57 results about "Subsoil" patented technology

The invention is a system and method for repairing, improving, and stabilizing subgrade and subsoil / natural ground layers of a rail bed generally consisting of softer soils. One embodiment includes a method of installing subsurface inclusions and ballast fills comprising injected slurry mixtures of stabilizing material such as cement grout mixed with in situ soil. Another embodiment includes a system of installed ground inclusions and ballast fills. Another embodiment includes an integrated system of equipment for emplacing the system of inclusions and ballast fills.

The invention belongs to the field of soil dissolved organic matter analysis, and provides a multispectral-based DOM detection and reclamation influence evaluation method, which comprises the following steps: step 1, collecting dry farmland soil samples of different reclamation years, and obtaining soil column samples of a plough layer, a plow pan and subsoil; 2, extracting, centrifuging and filtering the soil sample to obtain a DOM solution; 3, detecting the DOM solution by adopting an ultraviolet-visible absorption spectrum; step 4, adopting a three-dimensional fluorescence spectrum and combining parallel factor analysis to obtain fluorescence components and source characteristics of the DOM solution; step 5, analyzing molecular composition and characteristic parameters of the DOM solution by adopting solid-phase extraction in combination with Fourier transform ion cyclotron resonance mass spectrometry; and step 6, based on the detection data in the steps 3-5, evaluating the influence of reclamation years on the composition, structure and degradation characteristics of the DOM. According to the method, multi-dimensional detection of soil DOM is realized through a multi-spectrum and mass spectrum combined technology, and DOM is comprehensively analyzed from a macrostructure to molecular composition.

The invention provides a preparation method of artificial oven subsoil. The preparation method comprises the following steps: firstly, mixing shrub ash, rice hull ash and wormwood ash in proportion to prepare plant ash, then mixing calcined and crushed oyster shells and plant ash, adding water, washing and removing impurities to prepare mortar, and then adding loess powder for injection molding; drying at the temperature of 250-350 DEG C, oxidizing at the temperature of 450-650 DEG C and reducing at the temperature of 750-850 DEG C to finally obtain the artificial oven subsoil. According to the method, the natural production process of traditional oven subsoil is simulated, the compound structure and effective component composition of the natural oven subsoil are successfully reproduced, the obtained product is stable in component and quality, the content of heavy metal and pesticide residues meets the safety standard, and the problems that natural resources are exhausted, and the quality of the oven subsoil all over the country is uneven are effectively solved.

The utility model provides a soft foundation embankment structure with an embankment body space integrated with a municipal function, which relates to the technical field of seawall structures, and comprises a suppression platform I, a seawall complex, a closed earthwork and a suppression platform II which are sequentially arranged from open sea to inland, the seawall complex comprises a pile foundation, a reinforced concrete raft plate arranged on the pile foundation and a reinforced concrete empty box dike body arranged on the reinforced concrete raft plate. A comprehensive pipe gallery space, a parking space, a patrol inspection and maintenance and driving channel and a driving entrance and exit for entering the patrol inspection and maintenance and driving channel are formed in the reinforced concrete empty box embankment body, and a drought gate is arranged at the entrance of the driving entrance and exit. The repression platforms in front of and behind the embankment body are implemented firstly, cement mixing piles and other composite foundation treatment methods are adopted for foundations below the platforms, the negative friction resistance effect, deformation and other adverse effects caused by soft soil foundations on pile foundations are greatly reduced, the mixing piles below the repression platforms on the inner side are densified to form frame supports, and the good shielding effect on later land area soil filling influences is achieved.

Receptacle (1) for the detachable arrangement of a device (2) for improving, processing or changing the soil mechanical properties of soils, comprising at least one soil processing unit (3) on a carrier device (4), characterized in that the receptacle (1) for the detachable arrangement on the carrier device (4) has a compensating element (6) which is designed to ensure at least lateral mobility of the soil processing unit (3) relative to the carrier device (4).

The invention relates to a profiling two-section subsoiler for hilly and mountainous areas, and belongs to the field of agricultural mechanical equipment. The deep scarification device comprises a three-point suspension device, a first-stage profiling device, a second-stage profiling device, a first-stage deep scarification device, a second-stage deep scarification device, a rear soil crushing device, a rack and a stop dog, the first-stage deep scarification device is located at the front end of the rack, the second-stage deep scarification device is located behind the first-stage deep scarification device, the soil penetrating depth of the first-stage deep scarification device is small, and the soil penetrating depth of the second-stage deep scarification device is small. The secondary deep scarification device is deep in soil, the primary deep scarification device and the secondary deep scarification device are matched to complete deep scarification operation of cultivated land, the primary deep scarification device is installed on the primary profiling device, the secondary deep scarification device is installed on the secondary profiling device, the rear soil crushing device crushes deep scarified soil, and follow-up cultivation operation is facilitated. The subsoiler solves the problems of low terrain flatness of cultivated land in mountainous areas and hills, low operation matching horsepower of the subsoiler, large subsoiling operation resistance, poor effect and difficulty in breaking a plow pan, so that the subsoiling operation of the cultivated land in the hilly areas is efficient and rapid.

The application provides a pick-up type underground groundwater level control device, which comprises a receiving box and a machine box buried in a pit, a top end of the receiving box is detachably provided with a cover plate, a top end of the cover plate is provided with a water filling opening assembly, an inside of the receiving box is provided with a rainwater filtering and storing assembly, a top end of the rainwater filtering and storing assembly is provided with a surface water detection assembly protruding above the ground, the machine box is provided with a drainage mechanism for pumping rainwater in the receiving box, a water outlet end of the drainage mechanism is connected with an underground drainage pipeline, an inside of the machine box is provided with a liquid level jump mechanism for controlling opening and closing of the drainage mechanism according to a water level in the receiving box, a power supply for supplying power to the device as a whole and a controller for controlling operation of the device as a whole. The application can collect rainwater, adjust water storage capacity, effectively filter rainwater, discharge excess rainwater into the underground drainage pipeline and automatically monitor whether to perform greening belt irrigation and the like.

The present invention discloses a method for inducing synchronous emergence of rice seeds. The method comprises: crushing and sieving a mixture of yellow mud, fermented cow dung, vermiculite, peat, and fermented biomass to obtain a main material, adding water to obtain a hydrated main material; fertilizing, acidifying, and adding a fungicide to the hydrated main material to form a breathable seedling-raising substrate; laying subsoil in seedling trays, covering with soil after sowing, watering thoroughly, and then stacking the seedling trays together; placing the seedling trays at a temperature of 30-32°C and a relative humidity of 90% or higher for emergence; and placing the seedling trays on a seedling board under constant temperature and humidity for emergence when the buds reach 0.5 cm in length. The present invention solves the problem of inconsistent emergence times during transplanting and raising rice seedlings in existing rice transplanting machines, resulting in uneven seedling heights and disease in the seedlings. The method of the present invention not only ensures rapid and uniform seedling emergence, but also provides a strong guarantee for cultivating strong seedlings and increasing production and efficiency.

The invention relates to a filter drain (20) for draining fluid from a subsoil, wherein the filter drain comprises: an outer pipe (21) for insertion into the subsoil, wherein the outer pipe comprises an outer pipe circumferential wall (22) with a filter drain inlet (25) for receiving the fluid from the subsoil; an inner pipe (31) inside the outer pipe, wherein the inner pipe and the outer pipe together bound a fluid receiving channel (35) that is in fluid communication with the filter drain inlet, and wherein the inner pipe internally bounds a drainage channel (36) for evacuation of the received fluid; and a floater assembly (50) inside the outer pipe, wherein the floater assembly comprises a fluid passage device (51) with a fluid inlet opening (59) between the fluid receiving channel and the drainage channel, and a floater (70) that is moveable in a moving direction with respect to the fluid passage device between a draining position and a closing position, wherein in the draining position a fluid passage is present from the fluid receiving channel to the drainage channel via the fluid inlet opening, and wherein in the closing position said fluid passage is blocked.

1. Device (10) for vibration-free deep foundations of foundations for noise and visual protection structures. 1.1. A device (10) for vibration-free deep foundations of building foundations, in particular for noise and visual protection structures, comprising a cylindrical steel tube serving as a foundation tube (11) for insertion into a subsoil intended for the foundation, with a first open end (12) in the working direction (20) and a second free open end (13) arranged diametrically spaced therefrom, wherein a cutting mechanism (26) is arranged at the first free open end (12) such that soil material can be guided into the foundation tube (11) and removed at the second free open end (13), thereby substantially maintaining the original bulk density of the in situ subsoil surrounding the foundation tube (11), and the cutting mechanism (26) comprises at least two cutting plates (14, 15, 21, 22) arranged radially outwardly on the outer circumference of the steel tube,which have ends that are angled relative to the axis of the foundation pipe (11) and arranged at a distance from one another. 1.2. Method for vibration-free deep foundations of foundations for noise and visual protection structures with the device (10) for vibration-free deep foundations of foundations for noise and visual protection structures.

The utility model provides a sandy gravel bottom layer pile foundation cleaning tool, and relates to the technical field of pile foundation cleaning, the sandy gravel bottom layer pile foundation cleaning tool comprises an extraction pipe, the outer surface of the extraction pipe is provided with a first gas transmission assembly and a second gas transmission assembly, the first gas transmission assembly is connected with a plurality of first nozzles, and the second gas transmission assembly is connected with a plurality of second nozzles; the second spray head, the first spray head, the first air conveying assembly and the second air conveying assembly are matched with one another to be used for conveying compressed air into the pile foundation so that the compressed air can turn over mud. The cleaning tool can be matched with an existing air compressor, so that the air compressor conveys compressed air into the pile foundation through a first air conveying assembly, a second air conveying assembly, a second spray head and a first spray head, effective stirring of slurry is achieved, and the stirring effect enables the slurry to be more evenly distributed in a hole; the pumping efficiency of the slurry pump is improved, scattered muck can be promoted to be mixed with the slurry, and therefore the cleaning effect is greatly enhanced.

The invention provides a foundation pile low-strain reflection wave method test method, and belongs to the technical field of pile foundation detection. The method comprises the following operation steps: S1, building a column-bearing platform-pile soil system three-dimensional dynamic model under a rectangular coordinate system according to an elastic theory; s2, a pile, a bearing platform, a column, soil around the pile and soil at the bottom of the pile are regarded as isotropic linear elastomers, physical power is not considered, and system dynamic response is solved based on an elastic wave equation; s3, analyzing the influence of different excitation force positions and different vibration pickup positions on the speed response curve; s4, verifying the correctness of the theoretical model by comparing the numerical calculation curve with the actual measurement curve, and applying the theoretical model to engineering practice to assess the completeness of the foundation pile. Through three-dimensional theoretical innovation, test technology optimization and engineering verification, the accuracy, reliability and practicability of low-strain detection of the column-bearing platform-pile system are comprehensively improved; an effective technical solution is provided for foundation pile integrity evaluation under complex conditions, and the method has important theoretical value and engineering application prospects.

The Coastal INTERBLOC Unit and the Coastal INTERBLOC Reinforced Medium Variable Geometry Variable Density Modular Revetment System, represent a flexible revetment system designed to: be vertical or sloping, incorporate one or several slopes, be straight or curvilinear; be constructed on competent or soft sub-soils; absorb wave energy by virtue of its high void porosity ratio; be installed using manual labor and light construction equipment; settle differentially without structural or functional distress; be transported cost efficiently in containers; be space efficient in transport; be scaled up or scaled down to suit the coastal energy environment; be theoretically analyzed through numerical modelling; and which can co-exist with any coastal riverine or reservoir environment and which can be adapted for installation in any variety of seabed or subsoil conditions.

A water barrier inhibits flow of water through water permeable subsoil. The water barrier includes a mixture of bacteria such as sporosarcina pasteurii that when combined with water and salt reacts with CO2 to build limestone. The water barrier is created by providing a mixture that can fill voids in a water permeable subsoil and introducing the mixture into the water permeable subsoil to fill voids. The mixture is introduced by creating a passage through the water permeable subsoil layer and pumping the mixture into the passage.

The invention discloses a molybdenum tailing harmless treatment and functional soil dressing preparation method based on a geopolymer, the curing rate of sulfides in molybdenum tailings can be increased to 95% or above through a three-dimensional network structure formed by the geopolymer, and generation of acid wastewater and migration of pollutants are thoroughly blocked; the pH value of the prepared alien soil is stabilized at 7.0-8.5 (neutral and slightly alkaline), the compressive strength of 7 days is larger than or equal to 0.5 MPa, the compressive strength of 28 days is larger than or equal to 1.0 MPa, the water retention rate is larger than or equal to 60%, and the prepared alien soil can adapt to multiple purposes such as mine area regreening, slope protection and farmland improvement according to scene requirements, and meets the requirements of vegetation growth and engineering stability. The technology of using local materials and preparing at normal temperature is adopted, high-temperature calcination is not needed, the treatment cost is reduced by 30%-50% compared with that of traditional landfill, foreign soil can be applied nearby, the long-distance transportation cost is avoided, and economic benefits are remarkable. Solid waste is used as a main raw material of the soil dressing, carbon emission is reduced by 60% or above compared with that of traditional soil dressing, acid soil can be improved, the double-carbon target and the ecological restoration concept are met, and environmental benefits are outstanding.

The utility model relates to agriculture and can be used for seasonal subsurface irrigation of trees, primarily in areas with sandy loam and sandy soils under conditions of extremely high temperatures and water shortages. The subsurface irrigation device, which includes a tank and a protective screen, according to the utility model, features a tank mounted in a permeable casing with a layer of black soil at the bottom. The tank, within the casing, is mounted on a waterproof protective screen made of bentonite or clay. The tank has a tube at the bottom for delivering water to the plant's rhizome. The top of the tank is equipped with a protective ring made of porous concrete, painted a reflective color. A light indicator connected to a float is installed in the neck of the tank.The device is equipped with a synthetic fabric cord placed in a tube to deliver water to the plant's rhizome for capillary irrigation. The cord's outlet end is connected to a geotextile skirt located around the rhizome. This subsurface irrigation device provides the required irrigation rate in sandy and sandy loam soils, maximizing the use of irrigation water for the irrigated tree's root system.

The utility model discloses a waterproof art retaining wall which mainly comprises a foundation raft plate, a concrete wall body, an inclined strut structure and a tie bar. The foundation raft plate is poured on a hard stratum, the concrete wall body is poured on the foundation raft plate, and a high soil layer and a subsoil layer are arranged on the two sides of the wall body respectively. The inclined strut structure, the foundation raft plate and the concrete wall body are integrally poured, and the inclined strut is arranged on one side of the subsoil layer and buried under the subsoil layer in a covering mode. The fixed section of the tie bar is fixed in a concrete wall body, the extending section of the tie bar is obliquely and downwards buried in a high soil layer, and the fixed section is fixedly connected with a buckling piece. The waterproof layer is arranged between the concrete wall body and the high soil layer, so that water permeation is effectively prevented. And the decorative plate is fixed on the wall body through the fastener and is arranged on one side of the subsoil layer, so that the appearance is improved. The waterproof art retaining wall is suitable for complex terrains and high soil layer environments, and has high adaptability, stability and a good visual effect.

A three-dimensional network drainage salt control and alkali discharge method and system, the method comprising the following steps: laying a soil improvement salt control and alkali discharge channel in a subsoil layer of the saline-alkali soil to be improved for discharging saline-alkali water in the topsoil layer and the subsoil layer from the soil body; laying a hidden passage salt control and alkali discharge channel in a bottom soil layer of the saline-alkali soil to be improved for discharging saline-alkali water below the subsoil layer and discharging the upward saline-alkali water when the saline-alkali water upwardly returns below the bottom soil layer; and drilling a vertical shaft salt control and alkali discharge channel in a micro-domain alkali spot area of the saline-alkali soil to be improved for opening a water-permeable alkali discharge channel from the topsoil layer, the subsoil layer to the bottom soil layer. The invention also provides a three-dimensional network drainage salt control and alkali discharge system constructed by using the above method. The invention improves the number of drainage channels, improves the drainage efficiency, prolongs the service life, reduces the construction cost, and solves the problem of difficulty in discharging salt in the micro-domain hard alkali spot block area where the saline-alkali water upwardly returns.

The present invention relates to saline-alkali soil improvement technology, and in particular to an improvement method for constructing a stable water supply and salt drainage channel for soda saline-alkali soil, comprising the following steps: 1) digging a ditch; 2) pre-treatment of filter materials; 3) filling of filter materials; and 4) in-situ covering operations. The present invention proposes a complete set of physical improvement schemes for the subsoil layer of saline-alkali soil, from ditching, pre-treatment of filter materials to deep burial filling, to improve the subsoil layer of soda saline-alkali soil. Unlike conventional soil improvement methods that only target the topsoil layer, the present invention focuses on the permeability of the subsoil layer, as this helps to improve the connectivity and salt drainage efficiency of each soil layer. Through deep ditch opening and filter material filling technology, a stable water supply and salt drainage channel is established in the subsoil layer, thereby achieving effective connectivity between the subsoil layer concealed pipe and the topsoil layer, further improving the overall salt drainage and improvement efficiency of saline-alkali soil.

A water barrier inhibits flow of water through water permeable subsoil. The water barrier includes a mixture of bacteria such as sporosarcina pasteurii that when combined with water and salt reacts with CO₂ to build limestone. The water barrier is created by providing a mixture that can fill voids in a water permeable subsoil and introducing the mixture into the water permeable subsoil to fill voids. The mixture is introduced by creating a passage through the water permeable subsoil layer and pumping the mixture into the passage.

The present application relates to the technical field of mine ecological restoration, and discloses a sandy mudstone composite guest soil based on geopolymer and a preparation method and application thereof, aiming to solve the problems of pollution caused by accumulation of solid waste of sandy mudstone in open-pit coal mines, low resource utilization rate, lack of guest soil for ecological restoration in mining areas, poor water and fertilizer retention, and weak erosion resistance. The present application takes the sandy mudstone in open-pit coal mines as the core aggregate, and is compounded with a complex geopolymer cementing material, an alkaline activator, a modified functional agent, and a water and fertilizer retention component. After treatment, the compressive strength reaches about 2 MPa, and then the product is made into a finished composite guest soil by a breaker and a pulverizer. The finished guest soil has good bulkiness and excellent biocompatibility, and has the abilities of stable water and fertilizer retention and anti-loss performance. The raw materials are locally sourced, the preparation process is simple, and the finished product can be directly applied to ecological restoration in areas such as goaf, dump, and slope in open-pit coal mines, so as to achieve the dual goals of on-site disposal of solid waste and ecological restoration.

The invention relates to the technical field of agricultural planting. The invention provides a winter rape straw mulching no-tillage direct seeding planting method which comprises the following steps: (1) collecting straws on the earth surface of a to-be-planted area, ditching on the earth surface of the to-be-planted area, and constructing a planting bed; (2) precisely sowing on the planting bed, and covering the straw collected in the step (1) on the surface. The three-layer structure of the subsoil layer, the seed layer and the straw covering layer is innovatively constructed, and the problem of'high seedlings' caused by seed suspension in the traditional straw returning mode is effectively solved. According to the method, the straw covering layer is used for preserving heat and soil moisture and inhibiting weed and bird damage, meanwhile, the subsoil layer is used for ensuring that seed implantation is stable, the emergence rate and the overwintering survival rate of the oilseed rape are remarkably increased, and cooperation of straw resource utilization and high yield and high efficiency of the oilseed rape in the rice-oil rotation cropping mode is achieved.

A lawn irrigation system with a draining subsoil and water recycling, characterized by comprising an irrigation subsystem (5) and a multi-layered subsoil formed, from top to bottom, by a substrate layer (2); a sand layer (3); a mixed filter layer formed by a biochar layer (6), a zeolite layer (7), a gravel layer (8), and a separating geotextile (4) between them; a drainage sheet (9); and an impermeable layer (11), the impermeable layer (11) being inclined towards one or more reservoirs (12).

The present disclosure provides a sand soil large-diameter pile foundation P-Y curve correction method and system, the scheme comprises: dividing the sand soil foundation into several subsoil layers, obtaining the sand soil internal friction angle, soil effective gravity of each subsoil layer and vertical depth from the mud surface at the middle height of each subsoil layer based on geological exploration; based on the obtained internal friction angle and the expression in the API specification P-Y curve method, the correlation coefficient is calculated; based on the soil effective gravity, vertical depth and correlation coefficient, the standard value of the limit horizontal soil resistance of each subsoil layer per unit pile length is obtained; based on the load characteristics and the preset cycle number, the correction coefficient is determined, and the initial modulus of the foundation reaction force is calculated based on the internal friction angle; based on the limit horizontal soil resistance standard value, correction coefficient and initial modulus of foundation reaction force, the P-Y curve of each subsoil layer after correction is obtained; based on the obtained P-Y curve and the finite element simulation analysis software, the deformation analysis of the horizontal bearing pile is realized.

The transformation of seabed sediments into organic sludge is a serious problem, both in improving the water environment of enclosed sea areas through sediment improvement and in river dredging as a flood control measure. Japan's organic sludge disposal sites are controlled facilities, and their remaining capacity is becoming critical. Constructing new disposal sites requires enormous project costs and construction time. [Solution] The solution of this invention involves forming a subsoil improvement layer on the seabed by consolidating the surface layer of the organic sludge using a rapid vacuum consolidation method, thereby increasing its density and strength, and stabilizing it on the seabed. Substances that cause water pollution in the subsoil are forcibly dissolved by consolidation wastewater to form an impermeable improved soil layer, which then seals in the organic sludge below. Meanwhile, the wastewater containing pollutants is properly treated. By forming an even more effective impermeable improved soil layer instead of permeable sand capping, a sustainable and healthy aquatic environment is restored without the need for sand capping materials or the generation of dredged soil.

Device (10) for deep foundations of structures, in particular for noise and visual barriers, comprising a cylindrical steel tube, which serves as a foundation tube (11) for vibration-free insertion into a subsoil intended for the foundation, with a first open end (12) in the working direction (20) and a second free open end (13) arranged diametrically apart from it, wherein a cutting device (26) is arranged at the first free open end (12) such that soil material can be directed into the foundation tube (11) and removed at the second free open end (13) and thereby the original density of the in situ subsoil surrounding the foundation tube (11) can be substantially maintained, and the cutting device (26) comprises at least two cutting plates (14, 15, 21, 22) arranged radially outside the outer circumference of the steel tube,the ends of the foundation pipe (11) are arranged at an angle to the axis of the foundation pipe (11) and spaced apart from each other, characterized in that the cutting unit (26) comprises cutting plates (14, 15, 21, 22) arranged on the outside (16) of the foundation pipe (11), which have an angle of attack relative to the inner axis of the foundation pipe (11) depending on the soil to be founded, which is essentially preset by the density of the soil to be founded.

The present application relates to a method for raising and resetting the subsided foundation of a plant in deep-lying workshops, belongs to the technical field of foundation settlement resistance and correction, and comprises: S1: Determination of the pressure diffusion angle of the subsoil based on the ratio of the compression modulus of a load-bearing layer and an underlying layer, namely ES1 / ES2, as well as the value of Z / b; S2: Determination of the load diffusion zone based on the pressure diffusion angle of the subsoil; S3: Grouting and stabilizing the unstable soil in the soft underlying layer according to the load diffusion zone to form a grouted and stabilized body; S4: Grouting and stabilizing the load-bearing layer according to the load diffusion zone, arranging grouting holes in two triangular areas along the lines of the pressure diffusion angle, the grouting holes being distributed on both sides of the plant foundation;S5: Grout reinforcement in the middle area of ​​the load-bearing layer for lifting; S6: Construction of an irregular composite foundation support structure at the base of the soft underlying layer. The present application enables a deep reinforcement of the foundation in order to save material while simultaneously ensuring the requirements for permanent settlement stability of the foundation and achieving the corrective effect.

The utility model discloses an expanding drill bit, which relates to the technical field of building construction foundation piles and comprises an expanding device mounted on a core tube. Part of the expanding device can obliquely extend to the outer side of the core tube; the expanding device rotates along with the drill bit, and the bottom end of the expanding device rotates to the part outside the outer diameter range of the spiral blade I and simultaneously cuts a hole wall rock-soil body so as to realize expanding; the expanding device is provided with an oil cylinder, a shaft II, a yoke plate, a shaft III, a hollow connecting rod, a locking pin, a shaft IV and an expanding body; according to the expanding drill bit, the displacement sensor is arranged on the oil cylinder, the expanding size is monitored and determined in real time, the stability of the expanding amount of a construction pile type is guaranteed, and digital construction is achieved; the oil cylinder of the expanding device in the expanding drill bit is arranged in the closed cavity of the drill bit, so that the service life is long; the expanding drill bit can be used for cast-in-place pile construction of re-compaction concrete, and compaction of pile subsoil is achieved; the expanding body in the expanding drill bit can be screwed out of various sizes, pile types of pile sections with different expanding diameters can be formed, and optimization design is facilitated.

The invention discloses a double-layer soil structure-based engineering residue soil filling body ecological improvement method, which comprises the following steps: S1, preparing a surface soil layer soil material: selecting sandy loam soil or clay loam soil in engineering residue soil as a surface soil main body, adding bagasse into the surface soil main body, and mixing the surface soil main body with the bagasse to obtain the surface soil layer soil material; s2, preparing a subsoil layer soil material: selecting clay loam soil in engineering residue soil as a subsoil main body, adding xanthan gum into the subsoil main body, and mixing the subsoil main body with the xanthan gum to obtain the subsoil layer soil material; s3, the subsoil layer soil material is laid on the surface of the engineering muck filling body to form a subsoil layer structure; s4, the subsoil layer is subjected to compaction treatment; and S5, the surface soil layer soil material is laid on the surface of the subsoil layer to obtain a surface soil layer structure. The problems of water and soil loss and ecological function deficiency of the engineering muck landfill can be effectively solved through a synergistic mechanism of coupling plant root system soil fixation, bagasse water retention reinforcement and xanthan gum impermeability.

This application discloses a tree planting structure for arid areas, characterized by comprising: a water storage pit extending downward from the soil surface; a tree pit disposed below and connected to the water storage pit; a moistened water layer comprising a moistened subsoil or sand layer; a sapling buried in the tree pit, the sapling having a downward-pointing taproot; a hydrophobic membrane formed by coating the water storage pit with a hydrophobic material; soil filling the tree pit, and granular material filling the water storage pit; and a water collection tray covering the granular material. The present invention provides long-term water replenishment and effectively improves the survival rate of saplings.