45results about How to "Avoid risk of collapse" patented technology

The invention discloses a polymer grout injected earth-rock dam and a construction method thereof. The polymer grout injected earth-rock dam comprises rockfill, polymer grout injected rockfill and a face slab. A dam body is built with the rockfill, with the rockfill and a clay core wall or with the face slab and the rockfill by filling. Overall dam grouting or grouting on the upstream surface and the downstream surface of the dam body are performed during filling. The problems that conventional earth-rock dam allows no passage of water, accelerations at the top of the dam are high, the rockfill mass is easy to loosen and the like are solved, and the polymer grout injected earth-rock dam is simple in structure and convenient in construction, has evidently improved seismic stability, has wide application prospect and is an economical and practical dam.

The invention discloses an irrigation and draining brake which comprises a flashboard frame and a flashboard, wherein a water inlet through hole is formed in the flashboard frame. Guide grooves are formed in both sides of the flashboard frame. Both sides of the flashboard are contained in the guide grooves and can move along the guide grooves, positioning adjusting teeth are arranged on the inner wall of the guide grooves, and elastic clamping tongues which are matched with the positioning adjusting teeth are arranged on both sides of the flashboard. The irrigation and draining brake is fixed on an opening of a ridge, irrigation and draining work is controlled by moving the flashboard, and water level height can be adjusted. The irrigation and draining brake has the advantages of being convenient to use, safe and reliable.

The invention discloses a pressure balance method of combining mud with an external airbag of an earth pressure shield. A mud pressure chamber with one airbag or a combination of multiple airbags is used to connect the top of the shield earth chamber through a pipeline. During the excavation process of the shield machine, the pipeline keeps Unimpeded, using the high compressibility or elasticity of the airbag, using mud as the transmission medium, and keeping in touch with the earth pressure in the soil silo to form a stable balance mode. This mode can eliminate ultra-high pressure (such ultra-high pressure will cause ground uplift, slag outlet or shield tail gushing, and shield tail seal breakdown) or ultra-low pressure (such ultra-low pressure will cause stratum collapse and ground collapse) in the soil bin. The condition of the soil bunker is stabilized within a reasonable range, and the micro-disturbance excavation of the stratum around the tunnel is realized.

The invention discloses a cabinet adjusting leg, and belongs to the field of furniture. The cabinet adjusting leg comprises an upper part and a lower part; the upper part comprises a base, and the base is fixed with a cabinet body bottom plate; the base comprises a fixing plate and a fixing part, the fixing plate comprises a first center shaft, and the fixing part and the first center shaft are not overlapped; the fixing plate comprises at least one opening part, the fixing plate comprises a first edge and a second edge, the opening part is located on the side, facing the first edge, of the first center shaft, and the fixing part is located on the side, facing the second edge, of the first center shaft; the base further comprises at least one positioning clamp, the first end of the positioning clamp is fixedly connected with the fixing plate, and the second end of the positioning clamp protrudes in the direction away from the first face; the upper part comprises a supporting rod, and the supporting rod comprises a threaded hole and an internal thread located in the threaded hole; and the lower part comprises a screw which is in threaded connection with the supporting rod. Dual positioning between the cabinet body bottom plate and the adjusting leg base is achieved through the fixing part and the positioning clamp, position deflection between the adjusting leg base and the cabinet body bottom plate is avoided, and the installation difficulty is reduced.

A closed airfoil structure partition press molding method, suitable for composite material structure molding method and mold with large elongation scale, double curvature shape and upper, lower, left and right closed sections of aircraft airfoil Scheme, the airfoil structure scheme consists of upper and lower skin honeycomb sandwich panel structures and multiple longitudinal beam structures arranged in the middle. The forming method includes the use of upper and lower shape control molds and vacuum bags for the panel in the interlayer area between the internal beams. And the combination of threaded pipe torque adjustable auxiliary struts and baffles is used to realize the pressure control of all surfaces of the composite material. The present invention can realize the integrated high-precision molding of the structure through co-curing by adopting the method of unequal pressurization in different regions under the condition of different curing pressures required for pressing different parts such as honeycomb sandwich and laminated board.