162 results about "Canal lock" patented technology

The invention relates to a water adding system of a ship lock and a construction method thereof. A technical problem to be solved is to provide a water adding system of the ship lock and a construction method thereof. The water adding system has the advantages of high energy dissipation efficiency, full utilization of lock head space, even water level surge height, favourable current joining condition and simple structure, can effectively solve energy and flow state distribution of high-speed current, and can expand new research field for design and type selection of moderate lift lock water delivery system. The technical scheme solving the problem is as follows: the water adding system of the ship lock comprises a lock head baseplate, lock head side blocks, a lock chamber baseplate and a lock chamber. The water adding system is characterized in that a water blocking wall and a lock head screen wall are connected between the lock head side blocks on two sides; a group of tongue-flap shape water inlets with vertical fall are arranged between the water blocking wall and the lock head screen wall; an annular water delivery corridor communicating the water inlet with the lock chamber is arranged in the lock head side block, and an energy consumption chamber is arranged between the outlet end and the water inlet of the annular water delivery corridor. The invention is mainly suitable for water conservancy and hydropower engineering and water transport traffic engineering.

The invention discloses a combined dispatching simulation and analysis method for multi-line parallel locks. The combined dispatching simulation and analysis method comprises the following steps: (1) determining the initial condition for combined lock dispatching simulation; (2) determining the navigation route and the position of a potential collision area; (3) establishing a lock running state mathematical model; (4) establishing a fleet movement mathematical model; (5) analyzing the lock running efficiency and the traffic condition of the collision area. According to the invention, the ship lockage dispatching is taken as the operations of two objects, namely locks and ships, and is adopted to establish the lock running state mathematical model and the fleet movement mathematical model, and mutual restriction of the two models is realized through the dispatching condition, so that during analysis on the running states of the multi-line parallel locks and the traffic condition of the navigation collision area, mutual effects between locks, locks and ships, and ships can be calculated and analyzed in the combined dispatching process of the multi-line parallel locks so as to provide reliable reference for the traffic organization in the combined dispatching process of the multi-line parallel locks.

The stepless speed varying control method for hydraulic on / off machine with high pressure and great flow rate in huge navigation lock, such as that in Yangtze Gorges hydro complex, is used mainly in controlling the water conveying valve, and features that one high pressure and great flow electro-hydraulic proportion plunger pump is used as the basic element combined with the integrated control structure of two-way inserted valve based on 'fluid lock theory' to constitute the stepless speed varying control on the water conveying valve and the A-shaped gate of the huge navigation lock. The control system has water conveying valve on / off machine hydraulic control loop comprising motor-pump combinations and two-way inserted valve. The present invention has accurate and reliable control and smooth running in controlling the great inertia load of the permanent navigation lock, and excellent steady and dynamic characteristics.

The invention discloses a system for program control circulating jet flow and fish inducing by program control circulating light change for a ship lock or a ship lifting machine. The system comprises a downstream approach channel side wall inner wall, a ship lock chamber or ship lifting machine ship holding box side wall inner side wall, a program control circulating jet flow fish inducing device arranged on the side wall inner wall in a certain range of an upstream approach channel and a program control circulating light change fish inducing light, and consists of a main pipeline, a boost pump and a program control electromagnetic valve jet flow pipe (LED light arranged at the outer periphery of a pipe port, program control circulating light control). Based on a traditional navigation building, the system is newly built or transformed to achieve the effect of fishes passing through a dam from downstream to upstream in normal use process of navigation facilities, protects the river fish ecology, reduces the fish passing water consumption and the energy consumption, and realizes the purposes of reducing the engineering investment, reducing the operation cost and giving consideration to engineering and ecological and environmental benefits.

The invention provides a bottom plate transportation type bridge passing ship lock. The ship lock is arranged in a river channel under a bridge and comprises an upstream lock, a midstream lock, a downstream lock, an upstream lock chamber, a downstream lock chamber and a water pumping device, wherein conveying rails are arranged at the tops of edge walls of the two lock chambers respectively; each conveying rail is internally provided with two hoists; a transportation rolling wheel is arranged at the bottom of each hoist; the hoists can move in the corresponding conveying rails through the corresponding transportation rolling wheels; a lifting rope which vertically falls into water is arranged on the side face, facing the corresponding lock chamber, of each hoist; and the lifting ropes are fixedly connected with a transportation bottom plate. By virtue of the bottom plate transportation type bridge passing ship lock, the water amount needing to be pumped in a ship navigation process is reduced, the electric quantity consumed by pumping water is reduced and the time spent on pumping the water is shortened; and the ship navigation efficiency is improved and the navigation time is shortened.

The invention relates to a method for relieving the body-type cavitation of a suddenly-enlarged gallery for ship locks and particularly relates to a method for relieving the sill-lifting cavitation of a suddenly-enlarged gallery for high-lift ship locks. The method is characterized in that a position to which a flow separation occurs on a sill-lifting curved surface is provided with a sill-lifting aeration device, the sill-lifting aeration device is an aerating groove or is formed by connecting an aerating sill with an aerating groove, the inside of the aerating groove is provided with a ventilating pipe communicated with the top of a lock, the top of the ventilating pipe is also connected to an air compressor by connecting a branch pipe, and the branch pipe is provided with a valve; and when the negative pressure exerted on the rear low-pressure area of the sill-lifting aeration device is large enough to automatically suck air into water, the ventilating pipe is communicated with the atmosphere so as to realize natural ventilation, otherwise, air is added into the sill-lifting aeration device by using the air compressor so as to achieve the purpose of relieving the downstream sill-lifting and gate-slot cavitation of the sill-lifting aeration device.

The invention relates to an L-shaped unilateral lock wall structure and a construction method. The invention aims to solve the technical problems of reconstruction and extension ship lock engineering and ship lock engineering with bedrock shore side and narrow arrangement width. The L-shaped unilateral lock wall structure is provided with a unilateral lock wall in an L shape and a lock chamber bottom plate. The L-shaped unilateral lock wall structure is characterized in that a concrete lining wall is arranged on the upright surface of the rock side slope opposite to the unilateral lock wall; the concrete lining wall and the unilateral lock wall form a bilateral lock wall in an integral structure; a water delivery main gallery is arranged in the unilateral lock wall, and a group of energy dissipater structures are formed above the lock chamber bottom plate by mounting a lock chamber top plate; a transverse branch gallery communicated with the water delivery main gallery is arranged between the adjacent energy dissipater structures, and the upstream side and the downstream side of the transverse branch gallery are provided with water outlets. The invention is applied to water conservancy and hydropower engineering and water transportation engineering.

The invention provides a flow diversion and isolation dyke and a flow diversion method thereof. The flow diversion and isolation dyke comprises a plurality of supporting sets. An insert plate is connected to the position between every two adjacent supporting sets. Each supporting set comprises a first connection pier and a second connection pier. One insert plate is arranged between every two adjacent supporting sets. The flow diversion and isolation dyke has the beneficial effects that the navigation flow condition of an entrance area of an approach channel of a ship lock is improved, and bad flow states of boil-eddy and turbulent flow are effectively avoided; the insert plates are divided to be straight insert plates and curve insert plates, in this way, construction can be conducted according to different actual situations; the flow blocking and guiding modes are adopted to weaken oblique flow at the entrance area of the ship lock so as to ensure safe navigation of a ship; the insert plates are inserted to the connection piers and can be replaced conveniently.

The invention provides a water-saving layout structure of a parallel double-line huge navigation lock water conveyance system, and a water conveyance method of the water-saving layout structure, and belongs to the technical field of navigation building hydraulics and navigation lock water conveyance system hydraulics. The water-saving layout structure comprises two parallel navigation locks, wherein longitudinal water conveyance galleries are arranged at the bottoms of lock chambers of the navigation locks; water inlets and water outlets are formed in the upstreams and the downstreams of the longitudinal water conveyance galleries, and are communicated with upstream and downstream navigation approach channels; the middle parts of the longitudinal water conveyance galleries of the two lock chambers are connected by two transverse communicating galleries; valves for controlling the on-off between the two longitudinal water conveyance galleries are arranged on the transverse communicating galleries; a plurality of transverse water conveyance branch holes are formed in the two sides of the longitudinal water conveyance galleries, and are communicated with the lock chambers of the navigation locks; and at least one barrier is arranged in the length directions of the lock chambers on the outer sides of the transverse water conveyance branch holes. The water-saving layout structure and the water conveyance method have the significant advantages that the operation water consumption of the navigation locks is saved; each stage of working head is lowered; operation conditions of water conveyance valves are improved; water flow conditions of the lock chambers and the navigation approach channels are improved; and the construction is facilitated.

The invention discloses an anti-silting method for a ship lock passing through a high-sand-content large-fall river channel. The device comprises a ship lock, a gate, a lock bottom, a water inlet gateand a water outlet gate, the gate is characterized in that a through gate width whole course is arranged below the gate; independent turn-off and turn-on, the transverse linear water inlet gate and the water outlet gate synchronously move along with the gate; water in the ship lock is injected and discharged; all the operations are realized through a water inlet gate and a water outlet gate; compared with the prior art, the ship lock has the technical advantages that the water injection and drainage processes in the ship lock pass through the linear gate; mainly, horizontal torrent flows in and out along the bottom of the lock to wash sediment settled at the bottom of the lock to enter a suspension state again to be released from the ship lock. Meanwhile, the lock is opened and closed after the water injection and water release processes are completed, resistance of static pressure and dynamic pressure is avoided, and the valve is opened more smoothly in an energy-saving mode.

The invention provides a multifunctional ship lock combined with a fishway, and an operation method thereof, and belongs to the technical field of hydraulic engineering equipment and machinery. The multifunctional ship lock comprises an upper lock head, a lower lock head and a lock chamber section, rotary gates are arranged at the upper lock head and the lower lock head respectively, each rotary gate comprises an arc-shaped gate, a gate leaf, a main shaft connected with the gate leaf, a circular cover plate, a supporting disc and a force-bearing telescopic rod capable of adjusting the gate toascend and descend, and the force-bearing telescopic rods are hydraulically driven. The gate leaf is provided with a blade grid with an adjustable opening degree so as to adjust the flow speed of water flow and achieve the fish luring effect. Gear mounting components are arranged at the upper ends of the force-bearing telescopic rods and can adjust and control rotation and lifting of the rotary gates. Lifting grooves are formed in the lock heads of the ship lock, and the rotary gates are controlled by the hydraulic drive telescopic rods to partially settle in the lifting grooves when navigation, flood drainage and the like are needed. The fishway and the ship lock are combined into a whole, so that the cost is saved; and multiple functions of fish luring, rotary fish expelling, navigation,water retaining, flood draining and the like can be achieved.

The invention discloses an engineering structure for improving water and sediment conditions of a lock chamber of a lock multi-section dispersive water conveyance system, which comprises a branch galleries and lock chamber water outlet holes arranged in the branch galleries. The end-to-end joint of each two adjacent branch galleries is respectively provided with an auxiliary water outlet gallery. Each auxiliary water outlet gallery is of a U shape or a rectangular shape. The minimum inundated depth at the top of each gallery is not less than the sill depth of a lock. The side walls of the auxiliary water outlet galleries are provided with a plurality of water outlet holes. Due to the adoption of the engineering structure, the uniformity of effluent in the lock chamber is effectively improved and the sediment deposition can also be prevented. Moreover, the engineering structure has simple structure and is convenient to construct, the operation and maintenance cost is obviously saved, and the engineering structure has good application prospect.

The invention discloses a high-dam fish transporting device based on a ship lock water conveying system and an operation method and belongs to the crossing field of ship lock engineering and ecological protection. The device comprises a water conveying pipeline, a fish lifting well, a fish lifting assembly, an upstream fish passing channel and a downstream fish passing channel. The water conveyingpipeline and a ship lock chamber are arranged in parallel and are arranged behind an irrigation valve and in front of a drainage valve; the fish lifting well is connected with the water conveying pipeline through an energy dissipation assembly, connected with the downstream fish passing channel through a lower gate and connected with the upstream fish passing channel through an upper gate. The fish lifting assembly is arranged in the fish lifting well and composed of a net plate and buoys, at least three buoy wells which are communicated with the fish lifting well and used for containing thebuoys are evenly distributed in the circumferential direction of the fish lifting well, and the net plate is arranged in the fish lifting well and connected with the buoys. According to the invention,a ship lock water conveying system suitable for the high-water-head condition is combined with fish lifting, and irrigation and drainage are synchronously implemented on the fish lifting well in theship lock irrigation and drainage process, so the water level of the fish lifting well is changed, and therefore the buoys ascend and descend, and then the net plate is driven to vertically move to achieve the purpose of fish transporting.

The invention relates to a continuous multi-step ship lock operation stage number conversion method, in particular to a method for adaptively realizing ship lock operation stage number conversion of amulti-step ship lock under the condition of water level change. The method comprises: according to the conditions met by normal operation of the multi-stage ship lock and in combination with the operation process of the multi-stage ship lock, establishing a continuous multi-step ship lock stage changing operation model; substituting the detected water level data into the model to calculate the final steady-state water level of each stage of lock chamber after the stage change operation; automatically determining the conversion stage number required by ship lock operation to obtain a continuous multi-step ship lock stage changing operation scheme; using optimal arrangement of a ship lockage process and in combination with a ship lock control system and a synchronous water conveying operation mode, further optimizing the specific implementation scheme of operation stage number conversion of the multi-stage ship lock according to actual requirements, achieving conversion of the operation stage number of the ship lock, standardizing the operation process of ship lock operation management personnel, and improving the efficiency and safety of stage changing operation of the ship lock.

The invention belongs to the technical field of navigation building hydraulics, and discloses a lock head and pocket floor permeable shunting navigation structure of a paratactic navigation lock. The width of the shunting navigation structure is gradually reduced to the end from a lock head to an approach channel direction; the end of the shunting navigation structure has a solid arc structure; the arc of the arc structure is tangent with connection lines on two sides; the upper part of a portion between the end of the shunting navigation structure and the lock head is in a solid structure capable of completely partitioning water flow of the double-line navigation lock; and the lower part of the portion between the end of the shunting navigation structure and the lock head is in a permeable structure capable of permeating water. The lock head and pocket floor permeable shunting navigation structure has the outstanding advantages of improving the approach channel water flow condition, improving the ship scheduling flexibility, saving engineering investment and being convenient to construct.

The invention provides a water body internal circulation yacht harbor basin, and a ship lock for the water body internal circulation yacht harbor basin. The ship lock comprises a lock chamber, an inner lock gate and an outer lock gate, as well as a water conveyance system, wherein the lock chamber and the closed harbor basin are isolated by the inner lock gate, and the outer lock gate is used for isolating the lock chamber from an external water body; and the water conveyance system is used for injecting water of the closed harbor basin into the lock chamber, and sending the water in the lock chamber back to the yacht harbor basin. According to the water body internal circulation yacht harbor basin, the harbor basin is arranged in a land area, office, convention and exhibition facilities, apartment hotels, shipping entertainment and commercial facilities can be built around the harbor basin through communicating the lock chamber with the external water body, and the ship lock, namely, the traditional navigation hydraulic architecture, is landscaped.

The invention provides a multi-layer multi-hole intercepting and pollutant discharging water conveying port comprehensive structure. A water conveying channel is built along a coastline, the water conveying channel has advantages that construction cost is low, conveying distance is long, land acquisition coordination is easy, however, passing of a port along the coastline is the most difficult. According to the multi-layer multi-hole intercepting and pollutant discharging water conveying port comprehensive structure, the bottommost layer is provided with a fresh water conveying layer and can pass through a port channel by means of a box culvert, a tunnel and the like, the culvert top or the tunnel top is located below the channel water level depth line, and a water conveying gate is arranged and used for segmented pollutant interception, segmented water level regulation and storage, automatic dredging and the like of the long-distance water conveying channel; the middle layer is provided with a channel layer, is provided with a flood discharge tidal gate and is a navigation layer; and the dyke top is provided with a bridge layer, and the requirements of vehicle traffic are met. Onthe plane, if flood and tide prevention gates or ship locks exist at the port, the flood and tide prevention gates or the ship locks are arranged close to the river channel side and are properly separated from a water conveying tunnel culvert, in this way, the whole port is arranged in a saving and separating mode, and meanwhile the comprehensive functions of water conveying, vehicle traffic, shipping, flood prevention, tide prevention, operation and maintenance, interception, pollution discharge, regulation and storage and the like are achieved.

The invention provides a ship lock flowing water valve closing process debugging method capable of shortening water filling time. The method comprises the following steps that 1, the water level in alock chamber is flush with the downstream water level, a downstream miter gate is closed, and a drain valve is closed; 2, a water filling valve is opened to fill water until the water filling valve isin a fully open state; 3, when the residual water head value reaches H, a water filling valve is started to be closed, when the water filling valve is closed to the opening degree n, the valve closing action is stopped, water filling is continued till the water level of the lock chamber is flush with the upstream water level of the ship lock, the miter gate is opened to the end of opening, and the waiting flush time delta(t) value and the inertia ultrahigh value delta(h) are calculated; 4, according to the delta(t) value and the delta(h) value, the remaining water head value delta(H) or the valve closing opening value delta(n) of the water filling valve is adjusted; 5, repeating the step 1 and the step 3 for debugging by adopting the adjusted delta(H) and n values, and synchronously calculating delta(t) and an inertia ultrahigh value delta(h). The process for closing the valve by moving the water in advance of the valve can ensure the running of the miter gate and the berthing safetyof a lock chamber ship, and can shorten the water filling time.

The invention relates to a ship lock valve anticavitation technology, and in particular relates to a comprehensive method for anticavitation of an ultrahigh water head ship lock valve higher than 40m. The invention comprises a water delivery valve, wherein the bottom of the rear gallery of the water delivery valve is downward provided with a bottom stepped sudden expansion, the top of the rear gallery of the water delivery valve is upward provided with an oblique line sudden expansion, and the oblique line sudden expansion is connected with the rear gallery by adopting an upward oblique line;a stepped drop sill and a drop sill vent pipe are arranged at the inlet of the bottom stepped sudden expansion; a stepped booster baffle and a booster baffle vent pipe are arranged at the outlet of the bottom stepped sudden expansion; the outlet gallery bottom elevation of the water delivery valve is higher than the inlet gallery bottom elevation; a door header vent pipe is arranged at a door header of the water delivery valve; and the oblique line sudden expansion is provided with a vent pipe. In the invention, active prevention and passive prevention are combined, the problem of cavitation of a high water head ship lock valve can be effectively solved, and the advantages of simplicity in construction, low investment and convenience in maintenance can be realized.

The invention belongs to the technical field of rail transit systems, and particularly relates to an air rail dam crossing transportation system and method. The air rail dam crossing transportation system comprises an aerial rail, transport ships and transfer vehicles. The aerial rail is erected above a river channel in the flowing direction of the river channel, the multiple transport ships are arranged on the river channel, and the transport ships are arranged under the aerial rail. A gate is arranged on the river channel between every two adjacent transport ships, the transfer vehicles moveback and forth on the aerial rail, and the transfer vehicles operably transfer goods on the transport ships. The dam crossing operation mode that the transport ships do not pass through the gate canbe achieved, so that various defects of navigation of a ship lock are avoided, and the channel transport capacity can be greatly improved.

The invention discloses a ship lock floating access door device and an automatic sinking and floating control method. The device is provided with a central water cabin, side water cabins and adjustingwater cabins, all the water cabins are communicated through pipelines below the cabins, the central water cabin is used as a main water supply cabin of other water cabins, the floating and sinking and sinking depth of the device can be controlled by adjusting the water level in the adjusting water cabins through a control device, the posture of the device is sensed through a posture sensing device, and the flow and the speed entering each adjusting water cabin are controlled by adjusting the opening and closing degree of each electric adjusting valve. During drainage, a drainage pump is usedfor draining water to enable the device to float, the whole floating and sinking process and the posture control are automatically completed through the control device, the posture and the floating and sinking speed of the device can be accurately controlled, the situation that the device overturns due to inaccurate manual adjustment is avoided, and the safety and the automation degree are greatlyimproved.

The invention discloses a method for determining safe operation conditions of gate opening of a ship lock in a tidal river reach, and belongs to the technical field of water transportation. The methodcomprises: in a gate opening process, upstream and downstream having water level differences, setting different upstream and downstream water level differences, and establishing a relational expression between the water level differences and the gate front surface flow velocity; establishing a flow calculation formula in the gate chamber when the gate is opened, determining the average flow velocity in front of the gate through the formula, and establishing a relational expression between the water level difference and the gate hoist stress through stress analysis; according to the flow ratelimiting condition in the lock chamber and the maximum rated stress condition of the hoist, comprehensively obtaining a switch-on critical condition meeting the flow rate condition and the hoist stress condition. According to the method, the safe operation condition of opening the gate can be quickly obtained, so that the tide is utilized to open the gate to the greatest extent, and meanwhile, theblindness of experience operation is avoided.

The invention discloses a ship lockage scheduling method and a system, and a storage medium. The method comprises the following steps: acquiring dynamic information and preset requirements of ship lockage and lock chamber lockage; constructing a mathematical model according to the dynamic information and preset requirements; receiving ship lock operation information and ship information within a preset range outside the ship lock; solving the mathematical model according to the ship lock operation information and the ship information, and generating a ship lockage plan; and scheduling ship lockage according to the ship lockage plan. According to the method, a mathematical model is constructed according to dynamic information of ship lockage and lock chamber gate removal and preset requirements; and then solving the mathematical model according to the received ship lock operation information and the ship information within the preset range outside the ship lock so as to dynamically generate a ship lockage plan meeting the actual requirement of ship lock dispatching through the mathematical model, thereby improving the utilization rate of the ship lock and reducing the waiting time of ship lockage. The method can be widely applied to the technical field of water transportation.

The invention discloses a fast calculating method for a water priming and draining process of a multi-stage ship lock. The water priming and draining process is calculated and optimized automatically through a computer, and a water draining process calculating method, a water priming process calculating method and a temporary target calculating method are combined, so that the fast calculation of the water priming and draining process of the ship lock is achieved. The water draining process calculating method is used on the condition that a targeted water level can be achieved only by draining part of water in existing lock chambers; the water priming process calculating method is used on the condition that the targeted water level can be achieved by drawing water from upstream approach channel to the lock chamber; and the temporary target calculating method is fused into the water priming process calculating method and the water draining process calculating method to optimize the water priming and draining process. According to the fast calculating method for the water priming and draining process of the multi-stage ship lock, the water priming and draining reality of the ship lock is considered, and the automatic calculation and optimization of the process is achieved; work tasks of ship lock managers are greatly reduced; and an automation and informatization management process of the ship lock is accelerated.

The invention discloses a ship lock downstream entrance area navigation water flow condition prediction method, and the method comprises the steps: calculating the water flow surface longitudinal and transverse flow velocity extreme values of the downstream entrance area of the ship lock through employing the following formula, and setting the longitudinal and transverse flow velocity extreme values of the entrance area as vymax and vxmax, wherein V represents the flow velocity of an incoming flow section; h represents the incoming flow section water depth; alpha represents an inflow angle, and the angle refers to an included angle between a river drainage center line and an entrance area navigation center line and is called as an inflow angle for short; and BE represents the width of the entrance area. The invention further discloses a ship lock downstream entrance area plane arrangement design and optimization method by applying the method. The navigation water flow condition of the downstream entrance area of the ship lock can be predicted, so that engineering designers can conveniently apply to entrance area design.

The invention provides a multi-step multi-line ship lock combined scheduling method based on flexible job shop scheduling. The method comprises the following steps: step 1, acquiring ship informationand attribute information of a ship lock; 2, setting a target function and constraint conditions; step 3, establishing a flexible job shop scheduling planning model, regarding a vessel as a workpiece,regarding a lock chamber as a machine, regarding a parallel lock chamber as a flexible environment, regarding a ship lockage route as a machining route of a workpiece, regarding the lock chamber capacity as the batch processing capacity of a machine, regarding a ship with the same heading as a workpiece with a compatible relation, wherein multi-step ship lock combined scheduling is similar to flexible operation workshop batch processing scheduling which is partially compatible with a workpiece coupled with two-dimensional encasement; and according to the ship lockage line, deciding a processing scheme, namely a ship lockage scheduling optimization scheme, for ship modeling. The technical problems that existing ship lock potential mining is not enough, and the ship navigation efficiency isnot high are solved.

The invention belongs to the technical field of ship lock chamber construction, particularly relates to an integral combined type large steel mould ship lock chamber wall heat preservation construction method, and provides the following scheme aiming at the problem that heat preservation measures are not arranged in a wall body construction method in the prior art. Comprising the following steps that conditions such as landforms and roads in a construction area are comprehensively known before construction, various obstacles are removed, and a site is preliminarily leveled for construction site arrangement; a water pumping mechanism, an excavator, a bulldozer, a slag car and earthwork test equipment are arranged; measuring and lofting are conducted, the positions of the center line of the foundation pit, upper and lower opening excavation side lines and a soil filling area are determined, and striking marks are made through lime lines and marker posts; when the foundation pit is excavated, the part above the protective layer is shaped by adopting an excavator, the inner wall is compacted, and the part without water is hardened in a fire baking mode, so that tower protection is prevented from being generated when the part below the protective layer continues to be excavated.

The invention relates to an airflow fence structure suitable for a downstream bend of an approach channel and a construction method of the airflow fence structure. The airflow fence structure is formed by connecting a plurality of airflow fence units; one airflow fence unit comprises a bottom pier, a sand separation pier and a drainage fence successively from top to bottom; the bottom pier is a rectangular structure, the sand separation pier is arranged on the bottom pier, the vertical section of the sand separation pier is a right angle trapezoid, the side, close to the approach channel, of the sand separation pier is a right angle, and the side, near a river channel, of the sand separation pier is an oblique plane; and the drainage fence is arranged on the sand separation pier. The airflow fence structure is suitable for terrain where the approach channel of ship lock downstream has a sharp bend and the outer side of the approach channel has shoals, the elevation is significantly higher than the approach channel, and the amount of shoal excavation is too large or excavation is not convenient, and can effectively solve the engineering problems caused by such special terrain. The function of an airflow fence is to avoid hazards of oblique flow and sediment transport, to ensure normal navigation of the approach channel of a ship lock, to ensure normal upstream water level and flow pattern, to reduce the construction difficulty, to lower the construction cost, and the airflow fence structure has good prospects of promotion and application.

The invention provides an inland river ship lock bottom plate top layer reinforcing steel bar supporting device, relates to the technical field of ship lock construction, and solves the problems thatduring supporting, sealing between a supporting pipe and a bottom reinforcing steel bar seat is not tight enough, so that cement grout enters the supporting pipe easily, and finally detection is blocked, self-adaptive adjustment cannot be achieved according to the width of the steel bar frame, and use is inconvenient; and the supporting height cannot be adjusted according to the actual situation.An inland river ship lock bottom plate top layer reinforcing steel bar supporting device comprises a reinforcing steel bar frame. And the steel bar frame is buried in concrete. The two sleeves A are both of a cylindrical tubular structure, and the interiors of the two sleeves A are each connected with a hook in a sliding mode. The two sleeves A are each in threaded connection with a fastening boltA used for locking the corresponding hook, the two hooks are both connected with the reinforcing steel bar frames in a hooked mode, the sleeves A form a self-adaptive adjusting structure of the hooks, and therefore stretching adjustment of the hooks can be achieved according to the width between the reinforcing steel bar frames.