Abstract: The present disclosure provides a risk assessment method of water inrush in tunnels constructed in water-rich grounds. The method includes the following steps: simulating a tunnel excavation process by finite element software MIDAS GTS NX and fluid-structure interaction; according to a research method of control variables, analyzing effects of a groundwater level, an elastic modulus and advanced pipe shed grouting on the stability of surrounding rock, and improving an algorithm of a radial basis function (RBF) neural network using a Grey Relation Analysis (GRA)-based Partitioning Around Medoid (PAM) clustering algorithm to assess risks of water inrush occurring in Qingdao area.

Abstract: The present disclosure provides a multi-factor quantitative analysis method for deformation of a neighborhood tunnel. The method includes the following steps: analyzing monitoring data generated at a tunnel site; simulating collapse occurring at a shallow buried section of a tunnel; determining the degree of influence of each factor on the tunnel and a stratum; and determining quantitative influence of each factor on tunnel deformation. The present disclosure can not only provide an accurate theoretical basis for the construction of the shallow buried section of the small-distance tunnel, but also guarantee safety and cost saving during tunnel construction.

Abstract: A preparation method for a phosphate-based high-temperature-resistant adhesive self-reinforced by in-situ growth and locking of flaky kyanite is provided, including: preparing a modified filler by using bauxite, kaolin, boric acid and boric oxide, and taking a reaction solution of diluted phosphoric acid and aluminum hydroxide powder as latex liquid, and mixing the modified filler, the latex liquid, and silicon powder to prepare the adhesive. After being treated at 700° C., kyanite grows within the adhesive. As the treatment temperature increases, the size and content of the kyanite are further increased, thereby forming a locking and reinforcing structure. After being treated at 1100° C., the bonding strength of the adhesive reaches up to about 50 MPa, and the adhesive illustrates excellent high-temperature-resistant bonding strength.

Abstract: A preparation method for a phosphate-based high-temperature-resistant adhesive self-reinforced by in-situ growth and locking of flaky kyanite is provided, including: preparing a modified filler by using bauxite, kaolin, boric acid and boric oxide, and taking a reaction solution of diluted phosphoric acid and aluminum hydroxide powder as latex liquid, and mixing the modified filler, the latex liquid, and silicon powder to prepare the adhesive. After being treated at 700° C., kyanite grows within the adhesive. As the treatment temperature increases, the size and content of the kyanite are further increased, thereby forming a locking and reinforcing structure. After being treated at 1100° C., the bonding strength of the adhesive reaches up to about 50 MPa, and the adhesive illustrates excellent high-temperature-resistant bonding strength.

Abstract: An intelligent integrated anti-collision system and method for a pier, including: a radar sensing device disposed at the joint between the pier and a girder, image collection devices disposed around the pier, control system, hydraulic system and execution device, where the radar sensing and image collection devices transmit collected signals to the control system, which uses the hydraulic system to control the action of the execution device; the execution device is disposed at a middle part of the pier and includes a plurality of sections of steel-reinforced rubber concrete girder connected end to end through pulleys, the hydraulic system can drive the pulleys to rotate to enable the sections to be located on the same horizontal line, and an energy dissipation apparatus is disposed at the tail end of the last section to realize energy dissipation of the energy generated by impact when an object impacts the energy dissipation apparatus.

Abstract: An intelligent integrated anti-collision system and method for a pier, including: a radar sensing device disposed at the joint between the pier and a girder, image collection devices disposed around the pier, control system, hydraulic system and execution device, where the radar sensing and image collection devices transmit collected signals to the control system, which uses the hydraulic system to control the action of the execution device; the execution device is disposed at a middle part of the pier and includes a plurality of sections of steel-reinforced rubber concrete girder connected end to end through pulleys, the hydraulic system can drive the pulleys to rotate to enable the sections to be located on the same horizontal line, and an energy dissipation apparatus is disposed at the tail end of the last section to realize energy dissipation of the energy generated by impact when an object impacts the energy dissipation apparatus.

Abstract: A magnetic tag sensor includes a cylinder and threaded pipe embedded therein and simulates a magnetic dipole; two threaded pipe wiring interfaces being connected to first and second cables, running through a cylinder upper cross-section outer wall and extending out of the cylinder; the cylinder is sleeved on a guide rail and at a junction between a riverbed and water; an guide rail end inserts into the riverbed, a water sealing box is mounted on a top of the guide rail, a power supply module, a relay and a load arranged inside the water sealing box, the first cable connected to a positive pole of the power supply module, and the second cable connected to a negative pole through the relay and load connected in series; and the threaded pipe in the wall of the cylinder moves up and down with the riverbed to generate a magnetic field signal.

Abstract: Disclosed in the present invention are a low energy consumption anhydrous CO2 phase change absorption agent, and a regeneration method and an application thereof, the absorption agent using a unitary diamine with a primary amine (NH2—) and a tertiary amine (—N—), and not containing any other organic solvent, water, and ionic liquid; two alkyl branches are linked to a nitrogen atom of the tertiary amine, forming a certain hydrophobicity; after absorbing the CO2, the diamine changes from a liquid phase to a solid phase, undergoing liquid-solid phase change to form white amino formate crystals.

Abstract: A magnetic tag sensor includes a cylinder and threaded pipe embedded therein and simulates a magnetic dipole; two threaded pipe wiring interfaces being connected to first and second cables, running through a cylinder upper cross-section outer wall and extending out of the cylinder; the cylinder is sleeved on a guide rail and at a junction between a riverbed and water; an guide rail end inserts into the riverbed, a water sealing box is mounted on a top of the guide rail, a power supply module, a relay and a load arranged inside the water sealing box, the first cable connected to a positive pole of the power supply module, and the second cable connected to a negative pole through the relay and load connected in series; and the threaded pipe in the wall of the cylinder moves up and down with the riverbed to generate a magnetic field signal.

Abstract: An anti-collapse grouting consolidation system including: a grouting pump; an outer flat drill rod; a drill rig that clamps the outer flat drill rod; a sealing device, sheathed on the outer flat drill rod at the orifice of a drill hole, ensuring the outer flat drill rod is sealed with the orifice of the drill hole; and a jet grouting drill bit with bi-directional rib wings. The grouting pump jets slurry into the drill hole in a static osmotic manner through the jet grouting drill bit. A method of using an anti-collapse grouting consolidation system includes, among other things, injecting quick-setting slurry; sealing an orifice hole of the drill hole by an orifice sealing device; and keeping an anti-collapse jet grouting drill bit with bi-directional rib wings repeatedly moving up and down and rotating at a repair segment to repair the repair segment.

Abstract: Disclosed in the present disclosure are a low energy consumption anhydrous CO2 phase change absorption agent, and a regeneration method and an application thereof, the absorption agent using a unitary diamine with a primary amine (NH2—) and a tertiary amine (—N—), and not containing any other organic solvent, water, and ionic liquid; two alkyl branches are linked to a nitrogen atom of the tertiary amine, forming a certain hydrophobicity; after absorbing the CO2, the diamine changes from a liquid phase to a solid phase, undergoing liquid-solid phase change to form white amino formate crystals.

Abstract: A method of manufacturing a heat dissipating device includes steps of providing a heat dissipating fin and a heat pipe. The heat dissipating fin includes a fin body, a through hole and a collar portion, with the through hole formed on the fin body, with the collar portion extending from a periphery of the through hole and having a first U-shaped protruding ear, with the first U-shaped protruding ear having a first opening, with the heat pipe having a heat dissipating end and a heat absorbing end, and with the heat dissipating end opposite to the heat absorbing end; inserting the heat dissipating end into the through hole and the collar portion; and punching the collar portion to shrink the first opening of the first U-shaped protruding ear, such that the collar portion fixes the heat dissipating end in a tight-fitting manner.

Abstract: An anti-collapse jet grouting drill bit with bi-directional rib wings, and a grouting consolidation including: a grouting pump connected to a high-pressure pipeline, which connects to an underground drill rig; an outer flat drill rod, connected with the underground drill rig; a sealing device, sheathed on the outer flat drill rod at the orifice of a drill hole, ensuring the outer flat drill rod is sealed with the orifice of the drill hole which connects to a jet grouting drill bit with bi-directional rib wings. The grouting pump jets slurry into the drill hole in a static osmotic manner through the jet rib wing drill bit, while the underground jet drill rig is rotated by the force of outer flat drill rod. The rotation of the jet slurry and the rib wings, repairs the hole wall by cutting chippings or squeezing the chippings back into the hole wall.

Abstract: A medical adhesive with good biodegradable performance capable of undergoing crosslinking copolymerization, comprising a mono-alpha-cyanoacrylate and a bis-alpha-cyanoacrylic acid diol ester monomer molecule. The olefinic bonds in the mono-alpha-cyanoacrylate structure are polymerized in the presence of infinitesimal anions to form a solid 3D high polymer; the 3D high polymer is provided with degradation sites on the web-like backbone chain, with clear degradation path and absorbable degradation products. The medical adhesive can be used for wound adhesive, large area wound hemostasia, and visceral and soft tissue wound closure.

Abstract: A method of manufacturing a heat dissipating device includes steps of providing a heat dissipating fin and a heat pipe, wherein the heat dissipating fin includes a fin body, a through hole and a collar portion, the through hole is formed on the fin body, the collar portion extends from a periphery of the through hole and has a first U-shaped protruding ear, the first U-shaped protruding ear has a first opening, the heat pipe has a heat dissipating end and a heat absorbing end, and the heat dissipating end is opposite to the heat absorbing end; inserting the heat dissipating end into the through hole and the collar portion; and punching the collar portion to shrink the first opening of the first U-shaped protruding ear, such that the collar portion fixes the heat dissipating end in a tight-fitting manner.

Abstract: A heat dissipating device includes a heat dissipating fin and a heat pipe. The heat dissipating fin includes a fin body, a through hole and a closed ring-shaped portion, wherein the through hole is formed on the fin body, the closed ring-shaped portion extends from a periphery of the through hole and has a first U-shaped protruding ear, and the first U-shaped protruding ear has a first opening. The heat pipe has a heat dissipating end and a heat absorbing end, wherein the heat dissipating end is opposite to the heat absorbing end and is disposed in the through hole and the closed ring-shaped portion. After punching the closed ring-shaped portion, the first opening of the first U-shaped protruding ear shrinks, such that the closed ring-shaped portion fixes the heat dissipating end in a tight-fitting manner.

Abstract: A heat dissipating device includes a base and a heat dissipating fin. The base includes an accommodating recess formed thereon. The heat dissipating fin includes a heat dissipating portion and a protruding portion, wherein the protruding portion protrudes from an end of the heat dissipating portion and is disposed in the accommodating recess. The base and the heat dissipating fin are combined with each other by a punching process, such that a first side wall of the accommodating recess covers at least a part of the protruding portion.

Abstract: A medical adhesive with good biodegradable performance capable of undergoing crosslinking copolymerization, comprising a mono-alpha-cyanoacrylate and a bis-alpha-cyanoacrylic acid diol ester monomer molecule. The olefinic bonds in the mono-alpha-cyanoacrylate structure are polymerized in the presence of infinitesimal anions to form a solid 3D high polymer; the 3D high polymer is provided with degradation sites on the web-like backbone chain, with clear degradation path and absorbable degradation products. The medical adhesive can be used for wound adhesive, large area wound hemostasia, and visceral and soft tissue wound closure.