Drainage system of road earth bed

FIELD: construction.

SUBSTANCE: drainage system includes drainage pipes of higher strength installed with a drainage inclination in an earth bed. Drainage pipes are arranged inside the earth bed body using a method of horizontal directional drilling. End sections of pipes protrude beyond limits of earth bed slopes and are connected to each other in a closed system, the outlet of which is made as capable of connection of compressor equipment. Sections of the drainage pipes arranged in the bed body are made as evenly perforated.

EFFECT: invention makes it possible to improve draining properties of a system and bearing capacity of a road base by increasing a drying zone, realisation of the possibility to regulate drying process, and also reinforcement of an earth bed.

2 dwg

 

The invention relates to the field of road construction and can be used in the reconstruction of roadbed to struggle with the drawdown of the road base and frost heave problem areas of the road without stopping traffic.

A known design for protection of soil pavement from wetlands, including the floor, Foundation, drainage layer, subgrade, single transverse interceptor drain installed in the top of the concave vertical curve, posted on the project line subgrade containing a perforated drainage pipe with releases on the slopes of subgrade and coarse filter material disposed within the drainage layer and below it on the width of the Foundation (RF Patent No. 2305730, F02D 17/20, 2006).

The known system is intended for drainage areas of protracted slopes and concave longitudinal profile. Installation of the known system is performed only in the construction of the roadway and, as a consequence, problems on existing sites cannot be resolved.

Closest to the claimed system is a device to strengthen the slope of the subgrade, including placed in the body of the subgrade cross drainage pipe from a material of high strength, with agenoy intake device in the form of a perforated steel pipe, one end of which is provided with a water intake device, and is located in the saturated zone, and a second end removed from the drain bias on the surface of the slope is rigidly connected to the headstall made in the form of an anchor element (Patent RF №2305730, E02D 17/20, 2006)

The known device is intended to ensure slope stability of the subgrade and is not intended for improving bearing capacity of road Foundation. The known device allows the drainage of the Central narrow water-saturated zone in the ballast prism (water lens) of the subgrade. Each drain pipe is implemented as a separate element engaged in the diversion of water due to self-drain. Regulate the outflow of water is not provided. The system inoperable in the cold season.

The technical challenge is to improve the drainage system properties and bearing capacity of the road base by increasing the drainage area, the implementation of regulatory capacity dehumidification, as well as reinforcement of the subgrade.

The invention consists in that the drainage system of the subgrade of the road, including drainage pipes of high strength, installed with drain bias in the sub grade, according to the invention, the drainage pipes are placed inside the body see Lenogo canvas using the method of horizontal directional drilling, the ends of the tubes protrude from the slope of the subgrade and interconnected in a closed system, the output of which is arranged to connect the compressor equipment, and lots of drainage pipes placed in the body of the fabric, holds uniformly perforated.

Using the method of horizontal directional drilling (HDD) for laying drainage pipes inside the subgrade of the road allows the pipes to be laid across the roadway with a given angle in the profile of the road on existing sites, which greatly increases the carrying capacity of the road base by placing a kind of reinforcing lattice of high-strength pipes in the area of distressed stretch of road. Reinforcing lattice slows down the deposition of the problematic part of the road base or stops it.

Lots of drainage pipes located in the body of the fabric, holds uniformly perforated, allowing the vibrations of the road from passing on her transport to enhance the drying process of the soil.

Removing water from the soil subgrade of the road at different times of the year to maintain optimal humidity must be of different intensity. The inventive design allows to solve this problem, because the drainage system is designed with the ability to connect the comp is estomago equipment, which creates negative pressure in the system, initiating the suction of the liquid from the soil.

The interconnected ends of the drainage pipes create a closed system associated with the compressor (pump) equipment that creates the necessary vacuum and regulate the process of drying on the problematic parts of the road depending on the soil type, temperature, saturation of the soil water and the like, providing the necessary water flow.

The system is installed on the problematic stretch of road base, where he found frost heave and/or subsidence of the road base, the reason for this is water "lens" in the body of the road base.

The invention is illustrated as follows.

Figure 1 shows the placement of the drainage tube of the inventive system in the body of roadbed (cross section. Figure 2 is a view As in figure 1 in longitudinal section.

The road system includes perforated drainage pipe 1, which is placed inside the body of subgrade 2 under the road base 3.

The drainage tube 1 is placed in the following way. Using the installation of horizontal directional drilling (HDD) (not shown) using a drill (not shown) is conducted through pilot drilling subgrade 2 with a given slope.

After withdrawal of the drill from the opposite slope of the subgrade Bur demont the shape, to the rod (not shown) attach the drainage tube 1 and on the reverse during installation HDD is produced by laying the specified pipe 1 into the body of subgrade 2 with a given slopeand.

Step drainage pipe 1, the diameter, the configuration of the perforation, type of ground filters and their presence is determined from the model calculation of drainage systems. The results of the calculations are affected by the type of soil, its porosity and the load acting on the stretch of road.

The ends 4 of the pipe 1 protrude from the slope of the subgrade 2. Connect them together using plumbing fixtures - connecting pipes 5 and fittings 6.

Formed a closed system, which by the drain fitting 7 can be connected compressor equipment 8. Drain fitting 7 come from the other side of the road, which is directed slope of the drainage pipe 1.

The drainage system works as follows.

Water from the soil subgrade drains to the drainage pipe 1 and by gravity merge through a drain fitting 7. The water flow increases from the vibration of the ground during movement of vehicles on road base 3.

If necessary, increase the intensity of dehumidification, connects the compressor equipment 8 (compressor) to the drain fitting 7. The compressor 8 creates a vacuum of 0.1-0.9 ATM, depending on the soil type is sidenote ground water, etc., providing the required water flow.

Drainage of the subgrade of the road, including drainage pipes of high strength, installed with drain bias earthen canvas, characterized in that the drainage pipes are placed inside the body of the subgrade using the method of horizontal directional drilling, the ends of the tubes protrude from the slope of the subgrade and interconnected in a closed system, the output of which is arranged to connect the compressor equipment, and lots of drainage pipes placed in the body of the fabric, holds uniformly perforated.



 

Same patents:

FIELD: construction.

SUBSTANCE: drainage system comprises k experimental drainage systems - versions of R replication with n number of experimental drains, connected with a closed header k-R, made of pipes with water impermeable walls without joints and water receiving holes and entering an inspection drop hydrometric manhole. M number of parallel pipes of closed headers enter the inspection drop hydrometric manhole at the same time and are made with a section with entering drains and an idle part. As the experimental drainage system version is moved away from the inspection drop hydrometric manhole, the idle part of the closed header of the previous experimental drainage system-version is shorter than the idle part of the closed header of each subsequent experimental drainage system version. Pipes of closed headers entering the inspection drop hydrometric manhole are equipped with a cantilever water outlet and are laid in one trench in tiers in different parallel vertical planes.

EFFECT: invention makes it possible to improve conditions for mechanisation of field works, to perform reconstruction and repair of each header and its drains, without interfering with other headers, to reduce number of weed seed pilots.

4 dwg

FIELD: construction.

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2 dwg

FIELD: construction.

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FIELD: construction.

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3 dwg

FIELD: construction.

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3 dwg

FIELD: construction.

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FIELD: construction.

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FIELD: construction.

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FIELD: construction.

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4 dwg

FIELD: construction.

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4 cl

FIELD: building.

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4 cl, 5 dwg

FIELD: construction.

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1 cl

Road structure // 2368720

FIELD: construction.

SUBSTANCE: invention is related to structures for protection of road carpet soil foundations against overwetting. Road structure including coat, foundation, draining layer, earth bed, lean-to cross catching drain installed on concave section of vertical curve, top of which is located on project line of earth bed, comprising perforated drain tube with tubular extensions to slopes of earth bed, and filtering coarse-grain material installed within the limits of draining layer and below by foundation width. Interruption of filtered water is done by arrangement of catching drains at borders of sections with slopes, which provide for efficient drying of draining layer on top sides, and distance from curve top to borders of sections is defined by product of curve radiuses to border slopes.

EFFECT: preservation of stable strength in period of structure thawing in sections of concave vertical curve, top of which is located on project line of longitudinal profile of road, and sections are limited by opposite slopes of at least two ppm, and also prevention of water supply to concave section, and therefore, provision of stable strength of structure.

3 dwg

Road structure // 2368719

FIELD: construction.

SUBSTANCE: road structure including coat, foundation, draining layer, earth bed, lean-to cross catching drain arranged in top of concave vertical curve installed on project line of earth bed, comprising perforated drain pipe with extensions to slopes of earth bed and filtering coarse-grained material installed within the limits of draining layer and below by foundation width. Draining layer used in drying section is material with filtration coefficient that exceeds value of material filtration coefficient at approaches to this section, preferably at least 10 m/day, and distance from top of curve to borders of efficient drying sections is determined by product of curve radiuses by border slopes.

EFFECT: efficient drying of draining layer in road carpet in period of structure thawing in concave sections of longitudinal profile with zero inclination in top of curve on project line of earth bed and limited by opposite slopes of at least two ppm, and also higher efficiency of drying and prevention against deformations and damages of earth bed and road carpet.

3 dwg

FIELD: construction.

SUBSTANCE: embankment on frozen soil includes base with placed thereon technological layers of soil, divided by width with soil longitudinal lines. According to the invention, in the base of the embankment there are cross slots filled up with frost-free material. Top of the base is covered with waterproofing material, with placed thereon heat insulation layer in the shape of non-isosceles triangle with the corner offset towards the lateral side of the embankment in the direction of solar radiation; heat insulating layer is covered with waterproof casing with arranged there at the width of the embankment longitudinal soil lines, whereat along the lateral slopes of the internal soil line there are placed filtrating cloths meeting with lower part of waterproof casing and separating it from lateral soil longitudinal lines.

EFFECT: prevention of water saturation and soil fluidisation at ice thawing, during its operation, securing enhanced strength of earth bed due to reinforcement of its separate zones.

6 cl, 2 dwg

FIELD: construction.

SUBSTANCE: invention deals with preparation for construction activities within unstable ground sites. Method of construction under unstable ground conditions includes the following operations: placement of reinforcing material onto the construction site ground with the material selected from the following list: rope, gasket, reinforcement net, meshed material, geotextile material and the reinforcing elements arranged lengthwise or netlike; pouring a liquid dual-component hydrophobic expanding polymer onto the reinforcing material. After curing the polymer and the reinforcing material form a consolidated constructional foundation spanning over the ground unstable zones. There is also description of the construction method variant as well as a structure built through it.

EFFECT: arrangement of a reinforced foamed material foundation enabling the earth foundation consolidation and minimisation of its disintegration which eventually results in decreased settling of buildings and structures erected on such reinforced foamed material foundations.

17 cl, 3 dwg

FIELD: road building, particularly to construct road pavement.

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EFFECT: reduced water impermeability and increased wear resistance and bending strength; possibility to use pavement without rigid base construction.

1 dwg

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