CN111720128A - Double-liquid synchronous grouting system of shield machine - Google Patents
Double-liquid synchronous grouting system of shield machine Download PDFInfo
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- CN111720128A CN111720128A CN202010448937.0A CN202010448937A CN111720128A CN 111720128 A CN111720128 A CN 111720128A CN 202010448937 A CN202010448937 A CN 202010448937A CN 111720128 A CN111720128 A CN 111720128A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Environmental & Geological Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a double-liquid synchronous grouting system of a shield machine, which comprises an A/B liquid tank, an A/B liquid stirring motor, an A/B grouting gun, a first grouting channel connected between the A liquid tank and the A grouting gun, a second grouting channel connected between the A liquid tank and the B grouting gun, a third grouting channel connected between the B liquid tank and the A grouting gun, a fourth grouting channel connected between the B liquid tank and the B grouting gun and a control system, wherein the A/B liquid stirring motor is connected with the A/B liquid stirring motor; the first/second/third/fourth grouting channel comprises a first/second/third/fourth grouting pipeline, a first/second/third/fourth blanking valve, a first/second A/B liquid pump and a first/second/third/fourth air valve, the first/second/third/fourth grouting pipeline is connected between the A/B liquid tank and the A/B grouting gun, and the first/second/third/fourth blanking valve, the first/second A/B liquid pump and the first/second/third/fourth air valve are sequentially arranged on the first/second/third/fourth grouting pipeline. The invention can realize stable and good grouting effect and improve the shield engineering quality.
Description
Technical Field
The invention belongs to the technical field of shield of tunnel engineering, and particularly relates to a double-liquid synchronous grouting system applied to a slurry/soil pressure shield machine.
Background
With the increasing of urban subway construction and various tunnel projects, the demands on shield machines are also increasing, but the shield construction process faces challenges of different geological conditions and construction environments.
The shield grouting is one of important links in the shield tunneling construction process, the quality of the grouting effect directly influences the quality of engineering construction, and the ground surface sedimentation can be caused seriously. Therefore, there is a need for a new grouting system and method with better grouting effect, thereby improving the engineering quality.
Disclosure of Invention
The invention aims to provide a double-liquid synchronous grouting system of a shield machine, which has a good grouting effect and can improve the shield engineering quality.
In order to achieve the purpose, the invention adopts the technical scheme that:
a double-liquid synchronous grouting system of a shield machine comprises a liquid A tank for containing grout, a liquid A stirring motor arranged in the liquid A tank and used for stirring the grout, a liquid B tank for containing the grout, a liquid B stirring motor arranged in the liquid B tank and used for stirring the grout, a grouting gun for grouting, a first grouting channel connected between the liquid A tank and the grouting gun, a second grouting channel connected between the liquid A tank and the grouting gun B, a third grouting channel connected between the liquid B tank and the grouting gun A, a fourth grouting channel connected between the liquid B tank and the grouting gun B, and a control system;
the first grouting channel comprises a first grouting pipeline, a first blanking valve, a first A liquid pump and a first air valve, the first grouting pipeline is connected between the A liquid tank and the A grouting gun, and the first blanking valve, the first A liquid pump and the first air valve are sequentially arranged on the first grouting pipeline;
the second grouting channel comprises a second grouting pipeline, a second discharging valve, a second A liquid pump and a second air valve, the second grouting pipeline is connected between the A liquid tank and the B grouting gun, and the second discharging valve, the second A liquid pump and the second air valve are sequentially arranged on the second grouting pipeline;
the third grouting channel comprises a third grouting pipeline, a first B liquid pump and a third air valve, the third grouting pipeline is connected between the B liquid tank and the A grouting gun, and the first B liquid pump and the third air valve are sequentially arranged on the third grouting pipeline;
the fourth grouting channel comprises a fourth grouting pipeline, a second B liquid pump and a fourth air valve, the fourth grouting pipeline is connected between the B liquid tank and the B grouting gun, and the second B liquid pump and the fourth air valve are sequentially arranged on the fourth grouting pipeline;
the control system controls the first blanking valve, the first air valve, the second blanking valve, the second air valve, the third air valve, the fourth air valve, the A grouting gun, the B grouting gun, the A liquid stirring motor and the B liquid stirring motor respectively, and the control system further controls the first A liquid pump, the second A liquid pump, the first B liquid pump and the second B liquid pump in a feedback mode respectively.
The control system includes:
the human-computer interface is used for setting grouting target parameters, displaying grouting actual parameters and inputting grouting control instructions;
a PLC controller, configured to generate control signals based on the grouting control command, the grouting target parameters, and the actual grouting parameters, and transmit the control signals to the first baiting valve, the first A liquid pump, the first air valve, the second baiting valve, the second A liquid pump, the second air valve, the first B liquid pump, the third air valve, the second B liquid pump, the fourth air valve, the A grouting gun, the B grouting gun, the A liquid stirring motor, and the B liquid stirring motor;
and the feedback unit is used for feeding back the actual grouting parameters to the PLC.
The human-computer interface is communicated with the PLC through Ethernet, the feedback unit is communicated with the PLC through a CCLINK, and the PLC is communicated with the first blanking valve, the first A liquid pump, the first air valve, the second blanking valve, the second A liquid pump, the second air valve, the first B liquid pump, the third air valve, the second B liquid pump, the fourth air valve, the A grouting gun, the B grouting gun, the A liquid stirring motor and the B liquid stirring motor through the CCLINK.
The feedback unit is including set up in first A liquid flowmeter on the first slip casting pipeline, set up in second A liquid flowmeter on the second slip casting pipeline, set up in first slip casting pressure sensor on the A slip casting rifle, set up in second slip casting pressure sensor on the B slip casting rifle.
The double-liquid synchronous grouting system of the shield machine further comprises a cleaning system; the cleaning system comprises a first cleaning branch connected with a cleaning water source and arranged at the upper part of the first grouting pipeline, a second cleaning branch connected with the cleaning water source and arranged at the upper part of the second grouting pipeline, a third cleaning branch connected with the cleaning water source and arranged at the lower part of the first grouting pipeline, a fourth cleaning branch connected with the cleaning water source and arranged at the lower part of the second grouting pipeline, a sewage tank, a first recovery branch connected with the midstream of the first grouting pipeline and the sewage tank, a second recovery branch connected with the midstream of the second grouting pipeline and the sewage tank, a first clean water valve arranged on the first cleaning branch, a second clean water valve arranged on the second cleaning branch, a first cleaning valve arranged on the third cleaning branch, a second cleaning valve arranged on the fourth cleaning branch, and a first cleaning control valve arranged on the first grouting pipeline, The second cleaning control valve is arranged on the second grouting pipeline, the first recovery control valve is arranged on the first recovery branch, and the second recovery control valve is arranged on the second recovery branch; the first cleaning control valve is arranged at the upstream of the first air valve, the second cleaning control valve is arranged at the upstream of the second air valve, the first recovery branch is connected between the first air valve and the first cleaning control valve, and the second recovery branch is connected between the second air valve and the second cleaning control valve.
The upper stream of the third cleaning branch, which is positioned in front of the first cleaning valve, and the upper stream of the fourth cleaning branch, which is positioned between the second cleaning valves, are combined into a cleaning input branch, and a clean water pump is arranged on the cleaning input branch.
And the downstream of the first recovery branch after the first recovery control valve and the downstream of the second recovery branch after the second recovery control valve are combined into a cleaning output branch.
The double-liquid synchronous grouting system of the shield machine further comprises a liquid A grout supplementing system, wherein the liquid A grout supplementing system comprises a grout supplementing channel connected to the liquid A tank, a grout supplementing control valve arranged on the grout supplementing channel, a abandoning channel branched from the grout supplementing channel and a abandoning control valve arranged on the abandoning channel.
The double-liquid synchronous grouting method adopted by the double-liquid synchronous grouting system of the shield machine comprises a starting grouting method and a stopping grouting method;
the method for starting grouting comprises the following steps: starting the A grouting gun and the B grouting gun, opening the first blanking valve and the second blanking valve, opening the first air valve and the second air valve, starting the first A liquid pump and the second A liquid pump, and starting grouting through the first grouting channel and the second grouting channel; after a set delay time, opening the third air valve and the fourth air valve, starting the first B liquid pump and the second B liquid pump, and starting grouting through the third grouting channel and the fourth grouting channel;
the grouting stopping method comprises the following steps: stopping the first liquid B pump and the second liquid B pump, closing the third air valve and the fourth air valve, and stopping grouting through the third grouting channel and the fourth grouting channel; and after the set delay time, stopping the first liquid pump A and the second liquid pump A, closing the first baiting valve and the second baiting valve, closing the first air valve and the second air valve, and stopping grouting through the first grouting channel and the second grouting channel.
The cleaning method adopted by the double-liquid synchronous grouting system of the shield machine comprises a pipeline cleaning method and a grouting pump cleaning method;
the pipeline cleaning method comprises the following steps: closing the grouting gun A and the grouting gun B, opening the first cleaning valve and the second cleaning valve, opening the first air valve and the second air valve, opening the first recovery control valve and the second recovery control valve, performing pipeline cleaning through the third cleaning branch, the fourth cleaning branch, part of the first grouting pipeline, part of the second grouting pipeline, the first recovery branch and the second recovery branch, and stopping pipeline cleaning when preset pipeline cleaning time is reached;
the grouting pump cleaning method comprises the following steps: close first unloading valve with second unloading valve is opened first clear water valve with the clear water valve of second is opened first washing control valve with second washs the control valve, opens first recovery control valve with the control valve is retrieved to the second, through first washing branch road the second washs branch road, part first slip casting pipeline, part the second slip casting pipeline first recovery branch road the second is retrieved the branch road the second and is retrieved the branch road and carry out the slip casting pump and wash, stops the slip casting pump and wash when reaching predetermined slip casting pump scavenging period.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention can realize stable and good grouting effect through double-liquid grouting, thereby improving the shield construction quality, avoiding the construction problem, further avoiding the blockage of a grouting pipeline through cleaning, slurry supplementing and discarding, and having important significance for shield construction.
Drawings
FIG. 1 is a schematic diagram of a double-liquid synchronous grouting system of a shield tunneling machine.
Fig. 2 is a schematic diagram of a control system in a double-liquid synchronous grouting system of the shield tunneling machine.
FIG. 3 is a schematic diagram of a human-computer interface of a control system in a double-liquid synchronous grouting system of the shield tunneling machine.
FIG. 4 is a grouting flow chart of the double-liquid synchronous grouting system of the shield tunneling machine of the invention.
FIG. 5 is a cleaning flow chart of the double-liquid synchronous grouting system of the shield tunneling machine of the invention.
In the above drawings: 1. a liquid tank; 2. a liquid A stirring motor; 3. a liquid tank B; 4. b liquid stirring motor; 5. a, grouting gun; 6. b, grouting gun; 7. a first A liquid pump; 8. a second A liquid pump; 9. a first B liquid pump; 10. a second B liquid pump; 11. a first liquid A flow meter; 12. a second liquid A flow meter; 13. a first grouting pressure sensor; 14. a second grouting pressure sensor; 15. a sewage tank; 16. a clean water pump.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.
The first embodiment is as follows: as shown in fig. 1, the double-liquid synchronous grouting system of the shield machine comprises an a liquid tank 1 for containing grout, an a liquid stirring motor 2 arranged in the a liquid tank 1 and used for stirring the grout, a B liquid tank 3 for containing the grout, a B liquid stirring motor 4 arranged in the B liquid tank 3 and used for stirring the grout, an a grouting gun 5 for grouting, a B grouting gun 6 for grouting, a first grouting channel connected between the a liquid tank 1 and the a grouting gun 5, a second grouting channel connected between the a liquid tank 1 and the B grouting gun 6, a third grouting channel connected between the B liquid tank 3 and the a grouting gun 5, a fourth grouting channel connected between the B liquid tank 3 and the B grouting gun 6, and a control system.
Oil cylinders are respectively arranged in the A grouting gun 5 and the B grouting gun 6, and the A grouting gun 5 and the B grouting gun 6 are started and closed by retracting or extending the oil cylinders.
The first grouting channel comprises a first grouting pipeline, a first blanking valve K7, a first A liquid pump 7 and a first air valve K13, the first grouting pipeline is connected between the A liquid box 1 and the A grouting gun 5, and the first blanking valve K7, the first A liquid pump 7 and the first air valve K13 are sequentially arranged on the first grouting pipeline. The second grouting channel comprises a second grouting pipeline, a second discharging valve K9, a second A liquid pump 8 and a second air valve K14, the second grouting pipeline is connected between the A liquid box 1 and the B grouting gun 6, and the second discharging valve K9, the second A liquid pump 8 and the second air valve K14 are sequentially arranged on the second grouting pipeline. The third grouting channel comprises a third grouting pipeline, a first B liquid pump 9 and a third air valve K1, the third grouting pipeline is connected between the B liquid tank 3 and the A grouting gun 5, the first B liquid pump 9 and the third air valve K1 are sequentially arranged on the third grouting pipeline, and a manually controlled third blanking valve K17 can be further arranged on the third grouting pipeline. The fourth grouting channel comprises a fourth grouting pipeline, a second B liquid pump 10 and a fourth air valve K4, the fourth grouting pipeline is connected between the B liquid tank 3 and the B grouting gun 6, the second B liquid pump 10 and the fourth air valve K4 are sequentially arranged on the fourth grouting pipeline, and a manually controlled fourth blanking valve K18 can be further arranged on the fourth grouting pipeline.
For the first grouting pipeline, it is connected to the a grouting gun 5 from the a tank 1, and then the end near the a tank 1 is its upstream, and the end near the a grouting gun 5 is its downstream. The upstream and downstream of the second grouting pipeline, the third grouting pipeline and the fourth grouting pipeline are similar.
The control system respectively controls the first blanking valve K7, the first air valve K13, the second blanking valve K9, the second air valve K14, the third air valve K1, the fourth air valve K4, the A grouting gun 5, the B grouting gun 6, the A liquid stirring motor 2 and the B liquid stirring motor 4, the control system further respectively controls the first A liquid pump 7, the second A liquid pump 8, the first B liquid pump 9 and the second B liquid pump 10 in a feedback mode, the first A liquid pump 7, the second A liquid pump 8, the first B liquid pump 9 and the second B liquid pump 10 have a speed regulation function, and the grouting speed can be controlled.
The control system shown in fig. 2 comprises a human-machine interface (touch screen), a PLC controller and a feedback unit. The human-computer interface is used for setting grouting target parameters, displaying grouting actual parameters and inputting grouting control instructions, and is shown in the attached figure 3. The PLC is used for generating control signals based on grouting control instructions, grouting target parameters and grouting actual parameters and correspondingly transmitting the control signals to the first blanking valve K7, the first A liquid pump 7, the first air valve K13, the second blanking valve K9, the second A liquid pump 8, the second air valve K14, the first B liquid pump 9, the third air valve K1, the second B liquid pump 10, the fourth air valve K4, the A grouting gun 5, the B grouting gun 6, the A liquid stirring motor 2 and the B liquid stirring motor 4. The feedback unit is used for feeding back actual grouting parameters to the PLC. The human-computer interface communicates with the PLC controller through the Ethernet, the feedback unit communicates with the PLC controller through the CCLINK, the PLC controller communicates with the first blanking valve K7, the first A liquid pump 7, the first air valve K13, the second blanking valve K9, the second A liquid pump 8, the second air valve K14, the first B liquid pump 9, the third air valve K1, the second B liquid pump 10, the fourth air valve K4, the A grouting gun 5, the B grouting gun 6, the A liquid stirring motor 2 and the B liquid stirring motor 4 through the CCLINK. The first A liquid pump 7, the second A liquid pump 8, the first B liquid pump 9 and the second B liquid pump 10 are controlled by a hydraulic pump station, so that the PLC controller is sequentially connected with the hydraulic pump station, the oil cylinders of the A grouting gun 5 and the B grouting gun 6, each air valve, each liquid pump and the motor. The PLC can be placed in a cab, so that control logic of the double-liquid synchronous grouting system is processed, pipeline pressure and flow are collected, parameter calculation is carried out, data interaction is carried out between the PLC and a touch screen, and a control instruction from the touch screen is received.
The feedback unit comprises a first A liquid flowmeter 11 arranged on the first grouting pipeline, a second A liquid flowmeter 12 arranged on the second grouting pipeline, a first grouting pressure sensor 13 arranged on the A grouting gun 5 and a second grouting pressure sensor 14 arranged on the B grouting gun 6. The PLC control unit realizes feedback control according to the actual flow and pressure in each grouting pipeline and by combining the set parameters.
The double-liquid synchronous grouting system of the shield machine further comprises a cleaning system. The cleaning system comprises a first cleaning branch connected with a cleaning water source and the upstream of the first grouting pipeline, a second cleaning branch connected with the upstream of the cleaning water source and the second grouting pipeline, a third cleaning branch connected with the downstream of the cleaning water source and the first grouting pipeline, a fourth cleaning branch connected with the downstream of the cleaning water source and the second grouting pipeline, a sewage tank 15, a first recovery branch connected with the midstream of the first grouting pipeline and the sewage tank 15, a second recovery branch connected with the midstream of the second grouting pipeline and the sewage tank 15, a first clean water valve K8 arranged on the first cleaning branch, a second clean water valve K10 arranged on the second cleaning branch, a first cleaning valve K15 arranged on the third cleaning branch, a second cleaning valve K16 arranged on the fourth cleaning branch, a first cleaning control valve K2 arranged on the first grouting pipeline, a second cleaning control valve K5 arranged on the second grouting pipeline, A first recovery control valve K3 disposed on the first recovery branch, and a second recovery control valve K6 disposed on the second recovery branch. The first cleaning control valve K2 is arranged at the upstream of the first air valve K13, the second cleaning control valve K5 is arranged at the upstream of the second air valve K14, the first recovery branch is connected between the first air valve K13 and the first cleaning control valve K2, and the second recovery branch is connected between the second air valve K14 and the second cleaning control valve K5.
The upstream of the third wash branch upstream of the first wash valve K15 and the upstream of the fourth wash branch upstream of the second wash valve K16 can be combined to form a wash feed branch, on which the clean water pump 16 is arranged. Downstream of the first recovery branch after the first recovery control valve K3 and downstream of the second recovery branch after the second recovery control valve K6 may be combined into one purge output branch.
The double-liquid synchronous grouting system of the shield machine further comprises a liquid A grout supplementing system. The liquid A slurry supplementing system comprises a slurry supplementing channel connected to the liquid A tank 1, a slurry supplementing control valve K11 arranged on the slurry supplementing channel, a discarding channel branched from the slurry supplementing channel, and a discarding control valve K12 arranged on the discarding channel.
Before the dual-liquid synchronous grouting system acts, necessary parameters are set on a touch screen interface, and the touch screen interface comprises the outer diameter of a shield machine, the outer diameter of a duct piece, the length of the duct piece, the grouting starting stroke, the injection speed setting, the pressure upper limit setting and the like as shown in fig. 3. Then, the manual or automatic control mode is selected, and the grouting operation is stopped when the pressure reaches the upper pressure limit set value regardless of the control mode used.
1. Double-liquid grouting
The double-liquid synchronous grouting method adopted by the double-liquid synchronous grouting system of the shield machine comprises a starting grouting method and a stopping grouting method.
The starting grouting method comprises the following steps: starting the A grouting gun 5 and the B grouting gun 6, opening a first blanking valve K7 and a second blanking valve K9, opening a first air valve K13 and a second air valve K14, starting a first A liquid pump 7 and a second A liquid pump 8, and starting grouting through a first grouting channel and a second grouting channel; after the set delay time, the third air valve K1 and the fourth air valve K4 are opened, the first B liquid pump 9 and the second B liquid pump 10 are started, and grouting is started through the third grouting passage and the fourth grouting passage.
The grouting stopping method comprises the following steps: stopping the first B liquid pump 9 and the second B liquid pump 10, closing the third air valve K1 and the fourth air valve K4, and stopping grouting through the third grouting channel and the fourth grouting channel; after the set delay time, stopping the first A liquid pump 7 and the second A liquid pump 8, closing the first blanking valve K7 and the second blanking valve K9, closing the first air valve K13 and the second air valve K14, and stopping grouting through the first grouting channel and the second grouting channel.
Specifically, as shown in fig. 4, when slurry is present in the tank a 1 and the tank B3, the liquid a stirring motor 2 and the liquid B stirring motor 4 are always in an activated state.
When the automatic mode is selected for the two-fluid grouting: before the grouting is started, the mode of a B liquid pump (comprising a first B liquid pump 9 and a second B liquid pump 10) is switched to a linkage mode, then a grouting hole needing to be injected is selected, when the tunneling starts, the grouting is started synchronously, the system automatically retracts two grouting gun oil cylinders when the grouting is started, then an A liquid blanking valve (comprising a first blanking valve K7 and a second blanking valve K9) is opened, an A liquid air valve (comprising a first air valve K13 and a second air valve K14) is opened, then the A liquid pump (comprising a first A liquid pump 7 and a second A liquid pump 8) is started, and the starting is completed to start the injection of the A liquid. After a set delay time (for example, 5 s), the B liquid valve (including the third air valve K1 and the fourth air valve K4) is opened, then the B liquid pump (including the first B liquid pump 9 and the second B liquid pump 10) is started, and the B liquid injection is started.
When the shield tunneling is stopped and the grouting reaches the target injection amount, the system enters a stopping process. The liquid B pump (including the first liquid B pump 9 and the second liquid B pump 10) is stopped, the liquid B air valve (including the third air valve K1 and the fourth air valve K4) is closed, and the liquid B injection is stopped. After the set delay time (for example, 5 s), the liquid pump a (including the first liquid pump a 7 and the second liquid pump a 8) is stopped, the liquid blanking valve a (including the first blanking valve K7 and the second blanking valve K9) is closed, and finally the liquid air valve a (including the first air valve K13 and the second air valve K14) is closed, and the liquid injection is stopped. And after grouting, entering a state to be cleaned.
And in the grout injection process, the system automatically and synchronously adjusts the speed of the A/B liquid pump according to the change of the tunneling speed, the preset system grouting injection rate and different pipeline injection proportions. The flow rate, the value fed back by the pressure sensor and the accumulation of the injection amount are displayed in the touch screen in real time. And the program generates a control command according to the calculated and fed back data, and the command is output to the pump and the air valve to control grouting.
When the manual mode is selected by double-liquid grouting: the method comprises the steps of switching a B liquid pump (comprising a first B liquid pump 9 and a second B liquid pump 10) mode to an independent mode, then selecting a grouting hole to be injected, starting grouting synchronously when tunneling starts, automatically retracting two grouting gun oil cylinders by a system when grouting starts, then opening an A liquid blanking valve (comprising a first blanking valve K7 and a second blanking valve K9), opening an A liquid air valve (comprising a first air valve K13 and a second air valve K14), then starting an A liquid pump (comprising a first A liquid pump 7 and a second A liquid pump 8), and starting to complete A liquid injection. After a set delay time (for example, 5 s), the B liquid valve (including the third air valve K1 and the fourth air valve K4) is opened, then the B liquid pump (including the first B liquid pump 9 and the second B liquid pump 10) is started, and the B liquid injection is started.
When the grouting is stopped, the B liquid pump (including the first B liquid pump 9 and the second B liquid pump 10) is stopped, the B liquid air valve (including the third air valve K1 and the fourth air valve K4) is closed, and the B liquid injection is stopped. After the set delay time (such as 5 s), stopping the liquid pump A (comprising the first liquid pump A7 and the second liquid pump A8), closing the liquid A blanking valve (comprising the first blanking valve K7 and the second blanking valve K9), finally closing the liquid A air valve (comprising the first air valve K13 and the second air valve K14), stopping the injection of the liquid A, and finishing the grouting.
During the injection process, the speed of the pump is manually adjusted, and the flow rate, the numerical value fed back by the pressure sensor and the accumulation of the injection amount are displayed in the touch screen in real time. And the program generates a control command according to the calculated and fed back data, and the command is output to the pump and the air valve to control grouting.
If the system has an alarm, the double-liquid grouting control system stops acting.
2. Cleaning of
The cleaning method adopted by the double-liquid synchronous grouting system of the shield machine comprises a grouting pump cleaning method and a pipeline cleaning method.
The pipeline cleaning method comprises the following steps: closing the grouting gun A5 and the grouting gun B6, opening a first cleaning valve K15 and a second cleaning valve K16, opening a first air valve K13 and a second air valve K14, opening a first recovery control valve K3 and a second recovery control valve K6, starting the clean water pump 16, cleaning the pipelines through a third cleaning branch, a fourth cleaning branch, a part of first grouting pipelines, a part of second grouting pipelines, a first recovery branch and a second recovery branch, stopping cleaning the pipelines when the preset pipeline cleaning time is reached, stopping the clean water pump 16, closing a first cleaning valve K15, a second cleaning valve K16, a first air valve K13, a second air valve K14, a first recovery control valve K3 and a second recovery control valve K6, and then starting cleaning the grouting pump.
The grouting pump cleaning method comprises the following steps: closing the first blanking valve K7 and the second blanking valve K9, opening the first clean water valve K8 and the second clean water valve K10, opening the first cleaning control valve K2 and the second cleaning control valve K5, opening the first recovery control valve K3 and the second recovery control valve K6, starting the clean water pump 16 to clean the grouting pump through the first cleaning branch, the second cleaning branch, part of the first grouting pipeline, part of the second grouting pipeline, the first recovery branch and the second recovery branch, stopping the cleaning of the grouting pump when the preset cleaning time of the grouting pump is reached, stopping the clean water pump 16, and then closing the first clean water valve K8, the second cleaning valve K10, the first cleaning control valve K2, the second cleaning control valve K5, the first recovery control valve K3 and the second recovery control valve K6.
An automatic cleaning mode: and when the automatic injection of the slurry is finished, the system automatically cleans the pipeline according to the slurry injection. And cleaning the grouting pipeline, cleaning the grouting pump after the set cleaning time is reached, and stopping cleaning after the set cleaning time is met. Before cleaning, the system automatically extends the oil cylinder of the grouting gun to the position, opens each air valve, finally starts the clean water pump 16 motor to start cleaning, and discharges waste water into the sewage tank 15 in the cleaning process.
And when the automatic injection of the slurry is finished, the control system automatically cleans the pipeline according to the slurry injection. Firstly, cleaning a grouting pipeline, firstly, extending an oil cylinder of a grouting gun to a position, then opening required valves, starting a cleaning pump for cleaning, stopping the cleaning pump after the set cleaning time is reached, then closing the valves, cleaning the grouting pump, firstly closing a blanking valve, then opening the required valves, starting the cleaning pump for cleaning, stopping the cleaning pump after the set cleaning time is met, then closing the valves, and stopping cleaning.
Manual cleaning mode: and (3) manually injecting grout, selecting a pipeline to be cleaned and the position of the cleaning pipeline (grouting pump/grouting pipeline) in the touch screen after grouting, opening each air valve after grouting cleaning is started, finally starting a clean water pump 16 motor to start cleaning, and discharging wastewater into the sewage tank 15 in the cleaning process.
The method comprises the steps that slurry is injected manually, after grouting is completed, a pipeline to be cleaned and the position of the pipeline to be cleaned (grouting pump/grouting pipeline) are selected in a touch screen, the touch screen selects grouting cleaning to start a cleaning process, a blanking valve is closed firstly when a grouting pump is cleaned, a required valve is opened, a cleaning pump is started to clean, after grouting cleaning is stopped, the cleaning pump is stopped firstly, the valve is closed secondly, a grouting gun oil cylinder is stretched to the position firstly when the grouting pipeline is cleaned, the required valve is opened subsequently, the cleaning pump is started to clean, after grouting cleaning is stopped, the cleaning pump is stopped firstly, the valve is closed again, and cleaning is finished.
As shown in fig. 5, the valve and cylinder sequence for different cleaning positions, whether in automatic or manual mode, is as follows:
cleaning a grouting pipeline: the two grouting gun oil cylinders extend to the positions to close the grouting guns, and the grouting gun oil cylinders are located at the cleaning positions. The first cleaning valve K15, the second cleaning valve K16, the first gas valve K13, the second gas valve K14, the first recovery control valve K3 and the second recovery control valve K6 are opened. And starting the clean water pump 16 to clean the pipeline, closing the clean water pump 16 after cleaning, and then closing the first cleaning valve K15, the second cleaning valve K16, the first air valve K13, the second air valve K14, the first recovery control valve K3 and the second recovery control valve K6.
Cleaning a grouting pump: the first blanking valve K7 and the second blanking valve K9 are closed, and the first clean water valve K8, the second clean water valve K10, the first purge control valve K2, the second purge control valve K5, the first recovery control valve K3, and the second recovery control valve K6 are opened. And starting the clean water pump 16 to clean the grouting pump, closing the clean water pump 16 after cleaning, and then closing the first clean water valve K8, the second clean water valve K10, the first cleaning control valve K2, the second cleaning control valve K5, the first recovery control valve K3 and the second recovery control valve K6.
3. Replenishing and discarding the A liquid
In order to improve the slurry replenishing efficiency and prevent the A liquid from solidifying, the A liquid is directly conveyed to the A liquid box 1 from the ground. When the pulp is supplemented, the abandoning control valve K12 is closed, the pulp supplementing control valve K11 is opened, after the pulp supplementing is finished, the pulp supplementing control valve K11 is closed, the abandoning control valve K12 is opened, and redundant pulp is directly discharged to the sewage tank 15 and cleaned. The purpose of the design is to discharge the retained slurry in the pipeline into the sewage tank 15 in time and clean after slurry supplement is finished, so as to avoid the occurrence of blockage caused by slurry solidification in the slurry conveying pipeline.
The invention uses double-liquid grouting, and can ensure the construction effect by utilizing the characteristics of quick condensation, quick and stable pouring. However, the grout congeals fast and has also brought the risk of stifled pipe for the slip casting pipeline, and consequently, this system has adopted slip casting pipeline segmentation cleaning function, through quick and quick pertinence washing, can be when the water economy resource, effectively wash the remaining grout in the pipeline, avoid the thick liquid deposit to lead to stifled pipe. The slurry replenishing and discarding functions are designed for the slurry replenishing of the liquid A, the slurry reserved in the pipeline can be discharged in time, the blockage of a slurry conveying pipeline is avoided, and the solid guarantee can be provided for the rapid construction of the shield. The invention also introduces a double-liquid grouting manual/automatic control system, which can greatly improve the control efficiency and control precision of double-liquid grouting and ensure the construction quality. The system has very important significance for shield construction.
According to the invention, the slurry is quickly and stably poured and condensed by controlling the double-liquid grouting system, stratum subsidence is avoided, and the construction effect is ensured. In the face of the risk of pipe blockage caused by a grouting pipeline, the grouting pipeline sectional cleaning function is adopted, so that residual slurry in the pipeline can be effectively cleaned, and the condition that the pipe is blocked due to slurry deposition is avoided. The slurry supplementing and discarding functions are designed aiming at slurry supplementing of the liquid A in the construction process, slurry reserved in the pipeline can be discharged in time, the slurry conveying pipeline is prevented from being blocked, and the whole system has high practical value.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a shield constructs two liquid synchronous slip casting systems of machine which characterized in that: the double-liquid synchronous grouting system of the shield machine comprises a liquid A tank for containing grout, a liquid A stirring motor arranged in the liquid A tank and used for stirring the grout, a liquid B tank for containing the grout, a liquid B stirring motor arranged in the liquid B tank and used for stirring the grout, a grouting gun for grouting, a first grouting channel connected between the liquid A tank and the grouting gun for A, a second grouting channel connected between the liquid A tank and the grouting gun for B, a third grouting channel connected between the liquid B tank and the grouting gun for A, a fourth grouting channel connected between the liquid B tank and the grouting gun for B, and a control system;
the first grouting channel comprises a first grouting pipeline, a first blanking valve, a first A liquid pump and a first air valve, the first grouting pipeline is connected between the A liquid tank and the A grouting gun, and the first blanking valve, the first A liquid pump and the first air valve are sequentially arranged on the first grouting pipeline;
the second grouting channel comprises a second grouting pipeline, a second discharging valve, a second A liquid pump and a second air valve, the second grouting pipeline is connected between the A liquid tank and the B grouting gun, and the second discharging valve, the second A liquid pump and the second air valve are sequentially arranged on the second grouting pipeline;
the third grouting channel comprises a third grouting pipeline, a first B liquid pump and a third air valve, the third grouting pipeline is connected between the B liquid tank and the A grouting gun, and the first B liquid pump and the third air valve are sequentially arranged on the third grouting pipeline;
the fourth grouting channel comprises a fourth grouting pipeline, a second B liquid pump and a fourth air valve, the fourth grouting pipeline is connected between the B liquid tank and the B grouting gun, and the second B liquid pump and the fourth air valve are sequentially arranged on the fourth grouting pipeline;
the control system controls the first blanking valve, the first air valve, the second blanking valve, the second air valve, the third air valve, the fourth air valve, the A grouting gun, the B grouting gun, the A liquid stirring motor and the B liquid stirring motor respectively, and the control system further controls the first A liquid pump, the second A liquid pump, the first B liquid pump and the second B liquid pump in a feedback mode respectively.
2. The double-liquid synchronous grouting system of the shield tunneling machine according to claim 1, characterized in that: the control system includes:
the human-computer interface is used for setting grouting target parameters, displaying grouting actual parameters and inputting grouting control instructions;
a PLC controller, configured to generate control signals based on the grouting control command, the grouting target parameters, and the actual grouting parameters, and transmit the control signals to the first baiting valve, the first A liquid pump, the first air valve, the second baiting valve, the second A liquid pump, the second air valve, the first B liquid pump, the third air valve, the second B liquid pump, the fourth air valve, the A grouting gun, the B grouting gun, the A liquid stirring motor, and the B liquid stirring motor;
and the feedback unit is used for feeding back the actual grouting parameters to the PLC.
3. The double-liquid synchronous grouting system of the shield tunneling machine according to claim 2, characterized in that: the human-computer interface is communicated with the PLC through Ethernet, the feedback unit is communicated with the PLC through a CCLINK, and the PLC is communicated with the first blanking valve, the first A liquid pump, the first air valve, the second blanking valve, the second A liquid pump, the second air valve, the first B liquid pump, the third air valve, the second B liquid pump, the fourth air valve, the A grouting gun, the B grouting gun, the A liquid stirring motor and the B liquid stirring motor through the CCLINK.
4. The double-liquid synchronous grouting system of the shield tunneling machine according to claim 2, characterized in that: the feedback unit is including set up in first A liquid flowmeter on the first slip casting pipeline, set up in second A liquid flowmeter on the second slip casting pipeline, set up in first slip casting pressure sensor on the A slip casting rifle, set up in second slip casting pressure sensor on the B slip casting rifle.
5. The double-liquid synchronous grouting system of the shield tunneling machine according to claim 1, characterized in that: the double-liquid synchronous grouting system of the shield machine further comprises a cleaning system; the cleaning system comprises a first cleaning branch connected with a cleaning water source and arranged at the upper part of the first grouting pipeline, a second cleaning branch connected with the cleaning water source and arranged at the upper part of the second grouting pipeline, a third cleaning branch connected with the cleaning water source and arranged at the lower part of the first grouting pipeline, a fourth cleaning branch connected with the cleaning water source and arranged at the lower part of the second grouting pipeline, a sewage tank, a first recovery branch connected with the midstream of the first grouting pipeline and the sewage tank, a second recovery branch connected with the midstream of the second grouting pipeline and the sewage tank, a first clean water valve arranged on the first cleaning branch, a second clean water valve arranged on the second cleaning branch, a first cleaning valve arranged on the third cleaning branch, a second cleaning valve arranged on the fourth cleaning branch, and a first cleaning control valve arranged on the first grouting pipeline, The second cleaning control valve is arranged on the second grouting pipeline, the first recovery control valve is arranged on the first recovery branch, and the second recovery control valve is arranged on the second recovery branch; the first cleaning control valve is arranged at the upstream of the first air valve, the second cleaning control valve is arranged at the upstream of the second air valve, the first recovery branch is connected between the first air valve and the first cleaning control valve, and the second recovery branch is connected between the second air valve and the second cleaning control valve.
6. The double-liquid synchronous grouting system of the shield tunneling machine according to claim 5, characterized in that: the upper stream of the third cleaning branch, which is positioned in front of the first cleaning valve, and the upper stream of the fourth cleaning branch, which is positioned between the second cleaning valves, are combined into a cleaning input branch, and a clean water pump is arranged on the cleaning input branch.
7. The double-liquid synchronous grouting system of the shield tunneling machine according to claim 5, characterized in that: and the downstream of the first recovery branch after the first recovery control valve and the downstream of the second recovery branch after the second recovery control valve are combined into a cleaning output branch.
8. The double-liquid synchronous grouting system of the shield tunneling machine according to claim 1, characterized in that: the double-liquid synchronous grouting system of the shield machine further comprises a liquid A grout supplementing system, wherein the liquid A grout supplementing system comprises a grout supplementing channel connected to the liquid A tank, a grout supplementing control valve arranged on the grout supplementing channel, a abandoning channel branched from the grout supplementing channel and a abandoning control valve arranged on the abandoning channel.
9. The double-liquid synchronous grouting system of the shield tunneling machine according to claim 1, characterized in that: the double-liquid synchronous grouting method adopted by the double-liquid synchronous grouting system of the shield machine comprises a starting grouting method and a stopping grouting method;
the method for starting grouting comprises the following steps: starting the A grouting gun and the B grouting gun, opening the first blanking valve and the second blanking valve, opening the first air valve and the second air valve, starting the first A liquid pump and the second A liquid pump, and starting grouting through the first grouting channel and the second grouting channel; after a set delay time, opening the third air valve and the fourth air valve, starting the first B liquid pump and the second B liquid pump, and starting grouting through the third grouting channel and the fourth grouting channel;
the grouting stopping method comprises the following steps: stopping the first liquid B pump and the second liquid B pump, closing the third air valve and the fourth air valve, and stopping grouting through the third grouting channel and the fourth grouting channel; and after the set delay time, stopping the first liquid pump A and the second liquid pump A, closing the first baiting valve and the second baiting valve, closing the first air valve and the second air valve, and stopping grouting through the first grouting channel and the second grouting channel.
10. The double-liquid synchronous grouting system of the shield tunneling machine according to claim 5, characterized in that: the cleaning method adopted by the double-liquid synchronous grouting system of the shield machine comprises a pipeline cleaning method and a grouting pump cleaning method;
the pipeline cleaning method comprises the following steps: closing the grouting gun A and the grouting gun B, opening the first cleaning valve and the second cleaning valve, opening the first air valve and the second air valve, opening the first recovery control valve and the second recovery control valve, performing pipeline cleaning through the third cleaning branch, the fourth cleaning branch, part of the first grouting pipeline, part of the second grouting pipeline, the first recovery branch and the second recovery branch, and stopping pipeline cleaning when preset pipeline cleaning time is reached;
the grouting pump cleaning method comprises the following steps: close first unloading valve with second unloading valve is opened first clear water valve with the clear water valve of second is opened first washing control valve with second washs the control valve, opens first recovery control valve with the control valve is retrieved to the second, through first washing branch road the second washs branch road, part first slip casting pipeline, part the second slip casting pipeline first recovery branch road the second is retrieved the branch road the second and is retrieved the branch road and carry out the slip casting pump and wash, stops the slip casting pump and wash when reaching predetermined slip casting pump scavenging period.
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| CN202010448937.0A CN111720128A (en) | 2020-05-25 | 2020-05-25 | Double-liquid synchronous grouting system of shield machine |
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| CN202010448937.0A CN111720128A (en) | 2020-05-25 | 2020-05-25 | Double-liquid synchronous grouting system of shield machine |
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Cited By (1)
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