60results about How to "Avoid affecting construction" patented technology

The invention discloses an environment-friendly and dust-proof electric drill, which comprises a motor body and a storage tank connected to the motor body, a spring is arranged inside the storage tank, one end of the spring is connected to an annular gasket, and one side of the annular gasket is A cylinder, one end of the cylinder is provided with a circular cavity, the inner side of the circular cavity is provided with a through hole, the bottom of the motor body is provided with a handle, the bottom of the motor body is provided with a power switch, and the motor The main body is connected to the drill bit clamp, and the drill bit clamp is connected to the drill bit. A housing is provided on one side of the motor body, an air outlet is provided on one side of the housing, and a motor is provided on one side of the air outlet. The motor passes through The main shaft is connected to the fan blade, and a cavity is provided on one side of the fan blade, and the cavity is connected to the circular cavity through a pipe. The invention has a simple structure, can collect the dust generated during the use of the electric drill, prevents the dust from flying around to affect the indoor environment, and is beneficial to protect the health of the user of the electric drill.

The invention discloses a foundation ditch dewatering and drainage excavation structure and an application method. The application method comprises the following steps of: (1) surveying and setting out the range of a foundation ditch to be excavated; (2) excavating the foundation ditch in a sloping supporting manner till reaching an elevation above an underground water level, and carrying out mutual overlap joint of cement-soil mixing piles along the periphery of the foundation ditch to form a waterproof curtain which stretches into a water-tight layer below a foundation base elevation; (3) continuously excavating the foundation ditch by regions in a sloping manner till reaching the foundation base elevation, carrying out dewatering and drainage during excavation, and spraying a concrete surface layer onto a slope surface below the underground water level after ending excavation. The application method has the beneficial effects that underground water outside the ditch is isolated from a working plane in the ditch in a construction process; well-point dewatering is not needed during construction; meanwhile, the simultaneous operation of earthwork construction and dewatering and drainage is ensured, thereby greatly improving the construction efficiency and ensuring the construction quality.

The invention provides an antitheft drain pipe structure with maintenance and adjustment functions, and belongs to the field of related components of drain pipes. By the aid of the antitheft drain pipe structure, the problem of influence of existing antitheft drain pipe devices on external wall construction can be solved. The antitheft drain pipe structure with the maintenance and adjustment functions comprises a drain pipe, a movable pipe and an antitheft plate. Two positioning rings are fixed onto the outer wall of the drain pipe, the movable pipe sleeves the drain pipe, two ends of the movable pipe are respectively butted to the two positioning rings, a plurality of antitheft spines are arranged on the outer side surface of the antitheft plate, the right side edge of the antitheft plate is connected with the outer wall of the movable pipe, a first connecting seat is fixed onto an external wall, a second connecting seat is fixed to the inner side surface of the antitheft plate, a first pin hole and a second pin hole are respectively formed in the first connecting seat and the second connecting seat, the outer side surface of the antitheft plate is reverse to the external wall, the first pin hole and the second pin hole are aligned and communicated with each other, and plug pins can be respectively inserted into the first pin hole and the second pin hole, so that the antitheft plate can be fixed onto the external wall. The antitheft drain pipe structure has the advantages that antitheft effects can be realized, and the antitheft drain pipe structure can be adjusted, so that external wall construction can be facilitated.

The invention provides concrete vibrating equipment, and relates to the technical field of vibrating equipment. The concrete vibrating equipment comprises a bottom supporting plate, wherein the upper end of the bottom supporting plate is fixedly connected with a fixed frame; side inclined supporting rods are fixedly connected between the two ends of the fixed frame and the bottom supporting plate; upper fixed plates are fixedly arranged on the upper parts of the two sides of the front end of the fixed frame; lower fixed plates are fixedly arranged on the lower parts of the two sides of the front end of the fixed frame; threaded columns are rotatably arranged between the upper fixed plates and the lower fixed plates; slide bases are in threaded sleeve on the two threaded columns; and a placing platform is fixedly connected between the two slide bases. The concrete vibrating equipment provided by the invention can flexibly regulate depth of being inserted into concrete, so that the concrete vibrating equipment is suitable for vibrating concrete of different thicknesses, and therefore, vibration of a vibrating rod is more stable, and the vibrating effect is better; and moreover, the concrete can be repeatedly rolled and stirred, so that flatness and compactness of the concrete are realized.

The invention provides a high-altitude escape device. The device comprises a guide rail assembly and a life-saving assembly; the guide rail assembly comprises a sliding block and a sliding rail, wherein the sliding rail is fixedly connected to the lower side of an upper-layer floor slab, the sliding block is matched with the sliding rail, the sliding block extends out of the outer side of the upper-layer floor slab, and a pulley seat is fixedly connected to the lower side of the end part of the sliding block; the life-saving assembly comprises a life-saving air bag, a hanging net, a pulley anda pull rope, at least one layer of air bag cavity is formed in the life-saving air bag, an life-saving cavity allowing people to ride is formed in the air bag cavity, an escape opening communicatingthe life-saving cavity is formed in the outer wall of the life-saving air bag, the hanging net covers the lower side of the life-saving air bag, the upper side of the hanging net is fixed to one end part of the pull rope, the pull rope is wound round the pulley, and the other end of the pull rope is fixed to the pulley. The high-altitude escape device has the beneficial technical effects that thesafety is high, escape personnel can be quickly brought to the position close to the ground, escape of personnel is facilitated, and the survival rate of the high-rise building in the fire disaster isimproved.

The invention relates to a rainy season roadbed earthwork construction structure and a construction method thereof, and relates to the technical field of road construction. The construction structurecomprises a drainage assembly arranged in a settling well; and the drainage assembly comprises a drainage pipe and a hollow filter box, wherein the drainage pipe is communicated with the filter box, and a plurality of filter holes are formed in the side wall of the filter box. During use, the drainage assembly is installed in the excavated settling well, and the drainage pipe is communicated witha municipal pipeline; in the rainy period, rainwater is discharged into the settling well, a large amount of silt in the rainwater is settled to the bottom of the settling well, then, the rainwater enters the filter box through the filtering holes, and finally, the rainwater is discharged into the municipal pipeline through the drainage pipe, so that the rainwater is effectively prevented from being directly poured into the foundation pit to influence construction; and meanwhile, the filtering holes play a role in filtering rainwater, so that a large amount of silt or leaves and other garbageare prevented from entering the municipal pipeline, smooth drainage of the municipal pipeline is guaranteed, the possibility of water accumulation is reduced, and normal construction after raining canbe guaranteed as soon as possible.

The invention belongs to the technical field of prefabricated reinforced concrete structures, and particularly relates to a reinforced concrete prefabricated part. The reinforced concrete prefabricated part comprises a board body, the board body is internally provided with a group of splicing units, an anti-seepage unit and an anti-corrosion unit; the board body is arranged in a reverse L shape; the group of splicing units are arranged on the side face of the board body, and the splicing units are used for splicing adjacent board bodies; the anti-seepage unit is arranged on the sides, in the board body, of the splicing units, and used for preventing seawater from penetrating into the board body; the anti-corrosion unit is arranged on the side, away from the splicing units, of the anti-seepage unit, and used for preventing the seawater from corroding reinforcements in reinforced concrete; and the splicing units, the anti-seepage unit and the anti-corrosion unit are matched with each other to prevent the seawater from penetrating through the board body and entering a foundation pit, and meanwhile, corrosion of the seawater on the concrete and the reinforcements is avoided, and normalworking of the board body is ensured.

The invention discloses a power cable duct laying device which comprises a belt pulley and a bracket, wherein a rotary shaft is arranged in the belt pulley; a position-limiting clamp is fixed on the outer side of the rotary shaft; the lower part of a driving belt is connected with a motor; a base is arranged under the motor; universal rolling sliding wheels are fixed below the base; a crank is arranged on the right side of a cable winding reel; a fixing device is arranged on the left side of the crank; a rotary shaft fixing sleeve is fixed above the bracket; the base is connected to the lower part of the bracket; connectors are fixed on the inner sides of the position-limiting clamp; and a fixing sleeve buckle is arranged on the right side of the rotary shaft fixing sleeve. The power cable duct laying device controls a corresponding stepping motor to rotate so as to drive a fixing rack to rotate to switch over to a new power cable winding reel to continuously reel the power cable, so that automatic, intelligent and continuous non-halt reeling is realized, manual intervention is reduced to the maximum, the labor intensity of a worker is alleviated, and the reeling and laying speed is accelerated to reduce the construction cost.

The invention discloses a heading machine cutter disc. The heading machine cutter disc comprises a cutter disc body, wherein a mounting hole is formed in the cutter disc body in a penetrating manner;a freezing part is arranged in the mounting hole; the freezing part is connected with a driving device for driving the freezing part to extend out or retract back to the cutter disc body and is connected with a freezing pipeline which supplies a freezing medium into the freezing part. According to the heading machine cutter disc, because the retractable freezing part is arranged, in a cutter replacement or repairing operation, insertion point type freezing on a soil body arranged at the front end of a heading surface can be carried out to form a freezing isolation layer, so that the strength and the stability of the soil body arranged on the heading surface, and a safe and convenient operation environment is provided for a cutter replacement operation; meanwhile, because the freezing partextends out of the cutter disc body and then a freezing operation is carried out, freezing of a cutter disc steel structure can be reduced, and an ineffective operation of groundbreaking bin frozen soil is reduced and lowered. The invention further discloses a heading machine including the heading machine cutter disc and a cutter replacement method applied to the heading machine cutter disc.

The invention provides a building foundation pit supporting structure. The building foundation pit supporting structure comprises four supporting plates, fixing units, top opening units, mounting units and corner angle supporting units, wherein the four supporting plates are arranged on the inner wall of a foundation pit to define a supporting frame, and pit edge protection plates perpendicular to the supporting plates are arranged on the tops of the supporting plates; the fixing units are installed on the sides, away from the supporting plates, of the pit edge protection plates; the adjacent pit edge protection plates are connected through the top opening units; the bottoms of the supporting plates are connected with a mounting plate through the mounting units; and the adjacent supporting plates are connected through the corner angle supporting units. During downward excavation construction in the foundation pit, the mounting plate for supporting can be additionally arranged downwards on the basis that an original supporting structure is not disassembled, a supporting mechanism does not need to be arranged again, the risk of foundation pit collapse is reduced, the side wall of the foundation pit is not supported by a large number of inclined supporting rods inside, a large construction space can be reserved for the foundation pit, and construction in the foundation pit is not influenced.

The invention relates to the field of municipal engineering, and aims to provide a municipal engineering cable insertion device. The device comprises a bottom plate, a lifting groove is formed in the outer wall of the top of the bottom plate, a supporting frame is welded to the position, close to the lifting groove, of the outer wall of the top of the bottom plate, and a lifting motor is installed on the outer wall of the top of the supporting frame through screws; a lead screw is fixedly installed at the output end of the lifting motor through a coupler, the exterior of the lead screw is in threaded connection with a lifting mechanism, and the lifting mechanism is slidably connected into the supporting frame; and the lifting mechanism comprises a lifting frame, and a screw hole is formed in the outer wall of the top of the lifting frame. The device has the beneficial effects that through the arranged lifting mechanism, the lifting frame of the lifting mechanism can be driven by the lifting motor to automatically go deep into a well during use, and a cable is guided through a first reversing roller and a second reversing roller, so that friction between the cable and an underground turning point can be effectively prevented, an operator does not need to manually place the device underground, and the device is convenient to use.

The invention relates to the technical field of building engineering, in particular to a stair tread for building construction reinforcement. The stair tread comprises tread bodies used for pouring of a stair tread formwork and V-shaped reinforcing rods arranged below the tread bodies, reinforcing blocks are arranged on two sides of each individual tread body, and a reinforcing plate is arranged on each reinforcing block. By the technical scheme, the stair tread for building construction reinforcement is used for reinforcing treads and is safe.

The invention belongs to the technical field of building equipment, particularly relates to a detachable CFG pile drilling device. In order to solve the problem that a CFG pile drill rod with the toolong length is relatively inconvenient to use, the following scheme is provided presently. According to the scheme, the detachable CFG pile drilling device comprises a main body, a first drill rod anda second drill rod, a first through hole is formed in the middle of the main body, the main body is provided with a first fixing ring and a second fixing ring at the first through hole in a welded mode, a rotating body is rotationally connected to the middle of the second fixing ring, a fixing box is welded to the top end of the rotating body, a driving mechanism is arranged inside the fixing box, the fixing box is annular, and the first drill rod is located in the middle of the fixing box. According to the detachable CFG pile drilling device, rollers, spiral pieces, the first drill rod and the second drill rod are arranged, the driving mechanism enables the two rollers to drive the first drill rod to rotate and descend through the spiral pieces, then a fixing rod at the bottom end of thesecond drill rod is inserted into the first drill rod, so that the first drill rod is connected with the second drill rod, the second drill rod is continuously added so that the drilling depth can becontinuously increased.

The invention discloses a water collection and drainage device for deep foundation pits in building construction, and relates to the technical field of building construction. The water collection anddrainage device comprises a dewatering well, and drainage equipment fixedly installed in the dewatering well, wherein the dewatering well comprises downhole pipes which are provided with a number of uphole pipes connected in sequence, and the uphole pipes and the downhole pipes are connected; the uphole pipes comprise a pipe body, the bottom end of the pipe body is provided with an inner sleeve, the top of the pipe body is provided with a second guide tube, the end of the second guide tube is provided with a second nozzle portion, and there are two ends of the second nozzle portion; the top inner side wall of the pipe body is provided with a fixed convex ring, the upper surface of the fixed convex ring is provided with a plurality of second elastic telescopic members, and the ends of the plurality of second elastic telescopic members are provided with supporting ring bodies. Through the detachable downhole pipes and downhole pipes, the water collection and drainage device provided by the invention can effectively prevent the well pipe from being easily damaged due to a large amount of exposure of the dewatering well; meanwhile, the downhole pipes and the downhole pipes are matchedby the guiding sleeve of the first guiding pipe and second guiding pipe, and the disassembly and installation operation is simple.

The invention provides a composite type stopper mechanism, including a composite stopper, the composite stopper includes an upper stopper and a lower stopper arranged parallel to each other, and the upper stopper and the bottom stopper A wear-resistant rubber layer is arranged between the pulp plates. The setting of the composite type stopper increases the wear resistance; when the upper stopper is worn, the wear-resistant rubber layer compensates the worn part of the upper stopper under the action of elasticity. The present invention also proposes a shield tunnel boring machine, comprising the composite slurry stop mechanism described in any one of claims 1-5. When the shield machine advances forward, the gap between the rock wall and the shield tail is synchronously grouted, and the composite grout-stop plate extends backward due to the force to form a closed space to enhance the airtightness of the grouting environment; prevent the grout from pouring back into the front of the shield Affect the construction, reduce the waste of grout, ensure the quality of segment installation, and improve work efficiency.

The invention discloses a safety protection device for building electrical construction. The safety protection device comprises a protection box, bidirectional telescopic plates, an electrical cabinetfixing plate lifting unit, a telescopic plate jacking unit and a telescopic supporting rod. A mounting plate is arranged in the middle of the inner side of the protection box; the electrical cabinetfixing plate lifting unit is mounted on the mounting plate around a through groove; an electrical cabinet fixing plate is installed on the electrical cabinet fixing plate lifting unit, the tops of thetelescopic supporting rods are connected with the four corners of a square frame respectively, the telescopic plate jacking unit is arranged on a cross beam fixed to the middle of the square frame, and the ends, close to each other, of the two bidirectional telescopic plates are movably connected with jacking blocks of the telescopic plate jacking unit respectively; and when the electrical cabinet is used, protection is carried out from the top, construction is prevented from being affected by light rain and other weather, the electrical cabinet can be sealed and stored in the protection boxwhen not used, normal operation of the electrical cabinet in use is guaranteed, normal construction is facilitated, and electric leakage of the electrical cabinet due to smashing or weather problems is avoided.

The invention provides a multifunctional adjustable mechanical equipment hoisting frame which comprises a base, a rotary bearing frame device, a rainproof illumination frame device, a telescopic hanging bracket device, a shake-proof transferring box device, moving wheels, a limiting inserting plate, a control switch, a hydraulic jack, a bearing plate, a fan-shaped connecting plate, a control line,a hoisting motor, an oil wire rope and a falling-preventing lifting hook. A bearing column is arranged in a dustproof tube, through arrangement of the bearing column being inserted into an inner ringof a rotary bearing inlaid in a bearing box, the rotating function of the mechanical equipment hoisting frame is achieved advantageously, and the problem that the angle cannot be rotated is solved; through arrangement of an illuminating lamp and a rainproof cover, a construction place can be illuminated advantageously, rain prevention can be conducted on hoisting equipment advantageously, and theproblem of no matched illuminating and rainproof equipment is solved; and through arrangement of a shake-proof sponge plate, the damping effect is achieved advantageously when mechanical equipment with a fragile shell is hoisted, and the problem that the mechanical equipment cannot be prevented from shake is solved.

The invention relates to the technical field of retarding water reducers, in particular to a high efficiency concrete retarding water reducer. The high efficiency concrete retarding water reducer is prepared from the following raw materials in parts by weight: 40 to 60 parts by weight of polycarboxylic acid mother liquor, 5 to 15 parts by weight of sodium gluconate, 3 to 8 parts by weight of maltodextrin polyacrylamide grafted copolymer, 1 to 5 parts by weight of asbestos wool, 2 to 6 parts by weight of polyaluminum chloride, 3 to 8 parts by weight of anhydrous sodium sulfate, 2 to 5 parts byweight of calcium chloride, 5 to 12 parts by weight of poly ethylene glycol monoethyl ether, 1 to 5 parts by weight of p-aminobenzene sulfonic acid, 3 to 10 parts by weight of chitin, 0.2 to 3 parts by weight of sodium polyaspartate, 10 to 20 parts by weight of ammonium citrate, 3 to 8 parts by weight of acetone and 40 to 60 parts by weight of water. The retarding water reducer disclosed by the invention has the advantages that the condensation time of the concrete can be adjusted, the slump loss of the concrete also can be slowed down and the adaptability of the product is improved.

The invention relates to an adjustable-type damping support for a concrete pump pipe. The adjustable-type damping support comprises a clamping ring used for sleeving and bearing the concrete pump pipe, a central sliding rod, a plurality of supporting rods and a plurality of connecting rods. The clamping ring is rotatably connected to the top of the central sliding rod; the supporting rods are distributed at the periphery of the central sliding rod at intervals, and the upper ends of the supporting rods are rotatably connected to the upper portion of the side wall of the central sliding rod; and the connecting rods and the supporting rods are arranged correspondingly, one end of each connecting rod is rotatably connected to the corresponding supporting rod, and the other end of each connecting rod can slide up and down in the height direction of the central sliding rod and is positioned on the central sliding rod. In the adjustable-type damping support for the concrete pump pipe, by arranging a damping gasket and a damping beam, energy generated by pump pipe vibration during concrete pumping is effectively absorbed, orderly vibration of the pump pipe is ensured while the situation that construction is affected by vibration transmission is avoided, impact between concrete and the pump pipe is reduced, and the pressure loss in the pumping process is reduced.

The invention discloses a dewatering well structure in a foundation pit and a construction method. The method comprises the steps that the construction position of a dewatering well is determined through survey and setting-out in the foundation pit, and an excavation mark is made; local deep excavation is conducted in the foundation pit along the excavation mark, so that the dewatering well is formed; a protective barrel is placed in the dewatering well, and a water pump is placed in the protective barrel; gravel backfilling is conducted on the over-excavation part around the protective barrel; and the water pump is started to pump water till the water level in the foundation pit is lowered to the safe water level. According to the dewatering well structure in the foundation pit and the construction method, the construction workload of the dewatering well is greatly reduced, and the construction cost is reduced; and through cooperation of a submersible pump and the protective barrel, the effective dewatering range is reasonably enlarged, the dewatering effect is guaranteed, and the construction quality is guaranteed while the construction cost is reduced.

The landscape landscaping construction lineation equipment comprises a vehicle body, a driving assembly, a material storage assembly and a lineation assembly, a straight-moving motor is installed at the top of one end of the vehicle body and used for controlling the vehicle body to do straight-moving motion, and a steering assembly is installed at the other end of the vehicle body and used for controlling the vehicle body to steer; a square groove penetrating through the vehicle body is formed in the middle of the vehicle body, a supporting plate is erected above the square groove, a control box is fixed to one side of the top end of the supporting plate, a driving assembly is fixed to the side, close to the straight moving motor, of the top end of the vehicle body, and a scribing assemblyis arranged at the bottom of the supporting plate and connected with a storage assembly through a connecting pipe. The storage assembly is fixed to the side, away from the supporting plate, of the driving assembly.

The invention discloses a construction method of a novel corrosion-resistant pressed metal shelter roof. Novel corrosion-resistant pressed stainless steel plates are successively connected in an overlap joint manner on a beam to form a roof panel and the roof panel is connected with the beam. And Novel corrosion-resistant pressed stainless steel plates are successively connected in an overlap joint manner on the beam to form a gutter and the gutter is connected with the beam. The construction method has the following beneficial effects: on the basis of the strength and rigidity of the novel corrosion-resistant pressed stainless steel plates, the plates can serve as a working platform to support the staff and thus no extra supporting structure to support the under-construction roof and theconstruction staff is needed, so that construction of the supporting structure is saved and thus the use of materials, manpower and equipment can be reduced; the construction period occupied by the construction of the supporting structure is saved, so that the construction period is shortened and the construction cost is saved.

The invention discloses a deep foundation pit supporting and protecting assembly. The supporting and protecting assembly comprises an assembly main body arranged in a deep foundation pit and used forsupporting, wherein the assembly main body comprises a first baffle, a second baffle, a base assembly and a supporting assemblies, the first baffle and the second baffle are parallel to each other andabut against the two inner side walls of the deep foundation pit correspondingly, the first baffle and the second baffle are connected with the side walls of the deep foundation pit through fixing assemblies, the bottom of the base assembly abuts against a soil layer at the bottom of the deep foundation pit, the two symmetrical supporting assemblies are arranged between the first baffle and the second baffle, water guiding assemblies are arranged in the first baffle and the second baffle correspondingly, and exudation water on the side walls of the deep foundation pit is guided out through the water guiding assemblies and water guiding holes formed in the first baffle and the second baffle. According to the supporting and protecting assembly, the baffles and the supporting assemblies arefast to install, the problem of water seepage of the side slope of the deep foundation pit is solved through the arrangement of the water guiding assembly, and compared with a traditional method thata drainage ditch is formed in the deep foundation pit, the foundation construction working face is enlarged, and the labor and material cost is reduced.

The invention provides a segmental box girder prefabrication construction structure. The structure comprises a hydraulic oil tank, movable brake wheels, a hydraulic pump, an oil outlet pipe, rubber plug shells, a hookable supporting clamping plate structure, an adjustable shunt box structure, a rotatable sealing pipe structure, a backflow conveying pipe structure, an observation piece, a lifting rod, a filling pipe, a rubber cover, a U-shaped clamping seat, a supporting pipe and an inverted T-shaped supporting seat, wherein the movable brake wheels are in bolt connection to four corners of thelower end of the hydraulic oil tank. A shunt box, connecting pipes, an oil inlet pipe, oil filling pipes and the rubber plug shells are arranged, the corresponding number of the rubber plug shells can be selected to be inserted into pipes according to the set number of the pipes in the construction process, and different rubber plug shells are filled with hydraulic oil by mutual cooperation of the shunt box, the connecting pipes and the oil filling pipes, so that a plurality of the rubber plug shells can be conveniently filled in work.

The invention relates to a foundation pit drainage device and a construction method thereof, and relates to the technical field of building construction. The foundation pit drainage device comprises a water collecting table, a permeable plate, a water collecting pipe and a drainage assembly, the water collecting table is located at the bottom of a foundation pit, the upper surface of the water collecting table is obliquely arranged downwards in the direction close to the edge of the foundation pit along the center, the permeable plate is located above the water collecting table, a water collecting well is formed between the permeable plate and the water collecting table, and multiple water-permeable holes are formed in the permeable plate; the water-permeable holes are communicated with the water-collecting well, the water-collecting pipes are vertically arranged at the corners of the foundation pit respectively, one end of each water-collecting pipe is communicated with the water-collecting well, and the drainage assembly is used for draining rainwater in the water-collecting well. During working, accumulated water in a small water pit and a ditch at the bottom of a foundation pit leaks into the water collecting well through the water permeable plate, and then the accumulated water collected in the water collecting well is drained through the drainage assembly. The foundation pit drainage device has the advantages of being high in construction efficiency and good in drainage effect.

The invention relates to a block-type covering and anti-silting system of subgrade geotextiles for submerged tube tunnels, which includes a compartment geotextile desilting device and a special ship, and the compartment geotextile desilting device includes compartments, steel wire ropes, steel pipes The steel pipes are arranged at both ends of the geotextile, the two steel pipes are connected by steel wire ropes, the geotextile is arranged above the steel wire rope, and the four sides and the middle of the geotextile are respectively connected with the steel wire rope and the steel pipe through locks; the special ships include two The laying boat is connected with the silt removal device through a lifting wire rope. The anti-silting scheme of geotextile compartment covering the foundation bed of immersed tube tunnels in blocks can avoid excessive silting and affect the construction, completely isolate the silting and the foundation bed, and ensure that the dredging will not damage the already leveled bedding.

The invention discloses a strengthening method of a construction channel on a weak bearing layer. The construction channel on the ground of the weak bearing layer is filled with filler mixed with an adhesive and / or a curing agent to enable the construction channel to form a continuous reinforcing area. According to the strengthening method, the construction channel in the weak bearing layer is reinforced to form the continuous reinforcing area, so that the bearing capacity strength of the construction channel is improved, and a travelling mechanism of a construction machine is prevented from sinking and being trapped. According to the strengthening method, after the adhesive and / or the curing agent are mixed with the soil body, dispersed soil in the soil body is firmly bonded together, thestrength is improved after hardening, and the bearing capacity is enhanced. The strengthening method greatly improves the bearing capacity of the construction channel to the construction machinery, prevents the travelling mechanism of the mechanical equipment on the construction channel from sinking and affecting the normal construction. The method is suitable for strengthening construction channels on weak bearing layers of various soil types, thus creating favorable conditions for construction operation, accelerating construction progress, improving engineering applicability and being easyto be widely applied.

The invention relates to the technical field of retarding water reducing agents, in particular to an efficient concrete retarding water reducing agent preparation method which includes the steps: (1)adding sodium polyaspartate, p-aminophenylsulfonic acid and polyethylene glycol mono-ether into poly aluminum chloride, stirring mixture for 0.5-1.5h at the temperature of 105-125 DEG C, and performing sealing and standing for 1-2h at the temperature of 0-5 DEG C to obtain modified poly aluminum chloride; (2) uniformly mixing polycarboxylate mother liquor, sodium gluconate, maltodextrin polyacrylamide grafting copolymers, chitin and ammonium citrate in mixed solution of water and acetone, adjusting a pH (potential of hydrogen) value of a mixed system to reach 6.6-7.5, stirring mixture for 20-30min at the temperature of 80-100 DEG C, and adding asbestos wool, the modified poly aluminum chloride, anhydrous sodium sulfate and calcium chloride after cooling to obtain the retarding water reducing agent. The water reducing agent prepared by the method has the advantages that the water reducing agent is wide in adding range, low in concrete shrinkage ratio, green, environmentally friendly andthe like.

The invention discloses a coastal sand foundation pit slope construction device and method.The device comprises a first base, a U-shaped frame and a positioning drill rod, two supports are arranged on the first base, the U-shaped frame is rotationally connected between the two supports, a third pressing plate is arranged at the front end of the first base, and a second pressing plate is arranged at the front end of the third pressing plate; at least one third pressing plate is connected to the third pressing plate in a sliding mode, and a positioning drill rod is inserted into the front end of the third pressing plate. The problem that when a net is hung on the side slope, the reinforcing mesh and the side slope are not easy to fix is solved, when the side slope is subjected to guniting, damage to vegetation in the area outside the side slope is avoided, the utilization rate of concrete is increased, meanwhile, the burden of workers is relieved, and the side slope guniting device is convenient to use, easy to operate and easy to popularize.