59results about How to "Reduce the risk of construction" patented technology

The invention discloses a non-in-situ prepressing method of a self-anchored type support frame and the self-anchored type support frame thereof. The method comprises the following steps: firstly, carrying out design of the self-anchored type support frame according to the self gravity of a structural object; processing and producing the self-anchored type support frame in a factory; distributing equipment such as the support frame, jacks and the like according to a non-in-situ prepressing distribution drawing of the self-anchored type support frame for carrying out non-in-situ prepressing in the factory; sequentially and progressively applying loads for carrying out prepressing; and observing the deformation quantity of the self-anchored type support frame and determining the pre-bulge degree of the support frame: determining the elasticity deformation quantity and the non-elasticity deformation of the self-anchored type support frame, simultaneously combining the support frame mechanics for calculating the obtained flexibility, and carrying out integral analysis to determine the pre-bulge degree of the self-anchored type support frame. The invention can effectively solve the prepresing problem in the high-pier large-tonnage structural object support frame construction, can also save the construction cost to a large degree on the premise of ensuring the engineering construction quality, can simultaneously shorten the structural object construction period, and can create good economic benefits.

The invention discloses self-compacting concrete for concrete repairing and a preparation method of the self-compacting concrete for concrete repairing. Per cubic meter of the concrete is prepared from 280-340kg of ordinary Portland cement, 30-40kg of quick-hardening sulfate aluminum cement, 120-150kg of slag powder, 30-40kg of an expanding agent, 25-35kg of a dry powder additive, 800-900kg of fine aggregate, 750-850kg of continuously graded aggregate, 6.0-8.5kg of a special polycarboxylate superplasticizer and 165-175kg of water. The self-compacting concrete for concrete repairing is preparedby well mixing of ordinary Portland cement, quick-hardening sulfate aluminum cement, slag powder, the expanding agent, the dry powder additive, fine aggregate and coarse aggregate according to a certain stirring process. The self-compacting concrete for concrete repairing is high in strength of bonding to old concrete, high in early strength, capable of slightly expanding and especially applicable to repairing of dense reinforcement cement concrete structures and CRTS III type slab ballastless track filling layers by self-compacting concrete filling layers.

The invention discloses an overhanging type movable blanking platform for construction technology. The overhanging type movable blanking platform structurally comprises protection baffle plates, a bearing frame, movable cross beams, pulleys, sliding rails, an automatic discharging device, a movable inclined plate, fixed cross beams, support upright posts, underboardings, reinforcement connecting rods and lateral protection plates, wherein the automatic discharging device comprises a fixed inner plate, a supporting point, a discharging plate, a lifting mechanism, a right-sided support plate, abalance mechanism, a fixed base, a power mechanism, a transmission mechanism and a fixed inner plate support rod. According to the overhanging type movable blanking platform for construction technology disclosed by the invention, the lifting mechanism, the balance mechanism, the power mechanism and the transmission mechanism are arranged in the automatic discharging device, and automatic discharging can be realized when cargoes are fallen into a bearing table, the problem of time consumption and labor consumption during manual transportation and blanking is solved, the construction difficultyis reduced, and the construction efficiency is improved.

The invention relates to a high-rise cantilever structure formwork erecting system and a construction method. The high-rise cantilever structure formwork erecting system is characterized in that an inclined strut pre-buried steel plate is pre-buried in a lower-layer shear wall, an inclined strut is installed on the inclined strut pre-buried steel plate, a cantilever I-shaped steel is installed ina reserved hole in the shear wall on the layer, and a cantilever area formwork support is arranged on the cantilever I-shaped steel in a supported mode. The invention further provides a construction method during horizontal pipeline wall penetrating. The construction method comprises the construction steps that (1) the inclined strut pre-buried steel plate is manufactured; (2) pre-buried parts arepre-buried; (3) the reserved hole is reserved; (4) a groove-shaped prefabricated base plate is mounted; (5) a pre-welding connection positioning rod is installed; (6) the cantilever I-shaped steel ismounted; (7) an I-shaped steel inclined support is mounted; (8) supports in a cantilever area and a non-cantilever area are erected; (9) installing and pre-pressing are carried out on formworks; (10)a cantilever structure is mounted to integrally form a reinforcement cage; (11) I-shaped steel wire ropes are pulled; and (12) the reserved hole is plugged. According to the high-rise cantilever structure formwork erecting system and the construction method, construction is convenient, the construction quality and the construction safety of a cantilever slab can be improved, and good economic andtechnical benefits are achieved.

The invention discloses the application of plain concrete columns to later-poured strip supporting and belongs to the technical field of construction. The application of the plain concrete columns to later-poured strip supporting sequentially includes the steps of selection of bellows, hole forming of beam base plates, mounting and reinforcing of the bellows, the pouring of plain concrete columns, removal of formwork supports, building of later-poured strip formwork supports and pouring of concrete and removal of the plain concrete columns. According to the application of the plain concrete columns to later-poured strip supporting, the formwork supports previously arranged in a full span mode can be replaced with the plain concrete columns, so that a lot of revolving materials such as steel tubes and fasteners are saved in the long wait in the construction of a main structure, a certain effect of the civilization construction in a construction site is obtained, the construction site after the completion of later-poured strip construction is cleaned, the risk of construction in the site is reduced for workers, the quality of later-poured strip construction is ensured, and a lot of benefits are achieved at the same time.

The invention provides a plant growth regulator and a preparation method and application thereof as well as a prevention and control method for tree obstacles of a power grid line gallery, and relatesto the technical field of plant growth regulators. The plant growth regulator is prepared by compounding uniconazole, paclobutrazol, chlormequat, maleic hydrazide, choline chloride, chitosan, ethephon, mepiquat chloride, 6-benzylaminopurine, brassinolide and diethylaminoethyl hexanoate, so that the aims of changing a high-coarse growth conversion relation of plants in various angles, acceleratingthe ripening and ageing of the plants and comprehensively realizing regulation and control of the plants are realized. According to the prevention and control method for the tree obstacles of the power grid line gallery, the plant growth regulator is applied and the growth height of gallery trees is reduced so that the aim of preventing and controlling the tree obstacles of the power grid line gallery is realized. According to the method provided by the invention, the problem in the prior art that a method for effectively controlling the growth of the trees on an overhead power transmission line gallery is lacked is alleviated, and the aims that an ecological landscape and benefits of forest farmers are not damaged and tree obstacle threats are not caused are realized.

The invention provides a mortise-tenon connection structure of fabricated beam-column joints. The connection mode comprehensively considers the connection between upper columns and lower columns and the connection between beams and columns. Reserved chase mortises are formed in the upper columns, the lower columns, cross beams and longitudinal beams. During construction, secondary joint pouring for fabricated wet process connection is avoided, and the use of bolts and welding joints for dry-type joint connection is avoided. During construction, a traditional method is changed, the beams and columns are spliced through the reserved tenons and chase mortises of the beams and the columns, and the structure is assembled and formed at a time by pouring fine stone concrete into small holes and other processes. The mechanical properties of the joints is ensured, at the same time, the environmental pollution caused by the secondary pouring is avoided, the construction efficiency is improved, and the mortise-tenon connection structure of the fabricated beam-column joints is quite suitable for the development prospects of the fabricated type.

The invention relates to a concrete thermal insulation cover for the winter construction of a pier column. The concrete thermal insulation cover is used for circumferentially wrapping the poured construction section of the pier column and has a rectangular shape; one side of the concrete thermal insulation cover, which is contacted with the pier column, is an inner side; the concrete thermal insulation cover consists of a plastic film layer, a first covering cloth layer, a rock wool layer and a second covering cloth layer from the inner side to the outer side in turn; rubber band bundles for hermetically tightening and winding the upper end and the lower end on the outer side of the poured construction section are respectively arranged at the upper end and the lower end of the rectangular concrete thermal insulation cover along the edge; a plurality of lifting holes are formed in the edge of the upper end of the concrete thermal insulation cover; and each lifting hole is connected with a template of a construction section which is to be poured and is positioned above the concrete thermal insulation cover through a connecting member. The concrete thermal insulation cover can meet the requirement on concrete thermal insulation during the winter construction of the pier column, an operation process can be simplified, manual high-altitude operation is avoided, construction difficulty and risk are reduced, and construction safety and convenience are achieved.

The invention provides a large-scale suspended box cofferdam location fair lead and a location method thereof, and the structure of the invention is a steering device and also a transition device of a fixed seat and a connection plate, wherein, one end of the steering device is connected with the fixed seat through a transverse axis pin; the other end of the steering device is connected with one end of the connection plate through a vertical axis pin; the other end of the connection plate utilizes a plurality of groups of axis pins to combine a traction box through which a fair lead traction rope can pass; the axis pin and a steel sleeve are the bearings of the traction box which is at the end of the connection plate. The location method is as follows: arranging a fixed seat on the outer wall of the suspended box cofferdam; connecting the fixed seat, the steering device and the connection plate through axis pins to form a complete tensile system which can rotate flexibly; installing the traction rope in place by the axis pin traction box after the installation of the fair lead; adjusting the suspended box cofferdam to a specified location and realizing precise location. The invention has the advantages of simple structure, convenient operation, definite stress and low cost which can be used for precise location of other large-scale steel structure devices on the water and on the land, thus having greater promotion value.

The invention discloses an anti-falling protection device capable of horizontally moving along with a worker in building construction. The anti-falling protection device structurally comprises a resetswitch, a rod penetrating device, a fixing ring, a nylon cord, an anti-falling device, a steel wire rope, a limiting device and a hook; the reset switch is installed at the upper end of the rod penetrating device, the rod penetrating device is connected with the anti-falling device through the nylon cord, the hook is installed below the anti-falling device, and the anti-falling device is connected with the hook through the steel wire rope. The anti-falling protection device has the beneficial effects that according to the characteristics that only horizontal separation can happen and verticalseparation cannot happen through an engaged plate, the anti-falling device penetrates a scaffold supporting rod, the condition that a constructor needs to separate the upper end of the anti-falling protection device from a scaffold in the horizontal moving process is avoided, the anti-falling protection device and the scaffold can be in the connected state all the time, the construction risks arereduced, and the safety of the constructor is protected.

The invention discloses a prefabricated foundation ring beam prefabrication method and a construction method of a storage tank using a prefabricated foundation ring beam. The preparation processes ofthe prefabricated foundation ring beam includes the steps that measuring and line laying are conducted, a prefabricated part bottom die is laid, a positioning stirrup is mounted, sealing dies at bothends of an anchored prefabricated part are mounted, a horizontal circumferential reinforcement bar in mounted, a vertical stirrup is bundled and fastened, an embedded piece is mounted, vertical steeldies are mounted on the inside and outside of the prefabricated part, concrete pouring is conducted, curing is conducted, and die removal is conducted. Construction processes of a tank body using theprefabricated foundation ring beam include the steps that engineering positioning and line laying are conducted, a ring wall prefabricated part is prefabricated, a foundation trench is excavated, a cushion layer is subjected to concrete pouring, the prefabricated ring wall and the prefabricated part are transported, the prefabricated ring wall and the prefabricated part are assembled and calibrated, the ring wall prefabricated part is in wet connection, graded sand and stone backfill of a tank core is conducted, sand cushion layer backfill is conducted, asphalt sand is laid, acceptance check is conducted. The standardization of production and the continuity of the construction processes can be realized, the quality of structures is improved, the construction period is shortened, the impacts of weather and labor on the construction quality are reduced, and pollution of on-site construction is reduced.

The invention discloses a rapid construction method and structure for a secant pile and steel jacket box combined cofferdam. The method comprises the following steps of filling a small-range artificial island construction secant pile and a pile foundation in a normal water level period, excavating a foundation pit, mounting a steel jacket box, and completing the combined cofferdam in a short construction period. Compared with a traditional method, the construction period is obviously shortened, and a steel platform in the traditional construction method can be omitted; the small-range artificial island can be rapidly filled in the normal water level period, the underwater pile foundation and a trestle used in a flood season water level period can be constructed at the same time, the situation that the underwater pile foundation is constructed after the trestle and the steel platform are erected according to the traditional construction technology is avoided, the construction difficulty of constructing the trestle and the platform on a bare rock is large, and the construction period is long; according to the rapid construction method and structure of the secant pile and steel jacket box combined cofferdam, the elevation of the constructed artificial island is low, the island only needs to be constructed according to a normal water level, filling to the flood season water level elevation is not needed, the filling range of the artificial island is small, filling time is short, and construction cost is low.

The invention discloses an adjustable cross arm electric power steel pipe rod. A cross arm, a cross arm indented fixing hoop, a cross arm fixing indented inner hoop, a cross arm fixing clamping groove steel plate, a cross arm fixing clamping base, a fixing bolt and a cross arm fixing indented inner hoop locking clamping groove are sequentially mounted and connected with an electric power steel pipe rod initially hoisted and standing, wherein the cross arm indented fixing hoop, the cross arm fixing indented inner hoop, the cross arm fixing indented inner hoop locking clamping groove and the cross arm are sequentially mounted in a thinner position at the top end of the electric power steel pipe rod body, so as to form a small diameter cross arm mounting component; the cross arm fixing clamping groove steel plate, the cross arm fixing clamping base, the cross arm and the fixing bolt are sequentially mounted in a larger diameter position of the electric power steel pipe rod body, so as to form a large diameter cross arm mounting component. When the adjustable cross arm electric power steel pipe rod is hoisted, the direction of the rod body is not required to be deliberately noticed, the adjustable cross arm electric power steel pipe rod can be hoisted in any direction, and the directional mounting of the cross arm is accomplished through the adjustable cross arm components.

The invention relates to a construction method for paving a road trough micro-communication pipeline by utilizing a city road, belonging to the optical fiber cable transmission technology field. A trough line is firstly drawn according to a set planning or a designed router, a road surface is cut along the drawn trough line, and a trough is dug out; a four-way or three-way micro-pipe is embedded at one end of the trough, and a micro-pipe joint box is embedded at the other end of the trough which is close to a manhole or a connection box; a pipe bracket is paved at the bottom part of the trough, a micro-cable sub-pipe is distributed on the pipe bracket, the both ends of the micro-cable sub-pipe are extended into the micro-pipe joint box and a micro-pipe branch box; an upper pipe cover is arranged above the sub-pipe, a cover board is finally covered on the pipe cover; and a super early strength repairing agent is poured into the trough. The construction method has the advantages that: the application range is wide, the construction method can be accessed to the tail end of a metropoliatan area network for communicating the prior communication pipeline and a small-diameter rain (polluted) water pipeline, thereby building the supplement for a micro-pipeline system. The advantage of the network capacity expansion is obvious, when in fault of the optical fiber cable, the rush repair is easy, and the recovery of the communication is fast. The construction is flexible and not limited by an underground pipe network, and the construction risk is very small.

The invention relates to the field of oilfield chemistry, in particular to low-temperature expandable graphite suitable for steam injection channeling sealing of heavy oil reservoirs and a preparationmethod and application of the low-temperature expandable graphite. The preparation method of the low-temperature expandable graphite is characterized by comprising the step of carrying out a contactreaction on a compound shown in a formula (1), an oxidant, acid, alkali metal salt and graphite. The low-temperature expandable graphite system has the advantages of being high in expansion rate, goodin thermal stability, capable of being carried into a stratum and flexible in graphite, the steam channeling sealing effect can be improved, the effective service life of a channeling sealing agent can be prolonged, the treatment cost can be reduced, and efficient production of crude oil can be achieved.

The invention belongs to the technical field of construction of slab forms in building engineering, and discloses an I-shaped wooden beam quick positioning and mounting device. The I-shaped wooden beam quick positioning and mounting device comprises a fork lever, wherein a dual-sharp fork head and a C-shaped clamping slot are fixedly mounted / formed at / in the top end of the fork lever through a rivet; a steel rule is mounted in the C-shaped clamping slot and is fixed to the C-shaped clamping slot through a fastening bolt; the dual-sharp fork head comprises two sharp fork teeth which are vertically arranged upwards and a connecting part under the sharp fork teeth; a graduation is marked on the steel rule, and a limiting clamping strip which extends upwards and is perpendicular to a steel rule main body part is arranged at one end of the starting graduation of the graduation; a groove is formed in the surface of the C-shaped clamping slot, and is used for enabling the C-shaped clamping slot to be clamped and fixed to the steel rule; the dual-sharp fork head is mutually parallel to the steel rule; the upper end of the connecting part of the dual-sharp fork head is level with the upperend of the steel rule. Through the adoption of the I-shaped wooden beam quick positioning and mounting device disclosed by the invention, operators can accurately mount I-shaped wooden beams on the ground, the I-shaped wooden beams of different intervals are convenient to position and mount, the working efficiency and the working accuracy of the mounting of the wooden beams are greatly improved, and the risk of the construction is reduced.

The embodiments of the invention provide a derrick detection method and equipment based on an unmanned aerial vehicle. The method comprises the steps of denoising derrick no-load data, extracting central sample points, obtaining derrick no-load simplified data, similarly, obtaining derrick load simplified data, further obtaining derrick no-load structured data, and on the basis, obtaining derrickload structured data; converting the derrick no-load structured data into derrick no-load three-dimensional data, and converting the derrick load structured data into derrick load three-dimensional data; obtaining deformation displacement of a derrick in a subarea within a deformation generation related area according to the two pieces of three-dimensional data; obtaining pneumatic displacement ofthe derrick in a no-load derrick state and a load derrick state within the subarea, and solving difference of the pneumatic displacement and the deformation displacement, thereby obtaining practicaldeformation quantity of the derrick in the subsea and further obtaining practical deformation quantity of all subareas, thereby obtaining derrick stress distribution. According to the method and the equipment, derrick detection efficiency can be improved, and derrick detection construction difficulty and danger coefficient are reduced.

The invention relates to a bidirectional rotary cutter head of a rock boring machine and a bidirectional rotary boring method. The bidirectional rotary cutter head of the rock boring machine comprises a cutter head body, hobbing cutters, slag outlets, grids, buckets, clockwise rotation blind plates, counterclockwise rotation blind plates and high-strength connecting bolts. The counterclockwise rotation blind plates are arranged on the clockwise side of the corresponding buckets. The clockwise rotation blind plates are arranged on the counterclockwise sides of the corresponding buckets. The counterclockwise rotation blind plates and the clockwise rotation blind plates can be used for covering the slag outlets on the counterclockwise sides and the clockwise sides of the corresponding buckets correspondingly. By adoption of the bidirectional rotary cutter head, the service life of the hobbing cutters can be prolonged; and in addition, eccentric rotation or tipping of a shield connected with the cutter head can be avoided through cutter head bidirectional rotation achieved by switching the rotation direction of the cutter head, the construction difficulty and dangerousness are lowered, and the defects that a conventional hard rock cutter head does not have an automatic deflection-preventing function, the service life of a main drive gear pair is short, and a cutter bearing and a main drive bearing are prone to fatigue wear are overcome.

The invention discloses multi-drill-bit wall surface automatic drilling equipment. The multi-drill-bit wall surface automatic drilling equipment comprises a body, a power cavity is formed in the body,a double-shaft motor is arranged in the power cavity, a first motor shaft downwards extending out of the power cavity is arranged on the double-shaft motor, a first bevel gear is fixedly arranged onthe first motor shaft, advancing wheels in front-and-back and left-and-right symmetry are arranged on the lower side of the body, an advancing shaft is hinged between the advancing wheels, and a second bevel gear is fixedly arranged on the advancing shaft. A plurality of drill bits can be installed, automatic switching can be achieved according to the requirements for the sizes of holes, a dustproof mechanism is arranged, the situation that dust is large in the drilling process can be avoided, the drilling equipment can automatically advance and automatically ascend or descend according to theheights of the hole positions, and drilling is automatically completed. The drilling efficiency is greatly improved, dust pollution during drilling construction is reduced, the operation difficulty of the equipment is reduced, and the construction risk is reduced.

The invention discloses a long tunnel flow channel inspection system under a high-flow-velocity flowing water condition. The long tunnel flow channel inspection system under the high-flow-velocity flowing water condition comprises a traction device, an inspection ship, an inspection module and a navigation module. The traction device comprises at least one driver and a traction rope, the driver is fixed on the shore base, one end of the traction rope is connected with the driver, and the other end of the traction rope penetrates through a tunnel and extends out of the tunnel; the inspection ship floats on the flow channel and is connected with the traction rope, so that the inspection ship flows along the traction rope under the action of the driver; the inspection module and the navigation module are both arranged on the inspection ship, the navigation module is in communication connection with the driver so that the inspection ship can flow in the tunnel at a constant speed, and the inspection module inspects the tunnel in the flowing process of the inspection ship. The long tunnel flow channel inspection system under the high-flow-rate flowing water condition can inspect the tunnel under the high-flow-rate flowing water operation condition, full-coverage scanning of the long tunnel is achieved, and the problem that an ROV submersible cannot be used under the high-flow-rate flowing water operation condition is solved.

The invention relates to a method for positioning a bottom section and a broadside section on a heavy lift vessel, which comprises the following steps of: detecting data of the bottom section and the broadside section of the heavy lift vessel by erecting a total station, comparing the detected data with a theoretical value to obtain a three-dimensional change reference value, and obtaining field positioning data of the bottom section and the broadside section; measuring equipment is fully utilized to be combined with three-dimensional analysis software to achieve detection of positioning data of the bottom and the broadside of the heavy lift vessel, the total station is easy and convenient to operate and high in measuring precision, field point position collection can be conducted on bottom data and broadside segments through the total station, and after the collected data are matched with theoretical data of the bottom and the broadside respectively, the positioning data of the bottom and the broadside can be obtained. Therefore, the change conditions of the bottom data and the broadside data can be directly judged on site. According to the method, the positioning precision is high, the change condition of bottom and broadside data can be directly judged on site, the labor intensity of constructors is reduced, and the safety coefficient of the constructors is increased.

The invention discloses an ultrahigh building variable-section integrated lifting operation platform retraction construction method. The method includes: fixing an overhung steel beam on a floor slab; lifting an integrated lifting operation platform; when the integrated lifting operation platform climbs to a non-variable section, loosening a bolt for fixing the overhung steel beam on the floor slab at the non-variable section, and fixedly connecting the front end of the overhung steel beam with the integrated lifting operation platform; adopting another hoist connected between the floor slab and the integrated lifting operation platform to inward pull the integrated lifting operation platform for several times to pull the integrated lifting operation platform in place, and fixedly mounting the integrated lifting operation platform after being pulled in place on the floor slab at the non-variable section.

The invention provides a suspended ceiling installation method which comprises the following steps: drawing ground control lines on the ground in a room requiring for a suspended ceiling; setting wires along a suspended ceiling layout according to a designed comprehensive layout graph of the suspended ceiling using the drawn ground control lines, and forming a complete suspended ceiling control net on the ground; determining the positions of components to be installed on the suspended ceiling control net; projecting the positions of the components to be installed to the roof for roof position marking using a measuring tool; performing suspended ceiling installation. The suspended ceiling installation method has the benefits that the suspended ceiling installation method has the advantages of environment-friendly construction, safety, fastness, economy and reliability. Compared with an installation method for a common light steel keel gypsum board suspended ceiling, the installation method disclosed by the invention has the advantages of small workload, short construction period, and reduction of waste of a large quantity of materials and artificial rework and repair expenses and has the characteristics that the repair cost for a large number of mis-perforated holes is reduced compared with that of the common light steel keel gypsum board suspended ceiling and the problem of reduction of the integral stability of a light steel keel skeleton due to mis-perforation is solved.

The invention relates to the field of engineering equipment, in particular to a drill rod disassembly and assembly auxiliary device and drilling equipment. According to the main technical scheme, the drill rod disassembly and assembly auxiliary device comprises a mounting base and a clamping jaw, the mounting base is used for being connected with a guide column, the clamping jaw is movably connected with the mounting base, a first driving assembly used for driving the clamping jaw to move is arranged between the mounting base and the clamping jaw, the clamping jaw is provided with a second driving assembly, and the second driving assembly is used for controlling opening and closing of the clamping jaw. By means of the clamping jaw with maneuverability, the position of a drill rod can be adjusted, so that alignment connection between the drill rod and a power head is facilitated, the step of manual adjustment is omitted, and then the construction difficulty and the danger coefficient are reduced.

The invention provides a method for mounting a drum framework of a drum strainer in order to solve the problems of high mounting difficulty, low safety factor, low operation efficiency and the like of existing mounting methods. The method includes: sequentially mounting main spokes, connecting each two adjacent main spokes by connectors; assembling an auxiliary spoke group; mounting main cross beams on the main spokes and mounting the auxiliary spoke group on the connectors; using circumferential connection angles to connect all main and auxiliary cross beams; annularly mounting gear ring fixing grooves to the middles of the top ends of the cross beams on the main and auxiliary spokes, and fixing gear rings in the gear ring fixing grooves; circularly fixing a frame on each of two sides of each main cross beam and auxiliary cross beam. Owing to the method for mounting the drum framework of the drum strainer, difficulty in setting up of an auxiliary scaffold is lowered, scaffold climbing frequency is low, and accordingly personal safety of constructors can be guaranteed. Further, the mounting way is easy to control, manpower and material resources are saved, and operating efficiency is improved.

The invention relates to the field of oilfield chemistry, in particular to low-temperature expandable graphite suitable for steam injection sealing channeling in heavy oil reservoirs, a preparation method and application thereof. The method for preparing low-temperature expandable graphite is characterized in that the method comprises: performing a contact reaction on a compound represented by formula (1), an oxidizing agent, an acid, an alkali metal salt and graphite. The low-temperature expandable graphite system has a high expansion rate and good thermal stability, and can be carried into the formation, and the graphite itself is flexible, which can improve the effect of steam sealing and increase the effective life of the sealing agent, reducing the processing cost. Realize efficient output of crude oil.

The invention relates to the technical field of building construction, in particular to a positioning and rectification device for a pile body reinforcing bar cage. An annular cushion block comprisesa large fan-shaped cushion block and a small fan-shaped cushion block matched with the large fan-shaped cushion block. The large fan-shaped cushion block and the small fan-shaped cushion block can bematched to form a complete annular cushion block, and the mating joint of the large fan-shaped cushion block and the small fan-shaped cushion block is provided with mutually matched steps, and a limiting rubber block is arranged at the small arc surface of the small fan-shaped cushion block. The positioning and rectification device for the pile body reinforcing bar cage has the beneficial effectsthat by improving the annular cushion block of the existing reinforcing bar cage structure, the annular cushion block used for reducing the rubbing against the hole wall of a pile hole in the reinforcing bar cage structure has the functions of conveniently inserting a stirrup and rolling down a reinforcing bar cage, thereby obtaining the effects of reducing the rubbing against the hole wall of thepile hole, reducing the cost, reducing the workload of the workers and reducing the construction risk.

The invention discloses a flowerpot capable of achieving classified planting and automatically adjusting moisture and relates to plant growing and greening tools. The flowerpot capable of achieving classified planting and automatically adjusting the moisture comprises a lower pot body and an upper pot body, wherein the lower pot body is detachably connected with the upper pot body. Notches are formed in the front wall of the lower pot body, water storage chambers are arranged on the two sides of the lower pot body, a primary water storage tank is arranged at the bottom of an inner cavity of the lower pot body, the primary water storage tank is provided with a drainage groove, a primary water absorption strip is arranged between each water storage chamber and the primary water storage tank, a first carrying plate is arranged above the primary water storage tank, through hole arrays are formed in the first carrying plate, a first planting cavity is formed between the first carrying plate and the peripheral wall of the lower pot body, and a secondary water absorption strip is arranged between the first planting cavity and the primary water storage tank; notches are formed in the front wall of the upper pot body, a secondary water storage tank is arranged at the bottom of an inner cavity of the upper pot body, a third-level water absorption strip is arranged between the secondary water storage tank and each water storage chamber, the secondary water storage tank is provided with a drainage groove, a second carrying plate is arranged above the secondary water storage tank, through hole arrays are formed in the second carrying plate, a second planting cavity is formed between the second carrying plate and the peripheral wall of the upper pot body, and a fourth-level water absorption strip is arranged between the second planting cavity and the secondary water storage tank.