CN102587244A

CN102587244A - Stacked geogrid enhanced composite soil roadbed and side slope ecology protection structure thereof

Info

Publication number: CN102587244A
Application number: CN2012100162806A
Authority: CN
Inventors: 尚久駜; 陈化雨
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-19
Filing date: 2012-01-19
Publication date: 2012-07-18

Abstract

The invention discloses a stacked geogrid enhanced composite soil roadbed. The stacked geogrid enhanced composite soil roadbed is composed of a geogrid playing an enhancement effect and soil playing a base material effect, the conventional filling roadbed single soil compression method is changed into a stacked geogrid enhanced composite soil technical method, and gravity action under the roadbed load condition is partially converted into a drawing force to the geogrid, thus the defects that the roadbed settles and deformation amount is high in the conventional technique can be effectively overcome. The invention also discloses a side slope protection structure of the composite soil roadbed, and the side slope protection structure is simple to construct and has water and soil conservation function and the like.

Description

Stacked GSZ enhancement mode composite earth roadbed and protecting slope ecology structure thereof

Technical field

The present invention relates to a kind of earth roadbed and side slope protection structure, relate in particular to the earth roadbed and side slope protection structure of a kind of stacked GSZ.

Background technology

Traditional roadbed technology is set up according to classics " geotechnics " theory; All carried out for the primary structure material for the research of the theory of mechanics of backfill roadbed with soil in the past; There is tangible drawback unavoidably in the achievement of this homogenous material technical research in engineering, for example in order to prevent that subgrade deformation from using retaining wall, roadbed slope more excessive etc. than the limited highway construction land occupation of coefficient area in a large number.In order to change the puzzlement that this conventional art brings, upgrade conventional art with the Modern Combined know-why and be well worth doing.

Summary of the invention

The present invention is intended to overcome subgrade settlement in the prior art, problem that deflection is big, provides a kind of stacked GSZ composite road bed and side slope protection structure.

In order to achieve the above object, technical scheme provided by the invention is:

A kind of stacked GSZ enhancement mode composite earth roadbed, this composite earth roadbed are by GSZ that plays humidification and the soil constitution that plays the base material effect, and GSZ adopts the staggered floor overlapping mode range upon range of; Distance after the subgrade compaction between the two-layer GSZ is 20-25cm, is preferably 20cm, and the 1.5-2m that is spaced apart with layer GSZ is preferably 2m, and the GSZ width is 3.5-4m, is preferably 4m, and GSZ stretches out the length >=5cm of roadbed side slope.

The protecting slope ecology structure of above-mentioned composite earth roadbed, the geotechnological masonry of comprise short pin wall, GSZ, combo box being set a roof beam in place and the soil of geotextiles encapsulation forms; Combo box is set a roof beam in place and is fixed in domatic through the GSZ that stretches out roadbed side slope; Geotechnique's masonry is located at the combo box void space of setting a roof beam in place densely; The top layer GSZ is fixed on combo box sets a roof beam in place; Short pin wall is located at the roadbed bottom, is the GSZ concrete structure, its thickness >=20cm.

The present invention changes into stacked GSZ enhancement mode composite earth technical method with the method for the single soil compression of existing filled-up ground; Make the action of gravity under the embankment load condition; Part changes the tensile force to GSZ into; Thereby effectively improved conventional art subgrade settlement, drawback that deflection is big, also simplified the guard technology means of roadbed side slope thus.

The present invention adopts GSZ to strengthen the principle of soil mechanics performance, with the method for stacked GSZ composite earth roadbed, has thoroughly changed the force way of conventional art roadbed, has realized strengthening the function of the anti-deformation of roadbed; This composite earth roadbed be by repeat again after the backfill of layering setting=GSZ compacting to be provided with, the mode of compacting realizes; Because the setting of multilayer GSZ, embankment load pressure is the tensile force of GSZ through the role transformation of GSZ, the stability of roadbed of fundamentally having improved embankment load performance, permanently effective raising greatly; Because mechanical index such as the native power of this stacked GSZ enhancing composite earth roadbed active greatly reduce, and there is no need in principle to be provided with especially in order to prevent the retaining wall of subgrade deformation again; When the stacked GSZ of roadbed is set, can reserve GSZ greater than 5cm outside the roadbed backfill, the mechanics that is used for the roadbed side slope protective layer structure connects; The side slope protection bottom of this roadbed can adopt GSZ to strengthen concrete mode sloping bottom structure is set; Prevent that ponding from corroding roadbed, the frame mode of the domatic employing compound frame letter in its top beam+geotechnological masonry+GSZ that geotextiles encapsulation soil forms realizes having the ecology bank protection mode of water and soil conservation function.

Economic benefit of the present invention and obvious social benefit, the project total cost after the enforcement is a little less than the roadbed side slope preventive works cost that with the mortar flag stone is retaining wall; Reasonably a large amount of roadbeds occupations of land will be practiced thrift than coefficient in the roadbed slope; The domatic comprehensive ecology of roadbed meets the social development aim.

Description of drawings

Fig. 1 is the stacked GSZ enhancement mode of a present invention composite earth roadbed elevation;

Fig. 2 is stacked GSZ enhancement mode composite earth roadbed sectional view;

Fig. 3 is a composite earth roadbed side slope guard system structural representation.

Among the figure: 1, GSZ; 2, soil; 3, roadbed; 4, short pin wall; 5, combo box is set a roof beam in place; 6, geotechnological masonry; 7, top layer GSZ.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is further described.

Embodiment 1:

Like Fig. 1, Fig. 2 and shown in Figure 3, stacked GSZ composite earth roadbed be by the GSZ (1) of layer-built cables installation+soil (2) after compacting, repeat again to lay, compacting forms; GSZ after compacting (1) interfloor distance is 20-25cm, is 1.5-2m (the GSZ width is 3.5-4m) with layer spacing of GSZ (1), and its purpose is to reduce the use amount of GSZ, the Control Engineering total cost.

Layering GSZ (1) adopts the mode of staggered floor overlap joint, ensures the stressed harmony of embankment load when its purpose is to reduce material usage.

The length that the GSZ (1) of this stacked GSZ enhancement mode composite earth roadbed gos deep into roadbed (3) is 3.5-4m, and at this moment, the pull-out strength of GSZ (1) is:

S ₁F ₁+S ₂F ₂

S in the formula ₁Be GSZ (1) interval area, F ₁Be the shear strength after soil (2) compacting, S ₂Be the superficial area of GSZ (1), F ₂Be the frictional force of soil (2) with GSZ (1) aspect.

Should expose to roadbed (3) >=5cm when stacked GSZ lays, be used for the formation of roadbed side slope guard system structure.

Roadbed (3) bottom (i.e. the end, slope) is provided with the short pin wall of concrete structure (4) that is strengthened by GSZ (1), its thickness >=20cm, and the setting of this structure is in order to prevent that the end, roadbed slope from attacked by flood.

The short pin wall in the end (4) top, slope utilizes the fixing domatic combo box of GSZ (1) (5) structure of setting a roof beam in place, and this structure light weight high strength, cost performance are high, and system provides reliable guarantee for side slope protection.

Domatic combo box is set a roof beam in place (5) structure void space with closely knit the laying of geotechnological masonry (6), forms the top soil structure with water and soil conservation function; This structural thickness is advisable less than 10cm, sees through grown layer in order to root system of plant and gos deep into roadbed (3), realizes the ecology target that roadbed side slope is steady in a long-term.

Closely knit geotechnological masonry (6) is set after, top layer GSZ (7) is fixed in combo box sets a roof beam in place on (5), form the stressed general layout of slope protection entire system; Use mud to be coated on the safeguard structure laminar surface, treat just to have realized after plant grows up to have the target of the roadbed side slope ecological protection engineering of water and soil conservation function by vegetable seeds (grass, irritate), cementing agent configuration.

Claims

1. stacked GSZ enhancement mode composite earth roadbed is characterized in that: this composite earth roadbed is by GSZ that plays humidification and the soil constitution that plays the base material effect, and GSZ employing staggered floor overlapping mode is range upon range of.

2. composite earth roadbed as claimed in claim 1, it is characterized in that subgrade compaction after, the distance between the two-layer GSZ is 20-25cm, with layer GSZ be spaced apart 1.5-2m, the GSZ width is 3.5-4m.

3. composite earth roadbed as claimed in claim 2, it is characterized in that subgrade compaction after, the distance between the two-layer GSZ is 20cm, with layer GSZ be spaced apart 2m, the GSZ width is 4m.

4. like claim 1,2 or 3 described composite earth roadbeds, it is characterized in that GSZ stretches out the length >=5cm of roadbed side slope.

5. protecting slope ecology structure like each described stacked GSZ enhancement mode composite earth roadbed of claim 1 to 4; It is characterized in that the geotechnological masonry that its structure comprises short pin wall, GSZ, combo box is set a roof beam in place and the soil of geotextiles encapsulation forms; Combo box is set a roof beam in place and is fixed in domatic through the GSZ that stretches out roadbed side slope; The closely knit combo box void space of setting a roof beam in place of being located at of geotechnique's masonry; The top layer GSZ is fixed on combo box sets a roof beam in place; Short pin wall is located at the end, roadbed slope.

6. safeguard structure as claimed in claim 5 is characterized in that, described short pin wall is the GSZ concrete structure.

7. like claim 5 or 6 described safeguard structures, it is characterized in that described short pin wall thickness degree >=20cm.