CN111156030A - Anti-bottom-bulging prefabricated assembled tunnel inverted arch structure, assembled tunnel and method - Google Patents
Anti-bottom-bulging prefabricated assembled tunnel inverted arch structure, assembled tunnel and method Download PDFInfo
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- CN111156030A CN111156030A CN202010005704.3A CN202010005704A CN111156030A CN 111156030 A CN111156030 A CN 111156030A CN 202010005704 A CN202010005704 A CN 202010005704A CN 111156030 A CN111156030 A CN 111156030A
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- 238000000034 method Methods 0.000 title abstract description 7
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims abstract description 12
- 238000010276 construction Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000004567 concrete Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 2
- 238000009417 prefabrication Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses an inverted arch structure of a bottom-bulging-resistant prefabricated assembled tunnel, an assembled tunnel and a method, wherein the technical scheme is as follows: the device comprises a first inverted arch sub-block and a second inverted arch sub-block which are symmetrically arranged, wherein a rhombic grid is connected between the first inverted arch sub-block and the second inverted arch sub-block; first inverted arch piecemeal, second inverted arch piecemeal form inverted arch constitutional unit through concreting, and multisection inverted arch constitutional unit vertically splices in proper order and constitutes whole assembled inverted arch structure. The tunnel inverted arch adopts a prefabricated assembly type, and the inverted arch structure adopts industrialized and standardized prefabrication and is easy to install; and the bottom bulge at the uppermost position in the middle of the inverted arch filling can be protected, and the top tensile stress is reduced, so that the development of tensile cracks at the position is reduced.
Description
Technical Field
The invention relates to the field of tunnel construction, in particular to an inverted arch structure of a bottom-bulging-resistant prefabricated assembled tunnel, an assembled tunnel and a method.
Background
The inverted arch is a reverse arch structure arranged at the bottom of the tunnel for improving the stress condition of an upper supporting structure, is one of main components of the tunnel structure, and is used for effectively transmitting the pressure of the stratum at the upper part of the tunnel to the ground through a side wall structure of the tunnel or the load on the road surface and also effectively resisting the counter force transmitted from the stratum at the lower part of the tunnel. The inverted arch and the secondary lining form a whole tunnel, so that the structural stability is improved. But the inverted arch structure in the tunnel is often cracked or damaged, and the running safety of the train is seriously influenced. With the continuous improvement of construction technology, construction level and construction requirements, more and more new technologies, new processes and new construction methods are applied to the construction of tunnels and underground engineering. In recent years, with the rapid development of economy in China, the requirement for vigorously developing the assembly type building is already put forward. The assembly type building is a great change of the construction mode, and is beneficial to saving resources, reducing construction pollution, improving the working environment, improving the labor production efficiency, improving the standardized operation and ensuring the quality and the safety level. However, due to various factors, the construction mode of the current drilling and blasting method for constructing the tunnel is mainly cast-in-place operation, the construction proportion of the fabricated tunnel is very low, and the difference is very large compared with the requirement.
The inventor finds that the inverted arch in the tunnel has two kinds of plain concrete and reinforced concrete at present, and the inverted arch is filled and is plain concrete, and the tunnel section is mostly the horseshoe-shaped, and both inverted arch camber is general not big, leads to the inverted arch structure when bearing great buoyancy, can not effectively utilize the arch effect to resist buoyancy for the inverted arch pucking phenomenon is comparatively general. The maximum tensile stress in the structure occurs at a position above the filling center of the inverted arch, where tensile cracks generally develop more. According to the related statistics of the currently operated railway tunnel, particularly a high-speed railway tunnel, diseases such as inverted arch bottom bulging, slurry turning and mud pumping appear in part of the tunnel, and the like, the track bed is cracked and deformed seriously, so that the speed limit of the tunnel during driving is limited, and the normal operation of a high-speed railway is influenced. Through inspection, the insufficient inverted arch quality of the tunnel is also one of the main influencing factors.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a bottom-drum-resistant prefabricated assembled tunnel inverted arch structure, which can protect the bottom drum filled in the middle uppermost position of the inverted arch and reduce the top tensile stress.
The second purpose of the invention is to provide an assembled tunnel, the inverted arch structure of which is prefabricated in a factory and standardized way, and the quality is ensured reliably.
The third purpose of the invention is to provide a construction method of the inverted arch structure of the anti-bottom-bulging prefabricated assembled tunnel, which can realize the rapid installation of the inverted arch and is easy to install.
The invention adopts the following technical scheme:
a prefabricated assembled tunnel inverted arch structure resisting bottom bulging comprises a first inverted arch sub-block and a second inverted arch sub-block which are symmetrically arranged, wherein a rhombic grid is connected between the first inverted arch sub-block and the second inverted arch sub-block; first inverted arch piecemeal, second inverted arch piecemeal form inverted arch constitutional unit through concreting, and multisection inverted arch constitutional unit vertically splices in proper order and constitutes whole assembled inverted arch structure.
Furthermore, the rhombus grid is connected with the first inverted arch block and the second inverted arch block through the cushion blocks respectively, and the rhombus grid comprises four supporting rods which are connected in a head-tail rotating mode in sequence.
Further, adjacent struts are connected by bolts.
Furthermore, the first inverted arch sub-block and the second inverted arch sub-block are used for connecting one end of the secondary lining and respectively reserve a steel bar joint, and the opposite sides of the first inverted arch sub-block and the second inverted arch sub-block respectively reserve a steel bar joint.
Furthermore, the first inverted arch sub-block and the second inverted arch sub-block are provided with a plurality of water drainage channels.
Further, the drainage channel has a downward slope.
Furthermore, a waterproof layer is arranged below the inverted arch structure unit.
The utility model provides an assembled tunnel, includes anti-pucking's prefabricated pin-connected panel tunnel invert structure, the outer end of first invert piecemeal, second invert piecemeal is located tunnel preliminary bracing inboard and links up with arch wall secondary lining, and the joint face department of just first invert piecemeal, second invert piecemeal and arch wall secondary lining sets up tenon fourth of the twelve earthly branches structure.
Furthermore, a base cushion layer is arranged below the assembled tunnel inverted arch structure.
A construction method of a bottom-bulging-resistant prefabricated assembled tunnel inverted arch structure comprises the following steps:
A. excavating the tunnel and constructing primary tunnel support;
B. excavating an inverted arch, leveling and carrying out substrate treatment, transporting the prefabricated first inverted arch block and the prefabricated second inverted arch block to a position to be installed, placing the first inverted arch block firstly, and then placing the second inverted arch block;
C. after the inverted arch sub-blocks are assembled in place, connecting the rhombic grids between the first inverted arch sub-block and the second inverted arch sub-block through bolts, and then connecting and fixing the inverted arch sub-blocks and the primary support of the tunnel;
D. steel bar joints are reserved on two sides of the first inverted arch block and the second inverted arch block and are connected with steel bars of a cast-in-place arch wall secondary lining; pouring arch wall lining concrete again, and closing a lining structure;
E. pouring concrete between the first inverted arch block and the second inverted arch block, and filling a leveling layer;
F. grouting to the bottom through grouting holes reserved in the first inverted arch block and the second inverted arch block;
G. and D, repeating the steps A-F to assemble the next inverted arch structure unit.
Compared with the prior art, the invention has the beneficial effects that:
1. the tunnel inverted arch is prefabricated, the inverted arch structure is prefabricated in an industrialized and standardized mode, the quality is reliable and guaranteed, the conventional inverted arch trestle construction cast-in-place mode is replaced by the tunnel inverted arch assembly construction mode, and the quality, the strength and the like of a prefabricated component are much better than those of a cast-in-place structure;
2. after the bottom of the rhombic grid is acted by a floating force, the angular point at the bottom moves upwards to force the left and right angular points to move leftwards and rightwards respectively, so that the upper end of the rhombic structure tends to move downwards, the bottom drum at the uppermost position in the middle of the inverted arch is protected, the top tensile stress is reduced, and the development of tensile cracks at the position is reduced;
3. the invention can realize the early and rapid placement of the inverted arch; the inverted arch blocks are directly moved into the tunnel without rotating in the tunnel, are offset left and right, are directly placed and are easy to install;
4. according to the invention, the drainage channel is arranged, so that water in surrounding rocks at the bottom of the inverted arch can be effectively drained along the drainage channel of the inverted arch, the high water pressure at the bottom of the inverted arch is released, the effect of external buoyancy on the inverted arch is reduced, and the anti-bottom-bulging capability of the inverted arch structure is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a left side view of the first embodiment of the present invention;
FIG. 3 is a top view of a first embodiment of the present invention;
FIG. 4 is a right side view of a first inverted arch segment according to a first embodiment of the present invention;
FIG. 5 is a schematic structural view of a diamond-shaped steel grating according to a first embodiment of the present invention;
FIG. 6 is a cross-sectional view of a tunnel according to a second embodiment of the present invention;
the method comprises the following steps of 1, tunnel primary support, 2, arch wall secondary lining, 3, a leveling layer, 4, a base cushion layer, 5, a waterproof layer, 6, a diamond-shaped grid, 7, a cushion block, 8, a water drainage channel, 9, a steel bar joint, 10, a steel bar joint, 11, a tunnel ditch and a cable trough, 12, a bolt, 13, second inverted arch blocking, 14 and first inverted arch blocking.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected directly or indirectly through an intermediate medium, or the two components can be connected internally or in an interaction relationship, and the terms can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
the present invention is described in detail below with reference to fig. 1 to 5, and specifically, the structure is as follows:
the embodiment provides a prefabricated pin-connected panel tunnel invert structure of anti pucking, including first invert piecemeal 14, second invert piecemeal 13, rhombus grid 6, wherein, first invert piecemeal 14 and second invert piecemeal 13 symmetry installation, and rhombus grid 6 connects between first invert piecemeal 14, second invert piecemeal 13. After the first inverted arch sub-block 14 and the second inverted arch sub-block 13 are installed, a transverse inverted arch structural unit is formed by pouring concrete, and the multiple inverted arch structural units are longitudinally and sequentially spliced to form an integral assembly type inverted arch structure.
When the first inverted arch sub-block 14 and the second inverted arch sub-block 13 are installed, the first inverted arch sub-block 14 and the second inverted arch sub-block 13 are connected with the secondary lining 2 of the arch wall, a reinforcing steel bar joint 9 is reserved at the installation end of the first inverted arch sub-block 14, the second inverted arch sub-block 13 and the secondary lining 2 of the arch wall, and a reinforcing steel bar joint 10 is reserved on one side, opposite to the first inverted arch sub-block 14 and the second inverted arch sub-block 13, of each inverted arch sub-block. The rigidity of the structure is increased by using the steel bar connection, and the deformation resistance is enhanced.
The rhombic grids 6 are connected with the first inverted arch sub-block 14 and the second inverted arch sub-block 13 through the cushion blocks 7. In this embodiment, the spacer 7 is a steel spacer. The rhombic grating 6 comprises four supporting rods, the adjacent supporting rods are connected end to form four connecting points, and the supporting rods are connected through bolts 12. After the inverted arch blocks are installed, the upper diagonal and the lower diagonal of the rhombic grating 6 are connected through bolts 12. In this embodiment, the struts are steel rods.
The rhombus grid 6 is formed into two parts which are bilaterally symmetrical by the supporting rods, when the inverted arch structure bears larger upward buoyancy, the bottom connecting point of the bottom of the rhombus grid 6 moves upwards under the action of the upward buoyancy, and the left connecting point and the right connecting point are forced to move leftwards and rightwards respectively, so that the upper end of the rhombus grid 6 tends to move downwards, the bottom drum at the uppermost position in the middle of the inverted arch filling is protected, the top tensile stress is reduced, and the development of tensile cracks at the position is reduced.
When the first inverted arch block 14 and the second inverted arch block 13 are prefabricated, a grouting hole and a water drainage channel 8 are reserved, one end of the water drainage channel 8 enters surrounding rock, and water is drained from the other end of the water drainage channel, so that underground water can be drained in time, and the pressure of a base is reduced. The drainage channel 8 has a slight downward slope to prevent water from flowing backwards into the surrounding rock.
A waterproof layer 5 is arranged below the inverted arch structure unit to prevent the strength of the inverted arch structure from being reduced due to seepage of underground water into the inverted arch. And post-pouring concrete between the first inverted arch sub-block 14 and the second inverted arch sub-block 13 to form a wet joint concrete post-pouring belt.
The construction method of the inverted arch structure comprises the following steps:
A. and (3) excavating the tunnel and constructing a primary tunnel support 1.
B. After the construction of the tunnel primary support 1 is finished, the inverted arch is excavated, leveled and subjected to basement treatment, the inverted arch blocks are prefabricated from the outside of the tunnel and then transported to the position to be installed in the tunnel through equipment, the first inverted arch block 14 (positioned on the left side) is placed at first, and then the second inverted arch block 13 (positioned on the right side) is placed.
C. After the first inverted arch sub-block 14 and the second inverted arch sub-block 13 are assembled in place, firstly, the rhombic grids 6 between the two sub-blocks are connected through the bolts 12, and after the inverted arch sub-blocks are installed, the upper diagonal and the lower diagonal of the rhombic grids 6 are connected through the bolts 12. And then, the first inverted arch sub-block 14 and the second inverted arch sub-block 13 are fixedly connected with a steel frame of the tunnel primary support 1, so that the tunnel primary support 1, the first inverted arch sub-block 14 and the second inverted arch sub-block 13 jointly form a more stable and reliable closed stress system.
D. And the reinforcing steel bar joints 9 are reserved on two sides of the first inverted arch block 14 and the second inverted arch block 13, and are connected with the reinforcing steel bars of the cast-in-place arch wall secondary lining 2 in the later period to ensure that lining reinforcing steel bars form a closed loop, then the arch wall lining concrete is poured, and the lining structure is closed.
E. After the first inverted arch sub-block 14 and the second inverted arch sub-block 13 are assembled, concrete is poured to fill the part between the two sub-blocks, the integrity of the tunnel inverted arch is improved, and the leveling layer 3 is filled until the bottom of the ballast bed has the condition of constructing the ballast bed.
F. The first inverted arch sub-block 14 and the second inverted arch sub-block 13 are assembled in place and are stressed stably, and grouting is performed to the bottom through grouting holes reserved in the first inverted arch sub-block 14 and the second inverted arch sub-block 13 subsequently, so that the inverted arch precast block is filled compactly.
G. And D, repeating the steps A-F, and assembling the next prefabricated block.
Example two:
the embodiment provides an assembled tunnel, as shown in fig. 6, which includes a tunnel primary support 1, an arch wall secondary lining 2 and the inverted arch structure of the prefabricated assembled tunnel described in the first embodiment, wherein the outer ends of the first inverted arch segment 14 and the second inverted arch segment 13 are located inside the tunnel primary support 1 and are connected with the arch wall secondary lining 2. The tenon-and-mortise structures are arranged at the joint surfaces of the first inverted arch sub-block 14, the second inverted arch sub-block 13 and the arch wall secondary lining 2, so that the inverted arch sub-blocks and the arch wall secondary lining 2 are connected more tightly.
A base cushion layer 4 is arranged below the assembled tunnel inverted arch structure, namely the base cushion layer 4 is positioned below the waterproof layer 5. The inner side of the arch wall secondary lining 2 is provided with a tunnel ditch and a cable trough 11.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The prefabricated assembled tunnel inverted arch structure is characterized by comprising a first inverted arch block and a second inverted arch block which are symmetrically arranged, wherein a rhombic grid is connected between the first inverted arch block and the second inverted arch block; first inverted arch piecemeal, second inverted arch piecemeal form inverted arch constitutional unit through concreting, and multisection inverted arch constitutional unit vertically splices in proper order and constitutes whole assembled inverted arch structure.
2. The anti-bottom-bulging prefabricated assembled tunnel inverted arch structure according to claim 1, wherein the diamond-shaped grating is connected with the first inverted arch sub-block and the second inverted arch sub-block through cushion blocks respectively, and comprises four supporting rods which are connected end to end in a rotating mode.
3. The anti-drumming prefabricated assembly type tunnel inverted arch structure of claim 2, wherein the adjacent struts are connected by bolts.
4. The anti-bulging prefabricated assembly type tunnel inverted arch structure of claim 1, wherein the first inverted arch sub-block and the second inverted arch sub-block are used for connecting one end of the secondary lining and are respectively provided with a steel bar joint, and the opposite sides of the first inverted arch sub-block and the second inverted arch sub-block are respectively provided with a steel bar joint.
5. The anti-drumming prefabricated assembled tunnel inverted arch structure as claimed in claim 1, wherein the first inverted arch sub-block and the second inverted arch sub-block are provided with a plurality of drainage channels.
6. The anti-drumming prefabricated assembly type tunnel inverted arch structure as set forth in claim 5, wherein the drainage passage has a downward slope.
7. The fabricated tunnel of claim 1, wherein a waterproof layer is provided under the inverted arch structure unit.
8. An assembled tunnel, comprising a prefabricated assembled tunnel inverted arch structure resisting a bottom heave according to any one of claims 1 to 7, wherein the outer ends of the first inverted arch segment and the second inverted arch segment are positioned on the inner side of a primary support of the tunnel and are connected with an arch wall secondary lining, and tenon-and-mortise structures are arranged at the connection surfaces of the first inverted arch segment and the second inverted arch segment with the arch wall secondary lining.
9. The fabricated tunnel of claim 8, wherein a base cushion is disposed under the inverted arch structure of the assembled tunnel.
10. The construction method of the anti-drumming prefabricated assembly type tunnel inverted arch structure according to any one of claims 1 to 7, comprising the steps of:
A. excavating the tunnel and constructing primary tunnel support;
B. excavating an inverted arch, leveling and carrying out substrate treatment, transporting the prefabricated first inverted arch block and the prefabricated second inverted arch block to a position to be installed, placing the first inverted arch block firstly, and then placing the second inverted arch block;
C. after the inverted arch sub-blocks are assembled in place, connecting the rhombic grids between the first inverted arch sub-block and the second inverted arch sub-block through bolts, and then connecting and fixing the inverted arch sub-blocks and the primary support of the tunnel;
D. steel bar joints are reserved on two sides of the first inverted arch block and the second inverted arch block and are connected with steel bars of a cast-in-place arch wall secondary lining; pouring arch wall lining concrete again, and closing a lining structure;
E. pouring concrete between the first inverted arch block and the second inverted arch block, and filling a leveling layer;
F. grouting to the bottom through grouting holes reserved in the first inverted arch block and the second inverted arch block;
G. and D, repeating the steps A-F to assemble the next inverted arch structure unit.
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| CN202010005704.3A CN111156030A (en) | 2020-01-03 | 2020-01-03 | Anti-bottom-bulging prefabricated assembled tunnel inverted arch structure, assembled tunnel and method |
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| CN202010005704.3A CN111156030A (en) | 2020-01-03 | 2020-01-03 | Anti-bottom-bulging prefabricated assembled tunnel inverted arch structure, assembled tunnel and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691897A (en) * | 2020-05-20 | 2020-09-22 | 济南市市政工程设计研究院（集团）有限责任公司 | Inverted arch segment, tunnel inverted arch structure and secondary lining construction method |
| CN112696212A (en) * | 2020-12-31 | 2021-04-23 | 中铁二院工程集团有限责任公司 | Compressible tunnel bottom structure for inhibiting tunnel bottom bulging and construction method |
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| CN106593469A (en) * | 2016-12-02 | 2017-04-26 | 中铁五局集团第工程有限责任公司 | Trolley for construction of inverted arch |
| CN107387117A (en) * | 2017-07-07 | 2017-11-24 | 中国铁道科学研究院铁道建筑研究所 | A kind of prefabricated assembled tunnel structure in tunnel bottom and its construction method |
| CN207568626U (en) * | 2017-08-29 | 2018-07-03 | 中铁第一勘察设计院集团有限公司 | A kind of tunnel structure for expansive stratum |
| CN109578018A (en) * | 2019-01-22 | 2019-04-05 | 青岛理工大学 | A kind of tunnel inverted arch structure of anti-pucking |
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| CN111691897A (en) * | 2020-05-20 | 2020-09-22 | 济南市市政工程设计研究院（集团）有限责任公司 | Inverted arch segment, tunnel inverted arch structure and secondary lining construction method |
| CN111691897B (en) * | 2020-05-20 | 2022-02-08 | 济南市市政工程设计研究院（集团）有限责任公司 | Inverted arch segment, tunnel inverted arch structure and secondary lining construction method |
| CN112696212A (en) * | 2020-12-31 | 2021-04-23 | 中铁二院工程集团有限责任公司 | Compressible tunnel bottom structure for inhibiting tunnel bottom bulging and construction method |
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Application publication date: 20200515 |