A slurry shield machine equipped with a high-pressure jet system and a working method thereof

Abstract

The present invention belongs to the technical field of underground engineering, and proposes a slurry shield machine equipped with a high-pressure jet system and a working method thereof, comprising a cutterhead mechanism, and a slurry water supply mechanism and a high-pressure jet mechanism arranged on the cutterhead mechanism through a rotation center; wherein the high-pressure water supply component comprises a first water supply pipe and a second water supply pipe connected through a dynamic-static conversion end of the pipeline; the abrasive supply component comprises a first supply pipe connected to the fixed end, and a second supply pipe connected to the rotating end; the second water supply pipe and the second supply pipe are commonly connected to a nozzle, and the nozzle is arranged on the cutterhead mechanism. During construction in soft soil layers, when the cutterhead mechanism suddenly encounters harder materials such as stones, high-pressure water and abrasive are supplied to the nozzle through the second water supply pipe and the second supply pipe, and harder materials such as stones are cut by water jets, thereby reducing wear and damage to the roller cutter and ensuring construction efficiency and safety.

Description

Technical Field

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

[0002] Slurry shield machines are mainly suitable for soft soil, sandy soil, gravel and pebble gravel strata, and are especially suitable for the construction of cross-river tunnels and submarine tunnels with high water content in the strata and large water bodies above.

[0003] At present, slurry shield machines mainly rely on flushing mud mixtures into the interior to achieve mud-water balance, thereby maintaining pressure and realizing efficient, stable and safe tunneling on the tunnel plane. However, when encountering complex geological conditions, uneven hardness, and soft and hard geological conditions, for example, during the construction process of soft soil layers, when harder stones suddenly appear, it will damage the cutter or increase the probability of cutter wear, affecting construction efficiency and possibly causing safety risks; in addition to the sudden appearance of stones and other factors affecting tunneling work, the mud cake formed during the tunneling process of the slurry shield machine will also affect the mud flushing 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 a working method thereof. During the construction process in soft soil layers, when the cutterhead mechanism suddenly encounters harder materials such as stones, high-pressure water and abrasives are provided to the nozzle through the second water supply pipe and the second material supply pipe. The harder materials such as stones are cut by water jets, reducing the wear and damage to the roller cutter, thereby ensuring construction efficiency and safety.

[0005] In order to achieve the above objectives, in a first aspect, the present invention provides a slurry shield machine equipped with a high-pressure jet system, which adopts the following technical solutions:

[0006] A slurry shield machine equipped with a high-pressure jet system includes a cutterhead mechanism, and a slurry supply mechanism and a high-pressure jet mechanism arranged on the cutterhead mechanism via 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;

[0007] 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.

[0008] Furthermore, 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.

[0009] Furthermore, the nozzle includes a nozzle body and a linear nozzle arranged on the nozzle body.

[0010] Furthermore, the fixed end is provided with a pipeline dynamic-static conversion end at one end away from the rotating end, the first water supply pipe is connected to the fixed end of the pipeline dynamic-static conversion end, and the fixed end of the pipeline dynamic-static conversion end is connected to the fixed end, the rotating end of the pipeline dynamic-static conversion end is connected to a water supply transfer pipe, and the second water supply pipe is connected to the pipeline dynamic-static conversion end through the water supply transfer pipe; the water supply transfer pipe is provided with a water supply joint at one end away from the pipeline dynamic-static 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 pipe;

[0011] 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.

[0012] Furthermore, a first muddy water supply connector is provided on the fixed end, and 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.

[0013] Furthermore, a silo 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 silo is communicated with the abrasive outlet, the first feed pipe is connected to the silo, and the second feed pipe is connected to the abrasive outlet.

[0014] Furthermore, the cutter disc mechanism includes a hob, and a nozzle is respectively provided on both sides of the annular cutting line of the hob.

[0015] Furthermore, 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 oscillating nozzle for flushing the mud cake.

[0016] In order to achieve the above-mentioned purpose, in a second aspect, the present invention further provides a method for operating a slurry shield machine equipped with a high-pressure jet system, which adopts the following technical solutions:

[0017] A method for operating a slurry shield machine equipped with a high-pressure jet system adopts the slurry shield machine equipped with a high-pressure jet system as described in the first aspect, including: during construction in soft soil layers, when the cutter head mechanism suddenly encounters hard material, high-pressure water and abrasive are supplied to the nozzle through a second water supply pipe and a second material supply pipe, and the hard material is cut by water jet.

[0018] Furthermore, 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.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, a mud and water supply mechanism and a high-pressure jet mechanism are provided on the cutter disc mechanism through the rotation center; wherein, 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 second water supply pipe and the second supply pipe are commonly connected to a nozzle, and the nozzle is provided on the cutter disc mechanism. During the construction process of soft soil strata, when the cutter disc mechanism suddenly encounters harder materials such as stones, high-pressure water and abrasive are supplied to the nozzle through the second water supply pipe and the second supply pipe, and harder materials such as stones are cut by water jets, thereby reducing wear and damage to the roller cutter and ensuring construction efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the specification of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments and descriptions of this embodiment are used to explain this embodiment and do not constitute an improper limitation on this embodiment.

[0022] Figure 1 Schematic diagram of the device structure of Example 1 of the present invention;

[0023] Figure 2 Schematic diagram of the nozzle structure of Example 1 of the present invention;

[0024] Figure 3 Schematic diagram of the rotation center structure of Example 1 of the present invention;

[0025] Figure 4 This is a cross-sectional view of the rotation center of Example 1 of the present invention;

[0026] Figure 5 This is a nozzle position layout diagram of Example 1 of the present invention;

[0027] Figure 6Schematic diagram of the hob action area of ​​embodiment 1 of the present invention;

[0028] Figure 7 This is a schematic diagram of controller connection according to embodiment 1 of the present invention;

[0029] Figure 8 Schematic diagram of the hob action area of ​​embodiment 2 of the present invention;

[0030] Among them, 1. mud and water supply mechanism; 101. first mud and water supply pipeline; 102. second mud and water supply pipeline; 2. high-pressure jet mechanism; 201. high-pressure water supply assembly; 2011. water supply system; 2012. first water supply pipe; 2013. water supply joint; 2014. second water supply pipe; 202. abrasive supply assembly; 2021. feeding system; 2022. first feeding pipe; 2023. second feeding pipe; 203. nozzle; 2031. nozzle body; 20 32. Linear nozzle; 2033. Inclined nozzle; 3. Center of rotation; 301. Fixed end; 3011. Static-dynamic conversion end of the pipeline; 3012. First mud and water supply connector; 3013. Material silo; 302. Rotating end; 3021. Abrasive outlet; 3022. Water supply transfer pipe; 3023. Fixed bracket; 3024. Second mud and water supply connector; 4. Cutterhead mechanism; 401. Cutterhead body; 402. Slag outlet; 403. Hob; 5. Controller; 6. Sensor. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0033] Example 1:

[0034] Common tunneling methods are mainly divided into drill-and-blast and roadheader (TBM) construction. Drill-and-blast tunnel construction is less mechanized, relying primarily on manually operated mechanical drilling and blasting to excavate the tunnel, which carries high risks and a long construction period. TBM construction, on the other hand, is highly mechanized, achieving daily advances of 30-40 m / d in standard hard rock tunnels—3-10 times the speed of DBM construction—and offers significant advantages in terms of on-site operator safety. However, when tunneling in extremely complex geological conditions, such as hard and ultra-hard rock and highly abrasive formations, full-face TBMs often face challenges such as insufficient rock-breaking capacity of mechanical cutters, increased tool wear, and high tool change times, severely limiting on-site construction efficiency. To improve the rock-breaking capabilities of full-face TBMs, numerous research and production institutions at home and abroad have continuously conducted research on efficient rock-breaking and developed numerous new rock-breaking methods. Among these, high-pressure water jetting technology is considered a highly promising rock-breaking method due to its clean, environmentally friendly, low-energy, high-efficiency, and ease of implementation, as well as its extensive practical experience. The beneficial synergy of high-pressure water jets and mechanical cutter rock-breaking can increase mechanical cutter penetration, reduce cutter wear, and significantly improve tunneling efficiency. Therefore, high-pressure water jet-assisted rock-breaking technology has high research and application value in the field of efficient tunneling.

[0035] As described in the background technology, slurry shield machines are primarily suitable for use in soft soil, sandy soil, gravel, and pebble-gravel formations. Using mechanical cutters, they are fully capable of tunneling through soft soil and sandy soil, without the assistance of high-pressure water jets. However, in actual practice, the inventors have discovered that when a slurry shield machine is used in soft soil, the sudden presence of hard objects such as hard rocks can damage the cutters and increase the likelihood of cutter wear, impacting construction efficiency and potentially posing safety risks.

[0036] Based on this, Figure 1 As 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 rotation center 3 and a cutterhead mechanism 4.

[0037] like Figure 1 The muddy water supply mechanism 1 includes a first muddy water supply pipeline 101 and a second muddy water supply pipeline 102. It is understood that one end of the first muddy water supply pipeline 101 is connected to a muddy water supply system to supply muddy water. The muddy water supply system is conventional technology and will not be described in detail here. The first muddy water supply pipeline 101 and the second muddy water supply pipeline 102 are connected via a rotation center 3, achieving the purpose of switching between dynamic and static muddy water.

[0038] like Figure 1 As shown, the high-pressure jet mechanism 2 includes a high-pressure water supply component 201 , an abrasive supply component 202 and a nozzle 203 .

[0039] like Figure 1 As shown, the high-pressure water supply assembly 201 is used to provide high-pressure water for the water jet to 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 joint 2013, and a second water supply pipe 2014. The water supply system 2011 provides both the water source and the power source for the high-pressure water and can be implemented using existing technologies, which will not be described in detail here. The first water supply pipe 2012 and the second water supply pipe 2014 are connected via the rotation center 3, enabling dynamic and static switching during the high-pressure water transmission process.

[0040] In some embodiments, the water supply system 2011 is provided with multiple pumps, which are connected in series and / or in parallel to form one or more pump groups; one or more pump groups are connected to the first water supply pipe 2012 to provide sufficient ultra-high pressure and large flow power.

[0041] like Figure 1 As 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 provide abrasives, and may include components such as a tank body and a high-pressure pump, which may be implemented by conventional technology and will not be described in detail here; the first feeding pipe 2022 and the second feeding pipe 2023 are connected through the rotation center 3 to realize the dynamic and static conversion of the abrasive transmission process.

[0042] like Figure 1 and Figure 2 As shown, the second water supply pipe 2014 and the second material supply pipe 2023 are 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.

[0043] like Figure 3 and Figure 4 As 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 with the cutter head mechanism 4 to achieve dynamic and static conversion.

[0044] The fixed end 301, away from the rotating end 302, is provided with a pipeline static-dynamic conversion end 3011, which can be a rotary joint or other components. The first water supply pipe 2012 is connected to the fixed end of the pipeline static-dynamic conversion end 3011, and the fixed end of the pipeline static-dynamic conversion end 3011 is connected to the fixed end 301. The rotating end of the pipeline static-dynamic conversion end 3011 is connected to a water supply transfer pipe 3022, and the second water supply pipe 2014 is connected to the pipeline static-dynamic conversion end 3011 via 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 through hole preset in the center of the rotation center 3, is not affected by other sealing components, and can ensure water supply pressure. The water supply transfer tube 3022 is provided at one end away from the pipeline's static-dynamic conversion end 3011 with the water supply joint 2013. Multiple second water supply pipes 2014 are provided on the water supply joint 2013. To improve the stability of the water supply transfer tube 3022 and reduce vibration and other issues during water supply, a fixing bracket 3023 is provided between the inner wall of the rotating end 302 and the water supply transfer tube 3022. The fixing bracket 3023 can be a metal triangular bracket or other bracket.

[0045] The fixed end 301 is provided with a first muddy water supply connector 3012, which can optionally be a tee. The first muddy water supply pipeline 101 is connected to the first muddy water supply connector 3012, and the pre-set through-hole in the center of the rotation center 3 is also connected to the first muddy water supply connector 3012, realizing muddy water supply and achieving dynamic-static conversion through the rotation center 3. Optionally, the pipeline dynamic-static conversion end 3011 is provided on the first muddy water supply connector 3012. Correspondingly, the rotating end 302 is provided with a second muddy water supply connector 3024. Optionally, multiple second muddy water supply pipelines 102 are connected to the second muddy water supply connector 3024. The second muddy water supply pipelines 102 ultimately transmit the muddy water to the cutterhead mechanism 4, achieving the purpose of pressure-balanced excavation.

[0046] A hopper 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 hopper 3013 is connected to the abrasive outlet 3021 to achieve dynamic-static conversion of abrasive transmission; the rotation structure and principle of the fixed end 301 and the rotating end 302 can be achieved by a conventional rotation center. The first feed pipe 2022 is connected to the hopper 3013, and the second feed pipe 2023 is connected to the abrasive outlet 3021. During operation, the abrasive flows from the feed system 2021 to the first feed pipe 2022, and then flows into the second feed pipe 2023 after dynamic-static conversion. The abrasive in the second feed pipe 2023 eventually flows to the nozzle 203, and the overall structure is simple.

[0047] like Figure 1 As shown, the cutter head mechanism 4 includes a cutter head body 401 , and a plurality of slag outlets 402 and roller cutters 403 provided on the cutter head body 401 .

[0048] Optionally, in some embodiments, Figure 5 and Figure 6 As shown, on the circumferential annular cutting line, a nozzle 203 is set on both sides of the roller cutter 403. When a hard material such as a stone appears, the two nozzles 203 perform jet cutting on the stone in the circumferential direction, so that the stone is divided into multiple areas on the cut surface, reducing the cutting difficulty. Then the roller cutter 403 cuts the area between the two jet cutting lines, achieving rapid destruction of the stone as a whole, thereby improving cutting efficiency and excavation efficiency.

[0049] like Figure 7 As shown, the cutter head 403 is provided with a sensor 6, such as a pressure sensor, which is connected to a controller 5. The controller 5 is also connected to the mud and water supply mechanism 1 and the high-pressure jet mechanism 2. Optionally, when the controller 5 determines that the pressure detected by the sensor 6 is greater than a preset value, it determines that a hard material such as a rock is present, and activates the high-pressure jet mechanism 2 to assist in excavation. The high-pressure jet mechanism 2 is then deactivated when the pressure is less than or equal to the preset value.

[0050] In some other embodiments, when it is determined that the difference between the current pressure and the preset value is less than the preset difference, and the detection pressure increase rate is higher than the preset rate, it is determined that harder materials such as stones are about to appear. At this time, the high-pressure jet mechanism 2 is started in advance to assist in excavation, thereby avoiding the phenomenon of starting the high-pressure jet mechanism 2 after the roller 403 contacts the stone, and avoiding wear or damage problems when the roller 403 initially contacts the stone.

[0051] In some other embodiments, when the high-pressure jet mechanism 2 is activated, the increased pressure is compensated by controlling the change in the supply pressure of the mud and water supply mechanism 1 to avoid affecting the mud and water balance cutting.

[0052] Example 2:

[0053] This embodiment provides a slurry shield machine equipped with a high-pressure jet system, such as Figure 8 As shown, the difference from Example 1 is that on the circumferential annular cutting line, a nozzle 203 is set on the cutting line trajectory where the hob 403 is located. When a harder material such as a stone appears, the nozzle 203 performs jet cutting on the stone along the circumferential direction, so that the stone is divided into multiple areas on the cut surface, reducing the difficulty of cutting. Then the hob 403 cuts the jet cutting line part, reducing the degree of wear on the hob 403.

[0054] Example 3:

[0055] This embodiment provides a working method of a slurry shield equipped with a high-pressure jet system, which adopts a slurry shield machine equipped with a high-pressure jet system as described in Example 1 or Example 2, including: during construction in soft soil layers, when the cutter head mechanism 4 suddenly encounters hard matter, high-pressure water and abrasive are provided to the nozzle 203 through the second water supply pipe 2014 and the second material supply pipe 2023, and the hard matter is cut by water jet.

[0056] Example 4:

[0057] This embodiment provides a method for operating a slurry shield equipped with a high-pressure jet system, using a slurry shield machine equipped with a high-pressure jet system as described in Example 1 or Example 2. In this embodiment, in addition to the nozzle 203, the slurry shield device is also provided with a nozzle for flushing the mud cake. The nozzle for flushing the mud cake can be implemented using a conventional nozzle, such as one with an inclined nozzle. When flushing the mud cake, the water jet can be sprayed onto the mud cake on the cutter head body 401. In some embodiments, the nozzle for flushing the mud cake can be one or more of a fixed nozzle, a retractable nozzle, a rotating nozzle, a pulse nozzle, and an oscillating nozzle, so as to achieve the purposes of reducing blind spots, increasing the flushing range, and increasing the flushing force.

[0058] Conventional sprinklers can be used for fixed, retractable, rotating, pulsed, and oscillating nozzles. Alternatively, in some other embodiments, the retractable sprinkler can include a cylinder or other retractable device, as well as a sprinkler head attached to the cylinder or other retractable device. The water inlet pipe of the sprinkler head can be located at the end of the retractable rod of the retractable device to avoid being affected by the retracting action. Alternatively, a structure such as a sealed retractable rod can be used in the middle of the retractable device. The rotating sprinkler can be a sprinkler that automatically rotates around its vertical axis based on water pressure. Alternatively, a structure comprising a rotating portion and a nozzle can be used, wherein the rotating portion is powered by a rotating motor, and a conversion head or conversion element is provided to enable water flow transmission during rotation. By providing a rotating sprinkler head, 360-degree water jet spraying can be achieved, increasing the flushing range. The pulsed sprinkler can optionally be provided with a switch on one or more water supply pipes. The switch is a controllable switch that opens and closes according to a preset frequency, achieving pulsed water jet spraying and improving the mud cake flushing effect. The swing-type nozzle can be realized by setting a motor or other power equipment, so that the nozzle can swing according to a certain angle and trajectory during spraying, thereby improving the mud cake washing effect.

[0059] Based on the mud-water shield device in this embodiment, a cutting mode and a mud cake flushing mode are set during operation. Specifically, when the controller 5 determines that the pressure detected by the sensor 6 is greater than a preset value, it is determined that a harder material such as stone is present. At this time, the high-pressure jet mechanism 2 is started to assist in excavation 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 shield machine cutter head increases. After the thrust of the shield machine cutter head 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 and the mud cake flushing mode is entered. The mud cake is flushed through the nozzle for flushing the mud cake. It can be understood that the water pressure when executing the mud cake flushing mode is lower than the water pressure when executing the cutting mode, and no abrasive is provided when executing the mud cake flushing mode.

[0060] In order to reduce the number of nozzles used, in some embodiments, an inclined nozzle 2033 is provided on the side of the nozzle body 2031; in a first working condition, the straight nozzle 2032 and the inclined nozzle 2033 can spray water at the same time to flush the mud cake. At this time, the water jet of the straight nozzle 2032 does not have the effect of flushing the mud cake; in a second working condition, switches are provided at both the straight nozzle 2032 and the inclined nozzle 2033, the switch at the straight nozzle 2032 is closed, and the switch at the inclined nozzle 2033 is opened to flush the mud cake, thereby avoiding the waste of the water jet of the inclined nozzle 2033; in a third working condition, the switch at the straight nozzle 2032 is opened, and the switch at the inclined nozzle 2033 is closed to perform cutting work to assist excavation.

[0061] The above description is merely a preferred embodiment of this embodiment and is not intended to limit this embodiment. Those skilled in the art will readily appreciate that this embodiment may be modified and varied in various ways. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this embodiment shall be within the scope of protection of this embodiment.

Claims

1. A slurry shield machine equipped with a high-pressure jet system, characterized in that: It includes a cutterhead mechanism, and a mud and water supply mechanism and a high-pressure jet mechanism arranged on the cutterhead 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 of the rotation center; 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 static-dynamic conversion end of the pipe; the abrasive supply assembly includes a first supply pipe connected to the fixed end of the rotation center, and a second supply pipe connected to the rotating end; the rotating end is connected to the cutterhead mechanism, and the second water supply pipe and the second supply pipe are commonly connected to a nozzle, and the nozzle is provided on the cutterhead mechanism; the cutterhead mechanism includes a hob, and a nozzle is provided on each side of the annular cutting line of the hob. The fixed end of the swivel center is provided with a pipeline dynamic-static conversion end at one end away from the rotating end, the first water supply pipe is connected to the fixed end of the pipeline dynamic-static conversion end, and the fixed end of the pipeline dynamic-static conversion end is connected to the fixed end of the swivel center, the rotating end of the pipeline dynamic-static conversion end is connected to a water supply transfer pipe, and the second water supply pipe is connected to the pipeline dynamic-static conversion end through the water supply transfer pipe; the water supply transfer pipe is provided with a water supply joint at one end away from the pipeline dynamic-static 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 pipe; 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; the one or more pump groups are all connected to the first water supply pipe; A first muddy water supply connector is provided on the fixed end of the rotating center, and 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; a silo is provided on the outer wall of the fixed end of the rotating center, and an abrasive outlet is provided on the outer wall of the rotating end; the silo is communicated with the abrasive outlet, the first feed pipe is connected to the silo, and the second feed pipe is connected to the abrasive outlet.

2. A slurry shield machine equipped with a high-pressure jet system according to claim 1, characterized in that: 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.

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

4. 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 oscillating nozzle for flushing the mud cake.

5. A method for operating a slurry shield machine 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 4 is adopted, comprising: during construction in soft soil layers, when the cutter head mechanism suddenly encounters hard matter, high-pressure water and abrasive are supplied to the nozzle through a second water supply pipe and a second material supply pipe, and the hard matter is cut by water jet.

6. The method for operating a slurry shield machine equipped with a high-pressure jet system according to claim 5, 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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