Abrégé

Disclosed are an undersea polymer cement-based mortar and a preparation method therefor, belonging to the technical field of seabed leveling and repairing in ocean engineering. The polymer cement-based mortar is prepared from cement, fine sand, a flocculating agent, a setting accelerator and a powdery water reducing agent. The flocculating agent is synthesized from a polypropylene monomer and other components, and the setting accelerator is a setting accelerator synthesized from water-based epoxy resin and other components. By means of provision of the flocculating agent and the setting accelerator, the polymer cement-based mortar and the preparation method therefor improve the fluidity and various mechanical properties of the polymer cement-based mortar in a marine environment, and also reduce the underwater dispersion characteristic of the polymer cement-based mortar, thereby achieving good seabed surface leveling and repairing effects.

Classes IPC  ?

• C04B 28/00 - Compositions pour mortiers, béton ou pierre artificielle, contenant des liants inorganiques ou contenant le produit de réaction d'un liant inorganique et d'un liant organique, p.ex. contenant des ciments de polycarboxylates
• C04B 24/26 - Composés macromoléculaires obtenus par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone
• C04B 24/28 - Composés macromoléculaires obtenus autrement que par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone
• C04B 111/74 - Applications sous-marines
• C04B 111/24 - Résistance à l'eau de mer

Abrégé

Disclosed in the present invention is a fin-type emergency flood control screen. The emergency flood control screen comprises a water facing portion, a water bearing portion connected to the water facing portion and extending by a predetermined distance along one side of the water facing portion, and a fin-type anti-seepage member at least sealedly connected to an extension end of the water bearing portion and extending outwards by a predetermined distance during working; and the fin-type anti-seepage member has flexibility required for engineering. According to the present embodiments, the sealing anti-seepage effect of the flood control screen, in particular the anti-seepage effect under the uneven ground working condition, can be improved, and the use is convenient.

Classes IPC  ?

• E02B 3/10 - Barrages; Digues; Canaux à vannes ou autres ouvrages pour digues, barrages ou analogues

Abrégé

The present invention relates to the field of wind–wave-flow numerical simulation research. Disclosed are a wind stress coefficient expression method and system comprehensively considering influences of the wind speed, the fetch, and the water depth. Two dimensionless numbers, i.e., the fetch Froude number and the fetch Reynolds number, capable of representing the wind-wave-flow action intensity are constructed on the basis of a wind-wave-flow coupling action mechanism of water areas such as a lake and an ocean; a wind stress coefficient expression form comprising an undetermined coefficient is established; and then by combining experimental and actually measured data, the undetermined coefficient is obtained by using a nonlinear regression method to obtain the final wind stress coefficient expression. The present invention overcomes the disadvantage that the conventional wind stress coefficient expression only considers the influence of the single factor of the wind speed, and breaks the limitation that it is difficult for the conventional wind stress coefficient expression to adapt to the lake numerical simulation. A Lake Taihu water level verification result shows that the constructed wind stress coefficient expression has good rationality and great superiority. The present invention can be widely popularized in the field of wind–wave-flow numerical simulation research of water areas such as a lake and an ocean.

Classes IPC  ?

• G06F 30/20 - Optimisation, vérification ou simulation de l’objet conçu
• G06T 17/00 - Modélisation tridimensionnelle [3D] pour infographie
• G06F 119/14 - Analyse des forces ou optimisation des forces, p.ex. forces statiques ou dynamiques

Abrégé

The present invention relates to a well lid structure, an inverted-step-type shaft structure, and a blowout reduction and avoidance method. A shaft is arranged at the top of an underground pipeline, and makes the underground pipeline be in communication with the ground, and a well lid is arranged at the top of the shaft. One side of the shaft is of a step shape and is mirrored along the axis of a hole opening, the step width thereof is greater than the width of the underground pipeline, and the shaft can be integrally formed and can also be assembled. A first step from among shaft steps is flush with the ground, and a cylinder is dug out in the center of the first step and serves as a shaft mouth; the last step is linked with the top of the underground pipeline, and the slope of a middle step is 30° to 60°; and backfill materials above the steps are flush with the ground. According to the present invention, a driving pressure difference value which forms the blowout is damped, the well lid is provided with vent holes via which the underground pipeline is in communication with the ground atmosphere, non-constant air pressures in the shaft and the underground pipeline are balanced, the air pressure in the pipeline is balanced in advance, and a driving pressure difference extreme value which forms the blowout phenomenon is damped, thereby effectively preventing the formation of blowout occurrence conditions.

Classes IPC  ?

• E02D 29/12 - Trous d'homme; Autres chambres d'inspection ou d'accès; Accessoires à cet effet
• E03F 5/02 - Regards ou autres chambres de visite; Ouvertures à neige; Accessoires

Abrégé

Provided is an underwater repair system for a cavity region of a concrete panel rock-fill dam panel, including a moving platform, a work cabin, a pressure drainage apparatus, a traction apparatus, and a positioning apparatus; the traction apparatus controlling the movement of the moving platform on the surface of a dam concrete panel; the positioning apparatus transmits a detection position; the work cabin is a pressure cabin, the work cabin being connected to the pressure drainage apparatus, and a drill apparatus and grouting apparatus being arranged in the work cabin; the moving platform moves into the cavity region, and the pressure drainage apparatus starts up to drain the water in the work cabin, a partially closed waterless space being formed inside the work cabin, the drill apparatus drilling the concrete panel at the upper end of the cavity region and the grouting apparatus subsequently implementing grouting to complete the repair.

Classes IPC  ?

• E02B 7/00 - Barrages ou déversoirs; Tracé, construction, procédés ou dispositifs pour leur réalisation
• E02B 3/10 - Barrages; Digues; Canaux à vannes ou autres ouvrages pour digues, barrages ou analogues
• E02B 7/06 - Barrages en terre; Barrages en enrochement
• E02B 3/16 - Etanchement ou joints
• E02D 15/06 - Mise en place de béton sous l'eau
• E02D 37/00 - Réparation des fondations endommagées

Abrégé

A distributed optical fiber-based system and method for real-time monitoring and evaluation of a service status of a soft mattress. During a service period of a soft mattress, distributed optical fiber sensors (6) collect in real time physical signals reflecting the deformation and ambient temperature of the soft mattress, and transmit the physical signals to an optical fiber interrogator (3). The optical fiber interrogator (3) receives and processes the collected physical signals, converts the physical signals into electric signals and sends the electric signals. A wireless transmission module (2) transmits the electric signals to a terminal computer (1). The terminal computer (1) receives and processes the electric signals to obtain deformation information of the soft mattress. The terminal computer (1) evaluates the service status of the soft mattress on the basis of the deformation information of the soft mattress, thereby giving maintenance suggestions. The system can overcome the technical shortcomings of current real-time monitoring and evaluation for a service status of a soft mattress, facilitate mastering the operating status of the soft mattress by a manager in real time, promotes the construction of intelligent inland waterways, and can provide a reference for the development of intelligent perception and multi-source information fusion for the service status of an inland waterway regulating structure.

Classes IPC  ?

• G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p.ex. indicateur optique de déformation

Abrégé

A flow rate sensing-based underwater dam leakage detection system, comprising a moving platform, a pressure sensing device (2), a traction device and a positioning device (5); the pressure sensing device (2) and the positioning device (5) are disposed on the moving platform, and the traction device controls the moving platform to move on a surface of a concrete panel of a dam; the pressure sensing device (2) senses changes in pressure caused by water flow, and transmits the location of a leakage point by means of the positioning device (5). The detection system enables the rapid, efficient and low-cost detection of underwater leakage from concrete panels and rock-fill dam panels.

Classes IPC  ?

• G01M 3/26 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide par mesure du taux de perte ou de gain d'un fluide, p.ex. avec des dispositifs réagissant à la pression, avec des indicateurs de débit
• G01P 13/00 - Indication ou enregistrement de l'existence ou de l'absence d'un mouvement; Indication ou enregistrement de la direction d'un mouvement
• G01P 5/14 - Mesure de la vitesse des fluides, p.ex. d'un courant atmosphérique; Mesure de la vitesse de corps, p.ex. navires, aéronefs, par rapport à des fluides en mesurant les différences de pression dans le fluide
• G01F 1/34 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en mesurant la pression ou la différence de pression

Abrégé

An underwater detection system for a cavity region of a concrete panel rock-fill dam based on acoustic wave sensing, comprising a moving platform, an acoustic wave producing apparatus, an acoustic wave receiving apparatus (9), a traction apparatus, and a positioning apparatus (4); the acoustic wave producing apparatus and the positioning apparatus (4) are arranged on the moving platform, the traction apparatus controlling the movement of the moving platform on the surface of a concrete panel (13); the acoustic wave producing apparatus produces a penetrative acoustic wave, and the acoustic wave receiving apparatus (9) receives the acoustic wave and determines whether there is a cavity region on the basis of the acoustic wave signal, the position of the cavity region being transmitted by means of the positioning apparatus (4).

Classes IPC  ?

• G01N 29/06 - Visualisation de l'intérieur, p.ex. microscopie acoustique
• E02B 7/06 - Barrages en terre; Barrages en enrochement

Abrégé

An underwater repair system for a cavity region (21) of a concrete panel rock-fill dam panel, comprising a moving platform, a work cabin (1), a pressure drainage apparatus (6), a traction apparatus, and a positioning apparatus (3); the work cabin (1) and the positioning apparatus (3) are arranged on the moving platform, the traction apparatus controlling the movement of the moving platform on the surface of a dam concrete panel (19); the positioning apparatus (3) transmits a detection position; the work cabin (1) is a pressure cabin having an upper closure structure, the work cabin (1) being connected to the pressure drainage apparatus (6), and a drill apparatus (11) and a grouting apparatus (12) being arranged in the work cabin (1); the moving platform moves into the cavity region (21), and the pressure drainage apparatus (6) starts up to drain the water in the work cabin (1), a partially closed waterless space being formed inside the work cabin (1), the drill apparatus (11) drilling the concrete panel (19) at the upper end of the cavity region (21) and the grouting apparatus (12) subsequently implementing grouting to complete the repair. Underwater repair of the cavity region (21) of a concrete panel rock-fill dam panel is implemented by means of the partially closed waterless space inside the work cabin (1) combined with the drilling apparatus (11) and the grouting apparatus (12).

Classes IPC  ?

• E02D 15/06 - Mise en place de béton sous l'eau
• E02B 7/06 - Barrages en terre; Barrages en enrochement
• E02D 37/00 - Réparation des fondations endommagées

Abrégé

Disclosed are an experimental device and an experimental method for studying a quantitative relationship between parent fish spawning and flow rate stimulation. The experimental device is specifically an annular water tank that is formed by successively connecting, end-to-end, a first arc-shaped water tank, a first irregularly-shaped water tank, a second arc-shaped water tank, and a second irregularly-shaped water tank, and the length of the outer circumference of the experimental device is 70 m to 110 m; both the first irregularly-shaped water tank and the second irregularly-shaped water tank have a plane inner wall and have a distance between the outer wall and the inner wall gradually increasing from two ends to the middle, and both the first irregularly-shaped water tank and the second irregularly-shaped water tank are internally equipped with a water flow pushing device which enables the maximum flow rate in the experimental device to reach a preset value. The experimental method of the present invention sets, according to the experimental device, different flow rates to stimulate parent fish to spawn, and obtains a quantitative relationship between a flow rate and parent fish spawning. The experimental device of the present invention has a complex flow field, and has successively implemented for the first time a model experiment for parent fish spawning behavior.

Classes IPC  ?

• A01K 61/10 - NÉCESSITÉS COURANTES DE LA VIE ÉLEVAGE; CHASSE; PIÉGEAGE; PÊCHE ÉLEVAGE; AVICULTURE; APICULTURE; PISCICULTURE; PÊCHE; OBTENTION D'ANIMAUX, NON PRÉVUE AILLEURS; NOUVELLES RACES D'ANIMAUX Élevage des animaux aquatiques des poissons
• A01K 63/00 - Récipients pour poissons vivants, p.ex. aquariums; Terrariums
• E02B 1/02 - Modèles hydrauliques

Abrégé

Provided is a hydraulic lifting machine for ships with an anti-overturning capability, comprising an active anti-overturning mechanical synchronization system (2), a stabilization and equilibration hydraulic driving system (3) and a self-feedback stabilization system (4), wherein the stabilization and equilibration hydraulic driving system (3) comprises a first resistance equilibration member (36), a second resistance equilibration member (37), a circumferential forced ventilation mechanism (34), and a pressure-stabilization and vibration-absorption box (35); the self-feedback stabilization system (4) is fixed on a ship reception chamber (11) via a supporting mechanism; and the supporting mechanism comprises a base (41) connected to the ship reception chamber (11), a bracket (44) hinged to the base (41), a flexible member (43) fixed between the bracket (44) and the base (41), a limiting stopper (42) arranged on the outer side of the flexible member (43), and a guide wheel (45) arranged on the bracket (44). Further provided is a design method for the anti-overturning capability of the hydraulic lifting machine for ships.

Classes IPC  ?

• E02C 5/00 - Mécanismes élévatoires verticaux pour bateaux