Tunnel secondary lining vault backfill grouting structure with mold

Abstract

The utility model relates to a tunnel second lining vault backfill grouting structure with a mold, which comprises a grouting pipe, a first connecting assembly and a second connecting assembly, the grouting pipe is longitudinally arranged in a tunnel and is arranged on a vault, the grouting pipe is provided with a plurality of grout overflow holes, the first connecting assembly is connected with the grouting pipe and a first lining so as to limit the position of the grouting pipe, and the second connecting assembly is connected with the second lining so as to limit the position of the grouting pipe. The second connecting assembly is arranged at one end of the grouting pipe and used for communicating the grouting pipe with the conveying pipe. The method has the effect that the problem of tunnel secondary lining disengagement is solved.

Description

Technical Field

[0001] The present application relates to the field of secondary lining vault grouting equipment, and in particular to a tunnel secondary lining vault backfilling grouting structure with a mold. Background Art

[0002] The first lining, also known as the initial support or temporary support, refers to the support work carried out immediately after the tunnel is excavated. Its main purpose is to provide stable support for the surrounding rock as soon as possible during the tunnel excavation process to prevent the instability and collapse of the surrounding rock. The first lining is usually composed of steel supports, anchors, shotcrete, etc. These materials can be quickly installed and put into effect to ensure construction safety and the stability of the surrounding rock; the second lining, also known as the secondary lining or permanent lining, is a structural construction carried out after the first lining. Its main function is to form the final structure of the tunnel, provide long-term stability and durability, and is also the final form of the internal space of the tunnel. The second lining is usually poured into the formwork according to the design requirements to form the inner wall of the tunnel. In the process of pouring concrete, the position of the second lining vault will not be poured in place due to problems such as pumping pressure or pouring method, leaving a cavity, which is usually called de-voiding.

[0003] During the tunnel construction process, the secondary lining is very prone to voiding. When there are problems such as voiding in the tunnel vault, it is bound to endanger the safety performance of the tunnel, mainly because it changes the structural stress of the entire tunnel support system, especially the stress state between the surrounding rock, the primary lining and the secondary lining. When there is a voiding problem in the lining, the mutual state between the primary lining and the surrounding rock is destroyed, which changes the stress structure of the tunnel, and thus brings hidden dangers to the safety performance of the tunnel; at the same time, voiding also means that the lining thickness is insufficient, the structural bearing capacity will be reduced to a certain extent, and there are major quality risks. Utility Model Content

[0004] In order to improve the problem of hollowing out of the secondary lining of a tunnel, the present application provides a tunnel secondary lining arch backfill grouting structure with a mold.

[0005] The present application provides a tunnel secondary lining vault backfilling grouting structure adopts the following technical solution:

[0006] A tunnel secondary lining vault backfilling grouting structure with mold, comprising

[0007] A grouting pipe is longitudinally arranged in the tunnel and arranged on the vault, and the grouting pipe is provided with a plurality of overflow holes;

[0008] A first connection assembly, connected to the grouting pipe, and used to connect to a lining to limit the position of the grouting pipe;

[0009] The second connecting assembly is arranged at one end of the grouting pipe and is used to connect the grouting pipe with the conveying pipe.

[0010] By adopting the above technical solution, the first connecting component can fix the grouting pipe at the arch of the tunnel, so that the grouting pipe is fixed in the hollow area, and the conveying pipe for conveying grouting material and the grouting pipe are connected through the second connecting component. When the conveying pipe conveys the grouting material into the grouting pipe, the grouting pipe grouts the hollow area through the overflow hole until the grouting material fills the hollow area, thereby improving the problem of hollowing of the secondary lining of the tunnel.

[0011] Preferably, the radius of each overflow hole is 1cm~3cm, a plurality of the overflow holes are arranged in a plum blossom shape on the grouting pipe, a plurality of groups of overflow holes arranged in a plum blossom shape form an overflow portion, and the distance between each group of grouting holes arranged in a plum blossom shape and an adjacent plum blossom shaped overflow hole is 8cm~12cm.

[0012] By adopting the above technical scheme, the radius of each overflow hole is set to 1cm~3cm, which can ensure the smooth outflow of grouting material and avoid material waste and structural strength reduction caused by excessive hole diameter. The plum blossom shape arrangement of the overflow holes is conducive to the uniform distribution of grouting material on the tunnel vault, avoiding excessive or insufficient grouting in local areas, thereby improving the uniformity and effect of grouting; the distance between each group of plum blossom-shaped overflow holes and the adjacent group is controlled between 8cm and 12cm. Such a spacing setting can not only ensure the continuity of grouting, but also prevent mutual interference caused by too close distance during the grouting process, ensuring that the grouting material can fill the empty area during grouting, further improving the problem of emptying of the secondary lining of the tunnel.

[0013] Preferably, there are several overflow parts, and a partition is provided between each overflow part and the adjacent overflow part, and the length of the partition is 18cm~22cm.

[0014] By adopting the above technical scheme, several overflow parts can ensure that the grouting material can be evenly distributed in the de-filled area, avoiding local over-injection or under-injection. The overflow parts are effectively separated by setting partitions, and the length of each partition is controlled between 18 cm and 22 cm. Such a design not only ensures the independence between adjacent overflow parts, but also ensures the fluidity and continuity of the grouting material between the overflow parts, thereby improving the grouting efficiency; at the same time, the partition can be connected to the first connecting component to ensure that the grouting material will not directly impact the first connecting component during grouting, thereby avoiding shaking or deviation of the grouting pipe during grouting, making the grouting process more stable.

[0015] Preferably, the diameter of the grouting pipe is 15 cm to 22 cm, and the wall thickness of the grouting pipe is 13 mm to 15 mm.

[0016] By adopting the above technical solution, the wall thickness of the grouting pipe is 13mm to 15mm. This thickness range provides the grouting pipe with sufficient mechanical strength to withstand the internal pressure that may be generated during the grouting process while resisting potential influences of the external environment, such as geological changes or mechanical damage during construction.

[0017] Preferably, the first connecting assembly includes a connecting piece and a limiting piece, the connecting piece and the limiting piece are integrally formed, the connecting piece is located at the arch top and is connected to a lining via a connecting piece, and the limiting piece is connected to the grouting pipe.

[0018] By adopting the above technical solution, the connecting plate and the limiting plate are integrally formed, which can enhance the structural stability of the first connecting component. When the connecting plate is connected to the first lining through the connecting piece, the positioning of the limiting plate can be completed at the same time, which is convenient for construction workers to install the tunnel second lining arch backfill grouting structure with mold, reducing the workload of construction workers.

[0019] Preferably, the connecting piece and the limiting piece are both arc-shaped, the radius of the connecting piece is larger than the radius of the limiting piece, the width of the limiting piece is 16 cm to 20 cm, and the limiting piece is used to accommodate the grouting pipe.

[0020] By adopting the above technical scheme, the arc-shaped design of the connecting piece enables the first connecting component to better adapt to the curvature of the tunnel vault and maintain a close fit with the first lining; the arc-shaped design of the limiting piece enables the construction personnel to fit the outer wall of the grouting pipe when fixing the grouting pipe, thereby providing stable support for the grouting pipe; the width of the limiting piece is 16cm~20cm, so that the limiting piece can be connected to the grouting pipe through the partition, avoiding the situation where the limiting piece covers the overflow hole, thereby preventing the grouting material at this position from overflowing, thereby ensuring that the grouting material is evenly distributed in the de-hollowed area.

[0021] Preferably, the second connecting assembly comprises a connecting plate, the connecting plate is provided with an exhaust hole and a connecting hole, the exhaust hole is used to exhaust gas, and the connecting hole is used to connect the conveying pipe and the grouting pipe.

[0022] By adopting the above technical solution, the exhaust holes arranged in the connecting plate can discharge the gas in the de-energized area during the grouting process, thereby improving the problem of excessive gas pressure caused by the inability of the gas in the de-energized area to overflow, avoiding possible safety hazards, and ensuring the personal safety of construction workers; the connecting hole can connect the delivery pipe and the grouting pipe, ensuring that the grouting material can be continuously poured into the de-energized area, further improving the grouting efficiency.

[0023] Preferably, the second connecting assembly is also provided with a joint, which includes a fixing part and a clamping part. The fixing part is arranged on the side of the connecting hole away from the grouting pipe, and the fixing part is provided with a channel for accommodating the conveying pipe, and the channel is communicated with the connecting hole. The clamping part is sleeved on the conveying pipe, and the clamping part is used to abut against the fixing part to limit the tightness of the fixing part.

[0024] By adopting the above technical solution, the fixing part can connect the delivery pipe with the grouting pipe, and the construction personnel can insert the delivery pipe into the through hole of the fixing part, and then clamp the delivery pipe by the clamping part, so as to realize the quick connection between the delivery pipe and the grouting pipe, and reduce the work intensity of the construction personnel in installing the tunnel secondary lining arch backfill with mold grouting structure.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The first connecting assembly can fix the grouting pipe at the vault of the tunnel, so that the grouting pipe is fixed in the hollow area, and the conveying pipe for conveying grouting materials and the grouting pipe are connected through the second connecting assembly. When the conveying pipe conveys the grouting material into the grouting pipe, the grouting pipe grouts the hollow area through the overflow hole until the grouting material fills the hollow area, thereby improving the problem of hollowing of the secondary lining of the tunnel;

[0027] 2. The radius of each overflow hole is set to 1cm~3cm, which can ensure the smooth outflow of grouting materials and avoid material waste and structural strength reduction caused by too large a hole diameter. The plum blossom-shaped arrangement of the overflow holes is conducive to the uniform distribution of grouting materials on the tunnel vault, avoiding excessive or insufficient grouting in local areas, thereby improving the uniformity and effect of grouting; the distance between each group of plum blossom-shaped overflow holes and the adjacent group is controlled between 8cm and 12cm. Such a spacing setting can not only ensure the continuity of grouting, but also prevent mutual interference caused by too close distance during the grouting process, ensuring that the grouting materials can fill the empty area during grouting, further improving the problem of emptying of the tunnel secondary lining;

[0028] 3. Several overflow parts can ensure that the grouting material can be evenly distributed in the de-hollowed area to avoid local over-injection or under-injection. The overflow parts are effectively separated by setting partitions, and the length of each partition is controlled between 18cm and 22cm. This design not only ensures the independence between adjacent overflow parts, but also ensures the fluidity and continuity of the grouting material between the overflow parts, thereby improving the grouting efficiency; at the same time, the partition can be connected to the first connecting component to ensure that the grouting material will not directly impact the first connecting component during grouting, thereby avoiding shaking or deviation of the grouting pipe during grouting, making the grouting process more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the existing tunnel structure;

[0030] Figure 2 It is a structural schematic diagram of the tunnel secondary lining vault backfilling mold grouting structure of the embodiment of the present application when it is connected to the conveying pipe;

[0031] Figure 3 is a schematic structural diagram of a first connection component in an embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of the structure of the grouting pipe of an embodiment of the present application;

[0033] Figure 5 is a schematic structural diagram of a connecting plate in an embodiment of the present application;

[0034] Figure 6 It is a schematic diagram of the exploded structure of the joint according to the embodiment of the present application.

[0035] Explanation of the accompanying drawings: 1. Grouting pipe; 2. First connecting component; 21. Connecting plate; 22. Limiting plate; 3. Second connecting component; 31. Connecting plate; 32. Exhaust hole; 33. Connecting hole; 34. Joint; 341. Fixing part; 342. Clamping part; 4. Overflow hole; 5. Overflow part; 6. Partition part; 7. First lining; 8. Second lining; 9. De-stressing area. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-6 This application is described in further detail.

[0037] In actual construction, the grouting material output by the grouting machine is usually transported to the required location through a delivery pipe.

[0038] The embodiment of the present application discloses a tunnel secondary lining vault backfilling grouting structure with a mold.

[0039] Reference Figure 1 , Figure 1 The positional relationship between the primary lining 7, the secondary lining 8 and the de-stressing area 9 is shown.

[0040] like Figure 2 As shown, the tunnel secondary lining vault backfilling grouting structure includes a first connecting component 2, a grouting pipe 1 and a second connecting component 3.

[0041] like Figure 2 and Figure 3As shown, the first connection component 2 includes a connection piece 21 and a limit piece 22. The connection piece 21 and the limit piece 22 are integrally formed to enhance the stability of the first connection component 2. The connection piece 21 is connected to a lining 7 through a connecting piece, and the connecting piece is specifically a nut used in conjunction with a nut. The connection piece 21 and the limit piece 22 are both arranged in an arc shape. The arc-shaped connection piece 21 can adapt to the curvature of the arch of the lining 7, so that when the construction personnel install the first connection component 2, the first connection component 2 can fit tightly with the lining 7. The arc-shaped setting of the limit piece 22 can make the limit piece 22 fit tightly with the outer wall of the grouting pipe 1 when accommodating the grouting pipe 1, so as to avoid the grouting pipe 1 repeatedly hitting the limit piece 22 when shaking, causing the first connection component 2 to separate from the lining 7, thereby providing stable support for the grouting pipe 1.

[0042] It should be noted that the radius of the connecting piece 21 needs to be set according to the curvature of the lining 7, and the radius of the limiting piece 22 needs to be set according to the specifications of the grouting pipe 1. In the embodiment of the present application, the radius of the connecting piece 21 and the radius of the limiting piece 22 are not specifically limited. The radius of the connecting piece 21 is larger than the radius of the limiting piece 22, so that the limiting piece 22 can be set on the side of the connecting piece 21 away from the lining 7, thereby improving the utilization rate of the space; at the same time, when connecting the connecting piece 21 and the lining 7, the construction personnel can complete the positioning of the limiting piece 22 without the need for secondary adjustment of the limiting piece 22, thereby reducing the work intensity of the construction personnel.

[0043] When construction workers need to install the first connecting component 2, they need to set the radius of the connecting piece 21 and the radius of the limiting piece 22 according to the curvature of the first lining 7 and the specifications of the grouting pipe 1, and open holes on the first lining 7 and the connecting piece 21 for the connecting parts to pass through, and fix the connecting piece 21 to the arch of the first lining 7 through the connecting parts and the holes.

[0044] In special circumstances, such as when the tunnel is long, in order to prevent the grouting pipe 1 from sagging under the action of uniform gravity, the construction personnel can draw a marking line at the arch position of the first lining 7 by means of chalk or the like, and set a plurality of first connecting components 2 along the length direction of the marking line, so as to fix the grouting pipe 1 in sections through the plurality of first connecting components 2, thereby improving the working stability of the grouting pipe 1 during the grouting process.

[0045] like Figure 4 As shown, the grouting pipe 1 is connected to the first connecting component 2. Specifically, the grouting pipe 1 is movably inserted in the part enclosed by the limiting plate 22. Since the first connecting component 2 is arranged on the arch of a lining 7 along the length direction of the tunnel, the grouting pipe 1 is longitudinally arranged in the tunnel and on the arch through the first connecting component 2, and is fixed in the hollow area 9.

[0046] The diameter of the grouting pipe 1 is 15cm~22cm, and the wall thickness of the grouting pipe 1 is 13mm~15mm. This wall thickness range provides the grouting pipe 1 with sufficient mechanical strength to withstand the internal pressure that may be generated during the grouting process, while resisting potential influences of the external environment, such as geological changes or mechanical damage during construction.

[0047] The grouting pipe 1 is provided with a plurality of overflow holes 4, each of which has a radius of 1 cm to 3 cm, so as to ensure that the grouting material can flow out smoothly through the overflow hole 4, and at the same time avoid the excessive outflow of grouting material at the front of the grouting pipe 1 due to the large hole diameter, and the occurrence of no grouting material at the rear of the grouting pipe 1, thereby reducing excessive or insufficient grouting in local areas, thereby improving the uniformity and effect of grouting; a plurality of overflow holes 4 are arranged in a plum blossom shape on the grouting pipe 1, and a plurality of groups of overflow holes 4 arranged in a plum blossom shape form an overflow portion 5. The overflow holes 4 arranged in a plum blossom shape are conducive to the uniform distribution of grouting material on the tunnel vault, further avoiding the occurrence of excessive or insufficient grouting in local areas, and further improving the uniformity and effect of grouting.

[0048] The distance between each group of plum blossom-shaped grouting holes and the adjacent plum blossom-shaped overflow holes 4 is 8 cm to 12 cm. Such a spacing setting can not only ensure the continuity of grouting, but also prevent mutual interference caused by too close distance during the grouting process, ensuring that the grouting material can fill the hollow area 9 during grouting, and further avoiding the occurrence of excessive or insufficient grouting in local areas, further improving the uniformity and effect of grouting, and improving the problem of hollowing out of the secondary lining of the tunnel.

[0049] It should be noted that there are several grouting parts, and a partition 6 is provided between each overflow part 5 and the adjacent overflow part 5. Several overflow parts 5 can ensure that the grouting material can be evenly distributed in the de-hollowing area 9 to avoid local over-injection or under-injection.

[0050] In the embodiment of the present application, the length of the partition 6 is 18cm~22cm. Such a design not only ensures the independence between adjacent overflow parts 5, but also ensures the fluidity and continuity of the grouting material between each overflow part 5, thereby improving the grouting efficiency; at this time, the width of the limiting plate 22 should be set to 16cm~20cm, so that the limiting plate 22 can contact with the grouting pipe 1 through the partition 6, so as to avoid the limiting plate 22 covering the overflow hole 4, thereby causing the grouting material at this position to be unable to overflow, and ensure that the grouting material is evenly distributed in the de-hollowing area 9; at the same time, the partition 6 can ensure that the grouting material will not directly impact the first connecting component 2 during grouting, thereby avoiding the grouting pipe 1 from shaking or shifting during grouting, making the grouting process more stable, and further improving the problem of de-hollowing of the secondary lining of the tunnel.

[0051] like Figure 5 and Figure 6As shown, the second connecting component 3 includes a connecting plate 31 and a joint 34. The connecting plate 31 is provided with an exhaust hole 32. The exhaust hole 32 can discharge the gas in the de-hollowed area 9 during the grouting process, thereby improving the problem of excessive gas pressure caused by the inability of the gas in the de-hollowed area 9 to overflow, avoiding possible safety hazards, and ensuring the personal safety of construction workers.

[0052] The connecting plate 31 is also provided with a connecting hole 33. The specifications of the connecting hole 33 need to be set according to the specifications of the grouting pipe 1. No specific limitation is made in the embodiment of the present application. The connecting hole 33 is connected to the grouting pipe 1 and the joint 34. The joint 34 is used to connect with the conveying pipe, so that the conveying pipe, the joint 34, the connecting hole 33 and the grouting pipe 1 are connected in sequence to form a grouting channel for grouting into the de-hollowed area 9, ensuring that the grouting machine can continuously irrigate the de-hollowed area 9.

[0053] It should be noted that the shape of the connecting plate 31 needs to be set according to the cross-sectional shape of the hollow area 9 to close the hollow area 9. The shape of the connecting plate 31 is not specifically limited in the embodiment of the present application.

[0054] The joint 34 is specifically an elastic pipe clamp, and the joint 34 includes a fixing member 341 and a clamping member 342. The fixing member 341 is specifically a plurality of elastic petals, and the plurality of elastic petals are evenly spaced to form a channel for inserting the delivery pipe. The clamping member 342 is specifically a movable sleeve joint 34. In the embodiment of the present application, the clamping member 342 and the fixing member 341 are also provided with matching threads and internal threads. The fixing member 341 is arranged on the side of the connecting plate 31 away from the grouting pipe 1. The channel of the fixing member 341 is connected to the connecting hole 33. The clamping member 342 is used to be sleeved on the delivery pipe. The construction personnel can insert the delivery pipe into the channel, push the clamping member 342 toward the direction of the connecting plate 31, and thread the clamping member 342 and the fixing member 341 to drive the fixing member 341 to clamp the delivery pipe, thereby quickly connecting the delivery pipe and the grouting pipe 1, reducing the work intensity of the construction personnel in installing the tunnel secondary lining arch backfill mold grouting structure.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tunnel secondary lining vault backfilling grouting structure, characterized in that: include: A grouting pipe (1) is longitudinally arranged in the tunnel and arranged on the vault, and the grouting pipe (1) is provided with a plurality of grouting holes (4); A first connection assembly (2) connected to the grouting pipe (1) and used to be connected to a lining (7) to limit the position of the grouting pipe (1); A second connecting assembly (3) is arranged at one end of the grouting pipe (1) and is used to connect the grouting pipe (1) with the conveying pipe; The diameter of the grouting pipe (1) is 15 cm to 22 cm, and the wall thickness of the grouting pipe (1) is 13 mm to 15 mm; The first connection assembly (2) comprises a connection piece (21) and a limit piece (22), the connection piece (21) and the limit piece (22) being integrally formed, the connection piece (21) being located at the arch and connected to a lining (7) via a connection piece, and the limit piece (22) being connected to the grouting pipe (1); The connecting piece (21) and the limiting piece (22) are both arc-shaped, the radius of the connecting piece (21) is greater than the radius of the limiting piece (22), the width of the limiting piece (22) is 16 cm to 20 cm, and the limiting piece (22) is used to accommodate the grouting pipe (1).

2. A tunnel secondary lining vault backfilling grouting structure according to claim 1, characterized in that: The radius of each overflow hole (4) is 1 cm to 3 cm, a plurality of the overflow holes (4) are arranged in a plum blossom shape on the grouting pipe (1), a plurality of groups of overflow holes (4) arranged in a plum blossom shape form an overflow portion (5), and the distance between each group of grouting holes arranged in a plum blossom shape and an adjacent overflow hole (4) arranged in a plum blossom shape is 8 cm to 12 cm.

3. A tunnel secondary lining vault backfilling grouting structure according to claim 2, characterized in that: A plurality of overflow portions (5) are provided, and a partition portion (6) is provided between each overflow portion (5) and an adjacent overflow portion (5), and the length of the partition portion (6) is 18 cm to 22 cm.

4. A tunnel secondary lining vault backfilling grouting structure according to claim 1, characterized in that: The second connection assembly (3) comprises a connection plate (31), the connection plate (31) being provided with an exhaust hole (32) and a connection hole (33), the exhaust hole (32) being used for exhausting gas, and the connection hole (33) being used for connecting the delivery pipe and the grouting pipe (1).

5. A tunnel secondary lining vault backfilling grouting structure according to claim 4, characterized in that: The second connecting assembly (3) is further provided with a joint (34), the joint (34) comprising a fixing member (341) and a clamping member (342), the fixing member (341) being arranged on a side of the connecting hole (33) away from the grouting pipe (1), the fixing member (341) being provided with a passage for accommodating a delivery pipe, the passage being communicated with the connecting hole (33), the clamping member (342) being sleeved on the delivery pipe, the clamping member (342) being used to abut against the fixing member (341) to limit the tightness of the fixing member (341).

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