258results about How to "Reduce construction steps" patented technology

Provided is a propelling method for a combined portion between a shield tunnel segment and a mine tunnel segment in a subway tunnel. The propelling method includes the first step that a steel sleeve is horizontally struck into the surrounding rock in front of a tunnel face of the mine tunnel segment after construction of the mine tunnel segment is finished, and then a shotcrete support is applied on the tunnel face; the second step that glass fiber ribs of separation end walls are bound tightly close to the shotcrete support, the glass fiber ribs and steel bars for ring beams behind the glass fiber ribs are connected in a bound mode, next the steel bars for the ring beams are connected with reserved steel bar heads of a primary support of the mine tunnel segment in a welded mode, and then the separation end walls and the ring beams are poured; the third step that an arc-shaped concrete guiding platform is poured at the bottom of the mine tunnel segment; the fourth step that when a shield tunneling machine approaches to the mine tunnel segment, the propelling speed is lowered, the shield tunneling machine is accommodated in the steel sleeve, and then the shield tunneling machine is used for directly cutting and removing the surrounding rock in the steel sleeve, the shotcrete support of the tunnel face and the separation end walls and carrying out grouting and slag removing until the shield tunneling machine passes through the ring beams and is accommodated on the arc-shaped concrete guiding platform. According to the propelling method, construction risks are low, construction is easy, efficiency is high and the cost is low.

The invention provides a construction method for shield tunnel boulder exploration and blasting treatment. The method comprises the following steps: the boulder detailed exploration is performed around a geologic drilling hole for exposing a boulder; after boulder burying information is proved, the geologic drilling hole for the boulder detailed exploration is used as a boulder blasting gun hole and a pressure release hole; stemming is used for filling in the gun hole; liquid-state explosive is precisely put in the gun hole; a blasting protector is distributed on the gun hole; safety alert is arranged around the blasting area; after the blasting is finished, the safety alert is relieved; and the grouting sealing is performed for the gun hole and the pressure release hole. The construction method reduces construction steps, shortens the construction period, largely reduces the boulder treatment cost, and improves the blasting control precision.

The invention provides a construction method for newly-built large deep foundation pit basements under a protection building. According to the construction method, on the premise that the protection building is not disassembled, within a limited foundation range, a mature building translation technology and a reverse foundation pit construction method are combined, and overall construction of the first-region and second-region basements is directly performed after the protection building and a top plate of the first-region basement are connected in an anti-seismic butt joint mode. On the basis of guaranteeing structural stability of the protection building, construction working conditions and construction steps of the basements are reduced, the construction period is shortened, safety and stability of the protection building are improved, overall construction quality and efficiency are improved, ambient environment is effectively controlled, the number of dividing strips between first and second regions is reduced, and time benefits, space benefits and stable benefits are maximized.

Disclosed are a construction method of the dissymmetric double-linking-arch tunnel structure. The structure comprises a small cave and a big cave, wherein the big cave is connected with the small cave. The construction method of the dissymmetric double-linking-arch tunnel structure successively includes the following steps: constructing a small cave advance support, constructing a small cave preliminary support, conducting construction of a preliminary support piece being embedded on the small cave preliminary support, constructing a small cave secondary lining, constructing a big cave advance support, constructing a big cave preliminary support, constructing big cave temporary middle partitioning walls, conducting integral connection of preliminary support connecting pieces on the big cave preliminary supporting and the small cave preliminary supporting, dismantling the big cave temporary middle partitioning walls at interval, and constructing a big cave secondary lining. The dissymmetric double-linking-arch tunnel structure and the method resolve the technical problems that in a traditional dissymmetric double-linking-arch tunnel construction process, abandoned work amount is large, cost is high, construction process is slow, and construction safety cannot be guaranteed.

The invention discloses a movable upward raise boring machine. The movable upward raise boring machine comprises a machine supporting mechanism, a main thrust oil cylinder, a power head, a crawler type traveling portion and a drilling rig, wherein the machine supporting mechanism comprises a lower support, a base, a guiding column, a top beam and an upper support; the upper end of the lower support is fixedly connected with the bottom surface of the base; the top surface of the base is fixedly connected with the lower end of the guiding column; the upper end of the guiding column is fixedly connected with the bottom surface of the top beam; the top surface of the top beam is fixedly connected with the lower end of the upper support; the top surface of the base is hinged to the main thrust oil cylinder; a retractable portion of the main thrust oil cylinder is fixedly connected with the power head; and the power head is slidably connected with the guiding column and is in transmission connection with the drilling rig. Well drilling construction can be performed from bottom to top, requirements of well drilling construction in the existing underground tunnel on a rock formation or a formation positioned below the underground tunnel are met, and requirements of well drilling construction on a rock formation or a formation above the underground tunnel can also be met.

The invention discloses anti-seismic stairs with a sliding support and a construction method thereof. The anti-seismic stairs with the sliding support are characterized in that the anti-seismic stairs with the sliding support comprise an upper platform (1), a stair bench slab (2) and a lower platform (3) which are connected in sequence, the lower platform (3) is connected with the lower end of the stair bench slab (2) through the sliding support, and the sliding support comprises a first sliding pad layer (10) and a second sliding pad layer (11). The anti-seismic stairs with the sliding support is provided with the sliding support, and has the advantages of being high in seismic resistance capacity, extremely low in friction coefficient, free of maintenance, strong in adaptability, resistant to friction and long in service life, high in bearing capacity, simple in structure and convenient in construction. The construction method has the advantages that construction procedures are few, operation is easy and convenient, and the anti-seismic capacity of stairs and a main body structure can be improved greatly.

The invention discloses putty leveling integrated gypsum mortar. The mortar is formed by mixing and stirring, by weight, 60-70 parts of desulfurized gypsum, 10-15 parts of 250-mesh heavy calcium carbonate, 6-10 parts of quartz sand of 20-30 meshes, 10-15 parts of 40-mesh quartz sand, 2-5 parts of glass bead heat preservation lightweight aggregate, 1-2 parts of redispersible emulsion powder VAE, 0.2-0.5 part of hydroxyethyl methylcellulose ether and 0.03-0.05 part of modified protein retarder. By means of the putty leveling integrated gypsum mortar, the traditional indoor leveling construction is greatly simplified, multiple construction procedures such as existing adhesion agents, leveling mortar and putty are replaced, forming can be completed at a time, the maintenance period is short, the construction period is greatly shortened, and the construction efficiency is improved.

The present invention discloses a kind of tunnel support structure, and aims at providing tunnel support structure with raised integral bearing capacity, simple construction and excellent maintainability. The tunnel support structure includes a sprayed concrete layer combined to tunnel wall rock as the initial support; and a secondary laid and molded concrete layer combined with the inner wall of the sprayed concrete layer as the initial support. The present invention has the advantages of raised integral bearing capacity, simple construction, low cost, excellent maintainability, simple operation and capacity of ensuring the integral durability of the tunnel structure.

The invention discloses a profile steel and reinforced concrete slab assembled light composite beam bridge and a construction method thereof. The composite beam bridge is mainly composed of precast reinforced concrete slabs, profile steel beams, precast pier columns and a pavement structure layer, wherein the profile steel beams are connected through high-strength bolts and are combined with welded seams to be reinforced; reserved ribs are preset in the precast reinforced concrete slabs, the precast reinforced concrete slabs are welded and connected by adopting straight thread sleeves and the reserved ribs, and the precast reinforced concrete slabs are connected with the profile steel beams through pegs, the reserved ribs and micro-expansion concrete; the profile steel beams are fixedly connected with the precast pier columns. The composite beam bridge disclosed by the invention is convenient in construction, short in construction period, high in structure safety coefficient; and according to the invention, the construction problem of a high-altitude composite beam bridge is solved effectively.

The invention discloses a building structure system based on a prefabricated thermal insulating wall. The building structure system comprises a foundation and floor wallboard units, all floor wallboard units are connected sequentially, the floor wallboard unit on the lowest layer is connected with the foundation through a foundation connecting longitudinal rib, the floor wallboard units comprise aplurality of prefabricated wallboards and composite floor slabs, the adjacent wallboards are connected through I-shaped joints, L-shaped joints and T-shaped joints, the prefabricated wallboards are divided into outer walls and inner walls, the outer walls are prefabricated sandwich thermal insulating walls, the inner walls are prefabricated double-surface composite walls, and all the floor wallsand the composite floor slabs are connected through upper-lower composite floor slab joints. According to the building structure system based on the prefabricated thermal insulating wall, the problemsof steel cage binding and hoisting of all components are simplified, and the construction efficiency is high; meanwhile, connection of all the prefabricated components is simple, construction is convenient, and practicability adjustment can be conducted according to the force bearing condition of the building system; and whole pouring is conducted after connection of all the components, the structure stability of the whole building is improved, consumables are saved, and building waste is reduced.

The invention relates to a trenchless directional drilling construction method for a pipeline burying channel. The trenchless directional drilling construction method comprises the following steps that 1, pipe distribution is conducted, specifically, hot melting connection is conducted on the end faces of two PE solid-wall pipes; 2, directional drilling is conducted, specifically, a working pit and a receiving pit are manufactured, and a directional drilling machine is adopted for hole drilling; 3, back chambering construction is conducted, specifically, chambering is conducted in a step-by-step chambering mode to form a pipeline; 4, the pipe is pulled back, specifically, the pipe is pulled by adopting a pipe puller; and 5, inspection wells are manufactured, specifically, foundation pits are excavated in the two sides of an effective pipe section, the prefabricated inspection wells are installed, the prefabricated inspection wells are in waterproof connection with the PE solid-wall pipes, and then the foundation pits and the peripheries of the prefabricated inspection wells are backfilled. Only the working pit and the receiving pit need to be excavated in the ground, drilling, chambering and pipe pulling operations are carried out at the positions of the working pit and the receiving pit, and environmental influences such as multiple construction technology procedures, a largeamount of road surface damage and traffic obstruction caused by pipeline open excavation construction can be avoided.

The invention discloses a construction method for bailing out a stuck single-shield tunnel boring machine. The construction method is invented mainly for solving the problems that an existing TBM escape method is complex and involves a large workload. The method comprises the following steps that a hollow anchor pipe is arranged behind a shield for grouting, and surrounding rock of an operation area is solidified; expanding excavation and arch replacement supporting are conducted on a pipe roof drilling machine working area; an advanced pipe shed is constructed in a collapse influence area infront of a tunnel face; pilot tunnels are excavated in the two sides of a shield; accumulated slag in a collapse area in front of a cutterhead is manually cleaned in the cutterhead and through pilot tunnels in the two sides; and collapsed slag in front of the cutter head is cleaned until the cutter head can rotate normally, and the tunnel boring machine is saved. The method has the advantages thatthe operation of bailing out the tunnel boring machine is safe, the stuck tunnel boring machine can be released in an extremely short time, and the cost and the time are saved.

The invention discloses a steel pipe piece device for freezing soil around the tail of a shield tunneling machine. The steel pipe piece device comprises a plurality of arc-shaped steel pipe pieces, freezing pipelines and rib plates, wherein the arc-shaped steel pipe pieces are sequentially connected to form annular steel pipe pieces; a plurality of rows of freezing pipelines are arranged on the inner surface of each arc-shaped steel pipe piece along an arc line, the freezing pipelines on the same row of the adjacent arc-shaped steel pipe pieces are connected through first pipes to form a plurality of annular freezing pipelines, and secondary refrigerants in the annular freezing pipelines enable the temperature of the annular steel pipe pieces to be reduced, so that the soil around the annular steel pipe pieces is frozen; and the rib plates are arranged on the inner surfaces of the arc-shaped steel pipe pieces, rib plate cavities are formed, the rib plate cavities are filled with greasewith low freezing point, and an annular thin plate is arranged at the end of each rib plate and used for blocking the corresponding rib plate cavity so as to prevent the grease from falling off. Thedevice can efficiently freeze the soil around the tail of the shield tunneling machine, so that a circle of uniform freezing curtain is formed at the tail of the shield tunneling machine, and water and soil outside a shield tail gap are blocked. The invention further discloses a construction method for replacing a tail brush of the shield tunneling machine.

The invention discloses a novel concrete hinged mattress. The novel concrete hinged mattress comprises multiple concrete bricks which are evenly distributed, adjacent concrete bricks are connected through an adjustable hinge joint mechanism, each concrete brick comprises a square concrete base plate, hollow cavities are formed in the concrete base plates, the outer portions of the hollow cavitiesare provided with reinforcing steel bar skeleton frames embedded in the concrete base plates, dual-way slope protection mechanisms are arranged on the tops of the concrete base plates, inner sunken bottom grooves are formed in the bottoms of the concrete base plates, and high-adaptation self-adjusting base mechanisms are arranged on the inner sunken bottom grooves. According to the difference of the terrain, the length of a hinge between adjacent concrete bricks is changed, device generality is higher, meanwhile, the riverway slope surface does not need to be leveled, the concrete hinged mattress is placed, construction efficiency is higher, in addition, the concrete hinged mattress can protect the slope face from two aspects, and the device slope protection effect is better.

The invention provides a convenient wall panel dry hanging installation structure. The convenient wall panel dry hanging installation structure includes a first transverse keel, a second transverse keel, an adjustable dry hanging piece and a wall panel, wherein the first transverse keel is connected to a wall, the first transverse keel is provided with a W-shaped bending surface, the two oppositesides of the W-shaped bending surface are correspondingly connected with the edges of second connecting surfaces through a step, the edges of the W-shaped bending surface form chamfered surfaces extending outwards at the step, and clamping grooves are formed between the end parts of the chamfered surfaces and the step; the second transverse keel is bent into a W shape, the center part of the second transverse keel is connected to the center part of the first transverse keel through screws in a screw joint mode, and two right angle bending hooks are correspondingly arranged on the two oppositesides of the second transverse keel and are clamped into the clamping grooves; the adjustable dry hanging piece includes a dry hanging piece body and an elastic plate, the side of the dry hanging piece body is in an L shape, and the elastic plate is fixedly connected to the bottom end of the dry hanging piece body; and the wall panel is fixedly connected to the dry hanging piece body. The invention further provides an installation method. According to the convenient wall panel dry hanging installation structure and method, the construction cost can be reduced, manual positioning is not required, the construction is more convenient, and the loosening phenomenon is reduced.

The invention provides a horizontal well supercritical CO2 fracture development enhanced geothermal method and system. The method comprises the steps that after liquid CO2 and a grinding material aresufficiently mixed, the obtained mixture is placed down to the position to be perforated, the mixed solution of the grinding material and the supercritical CO2 forms high-pressure jet after passing through a hydraulic injection nozzle, and a sleeve, a cement sheath and a hot dry rock are broken to form a perforated hole; the pure-liquid CO2 is pumped to the position to be perforated to form a manual crack; a propping agent and the supercritical CO2 are sufficiently stirred inside a sand mixing vehicle, the mixed fracture liquid is pumped into a well through a fracturing truck, the propping agent is carried into the crack through the supercritical CO2 to complete first-section fracturing; the hydraulic injection nozzle is moved to the next position to be modified, a spacer fluid is pumped in to protect a fractured well section, the operations are sequentially executed repeatedly till the horizontal well is completely fractured and modified; after modification, the supercritical CO2 continues to be adopted as a circulating working medium to perform hot dry rock heat exchange production to achieve repeated heating and power generation.

The invention belongs to a heat insulation structure prefabricated integrated assembly wall panel and an overall building forming method. A panel body is made by injecting a heat insulation slurry formed by stirring cement, polystyrene particles, additives and water into a mold, and demolding after drying, and slab joint connecting grooves are respectively formed in the peripheries of two side planes of the panel body; ring beam connecting grooves are formed in the upper end surface of the panel body, and longitudinal through holes in parallel with the slab joint connecting grooves are longitudinally formed in the panel body at intervals; transverse through holes are transversely formed in the panel body at intervals, and are communicated with the horizontal through holes, and a reserved window frame opening and a reserved door frame opening which are sunken into the panel body are respectively formed in one side of a plurality of panel bodies. Prefabricated pieces are quickly assembled into a house by the heat insulation structure prefabricated integrated assembly wall panel provided by the invention. The heat insulation structure prefabricated integrated assembly wall panel has the advantages of fewer components, unified production standards, short construction period, light weight, raw material saving, high strength, low cost, convenience in transport and use, good heat insulation and noise isolation, impact resistance, effective shock resistance and convenience in installation.