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837results about "Shaft lining" patented technology
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Negative angle top caving along void self-boring method
The present application belongs to the field of coal mine roadway construction, and particularly relates to a method for self-forming a roadway by top cutting at a negative angle. The method comprises the following steps: drilling a field in front of a working face and close to a right side of a mining roadway; drilling anchor holes and top cutting holes along a strike and staggered construction, and installing grouting anchor cables in the field; cutting the basic roof and the immediate roof at a negative angle through the top cutting holes at the back of the working face, constructing a roadway-side gangue retaining structure, grouting through the grouting anchor cables and anchoring the grouting anchor cables on the roadway-side gangue retaining structure; and monitoring the deformation of the steel mesh at the grouting anchor cable and adjusting through a nut. The present application can ensure that the construction position of the roadway-side gangue retaining structure does not affect the width of the self-supporting roadway and the integrity of the roof by constructing a field of a certain width in advance. The negative angle top cutting holes can cut a section that is deviated to the direction of the goaf, so that the gangue formed by the collapse of the immediate roof moves to the direction of the goaf and does not move to the mining roadway in large quantities, thereby ensuring the safety of the construction in the mining roadway.
Owner:TAIYUAN UNIVERSITY OF TECHNOLOGY
A U-shaped arch structure with adjustable span and height
The application discloses a U-shaped arch structure with adjustable span and height applied to the field of tunnels, which is convenient to disassemble, transport and install through adjustable connecting pieces, fixed connecting pieces and a center hinged piece, improves the flexibility of the deployment of the U-shaped arch, realizes the height adjustment of arch support leg rods through the adjustable connecting pieces, is convenient to quickly adjust the span of the arch through the center hinged piece with a threaded cylinder and a screw rod, further improves the adaptability of the arch to different use scenarios, realizes accurate adjustment through a pointer disc and a scale disc, and through friction plates one and two arranged on the pointer disc and the scale disc respectively and the extrusion of a nut, load transmission between a hinged shaft and a side wing plate is realized through the friction plates one and two, stress concentration of the center hinged piece on the threaded cylinder and the screw rod when being stressed is avoided, and the structural stability of the center hinged piece and the arch is improved.
Owner:ZHEJIANG BONLY ELEVATOR GUIDE RAIL MFG
Hydraulic composition
To provide a hydraulic composition in which the integrated calorific value of hydration associated with the curing reaction during, for example, 20 hours from the preparation of the hydraulic composition is large even when fine aggregates having a high surface water ratio are used, a method for producing the same and a wet spraying method using the hydraulic composition.SOLUTION: There is provided a hydraulic composition which comprises (A) cement, (B) fine aggregates having a surface water ratio of 0.1% or more and 10% or less, (C) a polyalkylene oxide having a weight average molecular weight of 200000 or more and less than 1000000 and (D) water.SELECTED DRAWING: None
Owner:KAO CORP
An assembled shield segment structure
The utility model relates to shield segment technology field, and disclose a kind of assembled shield segment structure, first segment is provided with first outer piece and first inner piece, and first outer piece and first inner piece are fixedly connected with first connecting block and second connecting block between, second segment is provided with second outer piece and second inner piece, and second outer piece and second inner piece are fixedly connected with several third connecting blocks between, and the center position of third connecting block, first connecting block and second connecting block is movably connected with locking rod, through the first connecting block, second connecting block, third connecting block and locking rod of being set, the splicing position of adjacent first segment and second segment can be locked and positioned quickly, and first connecting block, second connecting block, third connecting can increase the support intensity of splicing, and through the plug of first connecting block setting and the slot of second connecting block setting, it is convenient for segment longitudinal plug-in positioning, improve assembly convenience.
Owner:ZHEJIANG YUHONG CONSTRUCTION ENGINEERING CO LTD +1
Detachable combined steel support for tunnel construction
ActiveCN224326292Uimprove securityavoid deformationUnderground chambersTunnel liningArchitectural engineeringScrew thread
The utility model relates to steel support technical field, and disclose a detachable combined steel support for tunnel construction, including support plate mechanism, still include: support mechanism and pressure regulating mechanism, the bottom of support plate mechanism and the top of pressure regulating mechanism swing joint, the bottom of pressure regulating mechanism and the top of support mechanism fixed connection, the utility model discloses through the support plate mechanism top close -fit in tunnel top, and make adjacent support plate main body splice together, place support mechanism in suitable position, and make splicing post align splicing seat, rotate threaded shaft and drive telescopic column along the inner wall of stand to move upwards through thread, make splicing post insert splicing seat inside, the top board is immobile, telescopic column continues to push base to move upwards, make pressure spring contract, and make pressure spring contract certain distance, produce constant pressure to the top board to the utility model discloses, thereby make support plate mechanism to the pressure of tunnel top in fixed value support, be favorable to the security of steel support.
Owner:SICHUAN ROAD & BRIDGE CONSTRUCTION GROUP CO LTD
Deeply buried large chamber supporting device and supporting method
The application relates to the technical field of chamber supporting, in particular to a deep-buried large chamber supporting device and a supporting method, which comprises a mountain-shaped steel belt, a bidirectional tray and a supporting device; spherical structures are arranged at the two ends of the mountain-shaped steel belt, and at least three groups of steel belt ribs are arranged at the upper end of the mountain-shaped steel belt; the bidirectional tray comprises an upper tray and a lower tray, the upper tray and the lower tray are connected through a steel plate, and an anchor hole is arranged at the steel plate connection; the spherical structures at the two ends of the mountain-shaped steel belt are respectively inserted into the connecting gaps of the upper tray and the lower tray of the bidirectional tray, an anchor rod or an anchor cable is fixed to the upper rock mass of the chamber by being inserted into the anchor hole of the bidirectional tray, and the mountain-shaped steel belt is supported through the supporting device. Compared with the prior art, the outer exposed ribs of the mountain-shaped steel belt increase the self-bearing capacity of the mountain-shaped steel belt, the span of the mountain-shaped steel belt is reduced through the middle supporting rod, and the stability of the supporting structure is improved.
Owner:SHEN KAN QINHUANGDAO GENERAL ENG DESIGN & RES INST CORP MCC
A tunnel crack repair material containing a modified marine silt carrier and a method of preparation
This invention belongs to the field of tunnel engineering materials technology, and specifically relates to a tunnel crack repair material containing modified marine silt carrier and its preparation method. The tunnel crack repair material prepared by this invention consists of ultrafine cement, anti-shrinkage self-healing components, polymer emulsion, anti-corrosion components, quick-setting stabilizer, high-efficiency water-reducing agent, penetration promoter, and water. It constructs an integrated repair system of "self-healing - anti-shrinkage - high adhesion - erosion resistance," realizing the resource utilization of marine silt solid waste. The material has a 7-day self-healing efficiency ≥90%, a retention rate ≥98% under 0.8 MPa flowing water pressure, a 28-day compressive strength ≥48 MPa, and an interfacial bonding strength ≥3.8 MPa. It can resist corrosive ion erosion and freeze-thaw cycles, and is suitable for waterproofing, reinforcement, and long-term repair of various cracks in underground engineering projects such as subway tunnels and highway tunnels under high groundwater levels and freeze-thaw cycles. It is not prone to re-cracking after repair and has strong construction adaptability.
Owner:JINAN RAILWAY TRANSPORT GRP CO LTD +2
A waterproof rubber capsule for a tunnel portal adapted to construction error of a sudden structure
The application provides a hole waterproof rubber capsule adapting to construction error of structure mutation, which comprises a rubber capsule accommodated in a steel tank when not pressurized and tightly engaged with the outer contour of a jacking pipe after swelling, the rubber capsule is communicated with a pressurizing pipe, the steel tank is arranged on the end wall of a working well, a pre-buried ring frame is arranged in the end wall, the steel tank and the rubber capsule are arranged around the outer contour of the jacking pipe, the wall thickness of the rubber capsule is uniform at the smooth structure of the jacking pipe, at the sharp corner of the jacking pipe structure or the sharp corner of the pre-buried ring frame, the capsule wall of the rubber capsule is processed into a flying wing structure which can be connected with the sharp corner after swelling according to the shape of the sharp corner. The flying wing type capsule wall of the rubber capsule has corresponding ductility and wear resistance, the size of the flying wing meets the construction error requirement, the wing corner can be pushed to the structure mutation position under the condition of error working condition with the pressurization of the rubber capsule and the ductility of the capsule wall, the waterproof gap is filled, so that the wing corner and the wing surface can match the structure contour within a certain error range.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP CO LTD
Method for coordinated unloading, support, and filling of roadways along the goaf in steeply inclined fully mechanized coal seams
ActiveCN119878164BLarge operating spaceImproved stress distribution characteristicsUnderground chambersUnderground miningLongwall miningMining engineering
This invention discloses a method for coordinated unloading-support-filling roadway protection in a longwall mining face of a steeply inclined coal seam. The method includes: arranging pre-reinforcing anchor bolts and cables at certain intervals in the transport roadway to reinforce the transport roadway in advance; pre-excavating a gap in the upper side of the transport roadway by blasting, and adding reinforcing anchor bolts and cables to the cross-section of the pre-excavated gap; arranging pressure-relief boreholes at certain intervals in the center of the coal seam roof at the pre-excavated gap, and implementing pressure-relief blasting after the support is moved; using I-beams and retractable modular roadway protection supports as the first and second layers of rock-blocking support, respectively; filling and sealing the goaf area above and on the sides of the retractable modular roadway protection supports with local filling materials; and arranging single hydraulic props for delayed support at a certain distance from the coal wall of the lagging face inside the roadway along the goaf. This method provides good support, significantly increases the speed of roadway retention in a longwall mining face of a steeply inclined coal seam, and effectively ensures safe and normal production.
Owner:XIAN UNIV OF SCI & TECH
Dual-detection-based trolley crack prevention control methods, systems, media, and products
This application provides a method, system, medium, and product for preventing concrete cracking on a trolley based on dual detection. In this method, a control processing unit acquires a first real-time distance value from a non-contact displacement sensor and the cylinder extension amount from a displacement sensor built into the lifting cylinder. Then, the control processing unit converts the cylinder extension amount into a second real-time distance value and calculates the deviation between the two real-time distance values. When the deviation does not exceed a deviation threshold, the first real-time distance value is used as the current distance value to ensure detection accuracy. When the deviation exceeds the deviation threshold, the two real-time distance values are fused to obtain the current distance value, improving data reliability. Finally, when the current distance value is lower than a risk distance threshold, the lifting cylinder is controlled to descend and retract, and the trolley is locked. The lock is released for precise positioning only after the operator issues an operation command. This method alleviates the technical problem of lag in manual control in noisy environments and reduces the possibility of concrete cracking accidents.
Owner:成都天维恒创智能科技有限公司
Tunnel lining bias active correction equipment and sensing and control system
The application provides a tunnel lining bias active correction equipment and a sensing regulation system, which is used for realizing bias correction of a lining and has the following characteristics: a correction unit and a bias correction box, wherein the correction unit is used for correcting a bias state of the lining and comprises an anchor rod, a stress adjusting bolt, an internal thread sleeve, an adjusting roller, a fixed roller and a steel cable; the anchor rod is arranged in surrounding rock and is used for providing a pulling resistance; the internal thread sleeve is arranged in the lining; the stress adjusting bolt is threadedly connected with the internal thread sleeve; the adjusting roller is rotatably arranged on a side of the stress adjusting bolt close to the surrounding rock and can move axially along with the stress adjusting bolt; the fixed roller is fixedly arranged on a side of the anchor rod close to the lining; and the steel cable passes through the adjusting roller and the fixed roller in sequence and passes through the correction unit, so that the steel cable actively applies additional compressive stress or additional tensile stress to the lining by matching the stress adjusting bolt and the anchor rod, and an active reverse bending moment is generated to offset harmful stress generated by the bias of the lining.
Owner:TONGJI UNIV
A straight wall section tunnel connection plate-free integral arch construction method
The application provides a straight wall section tunnel connection plate-free integral arch construction method, and belongs to the technical field of arch construction. The application implements bidirectional limiting and accurate positioning of the integral connection plate-free new arch by arranging a prefabricated positioning jig frame on the inner wall of the full-section floor inverted arch protection arch. The short stiffening rib is pre-welded according to the local stability prediction scheme of the I-beam web to eliminate the web buckling hidden danger. The segmented symmetrical jump welding process is adopted to complete the welding of the channel steel connecting rib, and the accumulated torsion angle of the integral connection plate-free new arch is controlled within 0.5°. The thin layer spraying process is adopted to complete the initial support sprayed concrete, and the residual cavity is filled with cement-water glass double-liquid slurry by supplementing injection through the reserved injection short pipe. The technical problem that the positioning accuracy and the structural overall stability of the straight wall section tunnel connection plate-free integral arch cannot be guaranteed due to the lack of lateral constraint in the installation process is solved.
Owner:CHINA CONSTR SECOND ENG BUREAU LTD
An inverted arch block transfer device for use in a tunnel
The present application relates to the technical field of open TBM construction, and discloses a inverted arch block transfer device in a tunnel, which comprises a power system, a hydraulic transmission system, a running system, a steering system, a braking system, a hoisting system and a portal, the portal comprises a horizontal frame at the top and two vertical frames on both sides of the horizontal frame, the horizontal frame and the vertical frame are perpendicular to each other, the vertical frame is fixedly connected by two column beams and a plurality of horizontal beams, the hoisting system comprises a hoist device, a translation device and a hoisting clamp, the translation device comprises a translation plate assembly and a translation driving device for driving the translation plate assembly to move, the hoisting and translation of the inverted arch block are realized, so that the transfer and transportation of the inverted arch block are easily realized, the automatic clamp and the hoisting system are matched with each other, the automatic clamp quickly completes the clamping of the inverted arch block, and then the hoisting system is matched to realize the rapid transfer, and the transfer time of the inverted arch block can be greatly shortened.
Owner:CCCC SHEC DONGMENG ENG CO LTD
A large-tonnage shield segment hoisting sling and a construction method thereof
This invention relates to the field of shield tunnel segment hoisting technology, specifically disclosing a large-tonnage shield tunnel segment hoisting device and its construction method, including an upper lifting beam, a horizontal frame, a left clamping plate, and a right clamping plate. The upper lifting beam is equipped with lifting lugs, and inclined left and right sliding grooves are symmetrically arranged at both ends of the upper lifting beam, with the upper distance between the left and right sliding grooves greater than the lower distance. A horizontal track is provided on the horizontal frame, a first sliding structure is installed on the left clamping plate, and a second sliding structure is installed on the right clamping plate. The left clamping plate is slidably connected to the left sliding groove, and the right clamping plate is slidably connected to the right sliding groove. In this invention, the upper lifting beam is connected to the hoisting device via steel wire ropes, and the left and right clamping plates are connected via the left and right sliding grooves. The left and right clamping plates are moved inward using the left and right sliding grooves. The heavier the segment being clamped, the greater the clamping force. Furthermore, since the overall load-bearing structure is entirely supported by steel without the participation of electronic structures, the load-bearing strength can be greatly increased.
Owner:SINOHYDRO BUREAU 5
A reinforcing and reinforcing device for tunnel lining
The utility model relates to tunnel engineering construction and maintenance technical field, especially a kind of reinforcing and reinforcing device for tunnel lining, including base and the support assembly installed on base.The utility model adopts electric or hydraulic multistage telescopic rod and sliding part cooperation guide rail, can realize the quick accurate positioning of reinforcing plate three-dimensional space;Five groups of reinforcing plate constitute multi-station operation unit, match cross ring embrace type layout, can simultaneously carry out reinforcing to lining multiple area, compared with traditional single-station operation efficiency improvement 50%, greatly shorten construction cycle, wherein chain drive structure will telescopic rod thrust evenly dispersed to reinforcing plate, avoid lining local stress concentration;Reinforcing plate both sides diamond composite wear-resistant convex block after sandblasting roughening treatment, through microcosmic mechanical inlay, the occlusal force of lining is greatly enhanced, cooperate constant pressure adhesion, effectively prevent reinforcing material from falling off, make lining structure bearing capacity improve more than 30%, significantly prolong the service life of tunnel.
Owner:张叶明
A fast-hardening, high-toughness shotcrete and its grouting construction method
This invention discloses a rapid-hardening, high-toughness shotcrete and its spraying construction method, belonging to the field of concrete material technology. It employs a technical route of multi-component synergistic rapid-hardening – modified hybrid fiber toughening – three-stage synergistic expansion – three-phase distribution spraying method. The shotcrete material consists of powder, graded fine aggregate, polymer, high-performance liquid accelerator, and water. The graded fine aggregate forms a riprap skeleton; the high-belite aluminum sulfate cement and silicate cement compound lay the foundation for rapid hardening; the modified hybrid fibers construct a three-dimensional reinforcing network to achieve high toughness and crack resistance; the multi-component composite expansion agent compensates for shrinkage throughout all ages; and the micro-nano active admixtures and polymer optimize interfacial bonding performance. It is complemented by high-pressure airflow cleaning / nano-silicon ion impregnation of the substrate and a three-phase distribution spraying method of rapid-hardening cement paste – graded fine aggregate – liquid accelerator. The concrete of this invention combines rapid hardening, high strength, and high toughness and crack resistance, shortening response time and improving construction efficiency.
Owner:NANJING HYDRAULIC RES INST
Scaffolding bridge positionable in a tunnel to allow to be processed as well as a method of processing a tunnel
Owner:VEXA SRL
Intelligent grouting reinforcement device for red layer engineering and grouting process monitoring method
This invention relates to the field of engineering geological reinforcement technology, specifically disclosing an intelligent grouting reinforcement device and grouting process monitoring method for red bed engineering. The device includes a grouting pump, a porous grouting pipe, a pressure sensor, and an intelligent control module. The porous grouting pipe is made of corrosion-resistant material, with spirally staggered grouting holes on its sidewall. Filters are installed inside / at the holes. One end of the pipe is a closed end with a guide cone, and the other end is a pump connection end. The pressure sensor is embedded in the pipe wall, collecting pressure data in real time and transmitting it wirelessly. After receiving the data, the intelligent control module adjusts the grouting pump parameters through data processing, execution control, and alarm units, triggering an alarm in case of abnormalities. The monitoring method continuously collects data through the pressure sensor, and the intelligent control module determines thresholds and dynamically adjusts the system. This invention achieves full-process intelligent grouting, improving the stability and safety of red bed engineering and providing data reference for subsequent similar projects.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
A highway tunnel fabricated steel-concrete thin-walled reinforcing structure and design method
ActiveCN120100482BNot affected by reinforcementinfluence spaceUnderground chambersTunnel liningArchitectural engineeringThin walled
Owner:CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
Waterproof structure of deformation joint between tunnel main body bottom plate and side wall
The utility model discloses a tunnel main part bottom plate and side wall deformation joint waterproof structure, including bottom plate deformation joint waterproof structure, side wall deformation joint waterproof structure and bottom plate and side wall joint waterproof structure, bottom plate deformation joint waterproof structure includes bottom plate recess, punch corrugated pipe, apron and concrete filling layer, side wall deformation joint waterproof structure includes side wall recess and water receiving box, and side wall deformation joint and water receiving box enclose the water guide channel to the downward, bottom plate and side wall joint waterproof structure includes roadside apron ditch, and the end of punch corrugated pipe near side wall and the bottom end of water receiving box all are communicated with roadside apron ditch. The utility model discloses a tunnel main part bottom plate and side wall deformation joint waterproof structure, through bottom plate and side wall adopt " with the main, with the supplementary of the row " waterproof structure, effectively guarantee the service life of deformation joint waterproof structure, prevent the water seepage of later stage and overflow to bituminous pavement or the interference pavement.
Owner:NANJING HUIYU CONSTRUCTION ENGINEERING TECHNOLOGY CO LTD
A local sleeve arch reinforcing structure for mountain tunnel lining cracking
The utility model relates to tunnel maintenance technical field especially a kind of local sleeve arch reinforcing structure for mountain tunnel lining cracking, including fixed groove, arc supporting plate and precast block, the fixed groove is set on the secondary lining of tunnel along tunnel longitudinal direction, the arc of the arc supporting plate is consistent with the arc of tunnel top, linear segment is provided at the both ends of arc supporting plate, the linear segment is fixed in the fixed groove, the arc supporting plate is equipped with accommodating space, the cross-sectional shape of precast block corresponds with the cross-sectional shape of accommodating space, precast block is fixedly connected with the arc supporting plate, and precast block fills accommodating space.Arc supporting plate and precast block can be produced in advance in factory, only need to open fixed groove on the secondary lining of both sides of tunnel in tunnel construction, simplify the cumbersome construction process, can greatly shorten the time of sleeve arch reinforcing technology construction.
Owner:HUNAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD
Gradient lining structure of traffic tunnel crossing active fault and construction method thereof
PendingUS20260168379A1Underground chambersHydro energy generationArchitectural engineeringStructural engineering
Disclosed in a gradient lining structure of a traffic tunnel crossing an active fault. Within an anti-dislocation fortification range of the tunnel, the gradient lining structure of a traffic tunnel crossing an active fault is provided with a surrounding rock reinforcing layer, an initial supporting layer, a deformation absorption layer, a waterproof layer, and a secondary lining layer in sequence from outside to inside based on a fault dislocation deformation rate curve, so as to obtain the gradient lining structure of a traffic tunnel crossing an active fault. Provided is a construction method of the gradient lining structure of a traffic tunnel crossing an active fault. Compared with the prior art, the gradient lining structure of a traffic tunnel crossing an active fault of this disclosure can achieve uniform stress and deformation of the tunnel lining structure, thereby avoiding misalignment and damage of the lining structure under fault movement.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
A new environment-friendly intelligent grouting vehicle
The utility model discloses a novel environmental protection intelligence grouting vehicle, including making pulp system, storage pulp system and grouting system that set up in the compartment in proper order and be connected, wherein: storage pulp system includes A liquid tank, B liquid tank and electric control cabinet, A liquid tank and B liquid tank are used for storing different types of slurry, wherein: the outlet of A liquid tank is provided with first pneumatic butterfly valve, and the first pneumatic butterfly valve is divided into two parallel pipe lines, and the first pipe line is connected with the water tank, and the first pipe line is provided with second pneumatic butterfly valve, and the second pipe line is connected with A liquid grouting pump, and the outlet of B liquid tank and B liquid grouting pump are communicated with third pipe line, and the third pipe line is provided with third pneumatic butterfly valve, and the first pipe line and third pipe line are communicated with fourth pipe line, and the fourth pipe line is provided with fourth pneumatic butterfly valve. Adopt this grouting vehicle to realize the integration and automation of grouting operation, improve the efficiency and quality of grouting operation, reduce construction cost.
Owner:CHINA RAILWAY TUNNEL BUREAU GROUP (SHANGHAI) SPECIAL HIGH-TECH CO LTD +1
Method for determining safe distance of secondary lining construction of first hole in small-spacing tunnel blasting excavation
This invention discloses a method for determining the safe distance for secondary lining construction of the pilot tunnel in small-clearance tunnel blasting excavation, which involves judging the stability of the surrounding rock deformation and deformation rate, and determining the safe allowable distance R. i Given the range of values, design an orthogonal test scheme for on-site vibration velocity monitoring, and calculate the safe distance R for each scheme. i First, based on the safe allowable distance Ri, monitoring points for blasting vibration velocity are set up, and on-site vibration monitoring is conducted. A unique K value and α value are obtained by fitting parameters such as the measured vibration velocity and explosive charge, and the calculated safe allowable distance R is then calculated. j Determine the conservative safety allowable distance R b Does it meet the requirements? If it does, then it is the final safe allowable distance R. z This scheme can determine the safe distance between the blasting source of the subsequent tunnel and the secondary lining of the preceding tunnel, thereby reducing the impact of vibrations generated by the blasting excavation of the subsequent tunnel on the secondary lining of the preceding tunnel.
Owner:CHINA ENENG GRP THIRD ENG BUREAU CO LTD
Segments and earth retaining structures
PendingJP2026103952AUnderground chambersTunnel liningManufacturing cost reductionClassical mechanics
This disclosure provides segments and earth retaining structures that, when using a one-touch type joint for the segments, can suppress costs such as manufacturing costs while maintaining watertightness provided by the joint plate. [Solution] The segment is a segment that constitutes a cylindrical body to be embedded as an earth retaining structure, and comprises a pair of main girders, a pair of joint plates, a skin plate that constitutes the outer surface of the cylindrical body, and concrete filled into a frame composed of the pair of main girders, a pair of joint plates, and a skin plate. At least one of the pair of joint plates is formed integrally with the skin plate and is bent relative to the skin plate to constitute a part of the end face of the segment in the circumferential direction, and both end faces of the segment in the circumferential direction have end faces in the central part in the radial direction of the cylindrical body where the concrete is exposed.
Owner:JFE METAL PROD & ENG INC
Tunnel water-rich sand layer tunnel hole intelligent control grouting grouting system
This application relates to the field of tunnel engineering and discloses an intelligent grouting control system for water-rich sandy tunnels, belonging to the field of tunnel construction technology. The system includes a global perception module, a multi-source information fusion module, a collaborative control decision-making module, an execution drive module, and a closed-loop optimization module. The global perception module is used to synchronously acquire drilling rig status, grouting parameters, and formation response data; the multi-source information fusion module achieves time alignment of multi-source heterogeneous data through a unified clock source and calculates key features such as the drilling-grouting efficiency ratio and dynamic pressure gradient; the collaborative control decision-making module evaluates the grouting situation based on feature parameters and automatically selects one of the following modes—drilling-grouting master-slave collaboration, safety-priority collaboration, and global optimization collaboration—to generate a target control quantity; the execution drive module converts the control quantity into instructions to adjust hardware actions; and the closed-loop optimization module dynamically updates the adaptive filling coefficient based on the actual grouting effect deviation.
Owner:WUHAN SHENTUN CONSTRUCTION CO LTD
Adjustable pressure curtain grouting device
The application relates to a pressure-adjustable curtain grouting device. The pressure-adjustable curtain grouting device comprises a storage box for slurry stirring, a connecting structure, a slurry pipeline with a switch valve connected to the storage box, a pressure-adjusting pump connected to the slurry pipeline, a jetting pipeline for curtain grouting connected to the pressure-adjusting pump, the jetting pipeline comprising a first pipeline and a second pipeline, one end of the first pipeline being connected to the pressure-adjusting pump, the other end of the first pipeline being in communication with the second pipeline through a connecting structure for adding auxiliary materials into the jetting pipeline, an auxiliary material pipeline with a pump being arranged in communication with one side of the connecting structure, and an auxiliary material mixing box being in communication with the auxiliary material pipeline. The application can timely change the properties or concentration of the currently jetted slurry, timely eliminate the adverse effects of slurry spouting or large slurry consumption, and simultaneously carry out auxiliary material and slurry grouting only by mixing the auxiliary material, so that the construction efficiency is greatly improved.
Owner:SINOHYDRO BUREAU 14 CO LTD