31results about How to "Reduce large deformation" patented technology

The invention provides an anti-scour method for widening and narrowing roadway development in rock burst coal seams, which includes increasing the designed width of the original roadway design by increasing the preset value to obtain the planned width of the roadway, and reducing the designed width of the original coal pillar between roadways to the preset value. Sets the value width. The excavation plan develops the first wide excavation roadway with the width of the roadway, and constructs the first filling body with a preset numerical width on either side of the first wide excavation roadway. Excavating a roadway with the second widest width along the first filling body, and constructing a second filling body on the side adjacent to the first filling body in the second widening development roadway. Excavate along the first wide excavation roadway away from the side of the first filling body or the second wide excavation development roadway on the side away from the second filling body and excavate the third wide excavation roadway and leave a lane with a width of a preset value between the development roadways For small coal pillars, the third filling body is constructed on the side of the small coal pillars adjacent to the roadway in the third wide excavation roadway. Thereby reducing the supporting pressure of the coal pillars in the roadway developed by the rock burst coal seam.

The invention relates to an auxiliary positioning device for railway vehicle air conditioner installation. The device comprises a vehicle body, a moving mechanism and a clamping mechanism, wherein theclamping mechanism is installed at an upper end of the vehicle body in a sliding fit mode, and a placing mechanism is arranged at an upper end of the clamping mechanism. The device is advantaged in that rail vehicle air conditioner installation is conducted by adopting the design concept that an air conditioner continuous supply and a transportation installation structure can be rapidly achieved,in the whole process, air conditioners do not need to be manually lifted to an upper end of the vehicle body one by one, then working efficiency is greatly improved, labor intensity of workers is reduced, moreover, multiple mechanisms with the clamping and limiting effects are adopted to improve the stability degree in the air conditioner transportation and installation process, and then one-timeinstallation accuracy of air conditioner installation is improved.

The invention relates to the field of tunnel support, in particular to a construction method suitable for a soft rock bedding tunnel, which comprises the following steps: S1, excavating reverse-tilting upper step core soil, and constructing a first support system; S2, excavating core soil of the lower step of the reverse side, and constructing a second supporting system; S3, excavating upper stepcore soil along the inclined side, and constructing a third support system; S4, excavating core soil of the lower step along the inclined side, and constructing a fourth support system; and S5, disassembling the temporary support, and constructing a secondary lining. According to the construction method, reasonable excavation steps and supporting structures are adopted in a targeted mode accordingto the bias deformation characteristic of the bedding tunnel and the surrounding rock stability difference, deformation during tunnel construction can be effectively controlled, surrounding rock self-bearing is given to full play, the surrounding rock stability is improved, and therefore the construction risk and the engineering cost are reduced.

The invention discloses a pressure-relief support coordination control method for a deep high-stress tunnel based on borehole pressure relief. The method comprises three steps according to a time sequence, and the three steps are respectively a primary pressure relief support step, a borehole pressure relief step and a secondary high-strength anchor grouting support step. According to the pressure-relief support coordination control method for the deep high-stress tunnel based on borehole pressure relief, surrounding rock deformation in each stage is controlled by adopting different support and reinforcement methods according to difference of surrounding rock deformation ways in different stages after the tunnel is excavated, the support performances of surrounding rocks and supporting structures are fully played, and large deformation of the surrounding rocks of a deep high-stress tunnel is reduced, so the stability of the tunnel can be maintained for a long time. Meanwhile, the method disclosed by the invention is capable of effectively reducing the repair rate of the tunnel, alleviating the labor intensity of workers and lowering the comprehensive support cost of a mine.

The invention discloses a roller compacted concrete structure in which composite slurry material is injected into gravel material. It is composed of multi-layer composite slurry roller compacted concrete layer. The composite slurry roller compacted concrete layer is formed by vibration rolling of gravel material and surface poured composite slurry. The gravel material is excavation material with a particle size greater than or equal to 5mm. The gravel material is piled up in layers on the dam foundation, and the composite slurry is poured on the layered gravel material and randomly filled with gravel material. When the liquid level of the composite slurry is close to the top surface of the gravel material, the surface of the storehouse is compacted by vibrating rollers. A grouted roller compacted concrete structure with a uniform and stable structure is formed. The invention has the advantages of local materials, uniform and stable structure, excellent performance, fast construction speed and saving engineering cost. The invention also discloses a construction method of the roller compacted concrete structure in which the composite slurry material is injected into the stone slag material.

The invention relates to a manufacturing method of tea packaging cans, which uses a tea packaging can manufacturing device, which includes a gantry frame, a workbench, an auxiliary device and a side device, the lower part of the gantry frame There is a workbench on the side, the upper end of the workbench is equidistantly installed with an auxiliary device from left to right, the left side of the auxiliary device is provided with an edge device, and the lower end of the edge device and the upper end of the workbench are in a sliding fit , the upper end of the edge-lapping device is connected with the upper end of the gantry frame through a sliding fit. A method for manufacturing tea packaging cans according to the present invention. Improve the stability of the edge forming process, thereby improving the forming accuracy of the iron sheet tank body. The iron sheet pre-bending, integral reel edge forming and edge sealing treatment can be continuously operated on the same working line, which improves work efficiency.

The invention relates to stator bolts for eliminating exciter stator deformation and an application method of stator bolts, which relate to the technology of exciter stator manufacturing, and solve the problem that the existing stator is easy to deform. The stator bolts are reamed hole bolts, wherein a screw rod reamed shaft is formed by a plurality of subsections; the sections have the same structure and respectively comprise a reamed shaft section and a chamfering-shaped shaft section; each reamed shaft section is the shaft section matched with the dimension of an iron core bolt hole and makes contact with the stator iron core bolt hole; the diameter of the top part of each chamfering-shaped shaft section is matched with the diameter of the reamed shaft section, and each chamfering-shaped shaft section is inclined downwards according to a chamfer alpha so as to be in a turbination shape from the top part, is not in contact with the stator iron core bolt hole, and has the length smaller than the length of the reamed shaft section. According to the stator bolt for eliminating exciter stator deformation and the application method of the stator bolts, the traditional manufacturing manner of the exciter stator is improved, the four reamed hole bolts on four corners of the iron core of the stator adopt the structure with same opposite angles and different adjacent angles, the occurrence of the phenomenon of large deformation due to large clearance between the stator iron core and the bolt holes is reduced, the precision error after the stator iron core is finished is reduced, and the product quality is improved.

The invention discloses a method for controlling roadway surrounding rock deformation under the condition of opposite stoping and tunnelling of close-range coal seams, and the method is used for the field of mining-induced stress control methods for opposite stoping and tunnelling of the close-range coal seams. The mining-induced stress control methods corresponding to three types of conditions include: the mining-induced stress control method for opposite stoping and tunnelling of the corresponding coal seam, the mining-induced stress control method for lower stoping and upper tunnelling of the adjacent coal seam, and the mining-induced stress control method for upper stoping and lower tunnelling of the adjacent coal seam. The technical problems of roadway large deformation, low roadway support efficiency and high support cost under the influences of stoping are effectively solved; and it can be seen that the roadway large deformation phenomenon is reduced by 70%, the support efficiency is improved by 20%, and compared with the prior art, the support cost is lowered to 60%.

The invention relates to the technical field of tunnel construction, in particular relates to a support frame, a support structure and a construction method of the support structure, and provides a support frame which is formed by sequentially connecting a plurality of support segments in cycle, wherein hole grooves are formed in two ends of each support segment; adjacent support segments are connected through a first sleeve; the first sleeve is a hollow circumferential sleeve which is matched with the support segments in size; mounting holes are formed in two ends of the front wall surface and the rear wall surface of the first sleeve corresponding to the hole grooves; a second sleeve is a cross-shaped sleeve which comprises the circumferential sleeve similar to the first sleeve and two longitudinal sleeves which are symmetrically arranged at the centers of the front side wall and the rear side wall of the circumferential sleeve; energy-dissipation presplitting slots are formed in the middle parts of two ends of the left wall surface and the right wall surface of the circumferential sleeve. The support structure formed by combining the first sleeve and the second sleeve is reasonable in design and convenient to construct, and can effectively adapt to large deformation of a surrounding rock; the clearance-intrusion risk of the local large deformation of a tunnel is reduced; the overall stability of a primary lining support structure is improved; and the subsequent treatment cost of the engineering is reduced.

The invention discloses a shock absorption rubber air spring used for a vehicle. The shock absorption rubber air spring comprises a bladder type main body, an upper shock absorption part and a lower shock absorption part. The upper shock absorption part and the lower shock absorption part are connected with the two ends of the bladder type main body respectively. In addition, the upper shock absorption part comprises an upper shock absorption pillar and a buffer part. The shock absorption pillar is fixedly connected with the top of the buffer part, and the buffer part is in the shape of a bottle without bottoms at the two ends. The upper end of the buffer part is connected with the bottom of the shock absorption pillar. The lower end of the buffer part is inserted into the bladder type main body. The upper shock absorption part is made of vulcanite. The buffer part of the upper shock absorption part further comprises a conical transition part, an annular connection part and an insertion part. The conical transition part is connected with the shock absorption pillar. The insertion part is inserted into the bladder type main body. The annular connection part is located between the conical transition part and the insertion part. According to the shock absorption rubber air spring, the phenomena of the short service life and partial heating of the rubber air spring caused by excessive deformation and overstrain of a rubber airbag due to frequent use in the using process are avoided, so that the service life of the rubber air spring is prolonged, and the quality of the rubber air spring is improved.

The invention relates to a traffic tunnel surrounding rock collaborative control system and a construction method, comprising a quick-setting slurry layer that can be sequentially arranged along the inner wall of the tunnel to the direction of the inner space of the tunnel, a flexible explosion-proof energy-absorbing layer, a rigid guard plate layer and a steel arch frame, A plurality of telescopic parts are arranged between the flexible explosion-proof energy-absorbing layer and the rigid guard plate layer, and the gap between the flexible explosion-proof energy-absorbing layer and the rigid guard plate layer is filled with flexible materials; the flexible explosion-proof energy-absorbing layer can pass through anchors It is fixedly connected with the surrounding rock, and the anchor piece can be inserted into the surrounding rock. The support structure of the present invention can effectively prevent and control the large deformation of the surrounding rock faced by the traffic tunnel.

The invention relates to an auxiliary positioning device for railway vehicle air conditioner installation. The device comprises a vehicle body, a moving mechanism and a clamping mechanism, wherein theclamping mechanism is installed at an upper end of the vehicle body in a sliding fit mode, and a placing mechanism is arranged at an upper end of the clamping mechanism. The device is advantaged in that rail vehicle air conditioner installation is conducted by adopting the design concept that an air conditioner continuous supply and a transportation installation structure can be rapidly achieved,in the whole process, air conditioners do not need to be manually lifted to an upper end of the vehicle body one by one, then working efficiency is greatly improved, labor intensity of workers is reduced, moreover, multiple mechanisms with the clamping and limiting effects are adopted to improve the stability degree in the air conditioner transportation and installation process, and then one-timeinstallation accuracy of air conditioner installation is improved.

The invention provides a super-high rockfill dam structure suitable for water conservancy and hydropower engineering and a construction method of the dam structure. According to a super-high rockfill dam, lower layer concrete with the slump constant ranging from 70 mm to 150 mm is cast on a treated dam foundation, before the lower layer concrete is initially set, dimension stone or cobbles with the particle diameter above 40 mm are selected for piling up middle-layer dimension stone, first-grading roller compacted concrete with the VC value ranging from 1 s to 5 s is cast on the middle-layer dimension stone, and finally, rolling is carried out until even bleeding appears in the surface; then, the steps are repeated, and a rolling dimension stone concrete base with the height ranging from 90 m to 110 m is formed; and a concrete panel of 200 m to 300 m is constructed on the base for piling up a dam body, and finally, a concrete seepage-proofing panel is casted on the upstream portion of the whole dam body. According to the structure, local excavated materials can be fully used, the aim that no abandoned materials exist is basically achieved, and the dam structure is energy-saving, environment-friendly, low in cost and good in whole performance, improves the work efficiency and shortens the construction period.