2709 results about "Soil horizon" patented technology

The invention discloses a testing device and a method of ground deformation caused by simulating metro shield tunnel construction, and belongs to the technical field of underground engineering experiments. The overall process that similar materials are used for simulating soil layer structures, a tunnel simulating device is used for simulating tunnel structures, and a ground loss simulation system is used for simulating disturbed soil around a tunnel and ground loss is included. After the installation of the device is completed, the ground loss simulation system is started, an airtight water bag which is filled with water by using a pressure water pump in advance is drained step by step through a drain pipe, and water discharge is accurately controlled through a water stop valve and a measuring tank. Moreover, the water discharge is recorded, the ground loss is simulated, a corresponding stratum is deformed, and then the earth surface subsides, the surface subsidence is accurately measured through a dial indicator, and a measured value is recorded. Stratum loss ratio is calculated out through conversion, and the stratum loss ratio and the subsidence measured value are made into forms and images together, and thereby the relation between the stratum loss ratio under different stratum structures and the surface subsidence can be measured out simply, conveniently and accurately.

The invention discloses a high and steep rocky slope vegetation planting method. The high and steep rocky slope vegetation planting method comprises the following steps of 1 digging a plurality of planting holes in the surface of a high and steep rocky slope; 2 drilling a plurality of root system holes in the bottoms of the planting holes; 3 pouring water into the planting holes and the root system holes after the root system holes drilled, mixing and stirring clay and water to form slurry after accumulated water disappears, filling the slurry into the root system holes and coating slurry on the inner walls of the planting holes; 4 sequentially filling water storage layers, a nutrient soil layers, seed layers and evaporation preventing layers in the planting holes from bottoms to tops. By means of the high and steep rocky slope vegetation planting method, the vegetation moisture problem is solved, vegetation survival rate is improved, and maintenance cost is reduced.

A basement engineering waterproof and drainage method is provided. The wall footing of the outside wall in basement engineering is embedded in watertight or micro-watertight soil rock layer or cement soil layer. The wall footing intercepts water by a thin-part structure. The cushion of the basement engineering soleplate and the falling layer of the top board are composed of combined water-proof layers. The late poured band, the movement joint and the horizontal construction joint at the lower part of the outside wall are treated by a water-proof structure combined with waterproofing measures. The basement engineering is provided with a drainage system. The groundwater and surface water at the soleplate are drained into city drainage pipelines via a soleplate part of the drainage system. The rainwater of overburden layer bottom of the top board is then drained into city drainage pipelines via the indoor part of the drainage system. The invention is designed by adopting a one-body method of arranging the basement engineering waterproofing, drainage and anti-floating as well as underground engineering space enclosing structure and pipelines, thereby shortening the construction period, reducing the engineering cost, increasing the durability and reliability of underground building space enclosing structure and waterproof layer as well as pipelines.

A system for generating digital models of nitrogen availability based on field data, weather forecast data, and models of water flow, temperature, and crop uptake of nitrogen and water is provided. In an embodiment, field data and forecast data are received by an agricultural intelligence computing system. Based on the received data, the agricultural intelligence computing system models changes in temperature of different soil layers, moisture content of different soil layers, and loss of nitrogen and water to the soil through crop uptake, leaching, denitrification, volatilization, and evapotranspiration. The agricultural intelligence computing system creates a digital model of nitrogen availability based on the temperature, moisture content, and loss models. The agricultural intelligence computing system may then send nitrogen availability data to a field manager computing device and/or use the nitrogen availability data to create notifications, recommendations, agronomic models, and/or control parameters for an application controller.

The invention discloses a grouting simulating test device and a test method thereof, and belongs to the field of indoor grouting simulating test. The grouting simulating test device comprises a pressurizing system and a grouting permeating device, wherein the pressurizing system comprises a pressurizing air pump, a mortar storage bucket and a pressure gauge, a stirrer is arranged in the mortar storage bucket, and the upper part and lower part of the mortar storage bucket are respectively provided with a mortar inlet and a mortar outlet which are communicated with the pressurizing air pump and the grouting permeating device; the grouting permeating device comprises an inner cylinder and an outer cylinder, and water permeating holes are distributed in the wall of the inner cylinder; a grouting pipe is arranged at the top part of the grouting permeating device and extends into the grouting permeating device, the exterior of the grouting pipe is provided with external threads, and a porous separating plate is sheathed at the exterior of the grouting pipe, and can move vertically; holes are formed in the bottom part of the grouting permeating device, and the upper part of the grouting permeating device is provided with water permeating stones. The grouting simulating test device has the advantages that the grouting simulating test device can be used for grouting simulating test of multiple soil layer overlying conditions, different filling and building conditions and water-containing soil conditions; the operation of the test method is simple, multiple working conditions can be simulated, the grouting simulating effect is approximate to the actual condition, and the grouting effect is visual and visible.

The invention discloses an urban road rainfall runoff ecological coprocessing device and a method. The device comprises an urban road rainfall runoff ecological coprocessing box and a bioretention purification unit, wherein an overflow weir board, a second screen mesh partition and a perforation partition are arranged in the urban road rainfall runoff ecological coprocessing box at intervals sequentially; the interior of a box body is divided into an overflow chamber, a water inlet chamber, a water distribution chamber and a bioretention purification chamber that are sequentially arranged by the overflow weir board, the second screen mesh partition and the perforation partition; and the bioretention purification unit is arranged in the bioretention purification chamber, and comprises a gravel layer, a sand filter layer, a planting soil layer and plants. The device and the method can sequentially remove floating matters, particles and soluble pollutants that are in different particle sizes in rainfall runoff, achieve hierarchical control of the pollutants in the rainfall runoff, can store a part of rainfall runoff to meet growth requirements of the plants in the bioretention unit, achieve a water conservation effect, and can also achieve multi-purpose control of water quality and water quantity of the urban road rainfall runoff.

The invention relates to an active powder soil solidifying agent as well as a preparation method and application thereof. The active powder soil solidifying agent comprises the following components in percentage by weight: 4%-8% of binding materials, 76%-89% of aluminosilicate materials, 4%-12% of active materials and 3%-7% of exciting agents. The active powder soil solidifying agent disclosed by the invention is reasonable in component proportion, obtains the raw materials locally, is convenient, advisable, simple in production process, low in energy consumption, low in cost, wide in trial range on different soil, high in solidifying strength and stable in solidified soil layer property; the prepared soil solidifying agent is applied to a site construction process, simple and easy to operate; compared with the traditional construction process, the prepared soil solidifying agent is less in usage amount, creates better social benefit, economic benefit and environment benefit and plays a certain environmental protection role by utilizing waste residue coal ash, gangue, iron ore slag and the like.

The present invention relates to a method for planting grape in arid desert area. Said method includes the following several steps: according to the spacing distance of 4-6m excavating overwintering soil-covering cold-resisting channel, excavating planting channel in the centre of cold-resisting channel bottom, laying PVC plastic film on the channel bottom of planting channel and two side walls, filling coarse sand or chad into the channel bottom, then making the planting channel be filled up with soil and fertilizer mixture, according to the spacing distance of 1m planting grape young tree, at two sides of tree body respectively setting one drip irrigation band, at two sides of root system alternatively making irrigation, adopting small trellis form and pruning, when autumn changes into winter in every year, removing aerial portions of grape main vine and fruiting twigs from grape trellis and placing them into cold-resisting channel and covering said cold-resisting channel with a layer of sandy soil whose thickness is 50cm for overwintering.

The invention discloses a method for planting organic passion fruit trees. The method includes the steps of variety selection, site selection, soil preparation, soil pH adjustment, establishment of a passion fruit tree foundation, field planting, reshaping and pruning, field management, blossoming, fruit yielding and the like. According to the method, organic fertilizer and a low-toxicity prevention method are adopted in fertilization and pest control, so that the pulp of produced passion fruits is full of yellow fruit juice, the content of sugar is high, the color is bright, the yield reaches up to 2 tons per mu each year, pollution is avoided, and five seasons of fruits can be harvested each year. The successful planting of the organic passion fruit trees provides a theoretical and practical basis for creating incomes of local farmers. According to the method, a leeward apricus flat ground is selected, and the place where a good source of water is obtained, the soil layer is thick, fertility of the soil is above the average and transportation is convenient is used as a planting foundation, so that it is guaranteed that the passion fruit trees can grow in a good environment, the roots of nursery-grown plants are planted in furrows and exposed to the sun, hence, the roots can better absorb sunshine, and fertilization and weeding are further facilitated.

The invention discloses a desert control method of a chemical sand-fixing greening technology based on organic composite materials, and the desert control method is characterized in that hydrophilic polyurethane resin curing agent solution is sprayed on a sand or soil layer of greening objects for sowing the vegetation for forming a porous fixed sand layer. The fixed sand layer formed by the method has appropriate thickness and strength, good durability, good anti-freeze and melt properties and functions of water retention, thermal insulation, ventilation, vegetation and the like. According to the method of the invention, the stable and effective solidifying can be carried out on sand even under the specific desert environments of no abundant groundwater sources and strong wind erosion, and the purpose of vegetation greening can be also realized. The method has large-scale construction properties and good economic performances, thereby being applicable to the needs of large-scale chemical sand fixing and vegetation greening of the vast desert and realizing the plant greening function and the ecological restoration and the control of desertified land.

The invention discloses an ecological integrated improved facility and improving method for saline and alkaline land. The ecological integrated improved facility and improving method are characterized in that: according to the ecological integrated improved facility for the saline and alkaline land, a salt removing filter layer is filled in a blind ditch; a layer of non-woven fabric is paved on the surface of the salt removing filter layer; mixed soil a of original soil and organic matters is filled above the non-woven fabric of the blind ditch; the blind ditch is filled and leveled up with the mixed soil; small square plots are arranged above the mixed soil a; acid salt removing columns are equidistantly arranged on each work plot; plants are respectively planted on each work plot; and thick peat soil is paved on the surface of the soil around the plants. The ecological integrated improving method for the saline and alkaline land comprises the following steps of: blocking; arranging the blind ditch; filling the blind ditch; filling and leveling up the peat soil; applying the organic matters; washing and removing salt; applying a modifying agent and acid fertilizer to the saline and alkaline land; arranging the salt removing columns; deeply ploughing and cultivating; and paving the thick peat soil. The ecological integrated improved facility and improving method disclosed by the invention have the advantages that a soil crumb structure is helped to form; the water permeability performance among soil layers is improved; and the development of crop root systems is effectively promoted.

The invention discloses an irrigation control method and system based on crop root zone soil moisture and root distribution. The method comprises the steps that parameters are set, soil water content in each soil layer of a root zone is monitored, root zone weighted average soil water content is computed according to relative root length density distribution, a crop water stress index (CWSI) is computed, when the CWSI computed value is larger than a preset CWSI critical value, irrigation is started; theoretical irrigation amount can also be computed according to planned moisture layer soil water content, and when practical irrigation amount reaches the theoretical irrigation amount, irrigation is stopped. According to the irrigation control method and system, the water stress degree of crops can be accurately and conveniently estimated, the fact that the root zone soil moisture distribution conditions and the crop moisture conditions are considered during irrigation is controlled according to the water stress degree, and an effective tool is provided for realizing of the purposes of water saving and production increasing.

The invention relates to a curing agent for reinforcing and treating a soft soil foundation and application thereof. The curing agent for soft soil contains 10-25% of cement clinker, 65-80% of slag, 4-10% of filling material, 1-10% of expanding agent, 0.2-5% of alkaline excitation agent and 0.02-0.3% of surfactant, wherein the filling material is fine sand or/and coal ash; the expanding agent is gypsum or desulfurization gypsum; the expanding agent is calcined lime or sodium hydroxide; and the surfactant is triethanolamine or calcium lignosulphonate. The curing agent for soft soil can be applied to reinforcing soft soil like cumulosol, high-salinity stratum or the like, and the using amount of the curing agent for soft soil is preferably 8-20% of the weight of a reinforced soil body. The curing agent for soft soil, provided by the invention, only contains a little cement clinker and can enable soil layers with poor cement reinforcing effects, such as cumulosol, high-salinity stratum or the like, to obtain better physical and mechanical performances after the curing agent for soft soil is applied.

The invention belongs to the field of tunneling in geotechnical engineering and underground engineering, and particularly relates to a centrifugal experimental simulation testing device for surface subsidence induced by city shield tunnel construction. The testing device mainly comprises a model box, a small displacement meter bracket, a big displacement meter bracket, a tunnel excavation device, a linear variable differential transformer (LVDT) displacement meter and the like, wherein the model box is a hollow cuboid; the small displacement meter bracket and the big displacement meter bracket adjust the LVDT displacement meter along the horizontal direction and the vertical direction, so that the surface subsidence and the soil layer deformation can be measured; and the tunnel excavation device can simulate the soil body deformation caused by stratum loss by discharging a certain volume of water. Through the device, the deformation influence of the city shield tunnel construction on surrounding soil layer can be more conveniently, really and effectively simulated, so more real and accurate experimental data can be provided for tunnel design and construction, and high efficiency and safety of the city shield tunnel construction are guaranteed.

The invention discloses an indoor simulation experiment system for pipe-jacking grouting drag reduction, which comprises an experiment box. An opening and a vertical loading test system are arranged on the experiment box; obround holes are arranged on two opposite sides of the experiment box; a horizontal loading test system is arranged on the one side of the experiment box; the experiment box is internally filled with a soil sample; a pipe to be tested penetrates through the experiment box via the obround holes on the two sides of the experiment box. The experiment system also comprises a grouting system and a grouting pipe connected with the grounding system; the pipe to be tested is formed by a front pipe segment and a rear pipe segment that are connected with each other; and the diameter of the front pipe segment is larger than that of the rear pipe segment; at least one grouting hole is configured on the wall of the pipe to be tested; and a slurry outlet end of the grouting pipe extends in the pipe to be tested and is connected with the grouting holes. According to the invention, the experiment test can simulate pipe-jacking process in soil layers; mixed slurry is injected to surrounding soil during the jacking process to test frictional resistance and frictional coefficient during the pipe-jacking process under different slurry proportions and different grouting pressures, so that the grouting pressure and the grouting proportion suitable for pipe-jacking in the soil layers can be obtained comprehensively and accurately.

The present invention relates to a rainwater-collecting permeable concrete pavement system. It is characterized by that said pavement structure includes rammed earth layer whose thickness is greater than 10mm, general concrete base layer whose thickness is 80-100 mm, permeable concrete structure layer whose thickness is 100-150 mm and permeable concrete face layer whose thickness is 40-60mm from bottom to top. Said pavement system is adjacent to green belt, under the green belt a rainwater-collecting pool is set, and the bottom portion of said rainwater-collecting pool is equipped with a submersible pump. Along the length direction of said pavement structure two sides of said pavement system are respectively equipped with a rainwater-collecting channel, the outlet of said submersible pump is connected with pipe network, and said pipe network is distributed in the green belt.

The invention discloses a method for processing a soft roadbed through artificial composite crusts, including the following steps: first, constructing micro-piles; second, constructing a construction waste cushion layer; third, constructing pile caps and paving steel-plastic geotechnical grilles; fourth, filling and building a soillime layer; fifth, filling and building a compact clay-doped construction waste layer; and sixth, filling and building a road embankment. The micro-piles is connected with a plastic or hard plastic claypan and a soft plastic claypan; pile caps are arranged on the piles and the steel-plastic geotechnical grilles are connected on the pile caps; the undersides of the steel-plastic geotechnical grilles are connected with the construction waste cushion layer, and the upsides are connected with the soillime layer; and the soillime layer is connected with the compact clay-doped construction waste layer which is finally connected with the road embankment. The method reduces construction cost and environment pollution, realizes utilization of a large amount of construction waste, and remarkably improves the bearing strength and uneven settlement resistance of soft roadbeds. The method is also applicable for soft roadbed treatment in large area in other municipal projects.

The invention relates to a construction method of a connecting channel by a double-row hole horizontal freezing method. The method comprises the following steps: freezing parameters are defined; frozen holes are arranged and drilled; a freezing system is mounted and operated; the connecting channel is constructed and excavated; injected slurry is unfrozen and thawed initiatively, artificially and compulsively combining construction monitoring and natural unfreezing; in the method, at the time of natural unfreezing, hot brine circulates in the frozen holes, frozen soil is unfrozen compulsively in means of area separation, and the unfreezing is carried out from down to up; thaw settlement grouting is carried out by a pre-buried injection pipe, and the grouting is carried out from down to up; the frozen holes are arranged in a row of outer holes and a row of inner holes; the length of the holes is subject to the length reaching a side duct piece, the way of holing on the two sides is applied; the connecting channel is excavated in the way of dynamic excavation, namely the heading and constructing of two main tunnels are operated simultaneously. The method efficiently controls the stability of the mouth of a cave in the process of excavation and the sedimentation of the connecting channel and the two main tunnels, and has the advantage of saving the construction period, therefore, the method is applicable for the freezing construction of the connecting channel of various soft soil layers.

The invention discloses a hydraulic monitor rod of seabed soil multifunctional multipath pore in the sea detection technique domain, which is characterized by the following: the bottom of hydraulic monitor rod contains static CPT probe 5 and the top contains data sealing bin 1; several sectional interphase arrangements of detecting rod end connector 2 and hollow connection sleeve are connected between the data sealing bin 1 and static CPT probe 5. The invention can be used in the hard sand marine site of named 'steel sand', which is allocated safely at even slow speed to monitor different depths of wave and tide condition.

The invention discloses a method for combination enclosure protection of profiled bar frozen wall pit, and a structure thereof, belonging to the technical field of the building construction. The method comprises the steps as follows: according to the excavation limit specified in the construction drawing, the frozen wall construction and the insertion position of the profiled bar are determined; a guide trough is excavated at the insertion position of the profiled bar; a guideway is arranged right above a guide ditch; the profiled bar is pressed in soil by the self-gravity of the profiled bar and the external load; the soil layer is frozen by an indirect cooling type (the salt water is cooled by a freezing machine; subsequently, the low-temperature salt water is circulated in a liquid inlet pipe, a freezing pipe and a liquid returning pipe). A top-pressing beam is constructed along the circumference of the pit at the position where the profiled bar is inserted, so as to improve the whole stiffness of the frozen wall; after the basement structure is completed, the freezing is released immediately and the profiled bar and the freezing pipe are recycled. The invention has the advantages of high strength and good load-bearing capability and can be suitable for various soil layers and various underground engineering.

The invention relates to a combined retaining structure and a construction method thereof. The combined retaining structure comprises anti-sliding piles, connecting beams, a ribbed soil retaining wall, rigid panels and connecting components. The anti-sliding piles penetrate a covering soil layer and are anchored in a stable stratum. The anti-sliding piles are arranged in parallel, and the connecting beams are arranged at the tops of the anti-sliding piles. The rigid panels are arranged at the tops of the connecting beams. The ribbed soil retaining wall is built behind the rigid panels. The connecting components are arranged between the rigid panels and the ribbed soil retaining wall and connected with the rigid panels and the ribbed soil retaining wall respectively. The combined retaining structure is high in adaptability to foundations and sites, higher in overall rigidity, good in stability, convenient to construct, large in building height, good in anti-seismic property and suitable for highfill projects on complex terrains of western mountainous areas.

A cutter element is provided for use on a rotary drill bit of a drilling string to cut earthen formation and the like. The cutter element includes a cutting portion formed from cutting material adapted to cut into the earthen formation, and a substrate positioned adjacent the cutting portion. The cutting portion and the substrate form a body having a substantially planar front face, a longitudinal axis extending centrally through the front face and the substrate, and a circumferential surface extending inwardly form the front face and spaced outwardly from the longitudinal axis. The cutting portion includes a cutting face that provides at least a portion of the front face. The cutting portion extends longitudinally inward from the front face to a back surface engaging or inter-facing the substrate. Thus, a distinct, longitudinally extending volume of cutting material is provided and includes a predesignated portion of the circumferential surface that extends from the cutting face to the back surface, the circumferential surface portion being predesignated for wearing contact with the earthen formation.

A soil sampler for wet land comprises main body of round pipe and sample connections. The sampler is featured as setting sample connections on sidewall of the round pipe in sequence from top to bottom, sealing top end of the sampler, welding two rings on the sealed top and having one end of round pipe perpared in sawtooth form with sharp edges.

The invention discloses a process for grouting on the back of a shield segment to control stratum settlement in shield tunnel construction. The process comprises steps of synchronous grouting, secondary grouting and a special treatment process; during synchronous grouting, when a shield advances and a shield tail is formed, a grouting pump of a shield tunneling machine is used for symmetrical grouting through a synchronous grouting system of the shield tunneling machine; during secondary grouting, double grout is injected to the back of the segment through a shield segment secondary grouting hole, and a gap on the back of the segment is subjected to secondary filling and compression; and the special treatment process comprises steps of adding a triallyl cyanurate (TAC) high-molecular polymer material solution and pressing and injecting epoxy resin seal reinforcing rings. By the process, particularly the TAC high-molecular polymer is added to improve a soil layer and the epoxy resin reinforcing rings are pressed and injected to reinforce the stratum in the special treatment process, the grouting effect is good in a safe and convenient way, the flow and loss of the grout are prevented, the grouting plumpness is ensured, the soil body can be well improved, the stratum is reinforced, the settlement amount is effectively controlled, and the shield tunneling construction is safely and smoothly carried out.

The invention relates to a method to construct the pile by injecting grout through a bag, which is characterized in that the method comprises the procedures: 1) a pile hole is formed in the soil with a hole-making machine; 2) a bag is sleeved outside a grout injection tube and the bag is bound on the grout injection tube with a strip segment by segment along the axial direction, the two ends of the bag is tightly bundled, the lower end of the grout injection tube is sealed and the grout injection tube is provided with an injection hole on the tube wall; 3) the grout injection tube which is sleeved with the bag is placed into the pile hole; 4) the grout injection tube is used for injecting grout into the bag section by section from the bottom to the top, the next section is injected until the design pressure of the present section is reached until the whole bag is filled with grout and a whole pile body is formed. The invention adopts the bag pile to enhance the soft underlying soil, which can commendably control the investment and solve the problem of sedimentation and stability. As the bag has the separation effect, the grout can facilitate the surrounding soil to compact and expel the water by expanding the bag; the formed pile body is relatively regular and the intensity of the pile body is higher and controllable.

The invention provides a method for improving saline-alkali soil. The method comprises the following steps of: removing topsoil of the saline-alkali soil, setting an air-permeable anti-seepage aggregate layer on the saline-alkali soil of which the topsoil is removed, and setting a planting soil layer on the air-permeable anti-seepage aggregate layer. The invention also provides a planting method for the saline-alkali soil. The method comprises the following step of: planting plants and/or plant seeds in improved saline-alkali soil, wherein the improved saline-alkali soil is treated by the method for improving the saline-alkali soil. The method for improving the saline-alkali soil and the planting method for the saline-alkali soil can effectively prevent the planting soil layer of the surface layer from being salinized, so that the planting soil layer is suitable for plantation for a long time; moreover, by the method for improving the saline-alkali soil, a large amount of fresh water resources are not needed for washing, so that the water consumption is effectively reduced and the using range of the method is expanded.

The invention provides a method for constructing a water-stop curtain of a double-high-pressure rotary grouting pile, which is suitable for a water-stop curtain or foundation reinforcement of a deep foundation pit in a soil layer with a depth of 30 to 60 m. The method includes the following steps: construction of a water-stop curtain; Selection of design parameters; selection of dual high-pressure jet grouting piles and construction parameters. The effect of the invention is that the double-high-pressure rotary spraying method increases the slurry pressure on the basis of the traditional triple-tube rotary spraying method, and sprays and punches the soil body again to form a larger diameter and fill. It solves the technical problem that traditional techniques cannot form piles in 40-60m ultra-deep foundation treatment, and forms a vertical water-stop curtain through interlocking piles, which has been successfully applied in deep foundation pit anti-seepage, water-stop and foundation reinforcement. The performance of water stop reinforcement in ultra-deep foundation treatment is improved, the strength and impermeability of the pile body are improved, and the construction cost is reduced.

The invention provides a three-dimensional underground pressure-bearing water flow-subway tunnel structure interaction simulating device which comprises a model case, a linear tunnel structure system, a water feeding and draining system, a pressure-bearing water head control system, a loading system and a measuring system. The linear tunnel structure system is arranged in a sandy soil layer in the model case, and the water feeding and draining system and the pressure-bearing water head control system carry out control and simulation on the water head of the sandy soil layer to form a water-containing pressure-bearing layer. In the experiment system, the measuring system detects data in real time. The model case is used as a bearing device and matched with other systems to simulate the influence of a linear subway tunnel structure on underground pressure-bearing water flow regime and the influence of underground pressure-bearing water flow changes on the subway tunnel structure, the anti-floating design effect of the subway tunnel structure can be verified, the influence of underground pressure-bearing water flow on the anti-floating design effect can be evaluated, and the safety influence of local leakage on the subway tunnel structure can be evaluated.

The invention provides a method of para position allocation and ,mixing cultivation of planting grass for afforestation on purple hills, which comprises the steps of: (1) division of land types: purple hilly lands are divided according to the acidity, basicity and lithology of the lands, soil erosion, soil thickness and terrain features; (2) selection of species of trees and grasses: species of trees and grasses which are applicable to grow in varied purple lands are selected according to the selection experiments of the different types of species of trees and grasses used for afforesting of purple hilly lands, and fitting degrees of the species of trees and grasses to each kind of land are specified; (3) para position allocation of the species of trees and grasses with the kinds of the lands: corresponding species of trees and grasses are allocated on the most suitable or relatively suitable lands; (4) mixed disposition of trees: different optimized disposition modes for purple hilly mixed forests are selected according to the mixed experiments of the trees for different kinds of lands of hills and hilly areas with purple soil, and trees and bushes, legumes and non-legumes, species of trees of deep root system and shallow root system, horizontally growing type and vertically growing type, soil fixing type and soil improved type are mixed. The method of the invention adopts trees, brushes and grasses to be planted on the most suitable and relatively suitable hills with purple soil, thus realizing precise para position allocation, high survival rate being up to over 90 percent and greatly accelerating the growing speed and forest establishment speed.

The invention provides a rainwater collection diversion and strata conservation regulation and storage system comprising a water collection tank, a filter tank, a sedimentation basin, a regulation and storage pool and a control system; the water collection tank is connected with the filter tank, and a filter grid is arranged on a connecting portion between the water collection tank and the filter tank; a water exit of the filter tank is connected with the sedimentation basin, and a filtering net is arranged on a connecting portion of the two; the sedimentation basin is connected with the regulation and storage pool through a rainwater inflow pipe arranged above a side wall; the side wall of the regulation and storage pool is provided with an overflow pipe and water diffusion pipes uniformly arranged around the overflow pipe, wherein the overflow pipe is connected with a municipal downpipe net, and the water diffusion pipes extend outwards to surrounding soil by taking the regulation and storage pool as a center; the rainwater collection diversion and strata conservation regulation and storage system is controlled by the control system, and can collect, purify, store and divide road rainwater, thus realizing peak clipping, regulating, storing, strata conserving and water ecology restoring purposes, and providing important reference meanings for construction of a sponge city.