CN108397198A - Assembly recovery type prestressing force branch protecting assembly for underground shaft - Google Patents
Assembly recovery type prestressing force branch protecting assembly for underground shaft Download PDFInfo
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- CN108397198A CN108397198A CN201810469445.2A CN201810469445A CN108397198A CN 108397198 A CN108397198 A CN 108397198A CN 201810469445 A CN201810469445 A CN 201810469445A CN 108397198 A CN108397198 A CN 108397198A
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- 238000011084 recovery Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 153
- 239000010959 steel Substances 0.000 claims abstract description 153
- 238000010276 construction Methods 0.000 claims abstract description 31
- 238000004064 recycling Methods 0.000 claims abstract 2
- 239000002689 soil Substances 0.000 abstract description 8
- 238000007747 plating Methods 0.000 abstract 5
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect 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
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004080 punching 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
- E21D7/00—Shaft equipment, e.g. timbering within the shaft
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of assembly recovery type prestressing force branch protecting assemblies for underground shaft, including：Multiple assembling type steel waist rails, multiple pin-connected panel corrugated platings and multiple longitudinal connecting members；Wherein, each assembling type steel waist rail is and the matched loop configuration of borehole wall shape in the underground shaft；Each pin-connected panel corrugated plating is and the matched loop configuration of borehole wall shape in the underground shaft；The arrangement that the multiple assembling type steel waist rail and multiple pin-connected panel corrugated platings are connect one layer of pin-connected panel corrugated plating by assembling type steel waist rail together with being arranged alternately from top to bottom is arranged, and adjacent assembling type steel waist rail is fixedly connected with pin-connected panel corrugated plating；Each longitudinal connecting member is connected to from top to bottom on multiple assembling type steel waist rail inner walls.Recycling is convenient in the branch protecting assembly use convenient for assembly after use, pollution-free to the soil body, does not influence Other Engineering, and lifting construction efficiency reduces construction cost.
Description
Technical Field
The invention relates to the field of shaft support, in particular to an assembly recovery type prestress support assembly for an underground shaft.
Background
In the construction of tunnels, subways and the like at present, a shield technology is required. In the existing shield construction, a shield cutter head needs to be overhauled in the construction process, the shield cutter head is overhauled, and at present, maintenance wells, namely vertical wells, are arranged on an excavated route at intervals. However, some shield maintenance well projects, such as urban subway projects, have the characteristics of limited construction site, dense peripheral pipelines, high ground surface settlement control requirement, short construction period and the like. The existing overhaul well construction mostly adopts manual hole digging piles or anchor spraying reverse-construction vertical shafts, and the manual hole digging process has the problems of narrow operation space, unreliable retaining wall quality, large potential safety hazard and the like; the anchor spraying reverse construction method has the defects of large dust emission and heavy pollution in anchor spraying construction, various construction mechanical equipment, large influence of anchor spraying operation on the construction speed and the like; the retaining wall structure of the manhole is structurally stressed after the soil body deforms, is in a passive stress state, is easy to cause surface subsidence, and is very unfavorable for construction in cities with high requirements on subsidence. Therefore, the inventor finds that how to safely, efficiently and pollution-free complete the well wall support in the shield cutter head overhaul well construction under the construction environment with a large number of engineering adjacent risk sources is the problem to be solved.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide an assembly and recovery type prestressed supporting component for an underground vertical shaft, which can be used as a support for the wall of the underground vertical shaft, is convenient to assemble and use on a construction site, is convenient to recover and recycle after use, has no residue in soil, cannot cause pollution, ensures construction safety, effectively reduces the settlement of the peripheral earth surface, reduces the construction cost and shortens the construction time.
The purpose of the invention is realized by the following technical scheme:
the embodiment of the invention provides an assembly recovery type prestressed supporting assembly for an underground shaft, which comprises:
the connecting structure comprises a plurality of assembled steel waist beams, a plurality of assembled corrugated plates and a plurality of longitudinal connecting pieces; wherein,
each assembled steel waist beam is of an annular structure matched with the shape of the inner well wall of the underground vertical well;
each assembled corrugated plate is of an annular structure matched with the shape of the inner well wall of the underground shaft;
the assembled steel waist beams and the assembled corrugated plates are arranged in an arrangement mode that one assembled steel waist beam is connected with one assembled corrugated plate from top to bottom in an alternating mode, and the adjacent assembled steel waist beams are fixedly connected with the assembled corrugated plates;
each longitudinal connecting piece is connected to the inner walls of the assembled steel waist beams from top to bottom.
According to the technical scheme provided by the invention, the assembling and recovering type prestress supporting component for the underground vertical shaft, which is provided by the embodiment of the invention, has the beneficial effects that:
the annular prestress supporting structure is formed by arranging the plurality of assembled steel waist beams, the plurality of assembled corrugated plates and the plurality of longitudinal connecting pieces, and can be used for carrying out annular supporting on the wall of the underground shaft; the prefabricated structure is provided with the strip holes in different directions and sizes, so that the effective connection among the structures is effectively guaranteed, and the safety of the structure is improved; the supporting component is prefabricated in a factory mode due to the fact that the assembly type structure is convenient to use, is assembled on site, is convenient to use in a supporting mode during construction, can be recycled after being used, improves the efficiency of underground shaft construction, reduces environmental pollution and reduces construction cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic sectional view of an assembled retractable prestressed supporting construction assembly for an underground shaft according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an assembled steel waist beam of a conventional segment-assembled recycled prestressed supporting assembly according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an arc-shaped sub-beam of the assembled steel wale of the conventional segment-assembled recycled prestressed supporting assembly according to the embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along line D-D of FIG. 3;
FIG. 5 is a schematic cross-sectional view taken along line E-E in FIG. 3;
FIG. 6 is an enlarged schematic view of FIG. 3 at F;
FIG. 7 is a schematic sectional view taken along line F1-F1 in FIG. 6;
fig. 8 is a schematic structural view of a prestressed circumferential steel wale connecting member of an assembled steel wale of a conventional segment-assembled recycled prestressed supporting assembly according to an embodiment of the present invention;
FIG. 9 is a schematic sectional view taken along line G-G in FIG. 8;
FIG. 10 is a schematic sectional view taken along line H-H in FIG. 8;
fig. 11 is a schematic diagram illustrating a prestress adjusting connection state of an assembled steel wale of a conventional segment-assembled recycled prestress support assembly according to an embodiment of the present invention;
fig. 12 is a schematic diagram illustrating a prestress adjustment state of an assembled steel wale of a conventional segment-assembled recycled prestress support assembly according to an embodiment of the present invention;
FIG. 13 is a schematic view of a longitudinal connecting member for connecting the assembled steel waist rail according to the embodiment of the present invention;
fig. 14 is a schematic structural view of a assembled corrugated plate of a conventional segment-assembled recycled prestressed supporting assembly according to an embodiment of the present invention;
fig. 15 is a schematic structural view of an arc-shaped corrugated plate of a assembled corrugated plate of a conventional segment assembled recycled prestressed supporting assembly according to an embodiment of the present invention;
FIG. 16 is an enlarged view at I in FIG. 15;
fig. 17 is a schematic structural view of an arc-shaped corrugated plate of a spliced corrugated plate of a conventional segment assembled and recycled prestressed supporting assembly according to an embodiment of the present invention;
fig. 18 is a schematic plan view illustrating a conventional segment assembled recycled prestressed supporting component assembled corrugated plate according to an embodiment of the present invention;
FIG. 19 is a schematic sectional view taken along line J-J in FIG. 18;
FIG. 20 is a schematic cross-sectional view taken at K-K in FIG. 18;
fig. 21 is a schematic structural view of an assembled steel wale of a shield segment assembled support assembly according to an embodiment of the present invention;
fig. 22 is a schematic structural view of an oval ring-shaped assembled steel wale according to an embodiment of the present invention;
in fig. 1: 1-steel ring beam; 2-assembling type steel waist beam; 3-assembled corrugated plate; 4-longitudinal connectors; 5-back filling material; 6-steel back cover;
in fig. 2 to 7: 21-a first arc-shaped sub-beam; 22-a second arc-shaped sub-beam; 23-a third arc-shaped sub-beam; 24-a first hoop prestressed steel wale connecting piece; 25-a second annular prestressed steel wale connecting piece; 26-a third annular prestress steel waist beam connecting piece; 221-elongated bolt holes; 222-cutting the opening; 223-shear resistant; 224-bolt holes; 225-bracket; 27-wedge block;
in fig. 8 to 12: 241-bolt; 24-a first hoop prestressed steel wale connecting piece; 223-shear resistant; 225-bracket; 27-wedge block; 7-a jack;
in fig. 13: 2-assembling type steel waist beam; 4-longitudinal connectors;
in fig. 14 to 20: 31-a first arc shaped sub-corrugated board; 32-a second arc sub-corrugated board; 33-a third arc sub-corrugated board; 320-a strip connection hole; 321-elongate hole ends; 322-connecting the pore ends; 323-adding ribbed plates at the ends of the strip holes; 324-long strip hole end jack slot; 325-adding ribbed plates at the ends of the connecting holes; 326-connecting hole end jack slot; 7-a jack;
in fig. 21: 311-a first arc shaped sub-beam; 312-a second arc-shaped sub-beam; 313-a third arc sub-beam; 314-a fourth arc-shaped sub-beam; 315-a first hoop prestressed steel wale connecting piece; 316-a second annular prestressed steel wale connecting piece; 317-a third annular prestress steel waist beam connecting piece; 318-a fourth circumferential prestress steel wale connecting piece;
in fig. 22: 41. 42, 43, 44, 45 and 46 are respectively a first, a second, a third, a fourth, a fifth and a sixth arc-shaped sub-beam; 47 and 48 are the first and second straight plate sub-beams, respectively; 49. 410, 411, 412, 413 and 414 are respectively a first, a second, a third, a fourth, a fifth and a sixth prestressed circular steel wale connecting piece; 415-an inner support; 416 and 417 are first and second inner support connections, respectively.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the specific contents of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides an assembled and recycled prestressed support assembly for an underground shaft, which can be used in construction of an underground shaft such as a shield cutter head manhole, and is particularly suitable for wall support of a conventional section and a shield section of a shield cutter head manhole, and includes:
the connecting structure comprises a plurality of assembled steel waist beams, a plurality of assembled corrugated plates and a plurality of longitudinal connecting pieces; wherein,
each assembled steel waist beam is of an annular structure matched with the shape of the inner well wall of the underground vertical well;
each assembled corrugated plate is of an annular structure matched with the shape of the inner well wall of the underground shaft;
the assembled steel waist beams and the assembled corrugated plates are arranged in an arrangement mode that one assembled steel waist beam is connected with one assembled corrugated plate from top to bottom in an alternating mode, and the adjacent assembled steel waist beams are fixedly connected with the assembled corrugated plates;
each longitudinal connecting piece is connected to the inner walls of the assembled steel waist beams from top to bottom.
The support assembly further comprises: fill behind one's back the subassembly is strutted to assembled prestressing force wall of a well with between the wall of a well in the underground shaft, behind one's back the stopping adopts the high molecular polymer filler, sets up behind one's back the filler and enables this strut the better and the wall of a well laminating of underground shaft of subassembly, reaches better support nature.
As shown in fig. 2 to 12, in the support assembly, the assembled steel waist rail includes: a plurality of arc-shaped sub-beams and a plurality of prestressed circumferential steel waist beam connecting pieces; wherein,
the arc-shaped sub-beams are connected into a circular structure capable of adjusting prestress in a circumferential direction through the prestress circumferential steel waist beam connecting pieces (fig. 2 shows an assembled steel waist beam with a circular structure, and can also be an assembled steel waist beam with an elliptical ring structure, and the assembled steel waist beam can be matched with the shape of the well wall of the underground shaft); preferably, each arc subbeam adopts the cross section to make for square side's pipe, evenly set up rectangular bolt hole respectively at the upper and lower surface of square pipe, conveniently connect the parts (like steel ring roof beam, pin-connected panel buckled plate) of pin-connected panel steel waist rail upper and lower side, the square inboard side that corresponds the department at rectangular bolt hole is equipped with the cutting opening, the cutting opening is got rid of a square intraductal lateral wall by the cutting and is formed, 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. 3 to 5). Brackets are welded at the end parts of the arc-shaped sub-beams and used for placing a jack for applying hoop prestress; wedge blocks are arranged in the end parts of the arc-shaped sub-beams and used for fixing the steel waist beam after prestress is applied to prevent the force from loosening; the inner side of each arc-shaped sub-beam is provided with shear resistant ribs for increasing the strength. Bolt holes are reserved at the end parts of the arc-shaped sub-beams and used for connecting and fixing the prestress annular steel waist beam connecting piece of the steel waist beam.
The pin-connected panel buckled plate includes: the corrugated plate comprises a plurality of arc-shaped sub-corrugated plates and a plurality of corrugated plate connecting pieces, wherein the head end of each arc-shaped sub-corrugated plate is a connecting hole end, the tail end of each arc-shaped sub-corrugated plate is a long strip hole end matched with the connecting hole end, and the plurality of arc-shaped sub-corrugated plates are connected into a circular ring structure capable of adjusting prestress in the circumferential direction through the plurality of corrugated plate connecting pieces in a head-tail end connection mode (the shape is shown in figure 14). When the corrugated plate is used, each sub-corrugated plate needs to be fixed by a corrugated plate connecting piece (which can be a bolt) after being pre-tightened, and preferably the corrugated plate is pre-tightened by a jack.
The two side edges of each arc-shaped sub corrugated plate except the head end and the tail end are respectively provided with a transverse connecting side edge, and a plurality of strip-shaped connecting holes are uniformly distributed on the connecting side edges, so that the connecting plates are conveniently connected with the upper assembled steel waist beam and the lower assembled steel waist beam (see fig. 17 to 19).
As shown in fig. 8 to 10, in the assembled steel waist rail of the support assembly, each prestressed ring-to-steel waist rail connecting member adopts a sleeve structure capable of adjusting the length, preferably a variable-length sleeve structure, the sleeve structure is provided with elongated connecting holes, the end part of each arc-shaped sub-beam is provided with an elongated connecting hole, and a plurality of parallel elongated connecting holes of each arc-shaped sub-beam are matched with a plurality of parallel elongated connecting holes of the prestressed ring-to-steel waist rail connecting member; the split mounting type steel waist beam with the structure has the advantages that each sub-beam is conveniently pre-tightened by the jack and then fixed into a ring by adopting the prestressed annular steel waist beam connecting piece.
As shown in fig. 14 to 20, in the assembled corrugated plate of the support assembly, a plurality of rows of connecting holes are formed in parallel from top to bottom at the connecting hole end of the head end of each arc-shaped corrugated plate, each row of connecting holes includes a plurality of connecting holes arranged at intervals, and a plurality of elongated holes are formed in parallel from top to bottom at the elongated hole end of the tail end of each arc-shaped corrugated plate; ribbed plates are arranged at the head end and the tail end of each arc-shaped sub-corrugated plate, jack clamping grooves are formed in the two ends of each ribbed plate respectively, a jack can be conveniently arranged between the two connected sub-corrugated plates, and prestress adjustment is achieved. The sub corrugated plates in the structural form are convenient to connect and can be subjected to prestress adjustment.
In the assembled steel waist beam of the support assembly, the plurality of arc-shaped sub-beams are three arc-shaped sub-beams which can be assembled into a circular ring structure; three prestressed circumferential steel wale connecting pieces (see fig. 2);
or in the assembled steel waist beam of the support assembly, the plurality of arc-shaped sub-beams are four arc-shaped sub-beams which can be assembled into a circular ring structure; the number of the prestressed circumferential steel waist beam connecting pieces is four (see figure 21), and the assembled steel waist beam is suitable for supporting the wall of the shield section of the inspection well;
in the assembled corrugated plate of the supporting assembly, a plurality of arc-shaped sub-corrugated plates are four arc-shaped sub-corrugated plates which can be assembled into a circular structure by beams; the number of the corrugated plate connecting pieces is four (not shown in the figure, but is similar to the assembled steel waist beam structure shown in the figure 21), and the assembled corrugated plate is suitable for the shield section well wall support of the maintenance well.
Above-mentioned pin-connected panel steel waist rail and pin-connected panel buckled plate of this kind of structure when the shield section uses be in the shield section of secret shaft in strut demolish the side and strut and keep the whole pin-connected panel steel waist rail of the junction of side and the seam of pin-connected panel buckled plate and be the neat seam setting of alignment, demolish the sub-roof beam of the part of the pin-connected panel steel waist rail of supporting the subassembly and the sub-buckled plate of the part of pin-connected panel buckled plate when the soil body of being convenient for is backfilled.
In the support assembly, the joints of two vertically adjacent assembled steel waist beams are arranged in a staggered manner, and the joints of two vertically adjacent assembled corrugated plates are arranged in a staggered manner;
the stability of strutting is promoted to the mode that the setting was staggered of above-mentioned seam.
Above-mentioned supporting component the shield of underground shaft is in strutting in the section of protecting the shield and demolishs the side and strut all pin-connected panel steel waist rail and the equal seam of pin-connected panel buckled plate that remain the junction of side and be the neat seam setting of alignment, when the soil body of being convenient for backfills, demolishs partial steel waist rail and buckled plate, and the setting of staggering of the seam of two pin-connected panel steel waist rails about all the other positions, the setting of staggering of the seam of two pin-connected panel buckled plates about all the other positions.
The above description is about the fabricated prestressed shaft wall supporting assembly of the present invention by taking a circular ring structure as an example, and the supporting assembly of the structure is suitable for use in the construction of a circular underground shaft.
The supporting assembly is suitable for supporting the conventional section of a shield cutter head overhaul well and the wall of a shield section well, is particularly suitable for supporting a circular underground shaft, and is strong in supporting force through the cooperation of the assembly type steel waist beam and the assembly type corrugated plate which are alternately arranged, and a back filler can be filled behind the assembly type corrugated plate, so that a supporting structure with the effect of attaching the supporting assembly and the wall of the well is improved.
Fig. 22 illustrates an oval assembled steel waist rail for use in an oval assembled prestressed shaft lining support assembly, specifically, the assembled steel waist rail includes: the prestressed ring-shaped steel waist beam comprises a plurality of arc-shaped sub beams, a plurality of straight plate sub beams and a plurality of prestressed ring-shaped steel waist beam connecting pieces; wherein,
the arc-shaped sub-beams and the straight plate sub-beams are connected into an elliptical annular structure capable of adjusting prestress in an annular mode through the prestress annular steel waist beam connecting pieces; preferably, each arc subbeam and each straight plate subbeam all adopt the cross section to make for square side's pipe, on square pipe, the lower surface evenly sets up rectangular bolt hole respectively, conveniently connect the parts (like the steel ring roof beam, the pin-connected panel buckled plate) of pin-connected panel steel waist rail upper and lower side, the side inboard side of managing that corresponds the department at rectangular bolt hole is equipped with the cutting opening, the cutting opening is got rid of a square intraductal lateral wall by the cutting and is formed, the cutting opening is corresponding 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 (can see fig. 3 to 5). The other structures of the arc-shaped sub-beams and the straight plate sub-beams are basically the same as those of the sub-beams of the assembled steel waist beam of the annular supporting assembly, and are not repeated here.
The pin-connected panel buckled plate all includes: the head end of each sub corrugated plate is a connecting hole end, the tail end is a long strip hole end matched with the long strip hole end, and the plurality of arc sub corrugated plates and the plurality of straight sub corrugated plates are connected into an elliptical ring structure capable of adjusting prestress in the ring direction through the plurality of corrugated plate connecting pieces in a mode that the head end and the tail end are connected.
The two side edges of each arc-shaped sub corrugated plate and each straight sub corrugated plate except the head end and the tail end are respectively provided with a transverse connecting side edge, and a plurality of strip-shaped connecting holes are uniformly distributed on the connecting side edges, so that the connecting plates are conveniently connected with the upper assembled steel waist beam and the lower assembled steel waist beam (see fig. 17 to 19).
In the assembled steel waist beam of the support assembly, each prestress annular steel waist beam connecting piece adopts a sleeve box structure with adjustable length, the sleeve box structure is provided with elongated connecting holes, the end part of each arc-shaped sub beam and the end part of each straight plate beam are provided with elongated connecting holes, and a plurality of parallel elongated connecting holes of each arc-shaped sub beam and a plurality of parallel elongated connecting holes of each straight plate beam are matched with a plurality of parallel elongated connecting holes of the prestress annular steel waist beam connecting piece;
in the assembled corrugated plate, a plurality of rows of connecting holes are arranged in parallel from top to bottom at the connecting hole end of the head end of each sub corrugated plate, each row of connecting holes comprises a plurality of connecting holes arranged at intervals, and a plurality of strip-shaped holes are arranged in parallel from top to bottom at the strip hole end of the tail end of each sub corrugated plate; ribbed plates are arranged at the head end and the tail end of each sub-corrugated plate, and jack clamping grooves are respectively arranged at the two ends of each ribbed plate.
In the support assembly, the plurality of arc-shaped sub-beams are six arc-shaped sub-beams which can be assembled into two semicircular structures; the plurality of straight plate sub-beams are two straight plate sub-beams which are connected between the two semicircular ring structures in parallel; two prestressed circumferential steel waist beam connecting pieces are provided;
in the assembled corrugated plate, a plurality of arc-shaped sub corrugated plates are six arc-shaped sub corrugated plates which can be assembled into two semicircular structures; the plurality of straight sub corrugated plates are two straight sub corrugated plates which are connected in parallel between the two semicircular ring structures formed by the plurality of arc sub corrugated plates; the corrugated plate connecting pieces are all bolts.
In the assembled steel waist beam, each prestress annular steel waist beam connecting piece adopts a sleeve box structure with adjustable length, the sleeve box structure is provided with elongated connecting holes, the end part of each arc-shaped sub beam and the end part of each straight plate sub beam are respectively provided with an elongated connecting hole, and a plurality of parallel elongated connecting holes of each arc-shaped sub beam and a plurality of parallel elongated connecting holes of each straight plate sub beam are matched with a plurality of parallel elongated connecting holes of the prestress annular steel waist beam connecting piece;
in the assembled corrugated plate, a plurality of rows of connecting holes are arranged in parallel from top to bottom at the connecting hole end of the head end of each sub corrugated plate (namely each arc sub corrugated plate and each straight sub corrugated plate), each row of connecting holes comprises a plurality of connecting holes arranged at intervals, and a plurality of strip-shaped holes are arranged in parallel from top to bottom at the strip hole end of the tail end of each sub corrugated plate; ribbed plates are arranged at the head end and the tail end of each sub-corrugated plate, jack clamping grooves are formed in the two ends of each ribbed plate respectively, a jack can be conveniently arranged between the two connected sub-corrugated plates, and prestress adjustment is achieved. The sub corrugated plates in the structural form are convenient to connect and can be subjected to prestress adjustment.
The support assembly further comprises: and two ends of the inner supporting piece are respectively connected with the two straight plate sub-beams which are arranged oppositely, and the inner supporting piece is supported between the two opposite straight plate sub-beams. The assembled steel waist rail is convenient for tightly supporting the oval annular supporting assembly from inside, a plurality of inner supporting pieces are arranged, and each inner supporting piece is supported in one steel waist rail.
In the support assembly, the joints of two vertically adjacent assembled steel waist beams are arranged in a staggered manner, and the joints of two vertically adjacent assembled corrugated plates are arranged in a staggered manner;
or,
above-mentioned supporting component the shield of underground shaft is in strutting in the section of protecting the shield and demolishs the side and strut all pin-connected panel steel waist rail and the equal seam of pin-connected panel buckled plate that remain the junction of side and be the neat seam setting of alignment, when the soil body of being convenient for backfills, demolishs partial steel waist rail and buckled plate, and the setting of staggering of the seam of two pin-connected panel steel waist rails about all the other positions, the setting of staggering of the seam of two pin-connected panel buckled plates about all the other positions.
The supporting assembly is suitable for supporting the conventional section of a shield cutter head overhaul well and the wall of a shield section well, is particularly suitable for supporting a circular underground shaft, and is strong in supporting force through the cooperation of the assembly type steel waist beam and the assembly type corrugated plate which are alternately arranged, and a back filler can be filled behind the assembly type corrugated plate, so that a supporting structure with the effect of attaching the supporting assembly and the wall of the well is improved.
It can be known that in the above-mentioned elliptical ring supporting assembly, 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 as to realize the effect of adjusting the length of the elliptical ring and adapt to different elliptical ring underground shafts.
Above-mentioned strut subassembly, no matter be ring structure or oval ring structure in, every longitudinal connecting piece is connected on the web of six pin-connected panel steel waist girders of vertical interval, and preferred, longitudinal connecting piece adopts the channel-section steel.
In the supporting assembly, one steel waist beam and one corrugated plate form a supporting structure body, and the height of the supporting structure body is 0.5-0.75 m; it can be known that the height is better, and the height of the two can be set to be other heights according to the needs, as long as the convenience of supporting, mounting, dismounting and recovering is ensured.
The embodiments of the present invention are described in further detail below.
The embodiment of the invention provides an assembly recovery type prestress supporting assembly for an underground shaft, which can be used for supporting the underground shaft as a well wall, for example, a shield cutter head manhole is taken as an example, and the supporting assembly comprises the following use steps:
step 1) after the well mouth ring beam of the maintenance well is poured, assembling the steel ring beam and the well mouth guard bar. And then, excavating earth, erecting a first steel waist beam (namely an assembled steel waist beam, which is simply called as a steel waist beam after the description is convenient), connecting the waist beam with the steel ring beam by using a connecting piece (such as a bolt), opening the steel waist beam by using a prefastening piece, placing the steel 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 steel ring beam by using the bolt.
Step 2) after erecting the first steel waist beam, excavating a soil body, wherein the excavation depth of each steel waist beam is 0.5m, erecting a layer of corrugated plate (namely, an assembled corrugated plate, which is referred to as a corrugated plate for convenience in description), connecting the corrugated plate with the first steel waist beam, then opening the corrugated plate by using a prefastening piece, fastening 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, opening the steel waist beam by using a pre-tightening piece and placing the pre-tightening piece in place, bolting the connecting piece with the steel waist beam by using bolts, and fastening and bolting the steel waist beam with the corrugated plate.
And 4) repeating the step 2), the step 3) and the step 4) in the subsequent construction process until the support assembly is supported to the bottom of the well.
And 5) laying a bottom sealing steel plate at the bottom of the well, densely laying a plurality of section steels on the bottom sealing steel plate, and fastening and connecting two ends of the plurality of section steels and the lowest steel waist beam by bolts.
What need be noticed among the supporting process is assembled to above-mentioned structure is: (1) back filling is injected at intervals (which can be 1.5m, 2m or other distances) behind the corrugated plate according to stratum conditions; (2) longitudinal connectors are connected every 3 m.
In the support assembly, the corrugated plate is adopted, so that grouting is convenient to be performed on the back of the corrugated plate, and if the high polymer material can be injected once at intervals of 1.5m or 2m on the back of the corrugated plate, gaps on the back of the corrugated plate are filled. And (3) reserving a grouting hole on each of four corrugated plates of the single-ring corrugated plate, or adopting a field punching mode.
The support assembly of the invention is convenient for supporting the wall of the underground shaft in an assembly mode, is convenient to use, can simplify the construction process of the underground shaft, improves the construction speed, is convenient to dismantle and recycle after the construction is finished, and combines the prestress support technology and the mode of backfilling an expansive material at the back, thereby effectively inhibiting the deformation of a soil body and reducing the ground settlement.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An assembled retrieval prestressed bracing assembly for an underground shaft, comprising:
the connecting structure comprises a plurality of assembled steel waist beams, a plurality of assembled corrugated plates and a plurality of longitudinal connecting pieces; wherein,
each assembled steel waist beam is of an annular structure matched with the shape of the inner well wall of the underground vertical well;
each assembled corrugated plate is of an annular structure matched with the shape of the inner well wall of the underground shaft;
the assembled steel waist beams and the assembled corrugated plates are arranged in an arrangement mode that one assembled steel waist beam is connected with one assembled corrugated plate from top to bottom in an alternating mode, and the adjacent assembled steel waist beams are fixedly connected with the assembled corrugated plates;
each longitudinal connecting piece is connected to the inner walls of the assembled steel waist beams from top to bottom.
2. The rigging recovery prestressed support assembly for an underground shaft according to claim 1, wherein the sectional type waist rail comprises: a plurality of arc-shaped sub-beams and a plurality of prestressed circumferential steel waist beam connecting pieces; wherein,
the arc-shaped sub-beams are connected into a circular structure capable of adjusting prestress in the circumferential direction through the prestress circumferential steel waist beam connecting pieces;
the pin-connected panel buckled plate includes: the novel corrugated plate comprises a plurality of arc-shaped sub-corrugated plates and a plurality of corrugated plate connecting pieces, wherein the head end of each arc-shaped sub-corrugated plate is a connecting hole end, the tail end of each arc-shaped sub-corrugated plate is a long strip hole end matched with the connecting hole end, and the plurality of arc-shaped sub-corrugated plates are connected into a circular ring structure capable of adjusting prestress in the ring direction through the plurality of corrugated plate connecting pieces in a head-tail end connection mode.
3. The assembly recovery type prestressed supporting assembly for the underground shaft according to claim 2, wherein in the assembled steel wale, each prestressed ring-to-steel wale connecting member adopts a sleeve structure with adjustable length, the sleeve structure is provided with an elongated connecting hole, the end part of each arc-shaped sub-beam is provided with an elongated connecting hole, and a plurality of parallel elongated connecting holes of each arc-shaped sub-beam are matched with a plurality of parallel elongated connecting holes of the prestressed ring-to-steel wale connecting member;
in the assembled corrugated plate, a plurality of rows of connecting holes are arranged in parallel from top to bottom at the connecting hole end of the head end of each arc-shaped sub corrugated plate, each row of connecting holes comprises a plurality of connecting holes arranged at intervals, and a plurality of strip-shaped holes are arranged in parallel from top to bottom at the strip hole end of the tail end of each arc-shaped sub corrugated plate; ribbed plates are arranged at the head end and the tail end of each arc-shaped sub-corrugated plate, and jack clamping grooves are respectively arranged at the two ends of each ribbed plate.
4. The fabricated retrieval type prestressed supporting construction assembly for an underground shaft according to claim 2 or 3, wherein,
in the assembled steel waist beam, a plurality of arc-shaped sub-beams are three arc-shaped sub-beams which can be assembled into a circular structure; three prestressed circumferential steel waist beam connecting pieces are provided;
in the assembled corrugated plate, a plurality of arc-shaped sub corrugated plates are three arc-shaped sub corrugated plates which can be assembled into a circular structure; the plurality of corrugated plate connecting pieces adopt bolts;
or,
in the assembled steel waist beam, a plurality of arc-shaped sub-beams are four arc-shaped sub-beams which can be assembled into a circular structure; four prestressed circumferential steel waist beam connecting pieces are arranged;
in the assembled corrugated plate, a plurality of arc-shaped sub corrugated plates are four arc-shaped sub corrugated plates which can be assembled into a circular structure by beams; the number of the corrugated plate connecting pieces is four.
5. The fabricated recycling type prestressed supporting assembly for an underground shaft according to any one of claims 1 to 3, wherein the joints of two assembled steel wales adjacent up and down are staggered, and the joints of two assembled corrugated plates adjacent up and down are staggered;
or,
all joints of all assembled steel waist beams and assembled corrugated plates at the joints of the supporting and dismantling sides and the supporting and retaining sides in the shield section of the underground shaft are aligned and arranged together, joints of two vertically adjacent assembled steel waist beams at other positions are staggered, and joints of two vertically adjacent assembled corrugated plates at other positions are staggered.
6. The fabricated retrieve pre-stressed support assembly for an underground shaft of claim 2,
the pin-connected panel steel wale all includes: the prestressed ring-shaped steel waist beam comprises a plurality of arc-shaped sub beams, a plurality of straight plate sub beams and a plurality of prestressed ring-shaped steel waist beam connecting pieces; wherein,
the arc-shaped sub-beams and the straight plate sub-beams are connected into an elliptical annular structure capable of adjusting prestress in an annular mode through the prestress annular steel waist beam connecting pieces;
the pin-connected panel buckled plate all includes: the head end of each sub corrugated plate is a connecting hole end, the tail end is a long strip hole end matched with the long strip hole end, and the plurality of arc sub corrugated plates and the plurality of straight sub corrugated plates are connected into an elliptical ring structure capable of adjusting prestress in the ring direction through the plurality of corrugated plate connecting pieces in a mode that the head end and the tail end are connected.
7. The rigging recovery pre-stressed support assembly for an underground shaft according to claim 6,
in the assembled steel waist beam, each prestress annular steel waist beam connecting piece adopts a sleeve box structure with adjustable length, the sleeve box structure is provided with elongated connecting holes, the end part of each arc-shaped sub-beam and the end part of each straight plate sub-beam are provided with elongated connecting holes, and a plurality of parallel elongated connecting holes of each arc-shaped sub-beam and a plurality of parallel elongated connecting holes of each straight plate sub-beam are matched with a plurality of parallel elongated connecting holes of the prestress annular steel waist beam connecting piece;
in the assembled corrugated plate, a plurality of rows of connecting holes are arranged in parallel from top to bottom at the connecting hole end of the head end of each sub corrugated plate, each row of connecting holes comprises a plurality of connecting holes arranged at intervals, and a plurality of strip-shaped holes are arranged in parallel from top to bottom at the strip hole end of the tail end of each sub corrugated plate; ribbed plates are arranged at the head end and the tail end of each sub-corrugated plate, and jack clamping grooves are respectively arranged at the two ends of each ribbed plate.
8. The fabricated retractable prestressed supporting assembly for an underground shaft according to claim 6 or 7, wherein in the assembled steel wale, the plurality of arc-shaped sub-beams are six arc-shaped sub-beams which can be assembled into two semicircular structures; the plurality of straight plate sub-beams are two straight plate sub-beams which are connected between the two semicircular ring structures in parallel; two prestressed circumferential steel waist beam connecting pieces are provided;
in the assembled corrugated plate, a plurality of arc-shaped sub corrugated plates are six arc-shaped sub corrugated plates which can be assembled into two semicircular structures; the plurality of straight sub corrugated plates are two straight sub corrugated plates which are connected in parallel between the two semicircular ring structures formed by the plurality of arc sub corrugated plates; the corrugated plate connecting pieces are all bolts.
9. The rigging recovery prestressed support assembly for an underground shaft according to claim 8, further comprising: and two ends of the inner supporting piece are respectively connected with the two straight plate sub-beams which are arranged oppositely, and the inner supporting piece is supported between the two opposite straight plate sub-beams.
10. The assembled and recycled prestressed supporting assembly for the underground shaft according to claim 1, 6 or 7, wherein the joints of two vertically adjacent assembled steel wales are arranged in a staggered manner, and the joints of two vertically adjacent assembled corrugated plates are arranged in a staggered manner;
or,
all joints of all assembled steel waist beams and assembled corrugated plates at the joints of the supporting and dismantling sides and the supporting and retaining sides in the shield section of the underground shaft are aligned and arranged together, joints of two vertically adjacent assembled steel waist beams at other positions are staggered, and joints of two vertically adjacent assembled corrugated plates at other positions are staggered.
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