Slurry shield tunneling machine carrying high-pressure jet system and working method of slurry shield tunneling machine

Abstract

The invention belongs to the technical field of underground engineering, and provides a slurry shield tunneling machine carrying a high-pressure jet system and a working method thereof.The slurry shield tunneling machine comprises a cutterhead mechanism, a slurry supply mechanism and a high-pressure jet mechanism, and the slurry supply mechanism and the high-pressure jet mechanism are arranged on the cutterhead mechanism through a rotation center; the high-pressure water supply assembly comprises a first water supply pipe and a second water supply pipe which are connected through a pipeline dynamic and static conversion end. The grinding material supply assembly comprises a first supply pipe connected with the fixed end and a second supply pipe connected with the rotating end; the second water supply pipe and the second material supply pipe are jointly connected with a spray head, the spray head is arranged on the cutter head mechanism, in the soft soil layer construction process, when the cutter head mechanism suddenly encounters hard substances such as stones, high-pressure water and abrasive materials are provided for the spray head through the second water supply pipe and the second material supply pipe, and the hard substances such as the stones are cut in a water jet mode; abrasion and damage to the hob are reduced, and construction efficiency and safety are guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground engineering, and particularly relates to a slurry shield machine equipped with a high-pressure jet system and its working method. Background Art

[0002] Slurry shield machines are mainly applicable to strata such as soft soil layers, sandy soil layers, gravel layers, and pebble-gravel layers, and are particularly suitable for the construction of cross-river tunnels and subsea tunnels with large water content in the strata and large water bodies above.

[0003] Currently, slurry shield machines mainly achieve slurry balance by injecting a slurry mixture into the interior, thereby maintaining pressure and realizing efficient, stable, and safe tunneling in the tunnel plane. However, when encountering complex geological conditions with uneven hardness, such as when suddenly encountering harder stones during the construction process in a soft soil layer, it will cause damage to the cutters or increase the wear probability of the cutters, affecting the construction efficiency and potentially triggering safety risks; in addition to the sudden appearance of stones and other factors affecting the tunneling work, during the tunneling process of the slurry shield machine, the formed mud cake will also affect the injection of slurry and tunneling work. Summary of the Invention

[0004] In order to solve the above problems, the present invention proposes a slurry shield machine equipped with a high-pressure jet system and its working method. During the construction process in a soft soil layer, when the cutter head mechanism suddenly encounters harder substances such as stones, high-pressure water and abrasive are provided to the nozzle through the second water supply pipe and the second feed pipe, and the harder substances such as stones are cut by means of water jet, reducing the wear and damage to the cutters and ensuring the construction efficiency and safety.

[0005] In order to achieve the above object, in the first aspect, the present invention provides a slurry shield machine equipped with a high-pressure jet system, adopting the following technical solutions: A slurry shield machine equipped with a high-pressure jet system includes a cutter head mechanism, as well as a slurry supply mechanism and a high-pressure jet mechanism arranged on the cutter head mechanism through a rotary center; the rotary center includes a fixed end, as well as a pipeline static-dynamic conversion end and a rotating end arranged at both ends of the fixed end; The high-pressure jet mechanism includes a high-pressure water supply component and an abrasive supply component; the high-pressure water supply component includes a first water supply pipe and a second water supply pipe connected through the pipeline static-dynamic conversion end; the abrasive supply component includes a first feed pipe connected to the fixed end and a second feed pipe connected to the rotating end; the rotating end is connected to the cutter head mechanism, and the second water supply pipe and the second feed pipe are commonly connected to a nozzle, and the nozzle is arranged on the cutter head mechanism.

[0006] Further, the muddy water supply mechanism includes a first muddy water supply pipeline and a second muddy water supply pipeline; the first muddy water supply pipeline and the second muddy water supply pipeline are connected through the rotation center.

[0007] Further, the spray head includes a spray head body and a linear nozzle provided on the spray head body.

[0008] Further, a pipeline static-dynamic conversion end is provided at one end of the fixed end away from the rotating end. The first water supply pipe is connected to the fixed end of the pipeline static-dynamic conversion end, and the fixed end of the pipeline static-dynamic conversion end is connected to the fixed end. The rotating end of the pipeline static-dynamic conversion end is connected with a water supply adapter pipe. The second water supply pipe is connected to the pipeline static-dynamic conversion end through the water supply adapter pipe; at one end of the water supply adapter pipe away from the pipeline static-dynamic conversion end, a water supply tap is provided, and a plurality of second water supply pipes are provided on the water supply tap; a fixed bracket is provided between the inner wall of the rotating end and the water supply adapter pipe. The high-pressure water supply assembly includes a plurality of pumps, and the plurality of pumps are connected in series and / or in parallel to form one or more pump groups; one or more pump groups are all connected to the first water supply pipe.

[0009] Further, a first muddy water supply connector is provided on the fixed end, the first muddy water supply pipeline is connected to the first muddy water supply connector, a second muddy water supply connector is provided on the rotating end, and a plurality of second muddy water supply pipelines are connected to the second muddy water supply connector.

[0010] Further, a material bin is provided on the outer wall of the fixed end, and an abrasive outlet is provided on the outer wall of the rotating end; the material bin is communicated with the abrasive outlet, the first feeding pipe is connected to the material bin, and the second feeding pipe is connected to the abrasive outlet.

[0011] Further, the cutter head mechanism includes hob cutters, and a spray head is respectively provided on both sides of the annular cutting line of the hob cutters.

[0012] Further, the cutter head mechanism includes hob cutters, and the spray heads are arranged on the annular cutting line where the hob cutters are located; on the cutter head mechanism, there are also provided one or several of at least one fixed spray head, at least one retractable spray head, at least one rotary spray head, at least one pulsed spray head and at least one oscillating spray head for flushing mud cakes.

[0013] In order to achieve the above object, in a second aspect, the present invention also provides a working method of a muddy water shield machine equipped with a high-pressure jet system, adopting the following technical solutions: A working method for a slurry shield machine equipped with a high-pressure jet system, which adopts the slurry shield machine equipped with a high-pressure jet system as described in the first aspect, includes: during the construction process in soft soil strata, when the cutterhead mechanism suddenly encounters hard substances, high-pressure water and abrasive are provided to the nozzle through the second water supply pipe and the second feed pipe, and the hard substances are cut by means of water jetting.

[0014] Further, when the pressure at the hob is greater than the preset value, the high-pressure jet mechanism is started for auxiliary tunneling and the cutting mode is started; when the pressure at the hob is less than or equal to the preset value and the cutterhead thrust of the shield machine increases to the preset thrust, it is determined that there is a mud cake. At this time, the high-pressure jet mechanism is started and the mud cake flushing mode is entered. No abrasive is provided when the mud cake flushing mode is executed.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, a slurry supply mechanism and a high-pressure jet mechanism are arranged on the cutterhead mechanism through the rotary center; among them, the high-pressure water supply assembly includes a first water supply pipe and a second water supply pipe connected through the dynamic and static conversion end of the pipeline; the abrasive supply assembly includes a first feed pipe connected to the fixed end and a second feed pipe connected to the rotating end; the second water supply pipe and the second feed pipe are commonly connected to a nozzle, and the nozzle is arranged on the cutterhead mechanism. During the construction process in soft soil strata, when the cutterhead mechanism suddenly encounters hard substances such as stones, high-pressure water and abrasive are provided to the nozzle through the second water supply pipe and the second feed pipe, and the hard substances such as stones are cut by means of water jetting, reducing the wear and damage to the hob and ensuring the construction efficiency and safety. Description of the Drawings

[0016] The specification drawings forming a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments and descriptions thereof of this embodiment are used to explain this embodiment and do not constitute an improper limitation to this embodiment.

[0017] Figure 1 It is a schematic diagram of the device structure of Embodiment 1 of the present invention; Figure 2 It is a schematic diagram of the nozzle structure of Embodiment 1 of the present invention; Figure 3 It is a schematic diagram of the rotary center structure of Embodiment 1 of the present invention; Figure 4 It is a sectional view of the rotary center of Embodiment 1 of the present invention; Figure 5 It is a layout diagram of the nozzle position of Embodiment 1 of the present invention; Figure 6 It is a schematic diagram of the action area of the hob of Embodiment 1 of the present invention; Figure 7 It is a schematic diagram of the controller connection of Embodiment 1 of the present invention; Figure 8 Schematic diagram of the action area of the hob in Embodiment 2 of the present invention; Among them, 1. Mud supply mechanism; 101. First mud supply pipeline; 102. Second mud supply pipeline; 2. High-pressure jet mechanism; 201. High-pressure water supply component; 2011. Water supply system; 2012. First water supply pipe; 2013. Water supply tap; 2014. Second water supply pipe; 202. Abrasive supply component; 2021. Feeding system; 2022. First feeding pipe; 2023. Second feeding pipe; 203. Nozzle; 2031. Nozzle body; 2032. Linear nozzle; 2033. Inclined nozzle; 3. Rotary center; 301. Fixed end; 3011. Dynamic and static conversion end of pipeline; 3012. First mud supply connection head; 3013. Silo; 302. Rotating end; 3021. Abrasive outlet; 3022. Water supply adapter; 3023. Fixed bracket; 3024. Second mud supply connection head; 4. Cutter head mechanism; 401. Cutter head body; 402. Slag outlet; 403. Hob; 5. Controller; 6. Sensor. Detailed implementation mode

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the following detailed description is exemplary and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0020] Embodiment 1: Common tunneling methods are mainly divided into the drill and blast method and the tunneling machine construction method. The drill and blast method has a low degree of mechanization in tunnel construction. It mainly relies on manual operation of machinery for drilling and blasting to excavate the tunnel, with high risks and long cycles. The tunneling machine construction method has a high degree of mechanization. When tunneling in ordinary hard rock tunnels, the daily footage can reach 30 - 40 m / d, which is 3 - 10 times the construction speed of the drill and blast method, and it has significant advantages in terms of the safety of on-site operators. However, when a full-face tunnel boring machine tunnels in extremely complex geological conditions such as hard rock, ultra-hard rock, and highly abrasive strata, prominent problems often occur, such as insufficient rock-breaking ability of mechanical cutters, increased tool wear, and a high proportion of tool-changing time, which severely restricts the on-site construction efficiency. In order to improve the rock-breaking ability of full-face tunnel boring machines, many domestic and foreign scientific research and production institutions have continuously carried out research on efficient rock-breaking and formed many new rock-breaking methods. Among them, the high-pressure water jet technology has the characteristics of being clean, environmentally friendly, low-energy, efficient, and easy to implement, and has a rich practical basis, and is considered to be a very promising rock-breaking method. By using the beneficial superposition of the rock-breaking effects of high-pressure water jets and mechanical cutters, the penetration of mechanical cutters can be increased, the tool wear rate can be reduced, and the tunneling efficiency can be greatly improved. Therefore, the high-pressure water jet assisted rock-breaking technology has high research and application value in the field of high-efficiency tunnel tunneling.

[0021] As recorded in the background technology, the slurry shield machine is mainly applicable to strata such as soft soil strata, sandy soil strata, gravel strata, and pebble-gravel strata. Through the action of mechanical cutters, it can fully realize the tunneling of soft soil strata, sandy soil strata, etc., without the assistance of high-pressure water jets. However, in actual work, the inventor found that when the current slurry shield machine encounters relatively hard substances such as hard stones during the construction process in soft soil strata, it will damage the hob or increase the wear probability of the hob, affecting the construction efficiency and possibly causing safety risks.

[0022] Based on this, as Figure 1 shown, this embodiment provides a slurry shield machine equipped with a high-pressure jet system, including a slurry supply mechanism 1, a high-pressure jet mechanism 2, a rotary center 3, a cutter head mechanism 4, etc.

[0023] As Figure 1 described, the slurry supply mechanism 1 includes a first slurry supply pipeline 101, a second slurry supply pipeline 102, etc. It can be understood that one end of the first slurry supply pipeline 101 is connected to the slurry supply system to achieve the supply of slurry. The slurry supply system is a conventional technology and will not be elaborated here; the first slurry supply pipeline 101 and the second slurry supply pipeline 102 are connected through the rotary center 3 to achieve the purpose of static-dynamic conversion of the slurry.

[0024] As Figure 1 shown, the high-pressure jet mechanism 2 includes a high-pressure water supply component 201, an abrasive supply component 202, and a nozzle 203.

[0025] As Figure 1 shown, the high-pressure water supply assembly 201 is used to supply high-pressure water for the water jet of the nozzle 203; the high-pressure water supply assembly 201 includes a water supply system 2011, a first water supply pipe 2012, a water supply tap 2013, a second water supply pipe 2014, etc. The water supply system 2011 provides a system for the water source and power source of high-pressure water, which can be realized by existing technologies and will not be elaborated here; the first water supply pipe 2012 and the second water supply pipe 2014 are connected through the rotation center 3 to realize the dynamic-static conversion during the high-pressure water transmission process.

[0026] In some embodiments, a plurality of pumps are provided in the water supply system 2011, and the plurality of pumps are connected in series and / or in parallel to form one or more pump groups; one or more pump groups are all connected to the first water supply pipe 2012 to provide sufficient ultra-high pressure and large flow power.

[0027] As Figure 1 shown, the abrasive supply assembly 202 includes a feeding system 2021, a first feeding pipe 2022 and a second feeding pipe 2023; the feeding system 2021 is used to supply abrasives, and may include components such as a tank body and a high-pressure pump, which can be realized by conventional technologies and will not be elaborated here; the first feeding pipe 2022 and the second feeding pipe 2023 are connected through the rotation center 3 to realize the dynamic-static conversion during the abrasive transmission process.

[0028] As Figure 1 and Figure 2 shown, the second water supply pipe 2014 and the second feeding pipe 2023 are commonly connected to the nozzle 203. The nozzle 203 is used to provide the final high-pressure water jet for cutting; optionally, the nozzle 203 includes a nozzle body 2031 and a linear nozzle 2032 provided on the nozzle body 2031.

[0029] As Figure 3 and Figure 4 shown, the rotation center 3 includes a fixed end 301 and a rotating end 302 that are rotatably connected; the rotating end 302 is connected to the cutter head mechanism 4, and during the working process, the rotating end 302 rotates following the cutter head mechanism 4 to realize the dynamic-static conversion.

[0030] One end of the fixed end 301 away from the rotating end 302 is provided with a pipeline dynamic-static conversion end 3011, which can adopt components such as rotary joints and rotating joints. The first water supply pipe 2012 is connected to the fixed end of the pipeline dynamic-static conversion end 3011, and the fixed end of the pipeline dynamic-static conversion end 3011 is connected to the fixed end 301. The rotating end of the pipeline dynamic-static conversion end 3011 is connected with a water supply transfer pipe 3022, and the second water supply pipe 2014 is connected to the pipeline dynamic-static conversion end 3011 through the water supply transfer pipe 3022. During operation, the rotating end 302 rotates, driving the second water supply pipe 2014 and the water supply transfer pipe 3022 to rotate. The water supply transfer pipe 3022 is located in a preset through hole in the middle of the rotation center 3, and is not affected by other seals and the like, so as to ensure the water supply pressure. One end of the water supply transfer pipe 3022 away from the pipeline dynamic-static conversion end 3011 is provided with a water supply branch joint 2013, and a plurality of second water supply pipes 2014 are arranged on the water supply branch joint 2013. In order to improve the stability of the water supply transfer pipe 3022 and reduce problems such as vibration during water supply, a fixed bracket 3023 is arranged between the inner wall of the rotating end 302 and the water supply transfer pipe 3022, and the fixed bracket 3023 can be a metal triangular bracket or other brackets optionally.

[0031] A first muddy water supply connection head 3012 is arranged on the fixed end 301, which can be a tee joint optionally. The first muddy water supply pipeline 101 is connected to the first muddy water supply connection head 3012, and a preset through hole in the middle of the rotation center 3 is also connected to the first muddy water supply connection head 3012 to realize the supply of muddy water and achieve dynamic-static conversion through the rotation center 3. Optionally, the pipeline dynamic-static conversion end 3011 is arranged on the first muddy water supply connection head 3012. Correspondingly, a second muddy water supply connection head 3024 is arranged on the rotating end 302. Optionally, a plurality of second muddy water supply pipelines 102 are connected to the second muddy water supply connection head 3024, and the second muddy water supply pipelines 102 finally transmit the muddy water to the cutter head mechanism 4 to achieve the purpose of pressure balance tunneling.

[0032] A material bin 3013 is provided on the outer wall of the fixed end 301, and an abrasive outlet 3021 is provided on the outer wall of the corresponding rotating end 302; the material bin 3013 is communicated with the abrasive outlet 3021 to realize the static-dynamic conversion of abrasive transmission; the rotation structure and principle of the fixed end 301 and the rotating end 302 can be realized through a conventional rotation center. The first feeding pipe 2022 is connected to the material bin 3013, and the second feeding pipe 2023 is connected to the abrasive outlet 3021. During operation, the abrasive flows from the feeding system 2021 to the first feeding pipe 2022, and then flows into the second feeding pipe 2023 after static-dynamic conversion. The abrasive in the second feeding pipe 2023 finally flows to the nozzle 203, and the overall structure is simple.

[0033] As Figure 1 shown, the cutter head mechanism 4 includes a cutter head body 401, and a plurality of slag outlets 402 and hob cutters 403 provided on the cutter head body 401.

[0034] Optionally, in some embodiments, as Figure 5 and Figure 6 shown, on the circumferential annular cutting line, one nozzle 203 is respectively provided on both sides of the hob cutter 403. When relatively hard substances such as stones appear, the two nozzles 203 perform jet cutting on the stones along the circumferential direction, so that the stones are divided into multiple regions on the cutting surface, reducing the cutting difficulty. Then, the hob cutter 403 cuts the part between the two jet cutting lines, realizing the rapid destruction of the whole stone, and improving the cutting efficiency and tunneling efficiency.

[0035] As Figure 7 shown, a sensor 6, such as a pressure sensor, is provided on the hob cutter 403, and the sensor 6 is connected to a controller 5; the controller 5 is also connected to the mud supply mechanism 1, the high-pressure jet mechanism 2, etc. Optionally, when the controller 5 determines that the pressure detected by the sensor 6 is greater than a preset value, it is determined that relatively hard substances such as stones appear. At this time, the high-pressure jet mechanism 2 is started for auxiliary tunneling until the pressure is less than or equal to the preset value, and then the high-pressure jet mechanism 2 is closed.

[0036] In some other embodiments, when it is determined that the difference between the current pressure and the preset value is less than a preset difference, and the rising rate of the detected pressure is higher than a preset rate, it is determined that relatively hard substances such as stones will appear soon. At this time, the high-pressure jet mechanism 2 is started in advance for auxiliary tunneling, avoiding the phenomenon that the high-pressure jet mechanism 2 is started after the hob cutter 403 contacts the stone, and avoiding the wear or damage problem when the hob cutter 403 initially contacts the stone.

[0037] In some other embodiments, when the high-pressure jet mechanism 2 is started, the increased pressure magnitude is compensated by controlling the change in the supply pressure of the mud and water supply mechanism 1, so as to avoid affecting the balanced cutting of the mud and water.

[0038] Embodiment 2: This embodiment provides a slurry shield machine equipped with a high-pressure jet system. As Figure 8 shown, different from Embodiment 1, on the circumferential annular cutting line, nozzles 203 are arranged on the cutting line trajectory where the hob 403 is located. When encountering relatively hard substances such as stones, the nozzles 203 perform jet cutting on the stones along the circumferential direction, so that the stones are divided into multiple regions on the cutting surface, reducing the cutting difficulty. Then, the hob 403 cuts the part of the jet cutting line, reducing the wear degree of the hob 403.

[0039] Embodiment 3: This embodiment provides a working method for a slurry shield device equipped with a high-pressure jet system, which adopts the slurry shield machine equipped with a high-pressure jet system as described in Embodiment 1 or Embodiment 2, including: during the construction process in soft soil strata, when the cutterhead mechanism 4 suddenly encounters hard substances, high-pressure water and abrasive are provided to the nozzles 203 through the second water supply pipe 2014 and the second material supply pipe 2023, and the hard substances are cut by means of water jet.

[0040] Embodiment 4: This embodiment provides a working method for a slurry shield device equipped with a high-pressure jet system, which adopts the slurry shield machine equipped with a high-pressure jet system as described in Embodiment 1 or Embodiment 2; in this embodiment, in addition to arranging the nozzles 203, the slurry shield device is also provided with nozzles for flushing the mud cake. The nozzles for flushing the mud cake can be realized by conventional nozzles. For example, the nozzles are inclined, and when flushing the mud cake, the water jet can spray onto the mud cake on the cutterhead body 401. In some embodiments, the nozzles for flushing the mud cake can adopt one or several of fixed nozzles, retractable nozzles, rotary nozzles, pulsed nozzles and oscillating nozzles, so as to achieve the purposes of reducing blind areas, increasing the flushing range and increasing the flushing force.

[0041] Fixed spray nozzles, retractable spray nozzles, rotary spray nozzles, pulsed spray nozzles, and oscillating spray nozzles can use conventional spray nozzles; or, in some other embodiments, the retractable spray nozzle may include an oil cylinder or other telescopic device, and a spray nozzle on the oil cylinder or other telescopic device. The water inlet pipe of the spray nozzle can be arranged at the end of the telescopic rod of the telescopic device to avoid being affected by the telescopic movement; a structure such as a sealed telescopic rod can also be arranged in the middle of the telescopic device. The rotary spray nozzle can be a spray nozzle that can automatically rotate around its vertical axis relying on water pressure. Or, a structure including a rotating part and a nozzle is adopted. The rotating part uses a power source such as a rotating motor, and a conversion head or conversion part is set to realize the transmission of water flow during rotation. By setting the rotary spray nozzle, 360° water jet spraying can be realized, increasing the flushing range. Optionally, for the pulsed spray nozzle, a switch is arranged on one or more water supply pipes. The switch is a controllable switch, which is opened and closed according to a preset frequency to realize the pulsed spraying of the water jet, improving the effect of flushing the mud cake. For the oscillating spray nozzle, a motor or other power equipment can be set so that the spray nozzle can swing at a certain angle and trajectory during spraying, improving the effect of flushing the mud cake.

[0042] Based on the slurry shield device in this embodiment, during operation, a cutting mode and a mud cake flushing mode are set. Specifically, when the controller 5 determines that the pressure detected by the sensor 6 is greater than the preset value, it is determined that there are hard substances such as stones. At this time, the high-pressure jet mechanism 2 is started for auxiliary tunneling, and the cutting mode is started; when the controller 5 determines that the pressure detected by the sensor 6 is not greater than the preset value, it is determined that there is no hard rock, and the thrust of the cutter head of the shield machine increases. After the thrust of the cutter head of the shield machine increases to the preset thrust, it is determined that there is a mud cake. At this time, the high-pressure jet mechanism 2 is started to enter the mud cake flushing mode, and the mud cake is flushed through the spray nozzle for flushing the mud cake; it can be understood that the water pressure during the execution of the mud cake flushing mode is less than the water pressure during the cutting mode, and no abrasive is provided during the execution of the mud cake flushing mode.

[0043] In order to reduce the use of the number of spray nozzles, in some embodiments, an inclined nozzle 2033 is arranged on the side of the spray nozzle body 2031; in the first working condition, the linear nozzle 2032 and the inclined nozzle 2033 can spray water simultaneously for mud cake flushing. At this time, the water jet of the linear nozzle 2032 does not have the effect of flushing the mud cake; in the second working condition, switches are arranged at both the linear nozzle 2032 and the inclined nozzle 2033. The switch at the linear nozzle 2032 is closed, and the switch at the inclined nozzle 2033 is opened for mud cake flushing, avoiding the waste of the water jet of the inclined nozzle 2033; in the third working condition, the switch at the linear nozzle 2032 is opened, and the switch at the inclined nozzle 2033 is closed for the cutting work of auxiliary tunneling.

[0044] The above are only the preferred embodiments of this embodiment and are not intended to limit this embodiment. For those skilled in the art, this embodiment can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this embodiment shall be included within the protection scope of this embodiment.

Claims

1. A slurry shield machine equipped with a high-pressure jet system, characterized in that: It includes a cutter disc mechanism, and a mud and water supply mechanism and a high-pressure jet mechanism arranged on the cutter disc mechanism through a rotation center; the rotation center includes a fixed end, and a pipeline dynamic-static conversion end and a rotating end arranged at both ends of the fixed end; The high-pressure jet mechanism includes a high-pressure water supply assembly and an abrasive supply assembly; the high-pressure water supply assembly includes a first water supply pipe and a second water supply pipe connected through the dynamic-static conversion end of the pipeline; the abrasive supply assembly includes a first supply pipe connected to the fixed end, and a second supply pipe connected to the rotating end; the rotating end is connected to the cutter disc mechanism, and the second water supply pipe and the second supply pipe are commonly connected to a nozzle, and the nozzle is arranged on the cutter disc mechanism.

2. A slurry shield machine equipped with a high-pressure jet system as claimed in claim 1, characterized in that: The muddy water supply mechanism comprises a first muddy water supply pipeline and a second muddy water supply pipeline; the first muddy water supply pipeline and the second muddy water supply pipeline are connected through the rotation center.

3. A slurry shield machine equipped with a high-pressure jet system as claimed in claim 1, characterized in that: The nozzle comprises a nozzle body and a linear nozzle arranged on the nozzle body.

4. A slurry shield machine equipped with a high-pressure jet system as claimed in claim 1, characterized in that: The fixed end is provided with a pipeline static-dynamic conversion end at one end away from the rotating end, the first water supply pipe is connected to the fixed end of the pipeline static-dynamic conversion end, and the fixed end of the pipeline static-dynamic conversion end is connected to the fixed end, the rotating end of the pipeline static-dynamic conversion end is connected to a water supply transfer tube, and the second water supply pipe is connected to the pipeline static-dynamic conversion end through the water supply transfer tube; the water supply transfer tube is provided with a water supply joint at one end away from the pipeline static-dynamic conversion end, and a plurality of second water supply pipes are provided on the water supply joint; a fixed bracket is provided between the inner wall of the rotating end and the water supply transfer tube; The high-pressure water supply assembly includes a plurality of pumps, which are connected in series and / or in parallel to form one or more pump groups; and the one or more pump groups are all connected to the first water supply pipe.

5. A slurry shield machine equipped with a high-pressure jet system as claimed in claim 2, characterized in that: The fixed end is provided with a first muddy water supply connector, the first muddy water supply pipeline is connected to the first muddy water supply connector, and the rotating end is provided with a second muddy water supply connector, a plurality of second muddy water supply pipelines are connected to the second muddy water supply connector.

6. A slurry shield machine equipped with a high-pressure jet system as claimed in claim 1, characterized in that: A material bin is arranged on the outer wall of the fixed end, and an abrasive outlet is arranged on the outer wall of the rotating end; the material bin is communicated with the abrasive outlet, the first feed pipe is connected with the material bin, and the second feed pipe is connected with the abrasive outlet.

7. A slurry shield machine equipped with a high-pressure jet system as claimed in claim 1, characterized in that: The cutter disc mechanism comprises a roller cutter, and a nozzle is respectively arranged on both sides of the annular cutting line of the roller cutter.

8. The slurry shield machine equipped with a high-pressure jet system according to claim 1, characterized in that: The cutter disc mechanism includes a roller cutter, and the nozzle is arranged on the annular cutting line where the roller cutter is located; the cutter disc mechanism is also provided with one or more of at least one fixed nozzle, at least one retractable nozzle, at least one rotating nozzle, at least one pulse nozzle and at least one swinging nozzle for flushing the mud cake.

9. A method for installing a slurry shield equipped with a high-pressure jet system, characterized in that: A slurry shield machine equipped with a high-pressure jet system as described in any one of claims 1 to 8 is adopted, comprising: during construction in soft soil strata, when the cutter head mechanism suddenly encounters hard matter, high-pressure water and abrasive are provided to the nozzle through a second water supply pipe and a second material supply pipe, and the hard matter is cut by means of a water jet.

10. A method for installing a slurry shield equipped with a high-pressure jet system as claimed in claim 9, characterized in that: When the pressure at the roller cutter is greater than the preset value, the high-pressure jet mechanism is started to assist excavation and the cutting mode is started; when the pressure at the roller cutter is less than or equal to the preset value, and the thrust of the shield machine cutter head increases to the preset thrust, it is judged that there is a mud cake. At this time, the high-pressure jet mechanism is started and the mud cake flushing mode is entered. No abrasive is provided when the mud cake flushing mode is executed.

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