CN111411979A - Detachable light steel-UHPC combined shield segment and preparation method thereof - Google Patents
Detachable light steel-UHPC combined shield segment and preparation method thereof Download PDFInfo
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- CN111411979A CN111411979A CN202010324591.3A CN202010324591A CN111411979A CN 111411979 A CN111411979 A CN 111411979A CN 202010324591 A CN202010324591 A CN 202010324591A CN 111411979 A CN111411979 A CN 111411979A
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000011372 high-strength concrete Substances 0.000 claims abstract description 7
- 241000357293 Leptobrama muelleri Species 0.000 claims description 42
- 239000004567 concrete Substances 0.000 claims description 24
- 238000013461 design Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 230000008719 thickening Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 5
- 239000011150 reinforced concrete Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 230000035515 penetration Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/086—Methods of making concrete lining segments
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a detachable light steel-UHPC combined shield segment and a preparation method thereof, belonging to the technical field of tunnel shield construction. Including inlayer steel-pipe section and outer super high strength concrete section of jurisdiction, the inlayer section of jurisdiction comprises arc side steel sheet, end steel sheet, stiffening rib, the light-duty steel backplate of arc, is equipped with the connecting bolt hole on arc side steel sheet, the end steel sheet, and the light-duty steel backplate of arc is equipped with radial toggle pin outward, and outer UHPC section of jurisdiction has the super high strength concrete arc of certain thickness for pouring in light-duty steel backplate toggle pin one side of arc. A plurality of shield segments are connected into a ring shape through end steel plate bolts, connected into a shield tunnel through side steel plate bolts, and provided with rubber sheet sealing water stops with triangular heads at seams. The invention has the remarkable characteristics that the inner layer steel pipe piece and the outer layer UHPC pipe piece are connected through the studs to form a combined structure of steel and UHPC, the combined structure can resist external load together, the pipe pieces are connected through the straight bolts and can be disassembled, and the invention has the advantages of high strength, large rigidity, light dead weight, convenient assembly and disassembly and reutilization.
Description
Technical Field
The invention relates to the technical field of subway and highway tunnel construction, in particular to a detachable light steel-UHPC combined shield segment and a preparation method thereof.
Background
The shield method is a construction method for forming a tunnel structure by excavating in a soil layer by using a shield machine, excavating while excavating, and then splicing and supporting prefabricated lining segments in an excavated space.
The existing shield segment is mainly of an arc-shaped plate structure consisting of reinforcing steel bars and common concrete, the thickness of the shield segment reaches 300-350 mm, the weight of a single segment reaches more than 3 tons, the self weight is large, and the common concrete has low tensile strength, so that concrete at hand holes and corners is damaged in the transportation and installation processes; in the operation process, structural cracks are easy to appear under the action of load, water seepage and other diseases are caused, and hidden dangers are caused to the safety and the durability of the tunnel.
On the other hand, traditional prefabricated reinforced concrete section of jurisdiction is generally through dismantling the big fixed mode concatenation of the degree of difficulty (if set up the connecting hole of arcuation on prefabricated reinforced concrete section of jurisdiction, adjacent prefabricated reinforced concrete section of jurisdiction passes the connecting hole of adjacent prefabricated reinforced concrete section of jurisdiction through the bending bolt in order to accomplish the concatenation), make when needs are dismantled (if meet the station position in the subway construction, the normal way is that the shield constructs the quick-witted normal tunnelling, install the shield section of jurisdiction earlier in the station scope, let the shield tunnel pass the station in succession, when the construction of station underground building structure, the tunnel lining section of jurisdiction that has installed in this scope need be dismantled, dismantle the abandonment mode after the difficulty or adopt direct damage, cause considerable wasting of resources.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the detachable light steel-UHPC combined shield segment which has light dead weight, high tensile strength and high compressive strength and can overcome the technical problems that the existing shield segment is difficult to detach and cannot be recycled.
In order to achieve the purpose, the invention adopts the following technical scheme:
a detachable light steel-UHPC combined shield segment is characterized by comprising an inner layer steel segment and an outer layer ultra-high strength concrete segment;
the inner steel sub-pipe comprises an arc-shaped steel back plate, side plates arranged on two sides of the steel back plate and end plates arranged at two ends of the light steel back plate;
the convex outer surface of the arc-shaped steel back plate is provided with a connecting piece, and the outer-layer ultrahigh-strength concrete duct piece is tightly attached to the steel back plate through the connecting piece;
connecting holes are respectively formed in the side plates and the end plates, and adjacent detachable light steel-UHPC combined shield segments are connected with the connecting holes in a penetrating mode through fasteners to achieve splicing connection.
Preferably, a plurality of stiffening ribs are arranged between the two side plates at intervals.
Preferably, the stiffening ribs are square steel pipes.
Preferably, the side plates and the end plates are steel plates.
Preferably, a water stop sheet is arranged between the adjacent detachable light steel-UHPC combined shield segments.
Preferably, one end of the water stop sheet is thickened, and the thickened end of the water stop sheet is flush with the upper surface of the outer-layer ultrahigh-strength concrete segment.
Preferably, the connecting member is a stud which is arranged on the steel back plate and points outwards.
Preferably, the fastener is a bolt.
The invention also discloses a preparation method of the shield segment, which comprises the following steps:
the steel back plate, the side plates, the end plates, the stiffening ribs and the connecting pieces are respectively subjected to blanking processing according to design drawings, the connecting holes are formed in the side plates and the end plates at certain intervals, and the steel back plate, the side plates, the end plates and the stiffening ribs are spliced;
welding the connecting piece on the steel back plate to form the inner-layer steel segment;
and (3) taking the steel back plate as a bottom template, installing a side template, and pouring the ultra-high performance concrete layer on the steel back plate.
Compared with the prior art, the invention has the beneficial effects that:
the invention combines steel and UHPC (ultra high performance concrete) by utilizing the mechanical property advantages of high strength and high toughness of the steel and the ultra high performance concrete (the tensile strength and the compressive strength of the steel can reach more than 280MPa, the tensile strength of the UHPC material is 5-10 MPa, and the compressive strength can reach 150MPa), and the steel and the UHPC are connected by the studs to achieve integral stress, thereby forming the novel shield segment with the steel-UHPC combined structure. Compared with the shield segment of the existing reinforced concrete plate type structure, the novel steel-UHPC combined structure segment can fully exert the advantages of two materials, and the strength and the rigidity of the segment can be greatly improved; under the same stress condition, the ultra-high performance concrete segment is thinner, so that the dead weight of the segment is reduced, and the high strength and light weight of the segment are realized; the technical problems that the tensile strength of a UHPC material is higher than that of common concrete (about 4 times or more) and the common concrete is not easy to crack are solved, and the defects of water seepage and the like are caused due to the fact that the common concrete pipe piece is low in tensile strength.
Furthermore, the connecting holes are formed in the end plates and the side plates of the inner steel pipe sheet layer, so that when the shield segments are spliced, the end plates or the side plates of the adjacent light steel-UHPC combined shield segments are abutted against each other, and then the shield segments can be spliced by the fasteners penetrating through the corresponding connecting holes; the fastener can select to dismantle convenient connecting piece such as straight bolt, and then makes the concatenation convenient with the dismantlement section of jurisdiction, and when needs are dismantled, need not damaged shield and constructs the section of jurisdiction, only needs to loosen the fastener, can dismantle fast, and then guarantees that the shield of dismantling constructs the section of jurisdiction and keeps integrality to recycle, resources are saved.
Drawings
The invention will now be further described with reference to the accompanying drawings and specific embodiments thereof:
FIG. 1 is a schematic structural view of a duct piece of the present invention;
fig. 2 is a schematic view of segment assembly joints of the present invention.
In the figure:
1. the concrete sealing plate comprises side plates, 2, end plates, 3, stiffening ribs, 4, a back plate, 5, studs, 6, connecting holes, 7, outer-layer ultrahigh-strength concrete segment, 8, bolts, 9 and water stop sheets.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example one
As shown in fig. 1-2, the present embodiment discloses a detachable light steel-UHPC (Ultra-high performance Concrete, UHPC for short) combined shield segment, which is characterized by comprising an inner steel sub-segment and an outer Ultra-high strength Concrete sub-segment 7, wherein the inner steel sub-segment comprises an arc-shaped steel back plate 4, a connecting member is arranged on a convex outer surface of the steel back plate 4, and the outer Ultra-high strength Concrete sub-segment 7 is tightly attached to the steel back plate 4 through the connecting member.
In this embodiment, the outer layer ultrahigh-strength concrete segment 7 is an outer layer ultrahigh-strength concrete segment layer.
The existing shield segment is a curved plate-shaped structure composed of steel bars and common concrete, a steel bar framework is generally bound, then concrete (commonly C50 concrete) is poured, and the shield segment is cured and formed under standard conditions. According to the existing design Specification of concrete structures (GB50010-2010), the designed value of the compressive strength of C50 concrete is 23.1MPa, and the value of the tensile strength is 1.89 MPa; the compression strength design value of the commonly used HRB335 grade steel bar is 280MPa, and the tensile strength design value is 280 MPa; the shield segment is easy to crack and damage in the transportation and installation process due to the lower strength of the common concrete of the shield segment; in the operation process, micro cracks are easy to generate to cause water seepage and water leakage of the segments under the action of load, and the existing design specification takes the width of the cracks as a control target, and more reinforcing steel bars are configured, so that the traditional reinforced concrete shield segments are thicker and heavier.
The shield segment of this embodiment utilizes the mechanical properties that steel is high-strength (tensile, compressive strength design value of Q345 steel is 295MPa) (GB50017-2017) and the superhigh strength of ultra high performance concrete (tensile strength is 5 ~ 10MPa, compressive strength can reach 150MPa), combines together steel and UHPC, reaches whole atress through the stud connection, forms the novel shield segment of steel-UHPC integrated configuration. Compared with the shield segment with the existing reinforced concrete plate type structure, the novel steel-UHPC combined structure segment can fully exert the mechanical property advantages of high strength and high toughness of two materials, so that the integral bearing capacity is greatly improved, and the integral rigidity of the segment is large and the deformation is small. Under the same load bearing condition, the ultra-high performance concrete segment (namely the ultra-high performance concrete layer) of this embodiment is thinner, and then lightens the dead weight of segment for the segment of this embodiment realizes excelling in, the lightweight. The weight of the segment of this embodiment is about 2/3 for a conventional segment, i.e., the weight of the segment of this embodiment is reduced by about 30% as compared to a ring of conventional shield tunnel segments of the same diameter and length. The light segment has low requirement on the lifting capacity of construction machinery, and further reduces the construction cost. The tensile strength of the UHPC material in the embodiment is more than 4 times that of the existing common concrete material of the duct piece, and the compressive strength is 2-3 times that of the common concrete, so that the duct piece is not easy to damage and crack in the transportation, installation and operation processes, and is more favorable for the safety and durability of the shield tunnel.
In this embodiment, the inner steel sub-pipe sheet further includes side plates 1 disposed at both sides of the steel back plate 4 and end plates 2 disposed at both ends of the steel back plate 4; connecting holes 6 are respectively arranged on the side plates 1 and the end plates 2, and adjacent steel-UHPC combined shield segments are connected with each other in a penetrating manner through the connecting holes 6 through fasteners to realize assembly connection.
In the embodiment, a plurality of stiffening ribs 3 are arranged between the two side plates 1 at intervals, and the stiffening ribs 3 are square steel pipes; the light steel back plate 4, the side plates 1 and the end plates 2 are steel plates.
Traditional prefabricated reinforced concrete section of jurisdiction is generally through demolising the big fixed mode concatenation of the degree of difficulty (if set up the connecting hole of arcuation on prefabricated reinforced concrete section of jurisdiction, adjacent prefabricated reinforced concrete section of jurisdiction passes the connecting hole of adjacent prefabricated reinforced concrete section of jurisdiction through bending bolt in order to accomplish the concatenation), when making need demolish (if meet the station position in the subway construction, the normal way is that the shield constructs the quick-witted normal tunnelling, install the shield section of jurisdiction earlier in the station within range, let the shield tunnel pass the station in succession, when the construction of station underground building structure, need demolish the tunnel lining section of jurisdiction that has installed in this scope, demolish the abandonment mode after the difficulty or adopt direct damage, cause considerable wasting of resources.
In the embodiment, the end plates 2 pointing to the axis of the light steel back plate 4 are arranged at the two ends of the steel back plate 4, the side plates 1 are arranged on the two sides of the steel back plate 4, and the connecting holes 6 are formed in the end plates 2 and the side plates 1, so that when the shield segments are spliced, the end plates 2 or the side plates 1 of adjacent steel-UHPC combined shield segments abut against each other, and then the shield segments can be spliced through the penetration of the fasteners on the opposite connecting holes 6. Because end plate 2 and curb plate 1 have enough spaces in the section of jurisdiction inboard for the fastener can select to dismantle convenient connecting piece such as straight bolt 8, and then makes the concatenation with dismantle the section of jurisdiction convenient, and when dismantling, need not damaged shield and construct the section of jurisdiction and can dismantle fast, and then guarantee that the shield of dismantling constructs the section of jurisdiction and keep integrality, with cyclic utilization, resources are saved. Be straight bolt 8 if the fastener, be about to bolt 8 pass behind the relative connecting hole 6 with nut fastening connection, can accomplish the concatenation of section of jurisdiction, unscrew the nut and take out bolt 8 during the dismantlement, can accomplish the separation of section of jurisdiction, can not cause the damage.
A plurality of detachable light steel-UHPC combined shield segments of the embodiment are connected through bolts 8 between end plates 2 at two ends to form a ring of shield segments; a plurality of ring shield constructs the section of jurisdiction, along the line axis direction, through 8 hole stagger joints concatenations of the bolt on the side steel sheet, forms the shield tunnel.
In the embodiment, a water stop sheet 9 is arranged between adjacent steel-UHPC combined shield segments; the one end thickening setting of stagnant water piece 9, the one end of the stagnant water piece 9 of thickening flushes with the upper surface of outer ultrahigh strength concrete section of jurisdiction 7. Namely, a water stop sheet 9 is clamped at the joint of adjacent combined shield segments, one end of the water stop sheet 9 is thickened, and one end of the thickened water stop sheet 9 is flush with the outer side surface of the ultra-high strength concrete layer; further, the water stop sheet 9 is a tapered rubber water stop sheet 9.
In the embodiment, when the shield segments are connected by the bolts 8 between the end steel plates at the two ends to form a ring of shield segments, water stop strips with thickened ends are arranged between the segments to seal and stop water (namely, a ring water stop design); adjacent ring shield segments along the length direction of the tunnel are connected through bolts 8 between the steel side plates 1, and a water-swelling rubber water sheet with triangular heads (namely the water stop design in the axial direction and the length direction of the tunnel) is arranged between the two ring side plates 1.
In this embodiment, the connecting member is a stud 5 which is arranged on the steel back plate 4 and points outwards; the fastening piece is a bolt 8, preferably a straight bolt 8, and the straight bolt 8 penetrates through the water stop sheet 9.
In this embodiment, the studs 5 (or rivets) are vertically connected to the steel back plate 4; the studs 5 are welded on the outer surface of the steel back plate 4 at certain intervals to enhance the bonding strength of the ultra-high performance concrete layer and the steel back plate 4, so that the force is transmitted, and the purpose of integral stress is achieved.
In the embodiment, the studs 5 are embedded in the outer layer of the ultra-high performance concrete, the length of the studs is 10-15 mm shorter than that of the UHPC layer, and the distance between every two adjacent studs 5 is 100-200 mm.
When the bolt 8 penetrates through the opposite connecting holes 6 to tightly connect the adjacent bulges, the bolt also penetrates through the water stop sheet 9, so that water stop has downward tensile force, the effect of sealing gaps among the pipe pieces at one end of the thickened water stop sheet 9 is better, and the water stop is more effective; due to the ultrahigh strength of the ultrahigh-performance concrete layer, the ultrahigh-performance concrete layer has the characteristic of being not easy to crack, and further the ultrahigh-performance concrete layer is also a water stop barrier.
In the embodiment, the straight bolts 8 are loosened, namely adjacent segments are loosened, and in the segment removing process, the light steel back plate 4 and the ultra-high performance concrete layer are high in strength and rigidity, and are not easy to break and deform, so that the segments can be further recycled after being removed; the high strength and light weight of the duct piece also make the duct piece more convenient to install or remove; in other words, utilize straight bolt 8 to connect between the combination section of jurisdiction, the concatenation is convenient with the dismantlement, and when dismantling the section of jurisdiction, need not damaged section of jurisdiction and can dismantle fast, and then guarantees the integrality of section of jurisdiction to recycle, resources are saved. The combined structure of the ultra-high performance concrete layer, the light steel back plate 4, the end plate 2 and the side plate 1 resists external load together, and has the characteristics of high strength, high rigidity, light dead weight, convenience in loading and unloading, replaceability and reutilization.
In the embodiment, the bolt 8 is perpendicular to the end plate 2 when passing through the connecting hole 6 on the end plate 2; the bolt 8 is vertical to the side plate 1 when passing through the connecting hole 6 on the side plate 1; the side plates 1 are sequentially abutted with the end portions of the end plates 2.
In this embodiment, not less than 6 connecting holes 6 are arranged on the side plate 11 and the end plate 22 at intervals.
Example two
The embodiment discloses a preparation method of a shield segment, which comprises the following steps:
s1: the steel back plate 4, the side plate 1, the end plate 2, the stiffening ribs 3 and the connecting pieces are respectively subjected to blanking processing according to design drawings, connecting holes 6 are formed in the side plate 1 and the end plate 2 at certain intervals, and the steel back plate 4, the side plate 1, the end plate 2, the stiffening ribs 3 and the connecting pieces are spliced into inner-layer steel sub-segments;
s2: and the outer side of the steel back plate is welded with a stud.
S3: manufacturing a side template by taking the steel back plate 4 as a bottom template, and pouring an ultrahigh-performance concrete layer on the steel back plate 4;
s4: and maintaining the combined shield segment by high-temperature steam to form the combined shield segment.
In other words, the method for preparing the detachable light steel-UHPC combined shield segment disclosed in the first embodiment of the present invention includes the following steps:
step 1: firstly, preparing an inner layer steel pipe sheet. Arc side steel plate, end steel sheet, the square steel pipe of putting more energy into, arc steel backplate and 5 subassemblies of stud are based on the design drawing blanking processing respectively in the prefabricated field, weld each subassembly into inlayer steel-pipe piece.
Step 2: outer UHPC pipe pieces were prepared. And (3) taking the arc-shaped steel back plate as a bottom die, manufacturing a corresponding template of the outer UHPC arc-shaped plate, and pouring UHPC without arranging a steel bar structure in the template.
And step 3: and (5) curing and forming. And (3) after the UHPC is hardened to reach the specified strength, removing the template, and carrying out high-temperature (more than or equal to 90 ℃) steam curing for not less than 48 hours for forming.
After the UHPC is steamed and cured at high temperature for 2-3 days, the duct piece can be transported to the site for installation, and the maintenance of conventional concrete for 28 days is not needed, so that the construction period is greatly saved.
When the shield tunnel is constructed:
step 1: and transversely splicing to form a ring. A plurality of combined shield segment are connected by using bolts 8 on two adjacent segment end steel plates and adopting straight bolts 8, and the joint is embedded with a rubber sheet with a triangular head for sealing and water stopping and is transversely spliced into a ring.
Step 2: and longitudinally splicing to form the shield tunnel. Two adjacent ring shield segments are connected by using respective bolt 8 holes on the parallel side steel plates and adopting a straight bolt 8, the joint is embedded with a rubber sheet with a triangular head for sealing and stopping water, and the longitudinal staggered joints are spliced into a ring shield tunnel.
And step 3: and (6) disassembling. As a temporary structure, the shield tunnel needs to be dismantled, and can be dismantled sequentially through the straight bolts 8 on the loose end steel plate and the arc-shaped side steel plate.
This embodiment combines together steel section of jurisdiction and UHPC (being ultra high performance concrete) section of jurisdiction, has improved the intensity and the rigidity of shield structure section of jurisdiction, has alleviateed the dead weight of section of jurisdiction, makes the bolt 8 between the combination section of jurisdiction connect very conveniently, has improved the efficiency of construction for tunnel lining construction installation, dismantlement are all comparatively convenient, and water stopping performance is good. Especially, when the shield segment is used in a station range, the shield segment can be quickly detached and repeatedly used for the construction of the next subway station section, and the special advantage of reducing the construction cost and the construction efficiency of the tunnel is displayed.
The present invention is not limited to the above-described embodiments, and various changes and modifications of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.
Claims (9)
1. A detachable light steel-UHPC combined shield segment is characterized by comprising an inner layer steel segment and an outer layer ultra-high strength concrete segment;
the inner steel sub-pipe comprises an arc-shaped steel back plate, side plates arranged on two sides of the steel back plate and end plates arranged at two ends of the steel back plate;
the convex outer surface of the arc-shaped steel back plate is provided with a connecting piece, and the outer-layer ultrahigh-strength concrete duct piece is tightly attached to the steel back plate through the connecting piece;
connecting holes are respectively formed in the side plates and the end plates, and adjacent detachable light steel-UHPC combined shield segments are connected with the connecting holes in a penetrating mode through fasteners to achieve splicing connection.
2. The detachable light steel-UHPC combined shield segment as claimed in claim 1, wherein a plurality of stiffening ribs are arranged between two side plates at intervals.
3. The detachable light steel-UHPC combined shield segment of claim 2, wherein the stiffening ribs are square steel tubes.
4. The detachable light steel-UHPC combined shield segment as claimed in any one of claims 2-3, wherein the side plates and the end plates are steel plates.
5. The detachable light steel-UHPC combined shield segment as claimed in claim 4, wherein a water stop sheet is arranged between adjacent detachable light steel-UHPC combined shield segments.
6. The detachable light steel-UHPC combined shield segment as recited in claim 5, wherein one end of the water stop sheet is arranged in a thickening manner, and one end of the thickened water stop sheet is flush with the upper surface of the outer layer ultrahigh-strength concrete segment.
7. The removable light gauge steel-UHPC combined shield segment of claim 5, wherein the connectors are outwardly directed studs disposed on the steel backing plate.
8. The removable light gauge steel-UHPC composite shield segment of claim 7, wherein the fasteners are bolts.
9. The method for preparing the detachable light steel-UHPC combined shield segment as claimed in claim 8, characterized by comprising the following steps:
the steel back plate, the side plates, the end plates, the stiffening ribs and the connecting pieces are respectively subjected to blanking processing according to design drawings, the connecting holes are formed in the side plates and the end plates at certain intervals, and the steel back plate, the side plates, the end plates and the stiffening ribs are spliced;
welding the connecting piece on the steel back plate to form the inner-layer steel segment;
setting a side template by taking the steel back plate as a bottom template, and pouring the ultrahigh-performance concrete layer on the steel back plate;
and maintaining the detachable light steel-UHPC combined shield segment by high-temperature steam to form the shield segment.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112359869A (en) * | 2020-11-05 | 2021-02-12 | 深圳市市政设计研究院有限公司 | Combined structure pipe gallery of UHPC and steel |
| CN112360516A (en) * | 2020-10-23 | 2021-02-12 | 山东建筑大学 | Automatically-retractable steel pipe sheet and assembling method |
| CN112454608A (en) * | 2020-11-12 | 2021-03-09 | 上海隧道工程有限公司 | Shallow-earthing large-diameter shield negative ring pipe piece structure and manufacturing method thereof |
| CN113006818A (en) * | 2021-02-23 | 2021-06-22 | 福州大学 | Novel stainless steel impervious segment and preparation method thereof |
| CN113217018A (en) * | 2021-06-25 | 2021-08-06 | 哈尔滨工业大学（深圳） | Steel-concrete-ultra-high performance concrete combined duct piece and construction method thereof |
| CN114592739A (en) * | 2022-03-22 | 2022-06-07 | 辽宁省城乡市政工程集团有限责任公司 | Semi-assembly type ultra-deep superposed water storage tank and construction process |
| CN114737993A (en) * | 2022-04-21 | 2022-07-12 | 南宁中铁广发轨道装备有限公司 | Recyclable steel concrete combined duct piece for quickly drilling connection channel and assembling method |
| CN115012984A (en) * | 2022-08-05 | 2022-09-06 | 湖南大学 | Phase change thermal insulation layer-UHPC combined shield segment capable of being assembled quickly |
| CN117927270A (en) * | 2024-03-21 | 2024-04-26 | 湖南省交通规划勘察设计院有限公司 | Mountain tunnel pre-assembled lining structure and construction method |
-
2020
- 2020-04-23 CN CN202010324591.3A patent/CN111411979A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360516A (en) * | 2020-10-23 | 2021-02-12 | 山东建筑大学 | Automatically-retractable steel pipe sheet and assembling method |
| CN112360516B (en) * | 2020-10-23 | 2021-07-27 | 山东建筑大学 | Automatically-retractable steel pipe sheet and assembling method |
| CN112359869A (en) * | 2020-11-05 | 2021-02-12 | 深圳市市政设计研究院有限公司 | Combined structure pipe gallery of UHPC and steel |
| CN112454608A (en) * | 2020-11-12 | 2021-03-09 | 上海隧道工程有限公司 | Shallow-earthing large-diameter shield negative ring pipe piece structure and manufacturing method thereof |
| CN113006818A (en) * | 2021-02-23 | 2021-06-22 | 福州大学 | Novel stainless steel impervious segment and preparation method thereof |
| CN113217018B (en) * | 2021-06-25 | 2022-09-06 | 哈尔滨工业大学（深圳） | Steel-concrete-ultra-high performance concrete combined duct piece and construction method thereof |
| CN113217018A (en) * | 2021-06-25 | 2021-08-06 | 哈尔滨工业大学（深圳） | Steel-concrete-ultra-high performance concrete combined duct piece and construction method thereof |
| CN114592739A (en) * | 2022-03-22 | 2022-06-07 | 辽宁省城乡市政工程集团有限责任公司 | Semi-assembly type ultra-deep superposed water storage tank and construction process |
| CN114592739B (en) * | 2022-03-22 | 2024-04-26 | 辽宁省城乡市政工程集团有限责任公司 | Semi-assembled ultra-deep superposed water storage tank and construction process |
| CN114737993A (en) * | 2022-04-21 | 2022-07-12 | 南宁中铁广发轨道装备有限公司 | Recyclable steel concrete combined duct piece for quickly drilling connection channel and assembling method |
| CN115012984A (en) * | 2022-08-05 | 2022-09-06 | 湖南大学 | Phase change thermal insulation layer-UHPC combined shield segment capable of being assembled quickly |
| CN115012984B (en) * | 2022-08-05 | 2022-11-22 | 湖南大学 | Phase change thermal insulation layer-UHPC combined shield segment capable of being assembled quickly |
| CN117927270A (en) * | 2024-03-21 | 2024-04-26 | 湖南省交通规划勘察设计院有限公司 | Mountain tunnel pre-assembled lining structure and construction method |
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