CN216838791U - Roadbed and pavement structure located on pipeline facing dike - Google Patents

Roadbed and pavement structure located on pipeline facing dike Download PDF

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CN216838791U
CN216838791U CN202123235817.1U CN202123235817U CN216838791U CN 216838791 U CN216838791 U CN 216838791U CN 202123235817 U CN202123235817 U CN 202123235817U CN 216838791 U CN216838791 U CN 216838791U
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pipeline
layer
dyke
pile
roadbed
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尹祖超
丁永富
李亮
谢亦红
高红艳
梁晓龙
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Changjiang Institute of Survey Planning Design and Research Co Ltd
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Changjiang Institute of Survey Planning Design and Research Co Ltd
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Abstract

The utility model discloses a be located and face road bed road surface structure on dyke pipeline. The foundation comprises a surface layer, a base layer, a graded broken stone subbase layer, a composite geomembrane and a roadbed filling layer which are positioned above a pipeline adjacent to a dike from top to bottom; the surface course is located the surface of road, the basic unit lay in the surface course below, the rubble subbase is laid to the graduation the basic unit below, the roadbed filled soil layer pave in the rubble subbase below of graduation, the roadbed filled soil layer is located original state soil layer top, the basic unit with lay compound geomembrane between the rubble subbase of graduation. The utility model discloses adopt non-excavation reinforcement measure to current pipeline, adopt soil cement mixing pile to face the dyke region and consolidate, avoid excavating the dyke foot, improve and face dyke pipeline region ground intensity and dyke prevention of seepage ability.

Description

Roadbed and pavement structure located on dike facing pipeline
Technical Field
The utility model belongs to the technical field of road engineering, concretely relates to be located face roadbed pavement structure on dyke pipeline.
Background
The situation that a proposed road and an adjacent dike pipeline are parallel is inevitably met in the construction process of the coastal river roads, and as newly added filling soil and road running load working conditions are not considered in the design process of most of the adjacent dike pipelines under the current situation, the pipelines are likely to shift under the action of additional load in the road construction and later operation processes, so that the adjacent dike pipeline is damaged, and the normal use of the pipelines is influenced. The pipe excavation maintenance may change the dike seepage conditions and affect the dike stability.
The stress condition of the embankment pipeline positioned on the roadside is very complex, the reinforcement design of the pipeline is lack of a mature theoretical system at present, the pipeline reinforcement is mostly based on experience, the pipeline is often too conservative in design and uneconomic in the implementation process, or the embankment pipeline is damaged in the construction and road operation stages due to improper treatment, so that the normal use is influenced, the operation and maintenance cost is increased, and the like.
In the design specifications of roadbed and pavement in China (including road asphalt pavement design Specifications (JTG D50-2006), road cement concrete pavement design Specifications (JTG D40-2011) and pipeline structure design Specifications (including Water supply and drainage engineering pipeline structure design Specifications (GB 50332-2002)), special treatment of roadbed and pavement structures above buried pipelines is definitely specified. In related researches, pipeline reinforcing treatment measures generally focus on excavating a newly-built force transmission plate, replacing and filling light soil and the like, and the measures have large interference on the current pipeline and high construction difficulty and are limited by the soil covering height of a pipe top and the distance between adjacent dikes.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is exactly not enough in order to solve above-mentioned background art existence, consider to face the limitation that dyke pipeline reinforcement and adjacent road roadbed pavement structure treatment exist at present, the utility model discloses a comprehensive consideration currently faces the equivalent load effect of dyke pipeline around the road is built, provides one kind and is located the roadbed pavement structure who faces on the dyke pipeline. Non-excavation reinforcement measures are adopted for the existing pipelines, the probability of damage to the pipelines facing the embankment and roadbed and pavement diseases is reduced, the service life of the road is prolonged, the construction cost is reduced, and the construction difficulty is reduced.
The utility model adopts the technical proposal that: a roadbed pavement structure positioned on a pipeline adjacent to a dike comprises a surface layer, a base layer, a graded broken stone subbase layer, a composite geomembrane and a roadbed filling layer which are positioned above the pipeline adjacent to the dike from top to bottom; the surface course is located the surface of road, the basic unit lay in the surface course below, the rubble subbase is laid to the graduation the basic unit below, the roadbed filled soil layer pave in the rubble subbase below of graduation, the roadbed filled soil layer is located original state soil layer top, the basic unit with lay compound geomembrane between the rubble subbase of graduation.
In a further preferable structure, the graded broken stone base layer is used as a drainage channel inside a dike and a coastal river road, and the thickness is not less than 20 cm; the thickness of the composite geotechnical film is not less than 0.5 mm.
In a further preferable structure, the roadbed filling layer is an area between the lower part of the composite geomembrane and a ground line, is backfilled by sand gravel in an area Z adjacent to the cement concrete butt strap, and has a compaction degree not less than 96%.
Further preferred structure still includes faces dyke pipeline protection structure, face dyke pipeline protection structure and include cement concrete attachment strap more than the ground line, pile cap and lie in the cement mixing pile in the below-ground-line original state soil layer, cement mixing pile along facing dyke pipeline axis left and right sides staggered arrangement, the pile cap is located cement mixing pile top, the pile cap is located the cement concrete attachment strap who waters after.
In a further preferable structure, a layer of steel-plastic grating is arranged in the cement concrete attachment strap, and the steel-plastic grating is positioned on the top surface of the pile cap.
In a further preferable structure, the pile diameter r of the cement-soil mixing pile is 50cm, and the 28-day strength is not less than 1.0 MPa.
Further preferred structure, soil cement mixing pile and face dyke pipeline lateral wall net distance d and be for facing dyke pipeline diameter, and be not less than 1.0m, stake interval S is 80-120 cm, soil cement mixing pile stake length is L:
Figure DEST_PATH_GDA0003629482360000031
where r represents the cross-sectional radius of the pile, unit: cm; ePRepresenting the elastic compression modulus of the pile; eSThe compressive modulus of the soil on the pile side is shown.
In a further preferable structure, the pile cap is cast by C25 cement concrete, and the side length D of the square section of the pile cap is not less than 150 cm.
In a further preferable structure, the cement concrete floor slab is formed by post-pouring C20 cement concrete, the thickness of the cement concrete floor slab is 20-40 cm, and the width B is 80+ D + 3D.
The utility model has the advantages that:
the equivalent load effect of the existing dike-facing pipeline before and after the road is built is comprehensively considered, non-excavation reinforcing measures are adopted for the existing pipeline, the dike-facing area is reinforced by adopting the cement soil mixing piles, the dike foot excavation is avoided, and the foundation strength and the dike seepage-proofing capacity of the dike-facing pipeline area are improved.
Compare in the new-built dowel steel of excavation, trade and fill light soil, pipeline and seal measures such as concrete reinforcement, the utility model discloses use the undisturbed current dyke pipeline that faces as the principle, reduce the pipeline top road bed road surface construction degree of difficulty, shorten construction cycle, make the filling quality easily guarantee, and then reduce and face the probability that dyke pipeline damaged and road bed road surface disease, improve the road and face dyke pipeline life.
Drawings
FIG. 1 is a cross-sectional view of a subgrade pavement structure adjacent a dike conduit;
FIG. 2 is an enlarged view of the pipe protection structure adjacent to the dike;
FIG. 3 is a plan view of a subgrade pavement structure adjacent a dike conduit;
fig. 4 is a partially enlarged view of fig. 1.
In the figure, 1-surface course, 2-base course, 3-graded broken stone subbase course, 4-composite geomembrane, 5-roadbed filling layer, 6-undisturbed soil layer, 7-dyke pipeline, 8-cement soil mixing pile, 9-pile cap, 10-cement concrete butt strap, 11-steel-plastic grating, 12-dyke and 13-ground line.
Detailed Description
The invention will be further described in detail with reference to the drawings and the following detailed description, which are provided for the purpose of clearly understanding the invention and are not intended to limit the invention.
As shown in fig. 1-4, the utility model comprises a surface layer 1, a base layer 2, a graded broken stone subbase layer 3, a composite geomembrane 4 and a roadbed filling layer 5 which are positioned above a pipeline 7 facing a dike from top to bottom; surface course 1 is located the surface of road, basic unit 2 lay in 1 below of surface course, graded rubble subbase 3 lay in 2 below of basic unit, subgrade filled soil layer 5 lay in 3 below of graded rubble subbase, subgrade filled soil layer 5 is located original state soil layer 6 tops, basic unit 2 with lay compound geomembrane 4 between the graded rubble subbase 3.
The graded broken stone base layer 3 is used as a dike 12 and a drainage channel inside a coastal river road, and the thickness is not less than 20 cm; the thickness of the composite geomembrane 4 is not less than 0.5 mm.
The roadbed filling layer 5 is an area between the lower part of the composite geomembrane 4 and a ground line 13, the roadbed filling layer 5 is backfilled by sand gravel in an area Z range adjacent to the cement concrete butt strap 10, and the compaction degree is not less than 96%.
Still including facing dyke pipeline protection structure, face dyke pipeline protection structure and include cement concrete access board 10 more than ground line 13, pile cap 9 and lie in the cement mixing pile 8 in the undisturbed soil layer 6 below ground line 13, cement mixing pile 8 is along facing dyke pipeline 7 axis and controlling the dislocation set, pile cap 9 is located 8 tops of cement mixing pile, pile cap 9 is located the cement concrete access board 10 of later-poured.
A layer of steel-plastic grating 11 is arranged in the cement concrete attachment strap 10, and the steel-plastic grating 11 is located on the top surface of the pile cap 9.
The pile diameter r of the cement soil mixing pile 8 is 50cm, and the 28-day strength is not less than 1.0 MPa.
Soil cement mixing pile 8 and face dyke pipeline 7 lateral wall net distance d for facing dyke pipeline diameter, and be not less than 1.0m, stake interval S is 80-120 cm, preferred, 110cm, soil cement mixing pile 8 stake length is L:
Figure DEST_PATH_GDA0003629482360000041
where r represents the cross-sectional radius of the pile, unit: cm; ePRepresenting the elastic compression modulus of the pile; eSThe compressive modulus of the soil on the pile side is shown.
The pile cap 9 is poured by C25 cement concrete, and the side length D of the square section of the pile cap is not less than 150 cm.
The cement concrete floor slab 10 is made of C20 cement concrete and is subjected to post-pouring, the thickness is 20-40 cm, preferably 25cm, and the width B is 80+ D + 3D.
The utility model discloses a construction method, including following step:
the first step is as follows: positioning the pipe 7 adjacent to the dike and arranging a mark on the cement soil mixing pile 8;
the second step is that: performing construction on the ground surface and the cement soil mixing pile 8 at the current situation;
the third step: pouring the pile cap 9 on the pile top of the cement-soil mixing pile 8;
the fourth step: after a cement concrete attachment strap 10 is poured around the pile cap 9 to the top elevation of the pile cap 9, the steel-plastic grating 11 is paved on the top surface of a pouring layer;
the fifth step: when the concrete strength of the cement concrete butt strap 10 reaches 75% of the design strength, paving a road foundation filling layer 5 on the cement concrete butt strap 10, and rolling and compacting;
and a sixth step: and the composite geomembrane 4, the graded broken stone subbase 3, the base layer 2 and the surface layer 1 are sequentially paved on the roadbed filling layer 5.
Those not described in detail in this specification are within the skill of the art.

Claims (8)

1. The utility model provides a be located and face road bed road surface structure on dyke pipeline which characterized in that: comprises a surface layer (1), a base layer (2), a graded broken stone subbase layer (3), a composite geomembrane (4) and a roadbed filling layer (5) which are positioned above an adjacent dike pipeline (7) from top to bottom; the pavement (1) is positioned on the surface of a road, the base layer (2) is laid below the pavement (1), the graded broken stone subbase (3) is laid below the base layer (2), the roadbed filling layer (5) is laid below the graded broken stone subbase (3), the roadbed filling layer (5) is positioned above an original state soil layer (6), and a composite geomembrane (4) is laid between the base layer (2) and the graded broken stone subbase (3); still including facing dyke pipeline protection structure, face dyke pipeline protection structure and include cement concrete attachment strap (10) more than ground line (13), pile cap (9) and lie in cement soil mixing pile (8) in original state soil layer (6) below ground line (13), dislocation arrangement about facing dyke pipeline (7) axis is followed in cement soil mixing pile (8), pile cap (9) are located cement soil mixing pile (8) top, pile cap (9) are located cement concrete attachment strap (10) of watering after.
2. A roadbed pavement structure located on the pipe adjacent to the dike according to claim 1, wherein: the graded broken stone base layer (3) is used as a dike (12) and a drainage channel inside a coastal river road, and the thickness is not less than 20 cm; the thickness of the composite geomembrane (4) is not less than 0.5 mm.
3. A roadbed pavement structure located on the pipe adjacent to the dike according to claim 1, wherein: the roadbed filling layer (5) is an area between the lower part of the composite geomembrane (4) and a ground line (13), the roadbed filling layer (5) is backfilled by sand gravel in a Z range of a region adjacent to the cement concrete butt strap (10), and the compaction degree is not less than 96%.
4. A roadbed pavement structure located on the pipe adjacent to the dike according to claim 1, wherein: a layer of steel-plastic grating (11) is arranged in the cement concrete attachment strap (10), and the steel-plastic grating (11) is located on the top surface of the pile cap (9).
5. A roadbed pavement structure located on the pipe adjacent to the dike according to claim 1, wherein: the pile diameter r of the cement soil mixing pile (8) is 50cm, and the 28-day strength is not less than 1.0 MPa.
6. A roadbed pavement structure located on the pipe adjacent to the dike according to claim 1, wherein: soil cement mixing pile (8) and face dyke pipeline (7) lateral wall net distance d for facing dyke pipeline diameter, and be not less than 1.0m, stake interval S is 80-120 cm, soil cement mixing pile (8) stake length is L:
Figure DEST_PATH_FDA0003629482350000021
where r represents the cross-sectional radius of the pile, unit: cm; ePRepresenting the elastic compression modulus of the pile; eSThe compressive modulus of the soil on the pile side is shown.
7. A roadbed pavement structure located on the pipe adjacent to the dike according to claim 1, wherein: the pile cap (9) is poured by C25 cement concrete, and the side length D of the square section of the pile cap is not less than 150 cm.
8. A roadbed pavement structure located on the pipe adjacent to the dike according to claim 1, wherein: the cement concrete butt strap (10) is formed by post-pouring C20 cement concrete, the thickness is 20-40 cm, and the width B is 80+ D + 3D.
CN202123235817.1U 2021-12-21 2021-12-21 Roadbed and pavement structure located on pipeline facing dike Active CN216838791U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202123235817.1U CN216838791U (en) 2021-12-21 2021-12-21 Roadbed and pavement structure located on pipeline facing dike

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202123235817.1U CN216838791U (en) 2021-12-21 2021-12-21 Roadbed and pavement structure located on pipeline facing dike

Publications (1)

Publication Number Publication Date
CN216838791U true CN216838791U (en) 2022-06-28

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