CN110778330B - Prefabricated reinforced concrete bottom plate for rapid lining of horseshoe tunnel and construction method - Google Patents
Prefabricated reinforced concrete bottom plate for rapid lining of horseshoe tunnel and construction method Download PDFInfo
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- CN110778330B CN110778330B CN201911091158.3A CN201911091158A CN110778330B CN 110778330 B CN110778330 B CN 110778330B CN 201911091158 A CN201911091158 A CN 201911091158A CN 110778330 B CN110778330 B CN 110778330B
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 61
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
- 239000010959 steel Substances 0.000 claims abstract description 45
- 239000004567 concrete Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000003780 insertion Methods 0.000 claims description 15
- 230000037431 insertion Effects 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 238000013016 damping Methods 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 5
- 229910000746 Structural steel Inorganic materials 0.000 claims 1
- 238000003466 welding Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 238000004904 shortening Methods 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
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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
- E21D11/08—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
- E21D11/10—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
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
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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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- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses an assembled prefabricated reinforced concrete bottom plate for rapid lining of a horseshoe tunnel and a construction method, wherein the method comprises the following steps: designing a tunnel lining unit; step two: binding a steel bar net block in a steel bar processing factory; prefabricating bottom blocks and foot blocks in a prefabricated reinforced concrete segment factory, wherein the bottom blocks and the foot blocks are connected by high-strength bolts; step three: transporting the prefabricated reinforced concrete pipe pieces of the bottom plate of each horseshoe-shaped tunnel to the lining position of the horseshoe-shaped tunnel; then passing through assembling equipment; step four, after assembling and fixing the prefabricated reinforced concrete segments of the bottom plate of the horseshoe-shaped tunnel, manufacturing upper reinforcing steel bars, erecting a template, and pouring concrete above the bottom plate; step five: repeating the second step and the fourth step until the whole lining of the whole horseshoe-shaped tunnel is finished; the method can effectively improve the lining construction progress of the horseshoe-shaped tunnel, improve the construction environment of the horseshoe-shaped tunnel, and is suitable for mass popularization.
Description
Technical Field
The invention relates to the technical field of tunnel concrete lining, in particular to an assembled prefabricated reinforced concrete bottom plate for rapid lining of a horseshoe tunnel and a construction method.
Background
The horseshoe tunnel is a common type in a hydraulic tunnel, the construction speed of lining of the tunnel of the urban door tunnel has great influence on the progress and safety of the engineering, and the construction speed of the lining is limited by binding of reinforcing steel bar net blocks in the tunnel. At present, the binding and welding of the reinforcing mesh blocks of the tunnel lining are mostly carried out in the tunnel, and the binding and welding efficiency of the reinforcing mesh blocks is very low under the influence of space and illumination. In addition, dust and smoke generated in the process of binding and welding a large number of steel bars are difficult to dissipate in the holes, and the health of field workers is seriously endangered.
Disclosure of Invention
Aiming at the technical problems, the invention provides the assembling type prefabricated reinforced concrete bottom plate for the rapid lining of the horseshoe tunnel and the construction method, which can effectively improve the construction progress and the construction environment.
The technical scheme of the invention is as follows: the construction method of the assembled prefabricated reinforced concrete bottom plate for the rapid lining of the horseshoe tunnel comprises the following steps:
the method comprises the following steps: designing a horseshoe-shaped tunnel bottom plate into a tunnel lining unit 2-4 meters along the axial direction of the tunnel according to the excavation size of the horseshoe-shaped tunnel, and dividing each tunnel lining unit into a bottom block and a foot block along the circumferential direction when the tunnel lining unit is designed;
step two: binding a steel bar net block according to the divided bottom block and the divided foot block in the steel bar processing factory outside the tunnel; prefabricating bottom blocks and foot blocks in a prefabricated reinforced concrete segment factory, connecting the reserved steel bars of the foot block prefabricated reinforced concrete segment with an upper reinforcing mesh, and connecting the bottom blocks and the foot blocks by high-strength bolts; wherein, the steel bar net blocks are formed by binding annular stressed steel bars and constructional steel bars;
step three: transporting the prefabricated reinforced concrete pipe pieces of the bottom plate of each horseshoe-shaped tunnel to the lining position of the horseshoe-shaped tunnel; then, through the assembling device, the following steps are carried out: the prefabricated reinforced concrete duct pieces of the foot blocks and the prefabricated reinforced concrete duct pieces of the bottom blocks are sequentially spliced and fixed on the rock wall;
step four, after assembling and fixing the prefabricated reinforced concrete segments of the bottom plate of the horseshoe-shaped tunnel, manufacturing upper reinforcing steel bars, erecting a template, and pouring concrete above the bottom plate;
step five: repeating the second step and the fourth step until the whole lining of the whole horseshoe tunnel is completed, wherein the prefabricated reinforced concrete bottom plate for the rapid lining of the horseshoe tunnel comprises a bottom block and a foot block; one end of each bottom block is provided with an inserting hole, the other end of each bottom block is provided with an inserting steel column, and every two adjacent bottom blocks are fixedly inserted into the inserting steel columns through the inserting holes; the two sides of the bottom block are provided with two inserting blocks and two limiting blocks, the limiting blocks are arranged between the two inserting blocks, and the upper edges of the limiting blocks and the lower edges of the inserting blocks are positioned on the same horizontal line; the two insertion blocks form inverted trapezoid structures in the horizontal plane and the vertical plane, bolt holes are formed in the two sides of the bottom block, and locking mechanisms are arranged in the bolt holes; foot piece one end is provided with the spliced eye, the other end is provided with the grafting steel column of pegging graft, it is fixed with the grafting steel column grafting of pegging graft through the spliced eye between two adjacent foot pieces, foot piece one side is provided with fixed block and fixed orifices, the shape of fixed block and the region that forms between two inserts suit, and foot piece and bottom block pass through the fixed block and insert grafting is fixed, the fixed block pegs graft the back completely with the insert, the fixed block contacts with the stopper, be provided with high strength bolt between foot piece and the bottom block, high strength bolt runs through the fixed orifices in proper order, behind the bolt hole, be connected with locking mechanical system, foot piece opposite side is provided with the dowel bar, through upper portion reinforcing bar net welded fastening between the dowel.
Furthermore, when the height of the horseshoe-shaped tunnel is more than or equal to 5m, the bottom block can be disassembled again, and the disassembling position is prevented from being positioned at a position with larger stress when the disassembly is carried out; when the height of the horseshoe-shaped tunnel is less than 5m, the bottom block is not required to be disassembled; when the height of the horseshoe-shaped tunnel is increased continuously, the vertical force borne by the bottom block is increased continuously, the horizontal length of the bottom block is properly reduced, the pressure borne by the bottom block can be effectively reduced,
further, the prefabricated reinforced concrete segment includes: the bottom block is used for prefabricating reinforced concrete pipe pieces and the foot blocks are used for prefabricating reinforced concrete pipe pieces; the length of the prefabricated reinforced concrete segment along the axial direction of the hole is 2-4m in consideration of transportation requirements.
Furthermore, the grouting holes which are communicated with each other are formed between the bottom block and the foot blocks, and the bottom block and the foot blocks are integrally connected after being poured with concrete, so that the connection strength between the bottom block and the foot blocks is improved.
Further, locking mechanical system includes locking block and damping spring, and the locking block is provided with two, and two locking blocks set up in bolt hole bottom both sides, and the damping spring cover is established on the locking block, and with the bottom block butt, two locking blocks are close to each other under damping spring's effect, lock high strength bolt, avoid high strength bolt to drop in the work progress, improve tunnel lining's stability and security.
Further, the high-strength bolt bottom is provided with the fixture block, the fixture block both sides are provided with the otic placode, bolt hole and fixed orifices both sides all are provided with the bar groove, contained angle between bar groove and the locking block is the right angle, during the use, pass fixed orifices and bolt hole with the high-strength bolt in proper order, the otic placode edgewise bar groove of fixture block both sides is put into, when the high-strength bolt reachs the bolt hole bottom, rotatory high-strength bolt makes otic placode and two locking block joints, along with constantly screwing of high-strength bolt, it is inseparabler to be connected between high-strength bolt and two locking blocks.
Compared with the prior art, the invention has the beneficial effects that: the invention effectively improves the working environment for binding the U-shaped tunnel bottom plate steel bar hole, effectively reduces the construction interference and improves the binding and welding efficiency of the U-shaped tunnel bottom plate steel bar net block; the bottom plate is formed by splicing reinforced concrete prefabricated reinforced concrete segments, so that traffic in the tunnel is convenient to arrange; through set up inserted block and fixed block on bottom piece and foot piece respectively, be convenient for dock and install bottom piece and foot piece, very big shortening construction period, improved work efficiency.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the bottom block of the present invention;
FIG. 3 is a distribution diagram of the insert and stop blocks of the present invention on the bottom block;
FIG. 4 is a schematic view of the bolt hole of the present invention;
FIG. 5 is a schematic structural view of a foot block of the present invention;
FIG. 6 is a view of the arrangement of the fixed block of the present invention on the foot block;
FIG. 7 is a schematic view of the connection of the high-strength bolt of the present invention to the locking mechanism
FIG. 8 is a schematic structural view of the high strength bolt of the present invention;
the steel column locking device comprises a bottom block 1, a bottom block 10, an inserting hole 11, an inserting steel column 12, an inserting block 13, a limiting block 14, a bolt hole 140, a strip-shaped groove, a foot block 2, a fixing block 20, a fixing hole 21, an inserting rib 22, a locking mechanism 3, a locking block 30, a damping spring 31, a high-strength bolt 4, a clamping block 40, an ear plate 41 and an upper reinforcing mesh 5.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments.
Example 1:
the height of the horseshoe tunnel in the embodiment is 4.5m, and the construction method of the prefabricated reinforced concrete bottom plate for the rapid lining of the horseshoe tunnel comprises the following steps:
the method comprises the following steps: according to horseshoe tunnel design and excavation size to and calculate the atress condition, confirm the piecemeal position of 1 prefabricated reinforced concrete section of jurisdiction of bottom block, 2 prefabricated reinforced concrete section of jurisdiction of foot piece, design into 3 meters along the tunnel axial with the horseshoe tunnel bottom plate and be a tunnel lining cutting unit, when every tunnel lining cutting unit design, all cut apart into a bottom block 1, a foot piece 2 along the hoop.
Step two: binding a steel bar net block according to the divided bottom block 1 and the divided foot block 2 in the steel bar processing factory outside the tunnel; prefabricating a bottom block 1 and a foot block 2 in a prefabricated reinforced concrete segment factory, connecting a prefabricated reinforced concrete segment reserved inserted bar 22 of the foot block 2 with an upper reinforcing mesh 5, connecting the bottom block 1 and the foot block 2 by using a high-strength bolt 4, and locking the high-strength bolt 4 by using a locking mechanism 3; wherein, the steel bar net blocks are formed by binding annular stressed steel bars and constructional steel bars; the prefabricated reinforced concrete segment includes: the bottom block 1 is used for prefabricating reinforced concrete pipe pieces, and the foot blocks 2 are used for prefabricating reinforced concrete pipe pieces; considering the transportation requirement, the length of the prefabricated reinforced concrete segment along the axial direction of the hole is 3 m;
step three: transporting the prefabricated reinforced concrete pipe pieces of the bottom plate of each horseshoe-shaped tunnel to the lining position of the horseshoe-shaped tunnel; then, through the assembling device, the following steps are carried out: the prefabricated reinforced concrete duct pieces of the foot blocks 2 and the prefabricated reinforced concrete duct pieces of the bottom blocks 1 are sequentially spliced and fixed on the rock wall;
step four, after assembling and fixing the prefabricated reinforced concrete segments of the bottom plate of the horseshoe-shaped tunnel, manufacturing upper reinforcing steel bars, erecting a template, and pouring concrete above the bottom plate;
step five: repeating the second step and the fourth step until the whole lining of the whole horseshoe-shaped tunnel is finished
Example 2:
the height of the horseshoe tunnel in the embodiment is 6m, when the prefabricated reinforced concrete bottom plate for quickly lining the horseshoe tunnel is constructed, the bottom block 1 needs to be disassembled again, the disassembling position is prevented from being positioned at the position with larger stress when the disassembly is carried out, and the concrete method comprises the following steps:
the method comprises the following steps: according to the excavation size of the horseshoe-shaped tunnel, a horseshoe-shaped tunnel bottom plate is designed into a tunnel lining unit 4 meters along the axial direction of the tunnel, and each tunnel lining unit is divided into two bottom blocks 1 and a foot block 2 along the circumferential direction when being designed;
step two: binding a steel bar net block according to the divided bottom block 1 and the divided foot block 2 in the steel bar processing factory outside the tunnel; prefabricating a bottom block 1 and a foot block 2 in a prefabricated reinforced concrete segment factory, connecting a prefabricated reinforced concrete segment preformed inserting bar 22 of the foot block 2 with an upper reinforcing mesh 5, and connecting the bottom block 1 and the foot block 2 by using a high-strength bolt 4; wherein, the steel bar net blocks are formed by binding annular stressed steel bars and constructional steel bars;
step three: transporting the prefabricated reinforced concrete pipe pieces of the bottom plate of each horseshoe-shaped tunnel to the lining position of the horseshoe-shaped tunnel; then, through the assembling device, the following steps are carried out: the prefabricated reinforced concrete duct pieces of the foot blocks 2 and the prefabricated reinforced concrete duct pieces of the bottom blocks 1 are sequentially spliced and fixed on the rock wall;
step four, after assembling and fixing the prefabricated reinforced concrete segments of the bottom plate of the horseshoe-shaped tunnel, manufacturing upper reinforcing steel bars, erecting a template, and pouring concrete above the bottom plate;
step five: and repeating the second step and the fourth step until the whole lining of the whole horseshoe-shaped tunnel is completed.
Example 3:
the prefabricated reinforced concrete bottom plate for the rapid lining of the horseshoe tunnel shown in figures 1, 2, 3 and 4 comprises a bottom block 1 and foot blocks 2; one end of each bottom block 1 is provided with an inserting hole 10, the other end of each bottom block is provided with an inserting steel column 11, and two adjacent bottom blocks 1 are fixedly inserted through the inserting holes 10 and the inserting steel columns 11; the two sides of the bottom block 1 are provided with two insertion blocks 12 and two limiting blocks 13, the limiting blocks 13 are arranged between the two insertion blocks 12, and the upper edges of the limiting blocks 13 and the lower edges of the insertion blocks 12 are positioned on the same horizontal line; the areas formed on the horizontal plane and the vertical plane by the two insertion blocks 12 are both in an inverted trapezoidal structure; bolt holes 14 are formed in the two sides of the bottom block 1, and locking mechanisms 3 are arranged in the bolt holes 14;
as shown in fig. 7, the locking mechanism 3 comprises two locking blocks 30 and two damping springs 31, the two locking blocks 30 are arranged at two sides of the bottom of the bolt hole 14, the damping springs 31 are sleeved on the locking blocks 30 and abut against the bottom block 1, the two locking blocks 30 are close to each other under the action of the damping springs to lock the high-strength bolt 4, the high-strength bolt 4 is prevented from falling off in the construction process, the stability and the safety of the tunnel lining are improved,
as shown in fig. 5 and 6, an insertion hole 10 is formed at one end of each foot block 2, an insertion steel column 11 is formed at the other end of each foot block 2, two adjacent foot blocks 2 are inserted and fixed with the insertion steel columns 11 through the insertion holes 10, a fixing block 20 and a fixing hole 21 are formed at one side of each foot block 2, the shape of each fixing block 20 is matched with an area formed between the two insertion blocks 12, the foot blocks 2 and the bottom block 1 are inserted and fixed with the insertion blocks 12 through the fixing blocks 20, after the fixing blocks 20 are completely inserted with the insertion blocks 12, the fixing blocks 20 are in contact with the limiting blocks 13, high-strength bolts 4 are arranged between the foot blocks 2 and the bottom block 1, the high-strength bolts 4 sequentially penetrate through the fixing holes 21 and the bolt holes 14 and then are connected with the locking mechanisms 3, insertion ribs 22 are formed at the other sides of the foot blocks; the bottom block 1 and the foot block 2 are provided with the grouting holes communicated with each other, and the bottom block 1 and the foot block 2 are tightly connected into a whole body after being poured by concrete, so that the connection strength between the bottom block 1 and the foot block 2 is improved;
as shown in fig. 4 and 8, a fixture block 40 is arranged at the bottom of the high-strength bolt 4, lug plates 41 are arranged on two sides of the fixture block 40, strip-shaped grooves 140 are formed in two sides of the bolt hole 14 and two sides of the fixing hole 21, an included angle between each strip-shaped groove 140 and each locking block 30 is a right angle, when the high-strength bolt is used, the high-strength bolt 4 sequentially penetrates through the fixing hole 21 and the bolt hole 14, the lug plates 41 on the two sides of the fixture block 40 are placed along the strip-shaped grooves 140, when the high-strength bolt 4 reaches the bottom of the bolt hole 14, the high-strength bolt 4 is rotated to enable the lug plates 41 to be clamped with the two locking blocks 30, and the high.
The specific construction method of the embodiment comprises the following steps:
the method comprises the following steps: according to the excavation size of the horseshoe-shaped tunnel, a horseshoe-shaped tunnel bottom plate is designed into a tunnel lining unit 4 meters along the axial direction of the tunnel, and each tunnel lining unit is divided into two bottom blocks 1 and a foot block 2 along the circumferential direction when being designed;
step two: binding a steel bar net block according to the divided bottom block 1 and the divided foot block 2 in the steel bar processing factory outside the tunnel; prefabricating a bottom block 1 and a foot block 2 in a prefabricated reinforced concrete segment factory, reserving an inserting hole 10 and an inserting steel column 11 at two ends of the bottom block 1, and prefabricating an inserting block 12 and a limiting block 13 at two sides of the bottom block 1; the prefabricated reinforced concrete segment reserved joint bars 22 of the foot blocks 2 are connected with the upper reinforcing mesh 5, and the fixed blocks 20 are prefabricated on the foot blocks 2; the bottom block 1 and the foot block 2 are connected by a high-strength bolt 4, and the high-strength bolt 4 is locked by a locking mechanism 3; wherein, the steel bar net blocks are formed by binding annular stressed steel bars and constructional steel bars;
step three: transporting the prefabricated reinforced concrete pipe pieces of the bottom plate of each horseshoe-shaped tunnel to the lining position of the horseshoe-shaped tunnel; then, through the assembling device, the following steps are carried out: the prefabricated reinforced concrete duct pieces of the foot blocks 2 and the prefabricated reinforced concrete duct pieces of the bottom blocks 1 are sequentially spliced and fixed on the rock wall; wherein, the foot block 2 and the bottom block 1 are fixedly inserted with the insertion block 12 through the fixing block 202;
step four, after assembling and fixing the prefabricated reinforced concrete segments of the bottom plate of the horseshoe-shaped tunnel, manufacturing upper reinforcing steel bars, erecting a template, and pouring concrete above the bottom plate;
step five: and repeating the second step and the fourth step until the whole lining of the whole horseshoe-shaped tunnel is completed.
The above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
Claims (5)
1. The construction method of the prefabricated reinforced concrete bottom plate for the rapid lining of the horseshoe tunnel is characterized by comprising the following steps of:
the method comprises the following steps: designing a horseshoe-shaped tunnel bottom plate into a tunnel lining unit 2-4 meters along the axial direction of the tunnel according to the excavation size of the horseshoe-shaped tunnel, and dividing each tunnel lining unit into a bottom block (1) and a foot block (2) along the circumferential direction when the tunnel lining unit is designed;
step two: binding a steel bar net block according to the divided bottom block (1) and the divided foot block (2) in the steel bar processing factory outside the tunnel; prefabricating the bottom blocks (1) and the foot blocks (2) in a prefabricated reinforced concrete segment factory, connecting the prefabricated reinforced concrete segment preformed inserting bars (22) of the foot blocks (2) with the upper reinforcing mesh (5), and connecting the bottom blocks (1) and the foot blocks (2) by high-strength bolts (4); wherein, the steel bar net blocks are bound by annular stress steel bars and structural steel bars;
step three: transporting the prefabricated reinforced concrete pipe pieces of the bottom plate of each horseshoe-shaped tunnel to the lining position of the horseshoe-shaped tunnel; then, through the assembling device, the following steps are carried out: the prefabricated reinforced concrete pipe pieces of the foot blocks (2) and the prefabricated reinforced concrete pipe pieces of the bottom blocks (1) are sequentially spliced and fixed on the rock wall;
step four, after assembling and fixing the prefabricated reinforced concrete segments of the bottom plate of the horseshoe-shaped tunnel, manufacturing upper reinforcing steel bars, erecting a template, and pouring concrete above the bottom plate;
step five: repeating the second step and the fourth step until the whole lining of the whole horseshoe-shaped tunnel is finished; the assembly type prefabricated reinforced concrete bottom plate comprises a bottom block (1) and foot blocks (2); one end of each bottom block (1) is provided with an inserting hole (10), the other end of each bottom block is provided with an inserting steel column (11), and every two adjacent bottom blocks (1) are fixedly inserted through the inserting holes (10) and the inserting steel columns (11); the two sides of the bottom block (1) are respectively provided with an inserting block (12) and a limiting block (13), the number of the inserting blocks (12) is two, the limiting blocks (13) are arranged between the two inserting blocks (12), and the upper edge of each limiting block (13) and the lower edge of each inserting block (12) are positioned on the same horizontal line; the areas formed on the horizontal plane and the vertical plane of the two insertion blocks (12) are both of inverted trapezoidal structures, bolt holes (14) are formed in the two sides of the bottom block (1), and locking mechanisms (3) are arranged in the bolt holes (14); one end of each foot block (2) is provided with an inserting hole (10), the other end of each foot block is provided with an inserting steel column (11), two adjacent foot blocks (2) are fixedly inserted into the inserting steel columns (11) through the inserting holes (10), one side of each foot block (2) is provided with a fixing block (20) and a fixing hole (21), the shape of each fixing block (20) is matched with the area formed between the two inserting blocks (12), the foot blocks (2) and the bottom blocks (1) are fixedly inserted into the inserting blocks (12) through the fixing blocks (20), after the fixing blocks (20) and the inserting blocks (12) are completely inserted into each other, the fixing blocks (20) are contacted with the limiting blocks (13), high-strength bolts (4) are arranged between the foot blocks (2) and the bottom blocks (1), the high-strength bolts (4) sequentially penetrate through the fixing holes (21) and the bolt holes (14) and then are connected with the locking mechanisms (3), and inserting ribs (22) are arranged on the other, the joint bars (22) at the upper parts of the two foot blocks (2) are welded and fixed through the upper reinforcing mesh (5).
2. The construction method of the prefabricated reinforced concrete bottom plate for the rapid lining of the horseshoe tunnel according to claim 1, wherein when the height of the horseshoe tunnel is more than or equal to 5m, the bottom block (1) is disassembled again, and the disassembled position is prevented from being positioned at a position with larger stress when the disassembly is carried out; when the height of the horseshoe tunnel is less than 5m, the bottom block (1) is not detached again.
3. The construction method of the prefabricated reinforced concrete bottom plate for the horseshoe tunnel rapid lining according to claim 1, characterized in that grouting holes which are communicated with each other are arranged between the bottom block (1) and the foot blocks (2).
4. The construction method of the prefabricated reinforced concrete bottom plate for the rapid lining of the horseshoe tunnel according to claim 1, characterized in that the locking mechanism (3) comprises two locking blocks (30) and two damping springs (31), the two locking blocks (30) are arranged on two sides of the bottom of the bolt hole (14), and the damping springs (31) are sleeved on the locking blocks (30) and are abutted to the bottom block (1).
5. The construction method of the prefabricated reinforced concrete bottom plate for the rapid lining of the horseshoe tunnel according to claim 1, characterized in that a clamping block (40) is arranged at the bottom of the high-strength bolt (4), lug plates (41) are arranged on two sides of the clamping block (40), strip-shaped grooves (140) are arranged on two sides of the bolt hole (14) and two sides of the fixing hole (21), and an included angle between each strip-shaped groove (140) and each locking block (30) is a right angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911091158.3A CN110778330B (en) | 2019-11-09 | 2019-11-09 | Prefabricated reinforced concrete bottom plate for rapid lining of horseshoe tunnel and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911091158.3A CN110778330B (en) | 2019-11-09 | 2019-11-09 | Prefabricated reinforced concrete bottom plate for rapid lining of horseshoe tunnel and construction method |
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| CN110778330A CN110778330A (en) | 2020-02-11 |
| CN110778330B true CN110778330B (en) | 2021-07-09 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754593A (en) * | 1993-08-12 | 1995-02-28 | Ishikawajima Constr Materials Co Ltd | Structure of connecting segment and reinforcement in tunnel structure |
| CN205876350U (en) * | 2016-08-24 | 2017-01-11 | 重庆工商职业学院 | Pin -connected panel tunnel invert structure |
| CN208870604U (en) * | 2018-08-08 | 2019-05-17 | 中铁二院工程集团有限责任公司 | A kind of truss-like tunnel inverted arch liner structure |
| CN209040848U (en) * | 2018-08-01 | 2019-06-28 | 中铁第一勘察设计院集团有限公司 | A kind of tunnel prefabrication and assembly construction lining cutting splicing structure |
| CN209083289U (en) * | 2018-11-27 | 2019-07-09 | 孙志超 | A kind of shield tunnel tunnel bottom backfills precast construction |
-
2019
- 2019-11-09 CN CN201911091158.3A patent/CN110778330B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754593A (en) * | 1993-08-12 | 1995-02-28 | Ishikawajima Constr Materials Co Ltd | Structure of connecting segment and reinforcement in tunnel structure |
| CN205876350U (en) * | 2016-08-24 | 2017-01-11 | 重庆工商职业学院 | Pin -connected panel tunnel invert structure |
| CN209040848U (en) * | 2018-08-01 | 2019-06-28 | 中铁第一勘察设计院集团有限公司 | A kind of tunnel prefabrication and assembly construction lining cutting splicing structure |
| CN208870604U (en) * | 2018-08-08 | 2019-05-17 | 中铁二院工程集团有限责任公司 | A kind of truss-like tunnel inverted arch liner structure |
| CN209083289U (en) * | 2018-11-27 | 2019-07-09 | 孙志超 | A kind of shield tunnel tunnel bottom backfills precast construction |
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| CN110778330A (en) | 2020-02-11 |
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