil to consolidate which characterized in that includes bed course, foam soil layer, the packing layer that from bottom to top set gradually, the inside geotechnique's check room that is provided with of bed course, the bed course below is equipped with a plurality of piles bodies that are used for inserting the soil matrix.

2. A soft soil subgrade structure reinforced by geocells in combination with lightweight foam soil according to claim 1, wherein the geocells are single-layered or multi-layered distributed up and down.

3. A soft soil subgrade structure reinforced by geocells in combination with lightweight foam soil according to claim 1, wherein the thickness of the geocells is 50mm-150mm.

4. A soft soil roadbed structure reinforced by geocell combined with light foam soil as claimed in claim 1, wherein the diaphragm of the geocell is provided with holes.

5. A soft soil subgrade structure reinforced by geocell in combination with lightweight foam soil according to claim 1, wherein the thickness of the underlayment is 0.3m to 1m.

6. A soft soil roadbed structure reinforced by the combination of earthwork standard cells and light foam soil as claimed in claim 1, wherein the thickness of the foam soil layer is 1/3-1/2 of the total thickness of the soft soil roadbed structure.

7. A soft soil roadbed structure reinforced by the combination of earthwork standard cells and light foam soil as claimed in claim 1, wherein the foam soil layer is provided with deformation joints at set intervals along the longitudinal direction of the soft soil roadbed.

8. A soft soil roadbed structure reinforced by the geocell combined with the lightweight foam soil as claimed in claim 7, wherein the set distance is 12m-18m.

9. A soft soil subgrade structure reinforced by geocell in combination with lightweight foam soil according to claim 8, wherein the deformation joint has a width of 1cm to 2cm.

10. A soft soil roadbed structure reinforced by the combination of earthwork standard cells and light foam soil as claimed in claim 1, wherein the pile body is a flexible pile.

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