87 results about "Geonets" patented technology

The invention provides a combined vacuum preloading method foundation treatment construction method which comprises two construction processes: superficial layer vacuum preloading and deep layer vacuum preloading, wherein the superficial layer vacuum preloading is firstly carried out, and then the deep layer vacuum preloading is carried out. The superficial layer vacuum preloading method comprises the construction process that laying woven cloth or geotextile on foundation to be treated; arranging a plastic drain plate; laying a filter pipe connected with the drain plate; laying a three-dimensional geonet or geogrid; and laying a plastic sealing film connected with a vacuum pump for vacuum air exhaust. The deep layer vacuum preloading method comprises the construction process that blow filling or return filling a construction and drain pad layer on a surface layer treated by the superficial layer vacuum preloading; arranging the plastic drain plate; laying the filter pipe; laying the sealing film; and vacuum air exhaust. The method has the advantages that the construction method provides early stage treatment method and usage of new dredgerfill, saves organism materials such as wattleanddab, bamboo sheathing and the like, reduces the material transport pressure and pollution for the soil body and the environment, and little environmental constraint and ahead of construction period compared with the traditional one-step vacuum preloading method.

A geonet having a length substantially greater than its width and including no more than first and second layers of strands. A first plurality of substantially parallel strands extends in the lengthwise direction and defines the first layer of strands, and a second plurality of substantially parallel strands is disposed on top of, and at an angle relative to, the first plurality of strands and defines the second layer of strands. The first and second plurality of strands are substantially incompressible and secured to one another at crossover locations. Geocomposites include geotextile bonded to at least one side of the geonet. The geonets/geocomposites are laid in geotechnical construction sites in the direction of expected drainage flow.

The invention discloses a construction method for soft soil roadbed high fill steep slop road foam light soil. The construction method for the soft soil roadbed high fill steep slop road foam light soil comprises the following steps of (1) excavation of a base; (2) construction of a pouring area, a pouring layer and a settlement joint: pouring a full-line foam light soil roadbed in a sectional, zoned and comprehensively layered manner; (3) laying requirements of a geomembrane and a geonet: the top of the foam light soil roadbed is sprayed with water or covered for curing in 7 days after beingpoured; and then the impermeable geomembance is laid on the top of the foam light soil roadbed; the impermeable geomembance at the top of the foam light soil roadbed is laid above a metal net; duringlaying, the splicing adopts a hot weld method; the splicing width is 5 cm; before laying, one layer of non-woven needle-punched geotechnical cloth is laid first as a pad; during laying, the non-wovenneedle-punched geotechnical cloth is flattened and tightened and then anchored by using a U-shaped nail; and the adjacent width of geomembance is overlaid and spliced on the impermeable geomembance; and (4) pouring of the light soil. According to the construction method for the soft soil roadbed high fill steep slop road foam light soil, the settlement caused by additional load in widened roadbedfilling can be reduced, the settlement between new and old roadbeds is eliminated, longitudinal cracks of a road surface are prevented, and broad market promotion values are realized.

The invention discloses a method for constructing a rocky backward slope vegetation. The method comprises the following steps of step 1, processing a backward slope surface of an original rock body; step 2, driving an anchor rod in the original rock body, and hanging a geonet on the backward slope surface; step 3, forming a ceramsite vermiculite concrete layer on the backward slope surface, forming a porous planting layer, and modifying the backward slope surface into a positive slope; step 4, laying an active protective net on the surface of the positive slope, and constructing a reinforced layer, treating a base surface of the positive slope with a vegetation concrete, and forming a vegetation concrete anti-scour layer; step 5, planting the vegetation on the surface of the vegetation concrete anti-scour layer to form a cross-vegetation layer of herb shrubs; step 6, conducting post conservation. The method maintains the stability of the slope through the anchor rod, the surface support and an SNS active net, and repairs a slope ecology.

The invention relates to an ecological slope protection building block of an ion type rare earth mine and an ecological slope protection system of the ion type rare earth mine. The ecological slope protection building block is of a positive cuboid I-shaped structure, and the size of the I-shaped structure meets: c1=c2=1/3c, wherein c is the width of I-shaped building blocks, c1 is the width of I-shaped cross bars, and c2 is the groove width of interlocking grooves; the depth of the interlocking grooves is equal to 1/3b, and b is the length of the I-shaped building blocks; a layer of reinforcing bamboo strips are arranged in 1/3h positions of the I-shaped building blocks along the height direction, and another layer of reinforcing bamboo strips are arranged in 2/3h positions, wherein h is the height of the I-shaped building blocks, and the reinforcing bamboo strips are #-shaped; a through hole is formed in the center of an I-shaped vertical bar along the height direction of each I-shaped building block. The ecological slope protection system is characterized in that a geonet is paved on the slope surface of a side slope, mutually embedded I-shaped building blocks are paved on the geonet, reinforcing wood sticks are inserted in the through holes of the I-shaped building blocks, and the reinforcing wood sticks are driven into an earth layer of the slope surface of the side slope. According to the ecological slope protection building block and the ecological slope protection system, disclosed by the invention, instability of the side slope can be prevented, the engineering manufacturing cost is low, and ecological environment protection is realized.

The invention discloses a construction method of a road-bridge connecting structure for retarding bumping at the bridge head. The connecting structure is arranged and comprises an inverted prismoid-shaped structure and filler, and the construction process of the connecting structure is completed through steps including leveling and vibrating compaction, mechanical-artificial material laying, mechanical compaction, laying of a geonet, layer-by-layer construction from bottom to top and the like. With adoption of the inverted prismoid-shaped structure and mixed sodium silicate-stabilized soil, a flexible structure layer with good integrality and higher rigidity is formed; an inverted prismoid-shaped structure reinforcement region is arranged in a road-bridge transition section, and the sodium silicate-stabilized soil is added to the structure reinforcement region, so that excessive differential settlement is eliminated, and smooth transition of a rigid abutment and a flexible subgrade modulus is realized. The method is simple to operate and facilitates large-scale popularization; moreover, after treatment with the construction method, the problems of bumping at the bridge head and secondary bumping can be effectively solved, the driving comfort and safety are improved, the maintenance cost of the bridge head is also greatly reduced, and the economic benefit is significant.

The invention discloses a protective greening structure for a rock or concrete high and steep slope and a construction method of the protective greening structure. The structure comprises an upper protective structure and a lower protective structure arranged on the surface of the slope. The lower protective structure comprises a plurality of ecological bags which are sequentially stacked up along the slope bevel, the ecological bags are filled with planting soil mixed with compound fertilizer, the surfaces of the ecological bags are covered with an iron gauze, the iron gauze is fixed through a plurality of anchor rods inserted into the slope, and the surfaces of the ecological bags are coated with a layer of ecological base material. The upper protective structure comprises a green cover geonet covering the slope surface, and the green cover geonet is fixed through fixing nails. Climbing plants are planted on a planting platform formed by the ecological bags on the topmost portion of the lower protective structure. The protective greening structure can effectively solve the problems that when the rock slope or the concrete high and steep slope is protected at present, the water retention capacity is poor, drought enduring cannot be achieved, the supplying capability is poor, construction is complex, the construction period is long, landslide hidden dangers exist and the cost is high.

The invention discloses a composite geotextile material capillary barrier draining structure and an unsaturated loess embankment structure. The composite geotextile material capillary barrier draining structure comprises three layers, namely a transport layer, a capillary barrier layer and an isolation layer; the transport layer and the isolation layer are made of nonwoven geotextile of different specifications, and the capillary barrier layer is a geonet; the capillary barrier layer prevents leakage flow in the soil body of a base layer above the capillary barrier layer from entering the soil body of a foundation below, water gathered in the transport layer drains along a slope, and the isolation layer is mainly used for preventing the soil body below the barrier layer from entering the pores of the capillary barrier layer as well as for discharging elevated capillary water in the soil body of the foundation. The composite geotextile material capillary barrier draining structure can discharge embankment water to a greater extent, so that the water contents in the base layer and the foundation are reduced, the reduction of embankment soil strength and embankment settlement generated by increase of the water content are avoided, and the durability of the embankment is improved.

The invention provides a road ecological slope protection system and a construction method. The road ecological slope protection system comprises a ground beam, a road bed layer, a spray pipeline andgeonets, wherein the ground beam is used for increasing the stability of a slope; the road bed layer is located above the ground beam, stepped ecological brick masonries are distributed on the slope of one side of the road bed layer, and ecological bricks in the ecological brick masonries are provided with brick holes for planting green plants; the spray pipeline is arranged on the top of the slope for spraying the green plants; the geonets are arranged between the ecological brick masonries at intervals, and are in contact with the road bed layer for enhancing the lap joint stability of the ecological brick masonries and the road bed layer. According to the invention, a stable slope structure is formed by laying the stepped ecological bricks, so that the energy of the slope drainage is dissipated, and also an ecological ladder can be constructed for people to go up and down; the geonets are arranged between the ecological brick masonries at intervals to achieve a very good reinforcingeffect and enhance the lap joint stability of the ecological bricks and the road bed; the green plants in the holes of the ecological bricks can absorb and accumulate the flushed water and soil, to further reduce the soil erosion.

The invention discloses a reinforced three-dimensional geotechnical pad. The reinforced three-dimensional geotechnical pad comprises a geogrid layer, a nonwoven cloth layer and a net wire layer, and is characterized in that the net wire layer is a coating layer formed by spraying nylon polyacyl or polypropylene wires on the outer surface of the geogrid layer by a plastic injecting machine; and the nonwoven cloth layer is sprayed on the upper surface and/or the lower surface of the net wire layer. The reinforced three-dimensional geotechnical pad tightly fixes geogrid with a reinforced effect and nonwoven cloth with a filter isolation effect, after hot melting, with the net wire layer, so that the tensile strength of a geonet pad is increased from conventional 10 KN/m to above 150 KN/m; and compared with a traditional geotechnical pad, the reinforced three-dimensional geotechnical pad improves the strength by multiple times, adds effects of soil reinforcement and scour prevention, effectively solves the defect of easy blockage of the traditional geotechnical pad in long-time rainwater and river water scouring or stressed state, and improves a river levee or road protecting effect.

The invention discloses a method for determining the optimal plant density of a three-dimensional geonet pad ecological slope protection slope surface, and relates to stability of the side slope or the slope. The method comprises: calculating the runoff depth, the minimum slope soil particle starting speed and the slope average runoff speed according to the runoff coefficient, the slope typical soil particle diameter, the slope roughness, the slope angle, the plant tillering coefficient, the leaf shape, the actual dry volume weight of soil, the stable dry volume weight after compaction, the film water parameter and the comprehensive binding power parameter; obtaining the total transverse row number of plants on the ecological grass planting slope surface according to the relationship between the average runoff speed of the slope surface and the minimum starting speed of slope soil particles; finally, determining the optimal plant density of the slope surface of the three-dimensional geonet pad ecological slope protection according to the total transverse row number of the plants. The defect that in the prior art, the optimal plant density of the slope surface cannot be accurately calculated in the construction process of the three-dimensional geonet pad ecological slope protection is overcome, a large number of surplus purchased grass seeds are prevented, and the engineering cost is greatly reduced.

The invention belongs to the field of ash dam structures and particularly relates to an ash dam upstream fitting-slope seepage draining structure of hydraulic ash dams and dry ash dams suitable for fuel coal thermal power plants. Geotechnical cloth and a geomembrane are adhered to two sides of a geonet through thermal bonding to form the fitting-slope seepage draining structure. A bottom layer sand protecting layer 100mm in thickness is laid on an ash dam upstream nature soil slide slope after the slope is finished. The fitting-slope seepage draining structure is laid on the bottom layer sand protecting layer, the geomembrane faces the ash slope upstream natural soil side slope, and the geotechnical cloth faces an ash layer. An upper layer sand protecting layer 100mm in thickness is laid on the geotechnical cloth side of the fitting-slope seepage draining structure, and slope protection rock blocks are constructed. The fitting-slope seepage draining structure has the advantages that the construction cost of the fitting-slope seepage draining structure is 35 yuan/m<2>, and construction cost is reduced by about 65%; traditional fitting-slope seepage draining structures needs to be synchronously constructed with a dam body, construction interference is large, the fitting-slope seepage draining structure can be constructed after the dam body is constructed, construction interference is avoided, and construction period is lowered effectively.

The invention provides a multifunctional three-dimensional flower column which is made of waste vehicle tires and a supporting structure of which is formed by a rigid column vertically fixed on a foundation. The flower column is characterized in that a plurality of waste tires are sleeved on the outer part of the rigid column, and all waste tires are piled up and down, forming a cylinder; a composite basal layer in which flowers and grass are fixed is arranged outside the waste tire column; the rigid column is of a plurality of angle bars, steel pipes, steel pins, bamboo rods, wood rods or cement rods; the composite basal layer is of a porous layer or multi-slit layer formed by the geonet, rush mat sheets fixed by lead wires or foam plastic plates or a water-bearing layer provided with a plurality of small water tanks. The flower column has the advantages of reasonable design, simple process, easy construction, convenient operation, low cost and easy popularization; moreover, the flower column can be used as a manual landscape in the municipal garden engineering as well as a green separation belt bumping prevention manual device in the road-bridge engineering; the multifunctional three-dimensional flower column is manufactured and simultaneously the reutilization of waste tires is realized, thereby avoiding the black pollution.

The invention relates to a geotechnical network frame, which comprises geotechnical network layers which are stacked and bundled by ropes to form a network frame body. The geotechnical network layer comprises a plurality of geotechnical strips, and adjacent geotechnical strips being bundled by ropes to form a geotechnical network layer on the same plane. The geotechnical network frame and the application thereof provided by the invention can solve the problems of poor mechanical performance and long manufacturing time after geobag connection in the prior art. The structure is stable, high bearing capacity and beneficial shock absorption effect on engineering are achieved, the bearing capacity of the foundation or the stability of a slope or a retaining wall is effectively improved, and engineering disasters such as foundation instability, landslide and the like are greatly reduced.

The invention discloses a screen type biological channel of a lined canal. The screen type biological channel comprises ecological gentle slopes arranged on two side walls of the canal and gradual change slopes on two sides of the ecological gentle slopes. Each ecological gentle slope is a soil gentle slope and is composed of a geonet, a culture medium and fast-growing grass seeds. The geonet is uniformly paved on the ecological gentle slopes, the culture medium is placed in the geonet and the fast-growing grass seeds are placed in the geonet; the gradual change slopes are connected to the section of the original canal and the ecological gentle slopes to guide a water flow, so that the local hydraulic loss caused by the ecological gentle slopes is reduced. The screen type biological channel disclosed by the invention has the advantages that an escape channel is provided for small amphibious animals in an irrigated area while the water-carrying capacity and the water-carrying efficiencyof the existing three-side bare lined canal are not reduced, so that the biodiversity and the ecological functions of the irrigated area are improved, and a technical support is provided for creatinga green ecological irrigated area.

The invention relates to a special geonet material prepared by modifying polyester and polyethylene mixed wastes and a preparation method for the special geonet material, and belongs to the technical field of waste plastic treatment and resource utilization. The preparation method comprises the steps of firstly grinding polyethylene terephthalate (PET) and polyethylene (PE) mixed wastes into materials with similar sizes, cleaning, drying and mixing uniformly to prepare PET/PET mixed wastes; and secondly mixing 100 parts of the prepared PET/PET mixed wastes with 5-10 parts of chlorinated polyethylene, 1-2 parts of maleic anhydride, 1-3 parts of a silane coupling agent, 1-3 parts of paraffin oil and 0.5 parts of ferrous sulfate, and performing extrusion granulation to prepare the special geonet material. The tensile strength of the special geonet material prepared with the method exceeds that of a Beijing Yanshan petrochemical brand-new LDPE-1I2A-1 geonet material; the strength requirement of the special geonet material is fully met; the special geonet material is high in quality and high in value; and the resource utilization of the plastic wastes is realized.

The invention relates to a device for controlling deformation of a vacuum tube in sandmat-free vacuum preloading overconsolidation soft soil, comprising a plastic woven fabric (6), a plastic drain board (1), branch pipes (2), main pipes (3), a geotextile (7) and a PVC geomembrane (8), wherein the plastic drain board is connected with the branch pipe (2) which is connected with the main pipe (3); the geotextile (7) covers the branch pipe (2); and the PVC geomembrane (8) covers on the geotextile (7). The invention is characterized in that: a. drain blind ditches (4) are arranged at two sides of the branch pipe (2) and the main pipe (3); b. tri-dimensional geonets are arranged between the branch pipes (2), between the branch pipes (2) and the main pipes (3), and between the main pipes (3); and c. a continuous supporting frame penetrates into the branch pipes (2) and the main pipes (3), the section of the supporting frame is cross-shaped, and each blade of the supporting frame (9) is distributed with water-gas balance holes (10) along the length direction thereof. The device in the invention can ensure drainage and aeration capability of the vacuum system and eliminate vacuum blind spots under membrane.

The invention discloses a device and method for solving a road and bridge transition section bump problem. The device for solving the road and bridge transition section bump problem comprises a connecting structure established at a road and bridge transition section. The connecting structure comprises a CFG pile, a cushion layer, an anti-settling plate, a soil filling structure, a cement soil grout treatment area and geonets, the CFG pile is located on the lowermost layer of the device, the cushion layer is arranged above the CFG pile, the cushion layer stretches into a common roadbed sectionrefilling area by 1m in length, the anti-settling plate is arranged above the cushion layer, the soil filling structure is arranged above the anti-settling plate, the soil filling structure is partitioned through the geonets, layered in parallel and filled with filler. Each geonet layer and various layers of filler of the soil filling structure are locked together, a stable plane is formed, the cement soil grout treatment area is in a wedge shape and is located at the upper portion of the soil filling structure, one end of the cement soil grout treatment area is connected with a bridge and culvert platform back behind a bridge platform, and the other end is connected with an original roadbed. By means of the device and method for solving the road and bridge transition section bump problem,the road surface service life can be prolonged, the bridge head bump phenomenon can be effectively prevented and treated, the road surface maintenance expense is greatly reduced and the road surfacemaintenance time is greatly shortened.

The invention relates to an ecological greening composite mesh pad for slope protection and a manufacturing method thereof. The ecological greening composite mesh pad for slope protection comprises anupper-layer stretching mesh, a bubbling three-dimensional geonet and a lower-layer stretching mesh which are sequentially arranged from top to bottom; geotextile is further arranged on the bottom face of the lower-layer stretching mesh; and the upper-layer stretching net, the bubbling three-dimensional geonet, the lower-layer stretching net and the geotextile are connected into a whole through suture lines. The composite mesh pad with advantages of a three-dimensional mesh pad and advantages of the geotextile is formed by the upper-layer stretching mesh, the bubbling three-dimensional geonet,the lower-layer stretching mesh and polypropylene filament spunbond geotextile, can be used for slope protection and can adapt to severe environments such as acid and alkali; moisture evaporation canbe reduced, and infiltration capacity is increased; the requirements of rapid protection engineering can be met in a remote planting mode; a protection system with self-growth capability can be constructed on a slope surface; and a slope is reinforced through growth of plants, and scouring resistance, sliding resistance and ecological restoration of the slope are achieved.