40results about How to "Guarantee stress stability" patented technology

The invention discloses a raft foundation building uplift and reinforcement structure and method in a corrosive geological environment. The uplift and reinforcement structure includes an existing building lower column, a raft foundation connected to the bottom of the column, and a composite foundation connected below the raft foundation The reinforced layer, the composite pile foundation connected under the reinforced layer of the composite foundation, and the water-stop curtain connected to the periphery of the raft foundation. During construction, by setting up the water-stop curtain, it is beneficial to block the water in the aquifer and prevent the outflow of slurry and in-situ water and soil. The inverted L-shaped design of the water-stop curtain can further avoid the further corrosion of the raft foundation and ensure the lateral Displacement limitation; through the setting of composite foundation strengthening layer and composite pile foundation, it is beneficial to locally lift the raft foundation and overall reinforcement, and improve the overall bearing capacity in combination with water-stop curtains; through the setting of groundwater monitoring holes, it is convenient for on-site monitoring during construction The level of groundwater level is conducive to maintaining the stability of water and soil pressure in the underground environment.

The invention discloses a high-segmentation upward deep hole ore extraction zero-dead-zone following filling mining method. Firstly, a drilling chamber is constructed at the top end of a stage stope room, an operating space is formed through supporting, a mine collecting structure is established at the bottom end, upward chambering is carried out, a compensation space is formed, and the mining and cutting work is finished; secondly, a vertical deep hole is drilled in the drilling chamber, and the configuration of a boundary presplitting smooth blasting bomb hole is matched; thirdly, the upward segmentation blasting is carried out, ore reserving and ore removing are carried out, the zero dead zone in the ore removing process is ensured, and meanwhile the compensation space is guaranteed; fourthly, after appropriate ore drawing in the final blasting, an interlayer is arranged on the top of an ore heap, and the interlayer is covered with dead rock to fill the top dead zone along with the ore drawing; fifthly, after ore drawing is finished, stope room dead rock cemented filling is achieved through the potting material at the top end. The mining method is suitable for the environment where mine fragmentation is not stable, the large dead zone is not allowed, but high-segmentation, large-scale and large-yield thick and large ore body mining is urgent. The mining method has the advantages that the structure is simple, and high efficiency and economic efficiency are achieved.

The invention provides a cylindrical shaft sleeve fixture. The cylindrical shaft sleeve fixture comprises a clamping rod main body and a sleeve main body; the clamping rod main body is provided with akey groove, an upper clamping plate, an upper shaft column, a lower shaft column and a thread for fixing sleeve workpieces; the outer surfaces of the workpieces are clamped by the sleeve main body; the sleeve main body comprises a sleeve, and a base plate arranged at the lower end of the sleeve; and the base plate is provided with a thread hole matched with the thread of the clamping rod main body. In the cylindrical shaft sleeve fixture, the clamping rod main body and the sleeve form a fixture main body; and the cylindrical shaft sleeve fixture can meet clamping of a straight cylinder and astep cylinder, and is simple in structure, low in production cost and simple and convenient to use.

The invention provides a waterproof cushioning system device of a prefabricated rectangular comprehensive pipe rack connector and a mounting method of the waterproof cushioning system device, and belongs to the technical field of underground structure comprehensive pipe racks. The waterproof cushioning system device of the prefabricated rectangular comprehensive pipe rack connector comprises a segment jack part and a segment socket part which are connected correspondingly; the segment jack part comprises a first vertical part, a first oblique part and a second vertical part, and the segment socket part comprises a third vertical part, a second oblique part and a fourth vertical part; the first oblique part is provided with one or more wedge grooves, U-like rubber blocks are arranged in thewedge grooves, and the surfaces of the U-like rubber blocks are glued with water-swelling rubber layers; and the segment jack part and the segment socket part are connected through a plurality of damping bolts, and a waterproof storage system is arranged in a seam between the first vertical part and the third vertical part. According to the waterproof cushioning system device of the prefabricatedrectangular comprehensive pipe rack connector and the mounting method of the waterproof cushioning system device, a water flow can be effectively prevented from entering a comprehensive pipe rack bin, the service life period of the waterproof cushioning system device is prolonged, safety performance of the waterproof cushioning system device is improved, and the stable operating capacity of the connector is improved.

The invention provides a flat mop, which comprises a mop plate (1), wherein a connecting piece (2) connected with a mop rod is movably connected to the mop plate (1), the mop plate (1) comprises a base (11) and a pull plate (12) detachably connected with the base (11), the length of the base (11) is smaller than that of the mop plate (1), and the base (11) is connected with the connecting piece (2). Compared with the prior art, the flat mop of the invention has the characteristics of moderate packaging length, better use stability and more convenience in use.

The invention provides a rotating joint connecting device for a prefabricated component inclined strut and an application method. The rotating joint connecting device aims at solving the problems that when an inclined strut used for adjusting the perpendicularity is mounted through a PC component, the inclined strut is subjected to eccentric compression due to off position of pre-buried parts, and thereby mounting quality of the whole prefabricated component is influenced. The connecting device comprises an embedded plate, a 360-degree rotatable joint and a limiting component, the embedded plate is fixedly connected with the PC prefabricated component through embedding parts, the 360-degree rotatable joint is perpendicular to a prefabricated wall component or a prefabricated floorslab component and fixedly connected to the embedded plate, and the limiting component penetrates through the end of the inclined strut and is fixedly connected with the free end of the 360-degree rotatable joint. By means of the connecting device, hinge of joint positions can be achieved, and the situation that additional stress is generated to slabs and support bars is avoided. The application method comprises the following steps: 1, fixedly connecting the two ends of the inclined strut with the prefabricated wall component and the prefabricated floorslab component respectively; 2, rotating the inclined strut, so that the end of the inclined strut is perpendicular to the embedding parts.