2253 results about "Shield tunneling" patented technology

The invention provides a three-way loading mechanical property test system of a multifunctional lining segment joint, which mainly comprises a self-balancing frame sub-system, a loading sub-system, a test-piece support sub-system, a test-piece transporting sub-system, a loading control sub-system and a data acquisition sub-system. The loading sub-system adopts a modular design and can finish a shield tunneling lining segment inter-ring shearing test, a bending moment transferring test, a longitudinal joint corner rigidity test, a longitudinal joint radial shearing test and the like by different combinations. The system of the invention can preferably imitate three-way stress states of the shield tunneling lining segment joint in actual conditions and can finish various different loading modes to obtain mechanical parameters of the shield tunneling lining segment joint and mechanical properties of other similar structures.

Disclosed is a simulating system used for a shield tunnel synchronous grouting test. The system includes model soil, model grout and a synchronous grouting simulating test platform. The model grout is injected into the model soil through the synchronous grouting simulating test platform. The synchronous grouting simulating test platform includes a soil box, a data acquisition system, a loading system, a shield propulsion control system, a simulating shield tunneling machine, pressure sensors and a grouting system. The simulating shield tunneling machine and the model soil are arranged in the soil box. The invention also discloses a test method which uses the simulating system used for the shield tunnel synchronous grouting test. The method includes: 1) preparing the model soil; 2) preparing the model grout; 3) constructing a shield-soil-grout similar system to carry out synchronous grouting tests of different grouting positions, different grouting holes and different grouting quantity allocation proportions.

The invention discloses a track and posture composite control method in a shield tunneling process. The method comprises the following steps of: performing control by setting threshold values for a posture and a track; immediately adjusting the posture as long as the posture deviates to exceed the limit even though the track does not reach a deviation correction threshold; solving current positional deviation Si and angular deviation theta I of a shield machine through measurement and calculation when a shield works; continuously propelling the shield machine when the Si is less than or equal to a positional deviation threshold value Scmin of a track and posture composite controller and theta i is less than or equal to an angular deviation threshold value theta cmin of the track and posture composite controller or when the Si is less than or equal to positional allowable deviation Smin of actual tunnel construction and theta i is equal to 0; contrarily, automatically adjusting propelling pressure of a hydraulic cylinder of each sub-region and propelling displacement to simultaneously eliminate the positional deviation and the angular deviation generated in a tunneling process. Thus, an actual tunneling route of the shield machine is controlled within a design axial range of a tunnel, unnecessary overbreak and underbreak are avoided, and the forming quality of the tunnel is improved.

The invention belongs to the technical field of tunnel construction equipment, and relates to a shield tunneling machine for a tunnel connecting passageway and a connecting passageway tunneling method of the shield tunneling machine. The shield tunneling machine comprises a start end supporting walking platform and a receiving end supporting walking platform which are respectively arranged on material transportation rails in two main tunnels, a shield tunneling machine main unit, a counterforce supporting frame and a main tunnel supporting assembly which are respectively arranged on the start end supporting walking platform and a corresponding main tunnel duct piece, and a start end socket sealing assembly and a receiving end socket sealing assembly which are respectively arranged at the start end and the receiving end of the connecting passageway, wherein a duct piece hanging assembly is arranged on the start end supporting walking platform; a jacking tunneling assembly is arranged between the counterforce supporting frame and the shield tunneling machine main unit. The shield tunneling machine can realize automatically mechanical excavation; the labor intensity is greatly reduced, the energy consumption is reduced, and the cost is reduced; meanwhile, equipment construction is stable, and the efficiency is high; settling of the ground is effectively controlled, and the construction risk is reduced.

The invention discloses a shield tunneling position and pose intelligent prediction method and system based on hybrid depth learning, and belongs to the field of construction of subway shields. According to the method, a prediction control principle and an artificial intelligence technology are adopted based on a shield misalignment mechanism, positions and poses in a shield tunneling stage are predicted according to a built hybrid depth learning model WCNN-LSTM, an adjustment strategy of the shield positions and poses is formulated, and pre-adjustment and prior control of operation parametersare realized so that the problem of shield misalignment is improved. The method is used for performing intelligent prediction of subsequent change of the positions and poses in a tunneling process ofa shield machine, supports a shield machine driver to adjust the shield positions and poses in advance, solves the snake-shaped motion difficulty of the shield machine, alleviates the modulation control hysteretic effect of the shield positions and poses, realizes accurate control of a tunneling axis of the shield machine, can effective promote formation quality of the tunnels and has higher engineering practical values.

The invention discloses a process for grouting on the back of a shield segment to control stratum settlement in shield tunnel construction. The process comprises steps of synchronous grouting, secondary grouting and a special treatment process; during synchronous grouting, when a shield advances and a shield tail is formed, a grouting pump of a shield tunneling machine is used for symmetrical grouting through a synchronous grouting system of the shield tunneling machine; during secondary grouting, double grout is injected to the back of the segment through a shield segment secondary grouting hole, and a gap on the back of the segment is subjected to secondary filling and compression; and the special treatment process comprises steps of adding a triallyl cyanurate (TAC) high-molecular polymer material solution and pressing and injecting epoxy resin seal reinforcing rings. By the process, particularly the TAC high-molecular polymer is added to improve a soil layer and the epoxy resin reinforcing rings are pressed and injected to reinforce the stratum in the special treatment process, the grouting effect is good in a safe and convenient way, the flow and loss of the grout are prevented, the grouting plumpness is ensured, the soil body can be well improved, the stratum is reinforced, the settlement amount is effectively controlled, and the shield tunneling construction is safely and smoothly carried out.

The invention relates to an indoor model testing apparatus for analyzing influences of shield tunnel grouting construction on adjacent pile foundations. The indoor model testing apparatus comprises a model box, a tunnel grouting construction simulator, a tunnel lining model and a pile foundation model. The model box is filled with sandy soil mass, the tunnel lining model comprises longitudinally-segmented aluminum alloy hollow pipes and is placed in the left half part of the model box, and lining segments are separated by annular thin rubber plates; the pile foundation model is placed in the right half part of the model box and vertical to the tunnel lining model; a displacement meter support is fixed to the top surface of the model box; multiple displacement meters are respectively fixed to the corresponding sandy soil mass and the surfaces of piled raft foundations of the pile foundation model through the displacement meter support; the tunnel grouting construction simulator comprises a latex film surrounding the periphery of the tunnel lining model and an annular liquid cavity formed between the tunnel model and the latex film, the annular liquid cavity is filled with grouting liquid, one end of the annular liquid cavity is connected with a liquid injection guide pipe provided with a liquid injection solenoid valve, and a liquid discharge guide pipe provided with a liquid discharge solenoid valve is arranged at the other end of the annular liquid cavity in the horizontal direction.

The invention discloses an auxiliary tool changing device of a slurry balance shield tunneling machine and an application method of the auxiliary tool changing device. A tool disc is arranged at the foremost end of the slurry balance shield tunneling machine. An excavation cabin, an air cushion cabin and an entry gate cabin are sequentially arranged behind the tool disc. The auxiliary tool changing device comprises a first sliding rail fixedly connected to the upper portion of the air cushion cabin and a moving sliding table embedded in the first sliding rail. A robot is fixedly connected to the moving sliding table, a second sliding rail is arranged at the lower portion of the entry gate cabin, and a conveying frame is erected on the second sliding rail. A second installing base is arranged at the upper end of the conveying frame. A tool changing mechanical arm is arranged on the second installing base, and a lighting and camera shooting device is arranged at the front end of the tool changing mechanical arm. On the basis that an original shield tunneling machine cabinet door and a space structure are not changed, the auxiliary tool changing device is additionally arranged, the tool changing efficiency can be effectively improved, the tool changing cost is reduced, the safety of operators is guaranteed, and the tool abrasion detecting and replacing are finished. The automation level of the tool changing work of the slurry balance shield tunneling machine is improved, and reasonable, safe and efficient tool changing work is achieved.

The invention relates to a geotechnical and underground engineering technology field, particularly to a box-raft pressure-bearing type foundation underpinning and construction reinforcing method for tunnels across pile foundations of a bridge above a river. The method of the invention comprises: reinforcing abutment foundation of both sides of the bridge, reinforcing the riverbed outside the cofferdam construction and abutment, strengthening bridge supports, excavating pits under cofferdam bridges, strengthening expanding plate-type foundations inside the pits and ground base under the plates, as well as shield tunneling and removing obstructive file base. The method can smoothly complete construction and guarantee smooth shield tunneling while ensuring normal passage of existing bridge structure, further can effectively reduce construction risk, accelerate construction process, reduce cost and reduce influence to environment to a maximal extent.

The invention belongs to the field of shield construction, and discloses a double-mode shield tunneling machine. The double-mode shield tunneling machine comprises a shield tunneling main engine, a cutterhead arranged on the front portion of the shield tunneling main engine, an earth bin, an air cushion bin, an earth pressure balancing system and a slurry balancing system, wherein the earth bin, the air cushion bin are sequentially formed in the rear portion of the cutterhead. When the shield tunneling machine works, the shield tunneling machine can be switched between an earth pressure balancing tunneling mode and a slurry balancing tunneling mode according to the strata of practical tunnels, so that the shield tunneling machine is adaptive to tunneling under different geological conditions, and the adaptability to complex strata and the shield construction efficiency are improved. Meanwhile, a dilution tank and a breaker are mounted on the tail of a spiral conveyer to break large rocks to the grain size which can be conveyed by a slurry pump, and the broken large rocks are then discharged through a slurry pipeline, and in this way, the situation that large rocks cannot be discharged smoothly in a slurry mode can be prevented effectively.

The invention discloses a shield tunnel intelligent construction auxiliary system based on the big data technology and an application method. The intelligent construction auxiliary system comprises a basic management module, an analyzing and processing module and a pre-warning module, wherein the basic management module is connected with the analyzing and processing module through a wireless network, and the analyzing and processing module is provided with a database, compares on-site basic management data with the database, performs analysis and outputs corresponding parameter control or performs pre-warning through the pre-warning module; the basic management module comprises an equipment monitoring module, an equipment management module, a technology management module, a quality management module, a safety management module, a material management module and a progress management module. The intelligent construction auxiliary system has the advantages that ambient environment and ground deformation, tunnel project quality and shield tunneling machine faults are predicted and pre-warned, unsafe behaviors during construction are reduced, the operation efficiency of shield tunneling equipment, the safety of tunnel construction and tunnel engineering quality are increased, and the construction cost of tunnel engineering is lowered.

The invention relates to an indoor model test device capable of simulating slurry balance shield construction and a use method thereof. The indoor model test device comprises a digging propulsion mechanism, a circulation mechanism and a slurry injection mechanism, wherein the digging propulsion mechanism comprises an electric motor, a speed reducer, a shield shell, a main shaft and a rotary pipe, the circulation mechanism comprises a circulation tank, a micro water pump, a water inlet pipe, a mud outlet pipe and a pressure regulating pipe, and the slurry injection mechanism comprises a slurry injection tank, a slurry tank, a mini compressor, a pneumatic pressure tube, a slurry injection pipe and a slurry injection head. Compared with the prior art, the indoor model test device has the advantages that a whole construction process, such as dynamic digging propulsion, pipe sheet assembly and wall back grouting, of a slurry balance shield construction machine can be simulated, more accurate and real experimental data can be provided for the design of all parameters for actual shield tunneling construction, and the safety during actual construction is guaranteed.

The invention relates to a synchronous grouting simulation test platform of a shield tunneling machine, comprising a soil tank, a simulation tube piece, a simulation shield tail, a propelling hydraulic cylinder, a guiding barrel, a transparent outer barrel, a soil pressure sensor, a camera and a grouting pump, wherein the axis of the guiding barrel is horizontally and fixedly connected to the left side wall of the soil tank, one end of the transparent outer barrel is coaxially and fixedly connected with the guiding barrel, the other end is fixedly connected with the right side wall of the soil tank, the transparent simulation tube piece is coaxially sleeved in the transparent outer barrel and is fixedly connected with the right side wall of the soil tank, the camera is arranged in an inner cavity of the simulation tube piece, the soil pressure sensor is arranged on the barrel wall of the simulation tube piece, the simulation shield tail is coaxially sleeved in the periphery of the simulation tube piece and can axially slide along the inner barrel wall of the guiding barrel and the outer barrel wall of the simulation tube piece, a grouting hole is arranged in the barrel wall of the simulation shield tail and is communicated with the grouting pump, and the propelling hydraulic cylinder can drive the simulation shield tail to do reciprocating motion. The invention can dynamically simulate and directly observe the whole process of synchronous grouting of the shield tunneling machine under different working conditions, thereby providing conditions for the test and the theoretical study of a synchronous grouting technique of the tunneling machine.

The invention provides a prediction method for bad geological type of shield tunneling based on Xgboost, which is used for solving the technical problems of low prediction accuracy and low timelinessexisting in the prior art. The realization steps are as follows: preprocessing the PDV historical data of a shield tunneling machine; acquiring the key features of multiple pieces of tunneling parameter data after preprocessing; constructing a bad geological prediction data package; establishing a bad geological prediction model of an Xgboost algorithm; evaluating the bad geological prediction model of the Xgboost algorithm; and predicting the bad geological types in shield tunneling. The invention extracts the key data feature set of tunneling parameters which can characterize the stratum change through a random forest algorithm feature extraction model, and predicts The bad the bad geological types through the bad geological prediction model of the Xgboost algorithm, thus improving the accuracy and timeliness of bad geological prediction. The method can be used to monitor and analyze the geological conditions of surrounding rock in the shield tunneling process in real time.

The invention discloses a method for exploring and processing the interior of a boulder hole in front for shield method construction. The method includes the following steps of advanced exploration hole drilling, boulder exploring and boulder processing. In the first step of advanced exploration hole drilling, a plurality of exploration holes are drilled in front of a cutterhead of a shield tunneling machine from back to front through a plurality of drilling channels distributed in the cutterhead of the shield tunneling machine. In the second step of boulder exploring, boulder exploring is performed through an ultrasonic detector and the multiple exploration holes with the following procedures, first, an ultrasonic transmitter and an ultrasonic receiver are installed; second, ultrasonic detection is performed, wherein the installed ultrasonic transmitter and the installed ultrasonic receiver are moved simultaneously from back to front or from front to back, and the strength of the stratum in each moving position is ultrasonically detected in the moving process. In the third step of boulder processing, boulders in front of the cutterhead of the shield tunneling machine are detonated. The method is simple in step, reasonable in design, convenient to achieve, good in using effect and capable of overcoming multiple defects existing in a boulder exploring method adopted in existing shield method construction.

The invention discloses a construction method for disassembling of a shield tunneling machine in a narrow and small space. The construction method comprises the following steps that 1, shield bodies of the shield tunneling machine are designed into assembly-type shield bodies; 2, the shield tunneling machine tunnels, arrives and receives; 3, a track beam is mounted, and an electric block is mounted on the track beam; and 4, the shield tunneling machine is disassembled. According to the construction method, ground hoisting holes do not need to be formed, after a shield cutterhead comes out of atunnel, the cutterhead is disassembled, and then a front shield and a middle shield are pushed sequentially through power of the shields to disassemble the front shield and the middle shield; and then a shield tail is pulled away from the tunnel through external arrangement of a jack to be disassembled, by pushing one of the shield bodies, one or two segments are spliced, and the disassembled components of the shield tunneling machine are transported in the mode of disassembling one of the shield bodies.

The invention belongs to the technical field of shield tunnel engineering and particularly relates to a shield tunnel portal sealing device and a shield tunnel portal sealing method. The shield tunnel portal sealing device comprises a lined wall, an embedded steel ring is arranged on the lined wall, a sealing box is arranged on the embedded steel ring and comprises a sealing steel ring, a fixing plate, a fold type support plate and two waterproof structures, a plurality of grease injecting holes are evenly circumferentially reserved in the sealing steel ring between the two waterproof structures, each waterproof structure comprises a steel wire brush and a cord fabric rubber plate, the cord fabric rubber plates are arranged on one side close to the embedded steel ring, and grouting holes are reserved in the lined wall and in the sealing steel ring on the inner sides of the cord fabric rubber plates. The shield tunnel portal sealing device has the advantages that the cord fabric rubber plates are primarily used for sealing to prevent a major part of water and soil from pouring out, so that 'pouring prevention' is achieved; water penetration is prevented as the steel wire brushes secondarily achieve seamless contact with a shield tunneling machine shell or duct pieces; and the grouting holes reserved in the lined wall and the sealing steel ring can achieve grouting sealing timely in emergencies.

The invention discloses a muddy water balance shield tunneling machine and a slag discharging mechanism thereof. The slag discharging mechanism comprises a mud discharging pipeline and a soil bin for storing residue soil; a separating device for separating mud in the residue soil from gravels is arranged between the soil bin and the mud discharging pipeline; the soil bin communicates with a feeding end of the separating device; a mud discharging end of the separating device communicates with the mud discharging pipeline; and a gravel discharging end of the separating device is provided with a gravel discharging device. The muddy water balance shield tunneling machine comprises a shield and the slag discharging mechanism which is arranged in the shield. The slag discharging mechanism has the advantages that safety and stability of a slag outlet system of the muddy water balance shield tunneling machine are improved, and construction efficiency is also improved.

The invention discloses a torque and force loading device for shield tunneling simulation, belonging to the tunnel engineering technical field. The device comprises a frame, a simulation shield head, a loading disc and a slide rail fixed on the frame. The simulation shield head is arranged on the left end of the frame. A force bearing projection is arranged on a cylinder-shaped lateral surface at the right end of the simulation shield head. The loading disc is arranged on the right end of the frame and is slidably connected with the slide rail. The right end of the loading disc is fixedly connected with a lead screw which passes through the frame to be connected with a reduction device and an electric motor in sequence. A loading projection is fixed on the cylinder-shaped lateral surface at the left end of the loading disc. A force loading unit which passes through the loading projection is arranged on the loading projection. When the simulation shield head is contacted with the loading disc, an end surface of the force loading unit is contacted with the force bearing projection on the simulation shield head. Force loading units which pass through the loading disc along the axial direction are uniformly arranged on the loading disc along the circumferential direction. The device realizes tunneling simulation of the shield under different working conditions by adjusting the force loading units on a force loading system and a torque loading system.

The invention discloses a vertical cup type freezing reinforcement structure and method at the shield tunnel end. The vertical cup type freezing reinforcement structure is multiple rows of vertical freezing pipes which are distributed in a soil body outside a working well at the shield tunnel end and are distributed to be shaped like a Chinese character 'kou', horizontal freezing pipes are arranged on the lower portion of the soil body on which the vertical freezing pipes are distributed in the working well at the end, refrigerant media are circulated in the vertical freezing pipes and the horizontal freezing pipes, and therefore a vertical cup type frozen wall reinforcement body can be formed in the soil body outside the working well at the shield tunnel end. The reinforcement method comprises the steps of step 1, freezing designing; step 2, refrigerating system designing; step 3, drilling constructing; step 4, freezing constructing; step 5, slot wall breaking; step 6, freezing pipe removing; step 7, frost heave and thaw subsidence controlling. The vertical cup type freezing reinforcement structure and method at the shield tunnel end has the advantages that a strata reinforcement mode for the end of a soft soil area which is rich in a water sand layer is achieved, the problem that in the area, a conventional reinforcement mode is poor in reinforcement effect can be effectively solved, and it can be guaranteed that a shield tunneling machine smoothly breaks in and out a tunnel portal.

The invention relates to a device for exchanging a tail brush during shield tunneling, and a construction method of the device. The device comprises a gap adjustment duct piece ring, a separation duct piece ring, a supporting structure and a jack; the gap adjustment duct piece ring and the separation duct piece ring are spliced with each other, and the spliced gaps of the gap adjustment duct piece ring and the separation duct piece ring are positioned behind a second shield tail brush; water-stopping chemical slurry is injected on the back of the gap adjustment duct piece ring from a suspension hole A formed on the back of the gap adjustment duct piece ring; the supporting structure is positioned in the separation duct piece ring; and the backs of the gap adjustment duct piece ring and the separation duct piece ring are connected with the jack through steel wire ropes. The method comprises the following steps of: fixing the gap adjustment duct piece ring in the rear of the shield tailbrush, pulling and separating the separation duct piece ring overlapped with the shield tail brush by the jack on the shield machine, exchanging the shield tail brush and resetting the separation dust piece through the jack. The device for exchanging the tail brush has a simple stricture and few auxiliary measures, the construction method is simple and easy and safe and reliable, and the cost is low. The invention can be widely applied to shield construction, particularly the replacement of the shield tail brush under the condition of a low water pressure.

The invention relates to a cutter head driving device for a shield tunneling machine and a control method thereof. The driving device comprises a plurality of driving motors, a plurality of speed reducers, a main transmission box, a circular cutter head and a circulating oil pump. The synchronous control method for a cutter head of the shield tunneling machine comprises the following steps of: performing synchronous and parallel PID (Proportion Integration Differentiation) closed-loop control on the driving motors; keeping the reference input signals of the driving motors the same; computing the compensation signal of the output signal of each driving motor by adopting a synchronous error compensation method, and feeding back to the input end of a corresponding driving motor; and adding the compensation signals with a control signal output by an optimal PID controller, and inputting into a corresponding driving motor. Due to the adoption of the cutter head driving device and the synchronous control method, the technical problem of synchronous running of a plurality of motors of the cutter head of the shield tunneling machine is solved; the running synchronous performance and tracking performance of a cutter head driving system of the shield tunneling machine are improved; and the motors of the cutter head are enabled to have the same stable torque or speed, and dynamic performances among the driving motors of the cutter head of the shield tunneling machine can be kept the same.

The invention discloses a model shield tunneling machine starting device capable of achieving self-balancing of counter-force. A model shield tunneling machine is arranged on the tunneling side of a test soil box frame, and hydraulic jacks are arranged at one end, far away from the test soil box frame, of the model shield tunneling machine. The model shield tunneling machine starting device comprises a counter-force seat and a guide rail, wherein the counter-force seat and the guide rail are both installed on the work ground, the counter-force seat is arranged on one side, far away from the test soil box frame, of the model shield tunneling machine, the counter-force seat and the test soil box frame are connected with each other through cross beams, and the model shielding tunneling machine is arranged on the guide rail. The model shield tunneling machine starting device capable of achieving the self-balancing of the counter-force can provide the counter-force to the model shield tunneling machine, the counter-force is transmitted to the test soil box frame through the cross beams, and therefore the self-balancing of the counter-force is achieved. Due to the fact that a reaction wall does not need to be built in the process of the model test, on the one hand, the occupied site space of test equipment is reduced and test expense is saved, on the other hand, guide can be provided for starting of the model shield tunneling machine, consistency of the staring direction and the axis direction of a tunnel cave to be built as planed is guaranteed, and posture change of the shield tunneling machine is avoided.

The invention provides a smart control method for shield tunneling rectification. The smart control method comprises the following steps: acquiring real-time data of shield posture and shield tail gapthrough an automatic measuring system, and transmitting real-time data to a smart control module; performing characteristic quantity extraction according to the real-time data, and performing basic parameter calculation to obtain a rectification curve and a shield advancing distance, and controlling a jack oil cylinder to output oil pressure through a controller for adjusting the shield posture of a shield tunneling machine, so that the shield posture tends to be a target posture; after shield advancing for a certain distance, keeping the current output oil pressure, extending the shield tunneling machine posture to a next adjusting distance, calculating the difference between the shield tunneling machine posture and the rectification curve to obtain a rectification assessment amount, adding the rectification assessment amount into the shield tunneling advancing distance in the next adjustment of posture, and storing the output oil pressure and shield posture change condition througha history database module. The smart control method has higher universality, can be suitable for the rectification control of various shield tunneling, and can be applied to early warning of accidentspossibly caused by abnormal operation.

The invention relates to a slurry shield tunneling machine underwater arrival construction method which is characterized by comprising main technological processes including end strengthening, end freezing, tunnel portal chiseling, foundation trench backfilling, shield tunneling machine arrival and subsequent construction. According to the slurry shield tunneling machine underwater arrival construction method, when a shield tunneling machine arrives under the working conditions of deep earthing and high water pressure, an end cannot lower the water level or the lowered water level cannot meet the desired effect, and then the underwater arrival construction method can be adopted. Under the conditions that not enough site is provided for end strengthening or not enough auxiliary measures for the dewatering are provided, the safe and effective slurry shield tunneling machine underwater arrival construction method can also be adopted. The slurry shield tunneling machine underwater arrival construction method has the advantages of being safe, reliable, small in effect on ground surface and the like. The time when the whole shield tunneling machine arrives is obviously shortened, and the quality of splicing tube pipes is good.

The invention relates to a synchronous grouting material of shield tunneling and its preparation method. A cement-free anti-water dispersion and anti-water corrosion synchronous grouting material is mainly composed of the following components by weight ratio: 250-350kg/m<3> of phosphogypsum, 250-400kg/m<3> of fly ash, slag powder and steel slag powder, 25-40kg/m<3> of attapulgite clay, 1-1.4kg/m<3> of polyacrylamide, 2-2.8kg/m<3> of an aliphatic high efficiency water reducer, 800-1000kg/m<3> of river sand, and 200-400kg/m<3> of water. Specifically, for the sum of the weight of the fly ash, the slag powder and the steel slag powder, the fly ash accounts for 0.5-99%, the slag powder accounts for 0.5-99%, and the steel slag powder accounts for 0.5-99%. Mixing and stirring of the materials can obtain the required synchronous grouting material, which has the characteristics of anti-water dispersion, anti-water corrosion, good fluidity, good construction performance, no pipe blockage, long usable time, and fast increase of later strength.

The invention discloses an environment-friendly shield tail sealing grease, a preparation method and application thereof, wherein the environment-friendly shield tail sealing grease comprises the following components in parts by mass: 5 to 20 parts of base oil, 15 to 30 parts of viscosity index improver, 10 to 25 parts of lubricant, 4 to 10 parts of natural degradable fiber, 35 to 50 parts of filler particle material and 0.5 to 3 parts of synthetic macromolecule. By controlling the kneading temperature and time, the prepared environment-friendly shield tail sealing grease is used for the shield tail sealing of a shield tunneling machine in the tunnel engineering; and the sealing grease has the advantages of strong water pressure sealing resistance, excellent pumping performance, strong adhesion, good lubricity, stable performance, no corrosion, oxidization resistance, low construction cost, environment protection and facilitation of preparation technique. The water pressure sealing resistance of the product is about 1.5 times of that of the like products at home and abroad, and the pumping performance of the product is 2-3 times of that of the like products at home, so that the blockage of grease injection pipes can be largely reduced, and the working efficiency of the shield tunneling machine in the tunnel engineering is improved.

The invention discloses a subway shield section boulder refining detecting method based on resistivity trans-hole CT (computed tomography). The subway shield section boulder refining detecting method includes a scientific and reasonable drilling plane layout scheme of an unexcavated in front of a tunneling side; a detecting scheme of paving a resistivity trans-hole CT wiring net and combining two-dimensional general detecting survey with three-dimensional detailed detecting survey. Data acquisition acquires a novel combined observation mode, and more effective information related to abnormal boulder bodies can be acquired; by structuring a three-dimensional resistivity inversion target function and an inversion equation of a carrying distance weighting function, algorithms can be quickly analyzed and solved parallelly by a partial derivative matrix; a resistivity image result diagram of detection of the abnormal boulder body within a ranging range is formed, and size and spatial distribution and the like of the boulder body are deduced by being combined with geological analysis. Three-dimensional high-resolution accurate imaging of the abnormal boulder body can be realized, and power technical support is provided for safety and quick tunneling of construction tunnels by subway shield tunneling machines.

The invention discloses an innocent treatment method for shield tunneling residue soil. The innocent treatment method comprises the following steps: hydraulically flushing the shield tunneling residue soil by virtue of residue slurry separation equipment so as to separate mud and cleaned gravel particulate matters; processing mud by virtue of a mud treatment process so as to form muddy water and mud blocks; and purifying the muddy water by virtue of a muddy water treatment system. The gravel particulate matters formed after the shield tunneling residue soil is processed can be used as a concrete aggregate, so that the waste is recycled, and the economic value is increased; the mud blocks with low sand content and moisture content can be used as a brick-making material, so that a made brick is good in quality; and the muddy water can be reused after being treated. The matters formed after the shield tunneling residue soil is processed are valuable, the gravel particulate matters can be used as the concrete aggregate, the made brick is good in quality, and the water can be reused, so that the reclamation, reduction and innocent treatment of the shield tunneling residue soil can be realized, the land consumption is reduced, and the natural environment is protected.

The invention discloses a construction method of a subway tunnel penetrating through underground continuous walls of a subway station. The construction method comprises the following steps that a vertical shaft is excavated on the outer side of the first continuous wall, and a space enclosing structure is arranged; construction is conducted on a first freezing pipe to reinforce a first freezing pipe of soil mass in the rear of the first continuous wall in the vertical shaft in the direction of a newly-built subway tunnel, and the first freezing pipe is removed after reinforcing is completed; the first continuous wall is broken away in the direction of the newly-built subway tunnel, and thus a first tunnel portal is formed; slag and accumulated water in the vertical shaft are cleaned, and backfilling is conducted on the vertical shaft; a shield tunneling machine penetrates through the vertical shaft and the first continuous wall in the opening direction of the first tunnel portal; the shield tunneling machine is utilized to tunnel to the position of the second continuous wall, and tightly attached to the second continuous wall; a second freezing pipe for reinforcing soil mass is arranged on the outer side of the second continuous wall in a mode of obliquely drilling from the ground surface, and the second freezing pipe penetrates through the position below the newly-built subwaytunnel; shield position opening is conducted, the second continuous wall is broken away in the direction of the newly-built subway tunnel, and thus a second tunnel portal is formed; and the second freezing pipe is removed, and the shield tunneling machine penetrates through the second continuous wall in the opening direction of the second tunnel portal.