CN211524821U - A restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel - Google Patents
A restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel Download PDFInfo
- Publication number
- CN211524821U CN211524821U CN201821623994.2U CN201821623994U CN211524821U CN 211524821 U CN211524821 U CN 211524821U CN 201821623994 U CN201821623994 U CN 201821623994U CN 211524821 U CN211524821 U CN 211524821U
- Authority
- CN
- China
- Prior art keywords
- shell
- restraint
- filling
- tunnel
- arc surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel forms including the concatenation of a plurality of restraint filling type section of jurisdiction monomers along the tunnel hoop. The restraint filling type pipe piece monomer comprises a restraint shell, and a filling body is arranged inside the restraint shell. The outer arc surface side of the restraint shell is in contact with surrounding rocks 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 formed in the outer arc surface of the restraint shell and the inner arc surface at uniform intervals, and the prestressed anchor bolts penetrate through the round holes in the same position on the outer arc surface and the inner arc surface. The prestressed anchor bolt is perpendicular to the surfaces of the inner arc and the outer arc of the constraint shell, and can generate radial extrusion on the constraint shell and the inner filling body by applying prestress, so that the prestressed anchor bolt, the constraint shell and the filling body form a composite bearing structure together to resist the pressure action of the surrounding rock of the external tunnel together.
Description
Technical Field
The utility model relates to a tunnel support technical field especially relates to a restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel.
Background
With the continuous promotion of the urbanization process, the number of urban population is increased sharply, so that traffic jam and low efficiency are caused, the healthy development of cities is severely restricted, and urban subways have no substitutable function in urban construction and development due to the huge advantages of the urban subways. The shield method is a main method for urban subway tunnel construction, and the lining segment is a main supporting member in shield construction. The quality of the duct piece is an important premise for guaranteeing the safety of tunnel construction and operation, and the requirement for high-quality duct pieces is very 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, the manufacturing of the reinforced concrete segments needs eight stages of binding, hoisting of reinforcement cages, mold cleaning, pouring, steam curing, demolding and the like, the reinforcement cages mainly depend 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 the quality defect problem is easy to generate. Meanwhile, in the duct piece transportation and operation process, the phenomena of missing edges and corner falling and concrete cracking and damage are easy to occur in the conventional reinforced concrete duct piece, the bearing strength of the duct piece is weakened, and the stable control requirement of the subway tunnel in the construction and operation processes is even difficult to meet.
SUMMERY OF THE UTILITY MODEL
Easy production fracture that appears to conventional reinforced concrete section of jurisdiction destroys, reinforcement pouring technology is complicated and intensity of labour is big, the section of jurisdiction quality is difficult to accurate control scheduling problem, the utility model provides a restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel can effectively avoid the section of jurisdiction fracture to destroy, improves the section of jurisdiction and bears intensity, reduces section of jurisdiction production preparation intensity of labour, and lift pipe piece production quality still has and reduces section of jurisdiction weight, avoids advantages such as section of jurisdiction corruption, environmental protection high efficiency.
In order to achieve the above purpose, the specific technical solution of the present invention is as follows:
a restraint filling type segment lining supporting structure for a shield tunnel comprises a plurality of restraint filling type segment monomers which are arranged along the circumferential direction of the tunnel, and adjacent restraint filling type segment monomers are spliced and connected; each constraint filling type pipe piece monomer comprises a constraint shell, and a filling body is arranged in the constraint shell; the outer arc surface side of the restraint shell is contacted with surrounding rocks 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 arranged on the outer arc surface and the inner arc surface of the restraint shell at intervals, and prestressed anchor bolts penetrate through the round holes in the same position on the outer arc surface and the inner arc surface; the prestressed anchor bolt is perpendicular to the surfaces of the inner arc and the outer arc of the constraint shell, and can radially extrude the constraint shell and the inner filling body by applying prestress, so that the prestressed anchor bolt, the constraint shell and the filling body form a composite bearing structure together to resist the pressure action of the surrounding rock of the external tunnel together.
Furthermore, the prestressed anchor bolt rod body located at the central part of the outer arc surface and the inner arc surface of each constraint shell is hollow, after splicing of a plurality of constraint filling type segment monomers on site is completed, segment lining wall post-grouting is carried out by the prestressed anchor bolt at the central part, gaps between the segment outer arc surface and the tunnel surrounding rock surface are filled, the surrounding rock pressure acting on the segment lining outer arc surface is more uniform, and the stress concentration phenomenon is avoided.
Furthermore, the hollow prestressed bolt rod body is provided with a grout stop valve close to the end part of the inner arc surface side of the restraint shell, grouting can be carried out through the outer end part of the prestressed anchor bolt at the central part when the grout stop valve is opened, and the grouting can be closed after grouting is finished on the lining wall of the duct piece, so that the phenomenon of outflow of grouting grout is avoided.
Furthermore, the material of the constraint shell and the prestressed anchor bolt body includes but is not limited to GFRP material and steel material.
Furthermore, the filling body is manufactured by filling and pouring in the constraint shell, and the filling body material includes but is not limited to concrete, gravel and cement slurry filling body.
Furthermore, the manufacturing method of the constraint shell comprises but is not limited to the methods of direct pouring molding of a mold, welding and assembling, and mechanical connection and assembling.
Furthermore, the splicing mode of the plurality of constrained filling type segment monomers includes but is not limited to bolt connection, bolt connection and tenon connection, and the segment monomers are provided with water stops at the joint of the annular splicing and the axial splicing of the tunnel.
Furthermore, an opening is arranged on the surface side of one end part of the restraint shell along the tunnel ring or the surface side of one end part of the restraint shell along the tunnel shaft; the opening is fitted with a sealing cap.
The utility model also provides a concrete processing and mounting process that is used for the restraint of shield tunnel to fill type segment lining supporting construction, including following step:
step 1: processing and manufacturing a segment single body restraint shell according to the section size of the tunnel and the support design requirement, and performing opening treatment on the surface side of one end part along the circumferential direction of the tunnel or the surface side of one end part along the axial direction of the tunnel;
step 2: mounting a prestressed anchor bolt along the circular hole part at the same position of the outer arc surface and the inner arc surface of the constraint shell, and performing primary pre-tightening;
and step 3: filling the inside of the opening part at one side of the restraint shell in the step 1 by using a filling material to form a filling body;
and 4, step 4: after the filling body in the constraint shell is solidified, performing surface-wiping leveling treatment on the opening side of the constraint shell, and closing the side opening by using a sealing cover made of the same constraint shell material;
and 5: carrying out secondary pre-tightening on the prestressed anchor bolt to enable the prestressed anchor bolt to generate effective radial extrusion on the constraint shell and the internal filling body;
step 6: repeating the steps 1-5 to complete the manufacture of a plurality of constrained filling type segment monomers;
and 7: moving the plurality of completely manufactured segment monomers to an engineering site, and splicing to form a tunnel constraint filling type segment lining structure after a tunnel is excavated;
and 8: performing post-grouting on the lining wall of the duct piece by using prestressed anchor bolts at the central parts of the surfaces of the outer arc and the inner arc of the constrained filling type duct piece monomer;
and step 9: after the slip casting was accomplished, the prestressed anchorage who closes central point tied and only starched valve, was accomplished the utility model discloses the execution of this kind of tunnel restraint filling type segment lining structure is done.
The utility model has the advantages that:
1) the utility model discloses this kind of section of jurisdiction surface is the restraint shell, and restraint shell material has higher tensile strength for materials such as steel or GFRP, can carry out the cuff restraint to the internal filling body, effectively solves the fracture destruction scheduling problem that conventional reinforced concrete section of jurisdiction easily appears.
2) The utility model utilizes the restraint shell and the filling body, can give full play to the mechanical property advantages of the tension resistance of the restraint shell and the compression resistance of the filling body, and realizes the symbiosis of the two forces; meanwhile, by means of the prestressed anchor bolt and the prestress applied, the constraint shell and the filling body can be radially extruded, and the three parts can form a composite bearing whole. Compared with the conventional reinforced concrete segment, the bearing strength of the segment lining can be further improved.
3) The utility model discloses but restraint shell and prestressed anchorage bolt mass direct production, but each partial component size specification of strict control, when carrying out this section of jurisdiction production preparation, only need to assemble and to pour after the installation, can solve that the intensity of labour that artifical ligature steel reinforcement cage of conventional reinforced concrete section of jurisdiction production manufacture process arouses is big, the loaded down with trivial details technology, reinforcing bar preparation and ligature precision are difficult to not enough such as accurate control, still can avoid conventional reinforced concrete section of jurisdiction to need the mould to pour the scheduling problem, can effectively reduce workman intensity of labour, riser piece production quality.
4) The utility model discloses the obturator can directly utilize tunnel excavation slabstone material to make. Specifically, for example, can directly make in the inside mode of adopting "once filling tunnel excavation slabstone, the secondary cement thick liquid of restraint shell and filling and annotating solidification", can realize the reutilization of tunnel excavation slabstone, high-efficient environmental protection still can reduce and strut material cost.
5) The utility model discloses when this kind of section of jurisdiction constraining shell material is GFRP material, can effectively reduce the whole weight of section of jurisdiction, practice thrift section of jurisdiction transportation and installation cost, reduce workman intensity of labour consumption, still can effectively avoid section of jurisdiction corrosion phenomena.
Drawings
The following detailed description of the embodiments of the present invention will be provided in conjunction with the accompanying drawings, which are included to explain the exemplary embodiments of the present invention and the description thereof, and are not intended to limit the present invention.
FIG. 1 is a schematic cross-sectional structure diagram of a tunnel constrained-filling type segment lining structure after splicing is completed in the embodiment of the present invention;
FIG. 2 is a schematic structural view of section A-A in FIG. 1;
FIG. 3 is an enlarged partial view of the prestressed anchorage bolt at 4(B) in FIG. 1;
FIG. 4 is an enlarged partial view of the prestressed anchorage bolt at 4(C) in FIG. 1;
wherein: 1-restraining a filling type segment monomer; 2-a constraining shell; 3-a filling body; 4-prestressed anchor bolt; 5-stop valve.
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 "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, unless the context clearly indicates otherwise.
Just as the background art introduces, the easy production fracture that conventional reinforced concrete section of jurisdiction appears destroys, the reinforcement is built that the technology is complicated and intensity of labour is big, the section of jurisdiction quality is difficult to accurate control scheduling problem, the utility model provides a restraint filling type section of jurisdiction lining cutting supporting construction and technology for shield tunnel can effectively avoid the section of jurisdiction fracture to destroy, improves section of jurisdiction bearing strength, reduces section of jurisdiction production preparation intensity of labour, and lift pipe piece production quality still has advantages such as reduction section of jurisdiction weight, avoid section of jurisdiction corruption, environmental protection high efficiency. The present invention will be further explained with reference to the drawings and the embodiments by taking as an example the specific processing and installation process of a GFRP tunnel-constrained filling type segment lining structure capable of applying prestress.
As shown in fig. 1, a tunnel-constrained filling-type segment lining structure made of a prestressed GFRP material comprises a plurality of GFRP material-constrained filling-type segment single bodies 1 arranged along the circumferential direction of a tunnel and spliced together. The GFRP material restricted filling type pipe piece monomer 1 comprises a restricted shell 2, and a filling body 3 is arranged inside the restricted shell 2.
The outer arc surface side of the restraint shell 2 is in contact with surrounding rocks 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 formed in the outer arc surface and the inner arc surface of the restraint shell 2 at uniform intervals, and the prestressed anchor bolts 4 penetrate through the round holes in the same position on the outer arc surface and the inner arc surface. The prestressed anchor bolt 4 is perpendicular to the inner arc surface and the outer arc surface of the constraint shell 2, and can radially extrude the constraint shell 2 and the internal filling body 3 by applying prestress, so that the prestressed anchor bolt 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 together.
The utility model utilizes the restraint shell and the filling body, can give full play to the mechanical property advantages of the tension resistance of the restraint shell and the compression resistance of the filling body, and realizes the symbiosis of the two forces; meanwhile, by means of the prestressed anchor bolt and the prestress applied, the constraint shell and the filling body can be radially extruded, and the three parts can form a composite bearing whole. Compared with the conventional reinforced concrete segment, the bearing strength of the segment lining can be further improved.
The prestressed anchor bolt 4 rod body located at the central part of the outer arc surface and the inner arc surface is hollow, after splicing of a plurality of constrained filling type segment monomers 1 on site is completed, the prestressed anchor bolt 4 at the central part can be utilized for grouting behind the segment lining wall, gaps between the segment outer arc surface and the tunnel surrounding rock surface are filled, the surrounding rock pressure acting on the segment lining outer arc surface is more uniform, and the stress concentration phenomenon is avoided. Specifically, the prestressed anchor bolt body at the position 4(B) in the attached drawing 1 is a hollow structure, and the specific structure of the bolt body is shown in a drawing 3; the prestressed anchor bolt rod body at other positions (for example, 4(C) in FIG. 1) is of a solid structure, and the concrete structure of the rod body is shown in FIG. 4;
furthermore, the material of the restraining shell 2 and the pre-stressed anchor bolt 4 is GFRP material, and in addition, the material of the restraining shell 2 and the pre-stressed anchor bolt 4 can also be steel material and the like. The utility model discloses this kind of section of jurisdiction surface is the restraint shell, and restraint shell material has higher tensile strength for materials such as steel or GFRP, can carry out the cuff restraint to the internal filling body, effectively solves the fracture destruction scheduling problem that conventional reinforced concrete section of jurisdiction easily appears.
Furthermore, the filling body 3 is manufactured by filling and pouring in the constraint shell 2, and the filling body 3 is made of concrete, gravel and cement slurry filling body and the like.
Furthermore, the manufacturing method of the constraint shell 2 is that the mould is directly cast, and if the constraint shell 2 is made of steel, the constraint shell can be manufactured by welding, assembling, mechanical connection and assembly and the like.
Furthermore, the plurality of constrained filling type segment monomers 1 are spliced on site in a bolt connection mode, and can be connected in a bolt connection mode, a tenon connection mode and the like, and water stops are arranged at the joint surfaces of the annular and axial splicing of the segment monomers in the tunnel.
Furthermore, the confined filling type segment monomer 1 outer arc, the prestressed anchor bolt of inner arc surface central part install only thick liquid valve 5 near the inner arc surface side, can carry out the slip casting through the prestressed anchor bolt 4 outer end position of central part when opening only thick liquid valve 5, treat the segment lining wall back slip casting and accomplish the back, can close it, avoid producing the slip casting thick liquid outflow phenomenon.
Furthermore, an opening is arranged on the surface side of one end part of the restraint shell along the tunnel ring or the surface side of one end part of the restraint shell along the tunnel shaft; the opening is fitted with a sealing cap.
The utility model also provides a concrete processing and mounting process that is used for the restraint of shield tunnel to fill type segment lining supporting construction, including following step:
step 1: processing and manufacturing a segment single body restraint shell 2 according to the section size of the tunnel and the support design requirement, and performing opening treatment on the surface side of one end part along the circumferential direction of the tunnel or the surface side of one end part along the axial direction of the tunnel;
step 2: mounting a prestressed anchor bolt 4 along a circular hole part at the same position of the outer arc surface and the inner arc surface of the constraint shell 2, and performing primary pre-tightening;
and step 3: filling the interior of the constraining shell 2 along the opening part at one side in the step 1 by using filling material concrete to form a filling body 3;
and 4, step 4: after the filling body 3 in the restraint shell 2 is solidified, performing plastering and leveling treatment on the opening side of the restraint shell, and closing the side opening by using a sealing cover made of the same material of the restraint shell 2;
and 5: carrying out secondary pre-tightening on the prestressed anchor bolt 4 to enable the prestressed anchor bolt to effectively and radially extrude the constraint shell 2 and the internal filling body 3;
step 6: repeating the steps 1-5 to complete the manufacture of a plurality of constrained filling type segment monomers 1;
and 7: moving the plurality of completely manufactured segment monomers to an engineering site, and splicing to form a tunnel constraint filling type segment lining structure after a tunnel is excavated;
and 8: performing post-grouting on the lining wall of the duct piece by using the prestressed anchor bolts 4 at the central parts of the outer arc surface and the inner arc surface of the constrained filling type duct piece single body 1;
and step 9: after the slip casting was accomplished, closed central point's prestressed anchorage bolt grout stopping valve 5, accomplished the utility model discloses the execution of this kind of tunnel restraint filling type segment lining structure is done.
The constraint shell and the prestressed anchor bolt adopted in the construction process can be directly produced in batches, the size and specification of each part of component can be strictly controlled, when the pipe piece is produced and manufactured, pouring can be carried out only after assembling and mounting, the defects that labor intensity is large, the process is complicated, steel bar manufacturing and binding precision is difficult to accurately control and the like caused by manual binding of a steel bar cage in the production and manufacturing process of the conventional reinforced concrete pipe piece can be overcome, the problems that the conventional reinforced concrete pipe piece needs to be poured by a mold and the like can be further avoided, the labor intensity of workers can be effectively reduced, and the production quality of the lifting pipe piece is improved.
The filling body can be directly manufactured by using a slag stone material for tunnel excavation. Specifically, for example, can directly make in the inside mode of adopting "once filling tunnel excavation slabstone, the secondary cement thick liquid of restraint shell and filling and annotating solidification", can realize the reutilization of tunnel excavation slabstone, high-efficient environmental protection still can reduce and strut material cost.
When above-mentioned section of jurisdiction restraint shell material is GFRP material, can effectively reduce the whole weight of section of jurisdiction, practice thrift section of jurisdiction transportation and installation cost, reduce workman intensity of labour consumption, still can effectively avoid section of jurisdiction corrosion.
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 (8)
1. A restraint filling type segment lining supporting structure for a shield tunnel is characterized by comprising a plurality of restraint filling type segment monomers which are arranged along the circumferential direction of the tunnel, and adjacent restraint filling type segment monomers are spliced and connected; each constraint filling type pipe piece monomer comprises a constraint shell, and a filling body is arranged in the constraint shell; the outer arc surface side of the restraint shell is contacted with surrounding rocks 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 arranged on the outer arc surface and the inner arc surface of the restraint shell at intervals, and prestressed anchor bolts penetrate through the round holes in the same position on the outer arc surface and the inner arc surface; the prestressed anchor bolt is perpendicular to the surfaces of the inner arc and the outer arc of the constraint shell, and can radially extrude the constraint shell and the inner filling body by applying prestress, so that the prestressed anchor bolt, the constraint shell and the filling body form a composite bearing structure together to resist the pressure action of the surrounding rock of the external tunnel together.
2. The restrained filling type segment lining support structure for a shield tunnel according to claim 1, wherein the prestressed anchor bolt bodies located at the central portions of the outer arc and inner arc surfaces of each of the restrained shells are hollow.
3. The restrained filling type segment lining support structure for a shield tunnel according to claim 2, wherein the hollow prestressed bolt shank body is provided with a grout stop valve at an end portion near the inner arc surface side of the restraint shell.
4. The restricted-filling type segment lining support structure for a shield tunnel according to claim 1, wherein the material of the restricted shell and the prestressed anchor bolt rod includes GFRP material and steel material.
5. The confined-fill segment lining support structure for a shield tunnel of claim 1, wherein said filler material comprises concrete, gravel + cement slurry filler.
6. The restrained filling-type segment lining support structure for a shield tunnel according to claim 1, wherein the splicing manner of the plurality of restrained filling-type segment units includes a bolt connection manner, a pin connection manner and a tenon connection manner.
7. The confined-filling segment lining support structure for a shield tunnel according to claim 1, wherein the confined-filling segment single bodies are provided with water stops at circumferential and axial splicing surfaces of the tunnel.
8. The restrained filling-type segment lining support structure for a shield tunnel according to claim 1, wherein an opening is provided in the surface side of one end portion in the circumferential direction of the tunnel or in the axial direction of the tunnel of the restraining shell; the opening is fitted with a sealing cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821623994.2U CN211524821U (en) | 2018-09-30 | 2018-09-30 | A restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821623994.2U CN211524821U (en) | 2018-09-30 | 2018-09-30 | A restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211524821U true CN211524821U (en) | 2020-09-18 |
Family
ID=72438818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821623994.2U Active CN211524821U (en) | 2018-09-30 | 2018-09-30 | A restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211524821U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184736A (en) * | 2018-09-30 | 2019-01-11 | 山东建筑大学 | One kind can apply prestressed tunnel constraint packed type pipe-plate lining structure and technique |
-
2018
- 2018-09-30 CN CN201821623994.2U patent/CN211524821U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184736A (en) * | 2018-09-30 | 2019-01-11 | 山东建筑大学 | One kind can apply prestressed tunnel constraint packed type pipe-plate lining structure and technique |
| CN109184736B (en) * | 2018-09-30 | 2023-09-26 | 山东建筑大学 | Construction process of tunnel constraint filling type duct piece lining structure capable of applying prestress |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109184737B (en) | Tunnel prestress constraint filling lining support system capable of yielding and absorbing energy and process | |
| CN108301561B (en) | Connection structure of assembled steel pipe concrete column shaft | |
| CN211573533U (en) | Tunnel constraint filling type lining structure capable of adapting to large deformation of surrounding rock | |
| CN101831875A (en) | Precast assembly process of prestressed concrete cylindrical hollow pier | |
| CN110387826B (en) | Segment prefabricated and assembled pier steel member and construction method and application thereof | |
| CN111042185B (en) | Construction method of basement raft foundation with tower crane foundation | |
| CN109837831A (en) | A kind of centrifugation prefabricated assembled concrete bridge pier and construction method | |
| CN109488342B (en) | Hoop shell filling type flexible yielding lining for roadway support and construction method | |
| WO2020211175A1 (en) | Fabricated reinforced concrete bridge pier and construction method therefor | |
| CN112853946A (en) | Grouting sleeve, grouting sleeve connected assembled pier and construction method thereof | |
| CN111305869A (en) | Prefabricated lining structure of arch wall and construction method | |
| CN211524821U (en) | A restraint filling type section of jurisdiction lining cutting supporting construction for shield tunnel | |
| CN210948717U (en) | Can follow protective housing formula energy-absorbing supporting construction that tunnel hoop let pressure | |
| CN104972550A (en) | Multilateral mould of site precast concrete pile and manufacturing method of precast concrete pile | |
| CN109083184A (en) | A kind of prefabricated cushion cap of land sectional type and its production and installation method | |
| CN107090841A (en) | Prefabricated cushion cap foundation, transmission tower and its construction method | |
| CN211598677U (en) | External hoop internal injection type rectangular assembly lining for underground engineering | |
| CN209838429U (en) | Back anchor shield constructs lining cutting supporting construction | |
| CN108978699B (en) | Land integral prefabricated bearing platform and production and installation method thereof | |
| CN109184736B (en) | Construction process of tunnel constraint filling type duct piece lining structure capable of applying prestress | |
| CN110205919A (en) | Prefabricated high-strength concrete modular bridge pier structure and its construction method | |
| CN109184734B (en) | Assembled protective shell lining structure for rectangular underground space and construction method | |
| CN113356897B (en) | Assembled structure of shield passageway portal ring beam and construction method | |
| CN210420850U (en) | Prefabricated high-strength concrete combined pier structure | |
| CN209854778U (en) | Post-cast strip support-free structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |