CN111691897B - Inverted arch segment, tunnel inverted arch structure and secondary lining construction method - Google Patents
Inverted arch segment, tunnel inverted arch structure and secondary lining construction method Download PDFInfo
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- CN111691897B CN111691897B CN202010430746.1A CN202010430746A CN111691897B CN 111691897 B CN111691897 B CN 111691897B CN 202010430746 A CN202010430746 A CN 202010430746A CN 111691897 B CN111691897 B CN 111691897B
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- 238000010276 construction Methods 0.000 title abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 230000000712 assembly Effects 0.000 claims description 15
- 238000000429 assembly Methods 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 238000010008 shearing Methods 0.000 description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 12
- 230000002787 reinforcement Effects 0.000 description 7
- 230000001154 acute effect Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000003313 weakening effect Effects 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
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock 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
- E21D11/083—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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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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
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
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- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to an inverted arch duct piece, a tunnel inverted arch structure and a secondary lining construction method, which comprise duct piece bodies, wherein a male joint or a female joint is arranged at the end part of each duct piece body for circumferential splicing, adjacent duct piece bodies can be spliced through the male joint and the female joint, each female joint is provided with a clamping groove, each male joint comprises a base, each base is rotatably connected with a first clamping block and a second clamping block which can be inserted into the clamping grooves, a sliding block is arranged between the first clamping block and the second clamping block, and each sliding block is configured to move between the first clamping block and the second clamping block to drive the first clamping block and the second clamping block to change the included angle.
Description
Technical Field
The invention relates to the technical field of tunnels and underground engineering, in particular to an inverted arch duct piece, an inverted arch structure of a tunnel and a secondary lining construction method.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The inverted arch is constructed by a cast-in-place method in the tunnel construction process at present. The inventor finds that the waterproof layer needs to be laid in advance in the cast-in-place inverted arch construction, reinforcing steel bars are bound on the spot, concrete is poured, then concrete curing is carried out, and the processes are multiple, so that the excavation and supporting deslagging operation and the cast-in-place curing operation need to be carried out in the originally narrow space near the tunnel face, the construction quality of the tunnel inverted arch is difficult to guarantee, and the construction speed cannot be accelerated.
The prefabricated inverted arch can effectively avoid the above problems, but the inventor finds that the connection between every inverted arch basically adopts a bolt member, needs to reserve a hole on an inverted arch pipe piece, weakens the inverted arch pipe piece, and the problem of cracking easily occurs at the position of the reserved hole. Because the prefabricated part of the inverted arch can not be in ideal close contact with the foundation below the prefabricated part of the inverted arch, uneven settlement can be generated between the adjacent inverted arches, cracks are generated on the cast-in-place part at the upper part of the secondary lining of the tunnel, the durability of the tunnel structure is influenced, and the security of the tunnel is threatened.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an inverted arch duct piece which is convenient to construct, high in strength and free of cracking, and a plurality of holes for connection are not required to be formed in the inverted arch duct piece during connection.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the invention provides an inverted arch segment, which includes a segment body, wherein a male joint or a female joint is arranged at an end of the segment body for circumferential splicing, adjacent segment bodies can be spliced through the male joint and the female joint, the female joint is provided with a clamping groove, the male joint includes a base, the base is rotatably connected with a first clamping block and a second clamping block which can be inserted into the clamping groove, a sliding block is arranged between the first clamping block and the second clamping block, and the sliding block is configured to be capable of moving between the first clamping block and the second clamping block to drive an included angle of the first clamping block and the second clamping block to change.
In a second aspect, an embodiment of the present invention provides an inverted arch structure of a tunnel, including a plurality of segment assemblies arranged in a longitudinal direction of the tunnel, the segment assemblies being connected to each other by a connecting member, the segment assembly including a plurality of inverted arch segments, adjacent inverted arch segments being spliced and fixed by a male joint and a female joint.
In a third aspect, the embodiment of the invention provides a construction method of a tunnel secondary lining, which comprises the steps of constructing an inverted arch structure, arranging a shear resistant piece above the end part of the position where the inverted arch structure is connected with a side wall of a tunnel, pouring the secondary lining, and closing the secondary lining into a ring.
The invention has the beneficial effects that:
1. according to the inverted arch duct piece, the male joint and the female joint are arranged on the end faces for circumferential splicing, when the inverted arch duct pieces are spliced and fixed in the circumferential direction, the male joint and the female joint are utilized for adjacent two inverted arch duct pieces, bolt fastening holes do not need to be reserved for the inverted arch duct pieces, the inverted arch duct pieces are more reasonable in stress, and cracks are prevented from occurring due to uneven stress of a tunnel.
2. According to the inverted arch duct piece, the male joint and the female joint are spliced to fix two adjacent inverted arch duct pieces, and compared with the method of fixing two adjacent inverted arch duct pieces by using the fastening bolts, the construction is simpler, and the rapid construction is facilitated.
3. The inverted arch structure is formed by connecting a plurality of pipe sheet rings through connecting pieces, the pipe sheet rings are formed by splicing a plurality of inverted arch pipe sheets, the inverted arch pipe sheets can be prefabricated and processed in batches, the installation is rapid, and compared with the existing construction mode of binding reinforcing steel bars and pouring concrete on the site of the inverted arch structure, the construction method can realize rapid construction of the inverted arch structure, effectively improves the construction efficiency of a tunnel, and ensures the construction quality.
4. According to the construction method of the secondary lining, before the secondary lining is poured, the anti-shearing pieces are arranged above the end parts of the connecting positions of the inverted arch structure and the side walls, then concrete is poured, and when the inverted arch structure is unevenly settled, the influence on cast-in-place secondary lining can be counteracted through the anti-shearing pieces, so that cracks generated in the secondary lining are avoided, and the durability of the tunnel structure is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view of a first inverted duct piece according to example 1 of the present invention;
FIG. 2 is a schematic view of the invention taken along line A of FIG. 1;
FIG. 3 is a schematic structural view of a second inverted duct piece according to example 1 of the present invention;
FIG. 4 is a schematic front view of a male connector according to embodiment 1 of the present invention;
fig. 5 is a schematic side-view explosion diagram of the base, the limiting rod, the first pin and the second pin in embodiment 1 of the present invention;
fig. 6 is a schematic side-view explosion diagram of the first fixture block and the second fixture block in embodiment 1 of the present invention;
FIG. 7 is a schematic view of a female connector according to example 1 of the present invention;
FIG. 8 is a schematic view showing the assembly of the male connector and the female connector according to embodiment 1 of the present invention;
FIG. 9 is a schematic view of an inverted arch structure according to example 2 of the present invention;
FIG. 10 is a schematic view of secondary lining construction in example 3 of the present invention;
wherein, 1, a first inverted arch pipe piece, 2, a second inverted arch pipe piece, 3, a first fixed steel bar, 4, a male joint, 4-1, a base, 4-2, a first clamping block, 4-2-1, a first plane, 4-2-2, a second plane, 4-3, a second clamping block, 4-4, a first lug plate, 4-5, a second lug plate, 4-6, a third lug plate, 4-7, a first pin shaft, 4-8, a second pin shaft, 4-9, a sliding block, 4-9-1, a third plane, 4-9-2, a fourth plane, 4-10, a limiting rod, 5, a second fixed steel bar, 6, a female joint, 6-1, a clamping groove, 7, a mounting groove, 8, a lifting ring, 9, an anchor rope, 10 anchorage devices, 11, a support initial stage, 12, shear-resistant section steel, 13. shear steel bars, 14 secondary lining, 15 reserved steel bars and 16 grouting holes.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Just as the introduction of background art, hole for the fastening needs to be reserved to present prefabricated inverted arch section of jurisdiction, causes the weakening to inverted arch section of jurisdiction, reserves easy fracture problem that takes place in hole department, to above-mentioned problem, this application has provided an inverted arch section of jurisdiction.
In a typical embodiment example 1 of this application, as shown in fig. 1-8, an inverted arch section of jurisdiction is divided into the first inverted arch section of jurisdiction 1 that sets up in the tunnel intermediate position and the second inverted arch section of jurisdiction 2 that sets up in tunnel lateral part position, the inverted arch section of jurisdiction includes the section of jurisdiction body of arcuation, the section of jurisdiction body includes inboard cambered surface, outside cambered surface and sets up the concatenation terminal surface that is used for along the annular concatenation of tunnel at inboard cambered surface and outside cambered surface both ends.
A concatenation terminal surface setting for setting up in the second inverted arch section of jurisdiction of tunnel lateral part, a fixed reinforcement 3 has been buried underground in the side end portion that is used for the hoop concatenation of section of jurisdiction body, a fixed reinforcement one end stretches out to section of jurisdiction body outside, and a fixed reinforcement perpendicular to section of jurisdiction body, a fixed reinforcement stretches out to section of jurisdiction body outside part and male joint 4 fixed connection.
A concatenation terminal surface setting for setting up in the first inverted arch section of jurisdiction 1 of tunnel intermediate position, the terminal surface that the section of jurisdiction body is used for the hoop concatenation is provided with mounting groove 7, be fixed with female joint 6 through second fixed reinforcement 5 in the mounting groove, second fixed reinforcement one end and female joint fixed connection, the other end stretch into the section of jurisdiction body, and the second fixed reinforcement perpendicular to section of jurisdiction body, the female joint has the draw-in groove.
The two ends of the first inverted arch segment arranged in the middle can be spliced and fixed with the second inverted arch segment arranged on one side through the male joint and the female joint.
The male connector comprises a base 4-1, the base is provided with a threaded hole, the base is fixedly connected with the first fixing reinforcing steel bar through the threaded hole in a threaded mode, and in other embodiments, the base is fixedly welded with the first fixing reinforcing steel bar.
The end face of one end of the base is in close contact with the splicing end face of the duct piece body, the end face of the other end of the base is rotatably connected with a first clamping block 4-2 and a second clamping block 4-3 through a pin shaft, and the first clamping block and the second clamping block can rotate around the pin shaft, so that the included angle of the first clamping block and the second clamping block is increased or reduced.
The clamping fixture comprises a base, wherein two first ear plates 4-4 are arranged on the base, two second ear plates 4-5 are arranged at the end part of a first clamping block, two third ear plates 4-6 are arranged at the end part of a second clamping block, the two second ear plates are inserted into the space between the two first ear plates, the two third ear plates are inserted into the space between the two second ear plates, first pin shafts 4-7 are inserted into the first ear plates, the second ear plates and the third ear plates which are positioned on the same side, second pin shafts 4-8 are inserted into the first ear plates, the second ear plates and the third ear plates which are positioned on the other side, the first pin shafts and the second pin shafts are coaxially arranged, the first clamping block and the second clamping block can rotate around the first pin shafts and the second pin shafts, and the included angle between the first clamping block and the second clamping block is increased or reduced.
And 4-9 sliding blocks can be arranged between the first clamping block and the second clamping block, the sliding blocks can be in contact with the opposite end faces of the first clamping block and the second clamping block, and the sliding blocks can move between the first clamping block and the second clamping block so as to drive the included angle between the first clamping block and the second clamping block to be increased or reduced.
In this embodiment, the opposite end surfaces of the first fixture block and the second fixture block have a first plane 4-2-1 and a second plane 4-2-2 arranged at a set obtuse angle, the first plane is arranged close to the base, and the first plane and the second plane are configured to: when the first planes of the first clamping block and the second clamping block are completely jointed, the second planes of the first clamping block and the second clamping block are arranged in a set first acute angle.
The slider end has a third plane 4-9-1 and a fourth plane 4-9-2 disposed at a set second acute angle, the third and fourth planes configured to: when the first planes of the first clamping block and the second clamping block are jointed, the third plane and the fourth plane of the sliding block can be jointed with the second planes of the first clamping block and the second clamping block respectively, namely, the second acute angle is the same as the first acute angle.
When the first planes of the first clamping block and the second clamping block are completely attached, the end part of the sliding block can be plugged into a space formed by the two second planes, the third plane and the fourth plane are respectively completely attached to the two second planes, the sliding block moves towards the direction of the base and is in contact with the end faces, opposite to the first clamping block and the second clamping block, the first clamping block and the second clamping block can be driven to rotate around the axis of the first pin shaft and the axis of the second pin shaft, and the included angle between the first clamping block and the second clamping block is increased.
The female joint 6 is fixedly connected with the second fixed reinforcing steel bar 5 in a threaded mode or welded mode, the female joint is provided with a clamping groove 6-1, the cross section of the clamping groove is of a trapezoidal structure, and the area of one end, close to the segment body, of the clamping groove is larger than that of the other end of the segment body.
In this embodiment, when the section of jurisdiction body of the inverted arch section of jurisdiction in the middle of being located and being located one side carries out the hoop concatenation, the male joint and the female joint of two adjacent section of jurisdiction bodies are close to, and the first fixture block, second fixture block and the slider of male joint insert in the draw-in groove, the terminal surface of slider and the bottom groove face contact of draw-in groove, two adjacent section of jurisdiction bodies continue the relative motion, and the slider moves towards the base direction between first fixture block and second fixture block, drives first fixture block and the increase of second fixture block contained angle for the lateral part groove face contact of first fixture block and second fixture block and draw-in groove, the joint of accomplishing male joint and female joint is fixed.
In this embodiment, be provided with the locating part on the base, the locating part adopts gag lever post 4-10, the gag lever post sets up between two first otic placodes, and the gag lever post passes the space between two third otic placodes to in stretching into the through-hole that the slider set up, when two adjacent section of jurisdiction bodies move in opposite directions, the slider can move along the gag lever post through the through-hole under the effect of draw-in groove bottom groove face, until the gag lever post stretches out the bottom groove face contact of slider with the draw-in groove, at this moment, the gag lever post has restricted the continuation motion of slider, has avoided two section of jurisdiction bodies to force the damage that moves in opposite directions and cause elements such as first fixture block, second fixture block, round pin axle.
In this embodiment, the degree of depth of mounting groove makes two adjacent section of jurisdiction bodies splice the back, and the concatenation terminal surface of two section of jurisdiction bodies can the laminating contact.
The inboard cambered surface of section of jurisdiction body still is provided with a plurality of rings 8, conveniently hoists the inverted arch section of jurisdiction, the section of jurisdiction body still reserves the through-hole of vertically setting up along the tunnel for set up the connecting piece, will be along two adjacent inverted arch sections of jurisdiction of vertically setting up in the tunnel connect as a whole.
Adopt the inverted arch section of jurisdiction of this embodiment, adopt male joint and female joint concatenation fixed during the concatenation of adjacent inverted arch section of jurisdiction, need not to reserve the hole that is used for passing fastening bolt, can not cause the weakening to the section of jurisdiction body, avoided reserving the problem that hole position department easily ftractures, guaranteed the quality and the life of inverted arch, adjacent inverted arch section of jurisdiction adopts the concatenation simultaneously, need not to carry out manual work to the bolt, construction speed is fast, is favorable to quick construction.
Example 2
The embodiment discloses an inverted arch structure of a tunnel, which comprises a plurality of segment assemblies arranged along the longitudinal direction of the tunnel, wherein the segment assemblies are formed by splicing a plurality of inverted arch segments in the embodiment 1, as shown in fig. 9.
The segment assembly comprises a first inverted arch segment arranged in the middle of the tunnel, and two ends of the first inverted arch segment are spliced with a second inverted arch segment arranged on the side of the tunnel. A first inverted segment and two second inverted segments together comprise a segment assembly.
A plurality of section of jurisdiction assemblies pass through the connecting piece and connect as a whole, the connecting piece adopts anchor rope 9, the anchor rope passes a plurality of section of jurisdiction assemblies through the through-hole of the vertical setting in tunnel of edge that the inverted arch section of jurisdiction was reserved, the both ends and the ground tackle 10 fixed connection who sets up at the inverted arch structure both ends of anchor rope connect a plurality of section of jurisdiction assemblies as a whole through anchor rope and ground tackle. The anchor cable and the anchorage device can be the existing elements, and the specific structure of the anchor cable and the anchorage device is not described in detail herein.
The both ends of first inverted arch section of jurisdiction are provided with female joint, and the one end of second inverted arch section of jurisdiction is provided with the male joint to with the concatenation of first inverted arch section of jurisdiction, the other end pre-buried reserved reinforcing bar 15 that has of second inverted arch section of jurisdiction, the length that the reserved reinforcing bar stretches out to section of jurisdiction body outside is not less than 50cm, the reserved reinforcing bar is arranged in stretching into secondary lining, reinforcing inverted arch structure and secondary lining's joint strength.
The section of jurisdiction body middle part position of first inverted arch section of jurisdiction is provided with slip casting hole 16, can carry out the slip casting through the slip casting hole to the space between section of jurisdiction assembly back and the basis, guarantees the in close contact with on inverted arch structure and the lower part basis.
In this embodiment, in two adjacent section of jurisdiction assemblies, the concatenation seam setting of staggering of two adjacent section of jurisdiction bodies, in two specific adjacent section of jurisdiction assemblies, the hoop length of first inverted arch section of jurisdiction is inequality, and the hoop length of second inverted arch section of jurisdiction is inequality, and in two section of jurisdiction assemblies that the interval set up, the hoop length of first inverted arch section of jurisdiction is the same, and the hoop length of second inverted arch section of jurisdiction is the same.
Example 3
The embodiment discloses a construction method of a tunnel secondary lining, which comprises the following steps:
as shown in fig. 10, surrounding rocks are excavated in advance, and then preliminary bracing 11 is performed, and when the tunnel is fully-enclosed waterproof, the inverted arch structure is provided with a waterproof layer, and when the tunnel is semi-enclosed waterproof, the inverted arch structure is not provided with a waterproof layer.
Utilize rings location hoist first inverted arch section of jurisdiction 1, splice second inverted arch section of jurisdiction 2 in the both ends hoop of first inverted arch section of jurisdiction, form a section of jurisdiction assembly, along a plurality of section of jurisdiction assemblies of tunnel longitudinal positioning hoist and mount, until a plurality of section of jurisdiction assemblies equals the length of a secondary lining cutting platform truck along the longitudinal length in tunnel, utilize anchor rope and ground tackle to connect multirow section of jurisdiction assembly as a whole.
The anti-shearing piece is arranged at the position where the segment assembly is connected with the side wall of the tunnel and above the splicing end face of the second inverted arch segment, the anti-shearing piece adopts anti-shearing section steel 12 and anti-shearing reinforcing steel bars 13, in the embodiment, the anti-shearing section steel adopts I-shaped steel, the anti-shearing section steel and the anti-shearing reinforcing steel bars cannot be directly arranged on the splicing end face of the second inverted arch segment, at least 5cm of concrete protective layer needs to be reserved on the second inverted arch segment, then the anti-shearing section steel and the anti-shearing reinforcing steel bars are arranged on the concrete protective layer, and the length of the anti-shearing section steel and the anti-shearing reinforcing steel bars is determined according to the length of the secondary lining trolley.
After the arrangement of the shear-resistant steel and the shear-resistant reinforcing steel bars is completed, the secondary lining 14 is poured by utilizing concrete, the reserved reinforcing steel bars 15 of the second inverted arch segment stretch into the secondary lining, and after the maintenance of the secondary lining is completed, the secondary lining is closed into a ring.
Grouting the space between the inverted arch structure and the foundation through the grouting holes 16 reserved in the first inverted arch duct piece to enable the inverted arch structure to be in close contact with the lower foundation, and finishing construction.
According to the construction method, by arranging the shear-resistant steel sections and the shear-resistant reinforcing steel bars, when the inverted arch structure has uneven settlement, the influence of the uneven settlement on the cast-in-place secondary lining can be counteracted, cracks are prevented from being generated on the cast-in-place part at the upper part of the secondary lining, and the durability and the safety of the tunnel structure are ensured.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (9)
1. An inverted arch segment comprises a segment body, and is characterized in that a male joint or a female joint is arranged at the end part of the segment body for annular splicing, adjacent segment bodies can be spliced through the male joint and the female joint, the female joint is provided with a clamping groove, the male joint comprises a base, the base is rotatably connected with a first clamping block and a second clamping block which can be inserted into the clamping groove, a sliding block is arranged between the first clamping block and the second clamping block, and the sliding block is configured to move between the first clamping block and the second clamping block to drive the first clamping block and the second clamping block to change the included angle;
the opposite end surfaces of the first fixture block and the second fixture block are provided with a first plane and a second plane which form an included angle, and the first plane and the second plane are configured as follows: when the first planes of the first fixture block and the second fixture block are attached, the second planes of the first fixture block and the second fixture block form an included angle;
the end of the slider has a third plane and a fourth plane disposed at an included angle, the third plane and the fourth plane configured to: when the first planes of the first clamping block and the second clamping block are jointed, the third plane and the fourth plane of the sliding block can be jointed with the second planes of the first clamping block and the second clamping block respectively.
2. The inverted arch segment as set forth in claim 1, wherein the male connector and the female connector are fixedly connected to the segment body by means of fixing bars, the fixing bars are embedded inside the segment body, and one end portion thereof extends to the outside of the segment body.
3. The inverted segment set forth in claim 1, wherein said base is provided with a stopper capable of passing through said slider and contacting with the bottom groove surface of said groove for restricting the movement of said slider between said first and second retainers.
4. An inverted arch structure of a tunnel, comprising a plurality of segment assemblies for being arranged in a longitudinal direction of the tunnel, the plurality of segment assemblies being connected to each other by a connecting member, a segment ring comprising a plurality of inverted arch segments as set forth in any one of claims 1 to 3, adjacent inverted arch segments being fixed by being spliced by a male joint and a female joint.
5. The inverted arch structure of claim 4, wherein the connecting members comprise anchor lines and anchors, the anchor lines are longitudinally extended through the plurality of segment assemblies along the tunnel, and both ends of the anchor lines are fixedly connected to the anchors fixed to both ends of the inverted arch structure.
6. The inverted arch structure of tunnel according to claim 4, wherein in the segment assembly, the inverted arch segments at the end portions are provided with reserved reinforcing bars extending to the outside of the segment body, the reserved reinforcing bars being adapted to extend into the secondary lining.
7. The inverted arch structure of tunnel according to claim 4, wherein the inverted arch tube sheet located at the middle of the tube sheet assembly is provided with a grouting hole for grouting the back of the inverted arch structure.
8. A method of constructing a secondary tunnel lining, comprising constructing an inverted arch structure according to claim 4, arranging a shear member above an end portion of the inverted arch structure at a position where the inverted arch structure meets a side wall of a tunnel, and casting a secondary lining, the secondary lining being closed into a ring.
9. The method of claim 8, wherein the shear members comprise shear-resistant steel bars and shear-resistant reinforcing bars, and a concrete protective layer is provided between the shear-resistant steel bars and the ends of the inverted arch structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010430746.1A CN111691897B (en) | 2020-05-20 | 2020-05-20 | Inverted arch segment, tunnel inverted arch structure and secondary lining construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010430746.1A CN111691897B (en) | 2020-05-20 | 2020-05-20 | Inverted arch segment, tunnel inverted arch structure and secondary lining construction method |
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| CN111691897A CN111691897A (en) | 2020-09-22 |
| CN111691897B true CN111691897B (en) | 2022-02-08 |
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| CN108194099A (en) * | 2018-02-09 | 2018-06-22 | 江苏格睿特管网工程有限公司 | The connection structure of quick-assembling shield duct piece and its assembled engineering method |
| CN109667587A (en) * | 2018-12-28 | 2019-04-23 | 中铁第勘察设计院集团有限公司 | Using the drill+blast tunnel structure of prefabrication and assembly construction inverted arch |
| CN109763838A (en) * | 2019-03-13 | 2019-05-17 | 中铁第一勘察设计院集团有限公司 | Assembled inverted arch structure and its assembling method suitable for drill+blast tunnel |
| CN209369834U (en) * | 2019-01-08 | 2019-09-10 | 四川公路桥梁建设集团有限公司 | A kind of prefabricated assembled secondary liner structure in tunnel |
| CN111022072A (en) * | 2019-12-17 | 2020-04-17 | 云南功东高速公路建设指挥部 | Combined joint for reinforcing secondary lining of tunnel constructed by mining method and mounting method |
| CN111156030A (en) * | 2020-01-03 | 2020-05-15 | 山东大学 | Anti-bottom-bulging prefabricated assembled tunnel inverted arch structure, assembled tunnel and method |
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2020
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| CN108194099A (en) * | 2018-02-09 | 2018-06-22 | 江苏格睿特管网工程有限公司 | The connection structure of quick-assembling shield duct piece and its assembled engineering method |
| CN109667587A (en) * | 2018-12-28 | 2019-04-23 | 中铁第勘察设计院集团有限公司 | Using the drill+blast tunnel structure of prefabrication and assembly construction inverted arch |
| CN209369834U (en) * | 2019-01-08 | 2019-09-10 | 四川公路桥梁建设集团有限公司 | A kind of prefabricated assembled secondary liner structure in tunnel |
| CN109763838A (en) * | 2019-03-13 | 2019-05-17 | 中铁第一勘察设计院集团有限公司 | Assembled inverted arch structure and its assembling method suitable for drill+blast tunnel |
| CN111022072A (en) * | 2019-12-17 | 2020-04-17 | 云南功东高速公路建设指挥部 | Combined joint for reinforcing secondary lining of tunnel constructed by mining method and mounting method |
| CN111156030A (en) * | 2020-01-03 | 2020-05-15 | 山东大学 | Anti-bottom-bulging prefabricated assembled tunnel inverted arch structure, assembled tunnel and method |
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