A subway tunnel mortar cleaning system and a cleaning method, and a joint ring dismantling method

Abstract

The present application relates to the technical field of subway shield construction, and particularly relates to a subway tunnel mortar cleaning system and a cleaning method, a connection ring dismantling method, a subway tunnel mortar cleaning system, which comprises a detection device, a grouting device and a cleaning device, wherein the detection device is used for detecting a cavity behind a wall of a positive ring segment and a water collection channel; the grouting device is used for grouting and filling the cavity behind the wall of the positive ring segment and the water collection channel; and the cleaning device is used for cleaning the hole portal mortar; the cavity behind the wall of the positive ring segment and the water collection channel are detected by the detection device, then the cavity behind the wall of the positive ring segment and the water collection channel are grouted and filled by the grouting device, so as to block the cavity behind the wall of the positive ring segment and the water collection channel, compact the gap between the positive ring segment and the tunnel, increase the soil strength of the periphery of the tunnel, ensure the stability of the tunnel geology after the connection ring is dismantled, and then the gap between the connection ring and the station structure filled with the hole portal mortar is cleaned by the cleaning device 4.

Description

Technical Field

[0001] This invention relates to the field of subway tunnel construction technology, and in particular to a subway tunnel mortar cleaning system and cleaning method, and a method for removing connecting rings. Background Technology

[0002] The shield tunneling method is a fully mechanized construction method in the cut-and-cover method. It involves advancing the shield machine underground, using the shield shell and segments to support the surrounding rock and prevent tunnel collapse. At the same time, cutting devices are used to excavate the soil in front of the excavation face, and the soil is transported out of the tunnel by excavation machinery. Jacks are used to pressurize and push the tunnel forward from the rear, and precast concrete segments are assembled to form the shield tunnel structure.

[0003] When the tunnel boring machine (TBM) is launched, there is a reaction frame at the rear of the TBM in the launching shaft. A ring-shaped segment is installed between the reaction frame and the TBM jacks to provide the force for the TBM to advance forward. This continues until the tail of the TBM enters the opening on the other side of the shaft wall and advances a certain distance. This allows the friction between the ground and the ring segment to counteract the reaction force generated by the TBM's advancement. At this point, the ring segment between the reaction frame and the tail of the shield has completed its mission, and then the construction of the portal ring beam of the subway shield tunnel begins.

[0004] During the initial shield launching process, because the outer diameter of the tunnel segment is smaller than the outer diameter of the cutterhead and shield shell of the tunnel boring machine, a ring-shaped gap exists between the outer side of the segment and the tunnel after the segment exits the shield tail. If this gap is not filled in a timely and effective manner, it can easily cause significant ground subsidence, and in severe cases, even lead to the collapse of ground buildings. Therefore, mortar is filled between the outer side of the segment and the tunnel. Figures 1-2 As shown, a retaining structure 11 is provided on the outside of the station structure 10. The outside of the retaining structure 11 is soil 200. The tunnel 13 is located within the soil 200. A connecting ring 12 is provided at the entrance of the subway shield tunnel. The connecting ring 12 is connected to the positive ring segment 14 inside the tunnel 13. During tunnel construction, mortar is filled into the gap between the connecting ring 12 and the station structure 10, and the gap between the positive ring segment 14 and the tunnel 13. Specifically, the gap between the connecting ring 12 and the station structure 10 is filled with portal mortar 171, and the gap between the positive ring segment 14 and the tunnel 13 is filled with segment mortar 172. Then, an extension ring 16 is provided on the station 10, and a grout stop plate 15 is provided on the extension ring 16. The grout stop plate 15 abuts against the connecting ring 12, and the portal mortar 171 and segment mortar 172 are sealed by the grout stop plate 15.

[0005] In the construction of the ring beam of the metro shield tunnel portal, the removal of the connection ring 12 is an important process before the construction of the ring beam of the metro shield tunnel portal, and the connection ring 12 needs to be cleaned before being removed, because the portal mortar 171 has a bonding effect on the connection ring 12, and the bonding effect of the portal mortar 171 on the connection ring 12 will cause the crane to be overloaded when hoisting the connection ring 12, which will cause the hoist rope to break, and will endanger the safety of personnel and equipment, and will cause the connection ring 12 to be difficult to remove, so the mortar between the station structure 17 and the connection ring 12 needs to be cleaned before the connection ring 12 is removed,

[0006] When the shield is started and the mortar is injected, the portal mortar 171 located in the upper area of the connection ring 12 and the segment mortar 172 located in the upper area of the positive ring segment 14 are easily lost from the gap between the mortar plate 15 and the connection ring 12, so that the lost segment mortar 172 in the cavity and the water collection channel formed behind the wall of the positive ring segment 14; or when the shield is started and the mortar is injected, the injected segment mortar 172 fails to fill the upper area of the positive ring segment 14, so that the area where the segment mortar 172 is missing above the wall behind the positive ring segment 14 forms a cavity and a water collection channel; if the mortar plate 15 is directly removed to clean the portal mortar 171, a large cavity will be formed between the station structure 10 and the connection ring 12 after the portal mortar 171 is cleaned, the cavity is connected with the cavity and water collection channel behind the wall of the positive ring segment 14, which causes the water collection channel to expand, the water flow in the water collection channel flows out from the cavity between the station structure 10 and the connection ring 12, which easily causes geological collapse and poses a huge safety risk to the metro station, therefore, how to orderly and efficiently clean the portal mortar 171 between the station structure 10 and the connection ring 12 becomes a difficult problem to be solved. SUMMARY

[0007] The purpose of the present application is to solve the problem that the portal mortar needs to be cleaned when the connection ring is removed, and a large cavity is formed between the station structure and the connection ring after the portal mortar is cleaned, the cavity is connected with the cavity and water collection channel behind the wall of the positive ring segment, which causes the water collection channel to expand, the water flow in the water collection channel flows out from the cavity between the station structure and the connection ring, which easily causes geological collapse and poses a huge safety risk to the metro station, and to provide a metro tunnel mortar cleaning system and a cleaning method, and a connection ring removal method, for safely and efficiently cleaning the portal mortar between the station structure and the connection ring, so as to safely and efficiently remove the connection ring and ensure the safety of construction operations.

[0008] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0009] A metro tunnel mortar cleaning system, comprising a detection device, a grouting device and a cleaning device, wherein,

[0010] The detection device is used for detecting the cavity and water collection channel behind the wall of the positive ring pipe;

[0011] The grouting device is used for grouting and filling the cavity and water collection channel behind the wall of the positive ring pipe;

[0012] The cleaning device is used for cleaning the hole portal mortar.

[0013] The subway tunnel mortar cleaning system detects the cavity and water collection channel behind the wall of the positive ring pipe through the detection device, and then grouts and fills the cavity and water collection channel behind the wall of the positive ring pipe through the grouting device, so as to block the cavity and water collection channel behind the wall of the positive ring pipe, compact the gap between the positive ring pipe and the tunnel, increase the strength of the soil around the tunnel, ensure the stability of the tunnel geology after the connection ring is removed, and clean the gap between the connection ring and the station structure filled with the hole portal mortar through the cleaning device, so that the subsequent removal of the connection ring is facilitated. Further, the subway tunnel mortar cleaning system effectively improves the cleaning efficiency of the hole portal mortar, reduces the risk of subsequent removal of the connection ring, realizes the purpose of safely and efficiently cleaning the hole portal mortar between the station structure and the connection ring, and is simple to operate and convenient to work, and can be applied to different subway projects.

[0014] Preferably, the detection device is used for detecting the positive ring pipe along the tunnel axis direction.

[0015] Preferably, the grouting device comprises a communication pipe, the communication pipe is arranged on the positive ring pipe, and the communication pipe is in communication with the cavity behind the wall of the positive ring pipe.

[0016] Preferably, the grouting device further comprises a double-liquid grouting device and a three-prong mixing device, the double-liquid grouting device is in communication with the three-prong mixing device, and the three-prong mixing device is in communication with the communication pipe.

[0017] Preferably, the three-prong mixing device comprises an input pipe and a mixing pipe, the input pipe is in communication with the double-liquid grouting device through a rubber hose, and the mixing pipe is in communication with the communication pipe.

[0018] Preferably, a ball valve is arranged between the mixing pipe and the reserved grouting hole.

[0019] Preferably, the cleaning device comprises a high-pressure cleaning device, the high-pressure cleaning device is connected with a high-pressure gun head, and the high-pressure gun head is used for cleaning the hole portal mortar.

[0020] The application further discloses a subway tunnel mortar cleaning method using the subway tunnel mortar cleaning system.

[0021] Step A: detecting the cavity behind the segment of the positive toroidal pipe and the water collection channel using the detection device;

[0022] Step B: after detecting the cavity behind the segment of the positive toroidal pipe and the water collection channel, filling the cavity behind the segment of the positive toroidal pipe and the water collection channel with grouting using the grouting device;

[0023] Step C: after filling the cavity behind the segment of the positive toroidal pipe and the water collection channel with grouting, cleaning the first hole portal mortar between the extension ring and the connection ring using the cleaning device, and then disassembling the extension ring;

[0024] Step D: after disassembling the extension ring, cleaning the second hole portal mortar between the connection ring and the station structure using the cleaning device, wherein the connection ring is supported by the bracket during the cleaning of the second hole portal mortar.

[0025] The metro tunnel mortar cleaning method provided by the application uses a detection device to detect the cavity behind the segment of the positive toroidal pipe and the water collection channel, and then uses a grouting device to fill the cavity behind the segment of the positive toroidal pipe and the water collection channel with grouting, thereby plugging the cavity behind the segment of the positive toroidal pipe and the water collection channel, compacting the gap between the segment of the positive toroidal pipe and the tunnel, and increasing the strength of the soil around the tunnel, thereby ensuring the stability of the geological conditions after the connection ring is disassembled. Then, the first hole portal mortar between the extension ring and the connection ring is cleaned by the cleaning device, so that the extension ring can be disassembled. Then, the second hole portal mortar between the connection ring and the station structure is cleaned by the cleaning device. The connection ring is supported by the bracket during the cleaning process, thereby stabilizing the connection ring and facilitating the subsequent disassembly of the connection ring. The metro tunnel mortar cleaning method provided by the application can effectively clean the hole portal mortar between the station structure and the connection ring, thereby providing a better working environment for the subsequent disassembly of the connection ring.

[0026] Preferably, in step D: during the cleaning of the second hole portal mortar, a triangular wedge is arranged between the connection ring and the station structure, and a bracket wedge is arranged between the bracket and the connection ring.

[0027] The application further discloses a metro tunnel connection ring disassembly method based on the metro tunnel mortar cleaning method.

[0028] Step S1: during the cleaning of the second hole portal mortar, a triangular wedge is arranged between the connection ring and the station structure, and a bracket wedge is arranged between the bracket and the connection ring.

[0029] Step S2: installing the top support assembly: after cleaning the hole portal mortar, a plurality of top support assemblies are arranged on the abutment ring and the adjacent ring segment, each top support assembly including two top supports, wherein the two top supports are arranged on the abutment ring and the adjacent ring segment, respectively;

[0030] Step S3: installing the pushing device: the pushing device is installed between each top support assembly;

[0031] Step S4: separating the abutment ring: the longitudinal connecting bolts between the abutment ring and the adjacent ring segment are removed, and the abutment ring and the adjacent ring segment are separated by the pushing device;

[0032] Step S5: disassembling the abutment ring: the abutment ring is disassembled in blocks by the hoisting device.

[0033] The metro tunnel abutment ring dismounting method provided by the application first cleans the hole portal mortar by the metro tunnel mortar cleaning method, then separates the abutment ring from the adjacent ring segment by the top support and the jack, and finally dismounts the abutment ring in blocks by the hoisting device, so that the abutment ring is dismounted simply and conveniently, the safety risk is greatly reduced, the construction efficiency is improved, the abutment ring is safely and efficiently dismounted, and a strong guarantee is provided for the smooth construction of the metro.

[0034] Preferably, in the step S5: two lifting devices are arranged on each abutment ring block, and at least one lifting device is connected to the hoisting device through a chain, so that the center of gravity of each abutment ring block can be adjusted by adjusting the length of the chain during hoisting, thereby keeping each abutment ring block stable during hoisting.

[0035] In summary, due to the adoption of the above technical solutions, the application has the following advantages:

[0036] 1. A subway tunnel mortar cleaning system, which detects the cavity behind the wall of the positive ring pipe and the water collection channel through the detection device, then fills the cavity behind the wall of the positive ring pipe and the water collection channel through the grouting device, thereby plugging the cavity behind the wall of the positive ring pipe and the water collection channel, compacting the gap between the positive ring pipe and the tunnel, increasing the strength of the soil around the tunnel, ensuring the stability of the tunnel after the connection ring is removed, and then cleaning the gap between the connection ring and the station structure filled with the portal mortar through the cleaning device, thereby facilitating the subsequent removal of the connection ring, further, the subway tunnel mortar cleaning system effectively improves the cleaning efficiency of the portal mortar, reduces the risk of subsequent removal of the connection ring, realizes the purpose of safely and efficiently cleaning the portal mortar between the station structure and the connection ring, and is simple to operate and convenient to work, and can be applied to different subway projects.

[0037] 2. A subway tunnel mortar cleaning method, which detects the cavity behind the wall of the positive ring pipe and the water collection channel using a detection device, then fills the cavity behind the wall of the positive ring pipe using a grouting device, thereby plugging the cavity behind the wall of the positive ring pipe and the water collection channel, compacting the gap between the positive ring pipe and the tunnel, and also increasing the strength of the soil around the tunnel, ensuring the stability of the geology after the connection ring is removed, then cleaning the first portal mortar between the extension ring and the connection ring using a cleaning device, thereby facilitating the disassembly of the extension ring, then cleaning the second portal mortar between the connection ring and the station structure using the cleaning device, supporting the connection ring using a bracket during the cleaning process, stabilizing the connection ring through the bracket, and facilitating the subsequent removal of the connection ring, the subway tunnel mortar cleaning method can effectively clean the portal mortar between the station structure and the connection ring, and provide a better working environment for the subsequent removal of the connection ring.

[0038] 3. A subway tunnel connection ring removal method, which first cleans the portal mortar using the subway tunnel mortar cleaning method, then separates the connection ring from the positive ring pipe using jacks and supports, and then disassembles the connection ring in blocks using hoisting equipment, thereby making the connection ring removal simple and convenient, greatly reducing the safety risk, improving the construction efficiency, and realizing the purpose of safely and efficiently removing the connection ring, thereby providing a strong guarantee for the smooth construction of the subway. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic view of the arrangement of the connection ring, the station structure and the positive ring pipe.

[0040] Figure 2 is a partial enlarged view of A of Figure 1 .

[0041] Figure 3 is the schematic diagram of the arrangement of the detecting device of the present application.

[0042] Figure 4 is the sectional view of the I-I of Figure 3

[0043] Figure 5 is the schematic diagram of the arrangement of the grouting device of the present application.

[0044] Figure 6 is the sectional view of the II-II of Figure 5

[0045] Figure 7 is the sectional view of the III-III of Figure 5

[0046] Figure 8 is the schematic diagram of the operation of the cleaning device to clean the first hole portal mortar between the extension ring and the adapter ring.

[0047] Figure 9 is the sectional view of the C of Figure 8

[0048] Figure 10 is the schematic diagram of the cleaning device to clean the first hole portal mortar between the adapter ring and the station structure. Figure 9

[0049] Figure 11 is the schematic diagram of the operation of the hoisting equipment to disassemble the extension ring.

[0050] Figure 12 is the schematic diagram of the operation of the cleaning device to clean the second hole portal mortar between the adapter ring and the station structure.

[0051] Figure 13 is the sectional view of the K of Figure 12

[0052] Figure 14 is the schematic diagram of the cooperation of the bracket and the adapter ring.

[0053] Figure 15 is the schematic diagram of the arrangement of the pushing equipment.

[0054] Figure 16 is the sectional view of the F of Figure 15

[0055] Figure 17 is the sectional view of the E of Figure 15

[0056] Figure 18 is the left side view of Figure 15

[0057] Figure 19 is the right side view of Figure 18 ​​​​​​​​​An enlarged view of G in Fig.

[0058] Figure 20 is Figure 18 An enlarged view of H in Fig.

[0059] Figure 21 is a schematic view of the operation of disassembling the connecting ring.

[0060] Figure 22 is Figure 21 An enlarged view of J in Fig.

[0061] Fig. Marked: 1-detection device, 101-radar detection equipment, 2-operation platform, 3-grouting device, 31-trifurcated mixing device, 311-input pipe, 312-mixing pipe, 32-double liquid grouting equipment, 33-rubber hose, 34-ball valve, 35-communication pipe, 4-cleaning device, 41-high pressure cleaning equipment, 42-high pressure gun head, 43-high pressure hose, 5-carriage, 6-triangular wedge, 7-carriage wedge, 8-lifting equipment, 10-station structure, 11-enclosure structure, 12-connecting ring, 121-connecting ring block, 13-tunnel, 14-annular segment, 141-reserved grouting hole, 15-stopping plate, 16-extended ring, 171-hole portal mortar, 1711-first hole portal mortar, 1712-second hole portal mortar, 172-segment mortar, 18-longitudinal connecting bolt, 19-circumferential connecting bolt, 20-jack, 201-lifting hole, 202-tightening bolt, 203-shape steel, 21-jacking equipment, 22-hydraulic pump station, 221-hydraulic hose, 23-lifting device, 24-chain, 25-steel wire rope, 26-square wood, 200-soil body. DETAILED DESCRIPTION

[0062] The application will be described in further detail below with reference to the drawings.

[0063] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0064] Example 1

[0065] As shown in Fig. Figures 1-13 A subway tunnel mortar cleaning system, comprising a detection device 1, a grouting device 3, a cleaning device 4, wherein,

[0066] The detection device 1 is used to detect the cavity and water collection channel behind the annular segment 14 wall;

[0067] The grouting device 3 is used to grout and fill the cavity and water collection channel behind the annular segment 14 wall;

[0068] The cleaning device 4 is used for cleaning the joint mortar 171 between the joint ring 12 and the station structure 10.

[0069] The subway tunnel mortar cleaning system can detect the cavity and the water collecting channel behind the wall of the positive ring segment 14 through the detection device 1, and then fill the cavity and the water collecting channel behind the wall of the positive ring segment 14 through the grouting device 3, so as to block the cavity and the water collecting channel behind the wall of the positive ring segment 14, compact the gap between the positive ring segment 14 and the tunnel 13, increase the strength of the soil around the tunnel 13, ensure the stability of the tunnel 13 after the joint ring 12 is removed, and clean the gap between the joint ring 12 and the station structure 10 through the cleaning device 4, so that the joint ring 12 can be removed conveniently. Further, the subway tunnel mortar cleaning system can improve the cleaning efficiency of the joint mortar 171, reduce the risk of removing the joint ring 12, and be simple to operate and convenient to work, and can be applied to different subway projects.

[0070] A preferred mode is shown in Figure 3 The detection device 1 is used for detecting the positive ring segments 14 along the axis direction of the tunnel 13, and the cavity and the water collecting channel behind the wall of the positive ring segments 14 are detected along the axis direction of the tunnel 13 through the detection device 1, so that the cavity and the water collecting channel behind the wall of each positive ring segment 14 can be detected. Further, as shown in Figure 4 The detection device 1 includes at least three radar detection devices 101, and the radar detection devices 101 are arranged at the top of the same positive ring segment 14 when detecting the same positive ring segment 14, so that the same positive ring segment 14 at a fixed position is detected through the multiple radar detection devices 101 arranged on the same positive ring segment 14, and the detection result is more accurate and reliable.

[0071] A preferred mode is shown in Figures 5-6 The upper part of the positive ring segment 14 is provided with a reserved grouting hole 141, the grouting device 3 includes a communication pipe 35, the communication pipe 35 is arranged on the positive ring segment 14, and the communication pipe 35 communicates with the reserved grouting hole 141, so that the grouting device 3 communicates with the reserved grouting hole 141 arranged on the upper part of the positive ring segment 14, the cavity and the water collecting channel behind the wall of the positive ring segment 14 are grouted through the communication pipe 35, so that the cavity and the water collecting channel behind the wall of the positive ring segment 14 are blocked, the gap between the positive ring segment 14 and the tunnel 13 is compacted, the strength of the soil around the tunnel 13 is increased, and the stability of the tunnel 13 after the joint ring 12 is removed is ensured.

[0072] A preferred mode is shown in Figures 5-6As shown, the grouting device 3 further comprises a three-prong mixing device 31, a double-liquid grouting device 32, and a rubber hose 33, the double-liquid grouting device 32 is connected to the three-prong mixing device 31 through the rubber hose 33, the three-prong mixing device 31 is connected to the communication pipe 35, further, the three-prong mixing device 31 comprises two input pipes 311 and a mixing pipe 312, each input pipe 311 is connected to the double-liquid grouting device 32 through the rubber hose 33, the mixing pipe 312 is connected to the communication pipe 35, wherein the double-liquid grouting device 32 has two groups of slurry outlets, one group is a cement slurry outlet, and the other group is a glass water outlet, the two groups of slurry can be quickly solidified after mixing, each group of slurry outlets of the double-liquid grouting device 32 is connected to the input pipe 311 of the three-prong mixing device 31 through the rubber hose 33, and the two groups of slurry output by the double-liquid grouting device 32 are mixed in the three-prong mixing device 31 and then input into the reserved grouting hole 141 of the positive ring pipe piece 14 through the mixing pipe 312, so as to realize grouting of the cavity behind the wall of the positive ring pipe piece 141 and the water collecting channel and quick solidification of the slurry.

[0073] A preferred mode is as shown in Figure 6 As shown, a ball valve 34 is installed between the mixing pipe 312 and the communication pipe 35, by setting the ball valve 34, when the grouting reaches the design pressure, the ball valve is closed to prevent the slurry from flowing back into the three-prong mixing device 31.

[0074] A preferred mode is as shown in Figure 7 As shown, in order to improve the grouting efficiency of the grouting device 3, a plurality of three-prong mixing devices 31 are arranged at intervals on the top of the same positive ring pipe piece 14.

[0075] A preferred mode is as shown in Figures 8-9 As shown, the cleaning device 4 comprises a high-pressure cleaning device 41, the high-pressure cleaning device 41 is connected to a high-pressure gun head 42 through a high-pressure hose, and the high-pressure gun head 42 is used for cleaning the hole portal mortar 171.

[0076] A preferred mode is as shown in Figures 12-13 As shown, after the extension ring 16 is removed, the second hole portal mortar 1712 between the station structure 10 and the connection ring 12 is cleaned by the high-pressure cleaning device 4, the cleaning of the second hole portal mortar 1712 is carried out in sections, and the cleaning sequence is from bottom to top, after a section is cleaned, a triangular wedge 6 is installed in the cleaned section, and the cleaning is stopped when the second hole portal mortar 1712 reaches the positive ring pipe piece 14, that is, the hole portal mortar 171 cleaning work is completed, wherein, during the cleaning process, a bracket 5 is installed at the part of the connection ring 4 protruding from the station structure 10, the connection ring 12 is stabilized through the bracket 5, the removal of the connection ring 12 is facilitated, and a bracket wedge 7 is installed in the gap between the bracket 5 and the connection ring 12, as shown in Figure 14 .

[0077] A preferred mode is as shown inFigure 4 , Figure 7 As shown, the subway shield tunnel connecting ring mortar cleaning system described in this embodiment also includes a working platform 2. The working platform 2 is used to deploy the radar detection equipment 1 and the three-pronged mixing device 31. That is, during the installation of the radar detection equipment 1 and the three-pronged mixing device 31, the working platform 2 is first erected inside the positive ring segment 14. During construction, the detection personnel install the radar detection equipment 1 and the three-pronged mixing device 31 on the working platform 2. The working platform 2 is assembled from scaffolding. The erection length of the working platform 2 inside the positive ring segment 14 is greater than the combined length of four positive ring segments 14. Furthermore, the scaffolding erected for the working platform 2 abuts against the inner wall of the positive ring segment 14, so that the working platform 2 supports the inner wall of the positive ring segment 14 and protects the positive ring segment 14.

[0078] Example 2

[0079] Based on Example 1, such as Figures 3-14 As shown, this embodiment of a subway tunnel mortar cleaning method uses a subway tunnel mortar cleaning system as described in Embodiment 1. The method includes the following steps:

[0080] Step A: Use detection device 1 to inspect the cavity and water collection channel behind the wall of the positive ring segment 14, such as... Figures 3-4 As shown, a working platform 2 is first erected inside the positive ring segment 14 of tunnel 13 as an operating platform for inspection personnel. The working platform 2 is erected along the axial direction of tunnel 13, and the erection range exceeds the combined length of four positive ring segments 14. The inspection personnel 13 operate the radar detection equipment 101 on the working platform 2 to inspect the cavity behind the wall of the positive ring segment 14. The radar detection equipment 101 sequentially inspects each positive ring segment 14 along the axial direction of tunnel 13. When inspecting the same positive ring segment 14, there are at least three radar detection equipment 101s, which are arranged at intervals on the top of the same positive ring segment 14.

[0081] Step B: After inspecting the cavity and water collection channel behind the wall of the positive ring segment 14, use the grouting device 3 to grout and fill the cavity and water collection channel behind the wall of the positive ring segment 14, such as... Figures 5-7As shown in the figure, after detecting the cavity behind the wall of the positive torus piece 14 and the catchment channel area, the grouting operator installs the three-prong mixing device 31 through the operation platform 2. When installing, the three-prong mixing device 31 is connected with the communication pipe 35, the communication pipe 35 is installed on the pre-buried grouting hole 141 of the positive torus piece 14, and the communication pipe 35 is connected with the pre-buried grouting hole 141. Among them, the two input pipes 311 of the three-prong mixing device 31 are connected with the double-liquid grouting equipment 32 through the rubber hose 33, and the mixing pipe 312 of the three-prong mixing device 31 is connected with the pre-buried grouting hole 141. In order to prevent the backflow of the slurry injected into the pre-buried grouting hole 141 of the three-prong mixing device 31, the ball valve 34 is connected between the mixing pipe 312 and the communication pipe 35. When the grouting reaches the design pressure, the ball valve 34 is closed to prevent the backflow of the slurry into the three-prong mixing device 31.

[0082] Step C: After filling the cavity behind the wall of the positive torus piece 14 and the catchment channel with grouting, use the cleaning device 4 to clean the first hole door mortar 1711 between the extension ring 16 and the connection ring 12. As shown in Figure 2 、 Figures 8-9 , the grouting plate 15 is first disassembled, then the cleaning operator rides the elevator and holds the high-pressure gun head 42, and the first hole door mortar 1711 between the extension ring 16 and the connection ring 12 is cleaned through the high-pressure gun head 42, as shown in Figure 10 , wherein the high-pressure gun head 42 is connected with the high-pressure cleaning equipment 41 through the high-pressure hose 43, the high-pressure cleaning equipment 41 outputs high water pressure to the high-pressure gun head 42, and the first hole door mortar 1711 between the extension ring 16 and the connection ring 12 is cleaned through the high-pressure gun head 42. The transverse cleaning depth reaches the station structure 10 and the operation stops, as shown in Figure 10 .

[0083] After cleaning the first hole door mortar 1711 between the extension ring 16 and the connection ring 12, as shown in Figure 11 , the extension ring 16 is disassembled by the hoisting equipment 8, the extension ring 16 is divided into four parts for disassembly, and the disassembly is performed from top to bottom. When disassembling, the hoisting equipment 8 is used for hoisting, one end of the traction rope 21 is connected to the lower part of the extension ring 16, and one end is controlled by the hoisting operator, so as to reduce the swing of the extension ring 16 during disassembly and hoisting.

[0084] Step D: As shown in Figures 12-13 , after disassembling the extension ring 16, the second hole door mortar 1712 between the connection ring 12 and the station structure 10 is cleaned using the cleaning device 4. During the cleaning of the second hole door mortar 1712, the connection ring 12 is supported by the bracket 5;

[0085] A preferred way, after the extension ring 16 is removed, the second hole mortar 1712 between the joint ring 12 and the station structure 10 is cleaned by the high-pressure gun head 42, the second hole mortar 1712 is cleaned in the form of area, and the cleaning method from bottom to top is adopted, and one or more triangular wedges 6 are installed after the completion of cleaning in an area, and the cleaning of the second hole mortar 1712 stops when the transverse depth reaches the positive ring pipe piece 14, that is, the hole mortar 171 cleaning work is completed, as shown in Figure 13 Further, during the cleaning process, a bracket 5 is installed at the part of the joint ring 12 protruding from the station structure 10, as shown in Figure 12 The bracket 5 supports the joint ring 12 and stabilizes the left and right of the joint ring 12, which provides convenience for the subsequent removal of the joint ring 12, and a plurality of bracket wedges 7 are installed in the gap between the bracket 5 and the joint ring 12, as shown in Figure 14 .

[0086] As shown in Figure 14 , when the triangular wedge 6 is installed between the station structure 10 and the joint ring 12, the triangular wedge 6 is preferably a triangular pyramid, one of the sharp heads of the triangular wedge 6 is in contact with the joint ring 12, the side surface of the triangular wedge 6 opposite to the sharp head is in contact with the station structure 10, and the triangular wedge 6 is used to fix the joint ring 12; when the bracket wedge 7 is installed in the gap between the bracket 5 and the joint ring 12, the bracket wedge 7 is preferably rectangular, the upper surface of the bracket wedge 7 is in contact with the joint ring 12, and the lower surface of the bracket wedge 24 is in contact with the bracket 5, and further, the side surface of the triangular wedge 6 is provided as an arc surface, and the arc surface of the triangular wedge 6 is adapted to the station structure 10.

[0087] Embodiment 3

[0088] Based on the embodiment 2, as shown in Figures 12-20 , the subway tunnel joint ring removal method described in the embodiment is based on the subway tunnel mortar cleaning method described in the embodiment 2 to clean the hole mortar 171, and further comprises the following construction steps:

[0089] Step S1: using the cleaning device 4 in the embodiment 2 to clean the second hole mortar 1712 between the joint ring 12 and the station structure 10, Figures 12-14 After the extension ring 16 is removed, the second hole mortar 1712 between the station structure 10 and the joint ring 12 is cleaned by the high-pressure gun head 42, the second hole mortar 1712 is cleaned in the form of area, and the cleaning method from bottom to top is adopted, and one or more triangular wedges 6 are installed after the completion of cleaning in an area, that is, the triangular wedge 6 is installed between the joint ring 12 and the station structure 10, and the cleaning of the second hole mortar 1712 stops when the transverse depth reaches the positive ring pipe piece 14, as shown in Figure 13 Further, during the cleaning process, a bracket 5 is installed at the part of the joint ring 12 protruding from the station structure 10, as shown in Figure 12 ,Figure 14 The bracket 5 supports the joint ring 12, stabilizes the joint ring 12 left and right, and facilitates the subsequent dismounting of the joint ring 12, wherein a plurality of bracket wedges 7 are installed in the gap between the bracket 5 and the joint ring 12, as shown in Figure 14 ;

[0090] The triangular wedge 6 installed between the joint ring 12 and the station structure 10 fixes the joint ring 12 after the joint ring 12 is separated from the adjacent ring segment 14, limits the downward displacement of the joint ring 12 due to its own weight, and restricts the swing of the joint ring 12 during the subsequent separation of the joint ring 12;

[0091] The bracket wedge 7 is arranged between the bracket 5 and the joint ring 12, and the bracket 5 and the bracket wedge 7 jointly bear the weight of the joint ring 12 during the subsequent separation of the joint ring 12, and further, the triangular wedge 6, the bracket 5 and the bracket wedge 7 jointly ensure the stability of the subsequent dismounting process of the joint ring 12, thereby ensuring the safety of the dismounting process.

[0092] Step S2: Install the jacking assembly: as shown in Figures 15-16 After cleaning the hole portal mortar 171, a plurality of jacking assemblies are arranged on the joint ring 12 and the adjacent ring segment 14, each jacking assembly including two jacks 20, wherein the two jacks 20 are arranged on the joint ring 12 and the adjacent ring segment 14, respectively, i.e. one jack 20 is arranged on the joint ring 12 and the adjacent ring segment 14, respectively, to form a jacking assembly, and the jacks 20 in the same group are located on a straight line, and the straight line is parallel to the axial direction of the tunnel 13;

[0093] As shown in Figure 16 , Figure 18 , Figure 20 The joint ring 12 and the adjacent ring segment 14 are provided with lifting holes 201, and the jack 20 includes a compression bolt 202 and a section steel 203, and the section steel 203 is installed on the lifting hole 201 by the compression bolt 202, thereby realizing the installation of a single jack 20.

[0094] Step S3: Install the jacking equipment 21: as shown in Figure 16As shown, between each set of top support assemblies, a jacking device 21 is installed, the top support 20 is used to bear the jacking force of the jacking device 21, and the jacking force of the jacking device 21 is transmitted to the abutment ring 12 and the adjacent ring segment 14 of the abutment ring 12, the top support 20 and the jacking device 21 are located on the same straight line, one end of the jacking device 21 abuts against the top support 20 installed on the abutment ring 12, and the other end of the jacking device 21 abuts against the top support 20 installed on the adjacent ring segment 14 of the abutment ring 12;

[0095] In the construction operation, the jacking device 21 is preferably a hydraulic jack, one end of the hydraulic jack abuts against the top support 20 installed on the abutment ring 12, and the other end of the hydraulic jack abuts against the top support 20 installed on the adjacent ring segment 14 of the abutment ring 12, the working platform 2 is used as the working platform of the hydraulic jack, the weight of the hydraulic jack is borne by the working platform 2, a square timber 26 is installed between the hydraulic jack and the working platform 2, the position between the hydraulic jack and the working platform 2 and the position between the hydraulic jack and the top support 20 are adjusted by the square timber 26, wherein, before the construction operation, the working platform 2 is adjusted in advance, so that the height position of the working platform 2 is basically consistent with the laying position where the hydraulic jack needs to be installed.

[0096] Step S4: separating the abutment ring 12: as shown in Figures 15-17 , the longitudinal connecting bolts 18 between the abutment ring 12 and the adjacent ring segment 14 of the abutment ring 12 are removed, and the abutment ring 12 and the adjacent ring segment 14 of the abutment ring 12 are separated by the jacking device 21, wherein, as shown in Figure 17 , the abutment ring 12 and the adjacent ring segment 14 of the abutment ring 12 in this application are connected by longitudinal connecting bolts 18;

[0097] In the construction operation, when the jacking device 21 is preferably a hydraulic jack, a hydraulic pump station 22 is used to provide high-pressure hydraulic oil for the hydraulic jack, the high-pressure hydraulic oil generated by the hydraulic pump station 22 is input into the hydraulic jack through a hydraulic hose 221, so that the hydraulic jack generates jacking, that is, the pressure and flow rate input of the hydraulic jack are controlled by the hydraulic pump station 22, one hydraulic pump station 22 controls one hydraulic jack, and each hydraulic pump station 22 is operated by one hydraulic pump station operator, the hydraulic pump station operator adjusts the hydraulic pressure and hydraulic flow rate output by the hydraulic pump station 22 by measuring the separation distance between the adjacent ring segment 14 of the abutment ring 12 and the abutment ring 12, so as to ensure that the separation distance between the adjacent ring segment 14 of the abutment ring 12 and the abutment ring 12 does not exceed the design interval value, and the abutment ring 12 is hoisted to a position where the edge 15-20 cm of the station structure 10 is exposed, and the separation operation is stopped;

[0098] Wherein, in the operation of hydraulic pump station 22, hydraulic oil is input to the hydraulic jack through hydraulic hose 221, the hydraulic jack jacks out, the front end and the rear end of the hydraulic jack act on the two ends of the shore 20 respectively, the adapter ring 21 slides along the tunnel 13 to the side away from the straight ring segment 14, until the adapter ring 12 is separated from the straight ring segment 14 close to the adapter ring 12, and in the process of separation, the surveying personnel hold the surveying tools to measure the distance between the adapter ring 12 and the straight ring segment 14 close to the adapter ring 12 at different positions, and then command the hydraulic pump station 22 to adjust the jacking speed of the hydraulic jack to ensure that the separation distance between the adapter ring 12 and the straight ring segment 14 close to the adapter ring 12 does not exceed the design interval value;

[0099] Wherein, in the process of separating the adapter ring 12 from the straight ring segment 14 close to the adapter ring 12, the bracket 5 supports the adapter ring 12, so the bracket 5 moves with the adapter ring 12, in order to facilitate the movement of the bracket 5, a smooth displacement steel plate is laid on the ground at the bottom of the bracket 5, and butter is smeared on the steel plate to reduce the friction between the bracket 5 and the displacement steel plate, so that the bracket 5 can move on the displacement steel plate, thereby enabling the adapter ring 12 to move normally in the separation process.

[0100] Step S5: disassembling the adapter ring 12: disassembling the adapter ring 12 in blocks by the hoisting equipment 8, wherein the adapter ring 12 in the application is composed of a plurality of adapter ring blocks 121, each adjacent adapter ring block 121 is connected by a ring connecting bolt 19, thereby forming the adapter ring 12, as shown in Figure 19 When each adapter ring block 121 is disassembled, the triangular wedge 6 arranged beside it is removed in advance, and after the last adapter ring block 121 is hoisted and disassembled near the portal, the bracket 5 and the bracket wedge 7 are transported away.

[0101] In the construction operation, the shore 20, the hydraulic jack 21 and the like are removed first, then the lifting device 23 is installed in the lifting hole 201 on the adapter ring block 121, two lifting devices 23 are installed on each adapter ring block 121, if there are not enough lifting holes 201 or it is not convenient for construction, new lifting holes 201 are opened on each adapter ring block 121.

[0102] A preferred mode is as follows: Figures 21-22As shown, when the lifting appliance 23 is connected with the hoisting device 8, the at least one lifting appliance 23 is connected with the hoisting device 8 through the chain fall 24. The chain fall 24 is arranged between the at least one lifting appliance 23 and the hoisting device 8, so that the center of gravity of each ring segment 121 can be adjusted by adjusting the length of the chain fall 24 during the hoisting operation, thereby keeping each ring segment 121 stable during hoisting. If one lifting appliance 23 is connected with the hoisting device 8 through the chain fall 24, the other lifting appliance 23 is connected with the hoisting device 8 through the wire rope 25. Alternatively, both of the lifting appliances 23 are connected with the hoisting device 8 through the chain fall 24.

[0103] Before hoisting, a certain pre-load is applied to the ring segments 121 by the hoisting device 8, which is slightly less than the weight of the ring segments 121. The center of gravity of the ring segments 121 is adjusted in advance through the chain fall 24. After the pre-load is applied by the hoisting device 8, the circumferential connecting bolts 19 between the ring segments 121 to be hoisted and the ring segments 121 not to be hoisted are disassembled. Then, the hoisting device 8 is started to hoist the ring segments 121 to be hoisted. The above process is repeated to sequentially complete the disassembly and hoisting of the ring segments 121. A traction rope is installed on the ring segments 121 to be hoisted, so that the swinging of the ring segments 121 during disassembly and hoisting can be adjusted.

[0104] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for cleaning mortar in subway tunnels, characterized in that, A mortar cleaning system for subway tunnels is used, the mortar cleaning system for subway tunnels includes a detection device (1), a grouting device (3), and a cleaning device (4), wherein, The detection device (1) is used to detect the cavity and water collection channel behind the wall of the positive ring pipe segment (14); The grouting device (3) is used to grout and fill the cavity and water collection channel behind the wall of the positive ring segment (14); The cleaning device (4) is used to clean the mortar (171) at the tunnel entrance; The detection device (1) is used to detect the positive ring segment (14) along the axis of the tunnel (13); The grouting device (3) includes a connecting pipe (35), which is disposed on the positive ring segment (14) and is connected to the cavity behind the wall of the positive ring segment (14); The grouting device (3) further includes a dual-liquid grouting device (32) and a three-pronged mixing device (31), wherein the dual-liquid grouting device (32) is connected to the three-pronged mixing device (31), and the three-pronged mixing device (31) is connected to the connecting pipe (35); The three-pronged mixing device (31) includes an input pipe (311) and a mixing pipe (312). The input pipe (311) is connected to the dual-liquid grouting equipment (32) through a rubber hose (33), and the mixing pipe (312) is connected to the connecting pipe (35). The cleaning device (4) includes a high-pressure cleaning device (41), which is connected to a high-pressure gun head (42) for cleaning the mortar (171) at the tunnel entrance. The method also includes the following steps: Step A: Use the detection device (1) to detect the cavity and water collection channel behind the wall of the positive ring segment (14); Step B: After inspecting the cavity and water collection channel behind the wall of the positive ring segment (14), the grouting device (3) is used to grout and fill the cavity and water collection channel behind the wall of the positive ring segment (14); Step C: After grouting and filling the cavity and water collection channel behind the wall of the positive ring segment (14), use the cleaning device (4) to clean the first hole mortar (1711) between the extension ring (16) and the connecting ring (12), and then disassemble the extension ring (16); Step D: After disassembling the extension ring (16), the cleaning device (4) is used to clean the second portal mortar (1712) between the connecting ring (12) and the station structure (10), wherein the connecting ring (12) is supported by a bracket (5) during the cleaning of the second portal mortar (1712).

2. The method for cleaning mortar in subway tunnels according to claim 1, characterized in that, In step D: During the cleaning of the second portal mortar (1712), a triangular wooden wedge (6) is set between the connecting ring (12) and the station structure (10), and a bracket wooden wedge (7) is set between the bracket (5) and the connecting ring (12).

3. A method for dismantling a connecting ring in a subway tunnel, characterized in that, The method for cleaning mortar in a subway tunnel as described in claim 1, which cleans the mortar (171) at the tunnel portal, further includes the following construction steps: Step S1: During the cleaning of the mortar (1712) of the second tunnel entrance, a triangular wooden wedge (6) is set between the connecting ring (12) and the station structure (10), and a bracket wooden wedge (7) is set between the bracket (5) and the connecting ring (12); Step S2: Install the top support assembly: After cleaning the mortar (171) at the tunnel entrance, multiple sets of the top support assembly are installed on the connecting ring (12) and the positive ring segment (14) close to the connecting ring (12). Each set of top support assembly includes two top supports (20), wherein the two top supports (20) are respectively installed on the connecting ring (12) and the positive ring segment (14) close to the connecting ring (12); Step S3: Install the jacking device (21): Install the jacking device (21) between each set of the jacking components; Step S4: Separate the connecting ring (12): Remove the longitudinal connecting bolts (18) between the connecting ring (12) and the positive ring segment (14) close to the connecting ring (12), and separate the connecting ring (12) and the positive ring segment (14) close to the connecting ring (12) by using the jacking device (21); Step S5: Disassemble the connecting ring (12): Disassemble the connecting ring (12) in sections using the hoisting equipment (8).

4. The method for dismantling a subway tunnel connecting ring according to claim 3, characterized in that, In step S5: two lifting devices (23) are provided on each connecting ring block (121), and at least one of the lifting devices (23) is connected to the lifting equipment (8) by a chain hoist.

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