37results about How to "Reduce excavation" patented technology

According to the post-grouting expanded-base composite tubular pile and the construction method, an expanded-base technology and a post-grouting technology are combined, pile end post-grouting can efficiently fill pores of an expanded-base part, the strength and compactness of a pile end soil body are remarkably enhanced, the bearing performance of a pile foundation is improved, meanwhile, the settlement amount of the pile foundation is effectively reduced, and the construction efficiency is improved. The stability and the safety of the building in the long-term use process are ensured; a technical solution; comprising a grouting pipe, a prefabricated tubular pile and a composite pile outer wrapping body. The grouting pipes are symmetrically arranged in the prefabricated tubular pile in the axial direction, the outer sides of the grouting pipes are wrapped with water stop adhesive tape, and the length of the grouting pipes is larger than that of the prefabricated tubular pile. A composite pile wrapping body is arranged on the outer side of the prefabricated tubular pile, the prefabricated tubular pile is in a cylindrical shape, the upper portion of the composite pile wrapping body is also in a cylindrical shape, and the lower portion of the composite pile wrapping body is in a circular truncated cone shape.

The present invention discloses an annular cutter disc including a cutter holder body and a cutter disc assembly arranged on the cutter holder body; the cutter disc assembly includes an inner cutter disc, an outer cutter disc, a first telescopic member and a second telescopic member; the present invention adopts the form of an inner cutter disc and an outer cutter disc, and the cutter disc can be changed in diameter through the telescopic action of the second telescopic member to achieve graded excavation, and the excavated annular groove can provide space for the pipe segment to enter the rock. The present invention also discloses a tunneling system, and the present invention drives the annular cutter disc to construct underground through a driving body, thereby improving construction efficiency and safety. The present invention also discloses a tunneling method, and the tunneling method of the present invention can be applied to the working conditions when soft soil or soft rock is converted to hard rock formations. The present invention adopts the form of graded excavation, and the outer cutter disc expands the annular groove to the outer diameter of the pipe segment, which is convenient for the pipe segment to sink into the rock to ensure the orderly progress of the construction; concrete and pipe segments are used for sealing and water stopping, creating favorable conditions for subsequent excavation.

The invention discloses an abrupt slope mountain photovoltaic micro pile foundation construction method under complex geological conditions, and relates to the technical field of photovoltaic foundation construction. According to the method, in order to solve the problems that the slope of the abrupt-slope mountain land is large, the terrain is complex, large machines are difficult to operate, and the ecological environment is sensitive, the structural form of small-diameter pile groups and chamfered triangular bearing platforms is adopted, the heavy-load unmanned aerial vehicle hoisting technology is combined, and minimally invasive, efficient and green construction is achieved. The core of the method comprises the steps of construction preparation, measurement positioning, hole forming, reinforcement cage and bearing platform reinforcement installation, material transportation based on the heavy-load unmanned aerial vehicle, concrete pouring, maintenance and the like. The method is high in environmental adaptability, capable of overcoming 15-45-degree abrupt slopes and complex geological conditions and greatly reducing earth excavation and vegetation damage, high in structural bearing capacity and low in manufacturing cost, solves the problems that a traditional construction method is low in efficiency, serious in ecological damage and the like, and is suitable for mountain photovoltaic power station projects, particularly suitable for photovoltaic foundation construction of ecological sensitive areas.

The utility model relates to a tunnel structure combining diversion, water delivery, emptying and ecological discharge. The method is suitable for the technical field of water conservancy and hydropower engineering. According to the technical scheme, the tunnel structure combining flow guiding, water conveying, emptying and ecological discharging is characterized by comprising a flow guiding tunnel, the first end of the flow guiding tunnel is located on the upstream of a dam, and the second end of the flow guiding tunnel is located on the downstream of the dam; the water intake tower is arranged at the first end of the diversion tunnel, at least two water intake ports located at different heights are formed in the water intake tower, and the water intake ports are provided with water intake gates; the concrete plug is arranged in the diversion tunnel and can be used for plugging the diversion tunnel, and a pressure steel pipe communicated with the upstream and the downstream of the plug is arranged in the plug; at least part of the water conveying steel pipe is located in the diversion tunnel on the downstream side of the concrete plug, and a water inlet of the water conveying steel pipe communicates with the pressure steel pipe in the concrete plug; the blow-down pipe is connected to the water conveying steel pipe and is provided with a control valve; and the ecological drainage pipe is connected to the blow-down pipe and is provided with a control valve.

The utility model belongs to the technical field of liquor making, and particularly relates to a Maotai-flavor liquor workshop which comprises a main workshop and an auxiliary workshop, and the main workshop is lengthwise and comprises longitudinal wall bodies located on the two transverse sides and transverse wall bodies located on the two longitudinal sides; the auxiliary house is arranged on the outer side of one transverse wall body of the main power house, and a personnel and logistics channel is arranged on the outer side of the other transverse wall body of the main power house. According to the embodiment, the auxiliary houses, the personnel and the logistics channels are arranged on the two longitudinal sides of the main plant building, the arrangement mode of the auxiliary houses, the personnel and the logistics channels is beneficial to digesting the height difference in the site, only the pedestrian passageways and the drainage ditches need to be built on the transverse outer side of the main plant building, the excavation and backfill amount is relatively small, the excavation amount and the backfill amount can be effectively reduced, and the construction cost is reduced. And low-disturbance development is implemented, so that the damage to the mountain is reduced, and the natural ecological environment is protected.

This utility model relates to the technical field of welding construction platforms, specifically to a construction platform for welding the outer side of steel pipes on steep slopes. It includes an operating platform, a support mechanism, and connecting components. The top surface of the operating platform is constructed as an operating surface. The support mechanism includes at least two lattice columns, and the connecting components include several anchor rods. The anchor rods can provide a limiting connection to the bottom end of the lattice columns. The operating platform provides an operating surface for welding the outer circumferential seam of the pipe. Workers can stand on the operating surface at the top of the platform to perform welding operations at corresponding positions. Simultaneously, the support mechanism provides stable support for the operating platform. The support mechanism can be anchored to the slope surface by multiple anchor rods. The anchor rods can be fixed by drilling and implanting, utilizing the anchoring force of the deep soil and rock mass of the slope to fix the lattice columns. This helps reduce the amount of slope excavation and minimizes the impact of the construction platform erection on construction costs and schedule.

The invention relates to the technical field of tunnel engineering, and provides a construction method of a bealock section large-span multi-arch tunnel entry structure, which comprises the following steps: constructing a first pre-reinforcing pile assembly and a second pre-reinforcing pile assembly, excavating a temporary side slope to construct a middle pilot tunnel, excavating the middle pilot tunnel, and constructing a middle partition wall in the middle pilot tunnel after the middle pilot tunnel is communicated. And backfilling soil and stones to the bottom height of the protective arch, constructing the protective arch located above the left tunnel hole and the right tunnel hole, constructing an open cut tunnel section and an end wall type tunnel portal, backfilling soil at the top of the protective arch to the designed height, and then synchronously constructing the left tunnel hole and the right tunnel hole to the hidden tunnel section. According to the method, synchronous construction of the left main hole and the right main hole of the multi-arch tunnel can be achieved, the construction procedures of the multi-arch tunnel are greatly reduced, safety is high, meanwhile, the side slope is effectively reinforced, the side slope is prevented from collapsing in the excavation process, the design method of the protection arch is further provided, the determined protection arch can meet the structural requirement, and construction convenience can be improved.

The application relates to a narrow-base tower deflection pile cap foundation. The application is suitable for the technical field of narrow-base tower foundation of power transmission lines. The application aims to provide a narrow-base tower deflection pile cap foundation. The technical scheme adopted by the application is as follows: a narrow-base tower deflection pile cap foundation comprises a cap buried below the ground, a connecting column structure vertically arranged on the top of the cap and used for connecting the tower leg of the narrow-base tower, and a group of inclined piles vertically arranged on the bottom of the cap, wherein the group of inclined piles is arranged correspondingly to the tower leg of the narrow-base tower and is eccentrically arranged, so that the bending moment caused by the partial horizontal load of the upper part can be offset.

This invention relates to the field of engineering construction technology, specifically a construction method for a tunnel on a high slope. The method includes: S01, excavating the top of the tunnel and providing slope support; S02, excavating the right side of the tunnel and providing temporary support; S03, excavating the left side of the tunnel and providing initial support, pre-anchor support, and temporary steel frame support; S04, pouring the left tunnel structure and bottom slab; S05, constructing temporary steel frame support and dismantling the existing temporary steel frame support; S06, constructing the right tunnel structure; S07, constructing ancillary structures such as drainage ditches, cable trenches, and road surfaces within the tunnel; S08, backfilling and counter-pressure at the top of the tunnel, constructing a top seepage-proof layer, drainage ditches, and landscaping. This invention reduces excavation volume, minimizes damage to the natural environment of the mountain, avoids slope deformation and instability caused by prolonged exposure, and ensures the safe and smooth progress of the project. It also avoids structural damage to the tunnel due to water accumulation and insufficient backfill compaction.

The present application relates to the technical field of tunnel engineering, in particular to a kind of soft weak surrounding rock shallow-buried unsymmetrical pressure tunnel portal section excavation method, comprising the following steps: S10, slope excavation tunnel excavation contour line above the natural slope of arch top and support;S20, vertical steel pipe pile is built outside tunnel excavation contour line on the side of mountain;S30, set range in tunnel arch portion is built reinforced concrete arch cap;S40, the slope toe of the reinforced concrete arch cap on the side of mountain that has been excavated and supported is backfilled;S50, build tunnel outside retaining wall;S60, the upper part of the reinforced concrete arch cap is backfilled and counter-pressured;S70, tunnel subsurface excavation and support are carried out.The present application can reduce the disturbance of lower construction to slope, avoid the construction risk of dangerous deep foundation pit engineering, improve construction reliability, speed up construction progress and protect ecological environment.

This utility model discloses a support structure for horizontal pipe bends in confined spaces, relating to the field of pipe laying and support technology. It includes multiple support units arranged at arc intervals along the thrust direction of the bend. Each support unit comprises a steel column vertically anchored to the foundation surface, a pressure plate fixedly connected to the upper part of the steel column, and an arc-shaped support plate fixedly disposed above the pressure plate to support the bend. The support surface of the arc-shaped support plate is adapted to the outer wall contour of the bend, forming a good contact surface. This utility model, through modular and prefabricated design, achieves miniaturization, lightweighting, and rapid construction of the support structure, making it particularly suitable for pipeline projects in densely built-up areas and other confined workspaces, exhibiting significant practicality and economic benefits.

The utility model discloses a water delivery arrangement system, particularly discloses a water delivery arrangement system for relieving low-temperature water drainage, and belongs to the technical field of design and construction of water conservancy and hydropower engineering structures. According to the water delivery arrangement system for relieving low-temperature water drainage, the excavation work amount is remarkably reduced, and it can be effectively ensured that water with the relatively high temperature and the relatively sufficient flow can be taken at any time. The water conveying arrangement system comprises a water storage reservoir which is arranged on a main stream river channel through a river blocking dam, and is characterized by further comprising a branch ditch river channel, a water conveying pipeline and a water inlet tower arranged at the input end of the water conveying pipeline, the branch ditch river channel is communicated with the water storage reservoir, and the water inlet tower is arranged on the branch ditch river channel; the river bottom elevation of the branch ditch river channel is higher than the riverbed elevation at the corresponding position of the main stream river channel and lower than the dead water level elevation of the reservoir; in the water taking process, the water inlet tower obtains stored water in the reservoir area of the water storage reservoir layer by layer from top to bottom through the branch ditch river channel.

The application provides a setting method of an effective depth of a shock isolation trench. The setting method of the shock isolation trench is as follows: determining a shock influence range according to a connecting line of a region boundary line adjacent to a side of an existing building of a vibration source range and an angle point of an outer contour of the existing building, then determining a length of the shock isolation trench according to the shock influence range, then controlling the vibration source to move on the region boundary line adjacent to the side of the existing building of the vibration source range, and then determining an effective shock isolation effective depth of the shock isolation trench by monitoring a measured horizontal acceleration and a measured vertical acceleration at the angle point of the outer contour of the existing building and comparing the measured horizontal acceleration and the measured vertical acceleration with a standard horizontal acceleration and a standard vertical acceleration of the region during the moving process. The application considers the law of vibration propagation attenuation with distance and quantitatively digs the effective depth of the shock isolation trench, reduces the earthwork excavation of the shock isolation trench, reduces the construction cost, and effectively blocks the propagation of the vibration.

The invention discloses a reservoir Z-shaped asphalt concrete reservoir bottom structure and a construction method thereof.The structure comprises a low reservoir bottom face, a high reservoir bottom face and a Z-shaped anti-seepage body connecting the low reservoir bottom face and the high reservoir bottom face, and the Z-shaped anti-seepage body comprises a lower reverse arc face, a slope face and an upslope angle arc face which are sequentially arranged from bottom to top; the construction method comprises the following steps of: 1, leveling a site at the bottom of the warehouse in a zoning manner; 2, determining the gradient ratio of the slope surface of the Z-shaped anti-seepage body; 3, partition construction of the bottom of the reservoir; 4, building a temporary transportation road; fifthly, the Z-shaped anti-seepage body is constructed from bottom to top through the construction equipment set; and 6, dismantling the temporary transportation road. The slope protection structure is additionally arranged on the Z-shaped anti-seepage body to guarantee the construction quality, the conditions of continuous cold joints and non-compact rolling of the upslope angle are avoided through layered and segmented construction of the upslope angle asphalt concrete, the deformation adaptability of the reservoir bottom asphalt concrete is improved, the reservoir bottom cracking risk is reduced, the construction quality and anti-seepage performance of the asphalt concrete are guaranteed, and the construction period is shortened. Meanwhile, a large amount of excavation and filling are reduced, and the construction period is prolonged.

The utility model relates to a temporary supporting joint which comprises a plurality of vertical profile steel supports, a plurality of supporting base plates, a plurality of longitudinal connecting sleeves and a plurality of longitudinal connecting ribs. The supporting base plates comprise top base plates and bottom base plates which are in one-to-one correspondence, the top base plates and the bottom base plates are located in top surrounding rock and bottom surrounding rock at the intersection of the underground excavation air duct and the protective tunnel main body enclosure structure correspondingly, and the top base plates and the corresponding bottom base plates are located in the same vertical plane; the vertical profile steel support is arranged in the vertical direction, the horizontal section of the vertical profile steel support is in an I shape, and the top end and the bottom end of the vertical profile steel support are welded to the top base plate and the bottom base plate respectively. The longitudinal connecting sleeve is welded on the web plate, the longitudinal connecting rib is inserted into the longitudinal connecting sleeve, and the longitudinal connecting rib is arranged along the horizontal direction. According to the utility model, the air duct can be synchronously excavated on the outer side of the protective tunnel side wall, and the excavation and backfill work amount is reduced, so that the manufacturing cost is reduced.

The utility model belongs to the technical field of electric power civil engineering, and relates to an indoor cable tunnel below zero meter, which comprises a building structure and a bottom plate, a top plate and peripheral side walls of the cable tunnel, the building structure comprises foundation bearing platforms and frame columns, the foundation bearing platforms are arranged under the ground and arranged on the periphery, and the frame columns are arranged on the bottom plate and the top plate. The frame columns are arranged in the vertical direction of the center of the foundation platform, the side wall of the foundation platform is connected with a bottom plate, peripheral side walls are arranged in the space defined by the frame columns and connected with the frame columns, the height of the peripheral side walls is smaller than that of the frame columns, and the bottom plate is connected with the bottom plate. The house structure further comprises a transverse bearing structure and a longitudinal bearing structure which are connected with the bottom plate and the top plate respectively. According to the cable tunnel, original structural members of the cable tunnel and house structural members are designed in a combined mode and fused into a whole, the use amount of cast-in-place concrete is saved, the on-site foundation pit excavation amount is reduced, the construction cost is reduced, and the construction period of a project is shortened.

The invention relates to the technical field of foundation treatment and reinforcement, in particular to a bridge and culvert foundation treatment and reinforcement integrated technology which comprises the following steps that the geology is investigated in detail; determining structural parameters; construction materials are prepared; constructing a stirring pile; laying a composite cushion layer; installing a monitoring sensor; monitoring and evaluating the foundation; and maintaining and adjusting the foundation. According to the method, the treatment depth is large, the construction quality is easy to guarantee, compared with large-area gravel filler replacement and filling, the earthwork standard room-reinforced soil composite cushion layer technology has the advantages that the usage amount and the transportation cost of materials are reduced, the construction period is also greatly shortened, a large horizontal stable platform is not needed for a river silt foundation, and the construction site problem of a pile foundation method is solved; a large amount of sludge excavation amount is reduced, and the defects of a soil changing method are overcome; the intelligent system can grasp the state of the foundation in real time and adjust construction and reinforcement measures in time, it is ensured that the foundation can be kept stable under various complex conditions, and the problems of differential settlement, foundation instability and the like are avoided.

The construction structure for adding underground floors to existing buildings based on the original pile underpinning includes a new pile foundation cap fixed to the original engineering piles, and frame columns located above the new pile foundation cap and attached to the original engineering piles. The new pile foundation cap includes a bottom cushion layer and a brick formwork set on the bottom cushion layer. The brick formwork on all four sides is fixed to the bottom cushion layer to form the space for pouring concrete for the foundation. It also includes circumferential steel members, a reinforcement layer, and water-swellable waterstops. The circumferential steel members are fixed to the original engineering piles, and the reinforcement layer is welded to the circumferential steel members on both sides. Two water-swellable waterstops are fixed to the original engineering piles and are respectively set in the middle and lower middle parts of the new pile foundation cap. The application of T-shaped circumferential steel members and the reasonable use of steel bar welding and anchoring techniques in this application make the new structure and the original structure form an integral whole, improving the overall integrity and load-bearing capacity of the structure and meeting the requirements for underground floor addition.

This utility model discloses a composite foundation and its installation structure. The composite foundation includes: a pile foundation, inserted into the soil downwards along the ground level, with the end of the pile foundation sunk below the ground level; and a shallow pit concrete foundation, constructed around the pile foundation at a predetermined depth below the end of the pile foundation, used to fix the pile foundation. This utility model reduces the amount of earthwork excavation, the horizontal excavation area, and the vertical excavation depth, effectively reducing conflicts with surrounding underground pipelines and the risk of damage to them. Simultaneously, the shallow pit concrete foundation reduces the amount of concrete poured, shortens the construction period, and improves the overall construction efficiency of the composite foundation.

This invention relates to the field of construction technology in pebble-rich water-bearing areas, and more specifically, to a construction method for buildings in such areas. The method involves first digging drainage ditches around higher elevations to intercept surface water; then, integrating high and low elevation areas for unified excavation of the foundation pit, utilizing natural elevation differences and a gravity-fed drainage system using perforated UPVC pipes and graded crushed stone; setting up temporary water-retaining embankments and implementing staggered construction from high to low elevations, with closed-loop dedicated drainage channels at the junctions to direct water flow; installing prefabricated waterproof concrete collection wells in low-lying areas, forming a closed-loop waterproof system with foundation brick formwork and flexible waterproof membrane; and finally, constructing crushed stone drainage blind paths along the surrounding wall foundations and backfilling. This invention achieves continuous, all-weather, non-powered water control, ensuring the stability of the foundation pit slopes and zero leakage in the main structure. This invention is mainly applied to the construction of buildings in pebble-rich water-bearing areas.

The utility model discloses a comprehensive pipe ditch reinforcing structure, and relates to the technical field of municipal engineering. The comprehensive pipe trench reinforcing structure comprises a concrete reinforcing wall which is arranged on one side of the trench bottom of a comprehensive pipe trench and extends upwards, a plurality of vertically-arranged section steel columns are arranged in the concrete reinforcing wall, and the section steel columns are arranged in the trend of the comprehensive pipe trench at intervals; the lower end of the section steel column penetrates through the bottom of the concrete reinforcing wall and extends downwards into a foundation below the ditch bottom of the comprehensive pipe ditch. According to the comprehensive pipe trench reinforcing structure provided by the embodiment of the invention, excavation below the trench bottom of the comprehensive pipe trench is not needed, the excavation amount is greatly reduced, the construction period is shortened, and the comprehensive pipe trench reinforcing structure is particularly suitable for the situation that the construction space is limited due to the fact that a large number of cables are in use in the comprehensive pipe trench.

The utility model discloses a large -diameter water supply pipeline steel bar winding device relates to water supply pipeline repair technical field, including the trolley frame, the upper end of trolley frame is installed two and presents left and right symmetry to set up the side plate, rotatably installed with upper roller, lower roller and middle roller between two side plates, the upper roller is located the just above of lower roller, and the steel bar access channel is formed between the upper roller and lower roller, and the middle roller is located the front of steel bar access channel and keeps synchronous same -direction rotation with lower roller, and the middle roller is along vertical direction and is assembled in the side plate, the upper roller and lower roller synchronous reverse rotation drive steel bar steady progress transmission to the direction of close to the middle roller, simultaneously, the middle roller rises closely the steel bar processed along the vertical direction. Through setting up upper roller, lower roller and middle roller realized the spiral bending operation of steel bar, and the damaged area of large -diameter water supply pipeline is repaired by spiral steel bar instead of stainless steel lining pipe.

This invention belongs to the field of water conservancy and hydropower construction technology, specifically providing a construction method for excavating a single-sided bridge across a steep folded rock face road cut. The method includes the following steps: measuring and setting out according to design drawings; fabricating steel beams and installing them at the target location in the ditch; using machinery to excavate the slope along the designed route; excavating the slope overburden and upper strongly weathered rock; excavating the lower weakly weathered rock of the pre-splitted slope, using stepped blasting for rock excavation in stages; and completing the excavation of the single-sided bridge across a steep folded rock face road cut after inspection and acceptance. This invention solves the problems of large excavation volume, difficulty for machinery to cross gullies, collapse of upper deposits, and significant construction hazards associated with existing mechanical + blasting methods for excavating steep folded rock faces. This invention features minimal over-excavation, shorter construction period, guaranteed quality, safety and reliability, and reduced ecological impact.

The invention provides a shallow riverside groundwater treatment system and method. The shallow riverside underground water treatment system comprises a water pool with a water inlet area and a water outlet area and a water conservancy adjusting well arranged on the upstream of a polluted aquifer, a permeable layer is arranged in an underground soil layer, a plurality of water inlet holes are formed in the side wall, located on the permeable layer, of the water conservancy adjusting well, and the water pool is located on the downstream side of the water conservancy adjusting well. The pool is located underground, the water conservancy adjusting well is communicated with the water inlet area through a transmission pipe, an effluent weir communicated with the water outlet area is arranged on the outer side of the pool, and the effluent weir is communicated with a downstream river through a water outlet pipe; and a plurality of filler modules are arranged in the water tank. The filler is designed to be of a modular structure, online monitoring equipment is combined, the use performance of the filler module is accurately detected, timely replacement is achieved, the repairing effect is guaranteed, the activity of the filler module is guaranteed, and secondary pollution and blocking are avoided.

The present invention discloses an assembled lattice beam and an assembled rectangular slope protection structure, which relates to the field of slope engineering and solves the problems of cast-in-place reinforced concrete lattice beams with many construction steps, complex process flow, many quality control points, and difficulty in ensuring engineering quality. The technical solution adopted by the present invention is: an assembled lattice beam, including five modules, namely a middle assembly module, a top assembly module, a bottom assembly module, a side assembly module and a corner assembly module, and the crossbeam and longitudinal beam of each module form at least one rectangular frame; the five modules are respectively reserved with joints. The five modules can be spliced ​​on the slope to form a rectangular slope protection structure. The present invention converts the cast-in-place lattice beam into an assembled structure, and the five modules are prefabricated and processed in the project and maintained, reducing the on-site formwork support and steel bar binding work; the five modules are embedded on the stable slope surface, reducing the amount of foundation trench excavation and improving product quality.

The utility model provides a tower column inclined inhaul cable self-balancing wind power supporting structure system. The supporting structure system comprises an obliquely-arranged central tower column, and a wind turbine generator set is installed at the top end of the central tower column. A lower supporting frame is arranged on the lower portion of the central tower column, an inclined supporting frame is arranged in the middle of the central tower column, inhaul cable assemblies are arranged between every two of the central tower column, the inclined supporting frame and the lower supporting frame, and the bottom end of the central tower column and the bottom end of the lower supporting frame are installed on a plurality of independent bases through movable bases respectively. The inhaul cable assemblies are arranged between the inclined supporting frames and the lower supporting frames in a pairwise mode, so that the absolute value of the bending moment of the central tower column is greatly reduced and even is 0, and the construction cost of the tower is effectively reduced; meanwhile, the wind power tower and the wind turbine generator are assembled on the ground and then rotated in place, the process is simple, ultrahigh hoisting equipment is not needed, and the installation cost and the construction risk are greatly reduced.

The invention belongs to the field of metro construction, and particularly relates to a metro shaft limited space shield split launching technology which successfully solves the problem that a traditional integral launching mode is difficult to implement in a limited space by connecting a shield tunneling machine body, an equipment bridge and a trolley part in a split mode and assembling step by step according to the tunneling progress. The method has the remarkable advantages that the construction space requirement is reduced, the construction difficulty and cost are reduced, the construction flexibility and adaptability are improved, and the construction safety and quality are guaranteed, and an efficient, economical and safe solution is provided for construction under the complex geological conditions of urban subway tunnels and the like.

The application provides an anchoring type pile foundation beam gravity retaining dam structure, relates to the geological disaster prevention engineering technical field, and is suitable for debris flow prevention engineering under high and steep slope or soft foundation conditions. The structure comprises a dam body, a beam, an anti-slide pile, a continuous beam and a prestressed anchor cable system. The dam body is a cast-in-place structure and is arranged on the beam, the beam is connected with the anti-slide pile, the top of the anti-slide pile is transversely connected through the continuous beam to form an integral force structure, anchor holes are pre-set in the beam, the prestressed anchor cable system is arranged in the anchor holes and is connected with the foundation to make the dam body, the beam, the anti-slide pile and the foundation bear force cooperatively. The structure can reduce the excavation amount, improve the overall stability, the anti-slide capacity and the anti-overturning capacity of the retaining dam, and enhance the structural rigidity, and is suitable for complex geological conditions such as rock, soil and composite stratum.

The application discloses a comprehensive utilization tunnel structure of pumped storage power station and a use method thereof, which comprises a tunnel entrance, a tunnel front section, a tunnel middle section, a tunnel rear section and an energy dissipation section arranged in sequence, the tunnel entrance is provided with horizontal water flow channels and vertical water flow channels, and the horizontal water flow channels and the vertical water flow channels are communicated with the tunnel front section respectively; the tunnel middle section is arranged with a water discharge pipe front section, the tunnel rear section is arranged with a water discharge pipe rear section, the tunnel front section, the water discharge pipe front section, the water discharge pipe rear section and the energy dissipation section are sequentially communicated, and the water discharge pipe rear section is installed with a water discharge valve; ecological pipes are embedded in the tunnel front section, the tunnel middle section and the tunnel rear section, the front end of the ecological pipe is communicated with the vertical water flow channels, and the rear end of the ecological pipe is communicated with the energy dissipation section. The tunnel structure can realize flow guiding, flood discharge and ecological water supply, and compared with a traditional tunnel structure, the tunnel structure can greatly reduce the engineering quantity and investment cost.

The utility model discloses a steel bar confined concrete shield segment of coal mine support engineering technical field's suitable laser scanning identification, including a plurality of along the annular splicing fixed pipe piece prefabricated subassembly, every pipe piece prefabricated subassembly includes: ring shaped reinforcement cage, ring shaped reinforcement cage is the component framework of pipe piece prefabricated subassembly, spiral rib and annular structural rib, a plurality of spiral rib and annular structural rib extend along the inside annular of ring shaped reinforcement cage and axial interval distribution, spiral rib and annular structural rib are adjacent to each other and are fixedly connected with ring shaped reinforcement cage through positioning member, concrete, the concrete includes protective layer concrete, interlayer concrete and core concrete, the protective layer concrete is cladded in ring shaped reinforcement cage outside, the interlayer concrete is filled between ring shaped reinforcement cage and spiral rib. The utility model improves material utilization, reduces production cost, reduces the shaft and roadway excavation amount in the construction process of pipe piece support of coal mine inclined shaft.