Abstract: A structural flame retardant high strength low exothermic polymer grouting material for consolidating, belonging to a technical field of polyurethane material, is produced by combined the polyether polyol and the modified isocyanate in a weight ratio of 100:(100-160), leading to internal reaction temperature ?100° C., strength ?60 mPa, bonding ?3 mPa, oxygen index ?28% while no halogen and no effect on water quality, odor level (80° C.) ?3.5, and fog test ?5 mg (which means no physical additive flame retardant is diffused into the environment). In particular, with no halogen, which is known as environmental hormones, in the plasticizers, there will be less combustion smoke, wherein the present invention will not release corrosive or irritating hydrogen halide gas, nor produce toxic carcinogens polybrominated benzoxins and polybrominated dibenzofurans, thereby avoiding the long-term impact of the material on the environment.

Abstract: A method for detecting road diseases by intelligent cruise via an unmanned aerial vehicle (UAV), the UAV and a detecting system therefor are provided. The method for detecting road diseases by intelligent cruise via UAV, wherein a road disease detection model and a road recognition model based on deep learning network are built in the UAV, wherein the method specifically comprises a step of: automatically flying the UAV on a predetermined route on the actual road determined by the road recognition model, and obtaining road disease test results by the road surface disease detection model. The present invention adopts the road recognition model and road disease detection model based on deep learning network, which can realize automatic cruise and automatic road disease detection, only need to set a predetermined route or area range, which is convenient and fast.

Abstract: The present invention relates to a polymer expanding material in infiltration or seepage multi-water environment and a preparation method thereof, belonging to a technical field of polymer expanding foam materials. The polymer expanding material includes the following parts of materials by weight: 20-30 parts of rosin polyester polyol, 20-50 parts of isocyanate, 20-40 parts of PhireGuard® MB-512, 5-10 parts of HFO-1233zd, 1-2 parts of surfactant, 0.01-1 part of catalyst, and 0.01 parts of benzoyl chloride. The present invention has high sand fixing body strength, fast curing speed, good elastoplasticity, good pouring property and permeability, and good expanding property, which is suitable for infiltration or seepage multi-water environment, especially for dam infiltration, piping, and other problems during construction and subsequent operation of water conservancy projects.

Abstract: A method for stabilizing and lifting a channel board by underwater grouting includes (A) when the channel board is damaged, removing the damaged channel board, cleaning and leveling a gravel layer under the damaged channel board, placing an undamaged channel board installed with first grouting pipes and a second grouting pipe on the gravel layer, wherein multiple geotextile bags are respectively bound to the first grouting pipes; when the channel board is subsided, installing first grouting pipes and a second grouting pipe into first grouting holes and a second grouting hole, respectively; (B) performing a first polymer grouting through the first grouting pipes, and performing a second polymer grouting through the second grouting pipe; (C) cutting off a part of the first grouting pipes the second grouting pipe which are exposed to the channel board, and leveling incisions; and (D) removing excess polymer left on the channel board.

Abstract: A in-service repair method combing externally bonded pre-stressed FRP and polymer grouting for PCCP with broken wire, includes excavating PCCP, supporting the PCCP, treating outer wall of PCCP, bonded an external of the PCCP with pre-stressed FRP for repairing, laying grouting pipe, backfilling and grouting for densing. First of all, excavating a PCCP pipeline to be repaired and supporting the PCCP pipeline with a supporting device, smoothing the outer wall of the PCCP pipeline at a broken wire position and applying primer, and winding the FRP around a damaged portion of the PCCP pipeline, pre-stressing the FRP by applying a pre-stressing device and applying dipping glue to the FRP after tension to stick the FRP on the pipe wall, then laying a grouting pipe, backfilling the pipeline repaired, and finally injecting polymer into the soil after backfilling and compacting the soil by the grouting pipe pre-buried.

Abstract: A pressing-pulling device includes: a pressing-pulling bracket, wherein slotting oil cylinders are symmetrically and vertically mounted on the pressing-pulling bracket, and a piston rod of each of the slotting oil cylinders faces downwardly; a bottom end of the piston rod is connected to a connecting plate, and a through-hole is provided in a middle of the connecting plate; a continuous lifting mechanism is installed in a middle of the pressing-pulling bracket, and a slotting rod is vertically inserted into the continuous lifting mechanism; a lifting ring is installed at a top end of the slotting rod; a bottom end of the slotting rod extends downwardly through the through-hole to connect to a slotting cutter; a locking device is fixed on the connecting plate near the through-hole for fixing the slotting rod.

Abstract: A trenchless rehabilitation device for disconnects on large-diameter concrete drainage pipe and method thereof is provided; which includes: a pipe CCTV, a water blocking device, a lining repairing permanent structure, and a grouting device. The pipe CCTV is configured to determine the location of the pipe disconnection; the water blocking device is configured to form the working space; then the rubber seal lining short tube and multiple expanded round fixed steel plates are configured to form the inner repair permanent structure, and the grouting equipment is configured to insert the expanded round fixed steel plates. The grouting holes are configured to polymer grouting on the periphery of the pipe disconnection and the soil void. The trenchless repair process provided by the present invention can form a composite pipeline disjointed repair structure of inner repair permanent structure and polymer grouting material.

Abstract: The application provides a system comprising a water blocking device, a support structure, an injection machine, a resin impregnated lining hose and a light curing machine. The water blocking device blocks water and creates space for repairing. The support structure jacks up the deformation of pipelines. The injection machine injects polymer into the gap between the support structure and the HDPE pipes and the defective soil. A resin impregnated lining hose is inflated to attach to the support structure before being cured by UV lights. A CIPP (Cured-in-place pipe) liner is formed. The application carries out the trenchless rehabilitation of deformation of HDPE pipelines by integrating the method of the lining steel ring supporting, polymer injection and CIPP process. The defective soils are stabilized and further defects after repairing is avoided. The application is advantageous to the trenchless rehabilitation for double wall corrugated pipeline (diameter over 800 mm).

Abstract: A polymer composite grouting method for blocking leaking and sand inrush of underground pipeline includes steps of: (1) determining a leaking and sand inrush position of an underground pipeline; (2) drilling a plurality of grouting holes in a ground surface; (3) placing two grouting pipes into each of the grouting holes, binding a film bag at a bottom of one of the grouting pipes; (4) injecting a polymer grouting material via one of the grouting pipes to form a polymer sand stabilizing body; (5) extruding water to accumulated in the pipeline; (6) installing a plurality of geotextile bags at the pipeline section displacement; (7) injecting the polymer material into the geotextile bags for blocking the leakage; and (8) filling the pumping area out of the pipeline. The present invention provides a practical technical measure to treat the leaking and sand inrush of the underground pipeline under complicated geological condition.

Abstract: A polymer bag grouting method for repairing a settlement of an underground pipeline includes steps of: (1) detecting a settled pipeline section and determining a grouting plan; (2) drilling holes for containing bags; (3) placing the bags into the holes; (4) injecting a polymer material into the bags; (5) uplifting the settled pipeline section; and, (6) filling a cavity and reinforcing a soft soil layer. The polymer material is a non-water reacted two-component polymer material. The method provided by the present invention has advantages of rapidness, small cut, light mass, high tenacity, economy and durability. The method is advanced, highly-efficient, economical and practical and able to rapidly repair the settlement of the pipeline section through uplifting. The method of the present invention is successfully applied to multiple projects of uplifting the underground pipelines, showing great economic and social benefits and a wide development and application prospect.

Abstract: A polymer grouting method for constructing an ultra-thin anti-seepage wall meeting requirements of anti-seepage designs of dams, includes the following steps of: forming continuous slots on a body of the dam and the foundation which need seepage-proofing and reinforcing; and injecting two-component expansive polymer grouting materials to the slots through grouting pipes, a volume rapidly expands after the polymer grouting materials reacts and the slots are filled to form a polymer ultra-thin body, the polymer ultra-thin bodies which are adjacent are cemented together to form a continuous, uniform, and regular cementing ultra-thin polymer anti-seepage wall; this invention is different from the conventional anti-seepage wall technology whatever through the material, the mechanism or the construction methods, which has the advantages such as speediness, ultra-thinness, minimally invasive, lightness, high toughness, economy, and durability, applied in reinforcement projects of a number of the dams and dikes.

Abstract: A polymer grouting method for uplifting a ballastless track of a high-speed rail includes following steps of: (1) drilling grouting holes; (2) manufacturing geo-textile bags and binding the grouting pipes up with the geo-textile bags; (3) tying up the geo-textile bags; (4) displacing the geo-textile bags; (5) grouting two-component expansive polymer materials into the geo-textile bags; (6) uplifting the track; (7) grouting two-component expansive polymer materials for filling; and (8) monitoring amount of the uplifting, wherein a vertically uplifting height is monitored in real time by a laser level, and the grouting is quit if the vertically uplifting height meets uplifting requirements.

Abstract: A grouting method for anchoring with polymer is provided, wherein the method includes steps of: a) rod body processing; b) tying up a geotextile bag and grouting tubes on the anchoring rod body; c) hole drilling; d) polymer grouting: I. hole sealing grouting; II. anchoring grouting. The present invention has advantages of a sufficient adaptability, non-water reaction, convenient and fast construction, being economic, a high strength and a high durability. An expansive polymer material has an obvious compacting effect on soil, and is capable of increasing a friction force between a grout and a base; the water-proofing polymer material is an impermeable material for a steel rod body, and is of benefit to anti-corrosion and durability of the rod body; a solidifying time of the polymer material is short and no maintenance is needed in such a manner that construction periods are shortened.

Abstract: A polymer grouting method for constructing a vertical supporting system, includes following steps of: (1) structuring an integrated polymer water-blocking panel; (2) constructing a polymer coping of a polymer vertical supporting system; (3) constructing polymer anchors on the integrated polymer water-blocking panel; (4) processing constructing connection of the polymer anchors; and (5) excavating vertically by layer in turn, wherein step (3) and step (4) is repeated until a construction of the polymer vertical supporting system reaches a projected depth, and then the construction of the polymer vertical supporting system is completed. The polymer vertical supporting system constructed according to the present invention has advantages, such as convenience, lightness, high tenacity, economy, and lasting long. The slots of foundation pits, side slopes, municipal pipelines, etc. can be excavated vertically fast by adopting the present invention.