33results about How to "To achieve water-stop effect" patented technology

A composite soil pressure balance shield machine, comprising : shell (1), cutter head (2), soil storer (3), spiral conveyer (4) and impelling oil cylinder (6),it is characterized in that the said cutter head is set front of the shell, equipped with tearing knife (21) and the cutting knife (22), and the cutter point of the said cutting knife is a little back of the tearing knife; the soil storer is located rear the cutter head, and its wall surface is installed with injecting holes (32), the rear end is installed with pressure balancing equipment (5), and a soil outlet (31)is set under the soil storer; the inlet under the spiral conveyer connects the soil outlet of the container; the said impelling oil cylinder are uniformly installed along the shell inner wall. The shield machine solves the normal tunneling problem on sand or gravel eggs (gravel) layer of high water permeability, or the normal tunneling problem when it need to pass through more than 30 centimeters large stones and other obstructions.

The invention discloses an inner-support-free double-wall locking mouth steel bushing box cofferdam construction method and an inner-support-free double-wall locking mouth steel bushing box cofferdam. Firstly, unit blocks are processed in a factory and then transported to a construction region to be spliced and formed piece by piece, the spliced unit blocks are wholly hoisted to a target pier position at the preset elevation through a large hoisting ship, then construction steps of sludge suction, tenon type locking mouth plugging, sand cushion layer filling, concrete bottom sealing, water suction, foundation clearing, steel protection barrel cutting, pile head removing, whole abutment installation and the like are performed, finally whole dismantling is performed for usage of the next pier position construction. The inner-support-free double-wall locking mouth steel bushing box cofferdam comprises a side plate, a blade foot and a joint and is characterized in that the cofferdam is of a detachable structure, a plane is partitioned into blocks, the blocks are connected in a mode that tenon type locking mouths are combined with bolts, and the inner side is not provided with an inner support. Therefore, the inner-support-free double-wall locking mouth steel bushing box cofferdam has the advantages of being small in construction difficulty, short in construction period, low in cost input, small in material consumption, high in repeated usage times, capable of being wholly recycled, safe, reliable and the like.

The invention discloses an OC-type fore-shaft steel pipe pile structure, a steel pipe pile cofferdam and a self-compaction water stop method. The steel pipe pile structure comprises large-diameter steel pipes, C-shaped small-diameter steel pipes and O-shaped small-diameter steel pipes, wherein each C-shaped small-diameter steel pipe and the corresponding O-shaped small-diameter steel pipe are coaxial with the corresponding large-diameter steel pipe and are arranged on the outer circumference of the large-diameter steel pipe in a spaced mode. Each C-shaped small-diameter steel pipe is providedwith a notch in the axial direction, each O-shaped small-diameter steel pipe is provided with a rabbet, and each O-shaped small-diameter steel pipe is used for being embedded into the corresponding C-shaped small-diameter steel pipe on another adjacent large-diameter steel pipe. The steel pipe pile structure is simple and good in water stop effect.

The invention relates to a connecting part capable of enabling an upper pre-connection pipeline and a lower connection pipeline to communicate in a same layer drainage process, in particular to a drainage casing pipe capable of preventing odor and backflow. The drainage casing pipe capable of preventing odor and backflow comprises a horizontally arranged chassis and a vertically arranged casing pipe, wherein a through hole is formed in the chassis; the bottom end of the casing pipe is fixedly connected with the top surface of the chassis, and the through hole communicates with an inner cavityof the casing pipe; a drainage water stop joint device capable of deodorizing and preventing backflow is arranged on the top end of the casing pipe in a sleeving mode; and an annular drainage filter screen device capable of filtering impurities is arranged on the drainage water stop joint device in a sleeving mode. The drainage water stop joint device removes accumulated water of a floor through agap formed between an inner wall casing pipe and an outer wall casing pipe, liquid sealing is realized through a water stop ring part and a water proof ring part, and meanwhile, backflow caused by different air pressures is prevented. The drainage casing pipe capable of preventing odor and backflow has rich functions, the structure is simple, the installation is convenient, construction steps andmaterials are saved, and the functions of deodorization and backflow prevention while drainage can be realized.

The invention discloses a cast iron sluice gate which comprises a cast iron gate frame, a ventilation pipe, a cast iron gate leaf, a positioning device and water stopping copper frames, wherein a guiding groove is arranged in one side of the cast iron gate frame; the ventilation pipe is fixedly arranged on an air distribution chamber at the upper part of one side, which is opposite to the guiding groove, of the cast iron gate frame; the cast iron gate leaf is arranged in the guiding groove of the cast iron gate frame; the top of the cast iron gate leaf is of a U-shape; the U-shaped top is connected through a hanging shaft; the cast iron door leaf is arranged in the cast iron gate frame in a vertical sliding manner; and a positioning device is arranged outside the guiding groove of the cast iron gate frame. According to the cast iron sluice gate disclosed by the invention, the water stopping copper frames are arranged on the cast iron gate frame and the cast iron gate leaf, so that the defects that a traditional gate is easy to deform and is not tight in water sealing so as to leak water and the like can be effectively solved; and in addition, due to the adoption of the cast iron gate frame and the cast iron gate leaf, the corrosion and wear resistance is greatly improved and the service life of the valve is prolonged. According to the cast iron sluice gate disclosed by the invention, the cast iron gate leaf is arranged in the guiding groove of the cast iron gate frame for connecting in a vertical sliding manner, and thus the convenience and reliability in use are realized; and a slope type positioning device is also arranged on the cast iron gate frame, so that the cast iron gate frame is matched with the cast iron gate leaf to finish the pre-pressing and locking and achieve the effect of stopping water.

The invention relates to a method for preventing drop leakage, and a structure used by the method. The method for preventing drop leakage is as follows: a rod body provided with a plugging body is rotated to make a hole of the plugging body not correspond to a hole of a water-seal body, so as to achieve the functions of controlling water outlet and stopping water; and counterforce of the rod body is utilized to oppress the water-seal body on a water outlet to generate comprehensive absorption stress, so as to achieve the leakproof water-seal effect. The structure for preventing drop leakage comprises a container provided with the water outlet, the water-seal body arranged on the water outlet and provided with the hole, a rod body rotationally arranged below the container, and the plugging body arranged on the rod body corresponding to the water-seal body and provided with the hole.

The invention discloses a sampling and water pumping device with a water stop structure for hydrogeological drilling and a method, relates to the technical field of hydrogeological equipment, and aims to solve the technical problems that the sampling and water pumping device is inconvenient to set the distance from the bottom to an upper water layer to sample different water layers and sample different positions one by one, the operation is troublesome, and the sampling time is long. The lower end of an upper connecting flange is provided with an extraction balance weight component, the lower end of the extraction balance weight component is provided with three water pumping and sampling components, the number of the water pumping and sampling components is three, the lower end of the middle of a connecting conduction piece is provided with a height adjusting assembly in a threaded mode, and the upper end of the height adjusting assembly is in threaded connection with the inner side of an extraction connecting assembly; the water pumping and sampling assembly is arranged at the lower end of the extending and folding assembly, the height can be limited, the water pumping and sampling assembly serves as a balance weight, the water bottom can be sampled, three points underwater can be sampled at the same time, and one-time operation is simple and convenient.

The composite balanced tunnel shield machine includes machine shell, capstan in the front of the machine shell, earth bin on the back of the capstan, screw conveyer for conveying cut earth and driving oil cylinders distributed homogeneously around the machine shell. It features the capstan with both tearing tools and cutting tools; the earth bin with several slurry injecting holes in the back wall; and pneumatic balancer installed in the back part of the earth bin. The screw conveyer is provided with two gates including the first hydraulic gate and the second manual gate; and 26 driving oil cylinders are distributed homogeneously around the machine shell. There are in the shield machine tail three tail sealing steel wire brushes with tail grease in between and the last brush capable of being replaced. Or, the shield machine tail may be water stopping sealed with polyurethane or other material and the last brush may replaced with type-Y sealing rubber brush for stopping water.

The invention discloses an assembly-type tunnel joint form and relates to the technical field of traffic and transportation. A joint steel lantern ring is arranged on the outer wall of a tunnel structure inserting end. A first sealing rubber ring and a second sealing rubber ring are arranged on the outer wall of a tunnel structure bell end. An elastic sealing gasket is arranged on the end face of the tunnel structure inserting end. A steel ring is arranged on the outer wall of an end opening of the tunnel structure bell end. An injection pipe is arranged in the tunnel structure inserting end. A shear resistant plug pin and a plug pin hole are arranged at the tunnel structure inserting end and the tunnel structure bell end. The tunnel structure inserting end and the tunnel structure bell end are connected in an inserting mode through the shear resistant plug pin and the plug pin hole. The assembly-type tunnel joint form is small in joint manufacturing difficulty, convenient to mount, fast, low in cost, good in waterproof effect, safe and reliable. A joint structure has certain rigidity, so that in a complex stratum, the influence of uneven settlement on a tunnel can be resisted.

The invention discloses a tube sheet waterproof sealing gasket which solves the technical problems that mud water cannot be comprehensively prevented from leaking from the contact surfaces of a sealing gasket and a sealing gasket and the contact surfaces of one sealing gasket and a sealing groove and effective squeezing force is difficult to continuously provide. The sealing gasket comprises a sealing gasket body arranged in a tube sheet sealing groove, an upper water-swellable pad is arranged on the upper end face of the sealing gasket body, a lower water-swellable pad is arranged on the lower end face of the sealing gasket body, and the sealing gasket body, the upper water-swellable pad and the lower water-swellable pad form a tertiary water stop structure. Both the upper end face and the lower end face of the sealing gasket body are embedded with the water-swellable pads, and when water leakage occurs at a tube sheet joint at the later stage, the swelling performance of the water-swellable pads is stimulated under the action of water, so that the squeezing force between the sealing gaskets is improved, and second and even third water stopping effects are achieved.