CN108547619B - Underground shaft assembly recovery type prestress supporting equipment - Google Patents
Underground shaft assembly recovery type prestress supporting equipment Download PDFInfo
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- CN108547619B CN108547619B CN201810468557.6A CN201810468557A CN108547619B CN 108547619 B CN108547619 B CN 108547619B CN 201810468557 A CN201810468557 A CN 201810468557A CN 108547619 B CN108547619 B CN 108547619B
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- 238000011084 recovery Methods 0.000 title claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 199
- 239000010959 steel Substances 0.000 claims abstract description 199
- 241000357293 Leptobrama muelleri Species 0.000 claims abstract description 18
- 230000007704 transition Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 27
- 239000002689 soil Substances 0.000 abstract description 8
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000429 assembly Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/06—Lining shafts; Linings therefor with iron or steel
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses an underground shaft assembling and recycling type prestress supporting device, which comprises: steel ring beam, assembled prestress well wall supporting component and assembled steel back cover; the steel ring beam is of an annular structure matched with a wellhead at the top end of the underground shaft; the whole shape of the assembled prestressed well wall supporting component is an annular structure matched with the shape of the well wall in the underground shaft; an assembled pre-stress well wall supporting component is arranged below the steel ring beam, the uppermost end of the assembled pre-stress well wall supporting component is fixedly connected with the steel ring beam, and the assembled pre-stress well wall supporting component is supported on the inner well wall of the underground shaft; the assembled steel back cover is fixedly connected with the lowest end of the assembled prestress well wall supporting component, and the assembled steel back cover is positioned at the bottom of the underground vertical shaft. The device is convenient to assemble and use, convenient to recycle and reuse after use, free of pollution to soil, free of influencing other projects, capable of improving construction efficiency and reducing construction cost.
Description
Technical Field
The invention relates to the field of shaft support, in particular to an underground shaft assembly recovery type prestress support device.
Background
In the current construction of tunnels, subways and the like, a shield technology is required. In the existing shield construction, the shield cutterhead needs to be overhauled in the construction process, and the shield cutterhead needs to be overhauled, namely, a repair well, namely, a vertical shaft, is arranged on an excavated route at intervals at present. However, some shield well inspection and repair projects, such as urban subway projects, have the characteristics of limited construction sites, dense peripheral pipelines, high surface subsidence control requirements, short construction period and the like. The existing manhole construction mostly adopts manual hole digging piles or anchor spraying reverse vertical shafts, and the manual hole digging process has the problems of narrow operation space, unreliable wall protection quality, large potential safety hazard and the like; the anchor spraying reverse method has the defects of large dust pollution, various construction mechanical equipment, large influence of anchor spraying operation on the construction speed and the like in anchor spraying construction; the guard wall structure of the inspection well is stressed after the soil body is deformed, is in a passive stress state and is easy to cause surface subsidence, so that the guard wall structure is very unfavorable for construction in cities with higher subsidence requirements. Therefore, the inventor finds that how to safely, efficiently and pollution-free finish the well wall support in the construction of the shield cutter head overhaul well in the construction environment with more risk sources near the engineering is a problem to be solved.
Disclosure of Invention
Based on the problems existing in the prior art, the invention aims to provide the assembly recovery type prestress supporting equipment for the underground shaft, which can be used as the supporting of the wall of the underground shaft, is convenient to assemble and use on a construction site, is convenient to recycle and reuse after use, has no residue in soil body, can not cause pollution, ensures construction safety, effectively reduces peripheral earth surface subsidence, reduces construction cost and shortens construction time.
The invention aims at realizing the following technical scheme:
The embodiment of the invention provides an underground shaft assembly recovery type prestress supporting device, which comprises:
Steel ring beam, assembled prestress well wall supporting component and assembled steel back cover; wherein,
The steel ring beam is of an annular structure matched with a wellhead at the top end of the underground shaft;
the whole shape of the assembled pre-stress well wall supporting component is an annular structure matched with the shape of the inner well wall of the underground shaft;
The assembled pre-stress well wall supporting component is arranged below the steel ring beam, the uppermost end of the assembled pre-stress well wall supporting component is fixedly connected with the steel ring beam, and the assembled pre-stress well wall supporting component is supported on the inner well wall of the underground shaft;
the assembled steel back cover is fixedly connected with the lowest end of the assembled prestress well wall supporting component, and the assembled steel back cover is positioned at the bottom of the underground shaft.
According to the technical scheme provided by the invention, the underground shaft assembly recovery type prestress supporting device provided by the embodiment of the invention has the beneficial effects that:
The steel ring beam and the steel back cover are arranged, and the assembly type prestress well wall supporting component is arranged between the steel ring beam and the steel back cover, so that the well wall of the underground shaft is supported in the circumferential direction through the assembly type prestress well wall supporting component, the supporting equipment is suitable for supporting the well wall of the underground shaft, can be assembled to be supported on the well wall of the underground shaft, applies prestress to a soil body, and reduces ground subsidence caused by soil body deformation; the prefabricated structures are provided with the strip holes with different directions and sizes, so that the effective connection among the structures is effectively ensured, and the safety of the structure is improved; the support equipment is convenient to adopt factory prefabrication and site assembly due to the assembled structure, so that the support equipment is convenient to support and use during construction, convenient to recycle after use, capable of being recycled in a plurality of projects, improving the construction efficiency of an underground shaft, reducing environmental pollution and also reducing construction cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic overall cross-sectional view of an underground shaft assembly recovery type prestress support device provided by an embodiment of the invention;
Fig. 2 is a schematic plan view of a steel ring beam of an assembled recovery type prestress supporting device according to an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view taken at A-A of FIG. 2;
Fig. 4 is a schematic view of an assembled steel back cover of an assembled recovery type prestress supporting device according to an embodiment of the invention;
FIG. 5 is a schematic cross-sectional view at B-B in FIG. 4;
FIG. 6 is a schematic cross-sectional view at C in FIG. 4;
fig. 7 is a schematic diagram of an assembled steel waist beam structure of the conventional section assembled recovery type prestress supporting equipment provided by the embodiment of the invention;
Fig. 8 is a schematic structural view of an arc-shaped sub-beam of an assembled steel waist beam of the conventional section assembled recovery type prestress supporting equipment provided by the embodiment of the invention;
FIG. 9 is a schematic cross-sectional view taken at D-D of FIG. 8;
FIG. 10 is a schematic cross-sectional view taken along line E-E of FIG. 8;
FIG. 11 is an enlarged schematic view of the portion F in FIG. 8;
FIG. 12 is a schematic cross-sectional view taken at F1-F1 of FIG. 11;
fig. 13 is a schematic structural view of a prestressed circumferential steel wale connector of an assembled steel wale of a conventional segment assembly recovery type prestressed supporting device according to an embodiment of the present invention;
FIG. 14 is a schematic cross-sectional view at G-G of FIG. 13;
FIG. 15 is a schematic cross-sectional view at H-H of FIG. 13;
fig. 16 is a schematic diagram of a prestress adjustment connection state of an assembled steel waist beam of a conventional section assembled recovery type prestress support device provided by an embodiment of the invention;
Fig. 17 is a schematic diagram of a prestress adjustment state of an assembled steel waist beam of a conventional section assembled recovery type prestress supporting device provided by an embodiment of the invention;
fig. 18 is a schematic view of an assembled steel wale connection longitudinal connector according to an embodiment of the present invention;
Fig. 19 is a schematic structural view of an assembled corrugated plate of a conventional section assembled recovery type prestress supporting device provided by an embodiment of the invention;
FIG. 20 is a schematic view of an arc corrugated board structure of a spliced corrugated board of a conventional section assembled recovery type prestress supporting device according to an embodiment of the invention;
FIG. 21 is an enlarged schematic view of the portion I in FIG. 20;
Fig. 22 is a schematic view of an arc corrugated board structure of an assembled corrugated board of a conventional section assembled recovery type prestress supporting device provided by an embodiment of the invention;
fig. 23 is a schematic view of an assembled corrugated plate of the conventional section assembled recovery type prestress supporting equipment according to an embodiment of the invention;
FIG. 24 is a schematic cross-sectional view at J-J of FIG. 22;
FIG. 25 is a schematic cross-sectional view at K-K of FIG. 22;
fig. 26 is a schematic structural view of an assembled steel waist beam of the shield segment assembly type support assembly according to the embodiment of the present invention;
Fig. 27 is a schematic structural view of an elliptical ring-shaped assembled steel wale according to an embodiment of the present invention;
In fig. 1 to 6: 1-steel ring beams; 11-ring-shaped steel plates; 12-annular channel steel; 13-bolt holes; 2-an assembled prestressed well wall supporting component; 21-a conventional section assembly type prestress well wall supporting subassembly; 211-an assembled steel waist beam of the conventional section assembled prestress well wall supporting subassembly; 212-assembled corrugated plates of the conventional section assembled prestressed well wall supporting subassembly; 213-longitudinal connectors of conventional section fabricated prestressed borehole wall supporting sub-assemblies; 214-back filler; 22-transition section assembled prestressed well wall supporting sub-assembly; 221-assembling type steel waist beam of the transition section assembled prestress well wall supporting subassembly; 222-assembled corrugated plate of transition section assembled prestressed well wall supporting subassembly; 23-shield segment assembly type prestress well wall supporting subassembly; 231-assembled steel waist beam of shield segment assembled prestress well wall supporting subassembly; 232-assembling corrugated plates of the shield segment assembly type prestress well wall supporting subassembly; 233-longitudinal connectors of the shield segment assembly type prestressed borehole wall supporting subassembly; 234-back filling material of shield segment assembly type prestress well wall supporting subassembly; 3-assembling steel back covers; 31-a bottom sealing steel plate; 32-section steel; 321-first connecting steel plates; 322-second connecting steel plates; 323-bolt holes; 4-ground; 5-wellhead guardrail
Fig. 7 to 12: 211-a first arc sub-beam; 212-a second arc sub-beam; 213-a third arc sub-beam; 214-a first circumferential pre-stressed steel wale connection; 215-a second circumferential pre-stressed steel wale connection; 216-a third circumferential pre-stressed steel wale connection; 2121-elongated bolt holes; 2122-cutting an opening; 2125-bolt holes;
Fig. 13 to 17: 2141-a bolt; 214-a first circumferential pre-stressed steel wale connection; 2123-shearing resistance; 2127-corbel; 217-wedge; 6-jack;
in fig. 18: 211-an assembled steel waist beam of the conventional section assembled prestress well wall supporting subassembly; 213-longitudinal connectors of conventional section fabricated prestressed borehole wall supporting sub-assemblies;
fig. 19 to 25: 2121-a first arcuate wavelet plate; 2122-a second arcuate wavelet plate; 2123-third arcuate wavelet plates; 21211-elongated holes; 2121-elongate hole ends; 2122-connecting hole ends; 2121-rib plates are added at the ends of the long holes; 2124-jack slots at the ends of the long holes; 2125-rib plate at the end of the connecting hole; 2126-jack slots at the connecting hole ends; 6-jack;
In fig. 26: 2311-a first arc-shaped sub-beam; 2312-a second arc sub-beam; 2313-a third arc sub-beam; 2314-fourth arc-shaped sub beams; 2315-a first circumferential pre-stressed steel wale connection; 2316-a second circumferential prestressed steel wale connection piece; 2317-a third circumferential prestress steel waist beam connecting piece; 2318-fourth circumferential prestressed steel wale connecting pieces;
In fig. 27: 411. 412, 413, 414 are first, second, third and fourth arcuate sub-beams, respectively; 415. 416 are first and second straight sub-beams, respectively; 417. 418, 419, 420 are respectively first, second, third and fourth prestressed circumferential steel wale connectors; 421-inner support; 4221. 4222 is a first and second inner support connector, respectively.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical solutions of the embodiments of the present invention in conjunction with the specific contents of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention. What is not described in detail in the embodiments of the present invention belongs to the prior art known to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides an underground shaft assembling and recovering type prestress supporting device, which can be used in construction of an underground shaft such as a shield cutter head maintenance well, and includes:
Steel ring beam, assembled prestress well wall supporting component and assembled steel back cover; wherein,
The steel ring beam is of an annular structure matched with a wellhead at the top end of the underground shaft;
the whole shape of the assembled pre-stress well wall supporting component is an annular structure matched with the shape of the inner well wall of the underground shaft;
The assembled pre-stress well wall supporting component is arranged below the steel ring beam, the uppermost end of the assembled pre-stress well wall supporting component is fixedly connected with the steel ring beam, and the assembled pre-stress well wall supporting component is supported on the inner well wall of the underground shaft;
the assembled steel back cover is fixedly connected with the lowest end of the assembled prestress well wall supporting component, and the assembled steel back cover is positioned at the bottom of the underground shaft.
As shown in fig. 2, in the supporting device, the steel ring beam is formed by welding an annular steel plate and an annular channel steel; the annular channel steel is welded on the edge of an opening of the inner ring of the annular steel plate, and a plurality of bolt holes for connecting the assembled prestress well wall supporting component are distributed at the bottom of the inner side of the annular channel steel; the steel ring beam is circular or elliptical, and is matched with the cross section of the underground shaft. The annular channel steel is provided with a wellhead guardrail, and the preferable wellhead guardrail adopts a corrugated retaining wall.
As shown in fig. 3 to 6, in the support equipment, the assembled steel back cover is formed by connecting a back cover steel plate and a plurality of section steel densely paved above the back cover steel plate with an assembled steel waist beam at the periphery of the back cover steel plate through a connecting piece; namely, two ends of each type steel are connected with the spliced steel waist beam at the periphery of the back cover steel plate through connecting pieces, each connecting piece is composed of a first connecting steel plate and a second connecting steel plate which are stacked and provided with bolt holes, and the back cover is connected with the first steel plate, the second steel plate and the spliced steel waist beam through bolts. The assembled steel back cover is circular or elliptical, and can be matched with the cross section of the underground shaft. The bottom sealing steel plate is paved at the bottom of the vertical shaft and can be formed by assembling a plurality of sub bottom sealing steel plates.
Further comprises: the back filling material is filled between the assembled prestress well wall supporting component and the inner well wall of the underground shaft, the back filling material adopts high polymer filling material, and the back filling material is arranged to enable the supporting component to be better attached to the well wall of the underground shaft, so that better supportability is achieved.
As shown in fig. 1, in the above-mentioned supporting apparatus, the prefabricated prestressed well wall supporting component includes: one or more of a conventional section assembly type prestress well wall supporting subassembly, a transition section assembly type prestress well wall supporting subassembly and a shield section assembly type prestress well wall supporting subassembly;
If the support assembly includes: the conventional section assembled pre-stress well wall supporting sub-assembly, the transition section assembled pre-stress well wall supporting sub-assembly and the shield section assembled pre-stress well wall supporting sub-assembly are arranged in the underground vertical shaft from top to bottom to respectively support the well walls of the conventional section, the transition section and the shield section, and are sequentially connected.
As shown in fig. 7 to 17, in the above-mentioned supporting device, the conventional segment and shield segment assembled pre-stressing borehole wall supporting subassemblies (refer to the conventional segment assembled pre-stressing borehole wall supporting subassemblies and the shield segment assembled pre-stressing borehole wall supporting subassemblies) each include: the steel waist rail comprises a plurality of spliced steel waist rails, a plurality of spliced corrugated plates and a plurality of longitudinal connecting pieces; wherein,
Each spliced steel waist beam is of an annular structure matched with the shape of the inner wall of the underground shaft (the spliced steel waist beam of an annular structure is shown in fig. 7, and can also be of an elliptical annular structure, so long as the spliced steel waist beam is matched with the shape of the inner wall of the underground shaft);
each spliced corrugated plate is of an annular structure matched with the shape of the inner wall of the underground shaft;
the spliced steel waist beams and the spliced corrugated plates are arranged in an alternating arrangement mode that one spliced steel waist beam is arranged from top to bottom and is connected with one spliced corrugated plate, and adjacent spliced steel waist beams are fixedly connected with the spliced corrugated plates;
Each longitudinal connecting piece is connected to the inner walls of the plurality of spliced steel waist beams from top to bottom;
The well wall supporting subassembly is suitable for supporting the conventional section of the shield cutter head inspection well and the well wall of the shield section, and the supporting subassembly and the well wall are combined alternately through the spliced steel waist beam and the spliced corrugated plates to form a supporting force, and back filling materials can be filled behind the spliced corrugated plates, so that the attaching effect of the supporting subassembly and the well wall is improved.
The transition section assembled prestressed well wall supporting subassembly comprises: a plurality of spliced steel waist beams and a plurality of longitudinal connecting pieces; wherein,
Each spliced steel waist beam is of an annular structure matched with the shape of the inner well wall of the underground shaft;
The plurality of spliced steel waist beams are densely distributed from top to bottom, and adjacent spliced steel waist beams are fixedly connected;
Each longitudinal connecting piece is connected to the inner walls of the plurality of spliced steel waist beams from top to bottom.
The supporting subassembly is suitable for supporting the well wall of the transition section between the conventional section and the shield section of the shield cutter head inspection well, and the reinforcing ring with strong supporting force is formed due to the densely distributed arrangement of the plurality of spliced steel waist beams.
In the support equipment, the assembled steel waist beams of the conventional section, the transition section and the shield section assembled prestress well wall support subassembly all comprise: a plurality of arc sub-beams and a plurality of prestress circumferential steel waist beam connectors;
The plurality of arc-shaped sub beams are connected into a circular ring-shaped structure capable of adjusting prestress in a circumferential direction through the plurality of prestress circumferential steel waist beam connecting pieces; preferably, each arc sub-beam adopts the cross section to be square pipe to make, evenly sets up rectangular bolt hole respectively at the upper and lower surface of square pipe, and the component (such as steel ring roof beam, pin-connected panel buckled plate) of convenient connection pin-connected panel steel waist rail upper and lower side is equipped with the cutting opening in the side of putting in place of square pipe that rectangular bolt hole corresponds, and the cutting opening is got rid of a side wall formation of square pipe by the cutting, and the cutting opening corresponds to the position that is equipped with rectangular bolt hole, can conveniently set up the bolt as the connecting piece on the rectangular bolt hole through the cutting opening (see fig. 8 to 10). The end parts of the arc-shaped sub beams are welded with corbels and are used for placing jacks for applying circumferential prestress; wedge blocks are arranged in the end parts of the arc-shaped sub beams and are used for fixing the steel waist beams after prestressing force is applied, so that force relaxation is prevented; the inner side of each arc-shaped sub-beam is provided with shear bars for increasing the strength. The end of each arc-shaped sub beam is reserved with a bolt hole for connecting and fixing a prestress annular steel waist beam connecting piece of the steel waist beam.
The assembled corrugated plates of the conventional section and shield section assembled prestressed well wall supporting subassembly all comprise:
The device comprises a plurality of arc-shaped corrugated plates and a plurality of corrugated plate connecting pieces, wherein the head end of each arc-shaped corrugated plate is a connecting hole end, the tail end of each arc-shaped corrugated plate is a strip hole end matched with the connecting hole end, and the arc-shaped corrugated plates are connected into a circular ring structure capable of circumferentially adjusting prestress through the plurality of corrugated plate connecting pieces in a head-to-tail end connection mode (see figure 19). When the corrugated board is used, the corrugated boards are fixed by adopting corrugated board connecting pieces (can be bolts) after being pre-tensioned, and preferably, the corrugated boards are pre-tensioned by adopting jacks.
The two side edges of each arc-shaped corrugated board except the head end and the tail end are respectively provided with a transverse connecting side edge, a plurality of strip-shaped connecting holes are uniformly distributed on the connecting side edges, and the arc-shaped corrugated board is conveniently connected with the upper and lower spliced steel waist beams (see fig. 22-24).
As shown in fig. 13 to 15, in the support device, each of the spliced steel waist beams adopts a sleeve structure with adjustable length, preferably a variable length sleeve structure, the sleeve structure is provided with a long strip-shaped connecting hole, the end of each arc-shaped sub-beam is provided with a long strip-shaped connecting hole, and a plurality of parallel long strip-shaped connecting holes of each arc-shaped sub-beam are matched with a plurality of parallel long strip-shaped connecting holes of the prestressed steel waist beam connecting piece; the spliced steel waist beam with the structure is convenient to be pre-tightened by the jack and then is fixed into a ring by adopting a pre-stress ring-shaped steel waist beam connecting piece.
As shown in fig. 19 to 25, in the assembled corrugated plate, the connecting hole end at the head end of each arc-shaped corrugated plate is provided with a plurality of rows of connecting holes arranged in parallel from top to bottom, each row of connecting holes comprises a plurality of connecting holes arranged at intervals, and the strip hole end at the tail end of each arc-shaped corrugated plate is provided with a plurality of strip holes arranged in parallel from top to bottom; and rib plates are arranged at the head end and the tail end of each arc-shaped corrugated board, jack clamping grooves are respectively arranged at the two ends of each rib plate, so that jacks are conveniently arranged between two connected corrugated boards, and prestress adjustment is realized. The corrugated boards in the structure form are convenient to connect and can also perform prestress adjustment.
In the support equipment, in the assembled steel waist beam of the conventional section and transition section assembled prestress well wall support subassembly, a plurality of arc-shaped sub Liang Wei can be assembled into three arc-shaped sub beams with circular ring structures; three prestressed circumferential steel wale connectors (see fig. 7);
in the assembled corrugated plate of the conventional section assembled prestressed well wall supporting subassembly, the plurality of arc-shaped corrugated plates are three arc-shaped corrugated plates which can be assembled into a circular structure through beams; three of the plurality of corrugated board connectors (see fig. 19);
In the spliced steel waist beam of the shield segment assembly type prestress well wall supporting subassembly, a plurality of arc-shaped sub Liang Wei can be spliced into four arc-shaped sub beams with circular ring structures; four prestressed circumferential steel wale connectors (see fig. 26);
In the spliced corrugated plate of the shield segment assembly type prestress well wall supporting subassembly, a plurality of arc-shaped corrugated plates are four arc-shaped corrugated plates which can be spliced into a circular structure by beams; four corrugated plate connectors (not shown in the figure, but similar to the spliced steel wale structure illustrated in fig. 26).
The assembled steel waist beam and the assembled corrugated plate with the structure are arranged in the joint of the support dismantling side and the support retaining side in the shield section of the underground shaft in an aligned joint arrangement, so that the sub-beams and the corrugated plates of the support sub-assembly are partially dismantled during soil backfilling.
In the support equipment, in the conventional section assembled prestress well wall support subassembly, the joints of the upper and lower adjacent two assembled steel waist beams are staggered, and the joints of the upper and lower adjacent two assembled corrugated plates are staggered;
in the transition section assembly type prestress well wall supporting subassembly, joints of two assembly type steel waist beams which are adjacent up and down are staggered;
The joints are staggered, so that the stability of the support is improved.
In the shield segment assembly type prestress well wall supporting subassembly, joints of all assembled steel waist beams and assembled corrugated plates at the joint of a supporting dismantling side and a supporting retaining side in a shield segment of an underground vertical shaft are aligned joint arrangement, joints of two assembled steel waist beams adjacent to each other up and down at the rest positions are staggered, and joints of two assembled corrugated plates adjacent to each other up and down at the rest positions are staggered.
The annular assembled prestress well wall supporting component is suitable for being used in circular underground shaft construction.
Referring to fig. 27, an oval assembled steel wale is illustrated, which is used in an oval assembled prestressed well wall supporting component, specifically, in the supporting component, the assembled steel wale of the assembled prestressed well wall supporting sub-component of the conventional section, the transition section and the shield section comprises:
The steel waist beam comprises a plurality of arc-shaped sub-beams, a plurality of straight sub-beams and a plurality of prestress annular steel waist beam connecting pieces; wherein,
The plurality of arc-shaped sub-beams and the plurality of straight plate sub-beams are connected into an elliptical ring structure capable of adjusting prestress in a circumferential direction through the plurality of prestress circumferential steel waist beam connecting pieces; preferably, each arc sub-beam and each straight sub-beam are made of square tubes with square cross sections, strip bolt holes are uniformly formed in the upper surface and the lower surface of each square tube respectively, components (such as steel ring beams and assembly type corrugated plates) on the upper side and the lower side of each assembled steel waist beam are conveniently connected, a cutting opening is formed in the inner side of each square tube at the corresponding position of each strip bolt hole, the inner side wall of each square tube is removed through cutting, the cutting opening corresponds to the position provided with each strip bolt hole, and bolts serving as connecting pieces can be conveniently arranged on the strip bolt holes through the cutting openings (see fig. 8-10). Other structures of each arc-shaped sub-beam and each straight-plate sub-beam are the same as each sub Liang Jiben of the spliced steel waist beam of the annular supporting component, and are not repeated here.
The assembled corrugated plates of the conventional section and shield section assembled prestressed well wall supporting subassembly all comprise:
The device comprises a plurality of arc-shaped corrugated plates, a plurality of straight corrugated plates and a plurality of corrugated plate connecting pieces, wherein the head end of each corrugated plate is a connecting hole end, the tail end of each corrugated plate is a strip hole end matched with the strip hole end, and the plurality of arc-shaped corrugated plates and the plurality of straight corrugated plates are connected in an end-to-end mode through the plurality of corrugated plate connecting pieces to form an elliptical ring structure capable of circumferentially adjusting prestress.
The two side edges of each arc-shaped corrugated plate and each straight corrugated plate except the head end and the tail end are respectively provided with a transverse connecting side edge, a plurality of strip-shaped connecting holes are uniformly distributed on the connecting side edges, and the arc-shaped corrugated plates and the straight corrugated plates are conveniently connected with the upper and lower spliced steel waist beams (see fig. 22-24).
In the spliced steel waist beam of the support equipment, each prestress circumferential steel waist beam connecting piece adopts a sleeve box structure with adjustable length, the sleeve box structure is provided with long strip-shaped connecting holes, the end part of each arc-shaped sub-beam and the end part of each straight-plate sub-beam are provided with long strip-shaped connecting holes, and a plurality of parallel long strip-shaped connecting holes of each arc-shaped sub-beam and a plurality of parallel long strip-shaped connecting holes of each straight-plate sub-beam are matched with the plurality of parallel long strip-shaped connecting holes of the prestress circumferential steel waist beam connecting piece;
In the spliced corrugated plate, a plurality of rows of connecting holes which are arranged in parallel from top to bottom are formed at the connecting hole end of the head end of each corrugated plate (namely, each arc-shaped corrugated plate and each straight corrugated plate), each row of connecting holes comprises a plurality of connecting holes which are arranged at intervals, and a plurality of strip-shaped holes which are arranged in parallel from top to bottom are formed at the strip-shaped hole end of the tail end of each corrugated plate; and rib plates are arranged at the head end and the tail end of each wavelet plate, jack clamping grooves are respectively arranged at the two ends of each rib plate, so that jacks are conveniently arranged between two connected wavelet plates, and prestress adjustment is realized. The corrugated boards in the structure form are convenient to connect and can also perform prestress adjustment.
In the support equipment, in each assembled steel waist beam, a plurality of arc-shaped sub Liang Wei energy beams can be assembled into six arc-shaped sub beams with two semicircular ring structures; the plurality of straight plate sub-beams are two straight plate sub-beams which are connected in parallel between the two semicircular ring structures; two prestress annular steel waist beam connectors are provided;
in the spliced corrugated plate, a plurality of arc-shaped corrugated plates are six arc-shaped corrugated plates which can be spliced into two semicircular structures by beams; the plurality of straight slab corrugated plates are two straight slab corrugated plates which are connected in parallel between the two semicircular ring structures, and each corrugated plate connecting piece adopts bolts.
The support equipment further comprises: and the two ends of the inner supporting piece are respectively connected with the two opposite straight plate sub-beams, and are supported between the two opposite straight plate sub-beams. The split-mounting type steel waist beam is convenient for supporting the oval-shaped supporting sub-assembly from the inside, a plurality of inner supporting pieces are arranged, and each inner supporting piece is supported in one steel waist beam.
In the support equipment, in the conventional section assembled prestress well wall support subassembly, the joints of the upper and lower adjacent two assembled steel waist beams are staggered, and the joints of the upper and lower adjacent two assembled corrugated plates are staggered;
in the transition section assembly type prestress well wall supporting subassembly, joints of two assembly type steel waist beams which are adjacent up and down are staggered;
In the shield segment assembly type prestress well wall supporting subassembly, joints of all assembled steel waist beams and assembled corrugated plates at the joint of a supporting dismantling side and a supporting retaining side in a shield segment of an underground vertical shaft are aligned joint arrangement, joints of two assembled steel waist beams adjacent to each other up and down at the rest positions are staggered, and joints of two assembled corrugated plates adjacent to each other up and down at the rest positions are staggered.
It can be known that in the elliptical ring-shaped supporting subassembly of each section of the supporting equipment, the straight plate parts (such as the straight plate sub-beams and the straight plate sub-corrugated plates) can adopt parts with different lengths, so that the effect of adjusting the elliptical ring-shaped length is realized, and the elliptical ring-shaped supporting subassembly can be suitable for different elliptical ring-shaped underground shafts.
In the support equipment, whether in a circular ring structure or an elliptical structure, in the conventional section, the transition section and the shield section assembled prestress well wall support subassembly, each longitudinal connecting piece is connected to webs of six longitudinally-spaced assembled steel waist beams, and preferably, the longitudinal connecting pieces adopt channel steel.
In the supporting equipment, a steel waist beam and a corrugated plate form a supporting structure body, and the height of the supporting structure body is 0.5-0.75 m; the height is better, and the heights of the two can be set to be other heights according to the needs, so long as the convenience of supporting, installing, removing and recycling is ensured.
Embodiments of the present invention are described in detail below.
The embodiment of the invention provides an underground shaft assembling recovery type prestress supporting device which can be used for supporting an underground shaft as a well wall, for example, a shield cutter head is used for repairing the well, and the supporting device comprises the following using steps:
And 1) assembling the prefabricated steel ring beam and the guardrail after the well head ring beam of the manhole is poured. And then erecting a first steel waist beam after earth excavation, connecting the waist beam with a prefabricated steel ring beam by using a connecting piece (such as a bolt), stretching the waist beam by using a pretensioning piece, placing the waist beam in place, bolting the connecting piece with the steel waist beam by using the bolt, and fastening the connection of the steel waist beam with the prefabricated steel ring beam by using the bolt.
And 2) excavating soil after erecting the first steel waist beam, erecting a layer of corrugated plate in time at the excavation depth of 0.5m for each truss, and after connecting the corrugated plate with the first steel waist beam, stretching the corrugated plate by using a pre-tightening piece, fastening and connecting the corrugated plate by using a connecting piece, and bolting the corrugated plate with the first steel waist beam.
And 3) connecting the second steel waist beam with the corrugated plate by using a connecting piece, stretching the steel waist beam by using a pre-tightening piece, placing the pre-tightening piece in place, bolting the connecting piece with the steel waist beam by using a bolt, and fastening and bolting the steel waist beam with the corrugated plate.
Step 4) the subsequent construction process repeats step 2), step 3) and step 4) until the support equipment is supported downhole.
And 5) paving a bottom sealing steel plate at the bottom of the well, paving a plurality of section steel on the bottom sealing steel plate, and fastening and connecting the two ends of the section steel with the lowest section steel waist beam by bolts.
The structure is assembled and supported in the process, and attention is paid to the structure: (1) Filling back filler into the back of the corrugated plate at intervals of 1.5m, 2m or other distances according to stratum conditions; (2) longitudinal connectors are attached every 3 m.
In the supporting equipment, the corrugated plate is adopted, so that grouting is convenient behind the corrugated plate, for example, high polymer materials can be injected behind the corrugated plate at intervals of 1.5m or 2m to fill gaps behind the corrugated plate. And each of four corrugated plates of the single-ring corrugated plate is reserved with one grouting hole, or a field punching mode is adopted.
The support equipment is convenient to support the well wall of the underground shaft in an assembly mode, is convenient to use, can simplify the construction flow of the underground shaft, improves the construction speed, is convenient to recover and recycle after being dismantled after construction is completed, and combines a prestress support technology and a back backfill expansion material mode, so that soil deformation is effectively inhibited, and ground subsidence is reduced.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (11)
1. An underground shaft assembly recovery type prestress supporting device, comprising:
Steel ring beam, assembled prestress well wall supporting component and assembled steel back cover; wherein,
The steel ring beam is of an annular structure matched with a wellhead at the top end of the underground shaft;
the whole shape of the assembled pre-stress well wall supporting component is an annular structure matched with the shape of the inner well wall of the underground shaft;
The assembled pre-stress well wall supporting component is arranged below the steel ring beam, the uppermost end of the assembled pre-stress well wall supporting component is fixedly connected with the steel ring beam, and the assembled pre-stress well wall supporting component is supported on the inner well wall of the underground shaft;
the assembled steel back cover is fixedly connected with the lowest end of the assembled prestress well wall supporting component, and is positioned at the bottom of the underground vertical shaft;
the assembled pre-stress well wall support component comprises: the device comprises a conventional section assembled pre-stress well wall supporting subassembly, a transition section assembled pre-stress well wall supporting subassembly and a shield section assembled pre-stress well wall supporting subassembly;
The conventional section and shield section assembled prestressed well wall supporting subassembly comprises:
the steel waist rail comprises a plurality of spliced steel waist rails, a plurality of spliced corrugated plates and a plurality of longitudinal connecting pieces; wherein,
Each spliced steel waist beam is of an annular structure matched with the shape of the inner well wall of the underground shaft;
each spliced corrugated plate is of an annular structure matched with the shape of the inner wall of the underground shaft;
the spliced steel waist beams and the spliced corrugated plates are arranged in an alternating arrangement mode that one spliced steel waist beam is arranged from top to bottom and is connected with one spliced corrugated plate, and adjacent spliced steel waist beams are fixedly connected with the spliced corrugated plates;
Each longitudinal connecting piece is connected to the inner walls of the plurality of spliced steel waist beams from top to bottom;
the transition section assembled prestressed well wall supporting subassembly comprises:
a plurality of spliced steel waist beams and a plurality of longitudinal connecting pieces; wherein,
Each spliced steel waist beam is of an annular structure matched with the shape of the inner well wall of the underground shaft;
The plurality of spliced steel waist beams are densely distributed from top to bottom, and adjacent spliced steel waist beams are fixedly connected;
Each longitudinal connecting piece is connected to the inner walls of the plurality of spliced steel waist beams from top to bottom.
2. The underground shaft assembly recovery type prestress supporting device according to claim 1, wherein the steel ring beam is formed by welding an annular steel plate and an annular channel steel; the annular channel steel is welded on the edge of an opening of the inner ring of the annular steel plate, and a plurality of bolt holes for connecting the assembled prestress well wall supporting component are distributed at the bottom of the inner side of the annular channel steel;
The assembled steel back cover consists of a back cover steel plate and a plurality of section steels which are densely paved above the back cover steel plate and are respectively connected with the assembled prestress well wall supporting component through connecting pieces;
further comprises: and the back filling material is filled between the assembled prestressed well wall supporting component and the inner well wall of the underground shaft, and the back filling material adopts high polymer filling material.
3. The underground shaft assembly reclamation type prestress support device of claim 1, wherein,
The assembled steel waist beams of the conventional section, the transition section and the shield section assembled prestress well wall supporting subassembly all comprise:
a plurality of arc sub-beams and a plurality of prestress circumferential steel waist beam connectors; wherein,
The plurality of arc-shaped sub beams are connected into a circular ring-shaped structure capable of adjusting prestress in a circumferential direction through the plurality of prestress circumferential steel waist beam connecting pieces;
The assembled corrugated plates of the conventional section and shield section assembled prestressed well wall supporting subassembly all comprise:
the device comprises a plurality of arc-shaped corrugated plates and a plurality of corrugated plate connecting pieces, wherein the head end of each arc-shaped corrugated plate is a connecting hole end, the tail end of each arc-shaped corrugated plate is a strip hole end matched with the connecting hole end, and the plurality of arc-shaped corrugated plates are connected into a circular structure capable of adjusting prestress in a circumferential direction through the plurality of corrugated plate connecting pieces in a head-to-tail end connection mode.
4. The underground shaft assembly recovery type prestress supporting device according to claim 3, wherein in the assembled steel waist beam, each prestress circumferential steel waist beam connecting piece adopts a sleeve box structure with adjustable length, the sleeve box structure is provided with a long strip-shaped connecting hole, the end part of each arc-shaped sub beam is provided with a long strip-shaped connecting hole, and a plurality of parallel long strip-shaped connecting holes of each arc-shaped sub beam are matched with a plurality of parallel long strip-shaped connecting holes of the prestress circumferential steel waist beam connecting piece;
In the spliced corrugated plate, a plurality of rows of connecting holes which are arranged in parallel from top to bottom are formed in the connecting hole end of the head end of each arc-shaped corrugated plate, each row of connecting holes comprises a plurality of connecting holes which are arranged at intervals, and a plurality of strip-shaped holes which are arranged in parallel from top to bottom are formed in the strip-shaped hole end of the tail end of each arc-shaped corrugated plate; the head and tail ends of each arc-shaped corrugated board are provided with rib plates, and the two ends of each rib plate are respectively provided with jack clamping grooves.
5. The underground shaft assembly reclamation type prestress support as recited in claim 3 or 4, wherein,
In the spliced steel waist beam of the conventional section and transition section assembled prestress well wall supporting sub-assembly, a plurality of arc-shaped sub-beams are three arc-shaped sub-beams which can be spliced into a circular ring structure; the number of the prestress circumferential steel waist beam connectors is three;
In the assembled corrugated plate of the conventional section assembled prestressed well wall supporting subassembly, the plurality of arc-shaped corrugated plates are three arc-shaped corrugated plates which can be assembled into a circular structure; bolts are adopted for the plurality of corrugated plate connectors;
in the spliced steel waist beam of the shield segment assembly type prestress well wall supporting sub-assembly, a plurality of arc-shaped sub-beams are four arc-shaped sub-beams which can be spliced into a circular ring structure; four prestress circumferential steel waist beam connectors are provided;
in the spliced corrugated plate of the shield segment assembly type prestress well wall supporting subassembly, the plurality of arc-shaped corrugated plates are four arc-shaped corrugated plates which can be spliced into a circular structure; four corrugated plate connectors are provided.
6. The underground shaft assembly reclamation type prestress support as recited in claim 1, 3 or 4, wherein,
In the conventional section assembly type prestress well wall supporting subassembly, joints of two upper and lower adjacent spliced steel waist beams are staggered, and joints of two upper and lower adjacent spliced corrugated plates are staggered;
in the transition section assembly type prestress well wall supporting subassembly, joints of two assembly type steel waist beams which are adjacent up and down are staggered;
In the shield segment assembly type prestress well wall supporting subassembly, joints of all assembled steel waist beams and assembled corrugated plates at the joint of a supporting dismantling side and a supporting retaining side in a shield segment of an underground vertical shaft are aligned joint arrangement, joints of two assembled steel waist beams adjacent to each other up and down at the rest positions are staggered, and joints of two assembled corrugated plates adjacent to each other up and down at the rest positions are staggered.
7. The underground shaft assembly recovery type prestress supporting equipment of claim 6, wherein,
The assembled steel waist beams of the conventional section, the transition section and the shield section assembled prestress well wall supporting subassembly all comprise:
The steel waist beam comprises a plurality of arc-shaped sub-beams, a plurality of straight sub-beams and a plurality of prestress annular steel waist beam connecting pieces; wherein,
The plurality of arc-shaped sub-beams and the plurality of straight plate sub-beams are connected into an elliptical ring structure capable of adjusting prestress in a circumferential direction through the plurality of prestress circumferential steel waist beam connecting pieces;
The assembled corrugated plates of the conventional section and shield section assembled prestressed well wall supporting subassembly all comprise:
The device comprises a plurality of arc-shaped corrugated plates, a plurality of straight corrugated plates and a plurality of corrugated plate connecting pieces, wherein the head end of each corrugated plate is a connecting hole end, the tail end of each corrugated plate is a strip hole end matched with the strip hole end, and the plurality of arc-shaped corrugated plates and the plurality of straight corrugated plates are connected in an end-to-end mode through the plurality of corrugated plate connecting pieces to form an elliptical ring structure capable of circumferentially adjusting prestress.
8. The underground shaft assembly reclamation type prestress support as recited in claim 7, wherein,
In the spliced steel waist beam, each prestress circumferential steel waist beam connecting piece adopts a sleeve box structure with adjustable length, the sleeve box structure is provided with long strip-shaped connecting holes, the end parts of each arc-shaped sub beam and the end parts of each straight sub beam are provided with long strip-shaped connecting holes, and a plurality of parallel long strip-shaped connecting holes of each arc-shaped sub beam and a plurality of parallel long strip-shaped connecting holes of each straight sub beam are matched with the plurality of parallel long strip-shaped connecting holes of the prestress circumferential steel waist beam connecting piece;
In the spliced corrugated plate, a plurality of rows of connecting holes which are arranged in parallel from top to bottom are formed in the connecting hole end of the head end of each corrugated plate, each row of connecting holes comprises a plurality of connecting holes which are arranged at intervals, and a plurality of strip-shaped holes which are arranged in parallel from top to bottom are formed in the strip-shaped hole end of the tail end of each corrugated plate; the head and tail ends of each wavelet board are provided with rib plates, and the two ends of each rib plate are respectively provided with jack clamping grooves.
9. The underground shaft assembly recovery type prestress supporting device according to claim 8, wherein in the spliced steel waist beam, a plurality of arc-shaped sub beams are six arc-shaped sub beams which can be spliced into two semicircular ring structures; the plurality of straight plate sub-beams are two straight plate sub-beams which are connected in parallel between the two semicircular ring structures; two prestress annular steel waist beam connectors are provided;
In the spliced corrugated plate, a plurality of arc-shaped corrugated plates are six arc-shaped corrugated plates which can be spliced into two semicircular structures; the plurality of straight plate corrugated plates are two straight plate corrugated plates which are connected in parallel between the two semicircular ring structures formed by the plurality of arc-shaped corrugated plates; bolts are used for the corrugated plate connectors.
10. The underground shaft assembly reclamation type prestress support apparatus of claim 9, further comprising:
and the two ends of the inner supporting piece are respectively connected with the two opposite straight plate sub-beams, and are supported between the two opposite straight plate sub-beams.
11. The underground shaft assembly recovery type prestress supporting device according to claim 1, wherein in the conventional section assembly type prestress shaft wall supporting subassembly, joints of two upper and lower adjacent spliced steel waist beams are staggered, and joints of two upper and lower adjacent spliced corrugated plates are staggered;
in the transition section assembly type prestress well wall supporting subassembly, joints of two assembly type steel waist beams which are adjacent up and down are staggered;
In the shield segment assembly type prestress well wall supporting subassembly, joints of all assembled steel waist beams and assembled corrugated plates at the joint of a supporting dismantling side and a supporting retaining side in a shield segment of an underground vertical shaft are aligned joint arrangement, joints of two assembled steel waist beams adjacent to each other up and down at the rest positions are staggered, and joints of two assembled corrugated plates adjacent to each other up and down at the rest positions are staggered.
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| CN110259454B (en) * | 2019-07-16 | 2024-03-22 | 西南交通大学 | Detachable steel corrugated plate enclosure wall and corresponding construction method |
| CN110671114B (en) * | 2019-11-01 | 2024-05-03 | 中国地质大学（北京） | Recovery type round vertical shaft supporting device and method |
| CN111963174A (en) * | 2020-07-08 | 2020-11-20 | 淮北矿业股份有限公司 | Process for repairing coal chute hole by open caisson method |
| CN112502714B (en) * | 2020-10-27 | 2022-12-06 | 中建三局基础设施建设投资有限公司 | Assembled shaft barrel structure and design and construction method |
| CN112302052B (en) * | 2020-11-06 | 2022-06-24 | 中铁工程装备集团有限公司 | Vertical shaft construction system and construction method thereof |
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