CN113073995B - Self-resetting prestressed pipe piece structure and assembling method thereof - Google Patents
Self-resetting prestressed pipe piece structure and assembling method thereof Download PDFInfo
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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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
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Abstract
The invention discloses a self-resetting prestressed pipe piece structure and an assembling method thereof, wherein the self-resetting prestressed pipe piece structure comprises the following steps: the self-resetting prestressed pipe piece, the first reserved pipelines, the second reserved pipelines and the prestressed connecting assembly are arranged in the self-resetting prestressed pipe piece, the prestressed connecting assembly penetrates through the first reserved pipelines and the second reserved pipelines in the assembling process of the self-resetting prestressed pipe piece, and anchoring and prestressed tensioning are carried out through the prestressed anchoring assembly and the prestressed tensioning assembly. This application section of jurisdiction simple structure, easily preparation, convenient to use, through to the prestressing force coupling assembling that alternates in first reservation pipeline and the second reservation pipeline anchor and prestressing force stretch-draw, before prestressing force section of jurisdiction structure receives the external force loading effect, artificial production prestressing force earlier, under meeting with earthquake or huge external force effect, can offset the stretch-draw deformation of section of jurisdiction seam crossing, improve shield tunnel structure's annular toughness.
Description
Technical Field
The invention relates to the technical field of shield tunnels of urban subways, in particular to a self-resetting prestressed pipe piece structure and an assembling method thereof.
Background
Along with the continuous development of urban subway tunnel construction, more and more cities open urban subway lines, the shield method is the more advanced construction method of subway tunnel at present, and the precast concrete section of jurisdiction as tunnel lining is the leading bearing structure of tunnel, and its quality directly influences all aspects performances such as stability, waterproof nature of whole subway tunnel. When an existing shield segment encounters an earthquake or a huge external force, the segment joint is easy to stretch and deform, so that the anti-seismic toughness of the shield tunnel structure is poor.
Thus, there is still a need for improvement and development of the prior art.
Disclosure of Invention
The invention aims to solve the technical problem that the self-resetting prestressed duct piece structure and the assembling method thereof aim to solve the problem that the existing shield duct piece is easy to stretch and deform at a duct piece joint under the action of earthquake or huge external force, so that the shield tunnel structure is poor in anti-seismic toughness.
The technical scheme adopted by the invention for solving the problems is as follows:
in a first aspect, an embodiment of the present invention provides a self-resetting prestressed pipe segment structure, including: the self-resetting prestressed pipe piece comprises a self-resetting prestressed pipe piece, a plurality of first reserved pipelines, a plurality of second reserved pipelines and a prestressed connecting assembly, wherein the first reserved pipelines and the second reserved pipelines are arranged in the self-resetting prestressed pipe piece, and the prestressed connecting assembly penetrates through the first reserved pipelines and the second reserved pipelines in the assembling process of the self-resetting prestressed pipe piece and carries out anchoring and prestressed tensioning through a prestressed anchoring assembly and a prestressed tensioning assembly.
The self-resetting prestressed pipe piece structure is characterized in that the plurality of first reserved pipelines and the plurality of second reserved pipelines are symmetrically arranged at two ends of the self-resetting prestressed pipe piece.
The self-resetting prestressed pipe piece structure is characterized in that one end of each of the first reserved pipelines is arranged on the side face of the self-resetting prestressed pipe piece, and the other end of each of the first reserved pipelines penetrates through the end face of the self-resetting prestressed pipe piece.
The self-resetting prestressed pipe piece structure is characterized in that one end of each of the second reserved pipelines is arranged on the side face of the self-resetting prestressed pipe piece, and the other end of each of the second reserved pipelines penetrates through the end face of the self-resetting prestressed pipe piece.
The self-resetting prestressed pipe piece structure is characterized in that a plurality of first reserved pipelines are provided with lugs at one ends penetrating through the end faces of the self-resetting prestressed pipe pieces, and a plurality of second reserved pipelines are provided with grooves matched with the lugs at one ends penetrating through the end faces of the self-resetting prestressed pipe pieces.
The self-resetting prestressed pipe piece structure is characterized in that the plurality of first reserved pipelines and the plurality of second reserved pipelines are hollow metal corrugated pipes.
The self-resetting prestressed pipe piece structure is characterized in that the number of the first reserved pipelines and the number of the second reserved pipelines are 4N, wherein N is a non-zero natural number.
The self-resetting prestressed pipe piece structure is characterized in that a high-elasticity waterproof rubber pad is arranged on the end face of the self-resetting prestressed pipe piece.
In a second aspect, an embodiment of the present invention provides an assembling method of the self-resetting prestressed pipe segment structure, where the assembling method includes:
the method comprises the steps of obtaining a first self-resetting prestressed pipe piece structure and a second self-resetting prestressed pipe piece structure, and inserting a plurality of first reserved pipelines of the first self-resetting prestressed pipe piece structure into a plurality of second reserved pipelines of the second self-resetting prestressed pipe piece structure to obtain a plurality of connecting pipelines;
inserting a prestress connecting assembly into the connecting pipelines, taking two ends of the prestress connecting assembly as an anchoring end and a tensioning end respectively, and anchoring and pre-stressing tensioning the prestress connecting assembly through the prestress anchoring assembly and the prestress tensioning assembly;
and after the tensioning of the prestress connecting assembly is finished, grouting is carried out on the connecting pipelines so as to realize the assembly of the first self-resetting prestress pipe piece structure and the second self-resetting prestress pipe piece structure.
The assembling method of the self-resetting prestressed pipe piece structure is characterized in that the positions of the tensioning end and the anchoring end of the prestressed connecting assembly in the adjacent connecting pipelines are opposite.
The invention has the beneficial effects that: the self-resetting prestressed pipe piece structure provided by the invention has the advantages that the prestressed connecting components are inserted in the first reserved pipeline and the second reserved pipeline, the prestressed connecting components are anchored and prestressed and tensioned through the prestressed anchoring components and the prestressed tensioning components, the prestressed pipe piece structure artificially generates prestress before being subjected to external force load, and the tensioning deformation of the joint of the pipe piece can be counteracted under the action of earthquake or huge external force, so that the inter-ring toughness of the shield tunnel structure is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a self-resetting prestressed pipe piece structure provided by an embodiment of the invention;
FIG. 2 is a schematic end-plane view of a self-resetting pre-stressed tube sheet structure according to an embodiment of the present invention;
FIG. 3 is a schematic end-face perspective view of a self-resetting pre-stressed tube sheet structure provided in an embodiment of the present invention;
fig. 4 is a schematic end-face perspective structure view of a first reserve pipe provided in an embodiment of the present invention;
fig. 5 is a schematic end-face perspective structure view of a second reserve pipe provided in the embodiment of the present invention;
fig. 6 is a schematic flow chart of an assembly method of a self-resetting prestressed pipe piece structure according to an embodiment of the present invention.
The various symbols in the drawings: 1. self-resetting prestressed pipe pieces; 2. a first reserved pipe; 3. a second reserved pipe; 4. a pre-stressed connection assembly; 5. a pre-stressed anchoring assembly; 6. a pre-stressed tension assembly; 7. a high-elasticity waterproof rubber pad; 21. a bump; 31. and (4) a groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
The precast concrete segment used as a tunnel lining is the most main supporting structure of the tunnel, and the quality of the precast concrete segment directly influences the stability, the waterproofness and other performances of the whole subway tunnel. When an existing shield segment encounters an earthquake or a huge external force, the segment joint is easy to stretch and deform, so that the anti-seismic toughness of the shield tunnel structure is poor.
In order to solve the problem of prior art, this embodiment provides a from prestressing force section of jurisdiction structure that restores to throne, from prestressing force section of jurisdiction structure that restores to throne is applied to subway tunnel, as shown in fig. 1 ~ 4, the section of jurisdiction structure includes: the self-resetting prestressed pipe piece 1, the first reserved pipelines 2, the second reserved pipelines 3 and the prestressed connecting assembly 4 are arranged, the first reserved pipelines 2 and the second reserved pipelines 3 are arranged in the self-resetting prestressed pipe piece 1, the prestressed connecting assembly 4 penetrates the first reserved pipelines 2 and the second reserved pipelines 3 in the assembling process of the self-resetting prestressed pipe piece 1, and the prestressed connecting assembly 4 is anchored and prestressed tensioned through the prestressed anchoring assembly 5 and the prestressed tensioning assembly 6. In the assembling process of the self-resetting prestressed pipe piece structure, for example, two self-resetting prestressed pipe piece structures to be spliced are a standard block and an adjacent block, wherein the standard block and the adjacent block respectively comprise a self-resetting prestressed pipe piece 1, a plurality of first reserved pipelines 2, a plurality of second reserved pipelines 3 and a prestressed connecting assembly 4, after the plurality of first reserved pipelines 2 of the standard block and the plurality of second reserved pipelines 3 of the adjacent block are inserted and spliced, a plurality of connecting pipelines consisting of the plurality of first reserved pipelines 2 of the standard block and the plurality of second reserved pipelines 3 of the adjacent block are obtained, the prestressed connecting assembly 4 is inserted into the plurality of connecting pipelines, two ends of the prestressed connecting assembly 4 are respectively an anchoring end and a tensioning end, the prestressed connecting assembly 4 is anchored and tensioned through a prestressed anchoring assembly 5 and a prestressed tensioning assembly 6, after the prestressed connecting assembly 4 is tensioned, and grouting a plurality of connecting pipelines to realize the assembly of the first self-resetting prestressed pipeline structure and the second prestressed pipeline structure. The prestressing force coupling assembling 4 alternates in first reserved pipeline 2 and second reserved pipeline 3 from restoring to throne prestressing force segment structure in this embodiment to carry out the anchor and prestressing force stretch-draw to prestressing force coupling assembling 4 through prestressing force anchor subassembly 5 and prestressing force stretch-draw subassembly 6, before prestressing force segment structure receives external load effect, artificial production prestressing force in advance, under meeting with earthquake or huge external force effect, can offset the stretch-draw deformation of segment seam crossing, improve shield tunnel structure's inter-ring toughness.
In a specific embodiment, the prestressed connecting assembly 4 is a high-elasticity steel strand or a shape memory alloy, the high-elasticity steel strand and the shape memory alloy have a large deformation recovery capability under the action of an external force, and the prestressed anchoring assembly 5 is an extrusion die and an extrusion sleeve. Taking the prestressed connecting assembly 4 as a high-elasticity steel strand as an example, when the prestressed connecting assembly 4 is anchored by the prestressed anchoring assembly 5, specifically, the steel strand bundle passes through the anchor backing plate, each steel strand bundle is sequentially sleeved with the extrusion sleeve, and then the steel strand bundle and the extrusion sleeve are flattened by the extrusion die, so that the anchoring effect is achieved. The prestress tensioning assembly 6 is a jack and a thrust plate, when the prestress tensioning assembly 6 is used for tensioning the prestress connecting assembly 4, a steel strand bundle specifically penetrates through the anchor backing plate and the thrust plate, then the jack is used for clamping the steel strand and acting on the thrust plate, and tensioning of the prestress connecting assembly 4 is achieved.
Specifically, the shape of the self-restoring prestressed pipe piece 1 may be freely designed according to the shape of the tunnel, for example, when the shape of the tunnel is circular, the shape of the self-restoring prestressed pipe piece 1 is arc. In order to balance the prestress artificially applied to the two ends of the self-resetting prestressed pipe piece 1, a plurality of first reserved pipelines 2 and a plurality of second reserved pipelines 3 are symmetrically arranged at the two ends of the self-resetting prestressed pipe piece 1, as shown in fig. 1, for the arc-shaped self-resetting prestressed pipe piece 1, the plurality of first reserved pipelines 2 and the plurality of second reserved pipelines 3 are symmetrically arranged relative to the central axis of the self-resetting prestressed pipe piece 1.
With continued reference to fig. 1 to 3, one end of each of the plurality of first preformed pipelines 2 is disposed on a side surface of the self-resetting prestressed pipe piece 1, and the other end of each of the plurality of first preformed pipelines 2 penetrates through an end surface of the self-resetting prestressed pipe piece 1. Similar to the plurality of first reserved pipelines 2, one ends of the plurality of second reserved pipelines 3 are arranged on the side surface of the self-resetting prestressed pipe piece 1, and one ends of the plurality of second reserved pipelines 3 penetrate through the end surface of the self-resetting prestressed pipe piece 1. When the two self-resetting prestressed pipe piece structures are spliced, the parts of the plurality of first reserved pipelines 2 or the plurality of second reserved pipelines 3 penetrating through the end faces of the self-resetting prestressed pipe pieces 1 are inserted and spliced, so that the splicing of the two self-resetting prestressed pipe piece structures can be realized, and the splicing method is simple.
Referring to fig. 4 and 5, in order to firmly splice two adjacent self-resetting prestressed pipe piece structures, in this embodiment, a protrusion 21 is disposed at one end of the plurality of first reserved pipelines 2, which penetrates through the end face of the self-resetting prestressed pipe piece 1, and a groove 31 matched with the protrusion 21 is disposed at one end of the plurality of second reserved pipelines 3, which penetrates through the end face of the self-resetting prestressed pipe piece 1. When two self-resetting prestressed pipe piece structures are spliced, the lug 21 of one self-resetting prestressed pipe piece structure is inserted into the groove 31 of the other self-resetting prestressed pipe piece structure, and then the two self-resetting prestressed pipe piece structures can be firmly spliced together.
In a specific embodiment, the plurality of first preformed pipes 2 and the plurality of second preformed pipes 3 are hollow metal corrugated pipes. Considering from restoring to throne prestressing force segment structure in the assembling process, need to be a plurality of first reservation pipeline 2 and a plurality of the second is reserved pipeline 3 and is carried out the mud jacking, before segment structure concatenation, need clean the impurity of getting rid of in the metal bellows to corrugated pipe earlier, if adopt the compressed air machine to clear up the impurity in the metal bellows, then carry out the concatenation of adjacent segment structure, after the concatenation is accomplished, insert prestressing force coupling assembling 4 a plurality of first reservation pipeline 2 and a plurality of among the second reservation pipeline 3 to carry out anchor and stretch-draw to prestressing force coupling assembling 4, again after the stretch-draw is accomplished a plurality of first reservation pipeline 2 and a plurality of second reservation pipeline 3 carries out the mud jacking.
In a specific embodiment, the self-resetting prestressed pipe piece 1 is a concrete pipeline, the self-resetting prestressed pipe piece 1 contains microcapsules for self-repairing cracks of the self-resetting prestressed pipe piece 1, the microcapsules comprise a capsule core and a capsule wall, the capsule wall can be made of high-molecular organic materials sensitive to crack stress, such as polyacrylic resin, polystyrene resin or ethyl cellulose, and the capsule wall can be broken when the self-resetting prestressed pipe piece 1 cracks to release capsule core materials, and the capsule core materials can be made of curing repair materials having filling and repairing effects on the concrete cracks, such as epoxy resin, curing agents and the like, so that the self-repairing of the cracks is realized, and the strength of the self-resetting prestressed pipe piece 1 is improved.
In order to guarantee under meeting with earthquake or huge exogenic action, the stretch-draw deformation of section of jurisdiction seam crossing can be offset to the artificial prestressing force that produces of section of jurisdiction seam crossing, a plurality of in this embodiment first reserved pipeline 2 and a plurality of the number of second reserved pipeline 3 is the multiple of 4, several promptly first reserved pipeline 2 and a plurality of the number of second reserved pipeline 3 is 4N, wherein, N is nonzero natural number, for example, a plurality of first reserved pipeline 2 and a plurality of the number of second reserved pipeline 3 can be 4, 8, 12 etc..
In order to guarantee the waterproof effect of the joint of the duct piece, in the embodiment, the high-elasticity waterproof rubber pad 7 is arranged on the end surface of the self-resetting prestressed duct piece 1, and after the splicing of the adjacent self-resetting prestressed duct piece structures is completed, the high-elasticity rubber pad at the joint is tightly attached and compressed by a duct piece splicing machine, so that the waterproof effect of the joint of the duct piece is guaranteed. The surface of the high-elasticity waterproof rubber pad 7 is provided with a corrosion-resistant coating, the corrosion-resistant coating can be a chlorinated rubber coating added with nano aluminum oxide or an ethylene propylene diene monomer coating, and the like, the waterproof performance of the joint of the duct piece can be further ensured by arranging the corrosion-resistant coating, and the strength of the joint of the duct piece structure is improved.
Based on the self-resetting prestressed pipe piece structure, the invention also provides an assembling method of the self-resetting prestressed pipe piece structure, and as shown in fig. 5 specifically, the method comprises the following steps:
step S100, a first self-resetting prestressed pipe piece structure and a second self-resetting prestressed pipe piece structure are obtained, and a plurality of first reserved pipelines of the first self-resetting prestressed pipe piece structure are inserted into a plurality of second reserved pipelines of the second self-resetting prestressed pipe piece structure to obtain a plurality of connecting pipelines;
step S200, inserting a prestress connecting assembly into a plurality of connecting pipelines, taking two ends of the prestress connecting assembly as an anchoring end and a tensioning end respectively, and anchoring and pre-stressing tensioning the prestress connecting assembly through the prestress anchoring assembly and the prestress tensioning assembly;
step S300, after the prestressed connecting assembly is tensioned, grouting is carried out on the connecting pipelines so as to assemble the first self-resetting prestressed pipe piece structure and the second self-resetting prestressed pipe piece structure.
Specifically, the segment structure that uses in the subway tunnel includes standard block, adjacent block and capping piece, and in subway tunnel construction process, at first excavate through the shield constructs the machine, and after the excavation was accomplished, splice the segment structure according to the order of standard block, adjacent block and capping piece in proper order. For two adjacent self-resetting prestressed pipe piece structures to be assembled, in the embodiment, a first self-resetting prestressed pipe piece structure and a second self-resetting prestressed pipe piece structure are expressed, and the first self-resetting prestressed pipe piece structure and the second self-resetting prestressed pipe piece structure can be any one of a standard block, an abutting block and a capping block. When assembling, firstly, a first self-resetting prestressed pipe piece structure and a second self-resetting prestressed pipe piece structure are obtained, a plurality of first reserved pipelines of the first self-resetting pipe piece structure are inserted into a plurality of second reserved pipelines of the second self-resetting prestressed pipe piece structure, and a plurality of connecting pipelines consisting of the plurality of first reserved pipelines of the first self-resetting pipe piece structure and the plurality of second reserved pipelines of the second self-resetting prestressed pipe piece structure are obtained; after the first self-resetting segment structure and the second self-resetting segment structure are spliced, inserting a prestress connecting assembly into a plurality of connecting pipelines, taking two ends of the prestress connecting assembly as an anchoring end and a tensioning end respectively, and anchoring and pre-stressing tensioning the prestress connecting assembly through a pre-stressing anchoring assembly and a pre-stressing tensioning assembly; and after the tensioning of the prestress connecting assembly is finished, grouting is carried out on the connecting pipelines to complete the assembly of the first self-resetting prestress pipe piece structure and the second self-resetting prestress pipe piece structure.
In a specific embodiment, prestressing force coupling assembling is high elasticity steel strand wires or shape memory alloy, and high elasticity steel strand wires and shape memory alloy have great deformation recovery ability under the exogenic action, prestressing force anchor subassembly is extrusion die and extrusion cover, the prestressing force subassembly of stretching is jack and thrust plate, when carrying out the stretch-draw to prestressing force coupling assembling, carries out the stretch-draw to a plurality of connecting tube in proper order. Taking the prestressed connecting assembly as an example of a high-elasticity steel strand, when one connecting pipeline is tensioned, one end of the steel strand penetrates through the anchor backing plate, each steel strand is sleeved with the extrusion sleeve in sequence, and then the steel strands and the extrusion sleeves are flattened through the extrusion die, so that the effect of anchoring one end of the steel strand is achieved, and the redundant length of the steel strand is cut off by using a sand cutting machine. And for the other end of the steel strand, the steel strand penetrates through the anchor backing plate and the thrust plate, then a small-sized jack is adopted to clamp the steel strand bundle and act on the thrust plate, the steel strand is slowly and uniformly tensioned until the elongation of the steel strand reaches a preset elongation, the jack is stopped to stretch, the jack and the thrust plate are removed, and 3-5% of over-tension force is increased in the tensioning process by considering prestress loss factors such as an anchoring clamp.
And further, after the prestressed connecting assembly is tensioned, a piston type grouting pump is adopted to perform grouting on the connecting pipelines from the grouting holes of the anchor backing plate until the other ends of the connecting pipelines are full and discharged. In the slurry injection process, in order to prevent the prestress connecting assembly from being corroded and ensure that the metal corrugated pipe is filled with slurry, a reinforcing steel bar rust inhibitor is added into the slurry, the maximum pressure during slurry injection is 0.5-0.7 MPa, a pressure stabilization period exists in the slurry injection process, wherein the pressure of the pressure stabilization period is not less than 0.5MPa, and the time of the pressure stabilization period is not less than 3 min. After the slurry injection is finished, the anchor backing plates of the tensioning end and the anchoring end are cleaned and leveled, and the anchor is sealed by the protective cover, so that the anchor of the fixed end and the tensioning end is sealed. And after the tensioning of the connecting pipeline is finished, selecting the next connecting pipeline and repeating the steps until all the connecting pipelines are tensioned, and finishing the assembly of the first self-resetting prestressed pipe piece structure and the second self-resetting prestressed pipe piece structure. The self-resetting prestressed pipe piece structure in the embodiment has the advantages that the prestressed connecting assembly is inserted into the first reserved pipeline and the second reserved pipeline, the prestressed connecting assembly is anchored and prestressed in a tensioned mode through the prestressed anchoring assembly and the prestressed tensioning assembly, artificial prestress is generated before the prestressed pipe piece structure is subjected to external force load, tensioning deformation of the joint of the pipe piece can be offset under the action of earthquake or huge external force, and the inter-ring toughness of the shield tunnel structure is improved.
In order to guarantee under meeting with earthquake or huge exogenic action, the stretch-draw deformation of section of jurisdiction seam crossing can be offset to the artificial prestressing force that produces of section of jurisdiction seam crossing, a plurality of in this embodiment first reserved pipeline and a plurality of the number of second reserved pipeline is the multiple of 4, a plurality of promptly first reserved pipeline and a plurality of the number of second reserved pipeline is 4N, wherein, N is non-zero natural number, and by first a plurality of from restoring to the throne the section of jurisdiction structure first reserved pipeline with the second is from restoring to the throne a plurality of connecting tubes that the pipeline is constituteed are adjacent in the connecting tube the opposite position of prestressing force coupling assembling's stretch-draw end and anchor end. For example, when the number of the first reserved pipelines and the second reserved pipelines is 4, 4 connecting pipelines can be formed by the first reserved pipelines and the second reserved pipelines of the first self-resetting segment structure, for example, four connecting pipelines are a connecting pipeline 1, a connecting pipeline 2, a connecting pipeline 3 and a connecting pipeline 4 which are adjacent in sequence, if the left end of the prestress connecting component in the connecting pipeline 1 is an anchoring end and the right end is a tensioning end, the left end of the prestress connecting component in the connecting pipeline 2 is a tensioning end and the right end is an anchoring end, the left end of the prestress connecting component in the connecting pipeline 3 is an anchoring end and the right end is a tensioning end, the left end of the prestress connecting component in the connecting pipeline 4 is a tensioning end and the right end is an anchoring end, so that the connecting pipelines can be uniformly tensioned in a staggered manner, the stress of the segment structure is ensured to be uniform.
In a specific embodiment, the plurality of first reserved pipelines and the plurality of second reserved pipelines are hollow metal corrugated pipes, and before the first self-resetting prestressed pipe piece structure and the second prestressed pipe piece structure are spliced, impurities in the metal corrugated pipes need to be removed, for example, the impurities in the metal corrugated pipes are cleaned by using a compressed air machine, so that the influence on the strength of joints of the pipe piece structures due to the fact that impurities are mixed in slurry in a subsequent grouting process is avoided.
In a specific embodiment, the self-resetting prestressed pipe piece is a concrete pipeline, the self-resetting prestressed pipe piece contains microcapsules for self-repairing cracks of the self-resetting prestressed pipe piece, each microcapsule comprises a capsule core and a capsule wall, the capsule wall can be made of high-molecular organic materials sensitive to crack stress, such as polyacrylic resin, polystyrene resin or ethyl cellulose, and the capsule wall can break when cracks are generated in the self-resetting prestressed pipe piece to release the capsule core material, and the capsule core material can be made of curing repair materials, such as epoxy resin, curing agents and the like, which have the effects of filling and repairing the concrete cracks, so that the self-repairing of the cracks is realized, and the strength of the self-resetting prestressed pipe piece is improved.
In a specific embodiment, in order to guarantee the waterproof effect of the segment joint, in this embodiment, the two ends of the first self-resetting prestressed segment structure and the second self-resetting prestressed segment structure are both provided with high-elasticity waterproof rubber pads, and after the splicing of the first self-resetting prestressed segment structure and the second self-resetting prestressed segment structure is completed, the segment erector is adopted to tightly cling to the high-elasticity rubber pads at the joint, so that the waterproof effect of the segment joint is guaranteed. The corrosion-resistant coating is arranged on the surface of the high-elasticity waterproof rubber pad, can be a chlorinated rubber coating added with nano aluminum oxide or an ethylene propylene diene monomer coating, and the like, can further ensure the waterproof performance of the joint of the duct piece and improve the strength of the joint of the duct piece structure.
In summary, the present invention discloses a self-resetting prestressed pipe piece structure and an assembling method thereof, including: the self-resetting prestressed pipe piece comprises a self-resetting prestressed pipe piece, a plurality of first reserved pipelines, a plurality of second reserved pipelines and a prestressed connecting assembly, wherein the first reserved pipelines and the second reserved pipelines are arranged in the self-resetting prestressed pipe piece, and the prestressed connecting assembly penetrates through the first reserved pipelines and the second reserved pipelines in the assembling process of the self-resetting prestressed pipe piece and carries out anchoring and prestressed tensioning through a prestressed anchoring assembly and a prestressed tensioning assembly. This application is from prestressing force section of jurisdiction structure that restores to throne interlude prestressing force coupling assembling in first reserved pipeline and second reserved pipeline to carry out anchor and prestressing force tensioning to prestressing force coupling assembling through prestressing force anchor subassembly and prestressing force tensioning assembly, before prestressing force section of jurisdiction structure receives external load effect, artificial production prestressing force in advance, under meeting with earthquake or huge external force effect, can offset the stretch-draw deformation of section of jurisdiction seam crossing, improve shield tunnel structure's inter-ring toughness.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (5)
1. A self-resetting prestressed pipe piece structure is characterized by comprising: the self-resetting prestressed pipe piece comprises a self-resetting prestressed pipe piece, a plurality of first reserved pipelines, a plurality of second reserved pipelines and a prestressed connecting assembly, wherein the first reserved pipelines and the second reserved pipelines are arranged in the self-resetting prestressed pipe piece; one ends of the plurality of first reserved pipelines are arranged on the side surface of the self-resetting prestressed pipe piece, and the other ends of the plurality of first reserved pipelines penetrate through the end surface of the self-resetting prestressed pipe piece; one ends of the second reserved pipelines are arranged on the side surface of the self-resetting prestressed pipe piece, and the other ends of the second reserved pipelines penetrate through the end surface of the self-resetting prestressed pipe piece; the number of the first reserved pipelines and the number of the second reserved pipelines are both 4N, wherein N is a non-zero natural number; the tension end and the anchoring end of the prestress connecting component in the adjacent connecting pipeline in a plurality of connecting pipelines consisting of a plurality of first reserved pipelines of one self-resetting prestress pipe piece structure and a plurality of second reserved pipelines of the other self-resetting prestress pipe piece structure are opposite; the prestress connecting assembly is a high-elasticity steel strand or a shape memory alloy;
a plurality of first reserved pipelines are provided with a lug at one end penetrating through the end face of the self-resetting prestressed pipe piece, and a plurality of second reserved pipelines are provided with a groove matched with the lug at one end penetrating through the end face of the self-resetting prestressed pipe piece;
the plurality of first reserved pipelines and the plurality of second reserved pipelines are hollow metal corrugated pipes;
the self-resetting prestressed pipe piece comprises microcapsules for self-repairing cracks of the self-resetting prestressed pipe piece, wherein each microcapsule comprises a capsule core and a capsule wall, the capsule wall is made of a high-molecular organic material sensitive to crack stress, and the capsule core is made of a curing repairing material which has the effects of filling and repairing concrete cracks.
2. The self-resetting prestressed pipe piece structure of claim 1, wherein a plurality of said first pre-reserved pipes and a plurality of said second pre-reserved pipes are symmetrically disposed at both ends of said self-resetting prestressed pipe piece.
3. The self-resetting prestressed pipe piece structure of claim 1, wherein a highly elastic waterproof rubber pad is disposed on the end face of said self-resetting prestressed pipe piece.
4. A method of assembling a self-resetting prestressed pipe segment structure according to any one of claims 1 to 3, comprising:
the method comprises the steps of obtaining a first self-resetting prestressed pipe piece structure and a second self-resetting prestressed pipe piece structure, and inserting a plurality of first reserved pipelines of the first self-resetting prestressed pipe piece structure into a plurality of second reserved pipelines of the second self-resetting prestressed pipe piece structure to obtain a plurality of connecting pipelines;
inserting a prestress connecting assembly into the connecting pipelines, taking two ends of the prestress connecting assembly as an anchoring end and a tensioning end respectively, and anchoring and pre-stressing tensioning the prestress connecting assembly through the prestress anchoring assembly and the prestress tensioning assembly;
and after the tensioning of the prestress connecting assembly is finished, grouting is carried out on the connecting pipelines so as to realize the assembly of the first self-resetting prestress pipe piece structure and the second self-resetting prestress pipe piece structure.
5. The method of assembling a self-resetting prestressed pipe piece structure according to claim 4, wherein the positions of the tension end and the anchoring end of said prestressed connecting units in adjacent connecting pipes are opposite.
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| CN102536265A (en) * | 2012-02-03 | 2012-07-04 | 葛洲坝集团第五工程有限公司 | Shield tunneling prestress lining construction method and used prestressed pipe pieces |
| CN102995660A (en) * | 2012-12-21 | 2013-03-27 | 张双里 | Multifunctional arched combined prestress underground pipe gallery for cisty and preparation process thereof |
| CN107620598A (en) * | 2017-09-01 | 2018-01-23 | 同济大学 | A kind of shield tunnel lining segment and its reinforcement means |
| CN108729346A (en) * | 2018-07-02 | 2018-11-02 | 长沙理工大学 | Circumferential prestressed pipeline structure and manufacturing method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536265A (en) * | 2012-02-03 | 2012-07-04 | 葛洲坝集团第五工程有限公司 | Shield tunneling prestress lining construction method and used prestressed pipe pieces |
| CN102995660A (en) * | 2012-12-21 | 2013-03-27 | 张双里 | Multifunctional arched combined prestress underground pipe gallery for cisty and preparation process thereof |
| CN107620598A (en) * | 2017-09-01 | 2018-01-23 | 同济大学 | A kind of shield tunnel lining segment and its reinforcement means |
| CN108729346A (en) * | 2018-07-02 | 2018-11-02 | 长沙理工大学 | Circumferential prestressed pipeline structure and manufacturing method |
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