25results about How to "Long construction period" patented technology

The invention discloses a construction method for excavating and protecting a slope with a dangerous terrain and poor self-stability by utilizing a step-by-step layering method, which comprises the following steps of: excavating each stage of slope according to a design drawing in a layered manner according to protection, excavating and protecting from top to bottom, and taking the excavated bottom surface of each layer as a protection construction platform, so as to realize full-mechanical construction; erecting of a scaffold and a down-the-hole drill platform is omitted, and a crawler-type down-the-hole drill is adopted for drilling to avoid aloft work; and in the drilling process, lower-layer redundant soil and stone cleaning, anchor cable manufacturing, anchor cable mounting, frame beam pouring, grouting and other construction operations are synchronously carried out. According to the step-by-step layered excavation mode, the actual unprotected height of slope excavation is reduced, one layer of slope excavation is protected one layer of slope excavation, rapid construction is achieved, economy is achieved, and safety is guaranteed.

The present application relates to the technical field of deep foundation pit construction, and provides a reverse construction method for a deep foundation pit basement, including: constructing supporting piles around a deep foundation pit to be excavated; excavating earthwork in the enclosed area of ​​the supporting piles to the design elevation of a reserved earth platform; continuing to excavate earthwork outside the area of ​​the reserved earth platform to the design elevation of the basement, and constructing pile foundations within the area of ​​the reserved earth platform; constructing structural columns of the basement on the pile foundation; excavating the earthwork between the structural columns of the reserved earth platform and the main structure of the basement, and constructing the main structure, and connecting the main structure to the structural columns. The reserved earth platform is adopted to realize the counter-pressure effect on the supporting piles, replacing the existing anchor cable support structure, without drilling holes on the walls around the foundation pit and threading anchor cables, effectively meeting the application of deep foundation pit excavation construction scenarios such as those near subways, developed groundwater systems, many surrounding buildings, complex surrounding underground pipe networks, or small construction land areas.

The invention discloses an oyster shell processing device and a process thereof, comprising a storage box, a chamber, a closed tank, an upper feeding rack, a lower discharging barrel, and also comprising: a partitioned storage structure, wherein the left end of the outer side of the storage box forms a feeding gap with the closed tank, and the right end of the outer side of the storage box forms a discharging gap with the closed tank, and both ends of the chamber are open, the partitioned storage structure comprises a multi-stage feeding assembly arranged at the left end of the chamber, and a closed assembly is arranged at the right end of the chamber; an inner cavity temperature storage structure, comprising a truss arranged at the top of the inner part of the chamber, a suction pump is fixed on the left side of the truss, the suction pump is connected to an air storage bag through a connecting pipe, the air storage bag is fixed to the lower end of the truss, and the suction pump is electrically connected to the multi-stage feeding assembly. The invention can not only effectively store oyster powder of different temperatures in layers, but also can retain hot air or cold air in different chambers as much as possible.

The present invention relates to the technical field of tunnel construction, and provides a construction method for the expansion and reconstruction of a single-sided widening of an existing tunnel. The starting section of the existing tunnel for expansion and reconstruction is determined according to lining detection information and surrounding rock survey information. The starting section is located in the middle section of the existing tunnel. The starting section is expanded and reconstructed, and then the expanded and reconstructed starting section is used to perform advance support on adjacent tunnel sections in the first direction, and the expanded and reconstructed starting section is used to perform advance support on adjacent tunnel sections in the second direction. The remaining tunnel sections in the first direction are expanded and the remaining tunnel sections in the second direction are expanded to complete the expansion and reconstruction of the existing tunnel. The present application sets the starting section in the middle section to solve the problem of limited construction surface, and can carry out synchronous construction from both ends of the starting section. It can increase multiple construction surfaces according to the construction period requirements, and can also reduce the disturbance of the surrounding rock, reduce the engineering risk, and shorten the construction period.

The application discloses a tunnel plug construction method and a tunnel plug structure, and the method comprises the following steps: S1, drilling holes along the circumferential direction of the inner wall of the tunnel in the plug area to form grouting holes, and grouting the grouting holes; S2, roughening the inner wall of the tunnel in the plug area; S3, installing an exhaust part, a grouting pipeline and a water stop part on the inner wall of the tunnel, the exhaust part is attached to the inner wall of the tunnel and forms an exhaust passage; S4, pouring concrete in the plug area to form a concrete plug block, the concrete plug block gradually cools and shrinks inward; and S5, grouting the joint between the concrete plug block and the inner wall of the tunnel by using the grouting pipeline. The inherent characteristics of the cooling and shrinkage of the concrete plug block are utilized, so that when the plug block shrinks, the exhaust part is driven to naturally separate from at least one side of the inner wall of the tunnel to form an air passage gap, and the air in the joint during the grouting process can be introduced into the exhaust passage in a directional manner through the air passage gap and smoothly discharged.

The invention discloses a construction method for removing bracket concrete through high-pressure water jet. The construction method comprises the following steps that S1, construction preparation is made; s2, completing installation and construction of the high-pressure water jet system; s3, parameters of the high-pressure water jet system are set; s4, starting to carry out experimental breaking; and S5, starting formal breaking. The concrete is of a microporous structure, the ultimate strength of the concrete is far smaller than the compressive strength of the concrete when the concrete bears tensile stress, the reinforcing steel bars have the characteristics of high tensile strength, dense surfaces of the reinforcing steel bars, no micropores and incapability of drilling in high-pressure water, so that high-pressure water flow is injected into the surface of the concrete, and when the high-pressure water flow penetrates through concrete pores, internal pressure is generated; when the internal pressure exceeds the tensile resistance of the concrete, the concrete is broken and separated, and the internal reinforcing steel bars are not damaged, so that the aims of protecting the reinforcing steel bars from being damaged due to the removal of the concrete and completely removing the concrete are fulfilled, and the construction quality is effectively ensured.

The application provides a self-cleaning water-based outer wall waterproof paint, which comprises the following components in mass fraction: 18-30% of a silicone-acrylate emulsion, 10-25% of a silicone resin emulsion, 5-15% of modified titanium dioxide, 5-15% of rutile titanium dioxide, 5-8% of super-hydrophobic talcum powder, 5-15% of heavy calcium carbonate, 3.3-6.1% of an additive, and the balance of water. Due to the good long-term hydrophobicity of the silicon compound in the emulsion molecular structure, the water molecules are prevented from penetrating into the paint film, and the long-chain alkyl of dodecyloxybenzoic acid increases the hydrophobicity of the titanium dioxide, so that good waterproof effect is achieved, the paint film is thicker and denser, the waterproof effect is better, the outer wall coating is fresh for a long time due to the lotus effect formed on the surface of the paint film, and the outer wall coating has strong hydrophobicity. Meanwhile, the application also has the advantages of simple construction, short construction period and low construction cost, and can be widely used for the decoration of surface coatings.

The invention provides a construction method for manufacturing and connecting fabricated concrete members, which comprises the following steps of: at the joint of a foundation member and a newly-added member, adopting reinforcing measures for steel bar connection, adopting welding connection, and adopting grouting material filling connection for concrete. The method has the advantages of shortening the construction period, saving the construction cost and improving the connection strength of the prefabricated parts.

The utility model discloses a steel-concrete combined cantilever pouring concrete bridge deck slab supporting structure which comprises an external supporting assembly and an internal supporting assembly which are used for supporting a concrete pouring bridge deck slab, and the external supporting assembly comprises a steel beam steel top plate arranged at the top of a box beam and a bottom die steel plate connected with the steel beam steel top plate. Bottom die steel plates are arranged on the two sides of the steel beam steel top plate, side die steel plates are connected to the cantilever ends of the two sides of each bottom die steel plate, end dies are connected to the two longitudinal ends of each bottom die steel plate, and a plurality of stiffening ribs are arranged at the bottoms of the steel beam steel top plate and the bottom die steel plates in the bridge direction. The internal supporting assembly comprises a plurality of tensile steel bars arranged in the bridge direction, one ends of the tensile steel bars are connected with the cantilever ends of one sides of the bottom die steel plates, the other ends of the tensile steel bars are connected with the cantilever ends of the other sides of the bottom die steel plates, and the two ends of the tensile steel bars are connected with the side die steel plates on the corresponding sides through connecting steel bars. According to the technical scheme, the construction steps of the bridge deck slab can be simplified, and the construction period is shortened.

The utility model belongs to the field of purline connection, and particularly relates to an assembly type purline connection structure which comprises a truss upper rod, a hot galvanizing angle steel purlin support is arranged at the top of the truss upper rod, a purline body is arranged on one side of the hot galvanizing angle steel purlin support, and a hot galvanizing U-shaped bolt is movably inserted into an inner cavity of the hot galvanizing angle steel purlin support. According to the utility model, the hot galvanizing U-shaped bolt is connected to the inner part of the hot galvanizing angle steel purlin holder and the surface of the upper rod of the truss, and the hot galvanizing U-shaped bolt is stably connected to the outer side of the upper rod of the truss through the hot galvanizing bolt connecting base plate and the hot galvanizing nut; according to the invention, stable installation of the hot galvanizing angle steel purlin holder and the purlin body is realized, the installation efficiency can be improved when the purlin body is installed, the installation can be simple and convenient enough, meanwhile, an anti-corrosion layer coated on the surface of a rod on a truss is not easily influenced, and the workload of workers can be reduced.

The application discloses a method for dividing the end resistance and side friction of a pile foundation in a piling process based on piling records, and the method comprises the following steps: obtaining a curve of the hammering number changing with the depth in the piling process according to the field piling records; obtaining a curve of the relationship between the hammering number and the soil resistance; obtaining a curve of the soil resistance changing with the depth in the piling process by using the two curves; determining the upper and lower envelope lines of the curve of the soil resistance changing with the depth; drawing a straight line through the (0, 0) point and the lowest point of the lower envelope line; obtaining the curve of the soil resistance changing with the depth after eliminating the linear part by subtracting the straight line part from the curve of the soil resistance changing with the depth, and determining the new lower envelope line; fitting the side friction in the piling process by drawing a straight line through the original point, the lowest point and the final point of the new lower envelope line; and obtaining the end resistance of the pile foundation in the piling process by subtracting the side friction from the curve of the soil resistance changing with the depth. The end resistance and the side friction of the pile foundation can be conveniently obtained, and the calculation precision of the pile foundation drivability analysis is improved.

The present invention provides a circular steel tube concrete combined wind turbine tower structure, the tower structure includes an upper steel tower and a lower steel tube concrete tower, the steel tube concrete tower is composed of multiple circular steel tube concrete tower sections; the steel tube concrete tower section includes an inner and outer double-layer steel tube, the inner and outer steel tubes are connected at the upper and lower ends of the tower section, a grouting space is formed between the two, and concrete is poured and filled. The present invention meets the requirements of high-altitude and large-scale wind turbines, the total height of the upper steel tower and the lower steel tube concrete tower can reach no less than 150m, and it is easy to manufacture, transport and install, can be reused, and reduces costs.

This invention relates to a rebar construction device for rapid turnover of precast box girder formwork, belonging to the field of precast box girder construction technology. It includes a main body and connecting rods (8) spaced apart. The main body comprises a base (1), columns (2), telescopic devices (5), and support rods (3). The columns (2) are positioned facing each other, with their lower ends hinged to the base (1), allowing the columns (2) to rotate inwards. The support rods (3) are spaced apart on the inner sidewalls of the columns (2) and facing each other. The upper ends of the columns (2) are connected via the telescopic devices (5), and adjacent columns (2) are connected as a whole via the connecting rods (8). This device does not occupy the bottom formwork (12). Rebar (13) is tied first, and after completion, the bottom formwork (12) is inserted, the telescopic devices (5) are retracted, and the rebar cage is positioned. The device's side formwork is then removed for installation. This solves the problem of existing methods where the bottom formwork is laid first and then the rebar is tied, resulting in the formwork being idle during the rebar tying construction period, and the difficulty of rebar tying without a platform.

This utility model discloses an adjustable hydraulic slope protection net, relating to the field of hydraulic construction technology. Its key technical features include: a foldable protective net panel with support mechanisms on both sides; each support mechanism includes a column, the side of which is hinged to the edge of the protective net panel; a weighted base fixedly mounted at the bottom of the column; a rotating block rotatably connected to the top of the column via a pivot; a limiting plate fixedly mounted on one side of the rotating block; a limiting space between the limiting plate and the rotating block, which is adapted to the limiting plate; and two support mechanisms that can be interlocked via the limiting plate. A limiting component is provided on the side of the rotating block away from the limiting plate to restrict its rotation. This utility model is easy to assemble and disassemble, improving assembly and disassembly efficiency.

The present invention discloses an industrial waste heat power generation system and method, which is applicable to various industrial fields, especially to the heat energy recovery, conversion and utilization system of low-grade heat in coal-fired power plants / thermal power plants and gas-fired power plants. There are a large number of low-grade heat sources in the system. The present invention utilizes the calorific value of the low-grade heat source to heat the ambient air in one or a group of wind energy towers, so that the internal energy of the air increases due to the heat. When the air with increased internal energy is discharged from the wind energy tower, it drives the rotating impeller to convert the internal energy of the air into mechanical kinetic energy. The rotating impeller drives the wind turbine to generate electricity, thereby converting the mechanical energy into electrical energy.

A retractable and recyclable octagonal cone head device for static pressure discharge of biogas comprises an outer tube sleeve, an inner core cone, a No. 1 pipe segment, a No. 2 pipe segment, an upper expansion piece and a lower expansion piece, the upper part of the outer tube sleeve is fixedly connected to the lower end of the probe rod, the lower part of the outer tube sleeve is connected to the inner end of the No. 1 pipe segment through a right-angle lock, the upper part of the inner core cone extends into the inner cavity of the outer tube sleeve, the upper end of the inner core cone barrel is inserted into the U-shaped buckle on the inner wall of the outer tube sleeve, the lower end of the inner core cone barrel is a cone tip, the outer wall of the inner core cone barrel above the cone tip is connected to the lower end of the No. 2 pipe segment through a half-angle lock, the outer end of the No. 1 pipe segment and the upper end of the No. 2 pipe segment are both connected to a fixing member, the upper expansion piece is installed in the upper expansion slot of the No. 1 pipe segment, and the lower expansion piece is installed in the lower expansion slot of the No. 2 pipe segment. And an operation method of a retractable and recyclable octagonal cone head device for static pressure discharge of biogas is provided. The invention has the advantages of short construction period, convenient operation, low cost and good subsequent exhaust effect.

The utility model discloses a welding tool special for a shell, relates to the technical field of shell machining, and can solve the problems that in the prior art, an existing manufacturing process is inconvenient, the welding efficiency is low, the percent of pass is low, and the input human resource cost is high. A plurality of special welding tools are installed on the outer wall of the shell, the convex lugs can be completely attached to the shell flatly, then welding work is carried out, the multiple welding tools installed on the outer wall of the shell are distributed in a circumferential array mode, and the included angles between every two welding tools are the same in degree. By means of the installation mode, the convex lugs can be stably attached to the outer wall of the shell in a flat mode, force borne by all parts of the outer wall of the shell can be dispersed through the uniform installation mode, it is guaranteed that welding openings of the convex lugs are not prone to falling off during welding work, then the welding period is shortened, and the welding efficiency is improved.

The present invention provides a side wall construction method for a cap pit, the method comprising: S1, excavating a cap pit at a preset position to a preset depth; S2, leveling the bottom, side walls, and bottom plate of the cap pit; S3, pouring a cap concrete cushion layer at the bottom of the cap pit; S4, after the strength of the cap concrete cushion layer meets the requirements, setting a side wall template on the side wall of the cap pit, and a pouring gap is reserved between the two, and the top of the side wall template is higher than the height of the bottom plate concrete cushion layer; S5, pouring the bottom plate concrete cushion layer, and pouring the reserved pouring gap in step S4 at the same time. By setting a side wall template in the cap pit after pouring the cap concrete cushion layer, the cap pit side wall and the basement bottom plate concrete cushion layer can be cast and formed at the same time, which can effectively solve the problems caused by using brick formwork or ordinary wooden formwork, such as extended construction period, high labor cost, and inconvenience in subsequent demoulding. This method not only improves construction efficiency, but also reduces construction costs.

The invention discloses a single-radial-plate radial ventilation rotor support, and relates to the technical field of rotor supports. To solve the problem; the rotor support specifically comprises a center body, radial plates, rib plates, magnet yoke rings and magnetic poles, the center body is located in the center of the whole rotor support, one end of the center body is fixed to a rotating shaft in a key connection mode, and the other end of the center body is connected with an output component; the radial plates are radially arranged on the outer side of the center body and the inner sides of the rib plates and are annularly distributed along the center body; the rib plates are arranged between the radial plate and the magnet yoke ring, the number of the rib plates is multiple, and the multiple rib plates are arranged on the upstream side and the downstream side of the radial plate; the magnetic yoke ring is welded on the outer side of the rib plate; and the magnetic poles are fixed on the magnet yoke rings and are detachably connected. The invention has the advantages of low material cost, low processing cost, short installation period, saved construction period and convenient installation.

The present invention discloses a process for optimizing converter steelmaking by utilizing ironmaking gas ash, and involves three process contents: resource utilization technology of ironmaking gas ash and steel slag fine powder, and optimization of converter smelting process. The present invention utilizes ironmaking gas ash and steel slag fine powder as flux materials for converter after adding certain active materials. While utilizing ironmaking gas ash as resources, it plays the role of assisting melting slag in the early stage of converter blowing, suppressing slag splashing and metal splashing accidents in the early stage of converter smelting, and realizing the process purpose of recycling and resource utilization of solid waste within steel enterprises, with huge economic and environmental benefits.

The invention discloses a dual-optical-port transceiver device and a use method thereof. The optical device comprises a laser TO-CAN, a detector TO-CAN, a metal shell, a combined mirror bracket, a filter and two paths of independent adapters. Compared with the prior art, the device has the positive effects that light is transmitted in two paths of adapters of the device by utilizing a filter reflection technology, so that modules can be connected in series, and data transmission between a BBU machine room and an RRU machine room is realized only through one long-distance transmission optical fiber. Existing terminal network equipment can be utilized in the BBU and RRU machine rooms, a maintenance interface and a maintenance mode do not need to be changed, fault points are not increased, the transmission bandwidth is not changed, the fiber core cost is reduced, upgrading of a BBU centralized networking mode is achieved, and a very simple network is built.

The present application relates to the field of building technology, especially to a MICP-bionic structure sandwich reinforcement method for coral sand soil body, which comprises the following steps: S1, grading the undisturbed coral sand, using fine particles as sandwich material and using medium and coarse particles as main filling material; S2, laying 3D printed bionic geosynthetic material in the fine particles, sequentially injecting Paenibacillus pasteuria bacterial liquid and urea-calcium chloride cementing liquid, and alternately grouting multiple times after standing; S3, layering and stacking and compacting the composite sandwich and the main sand layer to build a layered composite structure; S4, repeating steps S1-S3. The present application combines ecological reinforcement technology with reinforcement technology to build a collaborative system of "layered construction-sandwich construction-whole reinforcement", which effectively improves the reinforcement effect and efficiency.

The invention relates to the technical field of tunnel lining concrete and underground engineering, and provides a decision-making method and system for the reasonable formwork removal opportunity of tunnel secondary lining concrete.The method comprises the steps that mechanical parameters of the lining concrete are obtained; establishing a load-structure numerical calculation model, inputting the mechanical parameters of the lining concrete into the numerical calculation model, and performing trial loading on the numerical calculation model to obtain the ultimate bearing capacity of the lining concrete at different curing ages; determining a first lining concrete safety coefficient of the lining concrete at different curing ages; determining a second lining concrete safety coefficient of the lining concrete according to the safety critical value of the lining concrete; the first lining concrete safety coefficient and the second lining concrete safety coefficient are compared, and the reasonable formwork removal opportunity range of the lining is determined according to the comparison result; and according to the reasonable lining formwork removal opportunity range and the lining temperature drop range, the lining formwork removal opportunity is determined. The form removal time determined by the method is high in accuracy, high in safety and high in applicability.

The utility model discloses a steel pipe and flat steel bending device which comprises a roller and a roller frame, the roller is movably arranged on the roller frame, a connecting piece is arranged on the roller, a stress application rod is connected to the side, away from the roller, of the connecting piece, a limiting piece is further arranged on the roller, and the limiting piece and the connecting piece are oppositely arranged. A gap for the flat steel or the steel pipe to penetrate through is reserved between the limiting piece and the rolling wheel, the rolling wheel is provided with an outer edge part and an inner edge part, the inner edge part is used for bending the flat steel, and the outer edge part is used for bending the steel pipe. According to the bending device, the rolling wheel with the outer edge part and the inner edge part and the limiting piece are arranged, the flat steel penetrates through the gap so that the flat steel can be located in the inner edge part, or the steel pipe penetrates through the gap so that the steel pipe can be located in the outer edge part, the stress application rod is rotated so that the rolling wheel can rotate, and therefore the flat steel or the steel pipe can be bent, and compared with a finished product purchasing mode, cost is reduced; and the bending machining efficiency is improved, and the construction period is prevented from being prolonged.

The invention relates to the technical field of cylinder cover conduit hole machining, in particular to a conduit hole out-of-tolerance processing method. The guide pipe hole out-of-tolerance treatment method comprises the following steps that S1, a guide sleeve is inspected, if the inner wall of the guide sleeve is abraded, the guide sleeve is replaced, then inspection is stopped, and a workpiece is started to be machined; otherwise, carrying out the next inspection; and S2, other parts, except for the gun drill, of the machining machine tool are inspected, corresponding parts are replaced or adjusted, inspection is stopped after the machining requirement is met, and workpiece machining is started. The guide sleeve has the greatest influence on the position precision of the reamer head of the reamer, so that the inner wall of the guide sleeve is firstly checked, namely, the maximum factor causing out-of-tolerance is firstly checked, and if the guide sleeve is abraded and is replaced in time, the factor causing out-of-tolerance with the greatest possibility is eliminated to a certain extent, so that the service life of the reamer is prolonged, and the service life of the reamer is prolonged. And the construction period can be prevented from being prolonged.