1204 results about "Drainage ditch" patented technology

The utility model discloses an efficient drainage ditch excavation device based on an adjustable shaping excavator bucket, and relates to the technical field of municipal engineering and hydraulic engineering construction. Different design requirements are met by hydraulically adjusting the size of the bucket, the bucket body is formed at a time, manual finishing and template use are reduced, the construction cost is reduced by more than 20%, the excavation precision is controlled by combining GPS positioning and real-time measurement, the groove longitudinal slope and elevation precision is ensured, and the construction efficiency is improved. One-time forming of the drainage ditch and synchronous outward transportation of spoil are achieved, and site accumulation is avoided. According to the scheme, the construction efficiency and quality are remarkably improved, and the method is suitable for municipal drainage engineering under soil texture and strong weathered rock geological conditions.

A strap-supported grate section in a surface-supported drain grate system includes a drain grate; at least one inner strapping member having a middle portion affixed on a top facing inner section of the drain grate; and two anchor strapping members, each of which has a middle portion that is affixed on a top facing edge of the drain grate. Outer portions of each anchor strapping member and outer portions of the inner strapping member are not affixed to the drain grate. The outer portions of the anchor strapping members and the inner strapping member are surface mountable on a surface adjacent to a drain structure in which the strap-supported grate section is inset to provide structural support for the strap-supported grate section.

A three-dimensional parameterization design method for a side slope water interception and drainage ditch mainly comprises the steps that water interception and drainage objects are arranged on a three-dimensional side slope, and the water interception and drainage objects comprise two sub-objects of an axis and sections of different forms; drawing a ditch axis in the three-dimensional space; setting water interception and drainage section attributes; setting an axis control point, and associating section attributes; calculating a project amount according to the axis and the association attribute; and generating a two-dimensional profile map according to the interception and drainage parameters and the three-dimensional geological information. According to the method, a unique method of coupling a three-dimensional axis graph and a section parameter is adopted, the problem that the difference between the section size and the axis length of the ditch is too large in a conventional three-dimensional design is avoided, and the drawing quality of the ditch is kept good during sectioning; a parameterization + non-parameterization coupling sectioning technology is adopted, the problem that a BIM parameterization model and a GIM information model are difficult to integrate on the aspect of sectioning drawing based on a three-dimensional model is solved, and rapid drawing of a two-dimensional section of a slope intercepting and draining ditch on the basis of the three-dimensional model is achieved.

The invention relates to the technical field of tunnel engineering disease treatment, in particular to a construction method of a drainage system for karst tunnel inverted arch upheaval disease treatment, which comprises the following construction steps: S1, arranging settlement monitoring points in a disease section tunnel, and arranging a reinforcing structure in a lining arch foot area; and S2, the existing disease inverted arch is broken and removed section by section according to the preset length, and temporary supporting is carried out in time. And S3, an overhaul window is dug in the lining through a water mill drill, and a supporting structure is synchronously installed. And S4, a foundation trench is excavated in the bottom of the inverted arch, a concrete strip-shaped foundation is poured to serve as a foundation of the steel corrugated pipe arch culvert, the steel corrugated pipe arch culvert is installed, the axis of the steel corrugated pipe arch culvert is consistent with the karst cave water flow direction, and the steel corrugated pipe arch culvert is in sealed butt joint with the confluence overhaul groove. And S5, a drainage pipe is pre-buried in the inverted arch reconstruction section, the confluence overhaul groove and the central drainage ditch are connected, and finally concrete is poured to seal the inverted arch structure. The method effectively solves the problem of upheaval of the inverted arch caused by water burst of the deeply-buried karst cave, reduces the damage of the lining structure, and improves the long-term stability of the tunnel.

The invention relates to the technical field of environment management data analysis, and discloses a farmland drainage ditch ecological restoration evaluation method and system. The method comprises the steps of obtaining drainage ditch multi-parameter ecological monitoring data, calculating a farmland-ditch interface permeability index, establishing a response delay kinetic equation to solve a time delay coefficient, and generating a restoration effect evaluation result by applying a time sequence tracking algorithm. According to the method, the problem that farmland drainage ditch ecological restoration assessment lacks interface permeability quantitative analysis, time delay modeling and spatial distribution identification is solved, and the scientificity and the accuracy of restoration effect assessment are improved.

The invention relates to a pheretima bombycis farm, and belongs to the technical field of earthworm breeding. The problem that earthworm suffocation death is caused by cross contamination of pathogenic microorganisms and unsmooth drainage due to mixing of functional areas of a traditional farm is solved. The layout of the farm is specifically as follows: a raw material pretreatment and storage area provided with a fermentation tank is arranged in the upwind direction of a site entrance; a core breeding production area is arranged in the center of the field, the interior of the core breeding production area is divided into an earthworm breeding area, a breeding area and a fattening area according to breeding stages, and mechanical channels are arranged in the areas and are of a ridge type structure; arranging an annular drainage ditch along the boundary of the field, and communicating the furrow with the annular drainage ditch by gradient; a finished product treatment and storage area containing an airing field is arranged in the downwind direction of the field exit; an isolation belt is arranged on the periphery, a management and auxiliary area containing a tool room is arranged at an entrance, and a feces treatment area containing a sedimentation tank is arranged in the downwind direction; the hardened main road is connected with all the functional areas, and the branch is communicated with the breeding district. According to the scheme, pollution source isolation and efficient drainage are achieved, and the method is mainly used for improving the earthworm survival rate and breeding benefits.

The utility model discloses a road slope earth shoulder drainage system which comprises a water outlet piece, an earth shoulder vertical curb water blocking belt, a transverse drainage pipe assembly, a longitudinal drainage pipe and a base. The water outlet piece and the earth shoulder vertical curb water blocking belt are arranged on the edge of a highway pavement and used for collecting water in a centralized mode. The base is embedded in a side slope; the longitudinal drainage pipe is arranged on the base, and the longitudinal drainage pipe is longitudinally arranged in the advancing direction of a road; one end of the transverse drainage pipe assembly is connected with the water outlet piece and the earth shoulder vertical curb water blocking belt, and the other end of the transverse drainage pipe assembly is connected with the longitudinal drainage pipe. The longitudinal drainage pipe is provided with a plurality of sections, and the plurality of sections of the longitudinal drainage pipe are communicated with one another and finally communicated to a rain sewage outlet point. The drainage ditch is suitable for the conditions that drainage of a highway embankment drainage ditch arranged by utilizing gravity flow is unsmooth, natural water systems on the ground surface are deficient or land use is limited and the like; according to the utility model, fewer water outlet points of a natural water system can be reasonably utilized to form a complete drainage system.

The invention discloses a comprehensive drainage capacity expansion system suitable for a double-hole tunnel and a construction and operation method of the comprehensive drainage capacity expansion system, and belongs to the technical field of tunnel drainage systems. The system comprises a high-elevation tunnel and a low-elevation tunnel, the high-elevation tunnel is internally provided with an existing center circular pipe ditch A, the low-elevation tunnel is communicated with the high-elevation tunnel through a plurality of transverse channels, the low-elevation tunnel is internally provided with an existing center circular pipe ditch B and a newly-built drainage ditch, and the existing center circular pipe ditch A is communicated with the newly-built drainage ditch through a plurality of transverse channels. The newly-built drainage ditches are located between the transverse channels and the existing central circular pipe ditch B and communicate with the existing central circular pipe ditch B through drainage assemblies, transverse drainage branch ditches are arranged on the lower sides of the transverse channels correspondingly, one ends of the transverse drainage branch ditches communicate with the newly-built drainage ditches, and the other ends of the transverse drainage branch ditches communicate with the newly-built drainage ditches. And the other end is communicated with the existing central circular pipe ditch A through a connecting well. Through the comprehensive drainage system, the drainage capacity of the low-elevation tunnel and the high-elevation tunnel can be remarkably improved, and the driving safety in the tunnel and the reliability of the tunnel structure are ensured.

The invention relates to a debris flow gully slope protection structure, and relates to the technical field of water conservancy projects. Multi-stage counter-slope terraces are arranged on the slope surface of the debris flow gully slope from the bottom end to the top end, each terrace structure comprises a terrace surface, ridges and a terrace ditch which are arranged upwards at intervals along a contour line, each layer of counter-slope terrace is separated by using a mortar rubble retaining wall as the ridge, the terrace surface is covered with soil by using a slope native soil layer, and the terrace ditch is connected with the ridge of the next stage of terrace by adopting a mortar rubble material. The field surface has a reverse slope inclination angle of 5-10 degrees, and crops can be planted on the field surface. The field ditches are communicated with main drainage ditches on the two sides of the terrace along the contour line downwards, and metal gates are arranged at the joints to control water flow, are closed when water storage is needed and are opened when water drainage is needed. The structure can effectively reduce the material, construction and maintenance cost, has high debris flow resistance, can stabilize the debris flow channel slope, reduces the water and soil loss of the slope, plays a role in terrace water storage and drainage, and further protects and promotes the growth of crops.

The invention discloses a method for rapidly improving saline alkali soil by using urea phosphate. The method comprises the following steps: S1, preparation of a modifier: S1-1, preparation of a liquid modifier; s1-2, preparing a solid modifier; s2, excavating a salt elimination ditch; s3, drip irrigation salt elimination; and S4, deepening salt elimination. According to the method for rapidly improving the saline-alkali soil by using the urea phosphate, the liquid modifier and the solid modifier which are different in form act in the saline-alkali soil in a front-and-back matching manner, so that the physical and chemical properties of the soil can be improved, the organic matter content of the soil can be increased, the obstacle soil is suitable for plant growth, and the soil quality is improved. And the method is harmless to the environment and has wide economic and ecological benefits.

The invention relates to the field of specific calculation models, and discloses a natural regulation type salinized soil desalination simulation and multi-objective optimization configuration method, which comprises the following steps of: 1, data acquisition and earlier stage processing; 2, constructing a water and salt migration model; step 3, simulation analysis and scheme optimization; 4, carrying out substitution model training and multi-objective optimization; the final scheme is directly used for guiding engineering implementation, and specifically comprises the steps of determining the terrain adjustment amplitude, the position and depth of a drainage ditch, the micro-topographic relief scale, the earth filling and digging volume and shallow guide and drainage path configuration. The method has the beneficial effects that the natural drainage capacity of regional underground water can be remarkably improved, the effect that evaporation drives salt to move upwards is weakened, the rainfall infiltration capacity is improved, and the natural leaching effect is enhanced. The method is suitable for areas such as mud flats, salt pans and natural reserves where artificial engineering measures are not suitable to be taken, and has the advantages of low cost, high stability, ecological friendliness and the like.

The invention provides a low-hill mountainous area non-point source pollution intelligent prevention and control and gradient utilization system, and relates to the technical field of low-hill mountainous area agricultural non-point source pollution prevention and control. The system comprises a drainage ditch, a water quality on-line monitoring module, an intelligent gate, a multi-stage ecological ditch pond, a direct drainage channel, an internet-of-things intelligent management and control platform and a stepped rice field. The system drives the intelligent gate to perform diversion according to a pollution index threshold value based on monitoring data, high-pollution water enters the multi-stage ecological ditch pond to be purified, low-pollution water is discharged through the direct discharge channel, and purified tail water is reused for the cascade rice field. Self-flow conveying is achieved by means of the regional height difference, a collaborative prevention and control mechanism of process interception, tail end purification and resource recycling is constructed, scientific prevention and control of pollution, intelligent management and efficient utilization of resources are achieved, the non-point source pollution treatment effect is remarkably improved, and continuous circulation of water and fertilizer resources is promoted.

The application discloses a kind of quicksand layer open-pit mine slope landslide protection structures, including first fiber concrete layer, drainage ditch, dry channel, shallow grouting hole and second fiber concrete layer, first fiber concrete layer is sprayed in bottom slope surface;Drainage ditch is set on the slope bottom surface and extends along the length direction of slope;Dry channel outer end is extended to bottom slope surface and is connected with drainage ditch, and its inner end extends to bottom slope interior and is connected with underground water;Shallow grouting hole is filled with cement slurry, and cement slurry can permeate to bottom slope interior to fill the quicksand layer pore after dry underground water;Second fiber concrete layer is sprayed on the surface of first fiber concrete layer.Avoid to treat entire quicksand layer, greatly save the amount of work and construction period, construction is simple, construction cost is low, economy is good, also avoid groundwater erosion, soften sand layer, improve the self-stability of quicksand layer, especially the stability of upper slope.

The utility model relates to the technical field of drainage ditch overturning, and provides a thin seam drainage ditch overturning device which comprises a supporting plate, a connecting plate is fixedly connected to the side face of the supporting plate, a handle is fixedly connected to the side face of the connecting plate, a hanging ring is connected to the side face of the supporting plate in a sliding mode, and the hanging ring is fixedly connected to the side face of the supporting plate. The end, away from the supporting plate, of the connecting plate is fixedly connected with a base, and a turnover device is arranged on the side face of the connecting plate. According to the utility model, when the turnover device for the slit drainage ditch is used, a user firstly holds the handle to move the turnover device to the position near the slit drainage ditch to be turned over; according to the technical scheme, the lifting ring is connected with appropriate lifting equipment, in the overturning process, the water tank guide pulley rolls along the edge of the slit drainage ditch, it is ensured that the overturning device is stably and accurately overturned along the preset track, and through the technical scheme, the problem that in the related technology, the slit drainage ditch cannot be stably overturned is solved.

The protection structure comprises a main body and a shielding assembly, a first air inlet is formed in the top wall of the main body, the shielding assembly comprises a cover plate and a supporting piece, the cover plate is supported above the top wall through the supporting piece and is provided with a second air inlet staggered with the first air inlet, and the first air inlet is communicated with the second air inlet. And a drainage mechanism is further arranged on the main body, specifically, a drainage ditch surrounding the periphery of the first air inlet is arranged, falling rainwater is shielded by the cover plate, rainwater falling from the second air inlet is collected into the drainage ditch on the upper side of the top wall to be drained, it is avoided that the rainwater falls into the well through the first air inlet, and the rainproof effect of protecting equipment in the well is achieved.

The utility model relates to a kind of communication structures of plant area road drainage ditch.It is applicable to water supply and drainage technical field.The technical scheme adopted by the utility model is: a kind of communication structures of plant area road drainage ditch, plant area road is staggered arrangement, the drainage ditch is arranged in road side, with: water guide ditch, transversely arranged in road, water guide ditch two ends are respectively connected with the drainage ditch of two roads staggered arrangement;Guide block, along water guide ditch length direction arrangement is in water guide ditch, guide block top is made with the water guide groove being set along water guide ditch length direction;Cover plate, arrangement is in guide block, cover plate can cover the opening of water guide ditch;Backfill, fill in the position of guide block around in water guide ditch.

The utility model discloses an anti-slip cable trench comprising a cable trench main body which is provided with a cable trench; the drainage ditch is connected to the first side part of the cable trench main body, and the drainage ditch is provided with a drainage ditch groove; the number of the anti-skid bodies is multiple, the multiple anti-skid bodies are arranged at intervals in the length direction of the cable trench main body, each anti-skid body comprises a first anti-skid part connected to the first side part of the cable trench main body and a second anti-skid part connected to the bottom of the cable trench main body, the first anti-skid part is provided with a first drainage channel communicated with the drainage groove, and the second anti-skid part is provided with a second drainage channel communicated with the drainage groove. The second anti-skid part is provided with a second drainage channel communicated with the first drainage channel, and the second drainage channel is further communicated with the cable groove. The anti-slip cable trench can improve the anti-slip effect and reduce the risk of water accumulation.

This utility model discloses a prefabricated drainage ditch installation device with a guiding and positioning structure, comprising: a base layer, a bottom plate at the bottom of the base layer, and a support plate for supporting the whole; the inner surface of the base layer is filled with a layer of cement mortar, and the inner end of the upper surface of the base layer is provided with a plurality of positioning holes at equal intervals from front to back; the bottom end of the cement mortar layer is provided with a bottom plate, and the upper surface of the bottom plate is provided with adjustment grooves on both the left and right ends; the upper surface of the bottom plate is provided with side plates on both the left and right ends; the bottom outer end of the side plate is fixedly connected with a connecting protrusion, and the bottom upper surface of the side plate is provided with a connecting groove; the inside of the connecting groove is engaged with the bottom end of the support plate. This prefabricated drainage ditch installation device with a guiding and positioning structure can guide and position the drainage ditch before pouring cement into it, avoiding installation failure and material waste.

The present application relates to the technical field of tunnel construction, and particularly relates to a tunnel portal and tunnel body pipe shed construction method, step S1, portal side slope and portal drainage ditch construction is carried out, step S2, concrete arch is constructed in open cut section and buried section, step S3, step method is used for tunnel excavation, first, upper step arc-shaped guide pit is excavated, step S4, lower step excavation is carried out in staggered manner at a certain distance from the lag upper step working face, step S5, invert and tunnel bottom filling are poured at a certain distance from the lag lower step working face, and secondary lining construction is carried out after initial support, invert and tunnel bottom filling convergence; step S6, steps S4-S5 are repeated until tunnel construction is completed. The concrete arch is set, the concrete arch is used as a guide wall, the arch uses the existing soil layer as a formwork, so that the formwork setting difficulty is reduced, and the construction efficiency is improved.

The invention discloses a bottom plate and side wall separated assembly type concrete U-shaped groove drainage ditch, and relates to the technical field of municipal engineering and hydraulic engineering, a plurality of precast piles are installed in a groove, the precast piles are of a Z-shaped structure and are sequentially arranged in an attached mode, the end of each precast pile is provided with a reserved cavity, the reserved cavities are distributed in a pairwise clamping mode, and the precast piles are arranged in the groove. A longitudinal seam is formed above the attaching end of the reserved cavity, an arc-shaped seam is formed below the attaching end of the reserved cavity, the longitudinal seam and the arc-shaped seam are distributed in a staggered mode and connected through a transverse seam, an expansion rubber strip is embedded in the reserved cavity, and an expansion gasket is additionally arranged in the middle of the expansion rubber strip. The expansion gaskets are distributed on the inner sides of the transverse joints. The bottom plate and side wall separated fabricated concrete U-shaped groove drainage ditch disclosed by the invention has the effects of high use convenience and high work completeness.

The invention provides a hot water type uranium deposit underground heat damage cooperative prevention and control method, and belongs to the technical field of mine heat damage prevention and control, and the method comprises the following steps: S1, monitoring deposit geothermal heat damage data, and obtaining monitoring data of rock mass internal temperature, rock wall surface temperature, drainage ditch water temperature, air wind speed, environment temperature and humidity; s2, based on the monitoring data, calculating heat source heat dissipating capacity and dividing heat damage grades, predicting underground temperature field distribution of the mine, and dividing areas with different heat damage grades; and S3, according to the heat damage grade division, implementing at least one prevention and control means of underground excavation working face heat damage prevention and control, underground equipment heat dissipation prevention and control and operator individual heat damage prevention and control aiming at areas with different heat damage grades to form a cooperative prevention and control system. The cooperative system is formed by integrating three types of core prevention and control means, all-directional coverage of heat damage of different dimensions of an underground excavation working face, an equipment area, operators and the like is achieved, and the overall efficiency and economical efficiency of heat damage treatment are remarkably improved.

To provide a ground improvement method that forms a drainage channel from the upper surface side, instead of the slope surface, of a banking soil so as to form simply and strongly a drainage channel under the banked ground even in a narrow place in a mountainous area.SOLUTION: A ground improvement method according to the present invention includes: (1) providing a first excavation hole 1 by rotatively inserting an auger 10 from an upper surface of a banked ground in an underground direction and charging a drainage material 7 into the first excavation hole 1; then, (2) providing a second excavation hole 2 by rotatively inserting the auger 10 from the upper surface of the ground in the underground direction at a position in proximity to the first excavation hole 1 and charging the drainage material 7 into the second excavation hole 2; and (3) excavating a boundary region 3 between the first excavation hole 1 and the second excavation hole 2 by the auger 10 to communicate the first excavation hole 1 and the second excavation hole 2 with each other, and mixing the drainage material 7 in both holes to form a drainage 4.SELECTED DRAWING: Figure 2

This utility model relates to the field of concrete drainage ditches and discloses a slipform track structure for cast-in-place concrete drainage ditches. The structure includes an inner plate, an outer plate, and a transverse sleeve. Both the inner and outer plates are L-shaped and interlock. Sliding rods are fixedly connected to the inner sides of both the inner and outer plates, and rod holes are formed on the edges of both plates. These rod holes correspond to the sliding rods and are slidably engaged with them. Furthermore, sliders are fixedly connected to the upper corners of the same surfaces of both the inner and outer plates. This utility model, by designing the drainage ditch slipform track structure to allow adjustment of the width and side slope angle of the formed drainage ditch, avoids the limitations of existing drainage ditch slipform track structures, which use fixed templates and cannot freely adjust the width and side slope angle of the formed drainage ditch. This allows for the selection of more suitable specifications based on the changing conditions of the construction site.

The invention provides a farmland drainage ditch purification effect evaluation method and system based on the Internet of Things, and the method comprises the steps: collecting land surface temperature data, micro-deformation data and multispectral data of a farmland drainage ditch, and forming original purification time sequence data; time domain features, frequency domain features and spatial-temporal features are extracted from the original purification time sequence data, purification feature vectors are generated, the purification feature vectors are input into the three-layer progressive purification structure for inversion and cross validation, and internal state data and fitting purification indexes are obtained; comprehensive purification effect evaluation data is obtained through internal state data and fitting purification indexes, and a three-layer progressive inversion model is constructed on the basis of a traditional detection mode, so that self-adaptive optimization and precision of data in the evaluation process are realized, and the evaluation requirements of high precision and high real-time performance are met.

The utility model discloses a rectangular pipe jacking channel side wall drainage ditch structure, which relates to the technical field of underground structure engineering and comprises a prefabricated main body pipe joint, a suspended ceiling is arranged in the main body pipe joint, two symmetrically distributed haunch corners are arranged at the bottom end of the main body pipe joint, and a floor is arranged at one end, far away from the suspended ceiling, in the main body pipe joint. Two symmetrically-distributed off-wall walls are arranged between the suspended ceiling and the floor, the first ends of the off-wall walls are connected with the suspended ceiling, the second ends of the off-wall walls are connected with the floor, drainage assemblies are arranged between the off-wall walls and the side faces in the main body pipe joints, and the drainage assemblies are connected with the haunch corners. The embedded steel sleeve is prefabricated together with the main body pipe joint in a factory, site drilling is not needed, construction quality is guaranteed, site construction time is saved, construction efficiency is improved, the steel sleeve is embedded in advance, construction precision is improved, the structure of the main body pipe joint is not damaged, safety is achieved, site construction technology is simplified, and construction cost is reduced. And dust pollution is avoided, and energy conservation and environmental protection are achieved.

The field irrigation and drainage gate comprises a gate plate installed in a drainage channel, the gate plate ascends and descends through a height adjusting mechanism, limiting blocks are installed on the inner walls of the two sides of the drainage channel, and the gate plate is arranged between the two limiting blocks in an inserted mode. A composite protection plate is detachably installed on the side, close to the water source, of the gate plate, and the bottom and the two sides of the composite protection plate are in sealed connection with the bottom face and the inner walls of the two sides of the drainage channel correspondingly. The detachable composite protection plate is installed on the side, close to the water source, of the flashboard, water in the drainage channel is blocked through sealing of the composite protection plate and the side wall of the drainage channel, the water and the flashboard are blocked through the composite protection plate, the flashboard is prevented from being damaged due to corrosion of substances in the water, the service life of the flashboard is prolonged, direct replacement of the flashboard is avoided, and cost is reduced. And by utilizing the composite protection function of the composite protection plate, the service life of the composite protection plate can be prolonged, so that the maintenance cost is reduced, and the market prospect is wide.

This invention discloses a controlled drainage ecological regulation method for synergistic irrigation and drainage to reduce salinity and alkalinity, belonging to the field of soil remediation technology. The method includes: a soaking and dissolving stage, where, with the drainage outlet closed, low-flow irrigation is performed at the farthest point from the drainage ditch, allowing a large amount of irrigation water to enter the small pores of the soil profile and soak and dissolve salts; a diffusion and dispersion stage, where the drainage outlet is raised, and with the outlet height lower than the field surface, large-flow irrigation is performed evenly, filling all pores of the soil profile with irrigation water and enhancing the diffusion and dispersion of salts; a convection desalination stage, where the drainage outlet is opened, and with the outlet depth level with the drainage ditch depth, saline water is evenly discharged from the soil; and a water-saving and emission-reduction stage, where the drainage outlet depth is lower than the crop root zone, breaking the connectivity of small pores and preventing soil salts from moving upwards during crop growth. This synergistic irrigation and drainage achieves the three major goals of salt control, water conservation, and emission reduction.

The utility model discloses a drainage hole with a function of preventing blood vessels from adhering to the wall. The drainage hole comprises a drainage hole body, an anti-injury block, a supporting ring, a drainage ditch and an arc-shaped cannula adhering face. A gap between every two adjacent damage blocks is a drainage ditch; each anti-damage block consists of an anti-damage table, an access slope, an access arc, an anti-damage arc I and an anti-damage arc II, wherein the anti-damage table is positioned at the upper part of the anti-damage block; the access slope is located outside the anti-damage block; the access arc is in transition connection between the access slope and the anti-damage table; the anti-damage arc I is positioned on the inner side of the anti-damage block; the anti-damage arcs II are located on the two sides of the anti-damage block. According to the utility model, the drainage holes can be effectively prevented from being blocked by endangium, so that the following problems are avoided: the treatment effect is reduced or even interrupted due to sudden drop of drainage quantity, and the life of a patient is endangered; due to the fact that drainage holes are blocked by endangium, the endangium is injured due to the high pressure difference between intravascular equipment and extracorporeal equipment; endovascular injury generates thrombus which endangers the life of a patient.

The utility model relates to a drainage structure, in particular to a side slope drainage ditch structure which comprises an intercepting ditch and / or a side ditch arranged on a side slope, a self-dredging mechanism is arranged on one side in the intercepting ditch and / or the side ditch and comprises a water storage pool, a mud blocking wall is arranged on the top of the side wall of the side, facing the upstream side of the side slope, of the water storage pool, and the mud blocking wall is arranged on the side wall of the water storage pool. A hole is formed in the mud retaining wall, and a filtering device is arranged on the hole; a movable flashboard is arranged on the side wall of the side, facing the catchwater and / or the side ditch, of the reservoir, a floating ball is arranged in the reservoir, one end of a traction rope is connected with the floating ball, and the other end of the traction rope is connected with the movable flashboard through a pulley block. The anti-seepage drainage device is simple in structure, good in adaptability, good in anti-seepage drainage effect and low in maintenance cost, and has a self-dredging function.

The utility model relates to the technical field of building construction, and discloses a basement side wall anti-drainage combined structure during reverse building method construction, which comprises clay, a P8 anti-seepage grade continuous wall serving as a side wall is arranged on the inner wall of the clay, one side of the P8 anti-seepage grade continuous wall serving as the side wall is provided with spraying concrete for leveling, and the other side of the P8 anti-seepage grade continuous wall serving as the side wall is provided with spraying concrete for leveling. A waterproof agent is arranged on the side, serving as the side wall, of the P8 impervious grade continuous wall, a waterproof coating is arranged on the inner wall of the P8 impervious grade continuous wall, a cement mortar protection layer is arranged on the inner wall of the P8 impervious grade continuous wall, a waterproof cement fiber wall plate is arranged on the side, serving as the side wall, of the P8 impervious grade continuous wall, and the waterproof cement fiber wall plate is arranged on the side, serving as the side wall, of the P8 impervious grade continuous wall. According to the utility model, through a mode of combination of prevention and drainage, the leakage rate of the side wall is reduced through a reverse construction method, the maintenance cost is reduced, the structure durability and the wall surface flatness are both realized, the waterproof effect is improved, and the construction cost is reduced. And the service life of the building is prolonged.