3997 results about "Anchor bolt" patented technology

The invention discloses an automatic welding device and method for an electric iron tower foundation bolt assembly, and relates to the technical field of welding, the automatic welding device comprises a hollow base, a protective cover is fixedly mounted at the top of the hollow base, a rotating door is rotatably mounted on the inner wall of the protective cover, and a driving device is fixedly mounted at the top of the inner wall of the protective cover; an electric telescopic rod is fixedly installed at the output end of the driving device, and welding equipment is fixedly installed at the output end of the electric telescopic rod. The clamping device is arranged at the top of the hollow base, the clamping device comprises a motor, a bevel gear, a screw rod, a driven gear, a threaded block, a clamping plate, a sliding rod, a fixed plate, a sliding plate, a short rod, a limiting plate and a placing plate, four corners of a workpiece are clamped through the clamping plate, and the situation that the workpiece moves in the welding process, so that the welding position deviates is prevented; and through pressing of the limiting plate, the welding stability is improved.

The invention discloses an old wind power plant fan foundation small-to-large capacity increasing structure and a transformation construction method. The old wind power plant fan foundation small-to-large capacity increasing structure comprises an original fan foundation, a newly-poured reinforced concrete foundation, a vertical anchor bolt cage connecting system and a radial anchor bolt connecting system. The connecting structure of the bottom section of the new fan tower drum and the new fan foundation comprises a vertical anchor bolt cage connecting system and a radial anchor bolt connecting system. The vertical anchor bolt cage connecting system is fixed in the original fan foundation, and the radial anchor bolt connecting system is fixed in the newly-poured reinforced concrete foundation. According to the new fan foundation, the diameter of the middle pier is expanded so as to arrange a new tower tube, the height of the middle pier is not changed, the height of the middle pier of the newly-poured foundation almost does not need to be increased, and the using amount of concrete is greatly reduced. Meanwhile, according to the structure, an original vertical anchor bolt cage connecting system is reserved, a radial anchor bolt connecting system is adopted for enhancing connection between the bottom section of the fresh air fan tower barrel and the fan foundation, the transformation cost and the connection reliability are effectively controlled, and the maximization of reutilization of the original fan foundation and the controllability of the cost of the fresh air fan foundation are achieved.

The present invention relates to the technical field of underground engineering rockburst prevention and control safety. Provided is a quantitative design method for rockburst energy absorption prevention and control. The method comprises: firstly, establishing an underground-engineering finite-element numerical calculation model, and performing underground-engineering excavation simulation calculation; delineating the location and range of rockburst damage and a rockburst pit depth according to an LERR value, and providing the amount of released energy at different positions during a rockburst; then, determining the location, trend and inclination angle of a structural plane; and then, determining the design length of a free section of each energy absorption anchor bolt, and determining an optimal length of each single energy absorption anchor bolt in combination with a design anchoring force of the anchor bolt; then, calculating ejection kinetic energy of rockburst rocks; and finally, determining the length of an anchoring section of each energy absorption anchor bolt, the total length of each anchor bolt, and the number of anchor bolts, such that the total energy absorption capacity of all the energy absorption anchor bolts is greater than the ejection kinetic energy when a rockburst occurs. The method provides a quantitative design method and process for energy absorption anchor bolts, and provides a design basis for scientific design of rockburst energy absorption prevention and control.

The invention relates to the related technical field of steel column construction, and particularly discloses a super high-rise building steel column embedded type column foot construction device and a construction technology thereof.The construction device comprises a foundation, a steel column, a rib plate, a bottom plate and anchor bolts, the position, below the rib plate, of the steel column is fixedly connected with a pouring plate, and a cavity is formed in the bottom plate; a fixing assembly used for fixedly clamping a steel column is arranged below the bottom plate, an auxiliary assembly used for removing bubbles from concrete is arranged on the side face of the steel column, two sets of clamping blocks move in a cavity of the bottom plate, the bottom plate can be clamped and fixed, and the stability of the steel column during pouring is improved; and meanwhile, when a screw rod rotates to drive a threaded sleeve to rotate in an adjusting block, a steel column above the adjusting block can be pulled for position adjustment, and the adjusting block can drive a wedge-shaped block to extrude a cylindrical head and apply reverse extrusion force to a driving part, so that the clamping and limiting effects of a clamping block on a bottom plate are improved.

The invention discloses a non-contact monitoring method for the axial force of an end anchoring anchor rod, and relates to the technical field of anchor rod axial force measurement. The monitoring method comprises the steps that firstly, relevant parameters of surrounding rock, relevant parameters of an anchor rod in the anchoring process and relevant parameters of an anchoring agent are obtained; acquiring strain data of an anchor rod tray in the anchoring system by adopting a full-field strain measurement system, transmitting the strain data to a data processing module of the full-field strain measurement system, and acquiring anchor supporting force by virtue of a stress-strain relationship of the anchor rod tray; finally, a calculation analysis formula of the mechanical relation between the anchor supporting force Ft generated by the anchor rod tray and the anchor rod axial force F is constructed in a computer; and inputting the values of the related parameters obtained in the step 1 and the step 2 into a calculation analysis formula, and calculating to obtain the axial force of the end anchoring anchor rod. By means of the method, non-contact measurement of the anchor supporting force of the anchor rod can be achieved, and the integrity of an anchoring system is further protected.

The utility model discloses a heat-preservation and energy-saving building column foundation heat-preservation joint which comprises an embedded part, a steel column and a high-strength heat-preservation cushion block. The embedded part comprises a positioning plate and a column foot anchor bolt and is embedded in the positioning plate when a reinforced concrete structural plate is poured, a higher part of the column foot anchor bolt is exposed according to the elevation of a steel column foot bottom plate, a high-strength heat preservation cushion block is arranged on the upper portion of the positioning plate, a hole is reserved in the position, corresponding to the column foot anchor bolt, of the high-strength heat preservation cushion block, and the column foot anchor bolt penetrates through the hole. A steel column base bottom plate penetrates through a column base anchor bolt to fall on the high-strength heat preservation cushion block and is firmly connected with the column base anchor bolt through a nut, a steel cover plate is arranged on the periphery of the steel column, the steel cover plate and the ground surface layer are located on the same horizontal plane, and the space between the steel cover plate and the steel column base bottom plate is filled with foaming polyurethane. On the premise that the structure bearing requirement is met, cold (heat) breaking is conducted on the column foundation part, a heat preservation surface layer does not need to be additionally adopted to wrap a building inner structure column (steel column), the size of the built building inner structure column is appropriate, and building space does not need to be additionally occupied.

The invention discloses an anchor rod type mine laneway surrounding rock stress monitoring system, which comprises a hollow anchor rod, a high-precision strain rosette, a strain collector, a gateway, fault prediction and health management software and a server, and is characterized in that the rod body of the hollow anchor rod is of a hollow structure, the high-precision strain rosette is fixed in the hollow rod body, and the strain collector is fixed in the hollow rod body; the strain collector communicates with the gateway through an RS485 bus, the gateway communicates with the fault prediction and health management software and the server in an optical fiber mode, a hollow anchor rod supporting product which is most commonly used at present is utilized in the scheme, the high-precision resistance type strain gauge is arranged in the hollow anchor rod supporting product, the installation form is consistent with that of an anchor rod, and the high-precision resistance type strain gauge can penetrate into a rock stratum; the distributed roadway surrounding rock stress monitoring system is formed, the mine roadway surrounding rock stress change condition can be accurately and comprehensively monitored and pre-warned in real time, different pre-warning signals are sent out in advance, maintenance workers are supervised and urged to take reinforcement measures or evacuate in time, and therefore collapse accidents are avoided.

The invention relates to the field of foundations for vertical rods, in particular to a wind generating set foundation anchor bolt installation auxiliary device and an anchor bolt assembly. The auxiliary device comprises a positioning support and an anchor bolt righting assembly, the positioning support comprises stand columns and a cross beam located on the two stand columns, and the anchor bolt righting assembly comprises a guide column in vertical guide fit with the cross beam, holding claws and a lifting elastic device. The telescopic block is provided with upper clamping teeth used for being connected with an upper end thread section of a common anchor bolt in a clamped mode, the holding claws are provided with limiting sliding blocks and are provided with holding elastic devices, and anchor bolt positioning blocks are connected to the lower ends of the holding claws in an inserted mode respectively. The anchor bolt positioning block is provided with an outer peripheral face used for being in positioning fit with an anchor bolt hole of an upper anchor plate and an inner side face used for being in positioning fit with the upper end threaded section, and the anchor bolt positioning block is provided with lower clamping teeth used for being connected with the upper end threaded section of a common anchor bolt in a clamped mode. The problem that a common anchor bolt of an anchor bolt type foundation deflects after being installed on a lower anchor plate is solved.

An improved anchor bolt apparatus that includes a rotating blade at one end and may also include a removable viewing box on the opposite end that are adapted to allow a J-Bolt to be replaced from the outside of a building without the need of cutting drywall or any exterior siding. Furthermore, the removable box may be used to allow an engineer to view and certify the proper tightening of the anchor bolt securing the vertical walls and framework of the building to its foundation.

The invention relates to a diagnosis method for judging a loose part of rotating equipment. The diagnosis method comprises the following steps: (1) collecting vibration data; (2) spectrum characteristic analysis; (3) differential vibration testing; (4) positioning a loose part; and (5) dynamic verification and optimization. The device has the advantages that through multi-dimensional vibration data acquisition, vibration sensors are arranged at key parts such as motor feet, a bedplate and foundation bolts, vibration displacement values in the horizontal direction, the vertical direction and the axial direction are measured, multiple test points are divided to synchronously acquire data, and vibration information of rotating equipment can be comprehensively acquired. And combining frequency spectrum characteristic analysis and differential vibration comparison, comparing vibration displacement value differences of different hierarchical structures of the same part, and calculating a difference threshold value, so that the specific loose part of the A-type machine is accurately positioned, the limitation that accurate positioning is difficult to realize by traditional experience-dependent judgment or single vibration amplitude analysis is broken through, the blindness of maintenance is reduced, and the working efficiency is improved. The maintenance efficiency is improved.

An improved anchor bolt apparatus that includes a rotating blade at one end and may also include a removable viewing box on the opposite end that are adapted to allow a J-Bolt to be replaced from the outside of a building without the need of cutting drywall or any exterior siding. Furthermore, the removable box may be used to allow an engineer to view and certify the proper tightening of the anchor bolt securing the vertical walls and framework of the building to its foundation.

The expansion anchor bolt sleeve screening and conveying equipment comprises a rack, a feeding mechanism, a pressing mechanism and a rotating drive, the feeding mechanism comprises a feeding machine and a conveyor, the pressing mechanism comprises a hinge plate and a rotating shaft, and the rotating drive comprises a clamping block and a push plate. Deflection is carried out through the hinge plate, so that the sleeves which are not clamped into the rotating disc can be downwards pressed and conveyed to the bearing plate, and the sleeves are driven by the insertion rod to be overturned and then output; the sleeve with the opening facing the same side as the rotating disc can be clamped into the through groove, then is driven by the rotating disc to be screwed out and then is output, so that the condition that the imaging equipment is easy to screen and convey mistakenly is avoided; by arranging a first spring and a lower pressing shell, the pressure on the next sleeve is reduced, and the next sleeve is prevented from being damaged; and the multiple rolling shafts are driven to rotate through the second rotary driving device, so that the sleeves, extruded by the lower pressing shell, on the hinged plates can rapidly slide out of the hinged plates, and therefore the screening efficiency is improved.

The invention provides a composite protection structure suitable for underwater seepage prevention and explosion prevention of a concrete gravity dam and a preparation and construction method, and belongs to the technical field of engineering explosion prevention and seepage prevention. The composite protection structure comprises a reinforced concrete slab anchored on the outer surface of the gravity dam by a certain distance through an anchor rod; a reserved interlayer between the reinforced concrete slab and the outer surface of the gravity dam is filled to form an anti-seepage and anti-explosion composite layer; the anti-seepage and anti-explosion composite layer is formed by pouring hollow glass bead-asphalt concrete, and the hollow glass bead-asphalt concrete is prepared from asphalt concrete with modified hollow glass beads as filler; the modified hollow glass beads account for more than 15% of the asphalt concrete by volume, and the asphalt concrete has enough sealing gas for reflecting explosive shock waves and has the characteristics of seepage prevention and energy dissipation. The composite protection structure has anti-seepage and anti-explosion functions, the service life of the dam is prolonged, and the ability of the dam to resist sudden extreme working conditions is improved.

The invention relates to the technical field of building construction, in particular to a tubular column foot pre-embedding positioning method and device. The method comprises the steps of obtaining a steel structure construction drawing; constructing a tubular column and embedded foundation bolt construction model according to a steel structure construction drawing; according to the construction model, a positioning relation between the embedded foundation bolts and the vertical main reinforcements is established; construction model collision analysis and a three-dimensional simulation experiment are carried out based on the positioning relation of the embedded foundation bolts and the concrete main reinforcements; and processing and mounting the steel structure device based on the construction model. By optimizing construction nodes, the engineering quality is improved, the problem that the embedded steel plate cannot be reused is solved, the vertical column rib and foundation bolt embedded steel plate grinding tool is controlled to freely stretch out and draw back to control the position of the reinforcing steel bar, the effect of reusing different column diameters is achieved, the construction efficiency is improved, the progress is accelerated, and the construction cost is reduced. And the method has good economic and social benefits.

The invention relates to the technical field of wind power, and discloses a lattice type foundation for a wind power tower and a construction method thereof.The foundation comprises a plurality of bearing platforms, and a cross beam is fixedly connected between every two adjacent bearing platforms; a lattice type wind power tower column can be erected on the upper side of the bearing platform; an embedded pipe is reserved in the center of any bearing platform and used for penetration of a prestressed steel strand, and the prestressed steel strand can be fixed to the top face of the tensioning cavity; a tensioning cavity is formed in the bottom surface of any bearing platform and can be used as a prestressed steel strand tensioning or anchoring operation space; any bearing platform is provided with a pre-stressed anchor bolt assembly, and the pre-stressed anchor bolt assembly is suitable for being fixed to a lattice type wind power tower column. The multiple bearing platforms are adopted for providing support for fixing of the lattice type wind power tower, compared with a fan foundation of a traditional cylinder type tower, the land acquisition area can be remarkably saved, the material cost is reduced, and the wind power tower foundation is suitable for various terrain environments.

An anchor rod mounting trolley belongs to the technical field of tunnel construction and comprises a movable chassis, a grouting system and an operation system. The operating system comprises a working arm, a hanging basket device and a propelling device; the grouting system and the working arm are both installed on the movable chassis, the hanging basket device is installed on the working arm, and the propelling device is installed on the hanging basket device. The grouting system is used for injecting grout into an anchor rod hole; the working arm is used for adjusting the positions of the hanging basket device and the propelling device relative to the anchor rod hole; and the propelling device is used for inserting the anchor rod body into the grouted anchor rod hole. The mechanical degree can be improved, the labor intensity is reduced, the operation efficiency is improved, and the construction cost is reduced.

The utility model relates to the technical field of mechanical anchor bolt installation, and discloses a mechanical anchor bolt automatic feeding machine which comprises a frame, a feeding mechanism is arranged on the inner side of the frame, a material taking mechanism is arranged at the top of the feeding mechanism, an adjusting mechanism is arranged at one end of the material taking mechanism, the feeding mechanism comprises a supporting plate, and the supporting plate is arranged on the supporting plate. The automatic feeding machine comprises a supporting plate, a transmission assembly is arranged at the top of the supporting plate, a circulating type stock bin is fixedly connected to the top of the supporting plate, a material belt for conveying is installed in the circulating type stock bin, and a material buckle is fixedly connected to the outer portion of the material belt. And then the mechanical anchor bolts are taken out through the material taking mechanism, automatic fixed-distance feeding is carried out, then the mechanical anchor bolts are accurately conveyed into automatic operation equipment through the adjusting mechanism, automatic fixed-distance feeding is completed, manual climbing for loading is reduced, and the danger is reduced. And the working efficiency is improved.

The invention provides a foundation pit supporting system, and belongs to the technical field of constructional engineering. According to the structure, an inner supporting frame is located in an outer supporting frame, a rectangular steel column of a bridging frame is located between the outer supporting frame and the inner supporting frame, the two Y-shaped ends of the bridging frame abut against the inner wall of the outer supporting frame and the outer wall of the inner supporting frame respectively, and a connecting disc of the bridging frame abuts against the inner wall of the inner supporting frame; the reinforcing anchor rods extend into the external contact structure, and a plurality of vertical supporting columns are arranged on the outer wall of the outer supporting frame. A frame structure with an inner layer and an outer layer is constructed, on the basis, a whole is formed through the bridging frames, and the reinforcing anchor rods are installed; the reinforcing anchor rod is wedged into the soil layer of the foundation pit and is fixed with the soil layer by using the anchor bolt with the wing plate and the aileron, so that the stability is fully enhanced; meanwhile, the vertical supporting columns are arranged on the outer side of the outer supporting frame, and the structural strength is guaranteed. The supporting structure has better structural strength and is stable and reliable when used for supporting the foundation pit.

The utility model relates to the technical field of indoor overhead ground construction, in particular to an overhead ground structure suitable for a large-specification ceramic tile surface layer, which comprises a building floor slab, a supporting structure arranged above the building floor slab and a ground structure arranged above the supporting structure, the foundation bolt comprises an elastic rubber base, a supporting screw rod and a bearing and supporting nut which are sequentially connected, the supporting screw rod comprises a screw rod base plate and a screw rod structure, and a screw rod drainage hole is formed in the screw rod structure in the length direction in a penetrating mode; the ground structure comprises a first calcium silicate board, a high-strength extruded sheet, a second calcium silicate board and ceramic tiles which are sequentially and upwards laid above the supporting structure, a threaded hole groove is formed in the bottom face of the first calcium silicate board, a bearing supporting nut is in threaded connection with the bottom face of the first calcium silicate board, and a bearing disc of the bearing supporting nut abuts against the bottom face of the first calcium silicate board. Installation is convenient and reliable.

The invention relates to the technical field of shield tunnel reinforcement, and discloses a tunnel lining reinforcement assembly and method based on orthotropic steel plates combined with chemical anchor bolts, which are used for improving the bending resistance, torsion resistance and long-term stability of segment joints. The assembly comprises an orthotropic steel plate, a chemical anchor bolt and a bi-component modified epoxy resin structural adhesive, and the orthotropic steel plate is bonded to the inner side of the duct piece through the structural adhesive and anchored through the chemical anchor bolt; the steel plate is provided with an adjustable longitudinal stiffening rib (U-shaped or V-shaped) and a diaphragm plate, and parameters of the steel plate are optimized through numerical simulation. The arrangement density of the chemical anchor bolts is designed in a partitioned mode according to the stress characteristics of the duct pieces, interface scabbling pretreatment and structural adhesive bonding are combined, and the interface connection strength is enhanced. Through the synergistic effect of the orthotropic plates and the anchor bolts, flexible adjustment of reinforcing parameters is achieved, the bearing performance and the material utilization rate are remarkably improved, tunnel deformation is effectively restrained, construction is convenient, and long-term stability is high.

The utility model discloses a drawing instrument capable of monitoring the displacement amount of an anchor rod in real time, which comprises a counter-force gasket, a sleeve, a tension oil cylinder, a steel wire type spring displacement meter and a connecting rod, the counter-force gasket, the sleeve and the tension oil cylinder are sequentially arranged in a contact mode, one end of the connecting rod penetrates through the tension oil cylinder and the sleeve and then is in threaded connection with the exposed end of the anchor rod, and the other end of the connecting rod is in threaded connection with the steel wire type spring displacement meter. The other end penetrates through the tension oil cylinder and then is in threaded connection with a locking nut; the steel wire type spring displacement meter is arranged on the counter-force gasket and the tension oil cylinder and is fixed through elastic force of the steel wire type spring displacement meter. The drawing instrument provided by the utility model can measure and record the displacement of the anchor rod in real time in the drawing process of the anchor rod, simultaneously generates an anchor rod displacement-time whole-process curve, observes the displacement change trend of the anchor rod, and can export data in the later period, so that engineers can comprehensively evaluate the performance of the anchor rod.

The invention discloses an automatic assembling device for casing pipe type expansion anchor bolt production. The automatic assembling device comprises a machining platform, a casing pipe conveyor, a mechanical arm and a bolt conveyor, a casing pipe conveying mechanism is arranged on the machining platform, an assembling mechanism is arranged on the machining platform, and a rolling mechanism is arranged on the machining platform; the sleeve conveying mechanism comprises a fixed vertical plate, a fixed through groove, a C-shaped guide plate, a connecting through groove and a separation part, and the separation part shields the sleeves so that the sleeves can be conveyed in sequence; the assembling mechanism comprises a U-shaped feeding groove, an assembling groove, a discharging through groove, a discharging part and an assembling part, the discharging part supports the sleeve and discharges the expansion anchor bolt, and the assembling part combines and clamps the sleeve and the bolt. The device has the beneficial effects that blanking is facilitated, the working efficiency is improved, a sleeve and an anchor bolt can be clamped, rolling position deviation is avoided, the rolling quality is improved, the assembling quality is improved, the anchor bolt is prevented from falling off from the sleeve, and the product quality is improved.

The invention relates to the technical field of mining engineering and geotechnical engineering support design, and discloses a roadway anchor rod group support parameter intelligent optimization method based on unbalanced force, and the method comprises the steps: building a surrounding rock finite element model, calculating a plastic stress increment through employing a minimum plastic complementary energy principle, and mapping the plastic stress increment into a node unbalanced force vector; an unbalanced force field reflecting reinforcement requirements is constructed, and an initial scheme is generated according to the unbalanced force field. Then, a virtual anchor rod unit is introduced to establish a nonlinear coupling model, an incremental balance equation is solved, and whether the unbalanced force is smaller than a threshold value or not is judged; if so, outputting an optimal parameter; otherwise, a comprehensive objective function containing safety and economy is constructed, new parameters are obtained through searching and decoding by means of the particle swarm algorithm, and the virtual anchor rod unit is re-entered for calculation to form a closed loop until convergence is achieved. According to the method, intelligent optimization is driven through a physical mechanism, the problem that a traditional design lacks a mechanical basis is solved, and accurate optimization of support parameters is achieved.

The invention discloses an integral dismantling method for a rigid frame bridge hanging basket formwork, and relates to the technical field of bridge engineering construction. The problems that in the prior art, the rigid frame bridge hanging basket formwork dismantling efficiency is low, potential safety hazards are high, and cost is high are solved. The dismantling method comprises the following steps of: pre-burying a winch anchor bolt to anchor a winch; loosening a hanging basket anchor system to separate a hanging basket bottom die from a concrete box girder; arranging four winches to be matched with fixed pulleys; synchronously lifting the hanging basket bottom die for static load test, then synchronously lowering the hanging basket bottom die to the ground, and decomposing and dismantling the hanging basket bottom die on the ground. And the hanging basket truss is disassembled on the bridge floor. The integral dismantling method for the hanging basket formwork of the rigid frame bridge is used for dismantling the hanging basket bottom formwork of the rigid frame bridge, an integral dismantling mode is adopted, high-altitude split operation of the hanging basket bottom formwork is converted into integral ground dismantling, the operation time is shortened, and the dismantling efficiency is improved; the template loss is reduced, and the cost is reduced; aloft work is reduced, and potential safety hazards are reduced. The method is particularly suitable for large-span bridge engineering crossing rivers and seas or expressways.

The invention relates to the technical field of nut spraying equipment, and discloses a full-automatic feeding device for nut spraying, which comprises a supporting frame, the supporting frame is mounted on the ground through foundation bolts, a workbench is mounted on one side of the upper end of the supporting frame, a fixing frame is mounted on the other side of the upper end of the supporting frame, and a material guiding mechanism is mounted on the workbench; a hanging mechanism is mounted on the workbench; the material guiding mechanism comprises a feeding channel, a moving frame, a containing table and a containing groove. The hanging mechanism comprises a lifting frame, a hanging net, a hook and a pushing frame. The automatic nut hanging device has the beneficial effects that nuts can be moved into the containing groove through the vibration disc and the feeding channel, then the nuts can be pushed to the hooks through the pushing frame, the hanging net can be driven to move up and down through the lifting frame, more nuts can be hung on the hanging net, the function of automatically hanging the nuts is achieved, participation of workers is not needed, and the working efficiency is improved. The labor intensity of workers is reduced, and the working efficiency is improved.

The utility model relates to the technical field of bridge padstone construction, in particular to a device for detecting a reserved embedded hole of a support padstone. Comprising a cross ruler, movable ruler sleeves, two positioning rulers and a hole checking ruler, the hole checking ruler penetrates through the two positioning rulers, each positioning ruler is sleeved with the corresponding movable ruler sleeve, and the cross ruler is arranged below the two positioning rulers; the cross ruler comprises a mounting column and four rotating rulers, the center line of a support of the padstone is firstly released, the cross ruler is aligned with the center line of the support, the movable ruler sleeve is adjusted to the center position of the support, the positioning ruler is inserted into the movable ruler, and the positioning ruler is adjusted. After the extension sizes of the positioning rulers in the two directions are determined, the hole checking ruler is put into the anchor bolt hole, the hole position is lightly put down, if no obstacle is encountered, it is clearly indicated that the anchor bolt hole meets the requirement, and if the obstacle is encountered, recording is conducted, the obstacle direction is determined, and staff handling is facilitated after marking; in this way, the effect of accurately judging the hole position and hole depth can be achieved.

The invention belongs to the technical field of mining construction, and particularly relates to an artificial roof structure and a construction process thereof. The construction process comprises the steps that S1, anchor rod holes are constructed in the positions, 1 m away from a bottom plate, of two sides of a stope, S2, ore cushion layers with the thickness of 200 mm are laid and leveled, S3, I-shaped steel bottom beams are erected and fixed through round steel anchoring parts and welding base plates, S4, a reinforcing mesh is laid, main ribs and auxiliary ribs are bound in a crossed mode and welded to anchor rods, according to the composite structure design of the double-layer reinforcing mesh, the steel wire mesh and the hanging bar system, a three-dimensional stress system is formed, the bending resistance and the shearing resistance of the false roof are remarkably improved, the problem that a traditional false roof is prone to cracking and sinking is solved, and the false roof has the advantages of being simple in structure, convenient to use, economical and practical. Due to the layered matching design of the full-tailing cemented filling body, the bearing strength is guaranteed, seamless roof contact is achieved, the risk of roof hollowing is reduced, the pressure of stope operation circulation is relieved, the ore removal efficiency is improved, and the mining cost is reduced.

The invention provides a seamless steel pipe for a hollow anchor rod and a strength regulation and control method thereof. Alloy steel round steel is heated and then subjected to hot piercing to be manufactured into a hollow pipe blank; the hollow pipe blank is subjected to spheroidizing annealing treatment and then cooled, and a first treated steel pipe is obtained; wherein the ferrite grain size D1 of the first treated steel pipe is calculated according to a spheroidizing annealing grain size model; the first treated steel pipe is subjected to cold finish rolling forming and cleaned to obtain a second treated steel pipe; the ferrite effective grain size Ddef of the second treatment steel pipe is calculated according to the cold deformation grain refinement model; recrystallizing and annealing the second treated steel pipe to obtain the seamless steel pipe; the ferrite grain size D2 of the seamless steel pipe is calculated according to the recrystallization grain evolution model; the yield strength Rp0.2 of the seamless steel pipe is calculated according to a strength model; reverse design of the yield strength of the seamless steel pipe is achieved, and meanwhile it is guaranteed that the seamless steel pipe has good plasticity.

The utility model discloses an ultra-low energy consumption external thermal insulation system of a VICP composite thermal insulation board thin plaster external wall for a building, which relates to the technical field of external thermal insulation systems of external walls and comprises a waterproof leveling layer, a cementing layer, a double-layer VICP composite thermal insulation board, a single-layer VICP composite thermal insulation board and a protective layer. The double-layer VICP composite insulation boards are adhered to the outer side of the waterproof leveling layer through the cementing layer, a heat bridge breaking anchor bolt is installed between every two adjacent double-layer VICP composite insulation boards of the base layer wall body, the cross section of each double-layer VICP composite insulation board is of a step-shaped structure, and each single-layer VICP composite insulation board is embedded in the step position of every two adjacent double-layer VICP composite insulation boards. The two VICP composite insulation boards are bonded to the outer sides of the heat bridge breaking anchor bolts through adhesives, and the protective layers are fixedly connected to the outer sides of the two VICP composite insulation boards. According to the utility model, the two kinds of VICP composite insulation boards are matched with the thermal bridge breaking anchor bolt, so that the thermal bridge effect caused by an anchor bolt hanging piece is avoided, and the requirements of high insulation property and ultra-low energy consumption are met.