246results about How to "Good for deformation control" patented technology

The invention discloses a large cross-section weak surrounding rock tunnel three-step and six-part short-distance construction method, which comprises the steps as follows: (1) annularly excavating an upper step of an upper part arc pilot tunnel, transferring excavated earthwork of the upper step to a lower step; (2) excavating a left part of a middle step about 4.5-5 meters behind the upper step, and transferring excavated earthwork to the lower step; (3) excavating a right part of the middle step about 3-4 meters behind the left part of the middle step, and transferring excavated earthwork to the lower step;(4) excavating a left part of the lower step about 6-8 meters behind the left part of the middle step or about 3-4 meters behind the right part of the middle step, and conveying excavated earthwork of the left part of the lower step out of the tunnel; (5) excavating a right part of the lower step about 3-4 meters behind the left part of the lower step, and conveying excavated earthwork of the lower step out of the tunnel; and (6) excavating the rest part of the tunnel bottom about 20-25 meters behind the right part of the lower step, excavating continuously according to the steps in a circulating and interlacing manner, and finally realizing tunnel excavating construction. The method can be used for building a large cross-section tunnel in a safe, rapid and economic manner.

The invention relates to a thermal treatment deformation control method for a duplicate spiral bevel gear. By carburizing on a component for twice, a problem that carburizing layers of different parts of the component are different in depth is solved, and the conventional quenching mode is changed; allowance is reserved during machining, and the machining allowance is changed into deformation compensation dosage under the action of quenching pressure of a mould on the top of the bevel gear, so that the carburizing layer precision of the duplicate spiral bevel gear is controlled within 0.1mm, and the +/-10' error control on taper angle at two sides is realized. The thermal treatment deformation control method disclosed by the invention is reasonable in process technology, remarkable in deformation control effect, and capable of providing a novel thought for deformation control of similar products.

A new process for producing a seamless steel pipe comprises the following processing steps: firstly, producing a hollow pipe blank, at one end of which an annular cup bottom is arranged, through centrifugal casting; secondly, mechanically processing the inner surface and the outer surface of the hollow pipe blank; thirdly, heating the processed hollow pipe blank; fourthly, performing pipe jacking mill processing to the heated hollow pipe blank, and obtaining pipe fittings meeting the requirements of the wall thickness, the diameter and the length; and fifthly, after bar loosening and bar releasing, performing end cropping and finishing operation to the pipe fittings after the pipe jacking mill processing, and obtaining qualified finished product pipe materials. The invention can produce a high-quality stainless steel and special steel pipe difficult to process, and overcomes the defects in the prior art, so as to form an energy-saving, high-quality and economic new process with the short procedure for producing the seamless steel pipe compared with the traditional method.

The invention relates to an extremely-high geostress soft rock large-deformation tunnel multistage pressure-yielding and pressure-resisting support structure and a construction method thereof. The construction method comprises the following steps: excavating a tunnel with a nearly circular section, then driving long anchor cables and short anchor rods into surrounding rock, erecting ring-shaped profile steel frames at tail ends of the long anchor cables and the short anchor rods and spraying concrete, additionally driving reinforcement lengthened or encrypted anchor cables into the surroundingrock, then erecting steel frames and spraying concrete again to form multilayer extension support; constructing a reinforced concrete lining structure on the inner side of the multilayer extension support, and forming the multistage pressure-yielding and pressure-resisting support structure through the long anchor cables, the short anchor rods, multilayer support and the reinforced concrete lining structure. According to the extremely-high geostress soft rock large-deformation tunnel multistage pressure-yielding and pressure-resisting support structure, the pressure is actively released by reserved deformation; the long anchor cables and the short anchor rods are used for anchoring in time with high pre-tightening force, enabling the pressure of the surface surrounding rock to be transferred to the deep part of the surrounding rock and expanding the surrounding rock bearing ring; the pressure-yielding support structure is used for providing high resistance and continuous deformation capacity; the reinforced concrete structure is used for resisting rheomorphism; the deformation of the surrounding rock can be effectively controlled; long-term stability of the structure can be ensured.

The invention provides a structure for improving rigidity and stability of a foundation pit steel support; a plurality of fish-belly sill enclosing purlins are arranged on the surrounding of a foundation pit; section steel bracings for connecting the fish-belly sill enclosing purlins are arranged in the middle of the foundation pit; edge corners of the foundation pit are provided with section steel angle braces for connecting the fish-belly sill enclosing purlins; the section steel bracings or the section steel angle braces are formed by more than two parallel section steels; the section steels are connected with each other by bolts in a length direction; the structure is characterized in that transverse and inclined fixed plates are arranged on the parallel section steels in a width direction; the fixed plates connected to the section steels by bolts; and the transverse fixed plates and the inclined fixed plates form triangular stable structures together with the section steels; and the structure for improving the rigidity and the stability of the foundation pit steel support, provided by the invention, has the advantages of large structural rigidity, good stability, small foundation pit deformation, convenience in construction, recyclable material and so on; and purposes of reducing construction period and reducing construction cost are achieved.

The invention discloses a large recovered oil and gas tank, which comprises a standard elliptic end enclosure and a cylinder assembled and welded with the end enclosure to form the tank, and is characterized in that: the end enclosure is formed by assembling and welding 3 roof round plates and side plates, which are formed by cold pressing molding; the roof round plates are assembled and welded to form the top end part of the standard elliptic end enclosure; the top end part is in a partial spherical shell shape with a sphere center angle between 18 and 28 degrees; the side plates are welded on the edge of the top end part and extend to form a side edge part; 2 to 3 rib plates are welded at the weld joints of the roof round plates and the side plates, which are assembled and welded, to prevent welding deformation; and the cylinder is formed by assembling and welding cylinder joints one by one; and each cylinder joint is formed by using pressing heads of three steel plates, rolling thesteel plates, checking the curve of each steel plate petal and assembling and welding. The entire large recovered oil and gas tank has a reasonable structure, is convenient for transport and on-site processing, and has high molding quality.

The invention discloses a repeated plate ring wave drawing intense deformation die and technology. The die comprises an upper ring wave die body and a lower ring wave die body, wherein the upper surface and the lower surface of the upper ring wave die body are formed by a plurality of circles of concave-convex, continuous, alternative and coincident ring waves, and the upper surface and the lower surface of the lower ring wave die body are formed by a plurality of circles of concave-convex, continuous, alternative and coincident ring waves. The upper ring wave die body is connected with a movable cross beam of a hydraulic machine. The lower ring wave die body is fixed to a working table board. The upper ring wave die body is a movable die, and the lower ring wave die body is a fixed die. Two locating mechanisms arranged symmetrically in the radial direction are arranged at the upper end of the lower ring wave die body and can locate a plate. The upper ring wave die body and the lower ring wave die body are guided through a guide column and a guide sleeve which are arranged symmetrically in the axial direction, and directly participate in formation of the plate. By means of die closing, the plate is drawn to a set ring wave shape. According to the technology, through the die, repeated drawing is carried out for deforming and refining plate grain particles to enable the size of the grain particles to reach the micrometer level or the sub-micrometer level, finally, a flattening die is used for flattening the deformed plate, and a smooth plate is obtained. The die is free of restrictions of the size of the plate, the plate in the large size can be machined, and the comprehensive performance of the aspects such as physics, chemistry and mechanics of the plate are improved greatly.

The invention belongs to the field of rail vibration reduction and noise reduction, and provides a chute-mounted suspended steel rail vibration reduction fastener. A structure for limiting a lateral bracket (3) is arranged at the joint position of a fastener bottom plate (4) and the lateral bracket (3), and the limiting structure is provided with at least one limiting surface I (6) for limiting the lateral bracket (3) to move in the laying direction of a steel rail and at least one limiting surface II (14) for limiting the lateral bracket (3) to move vertically; and a space for allowing the lateral bracket (3) to horizontally move in the direction vertical to the laying direction of the steel rail (1) is formed between the limiting surface I (6) and the limiting surface II (14). Through the fastener, movement of the lateral bracket (3) in the vertical direction and the laying direction of the steel rail (1) can be effectively controlled, torsion of the lateral bracket (3) due to torsion of the steel rail (1) can be effectively controlled, the stability of the lateral bracket (3) structure is effectively enhanced, and the safety of a vehicle is ensured.

The invention discloses a construction method for drilling a depressurization hole in a gob-side mining roadway. The construction method comprises the main steps that (1), drilling sampling is conducted in a coal side where a haulage gate of a first coal mining face is not influenced by mining; (2), drilling sampling is conducted on the side, close to a coal mining face and away from a base plate by 1.5 m in height, of the next coal mining face gob-side mining roadway; (3) according to the two drilling sampling processes, the corresponding rule of the drilling depth and the pulverized coal quality value is found out, and the lateral bearing pressure distribution rule of the side, close to the coal mining face, of the gob-side mining roadway is obtained; (4), the stepped depressurization hole is drilled in an area from the front side of the coal mining face to a stopping line along the roadway by reference to the obtained lateral bearing pressure distribution rule; and (5), construction in the next coal mining face gob-side mining roadway is continuously conducted, and the construction steps are repeated till construction is completed. The construction method for drilling the depressurization hole in the gob-side mining roadway has the characteristics of being small in disturbance on the gob-side mining roadway, good in depressurization effect, small in construction difficulty, high in operability, short in construction period, low in construction cost and the like.

The invention relates to a construction process for a prestress support in a deep foundation pit. The construction process specifically comprises the following steps: (1) cleaning a site and constructing and paying off; (2) construction preparation; and (3) constructing enclosure engineering: a prestress is applied in an enclosure mode by means of triaxial stirring pile water sealing, a cast-in-situ bored pile, a biaxial stirring pile, a stiffening anchor rod pile, anchor spraying and a semi-detached waist rail, wherein the step (3) specifically comprises the following steps: sequentially joining and alternately performing triaxial stirring pile water sealing, cast-in-situ bored pile enclosing and biaxial stirring pile matched with earthwork excavation and transportation; firstly, performing construction of the cast-in-situ bored pile, wherein two stirring pile drivers move in opposite directions to reduce construction cold joints, and 3-5 days after construction of the biaxial stirring piles, following up and inputting the mixture into a drilling machine for performing construction of the cast-in-situ bored pile; after construction of the cast-in-situ bored pile, excavating earthwork, and then continuously excavating earthwork after constructing the stiffening anchor rod pile, and performing anchor spraying and the semi-detached waist rail; and repeating the construction flowsin the steps till integral construction of a to-be-constructed super deep foundation pit is finished. The construction process efficiency is high, the safety of the foundation pit is ensured, and theconstruction period is shortened.

The invention relates to a reverse towing device capable of reducing longitudinal deformation of soil when a box culvert is jacked in. The reverse towing device comprises a towing plate, a storage component inside a towing sleeve, an anchoring component outside the towing sleeve and an anti-drag pulley. The towing plate is of thin-plate coiled materials and pulled out from the front end of the box culvert when the box culvert is jacked in to separate the box culvert and soil layers. The storage component inside the towing sleeve is arranged in the box culvert and used for accommodating the towing plate and synchronously releasing the same when the box culvert is further jacked in. The anchoring component outside the towing sleeve is arranged in a box culvert starting well and used for fixing the outer end of the towing plate. By the anti-drag pulley which is arranged at the front end of a box body, sliding friction is replaced by rolling friction, thus the towing plate is low in frictional resistance when pulled out of the front end and is protected from damage caused by large local pressure of a bezel. Compared with the prior art, the reverse towing device is mainly applied to the top of the box culvert to be a substitute for a pipe curtain method and thixotropic mud, and is used for separating the soil and the box culvert so as to control disturbance to the soil and to avoid deformation of strata above the box culvert.

The invention discloses a ring-wave repeated drawing high deformation mold and technology for a plate. The mold comprises two ring-wave mold bodies including the ring-wave mold body A and the ring-wave mold body B, wherein the two ring-wave mold bodies are both of an axially-symmetrical cylindrical structure, the upper surfaces and the lower surfaces of the ring-wave mold bodies are each composedof a plurality rings of convex-concave continuous alternate matchable ring waves, the ring wave radian and length of the axial center are large, the wave height of the axial center is small, and the ring wave radian and length are decreased ring by ring and the wave height is increased ring by ring from the axial center to the exterior. Ring-wave upper mold bodies are movable mold bodies, ring-wave lower mold bodies are fixed mold bodies, and two groups of positioning mechanisms which are radially and symmetrically arranged are arranged at the upper end of each ring-wave lower mold body; and the plate is drawn to be in a set ring wave shape by the ring-wave upper mold bodies and the ring-wave lower mold bodies through mold closing. According to the technology, crystal grains of the plate can be repeatedly drawn, deformed and refined through the mold, and then the size of the crystal grains reaches the micron grade or the submicron grade. The ring-wave repeated drawing high deformationmold is not limited by the plate size, a large-size plate can be machined, and the comprehensive properties of the plate on the physical aspect, the chemical aspect, the mechanical aspect and the likecan be greatly improved.

The invention discloses a ZigBee-based tunnel automatic monitoring system and a monitoring method thereof. The system comprises an automatic data acquisition system, a wireless remote transmission system and a user service platform, wherein the automatic data acquisition system comprises a sensor, a data acquisition system and a short distance wireless transmitting and receiving device; the wireless remote transmission system comprises a base station, a remote wireless transmission device and a server; and the user service platform comprises treatment systems, such as a data analyzing and processing system, an intelligent early warning system and a management center. The monitoring system and monitoring method which are disclosed by the invention have the advantages that a wireless communication technology is adopted, fewer cables are used, damage caused by tunnel construction on the cables is avoided, a large-scale network is adopted for carrying out large-scale point distribution, and a tunnel structure can be monitored, early-warned and evaluated more detailedly and more accurately.

The invention relates to the technical field of carburizing and quenching as well as deformation control of steel work-pieces, and particularly relates to a simple method for deformation control during the carburizing and quenching of large-diameter heavy-duty gears. In the method, the deformation control can be carried out on the carburizing and quenching of the steel work-pieces by adopting simple facilities under simple operation conditions, so as to reach the expected effect and improve the product quality. The method comprises the following steps of: normalizing of steel work-piece, carburization of the steel work-pieces placed in a direction A, normalization of the steel work-pieces placed in a direction B, quenching of the steel work-pieces placed in the direction B in a static oil, and tempering. The method has the significances of breaking through the situation that the deformation control of the carburizing and quenching of the large-diameter complicated heavy-duty face gears can be controlled only by adopting complicated facilities and complicated technological operations, and simultaneously developing a simple and practical way for the deformation control during the carburizing and quenching of the large-diameter complicated heavy-duty face gears.

The invention provides a reinforced concrete inner support with pre-stressed loaders for supporting a foundation pit. The reinforced concrete inner support comprises reinforced concrete supporting beams and reinforced concrete enclosing purlins, which are arranged in the foundation pit, wherein a plurality of pre-stressed loaders are arranged between the reinforced concrete supporting beams and the reinforced concrete enclosing purlins. The inner support is high in supporting rigidity and controllable in foundation pit deformation. The prestress applied to the reinforced concrete support can be adjusted at any time when the soil pressure of the side wall of the foundation pit is changed, so that the soil pressure of the side wall of the foundation pit is counteracted.

The invention relates to a concrete support and fish-belly sill combined supporting system of a special-shaped foundation pit. The system comprises concrete supports, assembled fish-belly sills, section steel diagonal supports, corner supports and middle stand columns, wherein the first pass and the third pass of supports of the foundation pit adopt the concrete supports, and the second pass and the fourth pass of supports adopt the fish-belly sill supports; and the concrete supports and the fish-belly sill supports are vertically connected through steel stand columns in the foundation pit to form a space system. The invention additionally discloses a construction method for the concrete support and fish-belly sill combined supporting system of the special-shaped foundation pit. The construction method comprises the steps of constructing the first pass of concrete supports, roadway slabs and trestle slabs after foundation pit enclosure and stand column piling are completed; after the strength meets the requirement, downwards excavating the foundation pit to the position of the second pass of supports, i.e. the fish-belly sill supports, sequentially installing corbels, brackets, purlins, the corner supports and the fish-belly sills, and finally installing the diagonal supports. The concrete support and fish-belly sill combined supporting system of the special-shaped foundation pit and the construction method provided by the invention have the advantages that the foundation pit is ensured to be safely and quickly constructed; a larger operating space can provided, the speed of installing and removing the supports is fast and the deformation control of the foundation pit is facilitated.

The invention discloses a ladder waveform steel plate and steel truss combined assembled envelop enclosure structure and a construction method thereof, relates to the technical field of foundation pitengineering, and solves the problems of low rigidity, high environmental influence, difficult quality control and incapability of recycling in a traditional foundation pit envelop enclosure structure. The assembled envelop enclosure structure is formed by continuously assembling multiple envelop enclosure structure units arranged along the edge lengths of a foundation pit; each envelop enclosurestructure unit comprises two ladder waveform steel plates, multiple steel trusses connected between the two ladder waveform steel plates n the height directions, and multiple connecting rods connectedbetween the ladder waveform steel plates and the steel trusses; the ends of the two adjacent ladder waveform steel plates are joined or engaged; and the steel trusses are of plane truss structures consisting of two parallel chord rods and multiple web rods connected between the two chord rods. The envelop enclosure structure units are inserted in a unit overall manner or a component insertion manner; and the adjacent envelop enclosure structure units are in joined or engaged connection to form the continuously complete assembled envelop enclosure structure capable of retaining soil and stopping water at the same time.