35results about How to "Avoid scour damage" patented technology

The invention discloses an overflow dam with dam face cantilever sills for current diversion and energy dissipation. The tank bottom of an energy dissipation tank is connected to the rear part of an overflow slop of the overflow dam. A protection side wall of the energy dissipation tank is connected to the rear part of a side wall of the overflow slope. A plurality of gate piers used for dividing a fluid flow-by area into a plurality spillway are arranged on the dam top of the overflow dam. The overflow slope of the overflow dam is provided with a plurality of current diversion cantilever sills distributed in a spaced manner, so that one part of water current coming from the spillways flows through the upper sill surfaces of the cantilever sills and enters the rear area of the energy dissipation tank in a form of cantilever current while the other part of water current flows into the front area of the energy dissipation tank through flow channels between each two cantilever sills and achieves energy dissipation through dispersion of the water current entering the energy dissipation tank. The energy dissipation mode provided by the invention is totally different from those in the prior art and is distinct in energy dissipation effect.

The invention belongs to the field of side slope and bank slope protection engineering, and discloses an anti-seepage and anti-freezing protection system for bank and side slopes of a reservoir in a cold region. The anti-seepage and anti-freezing protection system comprises a foundation embedded in the side slope. A gravel cushion layer, a composite anti-drainage plate and a Renault protection padare sequentially laid from inside to outside on the slope surface of the side slope from the foundation to a set height of the side slope, wherein the set height of the side slope is higher than a surge water level. The anti-seepage and anti-freezing protection system further comprises one-way drainage pipes, wherein the one-way drainage pipes comprise a bottom one-way drainage pipe and a top one-way drainage pipe. The water inlet section of the bottom one-way drainage pipe penetrates through the foundation and extends into the side slope. The water inlet section of the top one-way drainage pipe penetrates through the Renault protection pad, the composite anti-drainage plate and the gravel cushion layer sequentially and extends into the side slope. The invention further discloses a construction method of the anti-seepage and anti-freezing protection system for the bank and side slopes of the reservoir in the cold region. The anti-seepage and anti-freezing protection system is simple in structure, reliable in function, convenient to construct, long in service life, and capable of effectively preventing erosion damage and seepage damage to the bank and side slopes of the reservoir,greatly weakening freezing and thawing damage to the side slope, and ensuring long-term stability of the bank and side slopes of the reservoir.

The invention discloses a core-wall rockfill dam comprising gabions, self-compacting concrete, upstream geotextile, downstream geotextile, an upstream rockfill area, a downstream rockfill area, a copper sheet water stop, a concrete base, a grouting gallery and the like. The self-compacting concrete replaces a traditional clay core wall or bituminous concrete core wall. The gabions and the geotextile are used for replacing a traditional transition area. The gabions are utilized to achieve the functions of stabilizing and protecting the core wall. By means of the watertightness of the geomembrane, the seepage-proof function is achieved. According to the core-wall rockfill dam, the type is simple, dam body section partitioning is optimized, the construction speed is rapid, construction interference is little, and construction and later-period overhauling are convenient.

The invention discloses a three-dimensional comprehensive afforestation system of an ecological factory. The three-dimensional comprehensive afforestation system comprises vegetation boxes, water storage tanks, supporting plates, engaging plates, rib plates, water inlet pipes, change-over pipes and connectors, wherein the supporting plates are arranged on the outer surface, vertical to a wall body, of a building; the plurality of layers of supporting plates are arranged; the rib plates are arranged below the supporting plates; one end of each rib plate is connected with the corresponding supporting plate and the other ends of the rib plates are connected with the wall body; the vegetation boxes are arranged on the supporting plates; the vegetation boxes are fitted with the wall body; each vegetation box is internally provided with a plant culture medium; the water storage tanks is arranged at openings of the vegetation boxes; the engaging plates are vertically arranged; the upper ends of the engaging plates are connected with the bottom surfaces of the supporting plates and the lower ends of the engaging plates are connected with the vegetation boxes on a lower layer; and the lower end of the engaging plate at the bottommost part is connected with the ground. According to the three-dimensional comprehensive afforestation system, the water inlet pipes are arranged and a water supply pipeline or a roof water drainage pipe is connected; rainwater is stored in the afforestation system, so that pressure of an urban water drainage system is alleviated; and meanwhile, the rainwater is recycled and the effect of a sponge city is realized.

The invention relates to a seedling culture method, in particular to a one-film double-greenhouse seed seedling culture method for wild alpine roses.A thin film is firstly laid in a built nursery pond, a seedling culture substrate is laid on the thin film, the nursery pond is built in a greenhouse, and a small shed is constructed on the nursery pond.According to the method, soilborne diseases can be effectively prevented, germination of weeds on the ground is effectively prevented, meanwhile, water seepage can be prevented, and an ideal moisture preservation effect is achieved.A double-greenhouse structure can effectively carry out heat preservation and moisture preservation, and it is avoided that condensation water drops on greenhouse roofs scour and damage seeds.The seedling culture method is easy to operate, the requirement for the conditions of facilities is not high, cost is low, the effect is good, the seeds do not need to be subjected to germination accelerating, and the emergence rate can reach 95% or above.

The invention provides a short platform preventing water flow oblique injecting of an outlet of a pressurized flood discharging radial gate and belongs to the field of water resources and hydropower engineering. The short platform comprises a platform, a supporting structure and a bottom cavity. The front end of the platform is connected with a water stop platform of a water outlet in the bottom end of the radial gate, and the supporting structure is located at the bottom of the platform. The bottom cavity is formed in the bottom of the platform, and the left side and the right side of the front end of the bottom cavity communicate with ventilation holes. By means of the short platform, water flow downwards and obliquely injected through the radial gate falls on the platform, and the phenomenon that the water flow impacts a bottom plate with a large oblique injecting angle for a long time, and the bottom plate is scoured and damage is avoided; in addition, due to the fact that the oblique injecting water flow falls on the platform only through a very short distance when the radial gate is locally opened, and the impact force of the oblique injecting water flow on the platform is far smaller than the impact force of the oblique injecting water flow directly impacting the bottom plate. The water flow is horizontally injected out from the platform, the length of the bottom cavityis greatly increased, and the bottom gas seepage effect is improved; and the phenomenon that the bottom cavity is short, water flow gas seepage is insufficient, and cavitation erosion damage is causedis avoided.

The invention relates to the technical field of stabilization of side slopes or slopes, and discloses a degradable side slope water and soil conservation pile, system and method using local materials. Grass and trees are collected from the periphery of a to-be-treated side slope, crushed and dried, and then glue is added on site for hot pressing to form the water and soil conservation pile for water and soil conservation for water and soil conservation. The problem that materials are difficult to transport is solved, and the cost is extremely low; Biomass forming the water and soil conservation pile comprises wood chips playing a role in connection and weeds, straw, leaves, seaweed and other substances playing a role in degradation. The wood chips are effectively bonded with each other to form a latticed structure, so that the water and soil conservation pile has certain strength, substances such as crushed weeds and the like form a large number of weak points facilitating entry of hyphae and plant root systems on the water and soil conservation pile due to poor bonding, so that the water and soil conservation pile can be degraded after vegetation and fungi on the borrowed soil slope grow, and nutrients can be provided for the vegetation after the water and soil conservation pile is degraded.

The invention relates to an anti-scouring high-pressure adjusting valve capable of achieving sealing and adjusting staggering. The anti-scouring high-pressure adjusting valve comprises a valve body and a staggered opening and closing structure; the staggered opening and closing structure comprises a valve cover and a valve rod which are arranged in the valve body, a valve cage is provided with a plurality of throttling windows, and a valve clack ascends and descends along with the valve rod to enable the lower side end of an upper adjusting pair to be matched with the throttling windows so as to adjust the flow of a medium in a flow channel; and the outer wall of the lower end of a lower sealing pair of the valve clack is provided with a sealing face A matched with the valve seat in a sealing manner, the inner wall of the upper end of the valve seat is provided with a sealing face B matched with the sealing face A, and the outer wall of the upper adjusting pair is provided with a plurality of flow balance holes. The anti-scouring high-pressure adjusting valve has the following advantages that by means of the structural form that sealing and flow adjustment are staggered among the valve clack, the valve cage and the valve seat, washing of media to the sealing faces is avoided, and meanwhile the pressure in a cage cover is balanced, so that the stability of vertical lifting operation of the valve rod is guaranteed.

The invention discloses a small village highway bridge reconstruction and reinforcement method. A reinforcement module is included. The reinforcement module comprises an under-bridge reinforcement module and an on-bridge reinforcement module. The under-bridge reinforcement module comprises a water and soil protection module, a pile foundation enlargement module and a pile cap repairing module. Theon-bridge reinforcement module comprises a bridge deck expansion module, a bridge deck strengthening module and a monitoring module. The water and soil protection module comprises a gabion protectionmodule and an embedded wall building module. The pile foundation enlargement module comprises a cleaning module, a dabbing module and a strengthening module. The embedded wall building module comprises an embedded wall. The pile cap repairing module comprises a new pile cap which is built under water and an old pile cap. According to the invention, scouring and damage to a pile foundation by currents are avoided, forced sedimentation is conducted under piers, thus water and soil are effectively conserved, the pile foundation is avoided being emptied, the cost of reinforcement is lowered, thepile foundation is effectively improved, the weight of passing vehicles is detected, damage to the bridge by overweight vehicles is effectively avoided, and thus the maintenance cost of the bridge islowered.

The invention discloses a combined drainage system suitable for drainage of a weakly permeable soil layer slope, which is formed by combining a three-dimensional drainage system, a vacuum drainage assisting system and a siphon/direct drainage system, the three-dimensional drainage system comprises a horizontal drainage floral tube (8), a vertical drainage floral tube (17) and a water collecting well (5), and the vacuum drainage assisting system comprises a vacuum pump (11) and a vacuum exhaust tube (10). The siphon/direct drainage system comprises a self-flow direct drainage mode and a siphon drainage mode, the direct drainage system comprises a water guide hole and a direct drainage pipe (21), the siphon drainage system comprises a deep-well pump (12), a siphon (15) and a siphon water supplementing pipe (13), the deep-well pump (12) is installed at the bottom of the water collecting well (5), and the water inlet end of the siphon (15) extends into the lower portion of the water collecting well (5) along the inner wall of the water collecting well (5). The method can effectively realize smooth and concentrated drainage of weak-permeability soil layer slope underground water, prevents slope surface soil layer saturation and erosion damage, and improves the lasting stability of the slope.

The invention relates to a secondary gas source protective magnetic pump device suitable for conveying a particle-containing impurity medium. The secondary gas source protective magnetic pump device comprises a water conservancy over-flow unit, a magnetic drive unit and a secondary gas source protective unit between the water conservancy over-flow unit and the magnetic drive unit, wherein the water conservancy over-flow unit comprises a pump body, an impeller, a pump cover and a pump shaft; a pump cavity is formed between the pump body and the pump cover; the impeller is positioned in the pumpcavity and is connected on the pump shaft; the pump shaft passes through the pump cover and the secondary gas source protective unit, and is connected with the magnetic drive unit; a secondary impeller is arranged on the pump shaft between the impeller and the pump cover; a front baffle cover is arranged between the impeller and the secondary impeller; and a spiral pumping ring is arranged between the pump shaft and the pump cover. Compared with the prior art, the secondary gas source protective magnetic pump device has the advantages of being long in service life, safe and reliable, wide inrange of application, good in sealing performance, and the like.

The invention discloses a device and a method for controlling chemical fertilizer non-point source pollution in a paddy field, and relates to the technical field of environmental engineering. The problem that the flushing of farmland overflow water to an artificial wetland cannot be effectively reduced during rainfall is solved. The device comprises a farmland, a wetland is arranged around the farmland and communicates with the farmland through an overflow channel, an emptying port is formed in the lower part of the overflow channel and connected with an emptying pipe, a valve is installed on the emptying pipe and used for being opened when the water level of the wetland reaches the designed upper limit value, a liquid level pipe is installed on one side of the wetland, one end of the liquid level pipe communicates with the lower end in the wetland, the other end of the liquid level pipe is arranged on one side of the upper part of the wetland, a pressure switch is installed at the bottom in the liquid level pipe, the valve is an electromagnetic valve, and the pressure switch is in communication connection with the electromagnetic valve. The device is simple in structure, overflow water can be diverted when the overflow water of a farmland exceeds the upper limit of wetland treatment, the situation that the treatment capacity of the wetland is reduced due to the fact that the wetland is washed and damaged is avoided, the remediation and maintenance cost of the wetland is reduced, and non-point source pollution can be controlled easily.

Disclosed is a cascaded type zero-leakage valve interior assembly. The lower end of a guide sleeve is connected with an upper sleeve in a butting mode. The external diameter of a large valve element is matched with the internal diameter of the upper sleeve. A circumferential groove is formed in the inner side of the lower end of the guide sleeve, and a sealing ring which makes contact with the upper end of the upper sleeve and the large valve element is arranged in the circumferential groove. A valve element cavity is formed below the top wall of the large valve element, a disk spring is arranged in the valve element cavity, and the lower end of the disk spring makes contact with a small valve element. The small valve element is divided by a sealing surface into an upper portion and a lower portion, the upper portion of the small valve element is located in the valve element cavity, a circumferential groove is formed in the side wall of the upper portion of the small valve element, and a sealing ring is arranged in the circumferential groove. The internal diameter of an opening formed in the top end of a lower sleeve is smaller than that of the upper sleeve, a circumferential groove is downwards formed in the top end of the lower sleeve, a soft valve seat is arranged in the groove, the outer ring of the soft valve seat is kept making contact with the lower end of the upper sleeve, and the width of the inner ring of the soft valve seat is larger than the wall thickness of the lower end of the large valve element. According to the cascaded type zero-leakage valve interior assembly, a dual-sealing structure with a protecting function is adopted, a soft seal is closed after a hard sealing surface makes contact with water, and therefore internal leakage of a valve can be effectively avoided, and the scour damage to a soft sealing surface in a short period can be avoided.