37results about How to "Reduce the depth of burial" patented technology

The invention relates to a solar photovoltaic thermal / electric heat tracing system for a permafrost-buried pipe. The solar photovoltaic thermal / electric heat tracing system has the characteristics as follows: (1) a heat-storing and heat-tracing resistance wire is electrified and heated by a solar photovoltaic conversion system on a permafrost-buried part of a fluid pipeline on a user side so as to achieve all-weather heat tracing fluid supply; (2) the solar photovoltaic thermal / electric heat tracing system is used for heat tracing protection on a trunk pipeline buried into a permafrost layer so as to prevent the fluid trunk pipeline from freezing (coagulating); (3) a heat-insulating layer made of a phase change heat storage material is wrapped around the permafrost-buried part of the fluid pipeline on the user side, and through electrification-caused thermal storage in the daytime and coagulation-caused heat release at night, heat storage and delayed heat release are achieved; (4) storing remaining electricity of the solar photovoltaic conversion system in a storage battery, and controlling a circuit by a temperature control system according to the real-time temperature around the pipeline so as to achieve intermittent power supply heat tracing, thereby saving energy. The solar photovoltaic thermal / electric heat tracing system has the characteristics of simple and flexible structure, energy conservation, environmental friendliness and the like; without using an additional power supply and power equipment, the investment, maintenance and operating costs can be greatly reduced.

The invention discloses a split-type caisson plus pile composite anchorage foundation and a construction method thereof. A plurality of steel beams, a plurality of steel pipe piles laid on the foundation in the shaft of the front caisson and the rear caisson, and anchor bodies fixed on the front caisson and the rear caisson. Both the front caisson and the rear caisson include outer wall panels, partition walls, shafts, roofs, back-sealing concrete, bottom plates and core filling; both the front caissons and the rear caissons are reinforced concrete caissons with steel shells; Anchor chamber, anchor block, front anchor chamber, scatter saddle, scatter saddle beam, scatter saddle pier. The invention reduces the difficulty of caisson construction and the depth of soil penetration, the two caissons are separated by a certain distance, improves the ability to resist bending moment, improves the bearing efficiency of the caisson, effectively improves the horizontal bearing capacity of the caisson, saves the cost, and solves the problem of The problem of anchorage foundation construction of long-span bridges under soft ground conditions in marine deep water environment.

The invention relates to a mould for forming an axial tensile-strength test piece of cement-based material and a test method, belonging to the field of building materials. The mould comprises a testing machine, a test piece forming mould, a test piece force-transfer device and a data acquisition device, wherein the test piece forming trial mould comprises a bottom plate, two end plates, two lateral plates and two intermediate plates; the two end plates and the two lateral plates are all arranged on the bottom plate, and a cavity is enclosed by the bottom plate, the end plates and the lateral plates; the two intermediate plates are also arranged on the bottom plate in parallel to the lateral plates and positioned in the cavity, and the cavity is divided into three parts by the two intermediate plates, wherein the parts at two sides are used for forming the test piece; bolt rods are embedded in two ends of the test piece, each bolt rod comprises a nail head, a smooth rod and a thread rod, wherein the nail head is embedded into the test piece, the smooth rod passes through the end plates, and thread rod straightly extends out of the end plates; the test piece force-transfer device selectively adopts a universal hinge, and the test piece is connected with the testing machine by the universal hinge; and the data acquisition device is used for acquiring experimental data. The invention can accurately and conveniently measure the axial tensile strength of the cement test piece, and is simple and practical.

The invention provides a drought geological grounding grid comprising vertical grounding electrodes, horizontal grounding bodies, a grounding lead-out wire and a lightning rod. The drought geological grounding grid also comprises multiple grounding trenches. There are multiple vertical grounding electrodes. There are multiple horizontal grounding bodies. One horizontal grounding body is fixedly arranged in one grounding trench. The multiple vertical grounding electrodes and the multiple horizontal grounding bodies are arranged at the periphery of the lightning rod. The two ends of the horizontal grounding bodies are fixedly connected with the upper ends of the vertical grounding electrodes and connected with the grounding lead-out wire at the position of being close to the lightning rod. The grounding lead-out wire is connected with the lightning rod. The two ends of another part of the horizontal grounding bodies are fixedly connected with the upper ends of the vertical grounding electrodes. The vertical grounding electrodes are vertically arranged below the grounding trenches. The upper ends of the vertical grounding electrodes are higher than the bottom of the grounding trenches. The horizontal grounding bodies and the upper ends of the vertical grounding electrodes are wrapped by a resistance reduction agent layer. A mixed water retention agent fine soil layer is laid on the bottom part of the grounding trenches. A common backfill soil layer is arranged on the mixed water retention agent fine soil layer. The drought geological grounding grid is mainly used for the substation grounding grid of drought areas so that the laying depth of the grounding electrodes can be greatly reduced.

The invention provides a prefabricated integrated pipe gallery, comprising a sewage tank (10), an integrated tank (20) and a gas tank (30), the sewage tank (10) is located on the left side of the prefabricated integrated pipe gallery, and the gas tank (30) Located on the right side of the prefabricated integrated pipe gallery, the integrated tank (20) is located between the sewage tank (10) and the gas tank (30), and the lower surface of the inner side of the sewage tank (10) is higher than the lower surface of the inner side of the integrated tank (20). , the upper surface of the inner side of the sewage tank (10) is higher than the upper surface of the inner side of the integrated tank (20). The prefabricated integrated pipe gallery solves the limitation that when the original sewage pipeline is shallowly buried, it is necessary to deepen the buried depth of the sewage pipeline before it can be incorporated into the integrated pipe gallery. It can effectively increase the access range of the sewage pipeline without increasing the burial depth of the sewage pipeline.

The invention relates to a flange extension type column foot for a narrow flange steel column, and a construction technology of the column foot. The column foot is characterized in that the column foot is embedded into a reinforced concrete foundation; the column foot comprises a bottom plate arranged at the bottom end face of the steel column, and flange extension plates arranged on two side walls of two flanges of the steel column respectively; the flange extension plates are welded on the side walls of the flanges by groove complete-penetration welds, and welded with the bottom plate; vertical stiffening ribs are welded between the two opposite flange extension plates; horizontal stiffening ribs are arranged at a top port of a containing cavity; a plurality of studs are uniformly on the bottoms of outer wall surfaces of the two flanges respectively; and anchor bolts are arranged at the two ends of the bottom plate. According to the column foot, with the adoption of the horizontal stiffening ribs and the vertical stiffening ribs, the effective bearing width of an embedded part of the steel column is increased, a bending moment and a shearing force borne by an imbedded column foot node can be transferred conveniently, the embedded depth of the steel column can be reduced significantly, and the embedded depth of the foundation or a bearing platform can be further reduced. The column foot has better economic benefits in engineering practices.