Back grouting device of tunnel prefabricated lining segment structure

Abstract

The invention discloses a back grouting device of a tunnel prefabricated lining segment structure, which relates to the technical field of grouting equipment and comprises a grouting cylinder, a grouting connector, a support sleeve, a first through groove, a protective sleeve, a support cylinder, a second through groove, a hemispherical base, a hemispherical shell diffusion cover and a grouting head. Slurry is directly sprayed to the inner side of the hemispherical shell diffusion cover after being sprayed out of the grouting head, the hemispherical shell diffusion cover conducts spherical structure guiding diffusion treatment on the slurry, the diffusion range of the slurry in a tunnel lining can be effectively widened, meanwhile, the slurry falls on the surface of the hemispherical base on the outer side of the grouting head for guiding treatment, and the grouting efficiency is improved. The diffusion range of the slurry can be further expanded; the grouting coverage range of the same grouting head is larger, the using number of the grouting heads can be reduced while the back grouting treatment effect of the tunnel lining is guaranteed, the number of holes formed in the surface of the tunnel lining can be effectively reduced, and therefore the grout leakage risk of the tunnel lining during back grouting is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of grouting equipment, and specifically provides a back grouting device for a tunnel precast lining segment structure. Background Art

[0002] Segment lining is a tunnel lining assembled from precast components in a factory or on-site. The adoption of prefabricated lining is one of the development directions of underground engineering; backfill grouting is a method for strengthening building structures, mainly applied to situations where there are cavities or gaps in the structure; after backfill grouting treatment, the tunnel lining structure can be made more firm, improving its bearing capacity and seismic resistance, and having functions such as filling cavities, heat insulation, waterproofing, and moisture-proofing, which can effectively extend the service life; tunnel back grouting technology mainly includes two types: one is the backfill grouting behind the primary support, and the other is the backfill grouting behind the secondary lining.

[0003] Patent (CN118187933A) discloses a back grouting device for a tunnel secondary lining structure, including a grouting valve, a connection joint, and a connection assembly; the flow-discharge hole grouting valve includes an integrally provided umbrella-shaped part and a pipe body part, and the umbrella-shaped part of the flow-discharge hole is coaxially arranged with the pipe body part of the flow-discharge hole; the umbrella-shaped part of the flow-discharge hole is fixedly connected to the primary lining through a connection assembly of the flow-discharge hole, and a plurality of through-flow holes are provided on the umbrella-shaped part of the flow-discharge hole. One end of the through-flow hole of the flow-discharge hole is communicated with the inner cavity of the pipe body part of the flow-discharge hole, and the other end is communicated with the settlement hole of the secondary lining; one end of the pipe body part of the flow-discharge hole is detachably and fixedly connected to the connection joint of the flow-discharge hole, and one end of the connection joint of the flow-discharge hole is connected to the output pipe of the grouting machine; it also relates to a method for back grouting the tunnel secondary lining structure, including grouting valve installation, connection joint installation, secondary lining pouring, grouting of the settlement holes of the secondary lining, installation of the sealing plug, and removal of the connection joint; it is convenient to fill the cavities in the secondary lining pouring and the settlement holes of the secondary lining with cement mortar, improving the construction quality of the tunnel secondary lining.

[0004] For the back grouting device of the tunnel secondary lining structure in the above patent, the coverage range of each grouting head in the grouting device is relatively large, resulting in the need for more grouting heads when back grouting the tunnel lining, and more holes need to be opened on the surface of the tunnel lining structure. Thus, the risk of slurry leakage during grouting of the tunnel lining is relatively high. Summary of the Invention

[0005] The purpose of the present invention is to provide a back grouting device for a tunnel precast lining segment structure to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solution: A back grouting device for a tunnel precast lining segment structure, including a grouting cylinder and a grouting connector. The grouting connector is fixedly connected to the precast lining segment. The grouting connector includes a support sleeve, and a plurality of first through grooves are provided on the outer wall of the support sleeve. A protective sleeve is slidably connected inside the support sleeve. The grouting cylinder includes a support cylinder, and the support cylinder is sleeved inside the support sleeve. A plurality of second through grooves are provided on the outer wall of the support cylinder. A hemispherical base is provided at one end of the inner wall of the support cylinder away from the protective sleeve, and a hemispherical shell diffusion cover is movably connected at the other end of the inner wall of the support cylinder. A grouting head is obliquely provided on the outer wall of the hemispherical base.

[0007] Further, a bidirectional lead screw is provided at the center of the outer wall of the hemispherical shell diffusion cover on the side away from the hemispherical base. A lead screw nut is movably and matingly sleeved on the outer wall of the bidirectional lead screw, and the lead screw nut is fixedly connected to the inner wall of the support cylinder.

[0008] Further, the grouting cylinder further includes a support ring. The support ring is rotatably sleeved outside the lead screw nut. Symmetrically arranged support shafts are rotatably connected to both sides of the top of the hemispherical shell diffusion cover. A first connecting rod is provided on the outer wall of the support shaft outside the hemispherical shell diffusion cover. A second connecting rod is rotatably connected to the end of the first connecting rod away from the support shaft. The end of the second connecting rod away from the first connecting rod is rotatably connected to the outer wall of the support ring. A guiding frame is provided on the outer wall of the support shaft inside the hemispherical shell diffusion cover.

[0009] Further, the support shaft is perpendicular to the bidirectional lead screw, the first connecting rod is perpendicular to the support shaft, the second connecting rod is perpendicular to the support shaft, and the second connecting rod is perpendicular to the bidirectional lead screw.

[0010] Further, the guiding frame includes a first support rod, and a plurality of spiral frames are symmetrically provided on both sides of the outer wall of the first support rod.

[0011] Further, the first support rod is perpendicular to the support shaft, and the spiral frame is perpendicular to the first support rod.

[0012] Further, the lead screw nut is fixedly connected to the inner wall of the support cylinder through a plurality of fixing rods, and the fixing rods are arranged inside the support ring.

[0013] Further, an external thread is provided at one end of the outer wall of the support cylinder away from the hemispherical shell diffusion cover, and an internal thread matching the external thread is provided at one end of the inner wall of the support sleeve away from the protective sleeve.

[0014] Further, the protective sleeve includes support plates symmetrically provided at both ends. A second support rod is provided between the two support plates. A plurality of baffles are provided on the outer walls of the two support plates outside the second support rod, and the baffles are aligned with the first through grooves.

[0015] Furthermore, the outer wall of the support plate fits with the inner wall of the support sleeve. A number of limiting blocks are provided at the top of the inner wall of the support sleeve, and the limiting blocks are arranged between two adjacent baffles.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0017] 1. By providing a grouting cylinder, a grouting connector, a support sleeve, a first through groove, a protective sleeve, a support cylinder, a second through groove, a hemispherical base, a hemispherical shell diffuser, and a grouting head, the hemispherical base supports the spherical structure at the end of the grouting head, and the hemispherical shell diffuser performs shielding and guiding diffusion treatment outside the grouting head. The external grouting equipment conveys the grout to the grouting head through a grouting delivery pipe, and the grout is ejected through the grouting head. After the grout is ejected from the grouting head, it directly sprays onto the inner side of the hemispherical shell diffuser. The hemispherical shell diffuser conducts spherical structure guiding and diffusion treatment on the grout. After the spherical guiding and diffusion treatment, the grout passes through the grouting channel to perform back grouting treatment on the tunnel lining, which can effectively increase the diffusion range of the grout in the tunnel lining. At the same time, the grout falls onto the surface of the hemispherical base outside the grouting head, and the hemispherical base conducts spherical guiding treatment on the grout again, which can further increase the diffusion range of the grout. The coverage range of grouting with the same grouting head is larger. During actual use, while ensuring the back grouting treatment effect on the tunnel lining, the number of grouting heads used can be reduced, the number of holes opened on the tunnel lining surface can be effectively reduced, and thus the risk of grout leakage during back grouting of the tunnel lining can be effectively reduced; it can effectively prevent the backflow of grout in the grouting channel, the grouting channel can be quickly closed after grouting is completed, and the channel grouting is dense, which can effectively prevent the grout from leaking outwards from the inside of the grouting connector.

[0018] 2. By providing a bidirectional lead screw, a lead screw nut, a support ring, a support shaft, and a guiding frame, when the grout is sprayed onto the inner side of the hemispherical shell diffuser, the hemispherical shell diffuser can perform rotational movement and translational movement simultaneously. When the hemispherical shell diffuser performs rotational movement, it can conduct rotational diffusion on the grout. When the hemispherical shell diffuser performs translational movement, it can reciprocally adjust the rotational diffusion amplitude of the grout to achieve pulsed diffusion of the grout, so that the grout undergoes rotational centrifugal diffusion and pulsed diffusion after being diffused by the hemispherical shell diffuser, which can effectively increase the diffusion range of the grout and effectively improve the diffusion uniformity of the grout treatment; the guiding frame performs swing adjustment while performing rotational movement and translational movement inside the hemispherical shell diffuser. When the grout impacts the inner side of the hemispherical shell diffuser, the grout first impacts the guiding frame, and the guiding frame drives the hemispherical shell diffuser to perform rotational movement. At the same time, the guiding frame conducts guiding and diffusion treatment on the grout, which can effectively improve the diffusion treatment uniformity of the grout. Description of the Drawings

[0019] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0020] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0021] Figure 2 is a schematic structural diagram of the grouting cylinder of the present invention;

[0022] Figure 3 is a schematic structural diagram of the grouting connector of the present invention;

[0023] Figure 4 is a schematic structural diagram of the hemispherical base and the hemispherical shell diffuser of the present invention;

[0024] Figure 5 is a schematic structural diagram of the hemispherical shell diffuser of the present invention;

[0025] Figure 6 is a schematic structural diagram of the rotating shaft and the guiding frame of the present invention;

[0026] Figure 7 is a schematic structural diagram of the rotating shaft and the guiding frame at another position of the present invention;

[0027] Figure 8 is a schematic structural diagram of the protective sleeve of the present invention;

[0028] In the figure: 1. Grouting cylinder; 101. Support cylinder; 102. Second through groove; 103. Hemispherical base; 104. Hemispherical shell diffuser; 105. Grouting head; 106. Bidirectional lead screw; 107. Lead screw nut; 108. Support ring; 109. Support shaft; 110. First connecting rod; 111. Second connecting rod; 112. Guiding frame; 113. First support rod; 114. Spiral frame; 115. Fixed rod; 116. External thread; 2. Grouting connector; 201. Support sleeve; 202. First through groove; 203. Protective sleeve; 204. Support plate; 205. Second support rod; 206. Baffle; 207. Internal thread. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-4 and Figure 8, the present invention provides a technical solution: a back grouting device for a tunnel precast lining segment structure, including a grouting cylinder 1 and a grouting connector 2. The grouting connector 2 is fixedly connected to the precast lining segment. The grouting connector 2 includes a support sleeve 201. A plurality of first through grooves 202 are formed in the outer wall of the support sleeve 201. A protective sleeve 203 is slidably connected to the inner side of the support sleeve 201. The grouting cylinder 1 includes a support cylinder 101. The support cylinder 101 is sleeved on the inner side of the support sleeve 201. A plurality of second through grooves 102 are formed in the outer wall of the support cylinder 101. A hemispherical base 103 is provided at one end of the inner wall of the support cylinder 101 away from the protective sleeve 203. A hemispherical shell diffuser 104 is movably connected to the other end of the inner wall of the support cylinder 101. A grouting head 105 is obliquely provided on the outer wall of the hemispherical base 103. The protective sleeve 203 includes support plates 204 symmetrically provided at both ends. A second support rod 205 is provided between the two support plates 204. A plurality of baffles 206 are provided on the outer walls of the two support plates 204 outside the second support rod 205. The baffles 206 are aligned with the first through grooves 202.

[0031] In one embodiment, an external thread 116 is provided at one end of the outer wall of the support cylinder 101 away from the hemispherical shell diffuser 104, and an internal thread 207 matching the external thread 116 is provided at one end of the inner wall of the support sleeve 201 away from the protective sleeve 203. By providing the external thread 116 at the end of the support cylinder 101 and the internal thread at the end of the support sleeve 201, when assembling the support cylinder 101 and the support sleeve 201, the support cylinder 101 is inserted into the inner side of the support sleeve 201, and then the support cylinder 101 and the support sleeve 201 are screwed tightly, which can effectively realize the rapid connection of the support cylinder 101 and the support sleeve 201, and at the same time ensure the safety and stability of the support cylinder 101 and the support sleeve 201 during the grouting operation, and can effectively prevent the support cylinder 101 from falling off from the inner side of the support sleeve 201 during grouting.

[0032] In one embodiment, the outer wall of the support plate 204 is attached to the inner wall of the support sleeve 201, which ensures the degree of fit of the support plate 204 to the inner wall of the support sleeve 201. At the same time, it ensures that the support plate 204 can completely seal the end of the support sleeve 201 under the action of the grouting pressure, which can effectively prevent the backflow of the grouting channel. After grouting, the grouting channel can be quickly closed, and the grouting channel is densely grouted, making the sealing performance of the grouting channel better after grouting. A plurality of limit blocks are provided at the top of the inner wall of the support sleeve 201. The limit blocks are arranged between adjacent two baffles 206. The limit blocks limit the support plate 204 on the inner wall of the support sleeve 201, which can effectively prevent the protective sleeve 203 from being completely separated from the support sleeve 201. At the same time, it can guide the baffle 206, so that the baffle 206 moves translationally along with the support plate 204 without rotational movement, so that the baffle 206 can completely block and seal the first through groove 202.

[0033] Working principle of the present invention:

[0034] Refer to the attached Figures 1-4 and Figure 8 In the present invention, by providing a grouting cylinder 1, a grouting connector 2, a support sleeve 201, a first through groove 202, a protective sleeve 203, a support cylinder 101, a second through groove 102, a hemispherical base 103, a hemispherical shell diffusion cover 104 and a grouting head 105, the grouting connector 2 is used for fixedly connecting with the segment of the tunnel lining. The fixed connection can be achieved by pre-embedding the grouting connector 2 during the prefabrication of the segment, or by making an opening in the segment and then inserting the grouting connector 2 into the inner side of the opening for fixation. The grouting connector 2 is used to provide an installation and connection position for the grouting cylinder 1 on the tunnel lining segment structure, and at the same time, the grouting connector 2 provides a grouting channel behind the tunnel lining segment structure. The grouting cylinder 1 is used for connecting and fixing with the grouting connector 2. The grouting cylinder 1 is inserted into the inner side of the grouting connector 2. At the same time, the grouting head 105 of the grouting cylinder 1 is connected with the grouting delivery pipe in the external equipment. The grouting cylinder 1 performs grouting treatment on the back of the tunnel lining structure through the grouting head 105.

[0035] When the grouting cylinder 1 is inserted into the inner side of the grouting connector 2, the support cylinder 101 is inserted into the inner side of the support sleeve 201. When the support cylinder 101 is inserted into the inner side of the support sleeve 201, as the insertion depth of the support cylinder 101 changes, the support cylinder 101 gradually pushes the protective sleeve 203 inside the support sleeve 201 outwards, so that the first through groove 202 is in an open state. The second through groove 102 on the outer wall of the support cylinder 101 is aligned with the first through groove 202 on the outer wall of the support sleeve 201, and the second through groove 102 and the first through groove 202 are in a through state, forming a grouting channel. The hemispherical base 103 provides spherical support at the end of the grouting head 105, and the hemispherical shell diffusion cover 104 performs shielding, guiding and diffusing treatment outside the grouting head 105. The external grouting equipment transports the slurry to the grouting head 105 through the grouting delivery pipe. The slurry is ejected through the grouting head 105. After the slurry is ejected from the grouting head 105, it directly sprays onto the inner side of the hemispherical shell diffusion cover 104. The hemispherical shell diffusion cover 104 performs spherical guiding and diffusing treatment on the slurry. After the spherical guiding and diffusing treatment, the slurry passes through the grouting channel to perform back grouting treatment on the tunnel lining, which can effectively increase the diffusion range of the slurry in the tunnel lining. At the same time, the slurry falls onto the surface of the hemispherical base 103 outside the grouting head 105, and the hemispherical base 103 performs spherical guiding treatment on the slurry again, which can further increase the diffusion range of the slurry. The coverage range of grouting with the same grouting head 105 is larger. During the actual use process, while ensuring the back grouting treatment effect on the tunnel lining, the number of grouting heads 105 used can be reduced, the number of openings on the tunnel lining surface can be effectively reduced, and thus the risk of slurry leakage during back grouting of the tunnel lining can be effectively reduced.

[0036] The two support plates 204 in the protective sleeve 203 respectively perform closed blocking treatment on the two ends of the inner wall of the support sleeve 201, the second support rod 205 performs overhead support between the two support plates 204, and the baffle 206 performs overhead support on the two support plates 204 outside the second support rod 205. The baffle 206 is used to open and block the first through groove 202. When the support tube 101 pushes the protective sleeve 203 outward, the baffle 206 moves outward with the support plate 204, and the baffle 206 and the first through groove 202 are staggered, so that the first through groove 202 is in an open state, and the second through groove 102 on the outer wall of the support tube 101 is aligned with the first through groove 202 on the outer wall of the support sleeve 201. The second through groove 102 and the first through groove 202 are in a through state, forming a grouting channel, and the slurry is grouted from the grouting channel to the tunnel lining structure from the back; after the grouting is completed, the support tube 101 is Pulling outward, the support tube 101 slides outward along the inner wall of the support sleeve 201. At this time, the inner side of the protective sleeve 203 is filled with slurry, the supporting force of the support tube 101 on the protective sleeve 203 is reduced, and the protective sleeve 203 slides toward the inner side of the support sleeve 201 under the action of the slurry pressure. When the protective sleeve 203 moves along the inner side of the support sleeve 201, the baffle 206 moves along the first through groove 202 to gradually block and close the first through groove 202; when the baffle 206 completely closes the first through groove 202, the slurry will not be transported along the first through groove 202 to the inside of the support sleeve 201, and the protective sleeve 203 completely closes the inner wall of the support sleeve 201 and the first through groove 202. At this time, the inside of the protective sleeve 203 is filled with slurry, which can effectively prevent the grouting channel from returning to the grouting channel. After the grouting is completed, the grouting channel can be quickly closed, and the channel is densely grouted, which can effectively prevent the slurry from leaking from the inside of the grouting connector 2 to the outside.

[0037] See also Figures 1-8 The present invention provides a technical solution: a back grouting device for a tunnel prefabricated lining segment structure, wherein a bidirectional screw 106 is provided at the center of the outer wall of the hemispherical shell diffuser 104 away from the hemispherical base 103, and a screw nut 107 is movably matched with the outer wall of the bidirectional screw 106, and the screw nut 107 is fixedly connected to the inner wall of the support tube 101; the grouting tube 1 also includes a support ring 108, and the support ring 108 is rotatably sleeved on the outside of the screw nut 107, and the top of the hemispherical shell diffuser 104 is symmetrically provided with a rotatably connected support shaft 1 09, a first connecting rod 110 is provided on the outer wall of the support shaft 109 on the outer side of the hemispherical shell diffuser cover 104, the first connecting rod 110 is rotatably connected to a second connecting rod 111 away from one end of the support shaft 109, the second connecting rod 111 is rotatably connected to the outer wall of the support ring 108 away from one end of the first connecting rod 110, and a guide frame 112 is provided on the outer wall of the support shaft 109 on the inner side of the hemispherical shell diffuser cover 104; the guide frame 112 includes a first support rod 113, and a plurality of spiral frames 114 are symmetrically provided on both sides of the outer wall of the first support rod 113.

[0038] In one embodiment, the support shaft 109 is perpendicular to the bidirectional lead screw 106, ensuring that the swinging motion of the support shaft 109 does not require a large through hole to be arranged on the hemispherical shell diffuser 104. By setting the outer diameter of the support shaft 109 to be greater than the thickness of the hemispherical shell diffuser 104, it can be ensured that one end of the outer wall of the support shaft 109 can be located outside the hemispherical shell diffuser 104, and at the same time, it can be ensured that the other side of the outer wall of the support shaft 109 can be located inside the hemispherical shell diffuser 104, thus ensuring the normal swinging of the support shaft 109. The first connecting rod 110 is perpendicular to the support shaft 109, the second connecting rod 111 is perpendicular to the support shaft 109, and the second connecting rod 111 is perpendicular to the bidirectional lead screw 106, defining the positional relationship of the first connecting rod 110, the support shaft 109, the second connecting rod 111, and the bidirectional lead screw 106, and ensuring the normal operation of the above components.

[0039] In one embodiment, the first support rod 113 is perpendicular to the support shaft 109, so that the movement coverage range of the first support rod 113 during the swinging adjustment of the support shaft 109 is larger, and the guiding and diffusing effect on the slurry is better; the spiral frame 114 is perpendicular to the first support rod 113, so that the movement coverage range of the spiral frame 114 during the swinging adjustment of the first support rod 113 is larger, and the guiding and diffusing effect on the slurry is better.

[0040] In one embodiment, the lead screw nut 107 is fixedly connected to the inner wall of the support cylinder 101 through a plurality of fixing rods 115. The fixing rods 115 are arranged inside the support ring 108, and the fixing rods 115 fix the lead screw nut 107, ensuring the safety and stability of the lead screw nut 107, and further ensuring the stability of the translational motion and rotational motion of the bidirectional lead screw 106.

[0041] The working principle of the present invention:

[0042] Refer to the attached drawings of the specification Figures 1-8, in the present invention, by providing a bidirectional lead screw 106, a lead screw nut 107, a support ring 108, a support shaft 109 and a guide frame 112, the bidirectional lead screw 106 is supported at the center of the top of the hemispherical shell diffuser 104. The lead screw nut 107 is connected to the bidirectional lead screw 106 in a matching manner. Since the lead screw nut 107 is fixedly connected to the inner wall of the support cylinder 101, the lead screw nut 107 neither rotates nor translates. Thus, after being processed by the lead screw nut 107, the bidirectional lead screw 106 can rotate while translating; the support ring 108 is rotatably sleeved outside the lead screw nut 107. Here, only the angle and translational position of the support ring 108 are limited to prevent the support ring 108 from shifting and translating. The support ring 108 can rotate with the hemispherical shell diffuser 104, but the support ring 108 does not translate, thereby ensuring the swing adjustment of the support shaft 109; the first connecting rod 110 is supported at the top of the support shaft 109, and the second connecting rod 111 is rotatably supported between the first connecting rod 110 and the support ring 108 to ensure the swing adjustment of the support shaft 109;

[0043] The grouting head 105 is inclined to facilitate the spraying of the slurry ejected from the grouting head 105 onto one side of the inner wall of the hemispherical shell diffuser 104, so that the hemispherical shell diffuser is subjected to inclined force on one side, and the hemispherical shell diffuser 104 rotates under the force. During the rotation of the hemispherical shell diffuser 104 under the force, the bidirectional lead screw 106, the support shaft 109, the first connecting rod 110, the second connecting rod 111 and the guide frame 112 rotate with the hemispherical shell diffuser 104 at the same time; when the bidirectional lead screw 106 rotates along the lead screw nut 107, the bidirectional lead screw 106 can translate during the rotation, and the bidirectional lead screw 106 drives the hemispherical shell diffuser 104 to translate. The support shaft 109, the first connecting rod 110 and the guide frame 112 translate with the hemispherical shell diffuser 104. During the translation of the support shaft 109 and the first connecting rod 110, the distance between the support shaft 109 and the support ring 108 changes, causing the inclination angle of the second connecting rod 111 to change adaptively. The second connecting rod 111 drives the support shaft 109 to swing through the first connecting rod 110, and the guide frame 112 swings and adjusts inside the hemispherical shell diffuser 104 along with the support shaft 109;

[0044] In summary, when the slurry is sprayed onto the inner side of the hemispherical shell diffuser 104, the hemispherical shell diffuser 104 can perform a translational movement while rotating. When the hemispherical shell diffuser 104 rotates, it can diffusely rotate the slurry. When the hemispherical shell diffuser 104 translates, it can reciprocally adjust the rotational diffusion amplitude of the slurry to achieve pulsed diffusion of the slurry, so that the slurry undergoes rotational centrifugal diffusion and pulsed diffusion after being diffusely processed by the hemispherical shell diffuser 104, which can effectively increase the diffusion range of the slurry and effectively improve the diffusion uniformity of the slurry treatment. While the guiding frame 112 performs rotational and translational movements inside the hemispherical shell diffuser 104, it also performs swing adjustment. When the slurry impacts the inner side of the hemispherical shell diffuser 104, the slurry first hits the guiding frame 112. The guiding frame 112 drives the hemispherical shell diffuser 104 to rotate, and at the same time, the guiding frame 112 diffusely guides the slurry, which can effectively improve the diffusion treatment uniformity of the slurry.

[0045] The guiding frame 112 is provided to include a first support rod 113 and a spiral frame 114. The first support rod 113 is used to connect and support the support shaft 109, enabling the spiral frame 114 to swing along with the support shaft 109. When the slurry impacts the spiral frame 114 of the guiding frame 112, the spiral frame 114 diffusely guides the slurry in a spiral manner, which can effectively improve the diffusion treatment uniformity of the slurry. At the same time, when the slurry impacts the spiral blades of the spiral frame 114, it can effectively increase the rotational driving force of the hemispherical shell diffuser 104 after the slurry hits the spiral frame 114, making the hemispherical shell diffuser 104 easier to rotate, which can effectively ensure the simultaneous occurrence of working rotational centrifugal diffusion, pulsed diffusion, and spiral guiding diffusion of the slurry during backfilling grouting, thereby increasing the grouting coverage range during backfilling grouting.

[0046] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A back grouting device for a tunnel prefabricated lining segment structure, comprising a grouting cylinder (1) and a grouting connector (2), characterized in that: The grouting connector (2) is fixedly connected to the prefabricated lining segment, the grouting connector (2) comprises a support sleeve (201), the outer wall of the support sleeve (201) is provided with a plurality of first through grooves (202), the inner side of the support sleeve (201) is slidably connected with a protective sleeve (203), the grouting tube (1) comprises a support tube (101), the support tube (101) is sleeved on the inner side of the support sleeve (201), the outer wall of the support tube (101) is provided with a plurality of second through grooves (102), a hemispherical base (103) is provided at one end of the inner wall of the support tube (101) away from the protective sleeve (203), a movably connected hemispherical shell diffuser (104) is provided at the other end of the inner wall of the support tube (101), and a grouting head (105) is obliquely provided on the outer wall of the hemispherical base (103).

2. The back grouting device for a tunnel prefabricated lining segment structure according to claim 1, characterized in that: A bidirectional screw rod (106) is provided at the center of the outer wall of the hemispherical shell diffuser cover (104) away from the hemispherical base (103), and a screw rod nut (107) is movably matched with the outer wall of the bidirectional screw rod (106), and the screw rod nut (107) is fixedly connected to the inner wall of the support tube (101).

3. The back grouting device of a tunnel prefabricated lining segment structure according to claim 2, characterized in that: The grouting cylinder (1) further comprises a support ring (108), wherein the support ring (108) is rotatably sleeved on the outside of the screw nut (107), and support shafts (109) rotatably connected are symmetrically arranged on both sides of the top of the hemispherical shell diffuser (104), and the outer wall of the support shaft (109) is provided with a first connecting rod (110) on the outside of the hemispherical shell diffuser (104), and the first connecting rod (110) is rotatably connected to a second connecting rod (111) at one end away from the support shaft (109), and the second connecting rod (111) is rotatably connected to the outer wall of the support ring (108) at one end away from the first connecting rod (110), and the outer wall of the support shaft (109) is provided with a guide frame (112) on the inner side of the hemispherical shell diffuser (104).

4. The back grouting device for a tunnel prefabricated lining segment structure according to claim 3, characterized in that: The support shaft (109) and the bidirectional screw rod (106) are perpendicular to each other, the first connecting rod (110) and the support shaft (109) are perpendicular to each other, the second connecting rod (111) and the support shaft (109) are perpendicular to each other, and the second connecting rod (111) and the bidirectional screw rod (106) are perpendicular to each other.

5. The back grouting device for a tunnel prefabricated lining segment structure according to claim 3, characterized in that: The guide frame (112) comprises a first support rod (113), and a plurality of spiral frames (114) are symmetrically arranged on both sides of the outer wall of the first support rod (113).

6. The back grouting device for a tunnel prefabricated lining segment structure according to claim 5, characterized in that: The first support rod (113) and the support shaft (109) are perpendicular to each other, and the spiral frame (114) and the first support rod (113) are perpendicular to each other.

7. The back grouting device of a tunnel prefabricated lining segment structure according to claim 2, characterized in that: The screw nut (107) is fixedly connected to the inner wall of the support tube (101) via a plurality of fixing rods (115), and the fixing rods (115) are arranged on the inner side of the support ring (108).

8. The back grouting device for a tunnel prefabricated lining segment structure according to claim 1, characterized in that: An outer wall of the support tube (101) is provided with an external thread (116) at one end away from the hemispherical shell diffuser cover (104), and an inner wall of the support sleeve (201) is provided with an internal thread (207) matching the external thread (116) at one end away from the protective sleeve (203).

9. The back grouting device for a tunnel prefabricated lining segment structure according to claim 1, characterized in that: The protective sleeve (203) comprises support plates (204) symmetrically arranged at both ends, a second support rod (205) being arranged between the two support plates (204), and a plurality of baffles (206) being arranged on the outer walls of the two support plates (204) outside the second support rod (205), and the baffles (206) are aligned with the first through slot (202).

10. The back grouting device of a tunnel prefabricated lining segment structure according to claim 9, characterized in that: The outer wall of the support plate (204) is fitted with the inner wall of the support sleeve (201), and a plurality of limit blocks are provided on the top of the inner wall of the support sleeve (201), wherein the limit blocks are provided between two adjacent baffles (206).

Images