Anti-seepage structure of shield tunnel

Abstract

The anti-seepage structure of the shield tunnel comprises a plurality of standard blocks, two adjacent blocks and a top sealing block, the standard blocks, the adjacent blocks and the top sealing block define an annular duct piece, the left end faces of the standard blocks, the adjacent blocks and the top sealing block are all provided with first connecting ends, and the right end faces of the standard blocks, the adjacent blocks and the top sealing block are all provided with second connecting ends. The first connecting end and the annularly adjacent second connecting end are connected in an inserted mode to form a first pouring cavity, third connecting ends are arranged on the front end faces of the standard block, the adjacent block and the top sealing block, fourth connecting ends are arranged on the rear end faces of the standard block, the adjacent block and the top sealing block, the third connecting ends and the longitudinally adjacent fourth connecting ends are connected to form a second pouring cavity, and the second pouring cavity is communicated with the first pouring cavity. And grouting holes are formed in the fourth connecting ends and used for grouting of the second pouring cavities and the first pouring cavities, and the problem that due to the fact that an existing pipe piece is poor in waterproof performance, after long-term use, part of water can enter from the pipe piece connecting position, and then water seepage occurs in a tunnel is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of seepage-proof structures of shield tunnel. BACKGROUND

[0002] Due to the uneven distribution of water resources in time and space in China, it is necessary to establish a series of water conservancy projects to balance the distribution of water resources in time and space to meet the needs of people's daily life and national economic development. In water conservancy projects, water conveying tunnels are hidden works and are prone to many hidden dangers. The most important thing is to prevent water seepage. Once water seeps, it can cause safety hazards to reservoirs or water conveying systems and easily cause waste of water resources. Current output tunnels are composed of multiple lining layers, and each lining layer is assembled from lining sheets. Therefore, there are gaps between the lining sheets. During the water conveying process in the water conveying tunnel, long-term flushing of the gaps between the lining sheet pieces can easily cause cracks to expand, and thus water seepage occurs. SUMMARY

[0003] To overcome the shortcomings of the prior art, the utility model provides a seepage-proof structure of shield tunnel, which solves the poor waterproof performance of the existing segment. After long-term use, some water can enter from the segment connection, which can cause water seepage problems in the tunnel.

[0004] To achieve the above purpose, the utility model employs the technical scheme of a seepage-proof structure of shield tunnel, which comprises multiple standard blocks, two adjacent blocks, and one top block. The standard blocks, adjacent blocks, and top block form a ring-shaped segment. The left end face of each of the standard blocks, adjacent blocks, and top block is provided with a first connecting end, and the right end face of each of the standard blocks, adjacent blocks, and top block is provided with a second connecting end. The first connecting end and the second connecting end adjacent in the ring direction are inserted and form a first pouring cavity. The front end face of each of the standard blocks, adjacent blocks, and top block is provided with a third connecting end, and the rear end face of each of the standard blocks, adjacent blocks, and top block is provided with a fourth connecting end. The third connecting end and the fourth connecting end adjacent in the longitudinal direction are connected and form a second pouring cavity. The second pouring cavity is in communication with the first pouring cavity. The fourth connecting end is provided with a grouting hole. The grouting hole is used for grouting of the second pouring cavity and the first pouring cavity.

[0005] Further, the first connecting end comprises a concave groove provided on the left end face of the standard block, adjacent block, and top block. The end face of the concave groove close to the third connecting end is provided with a communication port. The other end face of the concave groove is provided with two protruding ends in communication with the fourth connecting end. The second connecting end comprises an insertion block provided on the right end face of the standard block, adjacent block, and top block. The insertion block can be longitudinally inserted into the concave groove and connected by bolts.

[0006] Further, the upper protruding end is embedded with a nut, and the lower protruding end is provided with a recess. The insertion block is provided with a bolt through hole. The center points of the nut, recess, and bolt through hole are on the same axis.

[0007] Further, the fourth connecting end comprises a first arc-shaped slot on the front end face of the standard block, the abutting block and the capping block, and a second arc-shaped slot arranged symmetrically with the first arc-shaped slot, the third connecting end comprises an L-shaped arc-shaped plate arranged horizontally on the rear end face of the standard block, the abutting block and the capping block corresponding to the first arc-shaped slot, an arc-shaped through slot is arranged on the L-shaped arc-shaped plate, the arc-shaped through slot is used for penetrating the screw rod, and a limiting block is arranged corresponding to the second arc-shaped slot, the limiting block is clamped in the second arc-shaped slot, and the L-shaped arc-shaped plate is inserted into the first arc-shaped slot.

[0008] Further, a first sawtooth protrusion is arranged on the upper end face of the second arc-shaped slot, a second sawtooth protrusion is arranged on the upper end face of the limiting block, the first sawtooth protrusion is engaged with the second sawtooth protrusion, and the longitudinal staggered limiting of the annular pipe piece is realized through the engagement of the first sawtooth protrusion and the second sawtooth protrusion.

[0009] Further, waterproof mortar is injected into the first pouring cavity and the second pouring cavity, the grouting holes are plugged and smoothed.

[0010] Further, a permeable epoxy type waterproof anticorrosive paint is applied to the inner side of the annular pipe piece.

[0011] Beneficial effects: the first connecting end, the second connecting end, the third connecting end and the fourth connecting end are arranged on the standard block, the abutting block and the capping block, the connection between the annular adjacent blocks is realized through the first connecting end and the second connecting end, the connection between the longitudinal adjacent blocks is realized through the third connecting end and the fourth connecting end, the connection tightness between the reinforcing blocks is strengthened, the water resistance of the reinforcing blocks is improved, the multiple waterproofing is formed through the waterproof material and the waterproof mortar, and the anti-seepage function of the gap is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front view of the annular pipe piece;

[0013] Figure 2 It is a staggered schematic diagram of the anti-seepage structure;

[0014] Figure 3 It is a schematic diagram of the annular pipe piece;

[0015] Figure 4 It is a schematic diagram of the communication port;

[0016] Figure 5 It is a longitudinal standard block connection schematic diagram;

[0017] Figure 6 It is a schematic diagram of the other side of the longitudinal standard block.

[0018] Reference signs: 1, standard block; 2, abutment block; 3, capping block; 4, first connecting end; 41, concave groove; 42, communication port; 43, convex end; 5, second connecting end; 51, plug-in block; 6, first pouring cavity; 7, third connecting end; 71, L-shaped arc plate; 72, arc-shaped through slot; 73, limiting block; 8, fourth connecting end; 81, first arc-shaped slot; 82, second arc-shaped slot; 9, grouting hole; 10, bolt; 11, first sawtooth protrusion; 12, second sawtooth protrusion; 13, waterproof mortar; 14, permeable epoxy type waterproof anticorrosive coating. DETAILED DESCRIPTION

[0019] In order to further clarify the technical means and effects of the present application for achieving the predetermined object of the present application, the specific embodiments, structures, features and effects according to the present application are described in detail as follows in combination with the accompanying drawings and preferred embodiments.

[0020] Referring to the drawings as Figures 1-6As shown, the shield tunnel is a tunnel excavated by a shield machine below the ground, which is constructed by full mechanical excavation. In the prior art, segments are installed on the inner side wall of the shield tunnel, which supports the surrounding rock of the tunnel, and the segments also have the function of anti-seepage and waterproofing in the shield tunnel. However, there will be gaps between the segments, and water will still seep through the gaps after a long time. Therefore, the segments are designed to increase the tightness between the segments and achieve a sealing and fitting effect in combination with waterproof mortar 13 to prevent water from seeping through the gaps. The segments have a plurality of standard blocks 1, two adjacent blocks 2 and a top block 3. The standard blocks 1, the adjacent blocks 2 and the top block 3 form a ring. The two adjacent blocks 2 are arranged adjacent to the two side edges of the top block 3. The left end faces of the standard blocks 1, the adjacent blocks 2 and the top block 3 are provided with first connecting ends 4. The first connecting ends 4 include recessed grooves 41 provided on the left end faces of the standard blocks 1, the adjacent blocks 2 and the top block 3. The recessed grooves 41 are provided with communication openings 42 close to the end faces of third connecting ends 7. The other end faces of the recessed grooves 41 are provided with two protruding ends 43. The right end faces of the standard blocks 1, the adjacent blocks 2 and the top block 3 are provided with second connecting ends 5. The second connecting ends 5 include plug-in blocks 51 provided on the right end faces of the standard blocks 1, the adjacent blocks 2 and the top block 3. The plug-in blocks 51 can be inserted into the recessed grooves 41 through the two protruding ends 43 in the longitudinal direction and connected by bolts 10. The upper protruding ends 43 are provided with nuts, the lower protruding ends 43 are provided with recessed holes, and the plug-in blocks 51 are provided with spiral through holes. The center points of the nuts, the recessed holes and the through holes of the bolts 10 are on the same axis, and the bolts 10 are used to fix the adjacent blocks in the ring direction. The plug-in blocks 51 are water stop strips or are externally bonded with waterproof sealing pads. The first connecting ends 4 and the second connecting ends 5 of the adjacent blocks are plugged and form first pouring cavities 6. The first pouring cavities 6 are filled with waterproof mortar 13. The shape of the segments prolongs the path of water seepage, the water stop strips or the waterproof sealing pads provide the first waterproofing, and the waterproof mortar 13 provides the second waterproofing, thereby forming double waterproofing and improving the waterproof performance of the adjacent block ring-shaped joint gap.

[0021] As shown in the figure, in order to further improve the waterproof performance of the longitudinal pipe piece splicing gap, the fourth connecting end 8 is arranged on the rear end face of the standard block 1, the adjacent block 2 and the capping block 3, the fourth connecting end 8 includes the first arc-shaped slot 81 arranged on the front end face of the standard block 1, the adjacent block 2 and the capping block 3 and the second arc-shaped slot 82 arranged on the first arc-shaped slot 81 as the symmetric axis, the third connecting end 7 is arranged on the front end face of the standard block 1, the adjacent block 2 and the capping block 3, the third connecting end 7 includes the L-shaped arc-shaped plate 71 arranged on the rear end face of the standard block 1, the adjacent block 2 and the capping block 3 corresponding to the first arc-shaped slot 81, the arc-shaped through slot 72 arranged on the L-shaped arc-shaped plate 71, the arc-shaped through slot 72 for the screw rod to penetrate, the limiting block 73 arranged corresponding to the second arc-shaped slot 82, the limiting block 73 clamped in the second arc-shaped slot 82, the L-shaped arc-shaped plate 71 inserted into the first arc-shaped slot 81, and the L-shaped arc-shaped plate 71 made of waterproof elastic material. The longitudinal pipe pieces can be spliced by using a through joint or a staggered joint, the present application preferably uses a staggered joint between adjacent longitudinal pipe pieces, therefore the first sawtooth protrusion 11 is arranged on the upper end face of the second arc-shaped slot 82, the second sawtooth protrusion 12 is arranged on the upper end face of the limiting block 73, the second sawtooth protrusion 12 on the limiting block 73 engaged to the position of the first sawtooth protrusion 11, and the movement of the position between the longitudinal pipe pieces is limited without the bolt 10. The third connecting end 7 and the fourth connecting end 8 adjacent in the longitudinal direction are connected and form the second pouring cavity, the second pouring cavity forms an annular pouring cavity, the first pouring cavity 6 forms a rectangular pouring cavity connected to the annular pouring cavity, the first pouring cavity 6 and the second pouring cavity are connected, the grouting hole 9 is arranged on the fourth connecting end 8, the number of the grouting hole 9 is six according to the number of blocks, the grouting hole 9 is used for grouting, the waterproof mortar 13 is injected into the cavities of the first pouring cavity 6 and the second pouring cavity, the grouting hole 9 is plugged and smoothed, a certain water blocking effect is formed by the shape design of the standard block 1, the adjacent block 2 and the capping block 3, the waterproof material and the waterproof mortar 13 are combined to prevent water seepage of the annular gap and the longitudinal gap, the water seepage risk is reduced, and too many waterproof mechanical structures are not needed. In order to further increase the anti-seepage structure of the shield tunnel, the permeable epoxy type waterproof anticorrosive paint 14 is applied on the inner side of the annular pipe piece.

[0022] Working mode: first, the inner wall of the shield tunnel can be waterproofed by coating waterproof paint, and after the waterproof paint is fixed, the annular segment is laid, the annular segment includes multiple standard blocks 1, adjacent blocks 2 and top blocks 3, the annular segment is laid from bottom to top, from the standard block 1 to the adjacent block 2 to the top block 3, and the annular segment is formed, and the adjacent blocks are fixed through the bolts 10, then the tunnel is laid along the segment, the longitudinal adjacent segments are staggered, after laying for a distance, the six grouting holes 9 are aligned and grouted synchronously through the grouting equipment, the first pouring cavity 6 and the second pouring cavity are grouted with waterproof mortar 13, after the waterproof mortar 13 is solidified, the annular segment inner wall is coated with permeable epoxy type waterproof and anticorrosive paint 14, the overall anti-seepage effect of the shield tunnel is strengthened, and the subsequent work is ensured to reduce water seepage problems.

[0023] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any modification, change and modification of the above embodiment according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A shield tunnel anti-seepage structure comprising a plurality of standard blocks (1), two abutting blocks (2) and a capping block (3), the standard blocks (1), the abutting blocks (2) and the capping block (3) enclosing a ring-shaped segment, characterized in that: The left end face of the standard block (1), the abutment block (2) and the capping block (3) is provided with a first connecting end (4), and the right end face is provided with a second connecting end (5), the first connecting end (4) and the annularly adjacent second connecting end (5) are inserted and connected to form a first pouring cavity (6), the front end face of the standard block (1), the abutment block (2) and the capping block (3) is provided with a third connecting end (7), and the rear end face is provided with a fourth connecting end (8), the third connecting end (7) and the longitudinally adjacent fourth connecting end (8) are connected to form a second pouring cavity, the second pouring cavity is communicated with the first pouring cavity (6), the fourth connecting end (8) is provided with a grouting hole (9), and the grouting hole (9) is used for grouting of the second pouring cavity and the first pouring cavity (6).

2. The impermeable structure of a shield tunnel according to claim 1, characterized in that: The first connecting end (4) comprises a recessed groove (41) provided on the left end face of the standard block (1), the abutment block (2) and the capping block (3), the end face of the recessed groove (41) close to the third connecting end (7) is provided with a communication port (42), and the other end face is provided with two protruding ends (43) communicated with the fourth connecting end (8), the second connecting end (5) comprises an insertion block (51) provided on the right end face of the standard block (1), the abutment block (2) and the capping block (3), the insertion block (51) can be longitudinally inserted into the recessed groove (41) and connected by a bolt (10).

3. The impermeable structure of a shield tunnel according to claim 2, characterized in that: The upper protruding end (43) is embedded with a nut, the lower protruding end (43) is provided with a recess, the insertion block (51) is provided with a bolt (10) through hole, and the center points of the nut, the recess and the bolt (10) through hole are on the same axis.

4. The impermeable structure of a shield tunnel according to claim 3, characterized in that: The fourth connecting end (8) comprises a first arc-shaped slot (81) provided on the front end face of the standard block (1), the abutment block (2) and the capping block (3), and a second arc-shaped slot (82) provided on the front end face of the standard block (1), the abutment block (2) and the capping block (3) as a symmetric axis, the third connecting end (7) comprises an L-shaped arc-shaped plate (71) provided on the rear end face of the standard block (1), the abutment block (2) and the capping block (3) corresponding to the first arc-shaped slot (81), the L-shaped arc-shaped plate (71) is provided with an arc-shaped through groove (72), the arc-shaped through groove (72) is used for penetrating a screw rod, and a limiting block (73) is arranged corresponding to the second arc-shaped slot (82), the limiting block (73) is clamped in the second arc-shaped slot (82), and the L-shaped arc-shaped plate (71) is inserted into the first arc-shaped slot (81).

5. The impermeable structure of a shield tunnel according to claim 4, characterized in that: The upper end face of the second arc-shaped slot (82) is provided with a first sawtooth protrusion (11), the upper end face of the limiting block (73) is provided with a second sawtooth protrusion (12), the first sawtooth protrusion (11) is engaged with the second sawtooth protrusion (12), and the longitudinal ring pipe piece is limited by the engagement of the first sawtooth protrusion (11) and the second sawtooth protrusion (12).

6. The impermeable structure of a shield tunnel according to claim 5, characterized in that: The first pouring cavity (6) and the second pouring cavity are filled with waterproof mortar (13), the grouting hole (9) is plugged and smoothed.

7. The impermeable structure of a shield tunnel according to claim 6, characterized in that: The inside of the annular pipe piece is coated with a permeable epoxy type waterproof and anticorrosive paint (14).

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