88results about How to "Reduce difficulty of removal" patented technology

The invention relates to the technical field of medical equipment, and discloses a bracket positioning frame and a manufacturing method of the bracket positioning frame. The bracket positioning frame is used for positioning a bracket and comprises a plurality of fixed frames and a support mechanism, wherein the fixed frames are arranged around the periphery of the bracket; the inner frame shapes of the fixed frames are matched with the outline shape of the bracket; the bracket is fixed in the fixed frames; the fixed frames are assembled on the support mechanism; the shape of the support mechanism is matched with the anatomical shape of the part, contacting the support mechanism, in an oral cavity of a patient; and the fixed frames correspond to teeth one by one. The bracket positioning frame can provide a very accurate bracket bonding position under the premise of not changing the traditional direct bonding habit of an orthodontist, and is simple to disassemble and assemble and low in cost. According to the manufacturing method of the bracket positioning frame, personalized customization of the bracket positioning frame can be conveniently carried out according to the dentition of the patient; the design and manufacturing processes are completely digitized; and the accuracy, the repeatability and the feasibility all are very ideal.

The invention discloses a method for synthesizing degarelix, wherein an amino resin protected with Fmoc is used as a raw material; according to a solid-phase synthesis method, DIC / HOBt (N,N'-diisopropylcarbodiimide / 1-hydroxybenzotrizole) is used as a coupling agent for transpeptidase reaction; 4-serine uses tert-butyl dimethyl to replace tertiary butyl for protection protecting hydroxyl; a hydroorotic acid fragment connected with 4-amino of 5-phenylalanine benzene ring is protected with triphenylmethyl at first, and then introduced, so that the rearrangement side reaction is prevented; and since D-4Aph (Cbm) is used for replacing D-4Aph (Cbm-tBu), a t-Bu removal difficulty is prevented and the occurrence of the side reaction is reduced. A synthesis technology of the method for synthesizing degarelix is simple in steps, easy to control, small in environment pollution and high in yield, thereby being applicable for industrial production.

The invention provides a green method for recycling lithium in cathode materials, and the method comprises the following steps of 1, using cathode materials containing lithium and mixture of weak base and water as the reaction raw materials, carrying out reaction at the temperature of 5 DEG C-90 DEG C and at the pressure of 0.2 MPa-1.0 MPa, proceeding liquid-solid separation on the materials remaining after the reaction and then obtaining lithium and residue; 2, carrying out postprocessing on the extraction solution of lithium to obtain lithium carbonate. The green method for recycling lithium in cathode materials has simple procedures and green reaction process, during which, the leaching efficiency of lithium is larger than 95 WT%, the purity of lithium carbonate is larger than 98.5 WT%, and the impurity content satisfies national standard GB / T11075 2013.

The invention provides a method for selectively recycling lithium in a waste lithium ion battery positive electrode material. The method comprises the following steps: (1) adding an oxidant into the waste lithium ion battery positive electrode material and carrying out oxidization reaction; converting lithium into water-soluble lithium salt through an auxiliary agent; (2) leaching the water-soluble lithium salt obtained by step (1) in water or an acidic solution and filtering to obtain a lithium-enriched solution and leached residues. The method provided by the invention has a simple flow anda clean process and the recycling rate of the lithium can reach 95 percent or above.

The invention discloses an electrical heating anti-icing assembly with a superhydrophobic property and a preparation method of the electrical heating anti-icing assembly. The anti-icing assembly comprises an insulation heat insulating layer, an electrically heating layer, an insulation heat conduction layer, a heat conduction metal layer, a superhydrophobic coating and waterproof adhesive tape, wherein the insulation heat insulating layer, the electrically heating layer, the insulation heat conduction layer, and the heat conduction metal layer are successively spliced from bottom to top, the superhydrophobic is coated on the surface of the heat conduction metal layer, and the waterproof adhesive tape is sealed around the assembly. The electrical heating anti-icing assembly with the superhydrophobic property has the beneficial effects that the anti-icing assembly has the superhydrophobic property and can remarkably reduce the adhesive strength of a surface ice layer, thus formation of the surface ice layer and removing difficulty of the ice layer can be reduced in a certain level, the ice layer covered on the surface can be removed quickly and completely, heating time is shortened,the removing efficiency of the ice layer is greatly improved, waste of energy is reduced, and great application prospects are provided for equipment such as an airplane in the ice removing field.

The invention relates to a novel process for treating chemical copper plating waste water by combining a physicochemical method and a biological method. The waste water is divided into conventional chemical copper plating waste water and high-concentration chemical copper plating waste water. After the conventional chemical copper plating waste water is treated by copper deposition through sodium sulfide and Fenton oxidation, the effluent CODCr is reduced below 150mg / l; after the high-concentration chemical copper plating waste water is treated by copper deposition through sodium sulfide, EDTA acid precipitation, Fenton oxidation and biological anaerobic and aerobic treatment, the CODCr value can be reduced below 100mg / l; and other pollutants are well treated. By adopting the method of the invention, in the two kinds of the chemical copper plating waste water, the maximum removing rate of the CODCr can respectively reach 97.55% and 99.17%, and the removing rates of copper and nickel (heavy metals) can respectively reach 99.98% and 98.92%. The method provides a novel treatment way for the chemical copper plating waste water which is generated in circuit board industries and can not be easily treated, realizes the purpose of effectively treating various pollutants, and fully recycles various effective resources in waste water simultaneously.

The invention relates to liquid waste treatment tank comprehensive cleaning equipment. The liquid waste treatment tank comprehensive cleaning equipment comprises a top supporting plate, supporting devices, a cleaning device and a suction device. The front and rear ends of the supporting plate are each provided with an expansion groove. One supporting device is mounted in each expansion groove of the supporting plate. The cleaning device is mounted on the lower end face of the middle portion of the top supporting plate. The suction device is mounted on the cleaning device. The suction device comprises a scraping plate electric sliding block, a scraping connecting plate, a scraping angle plate, a scraping angle push rod, scraping cylinders, scraping sliding columns, a sliding column connecting plate, a scraping mechanism, a suction mechanism and sliding column springs. Through the liquid waste treatment tank comprehensive cleaning equipment, the problems that an existing liquid waste treatment tank is large in cleaning difficulty, low in cleaning efficiency and not thorough in cleaning, the sidewall of the treatment tank cannot omnidirectionally at a time, sundries cleared off from the treatment tank cannot be automatically gathered and the cleaning difficulty of the sundries at the bottom of the treatment tank is large can be solved.

An optimization method for a servo valve core working edge small burr online removal process system comprises the steps: (1) performing grinding simulation on the end face of a valve core by finite element software, measuring the height and width of generated burrs, and carrying out optimization on actual processing parameters; (2) carrying out a grinding experiment on the end face of the valve core, measuring the height and width of the generated burrs, and comparing with simulation results to obtain a relevant change rule between the sizes of the burrs and the actual processing parameters; (3) carrying out a working edge small burr removal experiment by using a turning way, and measuring the turning force in the process; (4) constructing an optimized process system and specific process parameters thereof according to the sizes of the burrs obtained in the steps (1) and (2) and the turning force in the step (4); (5) carrying out working edge small burr online removal on the optimized process system. By adopting the optimization method, the burr online removal process system is optimized, the production efficiency is improved, the part scrap rate is reduced, and the production cost is lowered.

The invention provides a method for cleanly recycling nickel and / or cobalt from a positive electrode material. The method comprises the following steps: (1) reducing the nickel and / or cobalt in the positive electrode material to obtain a reduction material; (2) mixing the reduction material and an ammoniacal solution in a closed container, leaching under the condition that the pressure of carbon dioxide gas is 0.2 to 1.0 MPa and then performing first solid-liquid separation to obtain leaching residues and leaching liquid; and (3) performing aftertreatment on the leaching liquid to obtain the nickel and / or cobalt. By the method, the leaching rate of the nickel and / or cobalt in the positive electrode material is high, the obtained nickel and / or cobalt has low impurity content, the process condition is mild, the flow is simple, the process is clean, and the obtained nickel / cobalt can be used for preparing the positive electrode material of a battery.

The invention provides a method for manufacturing a semiconductor device. The method comprises the following steps: providing a semiconductor substrate, wherein a grid structure is formed on the semiconductor substrate, and a side wall structure is formed on two sides of the grid structure; forming an embedded germanium-silicon layer of which the top part is not higher than the surface of the semiconductor substrate in the position of a source / drain region of the semiconductor substrate; removing the side wall structures; performing low-doped ion injection so as to form an inactivated low-doped source / drain area in the semiconductor substrate; forming another side wall structure on two sides of the grid structure; forming a silicon cap layer on the embedded germanium-silicon layer. Through the adoption of the method, damage to a grid hard shielding layer can be compensated in the process that the side wall structures on two sides of the grid structure are removed after the embedded germanium-silicon is formed, and the difficulty in eliminating the side walls is reduced.

The invention discloses a portable chip removing device capable of screening. The device comprises a fixed base, and an H-shaped supporting frame is welded to the edge of the top end of the fixed base. A feeding groove is formed in the middle of the top end of the fixed base; a conveying belt is mounted in the feeding groove; a limiting neck is formed in the middle of the bottom end of the inner wall of the H-shaped supporting frame; a first air cylinder is mounted on one side of the inner wall of the H-shaped supporting frame; an I-shaped screening mounting plate is mounted at the push rod end of the first air cylinder; a first hydraulic push rod is mounted in the middle of the bottom end of the I-shaped screening mounting plate; a screening plate is mounted at the push rod end of the first hydraulic push rod; and through a first air cylinder, an I-shaped screening mounting plate, a first hydraulic push rod, a screening plate, a screening groove and an indicating lamp, chips mounted on the surfaces of chip strips can be detected, and through detection and screening of the chips mounted on the surfaces of the chip strips, workers can find out damaged chips, so that the workers canconveniently remove the damaged chips.

The invention provides an array substrate and a manufacturing method therefor. The array substrate comprises a first conductive pattern, wherein the first conductive pattern is covered with an insulating layer with a via hole; a second conductive pattern is arranged in a position, corresponding to the position of the via hole, on the first conductive pattern; and the manufacturing method for the array substrate comprises the step of forming the second conductive pattern in the position, corresponding to the position of the via hole, on the first conductive pattern. By adoption of the array substrate and the manufacturing method therefor provided by the invention, the condition of incomplete exposure or photoresist residue at the bottom of the via hole can be reduced or avoided.

The invention provides a glue film, a preparation method of the glue film, a display device and a method for removing the glue film, and relates to the technical field of display. The removal difficulty of the glue film can be reduced, so that the glue film and a glued object can be effectively separated, and the problems of glue material residues and the like are avoided. The glue film comprisesa glue film body and deformed particles dispersed in the glue film body, wherein the volume of the deformed particles can be contracted. The method is used for removing the glue film.

The invention relates to the field of electric power laying tools, in particular to a pole erecting device for electric power laying and a use method of the pole erecting device. The pole erecting device comprises a base, a front bracket and a rear bracket are movably connected to the base, a vertical upward stand is fixed to the base, a lifting bracket for erecting a cement pole is connected with the stand in a threaded mode, a pull rod is connected at the upper end of the lifting bracket in a hinged mode, and a pole clamping mechanism is connected at the lower end of the pull rod in a hinged mode; and a first hoop frame is fixed on the pole clamping mechanism, which is movably connected with a second hoop frame, and a stop part is fixed on the second hoop frame. According to the pole erecting device for electric power laying and the use method of the pole erecting device, with rising operation of the cement pole, the time and the labor are saved, the labor intensity is reduced, no need for many people to participate in, control is convenient, and the difficulty of operation is reduced; and moreover, the cement pole can be clamped and erected through the pole clamping mechanism with a stop back function, thereby improving the stability and safety when the cement pole is erected, and the first hoop frame and the second hoop frame are convenient to remove from the erected cement pole.

The invention discloses a preparation method of a porous preform. The preparation method comprises the following steps of S100, stacking inorganic salt particles in a container with a closed bottom end to form an inorganic salt particle accumulation body; S200, enabling the inorganic salt particle accumulation body to have initial compactness in the container by adopting a compaction method; S300,applying a downward constant pressure of 1-10 MPa to the upper part of the inorganic salt particle accumulation body, heating the container filled with the inorganic salt particle accumulation body to 0.2-0.8 Tm at a heating rate of 5-20 DEG C, and carrying out heat preservation; and S400, keeping the temperature for 1-8 hours, so that the inorganic salt particles creep and deform. The inventionalso discloses a porous preform. The invention further discloses a preparation method of the foam metal. The invention further discloses the foam metal.

The invention belongs to the technical field of plant residual pesticide removal. The invention particularly discloses a method for removing pesticide residues from a ginseng extract. The method comprises the steps: dissolving, extracting, concentrating, purifying, concentrating and drying; a ginseng extract is extracted for at least six times by using 97% or more of an organic solvent, and pesticide residues are adsorbed by using resin for fine purification, so that the removal rate of the pesticide residues can reach 99.9% or more, the European standard and the American standard are met, theoperation is simple, the cost is low, and the control is easy. The ginseng crude extract is made into extractum during extraction, an upper organic layer is discharged after layering, loss of the ginseng extract is effectively reduced, the recovery rate is increased, and the recovery rate is 70% or above; 100% of organic solvent is added during dissolution for pre-removal, so that the extractioneffect is improved; organic solvent residues are effectively removed through two-step concentration. In addition, the organic solvent can be recycled after being extracted, so that time and reagent consumption cost are greatly saved.

The invention relates to the technical field of preparation of aluminum hydroxide micro-powder, in particular to a method for preparing aluminum hydroxide by adopting alumina rock as a raw material for cell grinding and water milling of seed crystals. The aluminum rock is activated by crushing, ball milling and microwave radiation. Leaching of aluminum oxide in the aluminum rock by a mixed acid isimproved; after sulfuric acid and nitric acid are mixed into the mixed acid, leaching treatment is performed, so that sulfuric acid leaches aluminum components, sulfate radicals and calcium components form calcium sulfate at the same time, and a process flow of adopting the aluminum rock as the raw material for treatment is shortened. The difficulty of removing calcium ions, magnesium ions, ironions and the like in the later period is lowered, so that the relative content of the aluminum components entering a leachate is relatively high. After sodium hydroxide is adopted for adjusting the pHvalue, cell grinding is conducted to obtain an aluminum hydroxide seed crystal pulp, and then the aluminum hydroxide seed crystal pulp is added into a solution containing sodium aluminate, then crystallized, decomposed and washed to obtain aluminum hydroxide micro-powder with the sodium content lower than 0.1% and the particle size of 0.5-8 microns.

The invention relates to a photocuring 3D printing manufacturing method of a high-porosity ceramic core, which comprises the following steps: adding graphene into inorganic powder taking aluminum oxide as a main body, uniformly mixing, and adding the mixture into photosensitive resin to obtain ceramic slurry; pouring the ceramic slurry into a photocuring 3D printer, and printing under an ultraviolet lamp curing condition to obtain a ceramic core biscuit; placing the ceramic core biscuit in a tubular furnace, and completing the degreasing process under the conditions of a certain heating rate, temperature and heat preservation time in the argon atmosphere; and transferring into a muffle furnace, and completing the removal and sintering process of the graphene under the conditions of certain heating rate, temperature and heat preservation time in an air atmosphere. According to the invention, graphene is introduced into the ceramic slurry and is removed in the heat treatment process, so that the porosity of the ceramic core is improved, the removal difficulty is reduced, and the removal process of the ceramic core is facilitated. The method can be applied to the field of production of alumina-based ceramic cores.

The invention relates to the technical field of rice processing, in particular to a method for processing rice. Through the control on the rice processing steps and environment parameters of rice, thebroken rice rate of the rice during unhusked rice processing to the rice is greatly improved, the steps needing to detect and control the water content in each process step is reduced, it is achievedthat the temperature and humidity of the transmission link are controlled in the process of transmission, so that cooling and the improvement of the tenacity of rice grains are achieved in the process of transmission, the fissure rate and the broken rice rate are reduced, and the integrality of the rice grains is improved.

The invention discloses a feed bulk raw material packaging bag damage detection device which comprises a hopper. A first conveying frame is installed at the bottom of one side of the hopper, a second conveying frame is installed on one side of the first conveying frame, a feeding frame is installed on one side of the second conveying frame, and a detection box is installed on one side of the feeding frame. A third conveying frame is installed at the bottom of one side of the detection box, material distribution baffles are welded to the two sides of the inner wall of the hopper, semicircular stop blocks are welded to the top ends of the material distribution baffles, a material bearing table is hinged to one side of the top end of the hopper, clamping air cylinders are installed on the two side edges of the top end of the material bearing table, and clamping jaws are installed at the push rod ends of the clamping air cylinders. During operation, manual operation is not needed, the automation degree is high, the detection difficulty of the bagged raw materials can be reduced, the detection efficiency of the bagged raw materials is improved, the bagged raw materials can be rapidly unloaded and stored, and the cost of detection and warehousing of the bagged raw materials can be reduced.

The invention discloses an SLM printing method and system capable of controlling deformation of a thin-wall structure. The printing method comprises the following steps: acquiring an initial three-dimensional model diagram of a workpiece to be printed to determine a thin-wall structure on the workpiece to be printed, wherein the thin-wall structure is provided with a first inner surface and a first outer surface; and generating a model of a support body according to the thin-wall structure, and guiding the model of the support body into an initial three-dimensional model diagram to obtain a three-dimensional model diagram of the workpiece to be printed with the support body, wherein the support body is provided with a second outer surface, the shape of the second outer surface is the sameas that of the first inner surface, gaps between the second outer surface and the first inner surface are uniformly distributed, the widths of the gaps are preset widths, and the wall thickness of thesupport body is greater than a second preset thickness. The SLM printing method and system have the beneficial effects that the non-contact support body is used for controlling the deformation of thethin-wall structure in the printing process, the technical problem that an existing contact support body and the thin-wall structure are difficult to separate is solved, and the removal difficulty ofthe support body is greatly reduced.

The present application discloses a filtration device for pulp, the filtration device for the pulp comprises a cylindrical filter cartridge which is disposed upright. A first filter net and a second filter net are obliquely arranged in the cylindrical filter cartridge, and the second filter net is located below the first filter net. The first filter net and the second filter net both include a high end and a low end, the low end of the first filter net is provided with a detachable first filter bag, the detachable first filter bag is matched with the first filter net in mesh diameter, the lowend of the second filter net is provided with a detachable second filter bag, and the detachable second filter bag is matched with the second filter net in the mesh diameter. A first sealing door anda second sealing door are arranged on the side wall of the cylindrical filter cartridge, a water pipe is also arranged on the top of the cylindrical filter cartridge, and one end of the water pipe penetrates through the first filter net and extends to above the second filter net. The water pipe is provided with rotating nozzles which are respectively located above the first filter net and betweenthe first filter net and the second filter net. Impurities are accumulated in the filter bags under the flushing of the rotary nozzles, the sealing doors are opened, and the filter bags are taken down, and the impurities are removed.

The invention discloses a method and a system for removing the mechanical impurities and ash contents in the coal tar whole fraction. The removing method comprises the following steps: step A, filtering to remove the impurities with the diameter of 20-50mu m in the coal tar whole fraction by a pressure filter to obtain a first effluent; step B, mixing the first effluent with the diesel fraction at a volume ratio of 1: (0.1-5) to obtain a mixed oil; and step C: filtering to remove the granules wrapped with the impurities with the diameter of 1-20mu m in the mixed oil by a pressure filter, wherein the effluent is a coal tar whole fraction free of mechanical impurities and ash contents. The removing system comprises a first pressure filter, a first mixing device and a second pressure filter which are in turn connected. By adopting the method, the removing difficulty of the small granular mechanical impurities and ash contents can be reduced, the removing rate is high and the device cannot be blocked; and simultaneously the removing system has the advantages of simple and easy operation, small occupying area, low cost, energy conservation and environmental protection.

The invention relates to the technical field of medical equipment, and discloses a bracket positioning frame and a manufacturing method of the bracket positioning frame. The bracket positioning frame is used for positioning a bracket and comprises a plurality of fixed frames and a support mechanism, wherein the fixed frames are arranged around the periphery of the bracket; the inner frame shapes of the fixed frames are matched with the outline shape of the bracket; the bracket is fixed in the fixed frames; the fixed frames are assembled on the support mechanism; the shape of the support mechanism is matched with the anatomical shape of the part, contacting the support mechanism, in an oral cavity of a patient; and the fixed frames correspond to teeth one by one. The bracket positioning frame can provide a very accurate bracket bonding position under the premise of not changing the traditional direct bonding habit of an orthodontist, and is simple to disassemble and assemble and low in cost. According to the manufacturing method of the bracket positioning frame, personalized customization of the bracket positioning frame can be conveniently carried out according to the dentition of the patient; the design and manufacturing processes are completely digitized; and the accuracy, the repeatability and the feasibility all are very ideal.

The invention relates to the field of agricultural machinery, and provides a threshing device used for a long-stem crop. The threshing device comprises a threshing component, a screening component anda material collection component, wherein the threshing component comprises a roller and a shell; the roller can be rotatably arranged in the shell; the excircle surface of the roller is provided witha first threshing device; the inner wall of the shell is provided with a second threshing device cooperated with the first threshing device; the lower side plate of the shell is provided with a material falling hole; the screening component is arranged on a position which is below the threshing component and corresponds to the material falling hole, and is used for filtering impurities in particles; and the material collection component is arranged below the screening component and is used for collecting the particles. By use of the threshing device provided by the invention, the successful removal, impurity removal and collection of the particles of long-stem crops, including Vicia villosa Roth and the like, can be effectively improved, the particle removal difficulty of the long-stem crops, including Vicia villosa Roth and the like, can be lowered, and removal and collection efficiency is improved. The threshing device is suitable for large agricultural machinery and is favorable for developing to a quick, efficient and mechanical direction.

The invention discloses a semiconductor structure and a forming method thereof, and the method comprises the steps: providing a substrate which comprises a first region and a second region; forming a low-K dielectric layer on the surface of the substrate; carrying out the etching of the low-K dielectric layers in the first and second regions, forming a plurality of openings at the low-K dielectric layer in the first region, and forming a plurality of grooves at the low-K dielectric layer of the second region; placing metal in the first openings and the grooves, forming two opposite plate electrodes of a plurality of capacitors at the low-K dielectric layer in the first region, and forming a plurality of interconnection structures at the low-K dielectric layer of the second region; removing the low-K dielectric layer between the two opposite plate electrodes in the first region, and forming a second opening between the two opposite plate electrodes; placing a high-K dielectric layer in the second opening, wherein the high-K dielectric layer serves as the dielectric material layer of a capacitor. The method achieves the integrated manufacturing of capacitors and interconnection structures in the low-K dielectric layers, and reduces the area of the capacitors.

The invention discloses a sealing assembly, for sealing a connecting part of a first structural member and a second structural member rotating relative to the first structural member. The sealing assembly comprises a sealing sleeve sleeved on the outside of the connecting part, a flexible sealing unit sleeved on the outside of the second structural member, and a spiral pushing unit connected to the outer peripheral wall of the second structure and located in the sealing space enclosed by the sealing sleeve, and used for pushing a material leaked into the sealing sleeve back into the first structural member and / or the second structural member. One end of the sealing sleeve is connected to the first structural member. One end, close to the connecting part, of the flexible sealing unit is connected to the other end of the sealing sleeve, and the other end away from the connecting part is gradually contracted to attach to the outer peripheral wall of the second structural member in the radial direction of the second structural member. The invention also discloses a rotary kiln and a sealing method. The sealing assembly can effectively improve the working environment, prolong the service life and improve the sealing effect.

A method of manufacturing a semiconductor device is disclosed, which can completely remove hard mask residues left along boundaries between a high-voltage device region and STI structures after a dry etch process, by partially reducing a thickness of each of the exposed portion of the respective STI structures adjacent to the high-voltage device region so as to sufficiently expose the residues. As a result, after a portion of an Underlying pad oxide corresponding to the high-voltage device region is removed in a subsequent process, the exposed surface of the substrate is uniform with a smooth and clear border. Therefore, no sharp corners will emerge at a border of a gate oxide subsequently grown on the exposed surface of the substrate, and the gate oxide is thus morphologically improved, thereby resulting in an improvement of the reliability of the high-voltage semiconductor device being fabricated.

The invention relates to a construction method of a comprehensive dewatering and draining system of a deep foundation pit. The construction method comprises the steps of (1) conducting construction preparation; (2) laying retaining wall intercepting and draining system; (3) constructing a cast-in-situ draining ditch; (4) laying a draining blind bitch; (5) laying a water collecting channel and (6)constructing a grouted sealing body in the channel. The construction method of the comprehensive dewatering and draining system of the deep foundation pit has the beneficial effects that a water bodydischarged out by wall side draining pipes is collected by means of side wall intercepting ditches, the water body is converged into ditch bottom settling ponds through connection water pipes, so thatthe influence of the water body on the stability of the foundation pit is lowered, and construction environment is protected; meanwhile, waist beam hanging boards and hanging board base boards are connected with built-in anchor plates preset in cross strut waist beams through hanging board connection bolts, a platform hanger rod and a ditch bottom support plate provide support for the side wall intercepting ditches, so that the layout difficulty of the support system is lowered, and the bearing capacity of the support system is improved; each wall side draining pipe is provided with rectangular or oval water seepage slotted holes, a pipe periphery inverted filter is arranged on the outer side of each wall side draining pipe, and therefore the possibility of clogging of the wall side draining pipes can be effectively lowered.