CN109184736B - Construction process of tunnel constraint filling type duct piece lining structure capable of applying prestress - Google Patents
Construction process of tunnel constraint filling type duct piece lining structure capable of applying prestress Download PDFInfo
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- CN109184736B CN109184736B CN201811160161.1A CN201811160161A CN109184736B CN 109184736 B CN109184736 B CN 109184736B CN 201811160161 A CN201811160161 A CN 201811160161A CN 109184736 B CN109184736 B CN 109184736B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008569 process Effects 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 title claims description 16
- 239000000178 monomer Substances 0.000 claims abstract description 31
- 239000011435 rock Substances 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000009471 action Effects 0.000 claims abstract description 3
- 239000011257 shell material Substances 0.000 claims description 84
- 239000000463 material Substances 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000004567 concrete Substances 0.000 claims description 10
- 239000004575 stone Substances 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 230000000452 restraining effect Effects 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 102100040287 GTP cyclohydrolase 1 feedback regulatory protein Human genes 0.000 claims 1
- 101710185324 GTP cyclohydrolase 1 feedback regulatory protein Proteins 0.000 claims 1
- 239000011440 grout Substances 0.000 claims 1
- 238000001125 extrusion Methods 0.000 abstract description 2
- 239000011152 fibreglass Substances 0.000 description 13
- 239000011150 reinforced concrete Substances 0.000 description 13
- 238000009412 basement excavation Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
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- 230000002787 reinforcement Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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Classifications
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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
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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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
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- Engineering & Computer Science (AREA)
- 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)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The application discloses a tunnel constraint filling type duct piece lining structure capable of applying prestress and a process thereof. The constraining and filling type duct piece monomer comprises a constraining shell, and a filling body is arranged inside the constraining shell. The side of the outer arc surface of the constraint shell is contacted with surrounding rock of the tunnel, the side of the inner arc surface faces the inner space of the tunnel, a plurality of round holes at the same position are uniformly arranged on the outer arc surface and the inner arc surface at intervals, and prestress anchor bolts are installed along the round holes at the same positions of the outer arc surface and the inner arc surface in a penetrating way. The prestress anchor bolts are perpendicular to the surfaces of the inner arc and the outer arc of the constraint shell, and are applied with prestress, so that radial extrusion can be generated on the constraint shell and the inner filling body, and the prestress anchor bolts, the constraint shell and the filling body form a composite bearing structure together to resist the pressure action of surrounding rocks of an external tunnel.
Description
Technical Field
The application relates to the technical field of tunnel support, in particular to a tunnel constraint filling type duct piece lining structure capable of applying prestress and a process.
Background
Along with the continuous promotion of the urban process, the population number of the city is increased sharply, so that traffic jam and low efficiency are caused, the healthy development of the city is severely restricted, and the urban subway has irreplaceable functions in urban construction and development due to the great advantages. The shield method is a main method for urban subway tunnel construction, and lining segments are main supporting members in shield construction. The quality of the duct piece is an important precondition for guaranteeing the construction and operation safety of tunnels, and the demand for the duct piece with high quality is extremely large along with the fact that China is in the peak stage of subway construction.
At present, most lining segments adopted in China are reinforced concrete segments, and the reinforced concrete segments are manufactured through eight stages of binding, hoisting a reinforcement cage, cleaning a mould, pouring, steaming, demoulding and the like, wherein the reinforcement cage mainly depends on manual binding of workers, the production process is complex, the precision is low, the labor intensity is high, the quality of the segments is difficult to accurately control, the production efficiency of the segments is low, and quality defects are extremely easy to generate. Meanwhile, in the pipe piece transportation and operation process, the conventional reinforced concrete pipe piece is extremely easy to have the phenomena of corner breakage due to the lack of edges and cracking and damage of concrete, so that the pipe piece bearing strength is weakened, and even the stable control requirement of a subway tunnel in the construction and operation process is difficult to meet.
Disclosure of Invention
Aiming at the problems that the conventional reinforced concrete pipe sheet is easy to crack and damage, the steel bar binding and pouring process is complex, the labor intensity is high, the quality of the pipe sheet is difficult to control accurately and the like, the application provides the tunnel constraint filling type pipe sheet lining structure and the process capable of applying the prestress, which can effectively avoid the pipe sheet cracking and damage, improve the pipe sheet bearing strength, reduce the pipe sheet production and manufacturing labor intensity, improve the pipe sheet production quality, reduce the pipe sheet weight, avoid the pipe sheet corrosion, protect the environment and realize high efficiency.
In order to achieve the above purpose, the specific technical scheme of the application is as follows:
a tunnel constraint filling type duct piece lining structure capable of applying prestress comprises a plurality of constraint filling type duct piece monomers arranged along the circumferential direction of a tunnel, and adjacent constraint filling type duct piece monomers are spliced and connected; each constraint filling type duct piece monomer comprises a constraint shell, and a filling body is arranged in the constraint shell; the side of the outer arc surface of the constraint shell is contacted with surrounding rock of the tunnel, the side of the inner arc surface faces the inner space of the tunnel, a plurality of round holes at the same position are uniformly formed in the outer arc surface of the constraint shell and the inner arc surface at intervals, and prestress anchor bolts are arranged along the round holes at the same positions of the outer arc surface and the inner arc surface in a penetrating manner; the prestress anchor bolts are perpendicular to the surfaces of the inner arc and the outer arc of the constraint shell, and are applied with prestress, so that radial extrusion can be generated on the constraint shell and the inner filling body, and the prestress anchor bolts, the constraint shell and the filling body form a composite bearing structure together to resist the pressure effect of surrounding rocks of an external tunnel.
Further, the prestressed anchor bolts positioned at the central parts of the outer arc surface and the inner arc surface of each constraint shell are hollow, after the on-site splicing of a plurality of constraint filling type duct piece monomers is completed, the prestressed anchor bolts at the central parts can be utilized for grouting after lining the duct piece walls, gaps between the outer arc surfaces of the duct pieces and the surrounding rock surfaces of the tunnels are filled, so that the surrounding rock pressure acting on the outer arc surfaces of the duct piece liners is more uniform, and the phenomenon of stress concentration is avoided.
Furthermore, the hollow prestressed bolt body is provided with a grouting valve at the end part close to the inner arc surface side of the constraint shell, grouting is carried out at the outer end part of the prestressed bolt at the central part when the grouting valve is opened, and after grouting is completed after the lining wall of the duct piece is lined, the hollow prestressed bolt body can be closed, so that the phenomenon of outflow of grouting slurry is avoided.
Further, the constraint shell and the prestressed anchor rod body are made of GFRP materials and steel materials, but are not limited to GFRP materials and steel materials.
Further, the filling body is manufactured by filling and pouring the inside of the constraint shell, and the filling body material comprises, but is not limited to, concrete, crushed stone and cement slurry filling body.
Further, the manufacturing method of the constraint shell includes, but is not limited to, direct casting molding of a mold, welding assembly and mechanical connection assembly.
Further, the splicing mode of the plurality of constraint filling type duct piece monomers comprises but is not limited to a bolt connection mode, a bolt connection mode and a tenon connection mode, and a water stop belt is arranged at the joint of the annular direction and the axial direction of the tunnel.
Further, an opening is arranged on the surface side of the constraint shell along the tunnel ring direction or the surface side of the constraint shell along the tunnel axial direction; the opening mates with a sealing cap.
The application also provides a concrete processing and installing process of the tunnel constraint filling type duct piece lining structure capable of applying the prestress, which comprises the following steps:
step 1: according to the section size of the tunnel and the design requirement of support, processing and manufacturing a duct piece monomer constraint shell, and carrying out opening treatment on the duct piece monomer constraint shell along the surface side of a certain end part of the tunnel in the circumferential direction of the tunnel or along the surface side of a certain end part of the tunnel in the axial direction;
step 2: installing a prestress anchor bolt along the round hole part of the same position of the outer arc surface and the inner arc surface of the constraint shell, and pre-tightening for one time;
step 3: filling the inside of the constraint shell along the opening part at one side of the constraint shell in the step 1 by using a filling material to form a filling body;
step 4: after the filling body in the constraint shell is solidified, plastering and leveling the side of the opening part of the constraint shell, and sealing the opening of the side by using a sealing cover made of the same constraint shell material;
step 5: the pre-stress anchor bolt is pre-tightened for the second time, so that the pre-stress anchor bolt can effectively radially extrude the constraint shell and the internal filling body;
step 6: repeating the steps 1-5 to finish the manufacture of a plurality of constrained filling type duct piece monomers;
step 7: moving the plurality of segment monomers which are well manufactured to an engineering site, and splicing to form a tunnel constraint filling type segment lining structure after a tunnel is excavated;
step 8: grouting after lining the wall of the duct piece by using a prestress anchor bolt for restraining the central part of the outer arc and the inner arc of the filling duct piece monomer;
step 9: after grouting is completed, closing the prestressed anchor bolt grouting stop valve at the central part, and completing the construction of the tunnel constraint filling type segment lining structure.
The beneficial effects of the application are as follows:
1) The surface of the pipe piece is the constraint shell, and the constraint shell is made of steel or GFRP (glass fiber reinforced plastics) and the like, so that the pipe piece has higher tensile strength, can be used for hooping constraint on an internal filling body, and effectively solves the problems of cracking and damage easily occurring in the conventional reinforced concrete pipe piece.
2) The application utilizes the constraint shell and the filling body, can fully exert the mechanical property advantages of the tensile resistance of the constraint shell and the compression resistance of the filling body, and realizes the symbiosis of the two forces; meanwhile, by means of the prestress anchor bolts, prestress is applied, the constraint shell and the filling body can be radially extruded, and the constraint shell, the filling body and the constraint shell can form a composite bearing whole. Compared with the conventional reinforced concrete pipe sheet, the bearing strength of the pipe sheet lining can be further improved.
3) The restraining shell and the prestress anchor bolt adopted by the application can be directly produced in batch, the size specification of each part of the component can be strictly controlled, and the casting can be carried out only after assembly and installation when the production and the manufacture of the segment are carried out, so that the defects of high labor intensity, complex process, difficult precise control of the steel bar manufacture and binding precision and the like caused by manually binding the steel bar cage in the conventional reinforced concrete segment production and manufacture process can be solved, the problems that the conventional reinforced concrete segment needs to be cast by a mould and the like can be avoided, the labor intensity of workers can be effectively reduced, and the segment production quality can be improved.
4) The filling body can be manufactured by directly utilizing tunnel excavation slag stone materials. Specifically, for example, the method of filling tunnel excavation slag stones and secondary cement slurry filling solidification can be directly adopted in the constraint shell, secondary utilization of the tunnel excavation slag stones can be realized, the high-efficiency environment protection is realized, and the cost of supporting materials can be reduced.
5) When the duct piece restraining shell is made of GFRP material, the total weight of the duct piece can be effectively reduced, the transportation and installation cost of the duct piece can be saved, the labor intensity consumption of workers can be reduced, and the corrosion phenomenon of the duct piece can be effectively avoided.
Drawings
The following detailed description of the application is given in connection with the accompanying drawings, which are given by way of illustration of the application and not limitation.
FIG. 1 is a schematic cross-sectional structure diagram of a tunnel constraint filling type segment lining structure after splicing is completed;
FIG. 2 is a schematic view of the structure of section A-A in FIG. 1;
FIG. 3 is a schematic view of a partially enlarged construction of the portion of the prestressed anchor shown at 4 (B) in FIG. 1;
FIG. 4 is a schematic view of a partially enlarged construction of the prestressed anchor site of FIG. 1 at 4 (C);
wherein: 1-restraining filling type duct piece monomers; 2-a containment vessel; 3-filling body; 4-prestress anchor bolts; 5-a slurry stop valve.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. 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 exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As introduced by the background technology, the problems of easy cracking and damage, complex steel bar binding and pouring process, high labor intensity, difficult precise control of segment quality and the like of the conventional reinforced concrete segment are solved. Taking a concrete processing and mounting process of a pre-stressing GFRP material tunnel constraint filling type segment lining structure as an example, the application is further described below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the GFRP material tunnel constraint filling type duct piece lining structure capable of applying prestress comprises a plurality of GFRP material constraint filling type duct piece monomers 1 which are arranged along the tunnel circumferential direction. The GFRP material constraint filling type duct piece monomer 1 comprises a constraint shell 2, and a filling body 3 is arranged in the constraint shell 2.
The outer arc surface side of the constraint shell 2 contacts with surrounding rock of the tunnel, the inner arc surface side faces the inner space of the tunnel, a plurality of round holes in the same position are uniformly formed in the outer arc surface and the inner arc surface of the constraint shell 2 at intervals, and the pre-stress anchor bolts 4 are installed along the round holes in the same positions of the outer arc surface and the inner arc surface in a penetrating mode. The prestress anchor bolts 4 are perpendicular to the inner arc surface and the outer arc surface of the constraint shell 2, prestress is applied to the prestress anchor bolts, the constraint shell 2 and the inner filling body 3 can be radially extruded, and the prestress anchor bolts 4, the constraint shell 2 and the filling body 3 form a composite bearing structure together to resist the pressure action of surrounding rocks of an external tunnel.
The application utilizes the constraint shell and the filling body, can fully exert the mechanical property advantages of the tensile resistance of the constraint shell and the compression resistance of the filling body, and realizes the symbiosis of the two forces; meanwhile, by means of the prestress anchor bolts, prestress is applied, the constraint shell and the filling body can be radially extruded, and the constraint shell, the filling body and the constraint shell can form a composite bearing whole. Compared with the conventional reinforced concrete pipe sheet, the bearing strength of the pipe sheet lining can be further improved.
The body of the pre-stress anchor bolts 4 positioned at the central parts of the outer arc surface and the inner arc surface is hollow, after the splicing of the plurality of constraint filling type duct piece monomers 1 is completed on site, the pre-stress anchor bolts 4 at the central parts can be utilized to perform grouting after the lining wall of the duct piece, and gaps between the outer arc surface of the duct piece and the surrounding rock surface of a tunnel are filled, so that the surrounding rock pressure acting on the outer arc surface of the duct piece lining is more uniform, and the phenomenon of stress concentration is avoided. The concrete structure of the prestressed anchor bolt body shown in the 4 (B) of the figure 1 is shown in the figure 3; the body of the prestressed anchor bolt at other positions (for example, at 4 (C) in fig. 1) is of a solid structure, and the concrete structure of the body is shown in fig. 4;
furthermore, the materials of the constraint shell 2 and the pre-stress anchor bolt 4 are GFRP materials, and besides, the materials of the constraint shell 2 and the pre-stress anchor bolt 4 can be steel materials. The surface of the pipe piece is the constraint shell, and the constraint shell is made of steel or GFRP (glass fiber reinforced plastics) and the like, so that the pipe piece has higher tensile strength, can be used for hooping constraint on an internal filling body, and effectively solves the problems of cracking and damage easily occurring in the conventional reinforced concrete pipe piece.
Further, the filler 3 is manufactured by filling and pouring the inside of the constraint shell 2, and the filler 3 is made of concrete, or may be crushed stone, cement slurry filler or the like.
Furthermore, the manufacturing mode of the constraint shell 2 is that a die is directly poured and formed, and if the constraint shell 2 is made of steel, the constraint shell can be manufactured through welding assembly, mechanical connection assembly and other modes.
Furthermore, the on-site splicing mode of the plurality of constraint filling type duct piece monomers 1 is bolt connection, the duct piece monomers can be connected through bolt connection, tenon connection and the like, and a water stop belt is arranged at the joint of the circumferential direction and the axial direction of the tunnel.
Furthermore, the prestressed anchor bolts of the central parts of the outer arc and inner arc surfaces of the constrained filling type duct piece monomer 1 are provided with a grouting stop valve 5 close to the side of the inner arc surface, grouting is carried out at the outer end part of the prestressed anchor bolt 4 of the central part when the grouting stop valve 5 is opened, and after grouting is completed after the duct piece lining wall, the duct piece lining wall is closed, so that grouting slurry outflow phenomenon is avoided.
Further, an opening is arranged on the surface side of the constraint shell along the tunnel ring direction or the surface side of the constraint shell along the tunnel axial direction; the opening mates with a sealing cap.
The application also provides a concrete processing and installing process of the tunnel constraint filling type duct piece lining structure capable of applying the prestress, which comprises the following steps:
step 1: according to the section size of the tunnel and the design requirement of support, processing and manufacturing a duct piece monomer constraint shell 2, and carrying out opening treatment on the surface side of a certain end part along the tunnel ring direction or the surface side of a certain end part along the tunnel axial direction;
step 2: installing a pre-stress anchor bolt 4 along the round hole part of the same position of the outer arc surface and the inner arc surface of the constraint shell 2, and pre-tightening for one time;
step 3: filling the inside of the constraint shell 2 along the opening part at one side of the constraint shell by using filling material concrete to form a filling body 3;
step 4: after the filling body 3 in the constraint shell 2 is solidified, the side of the opening part of the filling body is subjected to plastering and leveling treatment, and the opening of the side is closed by a sealing cover made of the same constraint shell 2 material;
step 5: the pre-stress anchor bolt 4 is pre-tightened for the second time, so that the pre-stress anchor bolt can effectively radially extrude the constraint shell 2 and the inner filling body 3;
step 6: repeating the steps 1-5 to finish the manufacture of a plurality of constrained filling type duct piece monomers 1;
step 7: moving the plurality of segment monomers which are well manufactured to an engineering site, and splicing to form a tunnel constraint filling type segment lining structure after a tunnel is excavated;
step 8: grouting after lining the wall of the duct piece by using a prestress anchor bolt 4 at the center part of the outer arc and the inner arc of the constrained filling duct piece monomer 1;
step 9: after grouting is completed, the prestressed anchor bolt grouting valve 5 at the central part is closed, and the construction of the tunnel constraint filling type segment lining structure is completed.
The restraining shell and the prestress anchor bolt adopted in the construction process can be directly produced in batches, the size specification of each part of the component can be strictly controlled, when the duct piece is produced and manufactured, the duct piece can be poured only after assembly and installation, the defects that the labor intensity is high, the process is complex, the steel bar manufacturing and binding precision are difficult to accurately control and the like caused by manual binding of the steel bar cage in the conventional reinforced concrete duct piece production and manufacturing process can be solved, the problems that the conventional reinforced concrete duct piece needs to be poured by a mould and the like can be avoided, the labor intensity of workers can be effectively reduced, and the production quality of the duct piece is improved.
The filling body can be manufactured by directly utilizing tunnel excavation slag stone materials. Specifically, for example, the method of filling tunnel excavation slag stones and secondary cement slurry filling solidification can be directly adopted in the constraint shell, secondary utilization of the tunnel excavation slag stones can be realized, the high-efficiency environment protection is realized, and the cost of supporting materials can be reduced.
When the duct piece restraining shell is made of GFRP material, the total weight of the duct piece can be effectively reduced, the transportation and installation cost of the duct piece is saved, the labor intensity consumption of workers is reduced, and the duct piece corrosion phenomenon can be effectively avoided.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (6)
1. A construction process of a tunnel constraint filling type segment lining structure capable of applying prestress is characterized in that,
the tunnel constraint filling type duct piece lining structure capable of applying prestress comprises a plurality of constraint filling type duct piece monomers arranged along the circumferential direction of the tunnel, and the adjacent constraint filling type duct piece monomers are spliced and connected; each constraint filling type duct piece monomer comprises a constraint shell, and a filling body is arranged in the constraint shell; the side of the outer arc surface of the constraint shell is contacted with surrounding rock of the tunnel, the side of the inner arc surface faces the inner space of the tunnel, a plurality of round holes at the same position are uniformly formed in the outer arc surface of the constraint shell and the inner arc surface at intervals, and prestress anchor bolts are arranged along the round holes at the same positions of the outer arc surface and the inner arc surface in a penetrating manner; the prestress anchor bolts are perpendicular to the surfaces of the inner arc and the outer arc of the constraint shell, and prestress is applied to the prestress anchor bolts, the constraint shell and the filling body, so that the prestress anchor bolts, the constraint shell and the filling body form a composite bearing structure together to resist the pressure action of surrounding rocks of an external tunnel; the constraint shell and the prestress anchor bolt body are made of GFRP materials and steel materials; the filler material comprises concrete, broken stone and cement slurry filler;
the construction process of the lining structure comprises the following steps:
step 1: according to the section size of the tunnel and the design requirement of support, processing and manufacturing a duct piece monomer constraint shell, and carrying out opening treatment on the duct piece monomer constraint shell along the surface side of a certain end part of the tunnel in the circumferential direction of the tunnel or along the surface side of a certain end part of the tunnel in the axial direction;
step 2: installing a prestress anchor bolt along the round hole part of the same position of the outer arc surface and the inner arc surface of the constraint shell, and pre-tightening for one time;
step 3: filling the inside of the constraint shell along the opening part at one side of the constraint shell in the step 1 by using a filling material to form a filling body;
step 4: after the filling body in the constraint shell is solidified, plastering and leveling the side of the opening part of the constraint shell, and sealing the opening of the side by using a sealing cover made of the same constraint shell material;
step 5: the pre-stress anchor bolt is pre-tightened for the second time, so that the pre-stress anchor bolt can effectively radially extrude the constraint shell and the internal filling body;
step 6: repeating the steps 1-5 to finish the manufacture of a plurality of constrained filling type duct piece monomers;
step 7: moving the plurality of segment monomers which are well manufactured to an engineering site, and splicing to form a tunnel constraint filling type segment lining structure after a tunnel is excavated;
step 8: grouting after lining the wall of the pipe piece by using a prestress anchor bolt for restraining the central parts of the outer arc and the inner arc surfaces of the filling pipe piece, filling gaps between the outer arc surfaces of the pipe piece and the surrounding rock surfaces of the tunnel, enabling the surrounding rock pressure acting on the outer arc surfaces of the pipe piece lining to be more uniform, and avoiding the phenomenon of stress concentration;
step 9: and after grouting is completed, closing the prestressed anchor bolt grouting stop valve at the central part to complete the construction of the tunnel constraint filling type segment lining structure.
2. The process for constructing a tunnel-constraining filled type tube lining structure capable of applying prestress according to claim 1, wherein the body of the prestress anchor bolt located at the central portion of the outer arc and the inner arc surfaces of each constraining shell is hollow.
3. The process for constructing a tunnel-constraining filled duct piece lining structure capable of applying prestress as claimed in claim 2, wherein the hollow-shaped prestress anchor rod body is provided with a grout stop valve at an end portion of the inner arc surface side of the constraining vessel.
4. The process for constructing a pre-stressed tunnel-constrained-filled duct piece lining structure of claim 1, wherein the splicing means of the plurality of constrained-filled duct piece monomers comprises a bolting means, a latch means and a tenon means.
5. The process for constructing a pre-stressed tunnel-constrained-filling type segment lining structure according to claim 1, wherein the constrained-filling type segment monomers are provided with water stops at the joint of the circumferential direction and the axial direction of the tunnel.
6. The process for constructing a tunnel-constrained-filling type duct piece lining structure capable of applying prestress according to claim 1, wherein the manufacturing mode of the constraint shell comprises the modes of direct casting molding by a mold, welding assembly and mechanical connection assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811160161.1A CN109184736B (en) | 2018-09-30 | 2018-09-30 | Construction process of tunnel constraint filling type duct piece lining structure capable of applying prestress |
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| CN201811160161.1A CN109184736B (en) | 2018-09-30 | 2018-09-30 | Construction process of tunnel constraint filling type duct piece lining structure capable of applying prestress |
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| CN109184736B true CN109184736B (en) | 2023-09-26 |
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| CN211524821U (en) * | 2018-09-30 | 2020-09-18 | 山东建筑大学 | A restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel |
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| CN109184736A (en) | 2019-01-11 |
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