7results about How to "Construction stability" patented technology

The invention relates to the technical field of soft soil treatment, and discloses a curing agent for coastal soft soil and a manufacturing process of the curing agent. The process comprises the following steps: carrying out coarse and fine grading pretreatment on the furnace bottom slag, carrying out acid activation treatment on the zeolite powder, carrying out surface modification treatment on the basalt fiber, preparing a component A delayed coagulation curing agent, preparing a component B coagulation accelerating curing agent, and compounding the two components in proportion for use. The curing speed can be adjusted within 15-90 minutes by compounding the component A and the component B according to different mass proportions, and a double-phase structure of a rigid framework and a gelling matrix is formed by the surface modified basalt fibers and graded furnace bottom slag coarse particles. The rheological property of slurry is adjusted through selective ion adsorption of acid activated zeolite powder and molecular chain extension of hydroxypropyl methyl cellulose, and the technical problems that a coastal soft soil curing agent is large in brittleness, poor in construction adaptability, non-adjustable in curing speed and low in synergistic utilization rate of various solid wastes are solved.

The application discloses a main bridge steel structure construction method and relates to the technical field of bridge construction. The specific steps comprise the following steps: dividing regions, installing baffle plates and pier columns, installing steel pipe piles and platform support columns, installing inter-column supports and sliding beams to form sliding tracks, repeatedly constructing the south bank, completing platform support covering a river, installing lower chord rods and lower bridge decks, installing upper chord rods and upper bridge decks, installing upper-layer cantilevers and lower-layer cantilevers, assembling sliding units, repeatedly assembling sliding units until closure, hoisting the last sliding unit and completing installation of the main bridge steel structure. The construction method can reduce operation risks, shorten construction period, save materials and reduce costs.

The invention relates to the technical field of tunnel construction, in particular to a landslide accumulation body geology shallow-buried unsymmetrical-pressure tunnel roof collapse disposal method which comprises the following steps that 1, a roof collapse mountain is surveyed on site; 2, reinforcement construction is conducted on the excavated mountain body; 3, lofting is conducted on the outer side of the tunnel primary support, hole forming is conducted in the tunnel trend according to the pile diameter and the pile length of the pipe pile, and the pipe pile is placed in a hole and grouted; 4, top beam construction is conducted on the top ends of the pipe piles on the two sides of the tunnel primary support so that the pipe piles on the two sides can be integrated; and 5, a top plate is arranged on the outer side of the outer contour line of the top of the tunnel primary support, the two ends of the top plate are connected with the crown beams correspondingly, an arch frame is arranged at the bottom of the top plate, and after arrangement is completed, reinforcing treatment is conducted on the roof fall portion in the tunnel hole. According to the disposal method provided by the invention, a large amount of earthwork backfilling and grouting can be reduced, the work amount is obviously reduced, the construction period is effectively shortened, and meanwhile, the construction cost is also reduced.

This utility model belongs to the field of bridge construction technology, specifically a bridge wet joint template lifting device, including a fixed frame; a lifting component is provided on the top of the fixed frame; a drive wheel is rotatably connected to both ends of one side of the bottom of the fixed frame; a connecting rotating column is fixedly connected to one side wall of the drive wheel; a spur gear is fixedly connected to the outer side wall of the connecting rotating column; and spring columns are provided at both ends of one side of the bottom of the fixed frame. During operation, the spur gear can cooperate with the transmission belt to drive the spur gear to rotate. The rotating spur gear can cause the rack and the closing retaining ring to move downward, so that the closing retaining ring and the spur gear mesh with each other, thereby achieving the fixation of the connecting rotating column and the drive wheel. The overall device makes the drive wheel more stable during construction and reduces the occurrence of drive wheel wobbling, which could affect the installation accuracy.

The utility model discloses a kind of construction device for improving the construction efficiency of V-bridge triangle area, comprising: pier seat, bottom connection cushion cap or pier column, form Y-type pier structure;Oblique leg, contain part pier top box girder consolidation section, adopt low-position cast-in-place or prefabricated assembly, and connect with pier seat by vertical hinge;Triangular area top box girder section, through support assembly construction, connect with oblique leg through embedded steel bar, support assembly includes first support and second support;Oblique leg post-cast segment, for closing vertical hinge area, make oblique leg and pier seat form integral force structure;Box girder closure section, connect through rigid frame, complete triangular area integration;Vertical rotation system, for vertical rotation construction of oblique leg;Limiting block, welded on steel bar, prevent vertical rotation overreach.The utility model uses low-lying cast-in-place method to construct oblique leg containing part pier top box girder consolidation section, then V-structure triangular area construction method of vertical rotation and triangular area top box girder section closure, reduce the risk of high-position operation and support overturning.