CN220522587U - Lining structure of TBM crossing fault breaking belt - Google Patents
Lining structure of TBM crossing fault breaking belt Download PDFInfo
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- CN220522587U CN220522587U CN202322231562.4U CN202322231562U CN220522587U CN 220522587 U CN220522587 U CN 220522587U CN 202322231562 U CN202322231562 U CN 202322231562U CN 220522587 U CN220522587 U CN 220522587U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 199
- 239000010959 steel Substances 0.000 claims abstract description 199
- 239000004567 concrete Substances 0.000 claims abstract description 28
- 239000011435 rock Substances 0.000 claims abstract description 22
- 239000011378 shotcrete Substances 0.000 claims description 31
- 239000002131 composite material Substances 0.000 claims description 20
- 239000004746 geotextile Substances 0.000 claims description 12
- 239000004575 stone Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007569 slipcasting Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims 2
- 230000005641 tunneling Effects 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 15
- 238000010276 construction Methods 0.000 abstract description 12
- 239000002893 slag Substances 0.000 description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- 239000011150 reinforced concrete Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a lining structure of a TBM crossing fault fracture zone, and relates to the technical field of TBM construction of long tunnels. The method is characterized in that: the combined steel arch frame is adopted for primary support, has the characteristics of high strength, high rigidity and high stability, effectively intercepts a rock of a vault collapse of the TBM in a fault tunneling process through the combined steel arch frame, ensures safety of hydraulic appliances and constructors, enables the TBM to pass quickly, and forms a powerful primary support structure by injecting concrete into a collapse cavity and pouring the concrete into the cavity to be clung to surrounding rocks after the support is completed.
Description
Technical Field
The utility model belongs to the technical field of TBM construction of long and large tunnels, and particularly relates to a lining structure of a TBM crossing fault fracture zone.
Background
In an open type TBM construction tunnel, construction problems of bad strata such as faults with different sizes are frequently encountered, but due to the structure and construction characteristics of the TBM, the treatment difficulty after the TBM is trapped in the bad strata such as faults is far greater than that of the tunnel constructed by a drilling and blasting method, so that not only is the construction period delayed, but also the open type TBM is damaged, and even TBM construction failure is likely to be caused.
TBM is a hard rock development machine, is generally provided with preliminary bracing equipment such as jumbolter, steel arch erector, shotcrete system, but the shortcoming of the poor geological tunnel section supporting operation such as fault is still comparatively outstanding, and the time delay of supporting, time consuming overlength, construction safety guarantee degree near the shield are low, and the supporting operation degree of difficulty is big, very easily appears blocking the shield phenomenon. In the tunneling process of the open TBM, in order to improve the coping capability of the open TBM to cope with bad stratum, a reinforcing bar row supporting system is added on an open TBM shield, so that the timeliness of supporting operation is improved to a great extent, and the construction safety near the shield tail is effectively ensured. The supporting mode can play a better supporting role on small collapse blocks in the tunneling of the open TBM, but for medium to large collapse blocks, the rigidity of the steel bar row is insufficient to support the impact force of the collapse block on the steel bar row under the action of gravity, so that the collapse block is deformed to have the risk of secondary collapse, and further research is needed in view of the supporting mode of the steel bar row of the open TBM in the aspect of bad geology such as faults and the like.
Disclosure of Invention
The utility model aims to solve the technical problems that for medium to large collapse blocks, the rigidity of a steel bar row is insufficient to support the impact force of collapse blocks on the steel bar row under the action of gravity, and the steel bar row is deformed to cause secondary collapse, and the utility model aims to provide a lining structure of a TBM penetrating through a fault fracture zone, so that the problem of secondary collapse caused by deformation is solved.
The utility model is realized by the following technical scheme:
a lining structure of a TBM crossing fault fracture zone sequentially comprises collapse filling, primary support, a composite waterproof layer and secondary lining from outside to inside along the radial direction of a tunnel.
The primary support comprises cavity collapse filling concrete, sprayed concrete and a combined steel arch, wherein the cavity collapse filling concrete is arranged on the outermost layer, the sprayed concrete is arranged between the combined steel arch and the cavity collapse filling concrete, and finally the sprayed concrete is also arranged on the inner layer of the combined steel arch.
The combined steel arch consists of N arc steel members assembled into M annular combined steel arches in a tunnel through a plurality of connecting members, wherein N is more than or equal to 4, and M is a natural number which is not zero. The arc-shaped steel member comprises 1 top surface combined steel arch frame, 2 side surface combined steel arch frames and 1 bottom surface combined steel arch frame, wherein one end of the top surface combined steel arch frame is integrally connected with any one side surface combined steel arch frame by bolts or high-strength bolts, the other end of any one side surface combined steel arch frame is integrally connected with the bottom surface combined steel arch frame by bolts or high-strength bolts, the other end of the bottom surface combined steel arch frame is welded with one end of the other side surface combined steel arch frame, the other end of the other side surface combined steel arch frame is integrally connected with the top surface combined steel arch frame by bolts or high-strength bolts, and inverted arch blocks are installed and fixed on the bottom surface combined steel arch frame.
The secondary lining is of a reinforced concrete structure, and the secondary lining and the inverted arch block are cast into a whole through reinforced concrete.
The bottom surface combination steel arch frame comprises arc-shaped channel steel and stiffening ribs, a plurality of stiffening ribs are welded between the arc-shaped channel steel, the stiffening ribs are detachably arranged, the top surface combination steel arch frame comprises a steel plate, a plurality of grouting or concrete pouring reserved holes are formed in the steel plate, the side surface combination steel arch frame comprises arc-shaped channel steel, reinforcing steel meshes and stiffening ribs, the arc-shaped channel steel is welded and fixed with the dense reinforcing steel meshes, a plurality of stiffening ribs are welded between the arc-shaped channel steel, and the stiffening ribs cannot be removed.
The top of the combined steel arch frame is a steel plate and is provided with a plurality of grouting holes, grouting reinforcement is carried out on a collapsed collapse body or a collapse cavity is filled, and then the combined steel arch frame is immediately wrapped by high-strength sprayed concrete to form a powerful supporting lining structure. The steel bar row at the vault part is prevented from influencing the later grouting construction to a certain extent.
Preferably, the connecting member is a bolt, which connects adjacent annular composite steel arches into a whole through a bolt opening at one side of the annular composite steel arch.
Preferably, M steel cushion blocks are arranged between the arc channel steel of the bottom surface combined steel arch in the annular combined steel arch and the excavated rock wall at equal intervals, wherein M is more than or equal to 3. And 2 pin locking anchor rods with the length of L are arranged at the junction of the arc channel steel of the 2 side face combined steel arches and the stiffening rib of the bottom face combined steel arch in the annular combined steel arch, wherein L is a natural number which is not zero and is more than or equal to 1m, and the pin locking anchor rods are screw-thread reinforcing steel bars with the diameter of D, wherein D is more than or equal to 22mm.
Preferably, the 2 side face combined steel arches and the rock wall excavated by the side face combined steel arches are filled and wrapped by sprayed concrete, the space between the steel plate of the bottom face combined steel arches and the rock wall excavated, the space between the steel plate of the bottom face combined steel arches and the inverted arch block are filled by fine stone concrete, the space between the steel plate of the top face combined steel arches and the rock wall collapsed is filled closely by concrete and light materials through grouting pipes, and the inner side of the steel plate of the top face combined steel arches is wrapped by sprayed concrete.
Preferably, the composite waterproof layer comprises geotextile and waterproof plates, wherein the geotextile is clung to the surface of the shotcrete of the primary support and is annularly laid to arch feet at two sides of the inverted arch block, and the waterproof plates are further arranged between the geotextile and the concrete of the secondary lining.
Preferably, the composite waterproof layer further comprises annular drainage pipes which are tightly attached to the sprayed concrete surface and are arranged between the sprayed concrete surface of the primary support and the geotechnical cloth, longitudinal drainage pipes are further arranged on arch feet on two sides of the inverted arch block and the sprayed concrete surface of the primary support along the tunnel direction, the annular drainage pipes are connected with the longitudinal drainage pipes through tee joints, and one ends of the tee joints are communicated with drainage channels on two sides of the inverted arch block to be reversely wrapped by the composite mode layer.
In the tunneling process, if the surrounding rock of the face is broken or is in the poor geology condition such as the middle weak strong water-rich region, auxiliary measures such as the face chemical grouting, curtain grouting, advance pipe canopy grouting and the like can be combined, and then the lining structure can be used if the surrounding rock of the face is broken or is in the poor geology such as the middle weak strong water-rich region, and the like.
The combined steel arch frame can be quickly assembled into a circle in the shield in the tunneling process of the open TBM, and the shield can be slowly moved out in the tunneling process of the TBM, so that the combined steel arch frame is arranged at a designated position, collapse stones can be blocked outside the combined steel arch frame, the slag removal workload is reduced, and the safety threat of collapse blocks at the top of the shield to personnel and the damage to equipment in the tunneling process of the open TBM are reduced. Meanwhile, the shutdown caused by various reasons such as excessively large collapse slag inlet quantity, excessively large belt pressing, excessively large cutter disc moment resistance caused by large loose material block, unlimited cavity collapse trend caused by continuous slag inlet, out-of-control of the machine head trend, large support work load of support boots, large blocking shield and the like caused by large fault can be avoided.
The lining structure plays a main role in a strong supporting structure formed by a plurality of adjacent combined steel arches which are connected into a whole in a circumferential direction, integrates the combined supporting functions of the steel arches, the steel mesh sheets and the steel bar rows, has the advantages of high strength, high rigidity, good longitudinal overall stability and high bearing capacity, can not deform under the impact of the gravity of larger collapse stones and keep stable, forms an effective supporting system for the collapse body, prevents the possibility that the collapse body continues to expand outwards, and can improve the safety and tunneling efficiency of the TBM in bad geological sections.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. the combined steel arch frame can be quickly assembled into a circle in the shield in the tunneling process of the open TBM, and the shield is slowly moved out in the tunneling process of the TBM, so that the combined steel arch frame is supported to the designed radian by means of the arch frame assembling device to be tightly attached to surrounding rock, collapse stones can be blocked outside the combined steel arch frame, the slag removal workload is reduced, and the safety threat of collapse blocks at the top of the shield to personnel and the damage to equipment in the tunneling process of the open TBM are reduced. Meanwhile, the shutdown caused by various reasons such as excessively large collapse slag inlet quantity, excessively large belt pressing, excessively large cutter disc moment resistance caused by large loose material block, unlimited cavity collapse trend caused by continuous slag inlet, out-of-control of the machine head trend, large support work load of support boots, large blocking shield and the like caused by large fault can be avoided.
2. The top of the combined steel arch frame is a steel plate and is provided with a plurality of grouting holes, grouting reinforcement is carried out on a collapsed collapse body or a collapse cavity is filled, and then the combined steel arch frame is immediately wrapped by high-strength sprayed concrete to form a powerful supporting lining structure. The steel bar row at the vault part is prevented from influencing the later grouting construction to a certain extent.
3. The lining structure plays a main role in a strong supporting structure formed by a plurality of adjacent combined steel arches which are connected into a whole in the circumferential direction, integrates the combined supporting functions of the steel arches, the steel mesh sheets and the steel bar rows, has the advantages of high strength, high rigidity, good longitudinal overall stability and high bearing capacity, can not deform under the impact of the gravity of larger collapse stones and keep stable, forms an effective supporting system for the collapse body, prevents the possibility that the collapse body continues to expand outwards, and can improve the safety and tunneling efficiency of the TBM in bad geological sections.
4. The steel plate with a certain thickness of the combined steel arch frame of the top surface in the lining structure has a better supporting and blocking function on the collapse and falling stone, so that the collapse and falling stone is prevented from occupying a supporting section, and the workload of occupying the section by secondary treatment is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model. In the drawings:
FIG. 1 is a cross-sectional view of a lining structure of the present utility model with a collapse depth of less than or equal to 2 m;
FIG. 2 is a cross-sectional view of the lining structure of the present utility model with a collapsed cavity depth greater than 2 m;
FIG. 3 is a side view of a lining structure of the present utility model;
fig. 4 is a full ring schematic of the composite steel arch of the present utility model.
In the figure, 1-collapse of the rock wall; 2, excavating a rock wall; 3-steel cushion blocks; 4-a combined steel arch; 5-locking the foot anchor rod; 6-spraying concrete; 7-upward arch blocks; 8-grouting holes; 9-fine stone concrete; 10-grouting pipe; 11-concrete; 12-a composite waterproof layer; 13-longitudinal drain pipes; 14-secondary lining; 15-lightweight material; 16-section steel arch centering; 17-geotextile; 18-waterproof board; 19-a circumferential drain pipe; 20-latch openings; 21-a bolt; 22-stiffeners; 23-channel steel; 24-reinforcing steel bar meshes; 25-steel plate; 26-top surface combined steel arch; 27-side face combined steel arch frames; 28-bottom combined steel arch.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are only for explaining the present utility model and are not limiting the present utility model. It should be noted that the present utility model is already in a practical development and use stage.
Examples
Combining a 22.13 km-level extra-long tunnel in Xinjiang, adopting a 3 hole+4 vertical shaft design scheme for the tunnel at a high-cold high-altitude area, adopting an open TBM method for tunneling a middle pilot tunnel, designing the excavation diameter of 8430mm, the total machine length of 285m, tunneling the open TBM for 10.801km, sequentially traversing the stroke granite porphyry, the marble sandy slate and the granite, traversing 4 fracture zones, and enabling the TBM to collapse 59 times in the tunneling process, wherein the maximum collapse is 13m multiplied by 7m multiplied by 6m (longitudinal multiplied by ring multiplied by depth), and providing a lining structure of the TBM traversing fault fracture zone for overcoming the damage of collapse blocks to personnel and equipment in the process;
as shown in fig. 1-4, a lining structure of a TBM crossing a fault fracture zone sequentially comprises collapse filling, primary support, a composite waterproof layer 12 and a secondary lining 14 from outside to inside along the radial direction of a tunnel.
The primary support comprises cavity collapse filling concrete 11, sprayed concrete 6 and a combined steel arch 4, wherein the cavity collapse filling concrete 11 is arranged on the outermost layer, the sprayed concrete 6 is arranged between the combined steel arch 4 and the cavity collapse filling concrete 11, and finally the sprayed concrete 6 is also arranged on the inner layer of the combined steel arch 4.
The combined steel arch 4 is formed by assembling 4 arc-shaped steel members into a plurality of annular combined steel arches 4 in a tunnel through a plurality of connecting members, wherein N is more than or equal to 4, and M is a natural number which is not zero. The arc-shaped steel member comprises 1 top surface combined steel arch 26, 2 side surface combined steel arches 27 and 1 bottom surface combined steel arch 28, wherein one end of the top surface combined steel arch 26 is integrally connected with any one side surface combined steel arch 27 by adopting a bolt connection or a high-strength bolt connection, the other end of any one side surface combined steel arch 27 is integrally connected with the bottom surface combined steel arch 28 by adopting a bolt connection or a high-strength bolt connection, the other end of the bottom surface combined steel arch 28 is welded with one end of the other side surface combined steel arch 27, the other end of the other side surface combined steel arch 27 is integrally connected with the top surface combined steel arch 26 by adopting another bolt connection or a high-strength bolt connection, and the pitching block 7 is installed and fixed on the bottom surface combined steel arch 28.
The secondary lining 14 is of a reinforced concrete structure, and the secondary lining 14 and the inverted arch block 7 are cast into a whole through reinforced concrete.
The bottom surface combination steel bow member 28 includes arc channel-section steel 23, stiffening rib 22, welds a plurality of stiffening ribs 22 between the arc channel-section steel 23, and wherein stiffening rib 22 is detachable the setting, and top surface combination steel bow member 26 includes steel sheet 25, and steel sheet 25 is provided with a plurality of slip casting or concrete filling preformed hole, and side combination steel bow member 27 includes arc channel-section steel 23, reinforcing bar net 24, stiffening rib 22, and wherein arc channel-section steel 23 and intensive reinforcing bar net welded fastening welds a plurality of stiffening rib 22 between the arc channel-section steel 23, stiffening rib 22 must demolish.
The top of the combined steel arch 4 is provided with a steel plate 25 and a plurality of grouting holes 8, grouting reinforcement is carried out on the collapsed collapse body or the collapse cavity is filled, and then the combined steel arch 4 is immediately wrapped by high-strength sprayed concrete 6 to form a powerful supporting lining structure. The steel bar row at the vault part is prevented from influencing the later grouting construction to a certain extent.
The connecting members are bolts 21 which connect adjacent ring-shaped composite steel arches 4 into a whole through bolt openings 20 at one side of the ring-shaped composite steel arches 4.
M steel cushion blocks 3 are arranged between the arc channel steel 23 of the bottom surface combined steel arch 28 in the annular combined steel arch 4 and the excavated rock wall 2 at equal intervals, wherein M is more than or equal to 3. 2 lock foot anchor rods 5 with the length of L are arranged at the junction of the arc channel steel 23 of the 2 side face combined steel arches 27 and the stiffening rib 22 of the bottom face combined steel arch 28 in the annular combined steel arch 4, wherein L is a natural number which is not zero, L is more than or equal to 1m, the lock foot anchor rods 5 are screw-thread reinforcing steel bars with the diameter of D, and D is more than or equal to 22mm.
The 2 side face combined steel arches 27 and the excavated rock wall 2 are filled and wrapped by adopting sprayed concrete 6, the space between the steel plate 25 of the bottom face combined steel arches 28 and the excavated rock wall 2 and the space between the steel plate 25 of the bottom face combined steel arches 28 and the inverted arch block 7 are filled by adopting fine stone concrete 9, the space between the steel plate 25 of the top face combined steel arches 26 and the collapsed rock wall 1 is filled and compacted by adopting concrete 11 and light materials 15 through grouting pipes 10, and the inner side of the steel plate 25 of the top face combined steel arches 26 is wrapped by adopting sprayed concrete 6.
The composite waterproof layer 12 comprises geotextile 17 and waterproof plates 18, wherein the geotextile 17 is annularly laid to arch feet on two sides of the inverted arch block 7 close to the surface of the primary support shotcrete 6, and the waterproof plates 18 are further arranged between the geotextile 17 and the concrete 11 of the secondary lining 14.
The composite waterproof layer 12 further comprises annular drainage pipes which are arranged between the surface of the primary support sprayed concrete 6 and the geotechnical cloth 17 in a close contact manner and at intervals on the surface of the sprayed concrete 6, longitudinal drainage pipes 13 are further arranged on arch feet on two sides of the inverted arch block 7 and the surface of the primary support sprayed concrete 6 along the tunnel direction, the annular drainage pipes 19 are connected with the longitudinal drainage pipes 13 through tee joints, one ends of the tee joints are communicated with drainage channels on two sides of the inverted arch block 7, and the longitudinal drainage pipes 13 are reversely covered by the composite mode layer.
The grouting holes 8 penetrate through the arc-shaped upward arch blocks 7 and are in mirror symmetry with the vertical lines of the upper end faces of the arc-shaped upward arch blocks 7 about the primary lining center, and the extension line of the axis of any one grouting hole 8 is intersected with the extension line of the vertical lines.
In the tunneling process, if the surrounding rock of the face is broken or is in the poor geology condition such as the middle weak strong water-rich region, auxiliary measures such as the face chemical grouting, curtain grouting, advance pipe canopy grouting and the like can be combined, and then the lining structure can be used if the surrounding rock of the face is broken or is in the poor geology such as the middle weak strong water-rich region, and the like.
The combined steel arch 4 can be quickly assembled into a circle in the shield in the tunneling process of the open TBM, and the shield can be slowly moved out in the tunneling process of the TBM, so that the combined steel arch 4 is arranged at a designated position, collapse stones can be blocked outside the combined steel arch 4, the slag removal workload is reduced, and the safety threat of collapse blocks at the top of the shield to personnel and the damage to equipment in the tunneling process of the open TBM are reduced. Meanwhile, the shutdown caused by various reasons such as excessively large collapse slag inlet quantity, excessively large belt pressing, excessively large cutter disc moment resistance caused by large loose material block, unlimited cavity collapse trend caused by continuous slag inlet, out-of-control of the machine head trend, large support work load of support boots, large blocking shield and the like caused by large fault can be avoided.
The lining structure plays a main role in a strong supporting structure formed by a plurality of adjacent combined steel arches which are connected into a whole in the circumferential direction, integrates the combined supporting functions of the steel arches 16, the steel mesh 24 and the steel bar rows, has the advantages of high strength, high rigidity, good longitudinal overall stability and high bearing capacity, can not deform and keep stable under the impact of the gravity of larger collapse stones, forms an effective supporting system for the collapse body, prevents the possibility of the collapse body from continuously expanding outwards, and can improve the safety and tunneling efficiency of the TBM in bad geological sections.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (6)
1. The lining structure of the TBM crossing fault fracture zone is characterized by sequentially comprising collapse filling, primary support, a composite waterproof layer (12) and a secondary lining (14) from outside to inside along the radial direction of a tunnel;
the primary support comprises cavity collapse filling concrete (11), sprayed concrete (6) and a combined steel arch (4), wherein the cavity collapse filling concrete (11) is arranged on the outermost layer, the sprayed concrete (6) is arranged between the combined steel arch (4) and the cavity collapse filling concrete (11), and finally the sprayed concrete (6) is also arranged on the inner layer of the combined steel arch (4);
the combined steel arch (4) is formed by assembling N arc-shaped steel members into M annular combined steel arches (4) in a tunnel through a plurality of connecting members, wherein N is more than or equal to 4, M is a natural number which is not zero, the arc-shaped steel members comprise 1 top combined steel arch (26), 2 side combined steel arches (27) and 1 bottom combined steel arch (28), one end of the top combined steel arch (26) and any one side combined steel arch (27) are connected into a whole through bolts or high-strength bolts, the other end of any one side combined steel arch (27) and the bottom combined steel arch (28) are connected into a whole through bolts or high-strength bolts, the other end of the bottom combined steel arch (28) and one end of the other side combined steel arch (27) are welded and connected into a whole through bolts or high-strength bolts, the other end of the other side combined steel arch (27) and the top combined steel arch (26) are additionally connected into a whole through bolts or high-strength bolts, the inverted arch block (7) is mounted and fixed on the bottom combined steel arch (28), and the secondary arch (14) is formed into a concrete lining (14) through a concrete pouring integral arch structure;
the bottom surface combination steel bow member (28) includes arc channel-section steel (23), stiffening rib (22), welding a plurality of stiffening rib (22) between arc channel-section steel (23), top surface combination steel bow member (26) include steel sheet (25), steel sheet (25) are provided with a plurality of slip casting or concrete filling preformed hole, side combination steel bow member (27) include arc channel-section steel (23), reinforcing bar net piece (24), stiffening rib (22), wherein arc channel-section steel (23) and intensive reinforcing bar net welded fastening, welding a plurality of stiffening rib (22) between arc channel-section steel (23).
2. A lining structure for a TBM crossing fault breaking belt according to claim 1, characterized in that the connecting members are bolts (21) connecting adjacent ring-shaped composite steel arches (4) as a whole through bolt openings (20) at one side of the ring-shaped composite steel arches (4).
3. The lining structure of a TBM crossing fault breaking belt according to claim 1, characterized in that, arc-shaped channel steel (23) of a bottom combined steel arch (28) in an annular combined steel arch (4) and an excavated rock wall (2) are provided with M steel cushion blocks (3) at equal intervals, wherein M is more than or equal to 3, 2 foot locking anchor rods (5) with the length L are arranged at the junction of the arc-shaped channel steel (23) of 2 side combined steel arches (27) in the annular combined steel arch (4) and stiffening ribs (22) of the bottom combined steel arch (28), wherein L is a natural number which is not zero and L is more than or equal to 1M, and the foot locking anchor rods (5) are screw-thread steel bars with the diameter D, wherein D is more than or equal to 22mm.
4. The lining structure of the TBM crossing fault breaking belt according to claim 1, wherein sprayed concrete (6) is adopted between the 2 side combined steel arches (27) and the excavated rock wall (2) for filling and wrapping, the space between the steel plate (25) of the bottom combined steel arches (28) and the excavated rock wall (2), the space between the steel plate (25) of the bottom combined steel arches (28) and the inverted arch block (7) are respectively filled with fine stone concrete (9), and the space between the steel plate (25) of the top combined steel arches (26) and the collapsed rock wall (1) is filled with concrete (11) and light materials (15) through grouting pipes (10), and the inner side of the steel plate (25) of the top combined steel arches (26) is wrapped with sprayed concrete (6).
5. A lining structure of a TBM crossing fault breaking belt according to claim 1, characterized in that the composite waterproof layer (12) comprises geotextile (17) and waterproof board (18), wherein the geotextile (17) is closely attached to the surface of the primary support sprayed concrete (6), the geotextile (17) is annularly laid to arch feet at two sides of the inverted arch block (7), and the waterproof board (18) is further arranged between the geotextile (17) and the concrete (11) of the secondary lining (14).
6. The lining structure of a TBM crossing fault breaking belt according to claim 5, wherein the composite waterproof layer (12) further comprises annular drainage pipes which are closely attached to the surface of the sprayed concrete (6) between the surface of the sprayed concrete (6) and geotextile (17), longitudinal drainage pipes (13) are further arranged on the arch feet on two sides of the inverted arch block (7) and the surface of the sprayed concrete (6) of the primary support along the tunnel direction, the annular drainage pipes (19) are connected with the longitudinal drainage pipes (13) through tee joints, one ends of the tee joints are connected with drainage channels on two sides of the inverted arch block (7) in a penetrating mode, and the longitudinal drainage pipes (13) are reversely covered by the composite mode layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322231562.4U CN220522587U (en) | 2023-08-18 | 2023-08-18 | Lining structure of TBM crossing fault breaking belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322231562.4U CN220522587U (en) | 2023-08-18 | 2023-08-18 | Lining structure of TBM crossing fault breaking belt |
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| Publication Number | Publication Date |
|---|---|
| CN220522587U true CN220522587U (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322231562.4U Active CN220522587U (en) | 2023-08-18 | 2023-08-18 | Lining structure of TBM crossing fault breaking belt |
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| Country | Link |
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