88results about How to "Safe and efficient construction" patented technology

The invention relates to a method for constructing an underground space by a shield-shallow buried covered excavation composite method, and belongs to the technical field of construction methods of the underground space. The construction method comprises the following steps of: constructing two or more shield tunnels in advance by a shield method; and excavating a soil body between the shield tunnels by a shallow buried covered excavation method. By the method, the construction of the underground space with a large cross section is safe and high-efficiency, a structure is definitely stressed, construction speed is high and construction cost is low. The method can be used for constructing large-scale underground spaces in various forms.

The invention relates to a method for mounting an inclined shaft internal pressure steel tube. The method comprises the steps of hoisting a hauling system, enabling a rail to slide downwards, enabling a trolley to slide downwards to complete a load test, conveying a tube coupling to be mounted of the pressure steel tube to a site, hoisting, unloading and turning over an upper slipway vehicle and a lower slipway vehicle by a winch hoisting system, tying the vehicles, connecting a gliding hauling system and the steel tube, removing a hoisting cable, enabling the hauling system to work, finishing gliding and humping of the tube coupling, unloading the tube coupling and enabling the lower slipway vehicle to reset. According to the method for mounting the inclined shaft internal pressure steel tube, a mathematical model calculation achievement which is established according to the mechanics principle is combined with a model test and a prototype test to demonstrate the feasibility of two-point towing gliding, a series of technical problems of optimizing of the structure of an anchor inside a cave chamber, rope jumping and nesting of a winch in the heavy loading process, selecting, calculating and demonstrating of a gliding towing point, designing of the structure of the trolley, synchronization balancing of double-traction, preventing abnormal abrasion of a steel wire rope of a multiplying power pulley block and gliding in-place unloading of the steel tube are solved comprehensively and systematically, and construction is safe and efficient.

The invention discloses a cylinder frame support type integral steel platform suitable for inclined wall construction and a construction method thereof, and relates to the technical field of buildingconstruction equipment. And aims at the problem that the current cylinder frame supporting type integral steel platform cannot be used for safe and efficient construction of an inclined wall body of acore cylinder shear wall. The device comprises a main frame body which comprises a steel platform, a supporting system and a climbing system, a branch frame body which comprises at least one inner cylinder frame support arranged between the inclined wall body to be poured and the main frame body, the top of the branch frame body connected with the bottom of the steel platform, the bottom beam ofthe branch frame body movably connected with the bottom beam of the main frame body, the bottom of the branch frame body provided with at least one hydraulic oil cylinder, the width of the branch frame body equal to or larger than the width of vertical projection of the inclined wall body to be poured; and a suspension anchor scaffold, which is installed on the outside of the core cylinder shear wall, the bottom of the suspension anchor scaffold connected with the bottom of the poured inclined wall body, and the top of the suspension anchor scaffold is connected with the end part of the top beam of the steel platform.

The invention aims at solving the problems in a well drilling process of a surface extraction goaf underlying coal-bed methane well of a coal mining area and provides an overmined-goaf coal-bed methane surface well drilling method according to requirements of an overmined-goaf well drilling technology. The method comprises the following specific steps: firstly, exploiting; drilling down to a surface soil layer for 10m by adopting a conventional well drilling method; carrying out well cementation through a sleeve and returning cement to the surface; secondly, constructing by adopting a nitrogengas well drilling manner when constructing to a 90m part of a goaf top plate; finishing drilling when drilling down to a coal bed bottom plate for 25m and carrying out the well cementation through technical sleeve; returning cement to a goaf coal bed bottom plate; thirdly, exploiting; finishing drilling when drilling down to a target layer for 40m by adopting a clean water drill carrying out thewell cementation through the sleeve; returning the cement to a part which is 100m above the goaf top plate. The overmined-goaf coal-bed methane surface well drilling methodis characterized in that overmined-goaf drilling of nitrogen gas can be realized and underground potential safety hazards can be eliminated; safe and efficient construction of overmined-goaf well drilling of coalmines is ensured.

The invention discloses a steel truss jacking device. The technical problems that steel truss large hoisting equipment in a whole building group is unable to use, difficult to assemble, difficult in assemble quality and safety control in the prior art are solved. The steel truss jacking device comprises a jacking seat and jacking frames. The jacking frames comprise lattice column standard sectionsmatched with the jacking seat and bearing seats used for connecting the lattice column standard sections and the steel truss. The jacking seat comprises a base and a jack arranged on the base, a lifting seat is arranged at the top end of the jack, and the lifting seat is connected with the lattice column standard sections through pull rods. The steel truss jacking device has practical functions and convenient operation, and can complete the construction of the steel truss in the whole building group efficiently and safely.

The invention discloses an underground engineering multi-stage complete control method. The problem that in the prior art, a surrounding rock control method is prone to initiating safety accidents issolved. The underground engineering multi-stage complete control method has the beneficial effects that underground surrounding rock under complex conditions can be effectively retained and protectedaccording to a multi-stage retaining and protecting method. According to the scheme, the underground engineering multi-stage complete control method comprises the steps that after underground engineering is excavated, the surrounding rock is subjected to comprehensive classification; according to a surrounding rock comprehensive classification result, a surrounding rock external loading model is established, and surrounding rock stability numerical simulation and retaining and protecting mechanical models of different retaining and protecting stages are established; surrounding rock deformation indexes and retaining and protecting force-wearing indexes are obtained according to the surrounding rock stability numerical simulation and retaining and protecting mechanical models, and an optimal design scheme of multi-stage retaining and protecting is chosen; after the optimal design scheme is applied on site, the surrounding rock control effect is estimated in real time; and according to areal-time estimation result of the surrounding rock control effect, the multi-stage complete control retaining and protecting design is dynamically optimized.

The invention belongs to the technical field of tunnel TBM construction and discloses a large-embedded-depth TBM construction tunnel rock burst treatment structure and method. The large-embedded-depth TBM construction tunnel rock burst treatment structure comprises a plurality of advance boreholes formed in the vault area of the working face of a tunnel. The advance boreholes penetrate through the rock burst area. All the advance boreholes are connected through fracture crushed zones formed through presplitting blasting in the boreholes. According to the large-embedded-depth TBM construction tunnel rock burst treatment structure and method, the positions and directions of the boreholes are reasonably arranged in the working face of the tunnel through the operation space in a TBM, the crushed zones of a rock body are formed in the vault and spandrel of the rock burst area through borehole blasting, high-pressure water injection is utilized for further promoting development of crushed zone fractures and softening the rock body, high ground stress in the rock burst area is released, the rock burst risk is eliminated, the whole construction process is safe, efficient, low in cost and good in treatment effect, subsequent borehole high-pressure grouting treatment can be conducted to improve the integrity of the crushed zone fractures of the rock body, the collapse quantity and backfilling quantity of the vault during subsequent TBM excavation are decreased, and remarkable economic and social benefits are achieved.

The invention discloses a deep mine hard rock roadway stress adsorption layer structured support method. In the initial stage after a deep roadway is excavated, concrete is sprayed to form a concrete flexible support layer. 4.5 m-5.0 m blastholes are drilled in the two sides of the roadway and an arch top, the spaces in the range of 2 m-2.5 m of the bottoms of the blastholes are filled with explosive for conducting soft fragmentation explosion to construct an arch broken rock stress adsorption layer. Grouting conduit anchor rods are driven in through the blastholes, cement paste is poured into the grouting conduit anchor rods to reconstruct structure support bodies. Paste is poured into the blastholes so as to fix the grouting conduit anchor rods, so that a rockburst prevention support structure formed by the arch broken rock stress adsorption layer, the structure support bodies, an isolation rock body, the concrete flexible support layer and the grouting conduit anchor rods of the high-stress deep hard rock roadway in a cooperative mode is achieved. Through the stress adsorption layer formed by the support technology, high stress and gathering of stress energy of surrounding rock of the isolation rock body can be effectively reduced, rockburst is restrained, and tunneling safety and efficient construction of the deep hard rock rockburst type roadway can be well achieved.

The invention relates to a water-based drilling fluid for shale gas wells and a production method thereof. The method sequentially includes the following steps of: (1) preparing the following raw materials: 1000 parts of water, 45-50 parts of sodium bentonite, 500 parts of a water-soluble inhibition weighting agent II; 100 parts of a water-soluble inhibition weighting agent III; 15-20 parts of aninhibiting and anti-collapse agent non-fluorescence white asphalt, 10-20 parts of solid polymeric alcohol, 10-20 parts of a filtrate reducer, 0.5-1 part of a polyamine inhibitor, 20-30 parts of ultrafine calcium carbonate, 10-25 parts of an extreme pressure lubricant, and 0.5-1 part of a coating inhibitor; (2) mixing the sodium bentonite and water, and performing curing for at least 24h at normaltemperature; and (3) adding the water-soluble inhibition weighting agent II and water-soluble inhibition weighting agent III under stirring, then adding the inhibiting and anti-collapse agent non-fluorescence white asphalt and the solid polymeric alcohol, then adding the filtrate reducer and the polyamine inhibitor, then adding the ultrafine calcium carbonate and the extreme pressure lubricant, finally adding the coating inhibitor, and then adjusting the pH value and density. The drilling fluid has the advantages of high plugging properties, strong inhibition and excellent lubricating properties, and can meet the safe drilling requirements of shale gas horizontal wells.

The invention discloses a construction method for single-construction-channel dual-line same direction and same platform subway stations. According to the plane position relation of every two adjacent subway stations, a main construction channel, construction subchannels and a construction communication channel of the two stations are determined, and station excavation and support are implemented through four steps: excavation of the main construction channels and the construction subchannels, the excavation sequence and switching of station connection sections, the excavation and support sequence of pilot tunnels in station bodies on the left line and the right line of each station, excavation and support of the communication channel, construction of secondary linings of the station bodies on the left line and the right line of each station, and release of core soil. By reasonably arranging the communication construction channel for every two adjacent stations, adjusting the spatial position relation between the construction channels and the stations, and setting the construction sequence of the communication channels and the subway stations, the working efficiency of the tunnel face is enlarged to a great extent, the transportation capacity of the main construction channels and the construction subchannels is brought into a full play, the construction period is remarkably shortened, and the project cost is lowered.

The invention discloses a tunnel gushing roof fall door closing treatment method. Accidents such as tunnel gushing roof fall door closing can be effectively dealt with timely, disaster loss can be reduced to the maximum extent and TBM construction is smoothly recovered. The tunnel gushing roof fall door closing treatment method mainly comprises the steps of emergency treatment of the ground surface, emergency treatment in a tunnel, permanent treatment of the ground surface, staged desilting of a gushing body, arrangement of a circuitous pilot tunnel and a high-position working chamber, treatment of a gushing roof fall breach, treatment of an influence range and the like. The tunnel gushing roof fall door closing treatment method is short in construction period, clear in construction organization, high in applicability and suitable for rapid construction and cost control of the TBM after the gushing roof fall door is closed.

The invention relates to a deep foundation pit support dismounting system. The deep foundation pit support dismounting system comprises a protective frame system, a sliding carrying support bracket system, an inner support steel tube stand column dismounting system and a frame column safety protective system, wherein the protective frame system comprises an integral type frame bottom plate, a scaffold support and tool type guard bars; the scaffold support is erected on the integral type frame bottom plate, and a section bar reinforcing top plate is arranged on the top of the scaffold support;split heads and lifting jacks are symmetrically distributed on the section bar reinforcing top plate; the tool type guard bars are mounted at the two sides of the section bar reinforcing top plate; the sliding carrying support bracket system comprises a horizontal moving slide plate, a traction system and a lifting system; a slide rail is arranged on the section bar reinforcing top plate; the horizontal moving slide plate with a slide wheel is mounted on the slide rail; and a dismounted supporting beam is arranged on the horizontal moving slide plate. The deep foundation pit support dismounting system has the beneficial effects that: foundation pit support dismounting adopts the integral lifting type protective frame system, the supporting beam slowly drops through the lifting jacks, the combined tool type guard bars replace the conventional supporting protective structure, and construction is safe and efficient.

The invention provides a method of adjacent buildings protection and tunnel foundation pit excavation in urban large section open excavation tunnel, which includes the following steps: 1) before the excavation of the tunnel foundation pit, a first isolation structure of a first predetermined length is arranged along the excavation direction of adjacent buildings in a soil layer between adjacent buildings and a preset position of the enclosure structure of foundation pit; 2) a second isolation structure of a second predetermined length is arranged at both sides of the preset position of the enclosure structure of foundation pit; 3) the enclosure structure of foundation pit is applied to the preset position of the enclosure structure of foundation pit; 4) a tunnel foundation pit is excavatedin section. The method of adjacent buildings protection and tunnel foundation pit excavation in urban large section open excavation tunnel has the advantages of safe and efficient construction, easyoperation, and easy application.

The invention discloses a surrounding rock deformation monitoring method and prediction method suitable for a double-shield TBM. The monitoring method mainly comprises three parts of advanced borehole measuring tube design and deformation monitoring based on a quasi-distributed FBG sensing principle, monitoring value correction based on construction process numerical simulation and inversion analysis, and surrounding rock convergence deformation numerical simulation analysis and advanced prediction based on monitoring inversion parameters. The monitoring method and the prediction method have the advantages that the quasi-distributed FBG advanced drilling measurement pipe is utilized, the problem that surrounding rock deformation of a double-shield TBM tunnel is difficult to monitor due to shield and segment shielding is effectively solved, displacement correction is conducted on an imaginary fixed point of the measurement pipe through refined numerical simulation, the creep constitutive parameters of surrounding rock are inverted according to monitoring data, and advanced prediction analysis of the convergence deformation of the surrounding rock is realized based on the numerical model, so that a guidance basis is provided for construction tunneling and support design of a tunnel, and safe and efficient construction of the double-shield TBM is ensured.

The invention discloses a solid acid blockage remover and a method for removing stratum blockage by using the solid acid blockage remover. The solid acid blocking remover comprises a prepad fluid anda main treatment fluid, wherein the prepad fluid comprises the following components in percentage by weight: 8-16% of solid acid, 0.5-1.5% of a corrosion inhibitor, 0.5-1.5% of a clay stabilizer, 0.5-1.5% of an iron ion stabilizer, 0.5-1.5% of a demulsification cleanup additive and the balance of water; wherein the main treatment liquid is prepared from 5%-10% of solid acid, 4%-8% of ammonium fluoride, 0.5%-1.5% of a corrosion inhibitor, 0.5%-1.5% of a clay stabilizer, 0.5%-1.5% of an iron ion stabilizer, 0.5%-1.5% of a demulsification cleanup additive and the balance of water. The solid acidserves as main acid, most of other treating agents are solid particles, and the defects that special equipment is needed for liquid acid transportation, and long-distance transportation is high in safety risk are overcome.

The invention relates to the technical field of scaffolds, in particular to a building scaffold supporting structure which comprises a base, the base comprises two symmetrically-arranged second bottom rods and two first bottom rods arranged at the two ends of the two second bottom rods respectively, and a supporting part is arranged at the top of the base. Each supporting part comprises a plurality of supporting rods which are vertically arranged and detachably connected in sequence, the opposite ends of the supporting rods at the top and the supporting rods at the bottom are connected with butt joint pieces, and partition plates are arranged in the centers of the interiors of the butt joint pieces; the scaffold is reasonable in structure and flexible to use, potential safety hazards are avoided, the safety, adaptability and operation convenience in use are improved, the stability of the scaffold is improved, the ground levelness can be detected, all the components cooperate with one another and support one another functionally, the scaffold structurally has different functions and effects at different stages, the versatility is high, and the scaffold is suitable for popularization and application. The structure is stable.

The invention relates to the technical field of bridge reinforcement, and concretely relates to a bridge lifting device, a bridge transformation system and a bridge transformation construction method.The method comprises the following steps that S1, a to-be-lifted bridge section is lifted through a lifting unit arranged at the lifting ends of two bridge lifting mechanisms and temporarily supported; S2, the two bridge lifting mechanisms are moved to the two sides of the next to-be-lifted bridge section till lifting and temporary supporting of all the bridge sections are completed; S3, two setsof semi-frame bodies are placed on the ground on the two sides of the lifted bridge section, and the lifting device is arranged above the two sets of semi-frame bodies; S4, the lifting device lifts the two sets of semi-frame bodies to the preset height and then moves to the installation position of a construction hanging bracket, and the two sets of semi-frame bodies are arranged on a pier in a sleeving mode after being spliced; and S5, connection between the lifting device and the semi-frame bodies is removed, and step S3 and step S4 are repeated to install the next construction hanging bracket. The problems that in the prior art, a hydraulic jack is adopted for pier heightening, the jacking stroke is limited, a specially-designed steel cushion block needs to be adopted, and the construction efficiency is low can be solved.

The invention discloses a CL thermal insulation system construction method, and belongs to the technical field of building construction. The method includes the steps that the customizing, decomposingand numbering of CL net rack plates is conducted; additional steel bars are mounted on the CL net rack plate; the CL net rack plate is installed, and the CL net rack plate is bound and fixed with fixing steel bars; a plurality of special cushion blocks are installed at the two sides of the CL net rack plate, and water and electricity pipelines are laid; a formwork used for concrete pouring is installed on the CL net rack plate, through-wall bolts are arranged on the formwork, and self-compacting concrete is matched in a trial mode; and self-compacting concrete is poured, the formwork is removed, and the concrete is maintained. According to the CL thermal insulation system construction method, the structure erecting work of a CL heat preservation system can be simply and rapidly completed,the construction process is simplified, cost is reduced, and stability and firmness are achieved; and the in-mold temperature and pouring points are controlled, the special cushion blocks are arranged at certain intervals, and the concrete pouring height difference between the two sides of the heat preservation plate is controlled, so that the situation that the CL net rack plate does not generate lateral displacement is guaranteed, the pouring requirement and pouring quality of the concrete are met, and the construction is safe and efficient.