254 results about "High stress" patented technology

The application discloses a transparent strengthened glass ceramic with high stress depth, which contains spinel crystals and zirconia crystals in a crystal phase of the strengthened glass ceramic, and does not contain Li-containing crystals; the strengthened glass ceramic has a compressive stress region extending from a surface thereof to a compression depth, a compressive stress layer depth DOL_0 of the strengthened glass ceramic is greater than or equal to 14% of a thickness of the strengthened glass ceramic, and a tensile stress line density of the strengthened glass ceramic is greater than or equal to 25000 MPa / mm. By introducing more Li ions and Na ions into a spinel glass ceramic component, the prepared transparent spinel glass ceramic can be chemically strengthened, a transparent strengthened glass ceramic with high CS, DOL_0, CT_AV and CT_LD is obtained, and the strengthened glass ceramic exhibits excellent drop resistance.

The invention relates to the technical field of coal mine safety mining, and discloses a coal mine roadway high-stress area unloading-to-suction danger relieving method which comprises the following steps: step 1, a pressure relief stage: drilling holes in a roadway high-stress area to form a pressure relief channel; 2, a transfer stage, wherein stress is transferred to the deep part of the coal rock mass through the layout of the drill holes; and (3) an energy absorption stage: an energy absorption device is installed in the drill hole, the device comprises an outer steel pipe, an internal high polymer material and a monitoring element, the diameter of the drill hole in the step (1) is 50-150mm, the depth of the drill hole is 5-20m, a one-time hole forming process is adopted for construction, and the drill hole is formed in a high stress concentration area which is 6-20m away from the surface of the roadway and is arranged at intervals in the axial direction of the roadway. By constructing a pressure relief-transfer-energy absorption three-stage synergistic effect system, the whole-process dynamic regulation and control of the surrounding rock stress of the roadway is realized, and the problem that the pressure relief effect is uncontrollable due to the fact that a stress transfer path is not clear in the prior art is effectively solved.

The invention discloses a manufacturing method for preventing a single-board guitar panel from recessing, and relates to the technical field of manufacturing for preventing the single-board guitar panel from recessing, and the method comprises the steps: carrying out the finite element stress simulation of a three-dimensional digital model of the single-board guitar panel, and determining a high-stress region in a stress state; according to the distribution characteristics of the high-stress area, generating a structure model of the bionic support network through topological optimization; preparing a lightweight support net with a bionic structure by adopting an additive manufacturing process based on the structure model; the method comprises the following steps: placing a to-be-processed veneer panel on a rigid mold with a preset curved surface, and carrying out plastic pre-deformation on the to-be-processed veneer panel under the action of vacuum negative pressure to obtain a pre-formed panel; a lightweight supporting net is fixed to a high-stress area on the inner side of the preformed panel; the modularized metal framework with preloaded stress is installed at a preset position in the guitar body to form a reverse acting force system which resists the downward sinking of the panel; and carrying out integral curing treatment on the guitar body provided with the supporting net and the metal framework to complete integrated manufacturing.

The application provides a chemically strengthened microcrystalline glass, a cover plate glass, an electronic device and a glass device, and belongs to the technical field of microcrystalline glass. The application makes the surface composition and stress structure of the chemically strengthened microcrystalline glass with lithium disilicate as the main crystal phase meet specific requirements, so that the chemically strengthened microcrystalline glass can meet high stress levels and also ensure good weather resistance, and can better ensure that the chemically strengthened microcrystalline glass meets application requirements.

The invention discloses an MEMS device and a preparation method thereof, and relates to the technical field of semiconductor devices. The MEMS device comprises a substrate layer, a stress matching layer and a doped polycrystalline silicon structure layer which are sequentially stacked from bottom to top, and the preparation method comprises the following steps: forming a sacrificial layer on the substrate layer, patterning the sacrificial layer, and defining anchor regions of the stress matching layer and the doped polycrystalline silicon structure layer; depositing a stress matching layer on the patterned sacrificial layer, wherein the stress matching layer is a silicon nitride-based composite film with stress increased from bottom to top in a gradient manner; depositing a doped polycrystalline silicon structure layer on the stress matching layer; and sequentially carrying out patterning treatment and anchor region annealing treatment on the doped polycrystalline silicon structure layer, and carrying out removal treatment and drying treatment on the sacrificial layer to prepare the MEMS device. The MEMS device prepared by the invention has the characteristics of high stress matching, uniform doping concentration and relatively good process compatibility.

This application belongs to the field of glass-ceramics technology, specifically relating to a glass-ceramic, a chemically strengthened glass-ceramic, and their applications. The glass-ceramic comprises a primary lithium disilicate crystalline phase and contains various oxides within specific ranges, with the composition, expressed as a molar percentage of each oxide in the glass-ceramic composition, satisfying the following: 2.00 ≤ SiO₂ / Li₂O ≤ 2.40. The glass-ceramic of this application exhibits high intrinsic strength and excellent optical properties, and can be chemically strengthened to produce a chemically strengthened glass-ceramic with high stress levels and excellent deformation resistance.

The invention discloses a tensile test device and method based on a pressing-to-pulling mode, and relates to the technical field of tensile tests. A tensile test method of a test piece under high temperature and high stress is realized, and the problems of stress concentration, difficulty in test piece preparation and the like in the existing tensile test are solved. The device comprises an axial loading mechanism, a confining pressure heating mechanism, a data acquisition mechanism and a control module, and the axial loading mechanism is connected with two ends of a test piece and is used for applying an axial load to the test piece; the confining pressure heating mechanism surrounds the periphery of the test piece and is used for applying circumferential pressure to the test piece and heating the test piece; the data acquisition mechanism is used for acquiring tension, temperature and deformation of the test piece under load; the signal output end of the control module is connected with the signal input ends of the axial loading mechanism and the confining pressure heating mechanism, and the control module is used for controlling starting and stopping of the axial loading mechanism and the confining pressure heating mechanism; the signal input end of the control module is connected with the signal output end of the data acquisition mechanism and used for receiving data acquired by the data acquisition mechanism.

The invention discloses a device and method for testing durability of a concrete structure in a deep complex environment, and the method is characterized in that a self-anchoring loading device enables two concrete members and a high-strength round bar to be pressed and fixed through bolts, so that the two concrete members are in a high-stress loading environment; the pressure sensor is used for measuring stress applied to the concrete member by the bolt; the self-anchoring loading device is placed in a high-strength pressure tank containing a corrosive solution, and the stray current recorder is used for enabling the two concrete members to be in a stray current environment; the air compressor is communicated with the high-strength pressure tank and is used for pressurizing the corrosive solution, so that the two concrete members are in a high-water-pressure environment; on the premise that erosion durability tests can be carried out on a plurality of samples at the same time, the environment where a deep concrete structure is located can be simulated through the coupling effect of high stress, stray current and high water pressure, and therefore the durability of the concrete structure in the deep complex environment can be accurately obtained.

The present application relates to the technical field of glass ceramics, and in particular, to a glass ceramic, a chemically strengthened glass ceramic, and uses thereof. The glass ceramic comprises lithium disilicate as a main crystal phase and has specific content ranges of oxides. On the basis of the content expressed as the molar percentage of each oxide in the composition of the glass ceramic, the composition of the glass ceramic satisfies 2.00≤SiO2 / Li2O≤2.40. The glass ceramic of the present application has high intrinsic strength and excellent optical performance, and can be chemically strengthened to obtain a chemically strengthened glass ceramic with high stress level and excellent deformation resistance.

The invention provides a cement-based composite grouting material and method for reinforcing deep broken surrounding rock, and belongs to the technical field of grouting materials. The high-performance cement-based composite material is prepared from the following components in parts by weight: 100 to 200 parts of a Portland cement matrix, 20 to 70 parts of a multi-element active mineral admixture, 5 to 30 parts of hollow glass beads, 0.2 to 4.0 parts of aluminum oxide powder, 0.1 to 0.4 part of powdery graphene oxide, 0.5 to 3.0 parts of a polycarboxylate superplasticizer and 60 to 100 parts of water. The problems that in deep broken surrounding rock reinforcement, a traditional cement-based grouting material is difficult to consider bearing capacity and dynamic disturbance resistance at the same time, performance is degraded at the high temperature, and all components are not dispersed are solved; the material has the characteristics of dynamic wave absorbing performance, high strength, excellent flow diffusivity, high temperature resistance and the like, and can effectively reinforce surrounding rocks in high-stress, high-ground-temperature and dynamic disturbance environments.

This film comprises an elastomer layer (11) on a base material (30), and the elastomer layer has a stress relaxation rate of 70% or more in at least one direction, as calculated using formula 1. [Formula 1] Stress relaxation rate (%) = (A-B) / A×100 Taking at least one direction as a length direction, the elastomer layer is cut to a length of 10 mm and a width of 30 mm to obtain a strip-shaped test piece. The strip-shaped test piece is pulled in the length direction at a tension speed of 200 mm / min in an environment of a temperature of 25°C and a relative humidity of 45% using a tensile tester, and pulling is stopped when an elongation of 50% is reached. The stress value of the elastomer layer is measured continuously from the start of pulling until 30 seconds after extension has stopped. Defining the stress value indicating the highest stress during the measurement time as "A" (N), and the stress value 30 seconds after extension has stopped as "B" (N), the stress relaxation rate (%) of the elastomer layer is calculated on the basis of formula 1.

The utility model provides a concrete filled steel tube arch frame semi-flange connection node structure. The concrete filled steel tube arch frame semi-flange connection node structure structurally comprises a concrete filled steel tube arch frame, a semi-flange plate connection part, a screw rod, a nut, a waterproof layer and CFRP fiber cloth, the half flange plate connecting part is a half flange plate provided with a groove, and the lower half part of the connecting joint of the outer steel pipe is placed in the groove of the half flange plate and is welded with the half flange plate; waterproof layers are laid on the outer side and the periphery of the top of the connecting joint, and the waterproof layers of the connecting joint and the half flange plate connecting part are integrally bundled through CFRP fiber cloth. According to the structure, the problem of stress concentration on the contact surface of a traditional full-flange connection structure and surrounding rock can be effectively solved while the advantages of a traditional flange connection node are reserved. In tunnel engineering under the high-stress surrounding rock condition, the node structure can adapt to the large-deformation working condition of the surrounding rock, and a good choice is provided for supporting design of the concrete-filled steel tube tunnel under the complex geological condition.

The utility model relates to the technical field of buildings, in particular to a module assembly type steel structure combination column and an assembly system, which comprises a steel pipe column, the steel pipe column consists of a plurality of steel frames, the steel frames are L-shaped or U-shaped, and an accommodating space is formed in the steel pipe column; the steel pipe column and the stirrup cage are combined, then the longitudinal load-bearing steel bars are inserted, cement is poured into the steel pipe column, the combined column is formed, and an independent module column of an original horizontal adjacent module is replaced with the combined column, so that the lateral force resistance of the structure can be improved, and the structure has higher stress performance; and the space occupied by the combination of a plurality of module columns is reduced.

The embodiment of the invention discloses a multi-stage collaborative supporting method and structure for an ultra-deep well large-span chamber, and the method comprises the following steps: firstly identifying an overlying key rock stratum and calculating a pressure relief range, carrying out'skylight opening 'excavation on the overlying key rock stratum of the large-span chamber to realize high stress transfer and pressure relief, and releasing pressure for the large-span chamber to be excavated. The cavern is in a low-stress state, and dynamic disasters such as rock burst and the like caused by cavern stress concentration or high-stress cavern large-deformation disasters are reduced; precise excavation is carried out to form a chamber, first-time supporting is carried out, high-pretightening-force yielding anchor cables are applied to a top plate and side parts, and a deep and shallow part cooperative bearing layer is formed through long anchor cables and short anchor cables; and then secondary supporting is carried out, loosening blasting pressure relief is carried out on the base angles, a high-strength concrete-filled steel tube support is erected, and the space between the high-strength concrete-filled steel tube support and the surrounding rock is filled with a yielding back plate. And then grouting anchor cables are constructed at the bottom corners to block stress transfer, and pressure relief drill holes are constructed in the top slope part to regulate and control the surrounding rock stress. And finally, an anti-slide pile is vertically arranged in the center of the bottom plate.

The invention relates to the technical field of ultra-clean HDPE (high-density polyethylene) barrels, and particularly discloses a multi-sealing anti-leakage structure of an ultra-clean HDPE barrel. The upper surface of the barrel body is communicated with a connecting pipe, and the tail end of the connecting pipe is provided with a pressure balancing assembly used for balancing the pressure in the barrel. By means of the arranged pressure balancing assembly, high-pressure gas can push a sealing block to move vertically through a fixing plate on an exhaust part, the gas is exhausted through a gap between the sealing block and the exhaust part and is exhausted to the outside through a through hole in the exhaust part, the automatic pressure relief effect is achieved, and when an adjusting screw is screwed, under the cooperation of a fixing bearing, the sealing block is not prone to falling off. The adjusting part can be driven to move in the vertical direction, the distance between the guide sleeve and the sealing block can be adjusted, then the tension of the compression spring is adjusted, when the pressure of the barrel body is small, the pressure cannot be exhausted through the exhaust part, the sealing block can only be pushed through large pressure, and then automatic pressure relief of different materials can be conveniently achieved.

The utility model relates to the technical field of waterproof rubber jackets, in particular to a high-temperature waterproof rubber jacket with excellent weather resistance, which comprises a rubber jacket body, a mounting hole is formed in the middle of the rubber jacket body in a penetrating manner, a threaded mounting groove is formed in the inner wall of the mounting hole, staggered ribs are arranged on the inner wall of the rubber jacket body, and the threaded mounting groove is communicated with the staggered ribs. The staggered ribs are arranged on the inner wall of the rubber sleeve body in a grid-shaped staggered mode, and the inner walls of the two sides, close to the mounting hole, of the rubber sleeve body are fixedly connected with annular ribs. When the waterproof rubber sleeve is subjected to internal and external pressure, the staggered ribs and the annular ribs arranged in the waterproof rubber sleeve can provide relatively strong supporting force for the interior of the waterproof rubber sleeve, effectively disperse stress, avoid local stress concentration and increase the overall rigidity of the structure, and the reinforcing ribs are used for supporting the connecting part and the high-stress bearing area of the waterproof rubber sleeve, so that the waterproof rubber sleeve is not prone to deformation. The risk of breakage of the waterproof rubber sleeve is reduced, the weather resistance of the waterproof rubber sleeve is improved, the rigidity is improved, and deformation of materials is reduced.

The application provides a heat absorption tower structure system of a tower type photo-thermal power station, which comprises a heat absorber, a concrete cylinder, a vertical cylinder, a steel frame, a reinforcing mechanism, a first connecting mechanism and a second connecting mechanism. The vertical cylinder is arranged in the cavity of the concrete cylinder and partially extends out of the concrete cylinder, the steel frame is arranged above the concrete cylinder and surrounds the outside of the vertical cylinder, and the heat absorber is arranged on the steel frame. The reinforcing mechanism is connected between the concrete cylinder and the steel frame to limit the movement of the steel frame relative to the concrete cylinder, thereby realizing the vertical conversion of the steel-concrete structure. The first connecting mechanism fixedly connects the concrete cylinder and the vertical cylinder to form a rigid horizontal connection of the lower tower body. The second connecting mechanism connects the steel frame and the vertical cylinder and allows the relative horizontal displacement of the two within a preset range. The heat absorption tower structure system has high stress synergy and deformation coordination capability, can reduce the construction cost, and meets the requirements of high reliability, light weight and stable support of the heat absorption tower of the tower type photo-thermal power station.

The invention relates to the field of extrusion dies, and discloses a homogenization-free aluminum bar extrusion die which comprises a die body, a gear ring is rotatably mounted on the die body, a polishing mechanism is fixedly mounted on the gear ring, and the polishing mechanism extrudes an aluminum bar discharged from the die body; a pressurizing mechanism is meshed with the gear ring, controls the grinding mechanism to rotate around the aluminum bar and cleans the grinding position of the grinding mechanism; an adjusting mechanism is fixedly mounted at the top of the pressurizing mechanism, and the adjusting mechanism changes the cleaning angle of the pressurizing mechanism to the aluminum bar in the process that the polishing mechanism rotates around the aluminum bar; the cambered surface polishing block can eliminate tiny protrusions and smooth burrs on the surface of the aluminum bar through flexible extrusion, and damage to a base body due to excessive polishing is avoided; the sharp-corner polishing block effectively removes stubborn protruding flaws by means of the high stress concentration characteristic, and the cleaning effect of the polishing block on the aluminum bar can be controlled by controlling the compression amount of the first spring.

The application discloses a kind of thermoplastic composite continuous forming methods.The system includes successively in the direction of material travel: multiple roll unwinding mechanism, flattening arrangement, continuous mould pressing device and double steel belt presser.Wherein, continuous mould pressing device is made of multiple independent presser module, for applying 5-15MPa high pressure to realize the sufficient impregnation of resin to fiber;Double steel belt presser follows immediately, for applying 1-3MPa low pressure to eliminate surface indentation generated in mould pressing process.The application is by high pressure impregnation and low pressure finishing function clear distinction and collaborative use, overcome the technical contradiction that impregnation quality and surface quality are difficult to obtain in prior art, both ensure the excellent internal impregnation quality of composite material, also obtain high surface flatness, realize the continuous production of high-quality thermoplastic composite plate.

The application discloses an alloy material resistant to acid and alkali corrosion and a preparation method and products thereof, and the alloy material is composed of 20.5-21.0 wt% Cr, 6.0-6.5 wt% Mo, 17.5-18.5 wt% Ni, 0.18-0.22 wt% N, 0.8-1.2 wt% Cu, 0.05-0.1 wt% Ce, ≤0.02 wt% C and the balance of Fe and inevitable impurities. Through multidirectional synergistic design, the core requirements of excellent corrosion resistance, high strength and long service life under strong acid / alkali and high stress working conditions are realized, and the alloy material is particularly suitable for precision ball screw support bearings in harsh environments such as semiconductor cleaning equipment.

The present invention relates to safe strengthened glass with a low-variation-amplitude tensile stress region, a preparation method and an application. The change curve of the compressive stress and tensile stress of the strengthened glass meets a specific function relationship; within the range of 0.45-0.85 mm, the stress distribution meets the following condition: the stress curve is within the following Log-PI function range, the upper limit Fmax of the compressive stress meets the formula (1): Fmax=b+(2*a / PI)*(w / (4*(x−c){circumflex over ( )}2+w{circumflex over ( )}2)), and the lower limit Fmin of the compressive stress meets the formula (2): Fmin=b+(2*a / PI)*(w / (4*(x−c){circumflex over ( )}2+w{circumflex over ( )}2)); or the chemically strengthened glass comprises a first stress region and a second stress region, wherein the stress range of a first subregion in the first stress region includes that the minimum value of the stress difference value of the glass thickness t in the region of 0-10 micrometers is greater than 1 Mpa; and the pressure difference value of the second stress region is smaller than that of the first stress region. The deep compressive stress region of the strengthened glass has relatively high stress, and the tensile stress region has very-low-degree variation amplitude, so that the glass has excellent mechanical strength, very high stability and very high safety.

In one or more embodiments, a chemically strengthened glass-based article includes a first major surface and an opposing second major surface defining a thickness t of the glass article; a stress profile [sigma] (x) extending through the thickness t of the glass article; a first compressive stress layer extending to a first depth DOC1 of greater than about 0.15 t; a second compressive stress layer extending from the second major surface to a second depth of compression DOC2 less than or equal to DOC1; and a central tension zone positioned between the first compressive stress layer and the second compressive stress layer and including a peak tension PT and a tension zone width BTZ spanning DOC1 to tDOC2. In an embodiment, the following criteria are satisfied: wherein DOC = DOC1 and is the slope of the stress profile sigma (x) at DOC; ; and wherein TA is the tension area, defined as follows.

The invention discloses a surface paint spraying device based on constructional engineering channel steel formwork machining, and relates to the technical field of paint spraying equipment, the surface paint spraying device comprises a base, a material bearing mechanism is fixedly mounted at the upper end of the base, and a paint spraying displacement mechanism located on the outer side of the material bearing mechanism is further fixedly mounted at the upper end of the base; a protrusion detection feedback mechanism is fixedly arranged on the lower side of the moving end of the paint spraying displacement mechanism, and protrusions on the surface of the channel steel formwork are detected in advance so as to be prevented from affecting the paint adhesion stability and the paint spraying forming quality. Meanwhile, the moving speed of a paint spraying displacement mechanism can be automatically adjusted based on the surface roughness of the template (the larger the roughness is, the smaller the spraying thickness is, the smoother the surface is, the larger the spraying thickness is), and the paint spraying pressure and distance (the pressure of the high-roughness surface is automatically improved to ensure that paint permeates and sinks, the distance is shortened and the accumulation capacity is enhanced); and the paint spraying quality of the channel steel formwork is effectively guaranteed.

The utility model relates to an anti-seepage mold demolding base. The anti-seepage mold demolding base comprises a lower base body and a supporting piece placed on the lower base body. The supporting piece comprises a plurality of vertically-arranged supporting pipes and connecting rods for connecting the adjacent supporting pipes. The number of the supporting pipes is three. The whole supporting piece is of a regular triangle structure. The supporting pipe is provided with a supporting end surface for supporting the bottom of the test piece sleeve and a limiting lug which is propped against the outer peripheral surface of a mounting convex ring of the test piece sleeve; the limiting protruding piece and the supporting pipe are integrally formed, the limiting protruding piece is an arc-shaped protruding piece, and the two sides of the limiting protruding piece are each provided with an abutting side edge abutting against the installation protruding ring. The pressure machine has the effect of improving the safety of pressing the concrete test block from the test piece sleeve by the pressure machine.

The utility model relates to the technical field of abrasive paper, in particular to super-flexible waterproof abrasive paper which comprises a winding roller, an abrasive paper assembly is wound on the winding roller, a cylindrical connecting rod is fixedly installed at one end of the winding roller, and a hanging ring is fixedly installed at one end of the connecting rod. The flexible base material layer is used for providing the flexibility and durability of the abrasive paper, it is ensured that the abrasive paper is not prone to being torn or broken in the bending and twisting process, the anti-tearing layer is used for enhancing the tearing resistance of the abrasive paper, breaking under the high stress condition is prevented, and the durability of the abrasive paper is ensured; the method is used for preventing moisture from permeating into the abrasive paper, keeping the internal layer structure dry and stable and protecting the integrity of the bonding layer and the flexible base material layer.

The application belongs to the technical field of metal wear-resistant materials, and particularly relates to a wear-resistant alloy dual-phase steel lining plate for a semi-autogenous mill and a manufacturing method thereof, the manufacturing method comprising molding, smelting, casting and magnetic field assisted targeted heat treatment. The application guarantees uniform proportion of bainite-martensite dual phase by optimizing alloy components, matching air cooling + fog cooling precise temperature control phase change window; the application maximizes purification and refining effect by using rare earth cored wire wire feeding to inhibit burning loss and promote uniform distribution; the application uses strong magnetic field to promote nucleation and weak magnetic field to guide growth, and manufactures dual-phase structure steel lining plate with 45%-55% lath bainite, 40%-50% acicular martensite and 3%-5% residual austenite, the hardness of which reaches HRC50-55, the tensile strength is 1520-1530 MPa, the impact toughness is good, the wear rate is low, the interface bonding strength is greater than or equal to 850 MPa, and the dual-phase structure steel lining plate has high reliability and durability in high stress and high wear environment.

This invention discloses a pressure-induced heating composite material, comprising: a flexible support layer, which is a PI film; a first triboelectric material layer, which is a CNT-OH / PVDF-HFP composite film, attached to one side of the flexible support layer; a second triboelectric material layer, which is an AgNW / PDMS composite film, attached to the other side of the flexible support layer; a pyramidal microstructure is constructed on the surface of the second triboelectric material layer; and a thermoelectric conversion layer, attached to either the first or second triboelectric material layer. The thermoelectric conversion layer is prepared by combining Bi2Te3 / Sb2Te3 heterojunction nanosheets, PEDOT:PSS hydrogel, and Ti3C2TxMXene, with each component being doped with each other to form a uniform dot-like spatial distribution structure. The material of this invention exhibits high response under low pressure because the pyramidal microstructure increases the contact area change rate by 400% under low pressure (≤5kPa) and achieves a charge density of 1.2–1.5 mC / m², breaking through the high-pressure triggering bottleneck of existing materials.

The invention discloses a grid side wall imaging method. The method comprises the steps that a semiconductor structure which has a grid and a first side wall which covers the side wall of the grid is provided; a polycrystalline carbon layer is prepared to cover the surface of the semiconductor structure; the polycrystalline carbon layer is partially removed, so that a second side wall of the grid is formed on the surface of the first side wall; after a source drain implantation process is carried out on the semiconductor structure, the second side wall is removed; and a source drain annealing technology is continued. According to the grid side wall imaging method provided by the invention, through oxygenated plasma treatment, a polycrystalline carbon side wall which is used as a main side wall can be neatly removed; without using an SPT process which needs to be carried out in a specific etching cavity, the problem of void in a high stress through hole etching stop layer process can be solved; a process flow is simplified; and the production cost is reduced.

The present invention discloses a tunnel surrounding rock control technology and construction method for supporting a soft rock tunnel before excavation, comprising the following construction steps: S1, designing the spiral radius of an elastic ring support (1) according to the tunnel cross-sectional dimensions, surrounding rock properties, ground stress, elastic-plastic influence zone of the tunnel surrounding rock, and mechanical characteristics of the elastic support, determining the length of the elastic ring support (1) along the preset tunnel strike, whether grouting treatment is required, fixing the anchor length, and arranging the position; S2, performing spiral drilling in a predetermined direction on site using a drilling rig (11) and navigation equipment, and reaching a designated bottom plate; the tunnel surrounding rock control technology and construction method for supporting a soft rock tunnel before excavation of the present invention can be applied not only to soft rock tunnel support, but also to reinforced support of mine tunnels under deep complex geological conditions and high stress environments, as well as reinforced support of deep-sea tunnels and deep underground tunnels, reinforced support of tunnels under surface water bodies, and reinforced support of military underground tunnels.