59results about How to "Reduce grouting costs" patented technology

The invention discloses a flat hole grouting subgrade reinforcement method and structure without damaging the road surface. The steps are: A. determining the hole position of the grouting hole; B. drilling a horizontal or oblique grouting hole; The main direction is orthogonal; C, the grouting holes are drilled alternately; D, the inward grouting is drilled from the periphery of the roadbed lesion; E, the grouting flower tube is installed; F, the front end of the grouting holes arranged in a three-dimensional staggered way through the cross section of the roadbed Install the seamless grouting outer pipe; G. Inject cement slurry evenly, and the grouting pressure is determined by the test and the area; H. During the grouting process, observe the settlement, inclination, deformation and displacement of the subgrade pavement, structures and surrounding buildings. The grouting hole is formed by horizontal or oblique dry drilling of the subgrade slope in the diseased area, and the grouting flower pipe and the seamless grouting outer pipe are installed, and the grouting flower pipe and the seamless grouting outer pipe are connected by joints and screws. The method is easy to operate and the operation is simple and convenient. It does not damage the pavement structure, significantly improves the bearing capacity and stability of the subgrade structure in the diseased area, and the reinforcement effect is remarkable.

The invention discloses double-fluid rapid hardening slurry for roadway grouting and mollisol compaction grouting, remedying the defects that a cement-sodium silicate slurry concrement body has poor durability, and the grouting process is complicated. The slurry contains fluids A and B; the fluids A and B are injected at equal volume, and the on-site operation is simple. The fluid A contains 50 percent of portland cement, 0.5-0.75 percent of inorganic sodium salt, 0.025-0.05 percent of organic alcohol early strength agent and the balance of water; and the fluid B contains 43.6-48.8 percent ofcoal ash, 13.9-20.05 percent of sodium silicate and the balance of water. The performances of the slurry are shown as follows: the gelation time is adjustable within the range of 36s-124s, the concrement rate is 100 percent and the early compression strength is high; moreover, the concrement body has good durability and does not crack or pulverize. Compared with the original cement-sodium silicate slurry, the grouting process is simple, the durability of the slurry concrement body is obviously improved, the sodium silicate consumption is saved and the grouting cost is greatly reduced.

The invention relates to a process for constructing a soil anchor, and aims at providing a simple and convenient process for constructing a soil anchor to achieve the aims of improving the grouting diameter, ensuring the reinforcing effect, avoiding grout leakage, reducing grouting amount and reducing cost. The technical scheme provided by the invention comprises the following steps: a, forming and clearing pores; b, placing a pull rod and geotextile, uniformly and alternately distributing a group of centering frames on the pull rod, coating the pull rod and the centering frames into a cylinder by utilizing the geotextile, and sending the whole into the bottom of a borehole; c, carrying out primary grouting in the cavity of the cylinder which is defined by the geotextile; d, carrying out secondary grouting between the geotextile and the borehole wall; and e, carrying out tertiary grouting between the geotextile and the borehole wall. The process is mainly used for various water conservancy and hydropower engineering and municipal engineering.

The invention relates to the technical field related to tunnel driving equipment, in particular to a grouting structure in the tunnel driving process and a grouting method matched with the grouting structure. The grouting structure in the tunnel driving process and the grouting method aim at solving the problem that in the prior art, filling a gap in the back portion of a segment cannot be achieved through synchronous grouting. The grouting structure in the tunnel driving process sequentially comprises a rock stratum and a segment stratum inwards from the inner wall of a tunnel, and accordingly a side-top arch, in unit of blocks, is formed. A support frame is arranged between the segment stratum and the rock stratum, and accordingly a hollow interlayer is formed. A base lining platform is arranged on the bottom of the side-top arch, and reserved grouting holes communicating with the hollow interlayer are formed in the positions, corresponding to the side-top arch blocks, of the top of the segment stratum. The reserved grouting holes are moveably connected with grouting pipes, and the other ends of the grouting pipes are connected with a grouting machine. The grouting structure in the tunnel driving process and the grouting method have the beneficial effects that the grouting cost is not increased, the grouting process is smooth, the utilization rate of the grout is high, the structure of equipment is simple, repairing and later maintenance are convenient, the assembling and disassembling time is short, grouting pressure can be monitored at any time, the grouting quality can be guaranteed, and a framework layer is formed on the contact surface between the grout and water glass so that flowing of the grout to a cutterhead can be reduced.

The invention discloses a layered supporting method based on a deep rectangular coal roadway with a tender composite roof. The layered supporting method is suitable for a coal face of a deep mine, and deformation of the rectangular mining roadway with the tender composite roof is controlled. Firstly, a borehole columnar section is used for judging the geological occurrence of the roadway roof, then a borehole observation instrument is used for detecting fracture development of the roadway roof in the coal mining process, and afterwards the effect of layered supporting is achieved through a short grouting anchor, a long grouting anchor and an anchor cable. By the adoption of the layered supporting method based on the deep rectangular coal roadway with the tender composite roof, according to the detected fracture development of the roof in the coal mining process, grouting supporting is carried out in time, grouting is carried out in time, the grout amount is more sufficient, and grouting cost is lowered.

The invention discloses a method for preparing an anode / electrolyte double-layer structure of a solid oxide fuel cell by single grouting, relating to a preparation method of an anode / electrolyte double-layer structure of a solid oxide fuel cell. The invention solves the problem of complex preparation process of an SOFC (Solid Oxide Fuel Cell), caused by the condition that only the anode, the electrolyte or the cathode of the SOFC can be prepared through single grouting in the conventional grouting process. The method comprises the following steps of: firstly, preparing slurry; and secondly, grouting and curing to obtain a blank, and then sintering the blank to obtain a finished product. The method breaks through the restriction that only a single-layer blank can be obtained through the grouting in the conventional grouting technique, the anode / electrolyte double-layer structure is prepared through the single grouting, the grouting cost is low, the efficiency is high, the energy consumption is low, and the manufacture period of the whole cell is greatly shortened. The monomer solid oxide fuel cell prepared from the anode / electrolyte double-layer structure has the maximum power density up to 0.44W / cm<2> at 800 DEG C.