CN212128696U - Road bridge links up mixed light dirt road bed structure of section bubble - Google Patents
Road bridge links up mixed light dirt road bed structure of section bubble Download PDFInfo
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- CN212128696U CN212128696U CN202020432319.2U CN202020432319U CN212128696U CN 212128696 U CN212128696 U CN 212128696U CN 202020432319 U CN202020432319 U CN 202020432319U CN 212128696 U CN212128696 U CN 212128696U
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Abstract
The utility model provides a road bridge links up section bubble mixture light dirt road bed structure, mix light dirt road bed, prefabricated panel base, prefabricated panel braced system and comprehensive drainage system including road surface structural layer and bubble. This bubble mixes light dirt road bed structure because of its light, self-reliance, specialties such as construction convenience, can replace urban road bridge linking section cantilever type retaining wall, can solve the subgrade settlement too big, the not enough problem of high fill-out highway section subgrade stability, the not enough problem of high retaining wall ground bearing capacity, improves the travelling comfort of road operation phase driving simultaneously, and effective control post-construction settlement volume guarantees the durability of subgrade road surface structure, has great popularization and application and worth.
Description
Technical Field
The utility model relates to a road surface technical field, concretely relates to road bridge links up section bubble mixture light dirt road bed structure.
Background
The urban road bridge connection section is often construction site limited, and it is big to guarantee to lead to pressure, and construction period requires highly, and the total settlement volume is greater than the total settlement volume of bridge behind the platform filled earth because the worker, and this kind of settlement difference can form the discrepancy in elevation in road bridge connection department, produces the bridgehead phenomenon of jumping, not only reduces driving comfort, and serious person influences driving safety. Under the condition of meeting the allowable post-construction settlement, in order to reduce the settlement difference of roads and bridges, a gravity retaining wall is often adopted for a bridge head subgrade according to specific conditions, and a preloading method, a dynamic compaction method, a cement mixing pile method and the like are assisted for treatment. The traditional treatment method has various advantages and disadvantages, or the construction period is long, or the cost is high, or the influence on the environment is large.
At present, gravel soil or gravel soil and the like used as a material for back filling or retaining wall filling have the characteristics of good water permeability, high strength, strong stability and the like, but due to the large self weight, large machinery is difficult to enter a site during back filling construction, so that the large machinery is difficult to compact. From the aspect of engineering feasibility, the characteristics of light weight, high strength, dense filling and the like of the backfill material are used as important measures for treating the road and bridge transition section.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a road bridge links up section bubble mixture light dirt road bed structure, this road surface structure has following advantage: the vertical filling can be realized, the land resource is saved, and the removal of buildings is avoided or reduced; the differential settlement of new and old road beds and the additional settlement of nearby buildings can be effectively reduced, the piping pumping construction is adopted, the construction occupied space is small, the existing traffic is hardly influenced, the construction is convenient, and the construction period is short.
The utility model adopts the technical proposal that:
a road and bridge connection section bubble mixed light soil embankment structure comprises a road surface structure, a tailing sand doped bubble mixed light soil subgrade, a prefabricated panel base, a prefabricated panel supporting and fixing system and a comprehensive waterproof and drainage system;
the pavement structure layer comprises a surface layer and a base layer from top to bottom, wherein the surface layer is made of asphalt concrete, and the base layer is made of cement stabilized macadam;
the tailing sand-doped bubble mixed lightweight soil roadbed is positioned below the pavement structure layer, and reinforcing steel bar meshes are laid at the base part and the top part of the tailing sand-doped bubble mixed lightweight soil roadbed;
the prefabricated panel base adopts a concrete prefabricated base with a reserved U-shaped cup mouth;
pre-embedding steel bars in the prefabricated panel, fixing the prefabricated panel and the prefabricated panel base by adopting split bolts, and recharging cement mortar in a reserved U-shaped cup opening gap to form an assembled protective panel structure;
the prefabricated panel supporting and fixing system adopts angle steel or channel steel struts and adopts a phi 6 pull rod to be welded and fixed with prefabricated panel embedded steel bars into a whole;
the comprehensive water-proof and drainage system comprises an impermeable geotextile between a surface layer structure and the bubble concrete, a graded broken stone blind ditch at the joint of the geotextile and a road filling foundation, and a MY10 plastic blind pipe interconnection system with a distance of 5 m.
Due to the adoption of the technical scheme, the utility model discloses following advantage has:
the road bridge links up section bubble mixture light dirt road bed mechanism and can solve the problem that the road bed subsides too big, the road bed stability of high fill-out highway section is not enough, high retaining wall foundation bearing capacity is not enough, improves the travelling comfort of road operation phase driving simultaneously, and effective control post-construction settlement volume guarantees the durability of road bed road surface structure, has great popularization and application and worth.
a) The method has the advantages of vertical filling, convenient construction, realization of unidirectional road construction, no influence on traffic passage in the construction process, shortening of construction period, convenient completion of road expansion, wide popularization and capability of greatly improving the construction efficiency of infrastructure in China.
b) The slope is not required to be set, the roadbed soil taking is reduced, the occupied area is reduced, the natural environment is prevented from being damaged and exploited, the farmland restoration is facilitated, land acquisition and removal and pipeline migration are avoided, and the precious land resources are saved.
c) The load can be greatly reduced, the processing intensity of an expanded roadbed is reduced, the difficult problems of differential settlement of new and old embankments, bumping at bridge heads and the like are effectively solved, the road engineering quality and the service level are fundamentally improved, the road driving comfort is effectively improved, and the highway operation and maintenance cost is reduced.
d) The novel foam light material with practicability, economy and environmental protection is innovatively used, the cement consumption can be greatly reduced, the national call is responded, waste resources are utilized nearby, a large amount of waste materials such as coal ash and tailings are consumed, waste materials are changed into valuable materials, the resource recycling is promoted, and the assistance green environmental protection demonstration project is achieved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
a schematic view of a protective prefabricated panel as shown in fig. 2;
in the figure, 1, a pavement structure layer, 2, impermeable geotextile, 3, a bubble mixed light soil roadbed, 4, a prefabricated panel, 5, a prefabricated foundation, 6, a plastic blind pipe, 7, a macadam blind ditch, 8, a phi 6 pull rod, 9, an angle steel upright post, 10 and cement mortar.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the following embodiments.
The utility model aims at realizing a road bridge links up section bubble mixture light dirt road bed structure through such technical scheme, including road surface structure, mix the bubble mixture light dirt road bed and prefabricated panel base, prefabricated panel system, the comprehensive drainage system of consolidating of tailing sand.
The pavement structure layer comprises a surface layer and a base layer from top to bottom, wherein the surface layer is made of 12-18 cm asphalt concrete, and the base layer is made of 32-28 cm cement stabilized macadam.
The tailing sand doped bubble mixed light soil roadbed is positioned below a pavement structure layer and adopts cement: water: bubble group: fly ash: tailing sand is 1: 0.55-0.70: 2.3-3.0: 0.17-0.25: 0.05-0.10, fully mixing by full-automatic mixing equipment, pumping and pouring for molding; and reinforcing mesh sheets with the diameter of 3.2-100mm multiplied by 100mm are laid at stress concentration positions such as the base part and the top part of the bubble mixed lightweight soil road.
The prefabricated panel base adopts a C30 concrete prefabricated base with a reserved U-shaped cup opening, and the groove of the U-shaped cup opening is 8cm deep and 5cm wide.
The prefabricated panel is prefabricated and formed by C20 fine stone concrete, the size of the standard panel is 90cm multiplied by 30cm multiplied by 4cm, phi 4 embedded steel bars are embedded in specific positions, the prefabricated panel and the prefabricated base are fixed by split bolts, cement mortar is reinjected in a reserved U-shaped cup opening gap, and the assembled protective panel structure is formed.
The prefabricated panel supporting and fixing system adopts angle steel or channel steel struts, the size of the angle steel or channel steel struts is 70mm multiplied by 6mm, and phi 6 pull rods and prefabricated panel embedded steel bars are welded and fixed into a whole.
The comprehensive water-proof and drainage system comprises an impermeable geotextile between a surface layer structure and the bubble concrete, a graded broken stone blind ditch at the joint of the geotextile and a road bed filling, and an MY10 plastic blind pipe interconnection system with the interval of 5m, and finally water is guided and drained out of the roadbed structure.
As shown in figure 1, the pavement structure layer 1 is positioned on the bubble mixed light soil 3, the anti-seepage geotextile 2 is laid between the two layers, the top surface of the bubble mixed light soil is wrapped by the anti-seepage geomembrane, the thickness is 2mm, the elongation is more than 50%, the longitudinal and transverse tensile strength is not less than 18kN/m, the longitudinal and transverse right-angle tear strength is not less than 100N/mm, the CBR bursting strength is not less than 6000N, and the vertical permeability coefficient is not more than 5 multiplied by 10-11cm/s。
The air bubble mixed light soil 3 adopts cement: water: bubble group: fly ash: tailing sand is 1: 0.67: 2.34: 0.23: 0.10, fully mixing by full-automatic mixing equipment, pumping and pouring for molding; and reinforcing mesh sheets with the diameter of 3.2-100mm multiplied by 100mm are laid at stress concentration positions such as the base part and the top part of the bubble mixed lightweight soil road.
Through MY10 plastic blind pipes 6 with the interval of 5m, the three layers are collected to the outer side of the roadbed through a two-way pipe and a three-way pipe in a layered modeForming a comprehensive drainage system, wherein the rigidity requirement of the plastic blind pipe is more than 8KN/m2。
As shown in figure 2, the protective prefabricated panel 4 is arranged on the outer side of the bubble mixed light soil 3, is arranged in a reserved U-shaped cup opening of the prefabricated foundation 5, is fixed through cement mortar 10, is fixedly connected with an angle steel upright post 9 through a phi 6 pull rod 8 through embedded steel bars, and is installed through cement mortar 10 staggered joints.
The foundation has the advantages of good self-supporting performance, land occupation saving, removal reduction, capability of forming a whole after filling, good shock resistance, no lateral pressure, small load to the foundation and the like, thoroughly eliminates the post-construction settlement of the abutment embankment filler, avoids the severe bumping at the bridge head, and has obvious technical advantages.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The utility model provides a road bridge links up section bubble mixture light dirt road bed structure which characterized in that: the system comprises a pavement structure, a tailing sand-doped bubble mixed light soil roadbed, a prefabricated panel base, a prefabricated panel supporting and fixing system and a comprehensive waterproof and drainage system;
the pavement structure comprises a surface layer and a base layer from top to bottom, wherein the surface layer is made of asphalt concrete, and the base layer is made of cement stabilized macadam;
the tailing sand-doped bubble mixed lightweight soil roadbed is positioned below the pavement structure layer, and reinforcing steel bar meshes are laid at the base part and the top part of the tailing sand-doped bubble mixed lightweight soil roadbed;
the prefabricated panel base adopts a concrete prefabricated base with a reserved U-shaped cup mouth;
pre-embedding steel bars in the prefabricated panel, fixing the prefabricated panel and the prefabricated panel base by adopting split bolts, and recharging cement mortar in a reserved U-shaped cup opening gap to form an assembled protective panel structure;
the prefabricated panel supporting and fixing system adopts angle steel or channel steel struts and adopts a phi 6 pull rod to be welded and fixed with prefabricated panel embedded steel bars into a whole;
the comprehensive water-proof and drainage system comprises an anti-seepage geotextile between a surface layer and a light soil subgrade mixed with tailing sand bubbles, a graded broken stone blind ditch at the joint of the geotextile and a filler soil subgrade, and a plastic blind pipe interconnection system with the distance of MY10 being 5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020432319.2U CN212128696U (en) | 2020-03-30 | 2020-03-30 | Road bridge links up mixed light dirt road bed structure of section bubble |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020432319.2U CN212128696U (en) | 2020-03-30 | 2020-03-30 | Road bridge links up mixed light dirt road bed structure of section bubble |
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| CN212128696U true CN212128696U (en) | 2020-12-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075076A (en) * | 2022-07-20 | 2022-09-20 | 中交第二公路勘察设计研究院有限公司 | High-fill less-soil composite roadbed structure and construction method |
-
2020
- 2020-03-30 CN CN202020432319.2U patent/CN212128696U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075076A (en) * | 2022-07-20 | 2022-09-20 | 中交第二公路勘察设计研究院有限公司 | High-fill less-soil composite roadbed structure and construction method |
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