Earthen building on a weak foundation
The invention relates to the field of construction and can be used in the construction and reconstruction of linear structures on weak, including permafrost 3rd and 4th categories thermoperiodocity, noncontributing areas, and marshes of the 2nd and 3rd types. Earthen building on a weak Foundation includes the body of the mound of alternating layers of bulk soil and panels of flexible synthetic non-woven material (SNM), arranged in the longitudinal direction over the whole length of the plot with a weak base and in the cross - width of the roadway. What's new is that it is equipped with rods, connected by an anchor with two sides of the weak base in solid ground and having on the upper parts of the rollers, and the cloth SNM is made in the form of a closed ribbon and placed on the project mark paintings of the mound, with a closed ribbon stretched between the upper parts of each are connected by an anchor with two sides of the weak base in solid ground rods and the inner space of the tape is filled with drainage material. The technical result of the invention consists in the development of earth structures, the stability of which is provided by removing a residue of the weak base under the influence of concentrated loads is ravlenija and transfer the load from the site with a weak Foundation on the solid ground. 2 C.p. f-crystals, 1 Il. The invention relates to the field of construction and can be used in the construction and reconstruction of linear structures on weak, including permafrost 3rd and 4th categories thermoperiodocity, noncontributing areas and swamps of the 2nd and 3rd types (Railways, roads, pipelines, dams, and dikes).Almost 10% of road structures are constructed and operated on a weak Foundation.The main reason for the loss of carrying capacity of structures under these conditions is associated with the deformations that occur in the thixotropic decompression and extrusion-plastic soils saturated grounds (peat, loess, silt and so on). Deformations occur under the influence of the rolling load and the weight of the barrows themselves are linear structures both in the transverse and longitudinal directions.With the growth of gruzoperevozki dynamic vibration impacts from the rolling load increases, respectively, increase thixotropic phenomena in soils, and the necessary increase in regulatory design parameters of structures causes an additional extrusion razuplotneniya fluid soils and, soomali as sediment continues throughout the life of the object.It is well known that the stability of earth structures is provided by reclamation (drainage) soil base. But draining soil base within closed areas is almost impossible, so one of the ways to remove such sediment soil Foundation is a device reinforcing structures.Known earthen building on a weak Foundation /1/. Earthen construction contains in the upper part of the mound, and the lower armature. Valves made in the form of ropes and placed in the active area of the base of the mound transverse tiers. While ropes laid bulge upward. At the ends of ropes anchored bulk items.The advantage of this design is to reduce extrusion forces in the period of consolidation of the active thickness of the base and, accordingly, preventing Vipera weak mass of soil. It the reaction of the valve in an upright position and compensate for the load on the Foundation. The result is reduced extrusion force (the weight of the embankment and payload) on low plastic soils of the basis, and, accordingly, reduced sludge, and, consequently, slows down the sediment structure.The disadvantage of this construction aveage in the longitudinal direction are related to the heterogeneity of the weak base along the length of the plot. This leads to the fact that the reaction resistance from the valve along the entire length not distributed evenly. The uneven distribution of reactions leads to the emergence and development of the sediment in the longitudinal direction. Deformation structures in the cross section associated with a form of reinforcement of the Foundation in the form of an arch. With this reinforcement of the Central part of the structure and slope of the area perceive the load is not evenly. This is due to the fact that the convex part is the maximum resistance of the valve from the load, and the edges - decreasing. All this makes it difficult to ensure the stability of sloping areas and negatively affect the integrity of the structure during its operation. The durability of such structures is not more than 10 years.Thus, the known design does not provide uniform load distribution and, accordingly, the complete elimination of the precipitation on the length of construction, and in cross-section, but only irregularly reduces it.The closest in technical essence and the achieved result is an earthen structure on a weak basis, including the body of the mound of alternating layers of bulk soil and panels of flexible synthetic non-woven material (SNM). Polota CNM filled with soil and form resistant prism in the longitudinal direction on both sides of the embankment /2/. Cloth CNM feel the tension from the weight of the bulk soil and the movable load R. this persistent prism hinder the movement of panels SNM and contribute to their tension. Tension CNM allows to distribute the concentrated load on the cross section of structures and, accordingly, to reduce it in the middle section.The advantage of this design is that the thrust of the prism in the slopes of the bulk structures reduce the draught in the transverse direction and thereby protect the body of the mound from deformation. This is due to the fact that through hard prisms paintings SNM are always in tension, which allows to reduce the concentrated load from R. Reduction of a concentrated load in the transverse direction leads to a decrease in precipitation of the body of the embankment cross-sections. These advantages are manifested only in the body of the embankment.The disadvantage of this design is that the base, which is itself reinforced embankment remains weak. This is due to the fact that the reaction resistance F in the axial prisms only reduce the pressure and, consequently, reduce deformation (precipitation) of the Foundation in the center of the mound, make them evenly distributed along the cross is Lee in the longitudinal direction. This is because in the longitudinal direction of the structure is weak, non-uniform base, which has a different resistance to a variety of soils to loads. Insulated panels SNM provide enough retention efforts in the transverse direction, and only partly in longitudinal. The presence of weak retention efforts in the longitudinal direction causes differential settlement and violates the integrity of the structure. The durability of this design is also not more than 10 years.Thus, the known device eliminates the possibility of complete elimination of rainfall. The lack of integrity leads to uneven load distribution in the longitudinal direction and precipitation in both longitudinal and transverse directions, which violates the stability of the structures over time.The basis of the invention is to develop an earthen structure, the stability of which is provided by removing a residue of the weak base under the influence of concentrated loads during operation due to their redistribution in the body of earthen structures in the longitudinal and transverse directions and transfer the load from the site with a weak Foundation on the solid ground.
FIELD: road building, particularly to construct road pavement.
SUBSTANCE: pavement comprises sand underlayer with hydrophobous roll material and monolithic cement concrete layer. Pavement is provided with geomesh arranged on underlayer. Geomesh has threads working in tension in longitudinal and transversal directions and forming lower monolithic layer. Pavement comprises three-dimensional honeycomb geogrid having cells filled with monolithic cement concrete to form intermediate layer and with fiber threads randomly directed and uniformly distributed over the whole volume to form upper layer.
EFFECT: reduced water impermeability and increased wear resistance and bending strength; possibility to use pavement without rigid base construction.