456 results about "Ponding" patented technology

The invention relates to the technical field of digital twinning, in particular to a high-density urban ponding evolution and early warning method based on digital twinning. The method comprises the following steps: real-time ponding depth, real-time river water level, real-time meteorological conditions and real-time drainage pipe network water level conditions corresponding to a city are collected in real time through ponding depth, river water level, meteorological monitoring and drainage pipe network sensors installed in the city, digital twinborn construction is carried out, and an urban inland inundation digital twinborn model is generated; obtaining drainage pipe network distribution and carrying out drainage grid division to generate an urban drainage grid model; acquiring a historical ponding event rule, and performing ponding area prediction analysis and ponding evolution coupling analysis to generate an urban ponding evolution distribution field; performing ponding space-time evolution analysis and ponding early warning processing on the urban ponding evolution distribution field so as to execute corresponding urban ponding emergency response work. According to the invention, accurate ponding evolution prediction and effective early warning can be provided.

The invention provides an urban road ponding monitoring and drainage system. The urban road ponding monitoring and drainage system comprises a monitoring module which collects ponding depth, water velocity, rainfall intensity and field image data in real time; the initialization configuration module sets parameters such as an accumulated water depth threshold value; the data transmission module encrypts and transmits data to the central control module; the model algorithm optimization module constructs a three-dimensional ponding diffusion model and outputs a predicted ponding depth and an optimized drainage strategy; the central control module generates a drainage pump rotating speed instruction and the like; the drainage execution module dynamically adjusts drainage pump power and a drainage path; the self-checking and fault-tolerant module calculates a health index of drainage equipment and switches redundant equipment; the early warning module sends risk level information; and the interaction module displays information such as a real-time accumulated water thermodynamic diagram. The urban road drainage efficiency can be improved, the water accumulation risk is reduced, and smooth urban traffic and public travel safety are guaranteed.

The invention discloses an intelligent method and system for multi-source heterogeneous data fusion management, and belongs to the field of data processing, and the intelligent method for multi-source heterogeneous data fusion management comprises the following steps: deploying a sensor network in a historical ponding area based on historical ponding point data and urban hydrological geographic information, acquiring real-time monitoring data, wherein the real-time monitoring data comprises rainfall intensity, road waterlogging depth, community waterlogging condition and drainage pipe network water level / flow; compared with the prior art, the method has the beneficial effects that sensors are arranged in the historical ponding area to obtain real-time monitoring data, and weather forecast, a terrain model and a pipe network model are combined to construct a waterlogging prediction model to predict whether a ponding risk exists in the historical ponding area in future set time (such as 0.5-3 hours in the future); the ponding risk is treated in advance, so that the problems of traffic interruption caused by ponding, citizen travel obstruction and the like are solved.

The invention discloses water-activated cold patch asphalt, a water-activated cold patch asphalt mixture and a preparation method of the water-activated cold patch asphalt mixture. The asphalt comprises the following components in parts by weight: 100 parts of matrix asphalt, 20-30 parts of a bio-oil diluent, 30-45 parts of a polyurethane prepolymer and 1-5 parts of a dewatering agent. The polyurethane prepolymer comprises a main body polyurethane prepolymer and an organic silicon modified polyurethane prepolymer, and the organic silicon modified polyurethane prepolymer accounts for 20 to 30 weight percent of the main body polyurethane prepolymer. The organic silicon modified polyurethane prepolymer is prepared by carrying out hydrosilylation reaction on a polyurethane prepolymer containing a carbon-carbon double bond and a siloxane compound containing a silicon hydrogen group in a mass ratio of (15-25): 1. The cold patch asphalt mixture disclosed by the invention has excellent water damage resistance, and has relatively strong adaptability to severe environments such as rain, snow and accumulated water.

The utility model relates to the technical field of building heat preservation and drainage, and discloses a drainage and exhaust structure of a roof heat preservation system, the drainage and exhaust structure comprises an exhaust pipeline, a drainage groove seat and an exhaust auxiliary assembly, the exhaust pipeline is installed in a joint of two adjacent heat preservation layers, and the drainage groove seat is installed on the side of the heat preservation layers in an embedded mode. The exhaust pipeline which is through longitudinally and transversely is arranged in the heat preservation layer of the roof, the air guide through hole is formed in the upper portion of the exhaust pipeline, the end of the pipeline extends out of the roof by 90 degrees, so that water vapor in the heat preservation layer can be discharged in time, the drainage groove base is pre-buried in the connecting side of the heat preservation layer, and accumulated water in the heat preservation layer is discharged through the drainage groove base. Cracking and damage of the roof caused by frost heaving of water and pressure of gas can be effectively prevented, the service life of the roof is greatly prolonged, an active exhaust structure is formed by the semicircular fan cover and the exhaust fan blades, the semicircular fan cover is driven by wind power of the roof to drive the exhaust fan blades to rotate, and exhaust of water vapor can be accelerated through the air draft effect.

The utility model discloses a side slope protection structure, and relates to the technical field of side slopes. The slope comprises a slope body, a concrete slope layer is arranged on the outer surface of the slope body, a groove is formed in the top of the concrete slope layer, a water storage tank is formed in the concrete slope layer, the groove and the water storage tank communicate with a flow channel, and a plurality of planting grooves are formed in the slope surface of the concrete slope layer in an array mode; the planting groove is filled with a soil layer for planting vegetation; the water storage tank is formed in the concrete slope layer, the water storage tank is communicated with the groove through the flow channel, accumulated water on the road surface can be collected and stored, the sponge rod is connected between the water storage tank and the planting groove, water in the water storage tank is automatically supplied to the soil layer through the water absorption of the sponge rod, normal growth of green vegetation is ensured, and the service life of the planting groove is prolonged. And meanwhile, the stored water source is used for automatically supplying water, the irrigation interval is prolonged, the irrigation frequency is reduced, and therefore the practicability is improved.

The invention discloses a road ponding point prediction method fusing historical waterlogging points and spatial clustering, and the method comprises the following steps: S1, carrying out the rapid numerical simulation of surface ponding through the rapid estimation of rainfall runoff and displacement, and obtaining a depth estimation value of the surface ponding; s2, on the basis of the historical waterlogging point position, the accumulated water high-risk area is determined by integrating the estimated value of the surface accumulated water depth; s3, adopting an improved DBSCAN clustering algorithm, and taking the ponding high-risk area as input to predict the ponding point location; and S4, outputting a predicted ponding point with latitude and longitude coordinates, a geographic address and maximum ponding depth information based on geocoding. The position address information is obtained on the basis of the surface ponding depth prediction matrix, so that the ponding address information based on points is formed, and emergency disposal personnel can conveniently and quickly arrive at the site.

The invention discloses an airport roof rainwater treatment monitoring system and method based on cloud computing, relates to the technical field of rainwater monitoring, and solves the technical problems that under extreme weather conditions such as rainstorm, a traditional drainage system is difficult to drain roof accumulated water quickly, accumulated water flooding may be caused, and normal operation of an airport is affected. The rainfall of the target area is predicted; determining a drainage pipeline combination according to the rainfall of the target area; obtaining the content of each element in the rainwater, and analyzing the water quality index of the rainwater; evaluating the pollution level of the rainwater based on the water quality index; based on the pollution level of the rainwater, different water qualities are conveyed to the corresponding reservoirs; based on the pollution level of the rainwater, different water quality is conveyed to the corresponding filter tanks; the device can quickly and effectively disperse and drain accumulated water on the roof, so that the pressure of the accumulated water on an airport building structure is reduced, and the service life of a building is prolonged.

The utility model relates to the technical field of building construction, in particular to a roof double-layer inner drainage device which comprises a base layer and further comprises a pre-buried downpipe buried in the base layer, an annular wing plate is horizontally fixed to the top end of the outer side wall of the pre-buried downpipe, and the lower surface of the annular wing plate is attached to the upper surface of the base layer. A water stop ring is horizontally fixed to the outer side wall of the pre-buried downpipe and buried in the base layer, an inner drainage pipe is inserted into the pre-buried downpipe, a protective cover is installed at the top end of the inner drainage pipe, a positioning clamping ring is horizontally arranged on the outer side wall of the inner drainage pipe, and the lower surface of the positioning clamping ring is attached to the upper surface of the annular wing plate. The problems that according to an existing downpipe drainage system, the heat preservation performance is reduced and mildewing is caused due to the fact that water accumulation in a heat preservation layer cannot be effectively treated, accumulated water permeating into a roof from the roof damages a building structure, and a downpipe is prone to being blocked are solved.

The utility model provides a roof anti-leakage structure, which relates to the technical field of building roofs and comprises a storage box, the storage box is provided with at least one opening, guide rails extending downwards in an inclined manner are fixedly mounted at two ends of the opening, connecting shafts are movably mounted in the guide rails, and arc-shaped wind shields which deform elastically are arranged on the outer walls of the connecting shafts; one end of the waterproof cloth is fixedly connected with the connecting shaft, the other end of the waterproof cloth is connected with the rotating shaft in the storage box, the waterproof cloth is arranged in a double-layer mode, and an elastic opening long strip is sewn on the cloth cover, close to the rotating shaft, of the lower-layer waterproof cloth; the elastic opening long strip corresponds to an air blowing opening of an air blowing device which is located at the bottom of the storage box and aligned to the ridge, the air blowing device blows air into a triangular area defined by the elastic opening long strip, the rainproof cloth and the roof at the same time, and the area of the air inlet is larger than that of the air outlet. Therefore, the problem that when rainwater is heavy, the rainproof cloth sinks downwards, water is accumulated, and drainage is not facilitated is solved.

The invention provides a vehicle wading early warning method, system and device. The method comprises the steps that current vehicle driving information, spatial distribution information of a ponding area and current environment parameter information are collected in real time; and based on the spatial distribution information and the current environment parameter information, obtaining the predicted passing time of the vehicle. And obtaining final whole-course ponding information based on the vehicle predicted passing time, the current environment parameter information and the current vehicle driving information. And predicting a vehicle wading risk level based on the final whole-course ponding information, and performing early warning by adopting a preset early warning mode. According to the method provided by the invention, the technical problem that the vehicle wading risk cannot be dynamically pre-judged due to the fact that only single-point water depth detection is adopted in vehicle wading early warning in the prior art, and the terrain difference of the whole process of the ponding area and the ponding increment within the passing time are not covered is effectively solved.

The invention provides an accumulated water identification method, device and equipment and a medium, and the method comprises the steps: obtaining a first sample image set and a second sample image set, marking the accumulated water region of each sample image in the first sample image set through a rectangular detection frame, the water accumulation area of each sample image in the second sample image set is marked by adopting a pixel-level contour; training a ponding detection model based on the first sample image set, and training a ponding segmentation model based on the second sample image set; obtaining a to-be-detected image, and inputting the to-be-detected image into the trained ponding detection model and the trained ponding segmentation model to obtain a first recognition result and a second recognition result; and if both the first identification result and the second identification result indicate that the ponding exists in the target area of the to-be-detected image, determining that the ponding exists in the target area. The method can be applied to underground vestibule ponding recognition, so that the underground vestibule ponding recognition efficiency and accuracy are improved.

According to the bridge floor drainage system of the double-layer steel structure bridge, the double-layer steel structure bridge comprises an upper-layer bridge floor and a lower-layer bridge floor, and the top face of each of the upper-layer bridge floor and the lower-layer bridge floor comprises a steel beam top plate and a pavement layer laid on the upper side of the steel beam top plate; the bridge floor drainage system comprises an upper-layer bridge floor drainage system and a lower-layer bridge floor drainage system which are respectively arranged on the upper-layer bridge floor and the lower-layer bridge floor; each of the upper-layer bridge floor drainage system and the lower-layer bridge floor drainage system comprises a steel box girder cantilever arm arranged on the outer side of the sidewalk guardrail, a plurality of drainage assemblies are arranged in the steel box girder cantilever arms at intervals in the bridge direction, and water flow collecting pipes connected with the drainage assemblies are fixedly mounted at the bottoms of the steel box girder cantilever arms; the water flow collecting pipe is arranged along the steel box girder cantilever arm, the steel truss and the pier and drains water flow into a ground drainage system along with the pier. The drainage device is beneficial to drainage of the double-layer steel structure bridge deck, good in drainage effect and convenient to maintain, the durability of the bridge deck is improved, and the safety risk caused by accumulated water on the bridge deck is greatly reduced.

The invention discloses an urban community surface ponding simulation method and system considering a roof structure, and aims to solve the problem that an existing ponding simulation method does not consider the influence of a building roof on ponding formation, and the method comprises the following steps: collecting multi-angle photo data to construct an oblique photography model and a digital surface model; roof data are extracted from the digital surface model, and roof types are divided into flat roofs and sloping roofs; according to the characteristics of a flat roof and a slope roof, a flat roof drainage structure and a slope roof drainage structure are constructed respectively, and then a roof drainage model considering the roof type is constructed; integrating the roof drainage model and the urban community hydrological model considering the roof, and operating the urban community hydrological model to simulate urban community surface ponding; on the basis of actual drainage conditions of different roof types, drainage structures suitable for flat roofs and slope roofs are arranged, the influence of roof structures on urban ponding is effectively simulated, and more accurate urban surface ponding simulation is achieved.

The invention discloses a road waterlogging early warning method and device based on segmentation distillation enhancement and electronic equipment, and relates to the field of image processing, and the method comprises the steps: collecting a road image of a target road, and obtaining a prompt text; the road image and the prompt text are input into a waterlogging recognition model, a waterlogging recognition result of the target road is output, and the waterlogging recognition model is obtained through pre-training based on a segmentation distillation enhancement technology and used for recognizing the waterlogging condition of the road. The ponding identification result comprises at least one of ponding state, ponding scene and ponding influence; and generating early warning information and a processing strategy for the target road according to the accumulated water identification result. According to the method and the device, the technical problems of relatively low detection result accuracy and single detection result content in a mode of detecting road ponding through a target detection mode in the related technology are solved.

The utility model discloses a roof rainwater collecting and filtering device, which relates to the technical field of rainwater collection and comprises a house body, a rainwater collecting mechanism is mounted on the outer surface of the house body, and the rainwater collecting mechanism comprises water collecting tanks fixed on the left side surface and the right side surface of the house body. Rainwater can flow into the fixing pipe through the water filtering holes, the blades are pushed through impact force of the rainwater, the blades drive the rotating rods to rotate, the rotating rods drive the scraping plates to rotate, the scraping plates push away sundries on the water filtering holes, and the water filtering holes and the fixing pipe are effectively prevented from being blocked; rainwater enters the water accumulation bin through the water conveying pipe and the through pipe through the fixed pipe and is filtered through the filtering holes in the movable frame, the filtered water enters the bottom of the water accumulation bin, the water pushes the floating rod through buoyancy, the floating rod pushes the movable frame to move upwards, and sundries in the movable frame are pushed out of the water surface. The pipeline can be effectively prevented from being blocked, and meanwhile sundries on the movable frame can be conveniently cleaned.

The invention relates to the technical field of waterproof coatings, in particular to a waterproof coating permeability detector which comprises a vertically-through water storage cylinder, a plurality of water leakage holes which are uniformly distributed in the circumferential direction and are used for controlling opening and closing are formed in the bottom of the circumferential surface of the water storage cylinder, and a water spraying mechanism is further arranged in the water storage cylinder; in the matching process of the water storage cylinder and the concrete slab, the water leakage holes are closed, and colored water is poured into the water storage cylinder, so that the situation that water is accumulated on the concrete slab can be simulated; the water leakage holes are opened, water is sprayed to the concrete slab through the water spraying mechanism, redundant water leaks out through the water leakage holes, then the conditions that no water is accumulated in concrete and waterproof materials are watered in rainy days can be simulated, the used concrete slab can further simulate actual use materials of a building, and then through the integration of the water storage cavity and the multi-mode control system, the water storage cavity and the multi-mode control system are integrated. Double-working-condition simulation detection of the waterproof material of the concrete base plane in ponding and rainfall scenes is realized, and the accuracy of detection data is ensured.

The invention discloses a basement bottom plate post-cast strip waterproof construction method and structure. The method comprises the steps that a basement bottom plate foundation and a post-cast strip downwards-concave foundation are excavated; concrete cushion layer pouring is conducted, and a basement bottom plate concrete cushion layer and a post-cast strip downward-concave type deformation buffer strip are formed; the basement bottom plate concrete cushion layer is subjected to surface treatment, so that the basement bottom plate concrete cushion layer is kept flat and dry; waterproof construction is conducted on the basement bottom plate concrete cushion layer and the surface layer of the post-pouring cushion layer; reinforcing steel bars of a basement bottom plate and a post-cast strip are bound, and meanwhile a water stop strip steel plate is installed; a basement bottom plate is poured, and then concrete curing is conducted; an advanced water stop structure is arranged at the intersection of the post-cast strip pouring cavity and the post-cast strip; an advanced water stop structure is arranged at the intersection of the post-cast strip pouring cavity and the post-cast strip; concrete structures on the two sides of the post-cast strip are subjected to roughening treatment and coated with a cement-based permeable crystallization type waterproof coating, and concrete pouring forming is adopted. According to the construction method, water accumulation at the bottom of the post-cast strip and cracking of the structure are avoided.

The application provides a drainage system, relates to the technical field of drainage systems, and comprises a garage roof, a leveling layer and a waterproof layer arranged on the garage roof, a drainage structure and a filtering and collecting assembly, the waterproof layer is provided with the drainage structure, the upper layer of the drainage structure is provided with a soil layer, the drainage structure is used for collecting rainwater through the infiltration of the soil layer and guiding the rainwater to a drainage link, the side of the drainage structure is provided with a flow guide anti-blocking structure capable of preventing impurities from entering the inside of the drainage structure, and the filtering and collecting assembly is used for collecting the infiltration water collected by the drainage structure and draining the infiltration water into a water body nearby, thereby solving the technical problem that in the related art, a single filtering layer is difficult to completely filter small solid impurities in the infiltration water, part of the impurities are accumulated in the drainage structure, water is accumulated on the garage roof, and the service life of the waterproof layer is affected.

The invention relates to the technical field of urban hydrological simulation. The invention discloses an urban community surface ponding simulation method considering a roof structure, and the method comprises the steps: obtaining a regional multi-angle picture through an oblique photography unmanned plane, generating an oblique photography model through image processing, and reconstructing a digital surface model according to the oblique photography model; ground data are separated from the DSM through a PMF method, roof data are extracted in combination with building features, mask data are output, other ground features are removed, and building roof elevation grid data are obtained; calculating the gradient of the roof, dividing the gradient into flat and sloping roofs, building drainage structures into roof drainage models, integrating the roof drainage models with the urban community hydrological model considering the roofs, and running to realize surface ponding simulation. The method comprises the following steps: building a high-precision model through an oblique photography unmanned aerial vehicle and a GIS, separating ground data through a PMF, and accurately dividing a flat / slope roof through median filtering and an SVM; special drainage structures are arranged for the two types of roofs; and integrating the roof drainage model and a two-dimensional coupling hydrological model, and outputting an accumulated water thematic map.

The invention discloses a low-maintenance water-seepage-prevention construction process for a bridge section steel expansion joint. The low-maintenance water-seepage-prevention construction process comprises the following specific process steps that (1) construction preparation is conducted; 2) slotting the expansion joint; 3) mounting a profile steel expansion joint; 4) installing a guide and drainage system; (5) concrete is poured; (6) concrete curing; (7) an anti-blocking rubber strip is installed; (8) carrying out quality acceptance; an auxiliary welding device in the step 3 comprises expansion joints, embedded steel bars, a gantry module mechanism, a positioning mechanism, a supporting mechanism, a walking mechanism and transverse steel bars. The embedded steel bars are fixed to the road surface, the expansion joint is placed between the embedded steel bars, and the gantry module mechanism stretches across the expansion joint. Water accumulation at the joint of concrete and asphalt at the expansion joint can be prevented, impermeability of the steel fiber concrete reinforced body is enhanced, the compact structure is guaranteed through four-layer maintenance, the device is kept clean through anti-blocking rubber strips, all links are matched with one another, a full-period protection closed loop is formed, and the profile steel expansion joint can be prevented from inclining and deviating in the pouring process.

The utility model relates to the technical field of pavement detection, and discloses an anti-leakage water seepage instrument. Through the arrangement of the annular sealing groove, when the equipment is erected on the ground, after sealant smeared on the ground is extruded by the whole equipment, the sealant can be poured upwards into the annular sealing groove, and therefore the contact area between the sealant and the equipment is effectively increased, and the possibility that liquid water in the water accumulation groove leaks to the outer side is reduced. According to the wax melting device, the annular wax melting groove and the annular heating hopper are further arranged, wax blocks can be contained in the annular heating hopper, when the wax blocks are heated by the annular heating hopper to become liquid, liquid wax enters the wax melting groove to form a second barrier, and liquid water is prevented from leaking from the interior of the water accumulation groove. In conclusion, the equipment is provided with the annular sealing groove and the annular wax melting groove to respectively form two sealing waterproof partitions, so that the problems of inaccurate measurement result and the like caused by leakage of liquid water in the water accumulation groove can be effectively avoided.

The invention discloses a drainage system for a large-span arc-shaped metal roof of a coal shed and a construction method.The drainage system comprises a buttress, a top plate is arranged at the top of the buttress through a main purline, the main purline is obliquely arranged, the bottom end of the main purline is close to the buttress, and a triangular supporting frame is fixed to the outer side of the buttress; the surface of the triangular supporting frame is provided with a water diversion ditch, and the water diversion ditch is provided with a communicating groove corresponding to the top plate. The inner bottom surface of the gutter is inclined, the lower end of the inclined surface is far away from the buttress, and one end of the gutter is provided with an inclined panel extending downwards. The large-span roof drainage device has the advantages that rainwater is guided to the diversion ditches on the triangular supporting frame through the slope of the roof, the main diversion pipe and the secondary diversion pipe are connected with the main diversion holes and the secondary diversion holes in the diversion ditches respectively, graded collection and efficient diversion of the rainwater are achieved, smooth drainage of a large-span roof is guaranteed, and accumulated water is reduced.

The invention relates to the technical field of anti-floating of underground engineering, in particular to a permanent and temporary combined active drainage anti-floating construction method based on a BIM (Building Information Modeling) technology, which comprises the following steps: arranging a galvanized steel filter pipe below each column pier, welding a steel plate water stop ring on the outer side wall of each galvanized steel filter pipe, and collecting underground water through the galvanized steel filter pipes; after construction of the foundation slab is completed, a sealing plate is welded to the top end of the galvanized steel filter pipe, and a galvanized steel pipe and a plug are welded to the side face of the galvanized steel filter pipe; a PPR horizontal drainage pipe is arranged in a ground layer on the upper portion of a foundation bottom plate, a galvanized steel pipe is connected with the PPR horizontal drainage pipe through a three-way pipe, accumulated water of a galvanized steel filter pipe is guided into a nearby water collecting well of the area through the PPR horizontal drainage pipe, and the position of the pipeline is recorded through the BIM technology. According to the method, interference of underground water on foundation construction is reduced, maintenance and replacement of the horizontal drainage pipe in the use stage are facilitated, underground water is continuously drained in the operation stage in extreme climate, and damage to buildings due to rising of the underground water level is avoided.

The utility model relates to the technical field of slope protection structures, in particular to an ecological slope protection structure. According to the technical scheme, the device comprises two sets of cross protection frames, each set of cross protection frame comprises a cross protection plate, a connecting table is arranged at the end corner position of one end of each cross protection plate, and a protection pier is arranged at the end corner position of the end, away from the connecting table, of each cross protection plate; a lower side plate frame and an upper side plate frame are arranged on the sides, close to each other, of the fender piers on the two sets of crossed protective frames correspondingly. The cross protection frame, the lower side plate frame and the upper side plate frame are integrally arranged in the shape of the inclined plane rhombus, so that the slope protection frame can be better matched with a sloping field, meanwhile, the rhombus structure can provide a better drainage effect, water retention on the slope surface can be reduced, landslide or soil erosion caused by accumulated water is avoided, and the slope protection effect is improved. Meanwhile, flexible adjustment can be achieved according to different terrains and gradients, different slope protection requirements are met, the self-locking performance and stability are high, external pressure and stress can be effectively dispersed, and slope landslide or collapse is prevented.

The utility model discloses a secondary drainage system which comprises a main drainage pipe located in a floor structure, a waterproof leveling layer is laid at the upper end of the floor structure, a waterproof layer is laid at the upper end of the waterproof leveling layer, one end of the waterproof layer is rolled downwards to the inner wall of the main drainage pipe, and the other end of the waterproof layer is rolled downwards to the inner wall of the main drainage pipe. A secondary drainage component is inserted into an opening in the upper end of the main drainage pipe, the secondary drainage component comprises an annular filter cover installed at the upper end of the waterproof layer and an adapting pipe arranged in the annular filter cover in a sleeved mode, the upper end of the adapting pipe is connected with a floor drain, and a waterproof protection layer is laid on the peripheral side of the annular filter cover. The upper end of the waterproof protection layer is connected with a brick surface layer through a mortar layer, and a plurality of U-shaped cavities communicated with the main drainage pipe are evenly formed in the outer side face of the annular filter cover. The secondary drainage component is connected with the main drainage pipe, the construction form is simple, accumulated water on the waterproof layer can be effectively drained, and the steel wire mesh is embedded in the annular filter cover, so that mortar is prevented from blocking the U-shaped cavity.

The utility model discloses a double-guide drainage structure for roof external drainage, and relates to the technical field of house building construction. According to the technical key points, the device comprises a first double-water-guide assembly arranged at the junction of a roof structure and a parapet wall, the first double-water-guide assembly comprises a horizontal main water drainage pipe, the horizontal main water drainage pipe is installed on the parapet wall in a penetrating mode, and the inner wall of the lower side of the horizontal main water drainage pipe is flush with a protective surface layer in the roof structure; a horizontal drainage branch pipe is arranged under the horizontal main drainage pipe, and the lower side inner wall, located at one end of the inner side of the parapet wall, of the horizontal drainage branch pipe is aligned with the lower bottom of a heat preservation layer in the roof structure. The ends, located on the outer side of the parapet wall, of the horizontal drainage branch pipe and the horizontal main drainage pipe are fixedly connected with a vertical outer drainage pipe. By means of the horizontal main water drainage pipe and the horizontal water drainage branch pipe in the first double-water-guide assembly, accumulated water above a protective layer in the roof structure can be effectively drained, and when accumulated water exists in the roof structure, the accumulated water in the roof structure can be effectively drained.

The utility model discloses an urban water-permeable brick, which belongs to the field of floor tiles and comprises a water-permeable brick body and a filter screen, the middle of the water-permeable brick body is provided with a vertically through central water tank, the bottom of the water-permeable brick body is provided with a bottom surface water tank, and the bottom surface water tank transversely penetrates through the bottom surface of the water-permeable brick body. A plurality of water permeable brick bodies are sequentially arranged together in a manner that the end faces abut against one another, so that the bottom surface water tanks are communicated with one another, surface water tanks are formed in the tops of the water permeable brick bodies, and the bottom surface water tanks and the surface water tanks are vertically communicated through central water tanks. The bottom face and the center of the brick body have certain water containing and draining capacity, rainwater can be absorbed and stored in the water permeable brick, the drainage system of a city is effectively improved, and underground water resources are supplemented in time; in addition, rapid drainage can be achieved, runoff drainage is reduced, and pollution of surface accumulated water to the environment is reduced when rainfall is dense.

The utility model relates to the technical field of parapet wall root waterproof structures, and discloses a building roof parapet wall root waterproof structure which comprises a parapet wall, a concrete line is fixedly connected to the parapet wall, a water falling opening is formed in the parapet wall, a filter screen is fixedly connected to the water falling opening, an arc angle is arranged on the parapet wall, and the concrete line is fixedly connected to the concrete line. The building roof parapet wall root waterproof structure comprises a parapet wall, a roof is fixedly connected to the parapet wall, a first layer is arranged on the parapet wall, and a second layer is arranged on the first layer. When the building roof parapet wall root waterproof structure is constructed, it is guaranteed that rainwater can be rapidly and effectively drained when accumulated through a water falling opening; the roof and parapet wall root leakage problem caused by excessive accumulated water is prevented, the waterproof performance of a building is improved through the multi-layer waterproof material, the durability of a building structure is enhanced, the problem of foaming or hollowing of the waterproof layer is effectively solved through the arc corners arranged on the base layer, and firm bonding between the waterproof layer and the base layer is guaranteed.

The invention discloses a construction method for a post-cast strip of an underground shear wall. The construction method comprises the following steps: S1, constructing a raft foundation; s2, shear wall construction; s3, post-cast strip water stop structure construction, wherein a water stop structure of an arch ring structure is built on the outer side of the post-cast strip area of the shear wall, and waterproof layer operation and earthwork backfilling operation are conducted on the outer side of the water stop structure; s4, post-cast strip construction is conducted, specifically, after post-cast strip formworks are manufactured and installed in the post-cast strip area, concrete pouring of the post-cast strip area is completed; according to the post-cast strip water stop structure, the waterproof effect of the post-cast strip is enhanced, corrosion of steel bars in the post-cast strip and water accumulation of a basement caused by permeation before the post-cast strip of the basement is sealed are avoided, the rainfall construction amount can be reduced, the construction time is saved, the engineering quality is improved, and the engineering construction difficulty is reduced; and meanwhile, the post-cast strip is sealed through the post-cast strip water stop structure, so that construction period delay caused by post-cast strip construction intermittence can be reduced, and basement exterior wall waterproof layer construction and foundation pit backfilling earthwork operation are carried out in advance.