56 results about "Rammed earth" patented technology

The invention discloses a chitin-silicon-calcium-based modified material for rammed earth wall repair and a weather resistance evaluation method thereof, and belongs to the technical field of rammed earth wall repair, the chitin-silicon-calcium-based modified material comprises metakaolin, calcium oxide, quartz and chitin; the ratio of chitin to metakaolin to calcium oxide to quartz is 1: 1: 2: 4; the method comprises the following steps: pre-treating at the earlier stage of a test, evaluating freeze-thaw cycle performance, evaluating dry-wet cycle performance, evaluating salt corrosion resistance, analyzing association between a microstructure and a strength performance, and finally, revealing a material degradation rule and mechanism by combining scanning electron microscope observation, unconfined compressive strength test and crack rate analysis. When the freezing and thawing cycle number N is less than or equal to 5, the dry and wet cycle number I is less than or equal to 9, and the salt solution concentration c is less than or equal to 0.3 mol / L, the characteristics of freezing and thawing resistance, dry and wet resistance, salt erosion resistance and the like of the modified material are obviously improved; after the modified material is added, internal pores of plain soil can be filled, unconfined compressive strength of a soil body is enhanced, and long-term durability of the soil body is improved.

The invention relates to the technical field of building physics and artificial intelligence crossing, and discloses a traditional village dwelling thermal performance prediction system based on deep learning, comprising a data acquisition module for acquiring solar radiation, wind speed and direction, internal and external pressure difference and indoor and outdoor temperature; the radiation decoupling network module is used for predicting the net radiation heat flux of the outer surface according to the solar radiation, the sun position and the component posture; the microclimate permeation network module is used for predicting a convective heat transfer regulation factor according to the pressure difference, the wind and the opening state; the implicit state network module adopts a circulation structure and introduces an implicit thermal state vector to represent the thermal inertia of the enclosure structure; and an indoor thermal environment integration module that integrates the convective heat flux based on the heat balance and outputs an indoor air temperature predicted value. According to the system, through decoupling modeling of radiation, permeation and heat transfer of the enclosure structure, prediction interpretability of the indoor thermal environment of a traditional dwelling is improved, and the system is suitable for building scenes which are built with non-standard materials such as rammed earth and depend on natural ventilation.

The utility model relates to the technical field of rock and soil tamping, one embodiment of the utility model provides a rock and soil tamping device for geotechnical engineering, the rock and soil tamping device comprises a base, a fixing frame, a tamping mechanism and a reinforcing assembly, a plurality of driving wheels are mounted on the base, a mounting groove is formed in the base, the bottom end of the fixing frame is fixedly connected with the inner wall of the mounting groove, and the bottom end of the fixing frame is fixedly connected with the inner wall of the mounting groove; the tamping mechanism is arranged in the fixing frame and used for continuously tamping rock soil, and the reinforcing assembly is arranged on the outer side wall of the fixing frame and used for reinforcing the stability of the base and the rock soil. By means of the technical scheme, the technical problems that in the automatic and continuous compaction process of rock and soil in the prior art, the earth ramming plate and the rock and soil collide, the earth ramming plate and the rock and soil can generate opposite impact force, and the whole device may shake and is insufficient in stability are solved.

A predictive method for quantifying the degree of erosion damage in rammed earth cultural relics, relating to the field of cultural relic protection, involves acquiring 3D laser point cloud data and close-up photogrammetric 3D model data of the rammed earth relics; fusing the 3D laser point cloud model and the close-up photogrammetric 3D model to construct a three-dimensional model of erosion damage in the rammed earth relics; extracting quantitative indicators of erosion damage development based on the three-dimensional model of erosion damage in the rammed earth relics, constructing and optimizing a predictive model of erosion damage development; and generating and outputting a quantitative report on the degree of erosion damage development in the rammed earth relics. This invention combines 3D laser scanning and close-up photogrammetry, designs differentiated flight paths for different height areas, aligns the cross-sectional contours of different models based on Fourier description, and uses Poisson surface reconstruction technology combined with a hole-filling algorithm to complete the missing parts of the model, intuitively presenting the spatial distribution and morphological characteristics of erosion damage, quantifying the changing patterns of erosion damage over time, and promoting a shift in protection work from passive restoration to proactive prevention.

This invention relates to the field of building repair, and its purpose is to provide a rammed earth wall reinforcement structure, comprising a strip foundation, a rammed earth wall, and several semi-prefabricated reinforcement units. Several interlocking cavities are provided at both the front and back connections of the strip foundation and the rammed earth wall. The interlocking cavities at the front and back connections are alternately distributed along the length of the strip foundation. Each semi-prefabricated reinforcement unit corresponds to one of the interlocking cavities and includes a concrete block and a steel reinforcement cage. The concrete block seals the opening of the interlocking cavity and forms a cast-in-place bonding zone with the interior of the cavity. One end of the steel reinforcement cage is embedded in the concrete block, and the other end extends into the cast-in-place bonding zone. A grouting port communicating with the cast-in-place bonding zone is provided at the bottom of the concrete block, and grout is injected into the cast-in-place bonding zone. This invention can effectively reinforce the rammed earth wall and its foundation while maintaining the original structural appearance of the rammed earth wall and its foundation.

The application provides a label-based multi-modal cultural relic knowledge graph construction method, system and device, relates to the technical field of cultural relic knowledge graph construction, and obtains multi-spectral image and texture image multi-modal data of a target rammed earth cultural relic, analyzes the multi-spectral image by relying on a pre-constructed standard reflection spectrum database of rammed earth materials, obtains material composition characteristics of each spatial region, and then generates material and topographic feature vectors by correlating corresponding texture images. Then, the vectors are mapped to initial features of graph network nodes, and updated aggregated features are obtained through iterative propagation and aggregation, and a composite label containing material attributes, disease types and spatial positions is generated accordingly, and finally, a target rammed earth cultural relic knowledge graph is constructed based on all composite labels, multi-modal data fusion of the rammed earth cultural relic can be realized, the composite label can be accurately generated and the knowledge graph can be constructed, and the application helps the systematic management and application of cultural relic information.

The present application belongs to the technical field of combined plate cable anchor cable backfill soil rammer, and discloses a combined plate cable foundation hole body backfill soil ramming device and method, the combined plate cable foundation hole body backfill soil ramming method comprising: combined plate cable foundation pile pit backfill soil, adopting layered paving; according to the compaction degree change law after the hole body backfill soil ramming, controlling the thickness of each layer, the ramming times of each layer and the height of the rammer falling distance each time; the hammer should be kept stable, and the ramming position is accurate. The present application can realize the ramming compaction of the backfill in the hole body, can overcome the shortcomings that the existing flat bottom rammer is easy to tilt and ramming deviation, and the ramming quality is not easy to guarantee, and improves the ramming efficiency. In addition, the through hole arranged in the middle not only can ensure the smooth passing of the combined plate cable main anchor, but also is more conducive to emptying the air wave through the air hole and reducing the air wave generated in the falling process of the rammer. Layered ramming can ensure that each layer of rammed soil reaches the designed compaction degree.

The invention discloses a high-solid-waste-content soft porcelain material suitable for pavements as well as raw materials and a preparation method thereof, and relates to the technical field of soft porcelain materials. The high-solid-waste-content soft porcelain material suitable for the pavement comprises a bottom-layer raw material and a surface-layer raw material, wherein the bottom-layer raw material comprises coupling-agent-modified rammed earth, a graphene-oxide-modified first emulsion, a second emulsion, water, a dispersing agent, a curing agent, a coalescing agent and a water reducing agent; the surface layer is prepared from the following raw materials: inorganic powder, modified rubber particles, graphene oxide modified first emulsion, second emulsion, water, a dispersing agent, a coupling agent, a curing agent, a coalescing agent and a water reducing agent. By adopting the raw material of the soft porcelain material provided by the invention, the accumulation of solid waste materials such as rammed earth, granite and waste rubber can be reduced, the multifunctionality of the soft porcelain material is increased, and the prepared soft porcelain material has the characteristics of hard bottom and soft and moist surface, can be applied to a road surface, and can be directly paved on the road surface after being prepared, so that the construction period is greatly shortened.

The application discloses a kind of earth ruins rammed reinforcement engineering intelligent detection device and detection method, infrared ranging unit is used to gather rammed surface soil thickness and ramming thickness data, data acquisition unit receives ranging data and is transmitted to operation processing unit, and operation processing unit calculates soil thickness and ramming degree by preset algorithm, and determination trigger unit compares test calculation result with preset qualified threshold, and triggers sound light feedback unit to realize green light qualified display or red light alarm.The application realizes the operation of non-contact detection, automatic calculation, instant determination and on-site feedback of soil thickness and ramming degree, adapts to the construction requirements of low disturbance of earth ruins ramming, has high detection accuracy and is easy to operate, can construct construction management of detection, determination, construction correction and process connection, effectively guarantees the construction quality of earth ruins ramming reinforcement engineering, and improves construction progress.

The invention relates to the technical field of buildings, and discloses a rammed earth wall construction formwork and a construction method, and the rammed earth wall construction formwork comprises a clamping assembly and a pressurizing assembly; the clamping assembly comprises two face plates oppositely arranged in the second direction, and the two face plates are arranged on the two sides of the rammed earth wall correspondingly and attached to the rammed earth wall. The pressurizing assembly comprises a main beam, a secondary beam and an opposite-pulling structure, the main beam and the secondary beam are arranged corresponding to the panel, the main beam extends in the third direction, the secondary beam extends in the first direction, and the opposite-pulling structure extends in the second direction; the secondary beams are arranged between the panels and the main beams, and the two ends of the opposite-pulling structure are connected with the two main beams correspondingly; through the multiple main beams and the multiple secondary beams which are arranged in a staggered mode, stress on the face plate is more balanced, the whole formwork structure stability is higher, meanwhile, the hoisting steel bars are matched with the secondary beams, the formwork transferring efficiency is improved, and then the construction efficiency of the rammed earth wall is improved.

The utility model discloses an immature soil building reinforcing structure, which belongs to the technical field of ancient building reinforcement and comprises a wood frame component and a reinforcing and leveling component, the wood frame component is positioned in an immature soil building and is tightly attached to the inner surface of a wall, and the reinforcing and leveling component is positioned in the immature soil building. The wood frame assembly comprises a plurality of wood constructional columns, column foundations fixedly connected with the lower portions of the wood constructional columns and wood beams connected with the upper portions of the wood constructional columns in a mortise and tenon joint mode, the reinforcing and leveling assembly is located between the wood frame assembly and the inner surface of the wall body, the wood plates are tightly attached to the inner surface of the wall body, and the wood tips penetrate through the wood constructional columns to be fixed to the wood plates. And grass mud is filled between the wood boards and the wood constructional columns. By arranging the wood frame assembly, the effect that the wall falls down and the house does not collapse is achieved, meanwhile, in order to guarantee effective supporting between the inner surface of an original wall and the wood frame assembly, the reinforcing and leveling assembly is arranged, the wood plates and the wood constructional columns are fixed through wood tips, the space between the wood plates and the wood constructional columns is filled with grass mud, and the integrity between the wood plates and the wood constructional columns is enhanced.

The application discloses a coiled tubing drilling downhole system convenient to move and position, which comprises a bottom plate, four through grooves are formed through the bottom of the bottom plate, four universal wheels are arranged on the bottom of the bottom plate, a handle is fixed to one side of the top of the bottom plate, a supporting frame is arranged above the bottom plate, four square tubes are fixed to the supporting frame, a positioning and stabilizing assembly is arranged in each of the square tubes, a traction roller is rotatably connected to the inside of the supporting frame, and a first motor is fixed to one side of the supporting frame. The application relates to the technical field of oil exploration. The coiled tubing drilling downhole system convenient to move and position is provided with an automatic tamping mechanism, which can automatically tamp the soil and gravel divided to the two sides of a drilling hole, cooperates with an automatic soil dividing assembly to avoid the loose soil and gravel around the drilling hole from sliding into the drilling hole, and thus improves the drilling efficiency.

The application relates to the technical field of building construction, and discloses a forming method of a rammed earth city wall and an auxiliary mold frame thereof. The forming method of the rammed earth city wall and the auxiliary mold frame thereof comprise the following steps: selecting a soil sample; building a mold frame; and filling and ramming in layers. The mold frame unit comprises an end plate, an aluminum mold frame I, an aluminum mold frame II, a steel plate frame fixedly installed on the aluminum mold frame II, and a positioning unit arranged at the bottom of the aluminum mold frame I and the aluminum mold frame II. The forming method of the rammed earth city wall and the auxiliary mold frame thereof are characterized in that the bolts connected between the aluminum mold frame I and the aluminum mold frame II are removed, and the aluminum mold frame I and the aluminum mold frame II are adjusted in position under the action of the steel plate frame, so that the mold frame unit can be smoothly transferred. The positioning unit is used to keep the mold frame unit in a stable state during ramming, so that the mold frame unit cannot move during ramming, and the straightness of the rammed city wall can be effectively known by observing the contact position of the steel rod frame and the shaft-shaped supporting part.

This utility model discloses a rammed earth machine for building construction, relating to the field of building construction technology. The rammed earth machine includes a frame, a traction motor, and a U-shaped transmission plate. A support plate is fixedly installed on the top of the frame; a ramming plate is mounted on the support plate, and the traction motor drives the ramming plate to rise. Through the setting of a guide stabilizing rod, the ramming plate can be guided during its descent, thus determining the landing point of the ramming plate. This not only ensures the ramming plate lands accurately on the ramming location but also prevents the ramming plate from shifting and causing injury to workers, thereby improving the practicality of the device. Furthermore, the drive motor can move an L-shaped lifting plate, which, after movement, allows the ramming plate to be lifted via a U-shaped connecting plate. This design reduces worker involvement, lowers labor intensity, and further improves the safety of the device.

The invention discloses a construction method of weather-resistant artistic rammed earth paint. The construction method comprises the following steps: leveling a wall surface base layer and applying putty; constructing a first layer of primer on the surface of the putty to seal a base layer and prevent alkaline substances from overflowing; constructing a second layer of primer on the surface of the first layer of primer for enhancing the adhesive force of the middle layer of paint; snapping line division is conducted on the wall surface, and a plurality of construction cells are formed on the wall surface; middle-layer paint is scraped in each cell in batches so as to meet the design art requirement; and finish-coat paint is constructed on the surface of the middle-layer paint and used for protecting the middle-layer paint, through the construction method, the overall weather resistance and durability of the rammed earth paint are improved, and the service life is prolonged.

The utility model discloses a device for safely storing CNG (compressed natural gas), which belongs to the technical field of natural gas storage and comprises a vertical tank and a horizontal tank, the bottom of the vertical tank is welded with the top of the horizontal tank, and the vertical tank and the horizontal tank are internally communicated. A vertical well is formed on the periphery of the vertical tank, and a horizontal well is formed on the periphery of the horizontal tank; a safety operation mechanism is arranged at the top of the vertical tank; according to the utility model, the vertical tank and the horizontal tank which are made of 16Mnr special steel are combined and welded, the outer wall of the tank body adopts three-PE (Poly Ethylene) for corrosion prevention, and the foundation at the periphery of the tank body is mounted by tamping and wrapping concrete, so that the mounting cost and the manufacturing cost are effectively reduced and are only 20% of the manufacturing cost of similar products; according to the utility model, the vertical shaft device is reasonably added, the reserve is greatly increased, the purpose of quantity storage peak regulation is completely realized, and the economic benefits of operators are increased.

The application relates to the field of wall painting technology, in particular to a weathered rammed earth painting device, which comprises a handle, the end of the handle is fixedly connected with a connecting block, the connecting block is fixedly connected with a fixing frame, the fixing frame is fixedly connected with two groups of fixing pipes, the fixing pipes are rotationally connected with rotating pipes, the outer side of the rotating pipes is sleeved with painting rollers, the end of the fixing pipes is connected with a communicating piece installed in the fixing frame and the handle, paint is delivered to the painting rollers through the delivery pipe, and the communicating piece and the rotating piece are used to deliver the paint when working and stop delivering the paint when not working, so that the problem that the paint on the painting roller is too much to drop and be wasted due to repeated dipping of the painting roller in the prior art is solved.

This invention discloses a moisture-regulating high-strength modified rammed earth wall system and its preparation method suitable for hot-summer, cold-winter regions, belonging to the field of green building materials and building construction technology. This invention aims to solve the problem that existing rammed earth walls in hot-summer, cold-winter regions cannot simultaneously meet the requirements of high mechanical performance, excellent water resistance and durability, and active dynamic moisture regulation. The wall system of this invention is a three-layer composite structure consisting of a moisture-regulating functional layer, a high-strength, water-resistant rammed earth base layer, and a breathable protective finishing layer, arranged sequentially from the indoor side to the outdoor side. It is quantitatively designed using a strength-density synergy model and an effective moisture-regulating capacity formula, and is prepared through mixture preparation, digital ramming, controlled curing, and high-precision construction of the functional layers. This invention overcomes the technical bottleneck of traditional rammed earth walls, which struggle to simultaneously achieve strength, moisture regulation, and waterproofing, retaining the green and low-carbon ecological advantages of earthen buildings while meeting the dual requirements of modern architecture for structural safety and user comfort.

A reinforcement device for correcting alignment of a wok ear rammed earth wall includes: a wok ear reinforcing structure including a strip-shaped fixing plate, of which side fixing plates are spaced apart on each of both sides, and an end of each of the side fixing plates is provided with a first connecting ring; a rammed earth wall reinforcing structure including triangular fixing frames, side leg support columns, and a main support column. The triangular fixing frames on both sides of the wok ear respectively extend to form L-shaped connecting bars symmetric to each other, the ends are correspondingly welded together to form a surrounding integral structure. A second connecting rings and the first connecting rings are welded by rigid connecting plates. The original appearance of the wok ear rammed earth wall can be ensured with less destruction, improvements of structural strength, stability, and anti-falling ability.

The utility model provides a kind of artificial old pit mud temperature control culture fermentation tank, its technical scheme is: including concrete layer, three groups of concrete layer constitute the fermentation space of U type, gap is entrance, the inside of concrete layer is embedded with foaming layer, the bottom of fermentation space is successively provided rammed earth base layer, heat preservation layer and heating layer from below to above.The utility model has beneficial effect: (1) temperature control: in-15 ℃ external environment, the constant temperature of 37±1 ℃ in fermentation space maintains length of time to 18 hours / day, and compared with traditional floor heating system, energy saving 42%;(2) microbial activity: caproic acid bacteria biomass reaches 8.7×10⁷CFU / g (compared with conventional fermentation tank, increase 2.3 times), bacterial flora space distribution uniformity improves 67%, 5~7g / kg is produced in pit mud Caproic acid;(3) operating efficiency: entrance width 8 meters, adapt mechanized device to enter and exit packing and heap material.

The embodiment of the invention relates to an assembly type immature soil wall body composite base joint, a wall body and a construction method. The assembly type immature soil wall body composite base joint comprises a base body, a groove, an air blocking groove and a through hole. The base body comprises a connecting part and a tilting fillet part; the connecting part is used for connecting the ground ring beam and the immature soil interlocking building block; the apron flashing part is located on one side of the lower portion of the connecting part and integrally connected with the connecting part, and the included angle between the upper surface of the apron flashing part and the side face of the connecting part is an obtuse angle and used for guiding the flow direction of rainwater; the groove is positioned on the top surface of the base body and is used for being connected with a convex rib of the immature soil interlocking building block in a matching manner; the air blocking groove is formed in the bottom surface of the base body, is parallel to the projection of the groove and is used for cutting off a siphon path of capillary water; the through hole is located in the base body, the axial projection of the through hole is perpendicular to the projection of the air blocking groove, and the through hole is used for containing a vertical steel bar core column.

This invention provides an indoor decorative rammed earth column casting device, comprising a decorative main frame, a base panel, a wire mesh, vertical reinforcing ribs, and a casting mold. The decorative main frame forms the internal support structure of the rammed earth column. The base panel is arranged around the periphery of the decorative main frame, and from the inside out, the base panel includes a flame-retardant board and a calcium silicate board. The calcium silicate board is surrounded by a wire mesh, which is fixedly connected to the main frame by bolts. The bottom end of the decorative main frame is installed on the ground, and a skirting board is provided around the periphery of the bottom end of the decorative main frame. The bottom casting mold is supported on the outer edge of the skirting board, and the casting mold and the base panel form a casting cavity. The casting mold and the flame-retardant board are fixedly connected by bolts. The casting mold used in this invention is made of organic transparent glass, which facilitates the adjustment of the layers, texture, and color of the rammed earth, ensuring that the ramming effect of the rammed earth layer meets the design requirements.

The invention relates to the field of building repair, and aims to provide a rammed earth wall reinforcing structure which comprises a strip-shaped foundation, a rammed earth wall and a plurality of semi-prefabricated reinforcing units. A plurality of embedding cavities are formed in the front face connecting position and the back face connecting position of the strip-shaped foundation and the rammed earth wall. The embedding cavities at the front surface connecting part and the embedding cavities at the back surface connecting part are sequentially and alternately distributed along the length direction of the strip-shaped foundation; the semi-prefabricated reinforcing units correspond to the embedding cavities in a one-to-one mode, each semi-prefabricated reinforcing unit comprises a concrete embedded block and a steel bar reinforcing cage, the concrete embedded blocks are plugged at cavity openings of the embedding cavities, and cast-in-place combination areas are formed by the concrete embedded blocks and the interiors of the embedding cavities; one end of the reinforcement cage is embedded in the concrete insert block, and the other end of the reinforcement cage extends into the cast-in-place combination area; a grouting opening communicated with the cast-in-place combination area is formed in the lower portion of the concrete embedded block, and grouting materials are poured into the cast-in-place combination area. The rammed earth wall and the foundation thereof can be effectively structurally reinforced, and the original structural features of the rammed earth wall and the foundation thereof are kept.

A mine earth ramming device based on low carbon comprises a bottom plate abutting against the ground; the vibration exciter is fixedly connected to the bottom plate and located on the side, away from the ground, of the bottom plate, and the vibration exciter comprises a shell extending in the first direction and fixedly connected to the bottom plate and further comprises a rotating shaft located in the shell and extending in the first direction and an eccentric block fixedly connected to the surface of the rotating shaft; according to observation in the first direction, the rotating shaft integrally penetrates through a hollow part extending in the first direction, and the eccentric block comprises a first part fixedly connected to the rotating shaft and a second part fixedly connected to the first part and located on the side, away from the rotating shaft, of the first part. The density of the first part is denoted as D1, the density of the second part is denoted as D2, and the relational expression that D1 is larger than 0.1 D2 and smaller than or equal to 0.2 D2 is met.

The application provides a pile foundation construction method and belongs to the technical field of building construction. A, pile hole is opened; B, hole is cleaned once; C, an annular bearing gasket is put into the bottom of the pile hole, and then a spiral hole expander is lowered into the pile hole, the spiral hole expander is an elastic spiral metal sheet, the spiral metal sheet is in a conical cylinder shape with the small-diameter end upward and the large-diameter end downward in a natural state, the large-diameter end of the spiral metal sheet is pressed on the annular bearing gasket, and the outer diameter of the bottom of the spiral metal sheet is smaller than the inner diameter of the pile hole; D, the hammer of the pile machine is connected to the top of the spiral metal sheet through a cable, the small-diameter end of the spiral metal sheet is frequently hit, the large-diameter end of the spiral metal sheet extrudes the inner wall surface of the bottom of the pile hole, the diameter of the bottom of the pile hole is expanded, and the soil is rammed; E, the spiral metal sheet is taken out, and the hole is cleaned twice; F, a steel reinforcement cage is lowered and poured to form a pile foundation. The application has the advantages of high efficiency and low cost.

The application belongs to the field of cultural relic protection, and specifically discloses a 3D printing fidelity repair method and system for earthen site disease identification and fusion aging, which comprises the following steps: collecting multi-source information of a site body, performing fusion processing, outputting a standardized fusion data set, identifying diseases and quantifying parameters, constructing a virtual model of a masonry cultural relic body, dividing a masonry repair area into standard component models for numbering, saving texture parameters and repair parameters of each component model, preparing rammed earth repair pieces and masonry repair pieces, performing texture replication and gradient aging processing, assembling on a site to form a stable rammed earth-masonry composite structure. According to the technical scheme, accurate disease identification and quantification, accurate texture replication, laser modular aging, factory pre-matching and on-site accurate assembly are integrated into a closed-loop repair, a stable rammed earth-masonry composite structure is constructed, the repair fidelity and construction efficiency are improved, and secondary damage to cultural relics is avoided.

The utility model relates to the technical field of concrete structures, and discloses a composite reinforced light environment-friendly pervious concrete structure which comprises a pervious concrete structure body which is composed of a rammed earth layer, a base gravel layer, a pervious plain color layer, a pervious surface layer and a surface layer sealant. The rammed earth layer is located at the bottommost portion of the pervious concrete structure, the base gravel layer is arranged on the rammed earth layer, the pervious plain color layer is arranged on the base gravel layer, the pervious surface layer is arranged on the pervious plain color layer, the surface layer sealant is arranged on the top of the pervious surface layer, and the surface layer sealant is arranged on the top of the pervious surface layer. Reinforcing and reinforcing holes formed in the rammed earth layer and the base matched broken stone layer are filled with composite cement columns used for reinforcing the strength of the rammed earth layer and the base matched broken stone layer, the strength of the pervious concrete structure is better improved, and the service life of the pervious concrete structure point is prolonged; and the water permeability of the pervious concrete structure is not influenced.

The invention provides a remote sensing image rammed earth ruin boundary automatic extraction method fusing U-Net and OBIA-CNN, and the method comprises the steps: carrying out the preprocessing of an obtained remote sensing image containing the rammed earth ruin boundary, and obtaining a standardized remote sensing image sample block; a U-Net network is input for pixel-level initial segmentation, and pixel-level ruins candidate areas are obtained; carrying out multi-scale segmentation on the ROI image limited by the obtained ruins candidate region by adopting an OBIA method to obtain an image object with spatial continuity and semantic consistency; and cutting an object center sample block from each image object, and inputting the object center sample block into a convolutional neural network for feature extraction and classification to obtain a ruins boundary extraction result. According to the method, pixel-level initial segmentation is carried out by introducing a U-Net network, and fine analysis and classification are carried out on an object level in combination with OBIA-CNN, so that stable, continuous and high-precision extraction of a ruins boundary under a complex background condition is realized; the integrity and stability of the ruins boundary are improved while irrelevant background interference is reduced.

The invention relates to the technical field of rainwater drainage, in particular to a rainwater drainage system with an overflow function, which comprises a rainwater drainage foundation, a water collecting pipe, a perforated collecting pipe and a water outlet pipe, the rainwater drainage foundation is sequentially provided with a rammed earth layer, an anti-seepage geomembrane, a gravel drainage layer, a gravel layer, a soil replacing and filling layer, a covering layer and a deep stagnant water layer from bottom to top; a water collecting pipe vertically penetrates through the rainwater drainage foundation, a water grating barrel is arranged on the top of the water collecting pipe, and an overflow opening is formed in the top of the water grating barrel. A plurality of perforated collecting pipes are arranged in the gravel drainage layer at the waist part of the water collecting pipe, the perforated collecting pipes are vertically connected with upward blind pipes, and backwashing openings are formed in the pipe ends, extending out of the top surface of the rainwater drainage foundation, of the blind pipes. The system has the beneficial effects that the system is suitable for the fields of urban rainwater management, ecological wetland construction, rainwater gardens, green roofs and the like, and the functions of efficient collection, purification, discharge utilization and overflow prevention of rainwater are achieved.

The utility model discloses a novel rammed earth building structure which comprises a foundation, and the foundation is arranged at the position, close to an original rammed earth building wall, reserved after an original building roof is dismantled and used for supporting a novel structure system without disturbing an original rammed earth building structure foundation. The vertical steel columns are arranged on the foundation to form an inner skeleton of the building, and a certain space distance is kept between the vertical steel columns and an original rammed earth building wall; the steel bar truss floor support plate is arranged on the vertical steel columns; the original roof panel connecting structure comprises a square steel pipe, rock wool and a wood veneer, the square steel pipe is used for supporting the connecting part of the original roof panel and the rammed earth building, a gap between the square steel pipe and an original rammed earth building wall is filled with the rock wool, and the wood veneer is used for blocking the connecting position between the square steel pipe and the original rammed earth building wall. The safety, the space practicability and the durability of the dangerous and old building structure are improved, the improvement cost is saved, and application and popularization are facilitated.