Abstract

A laboratory experiment device and experiment method for micro-perturbation grouting technology for a subway in operation, aiming at solving the problem of the lack of simulation equipment, in a laboratory, concerning micro-perturbation conditions in an operation process. The experiment device comprises a soil box (4) for accommodating reduced-scale segments (5). The upper surface of the soil box (4) is provided with a pressure-mounted cover body. The cover body is mounted on a gantry-shaped reaction frame (2). A hydraulic telescopic rod is arranged between the cover body and the reaction frame (2). The reduced-scale segments (5) form a reduced-scale tunnel. A grouting hole connected to a grouting loop is reserved at the bottom of each section of the reduced-scale tunnel. The grouting loop is sleeved with non-contact measuring mechanisms (9). The grouting loop further comprises a bypass branch connected to a bypass grouting pipe (12). The bypass grouting pipe (12) penetrates through the cover body, and the tail end of the bypass grouting pipe is located outside the reduced-scale tunnel. The roundness trimming of a reduced-scale tunnel is realized by staged layered grouting around the reduced-scale tunnel in low intensity and high frequency.

IPC Classes  ?

• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass
• E21D 11/10 - Lining with building materials with concrete cast in situShuttering or other equipment adapted therefor

Abstract

A boring machine structure achieving front support, and a working method, aiming at providing a boring machine structure which achieves front support and is more compact. A front shield (3) is provided behind a cutterhead (1), and is in the shape of a truncated pyramid; a protective net assembly mechanism is provided outside the front shield; an outer shield (7) is provided behind the protective net assembly mechanism; the structure of the cutterhead (1) is internally provided with a rock slag leading-out channel (2), which is connected to a feeding end of a rock slag conveying mechanism (4); a protective housing (6) is sleeved outside the rock slag conveying mechanism (4); and supporting shoes (8) and a support assembly conveying platform (9) are provided behind the outer shield (7) and on the protective housing (6).

IPC Classes  ?

• E21D 9/06 - Making by using a driving shield
• E21D 9/087 - Making by using a driving shield with additional boring or cutting means with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
• E21D 9/04 - Driving tunnels or galleries through loose materialsApparatus therefor not otherwise provided for
• E21D 9/12 - Devices for removing or hauling away excavated material or spoilWorking or loading platforms
• E21D 11/20 - Special cross-sections, e.g. corrugated
• E21D 11/40 - Devices or apparatus specially adapted for handling or placing units of linings for tunnels or galleries

Abstract

A mud cake formation prevention steel plate for a shield cutter head, and a simulation test table and test method for characteristic testing thereof. The steel plate is installed on a shield cutter head, is snap-fitted to a rake face (1) of a cutting bit on a cutter head, is consistent with the rake face (1) of the cutting bit on the cutter head in shape, position and size, and is connected to the rake face (1) by means of a bolt; the steel plate is made of one of molybdenum-vanadium alloy and Q235/Q245, and the smoothness of the upper surface thereof is less than 0.1. Equivalently, a layer of tempered film beneficial to mud sliding is additionally arranged on the cutting bit, and the tempered film has a set of detection platform so as to be adjusted and replaced in real time under different working conditions. Information of a cutting face can be quickly obtained, and the problem in the prior art that mud cake formation on a shield cutter head affects the outflow of mud, and thus affects the overall working state is solved.

IPC Classes  ?

• E21D 9/08 - Making by using a driving shield with additional boring or cutting means
• G01N 19/04 - Measuring adhesive force between materials, e.g. of sealing tape, of coating

Abstract

Provided is a TBM tunneling test bench for microwave-assisted rotary rock breaking including a tunneling test bench body and a microwave-assisted rock breaking system, wherein the tunneling test bench body includes a base, a turnover bracket, a movable bracket, turnover oil cylinders, a pushing oil cylinder and a cutter head; the turnover bracket is hinged to the base; the turnover oil cylinders are connected between the base and the turnover bracket; the movable bracket coaxially sleeves the turnover bracket; the pushing oil cylinder is connected between the turnover bracket and the movable bracket; the cutter head is coaxially located in the movable bracket, and rotates freely; cutter head rotation driving motors are mounted in the movable bracket; the microwave-assisted rock breaking system is mounted between the movable bracket and the cutter head; and a rock sample bearing and placing box is arranged on the turnover bracket on an opposite side of the cutter head.

IPC Classes  ?

• G01M 99/00 - Subject matter not provided for in other groups of this subclass
• E21D 9/10 - Making by using boring or cutting machines
• E21D 9/11 - Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines

Abstract

Provided is a shield tunnelling test platform suitable for multiple large mechanical occasions, for use in solving the problem in the prior art that a shield tunnelling simulation measurement device is difficult to be applied to a large mechanical occasion and difficult to cope with a complex landform. The platform is mounted in a stepped test space, and comprises a shield tunnelling simulation test platform (1), an engineering structure loading platform (2) adapted to a rock stratum pressure condition of a shield simulation device, and a real-time observation device (3) for observing the loading platform (2); the shield tunnelling simulation test platform (1) comprises a tunnel boring machine module and a muddy water circulation module (4); the engineering structure loading platform (2) is in the shape of a box the top of which is provided with a flip cover (205), and the inside of which is filled with test soil. The present invention has the advantages that: a stress condition of the shield simulation device and an influence on a riverbed rock stratum can be accurately simulated under diverse geographic conditions such as the lower part of a riverbed and the lower part of a rock stratum, and a construction site can be simulated in combination with a mortar system.

IPC Classes  ?

• E21D 9/08 - Making by using a driving shield with additional boring or cutting means
• E21D 9/06 - Making by using a driving shield
• G01L 5/00 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
• G01M 99/00 - Subject matter not provided for in other groups of this subclass
• G01N 33/24 - Earth materials
• E21F 17/18 - Special adaptations of signalling or alarm devices
• E21F 17/00 - Methods or devices for use in mines or tunnels, not covered elsewhere

Abstract

A hard rock tunnel boring machine combining microwave heating with high pressure water cutting for assisting in rock breaking includes a tunnel boring machine body, a microwave heating assisted rock breaking system and a high pressure water cutting assisted rock breaking system, wherein the microwave heating assisted rock breaking system is arranged on the tunnel boring machine body, and is used for heating and cracking a rock; and the high pressure water cutting assisted rock breaking system is arranged on the tunnel boring machine body, and is used for performing hydraulic cutting on the rock. A rock breaking sequence lies in that the microwave heating assisted rock breaking system is used for heating and cracking the rock, then the high pressure water cutting assisted rock breaking system is used for performing hydraulic cutting on the rock, and finally, the tunnel boring machine body is used for squeezing and breaking the rock.

IPC Classes  ?

• E21D 9/10 - Making by using boring or cutting machines
• E21D 9/06 - Making by using a driving shield

Abstract

A groove pipe device for tunnel surrounding rock internal micro-fracture development characteristics, and a monitoring method therefor. The device comprises a hollow elliptic metal ball (1), a groove pipe (2), a round pipe (3) and an electric wire (4). During monitoring, a drilling machine is used for drilling a plurality of drill holes (5) into the surrounding rock, the groove pipe (2) is arranged in the multiple drill holes (5), and the hollow elliptic metal ball (1) is ejected into bottoms of the drill holes (5) by means of the groove pipe (2); pressure is applied to the groove pipe (2) to press and deform the hollow elliptic metal ball (1) at the bottoms of the drill holes (5), then the groove pipe (2) movably connected to the hollow elliptic metal ball (1) is pulled out, and meanwhile the electric wire (4) is led out to enable the hollow elliptic metal ball (1) to be clamped at the bottoms of the drill holes (5); and the drill holes (5) are filled with a conductive injection agent (6), the hollow elliptic metal ball (1), the electric wire (4), the conductive injection agent (6), a battery (7) and pointer electronic clocks (8) are connected in series, and the starting time and the stopping time of the pointer electronic clocks (8) connected to different drill holes (5) are recorded. The device has a simple structure, is convenient to operate, has a high monitoring accuracy and low costs.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• E21F 17/18 - Special adaptations of signalling or alarm devices

Abstract

A TBM tunneling test bench for microwave-assisted rotary rock-breaking. The TBM tunneling test bench comprises a tunneling test bench main body and a microwave-assisted rock-breaking system. The tunneling test bench main body comprises a base (1), a turn-over support (2), a movable support (3), a turn-over oil cylinder (4), a propulsion oil cylinder (5) and a cutter head (6), wherein the turn-over support (2) is hinged to the base (1); the turn-over oil cylinder (4) is connected between the base (1) and the turn-over support (2); the movable support (3) is coaxially sleeved on the turn-over support (2) and can move axially; the propulsion oil cylinder (5) is connected between the turn-over support (2) and the movable support (3); the cutter head (6) is coaxially arranged inside the movable support (3) and can rotate freely; a cutter head rotation drive electric motor (7) is mounted inside the movable support (3); the microwave-assisted rock-breaking system is mounted between the movable support (3) and the cutter head (6); a rock sample bearing box (8) is arranged on a portion of the turn-over support (2) that is directly opposite the cutter head (6); and a hobbing cutter (10) is directly opposite a surface of a rock sample (9). The TBM tunneling test bench can be switched between a vertical rock breaking simulation state and a horizontal rock breaking simulation state; and a TBM tunneling simulation test under a microwave-assisted rotary rock-breaking condition and multi-hobbing-cutter rock breaking under a microwave action can be carried out.

IPC Classes  ?

• E21D 9/11 - Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
• G01N 3/58 - Investigating machinability by cutting toolsInvestigating the cutting ability of tools

Abstract

A hard rock tunnel boring machine combining microwave heating and high-pressure water cutting to assist rock breaking, comprising a boring machine body (I), a microwave heating-assisted rock breaking system (II), and a high-pressure water cutting-assisted rock breaking system (III). The microwave heating-assisted rock breaking system (II) is provided on the boring machine body (I), and a rock is heated and fractured by means of the microwave heating-assisted rock breaking system (II). The high-pressure water cutting-assisted rock breaking system (III) is provided on the boring machine body (I), and the rock is hydraulically cut by means of the high-pressure water cutting-assisted rock breaking system (III). The rock breaking sequentially comprises: first, heating and fracturing the rock by means of the microwave heating-assisted rock breaking system (II), then hydraulically cutting the rock by means of the high-pressure water cutting-assisted rock breaking system (III), and then pressing and crushing the rock by means of the boring machine body (I).

IPC Classes  ?

• E21D 9/10 - Making by using boring or cutting machines

Abstract

A mixing device for improving measurement precision of a shield slurry density meter, comprising an external motor (4) located on the outer side of a slurry pipe (1), and an inner roller (2) and an outer cylinder (3) coaxial with the slurry pipe (1). The inner roller (2) is rotatably assembled within the outer cylinder (3). A roller gear (11) is fixed or integrally formed on the outer sidewall of the inner roller (2). A driving gear (5) is connected to the output end of the external motor (4) in a rotation stopping mode. An opening (13) which allows the driving gear (5) to extend into and to be in engaged transmission with the roller gear (11) is formed on the outer cylinder (3) at the position corresponding to the roller gear (11). The outer cylinder (3) is used for being fixedly connected to two slurry pipes (1). Two ends of the inner roller (2) respectively extend into the two slurry pipes (1), and the outer sidewalls of the two ends of the inner roller (2) are respectively provided with sealing rings (10) used for matching the two slurry pipes (1) in a sealing mode. When in use, the inner roller (2) is driven by the driving gear (5) to rotate, and slurry is mixed evenly with the inner roller (2).

IPC Classes  ?

• B01F 29/31 - Mixing the contents of individual packages or containers, e.g. by rotating tins or bottles the containers being supported by driving means, e.g. by rotating rollers
• B01F 29/60 - Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
• G01N 9/24 - Investigating density or specific gravity of materialsAnalysing materials by determining density or specific gravity by observing the transmission of wave or particle radiation through the material

Abstract

Provided is a traverse-type tunnel arc-shaped member mounting machine, comprising a main rack (1), an auxiliary rack (2), an adjusting platform (3) and a stepping oil cylinder (4), wherein the height position, pitch angle and roll angle of an arc-shaped member are adjusted by means of different combined actions of four support legs; the height position, the pitch angle and the roll angle are finely adjusted by means of different combined actions of four fine adjustment oil cylinders on the adjusting platform; the front-back position of the arc-shaped member is adjusted by means of combined actions of the main rack, the auxiliary rack and the stepping oil cylinder; the left-right position of the arc-shaped member is adjusted by means of a transverse moving oil cylinder driving a transverse moving platform; and the yaw angle of the arc-shaped member is adjusted by means of a rotating oil cylinder driving a rotating platform to rotate about an axis of a slewing bearing. Thus, the precise positioning and mounting of the arc-shaped member in a tunnel are achieved, thereby improving the mounting quality and efficiency of an internal structure of an assembled tunnel.

IPC Classes  ?

• E21D 11/40 - Devices or apparatus specially adapted for handling or placing units of linings for tunnels or galleries

Abstract

Disclosed is a microwave-assisted TBM double-hob linear-cutting rock breaking test device. A microwave heating device is combined with a TBM hob rock breaking device for the first time, and microwave irradiation may be arranged at an intermediate position in a hob cutting trajectory and may also be arranged in the same trajectory as hob cutting. The device is used for studying the cutting performance of a TBM hob under the action of microwaves and a cutting rock breaking and abrasion mechanism of the TBM hob under the action of microwaves, so as to determine rational penetration and hob spacing under the action of microwaves, and further studying a new rock breaking technique combining a hard rock microwave cracking technique and a TBM apparatus.

IPC Classes  ?

• G01N 3/58 - Investigating machinability by cutting toolsInvestigating the cutting ability of tools
• G01N 3/56 - Investigating resistance to wear or abrasion

Abstract

A shielding machine having a telescopic normal-pressure tool changing compartment, comprising a shielding machine body (200), and a cutter head body (100) in transmission connection with an advancing end thereof; the cutter head body (100) has a flat cylindrical structure, five muck holes (105) at equal angles are provided at an end face of the cutter head body (100), and tool clamping plates (106) are provided between adjacent muck holes (105) on the end face of the cutter head body (100). By providing, in the region between the cutter head body (100) and the shielding machine body (200), a first fan-shaped shell (205) and a second fan-shaped shell (206) which are connected to the shielding machine body (200) and are telescopic, and sealing the connection between the first fan-shaped shell (205) and the second fan-shaped shell (206), when an operator changes a tool, the telescopic first fan-shaped shell (205) and second fan-shaped shell (206) are connected to the cutter head body (100), so as to form a closed compartment with the adjacent muck hole (105) and tool clamping plate (106) of the cutter head body (100), increasing the efficiency of cutter head change and shortening the replacement period while ensuring the soil mass being supported by a high pressure and facilitating the operation of an operator at a normal pressure.

IPC Classes  ?

• E21D 9/08 - Making by using a driving shield with additional boring or cutting means

Abstract

A technique for controlling the tunneling parameters of a shielded tunneling machine for a rocky region at a shielded tunneling launch point, said technique being aimed at situations in which rock is present during tunneling. By means of building pressure with a mud tank, controlling shielded tunneling speed, controlling the amount of muck excavated, and controlling synchronous grouting and secondary grouting, the influence of the presence of rock on shielded construction is fundamentally eliminated, thus realizing the safe and smooth execution of shielded construction.

IPC Classes  ?

• E21D 9/093 - Control of the driving shield
• E21D 9/08 - Making by using a driving shield with additional boring or cutting means
• E21D 11/10 - Lining with building materials with concrete cast in situShuttering or other equipment adapted therefor

Abstract

Disclosed is a broken stratum TBM jamming risk early-warning method based on a torque-thrust ratio. The method comprises the following steps: S1, collecting, by means of exposing a surrounding rock geological sketch of a shield, surrounding rock state data; S2, acquiring, by means of a TBM data collection system, TBM boring parameter data; S3, establishing a correlation between a torque-thrust ratio and a surrounding rock state; S4, acquiring, by means of a TBM boring report recorded by a main driver, boring state data; S5, establishing a jamming risk evaluation criterion based on the torque-thrust ratio; and S6, determining, by means of TBM real-time boring parameters and according to the evaluation criterion, a TBM jamming risk and performing real-time early-warning. According to the present invention, a tunnel surrounding rock state, a TBM boring state and a possible jamming risk in TBM boring can be effectively mastered in a timely manner, such that a constructor can master information of various aspects in a timely manner and take TBM jamming prevention measures in a timely manner, and therefore, the risk of a TBM being jammed can be effectively reduced and the TBM construction efficiency can be improved.

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• E21F 17/18 - Special adaptations of signalling or alarm devices

Abstract

A TBM parallel heading tunnel trunk construction method. Parallel heading tunnel trunk construction comprises parallel heading station section construction, parallel heading TBM preparation tunnel, starting tunnel and receiving tunnel construction, and parallel heading TBM tunneling section construction. The parallel heading station section construction comprises tunnel portal shallow-buried section construction and IV-level surrounding rock bolt-shotcrete lining section construction. A three-step method is used for excavation in the tunnel portal shallow-buried section construction, and a two-step method is used for excavation in the IV-level surrounding rock bolt-shotcrete lining section construction. During the parallel heading TBM preparation tunnel, starting tunnel and receiving tunnel construction, a drilling and blasting method is used for construction, the three-step is used for excavation at V-level surrounding rocks, and a full-face tunneling method is used for excavation at III-level and IV-level surrounding rocks. Using different construction modes for different geology effectively shortens the construction period and improves the construction efficiency, and the designed construction method is adopted to ensure the safety of the construction process and the stability of the surrounding rocks.

IPC Classes  ?

• E21D 9/06 - Making by using a driving shield
• E21D 9/087 - Making by using a driving shield with additional boring or cutting means with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
• E21D 11/00 - Lining tunnels, galleries or other underground cavities, e.g. large underground chambersLinings thereforMaking such linings in situ, e.g. by assembling
• E21D 20/02 - Setting anchoring-bolts with provisions for grouting