CN211692480U - Tunnel segment based on high-performance cement-based composite material - Google Patents
Tunnel segment based on high-performance cement-based composite material Download PDFInfo
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- CN211692480U CN211692480U CN201921775786.9U CN201921775786U CN211692480U CN 211692480 U CN211692480 U CN 211692480U CN 201921775786 U CN201921775786 U CN 201921775786U CN 211692480 U CN211692480 U CN 211692480U
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Abstract
The utility model discloses a tunnel segment based on high performance cement-based composite, both ends confined recess has been seted up respectively to tunnel segment both sides limit, cloth has set up a set of embedded bar in the recess, embedded bar stretches out outside the recess, when the tunnel is assembled, the corresponding lock of recess of two adjacent tunnel segments, form confined segment spread groove, grout hole and grout outlet have been seted up to the terminal surface of segment spread groove, pour into high performance cement-based composite in to the segment spread groove through grout hole and grout outlet, embedded bar carries out dislocation lap joint in the segment spread groove. The utility model discloses a dislocation overlap joint need not accurate location, and construction convenience, section of jurisdiction reinforcing bar pour the high performance cement-based composite of high strength again through this kind of reliable anchor for the wholeness ability and the anti-seismic performance of section of jurisdiction are showing and are improving.
Description
Technical Field
The utility model relates to a high performance cement base combined material and tunnel section of jurisdiction technical field, a tunnel section of jurisdiction based on high performance cement base combined material specifically says so.
Background
In recent years, due to the rapid development of urban rail transit and the acceleration of urbanization process, the demand of China on underground space resources is increasing, and the shield tunnel segment construction technology is widely adopted in urban subway tunnels and large tunnel projects at present due to the advantages of high mechanization degree, high construction speed, small environmental influence and the like. The tunnel segment is also called as a segment, a shield method tunnel is a structure formed by assembling a plurality of prefabricated segments on site through bolt connection, and due to the bolt connection, the water leakage phenomenon easily occurs at the joint (circular seam and longitudinal seam) and the bolt hole position formed between the segments.
The bolt connection is basically manual operation, so that a large amount of time and labor are consumed, the construction speed is low, and the construction period is long. After the bolt adopts waterproof rubber circle and carries out slip casting and caulking treatment among the actual engineering, the phenomenon that appears the percolating water still ubiquitous, in case the seepage appears in the section of jurisdiction, will seriously threaten safety and operation in the tunnel, will cause immeasurable life and property loss especially to electric power tunnel and subway tunnel.
Application number 201610708866.7 discloses a shield method tunnel segment bolt hole waterproof structure and a construction method, waterproof pressure of bolt holes is improved through two waterproof gaskets, and the structure has better durability, but the construction of the connection form is complex, and the aging problem of the waterproof gaskets cannot be avoided.
At present, most of domestic bolt holes are enabled to enhance the waterproof capacity through additional measures, and the bolt connection cannot be avoided. Therefore, the problem to be solved at present is to find a novel tunnel segment connection mode and a construction method which are not connected through bolts, have convenient construction, good anti-permeability performance and durability, reliable connection and low manufacturing cost and can effectively solve the waterproof problem of the bolt holes.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough among the above-mentioned prior art, provide a tunnel section of jurisdiction based on high performance cement base combined material.
The utility model aims at realizing through the following technical scheme:
the utility model provides a tunnel segment based on high performance cement based composite, it is a plurality of the tunnel segment is assembled and is constituted round tunnel ring, both ends confined recess has been seted up respectively to tunnel segment both sides limit, laid a set of embedded bar in the recess, embedded bar stretch out in outside the recess, when the tunnel is assembled, the corresponding lock of recess of two adjacent tunnel segments forms confined segment spread groove, and grout hole and grout outlet have been seted up to the terminal surface of segment spread groove, through grout outlet and grout outlet to pour high performance cement based composite in the segment spread groove, embedded bar carries out dislocation overlap joint in the segment spread groove.
The utility model discloses in the further design, above-mentioned recess is V type recess or U type recess or arc recess.
The utility model discloses in the further design, above-mentioned embedded bar's diameter is not less than 6mm, and the anchor length that stretches out is not less than 5 times of embedded bar diameter.
The utility model discloses in the further design, above-mentioned grout hole is located section of jurisdiction spread groove minimum, the grout outlet hole is located the peak of section of jurisdiction spread groove.
The utility model discloses in the further design, the recess mouth of two tunnel sections of jurisdiction of buckling the concatenation mutually is pasted all around and is had the one deck stagnant water pad.
The utility model discloses in the further design, above-mentioned high performance cement base combined material's mix proportion is cement: fly ash: silica fume: quartz sand: water: water reducing agent: steel fiber =690:240:172:187.34:991.8:22.04:120, wherein the water reducing agent content is 2.0%, the steel fiber volume content is 1.5%, the sand-cement ratio is 0.9, and the water-cement ratio is 0.17.
The tunnel segment assembling construction method based on the high-performance cement-based composite material comprises the following specific steps:
step one, designing and manufacturing a tunnel duct piece mold, placing a reinforcement cage in the tunnel duct piece mold, reserving reinforcement extending out of a groove, and adhering a thin water stop pad around the opening of the groove.
And step two, sequentially assembling the tunnel pipe pieces from the lower right to the upper right, correspondingly buckling and tightly contacting groove openings of the tunnel pipe pieces to form a closed pipe piece connecting groove, forming a grouting hole and a grout outlet at one end of the pipe piece connecting groove, wherein the grouting hole is arranged at the lowest position, and the grout outlet is arranged at the highest position.
And step three, injecting the high-performance cement-based composite material into the segment connecting groove from the grouting hole by adopting a high-pressure grouting machine, stopping grouting when slurry of the high-performance cement-based composite material flows out from the upper slurry outlet hole, blocking the open hole part in time, and splicing the rest tunnel segments by using the same method.
The utility model discloses in the further design, above-mentioned high performance cement base combined material's mix proportion is cement: fly ash: silica fume: quartz sand: water: water reducing agent: steel fiber =690:240:172:187.34:991.8:22.04:120, wherein the water reducing agent content is 2.0%, the steel fiber volume content is 1.5%, the sand-cement ratio is 0.9, and the water-cement ratio is 0.17.
The utility model discloses following outstanding beneficial effect has:
the utility model discloses a do not need bolted connection, need artifical the screwing up when having overcome bolted connection, consume plenty of time and manpower, construction speed is slow, the period length scheduling problem. The problems that water is easy to leak from a bolt hole, a bolt water-stopping sealing ring is easy to age, the difficulty of later maintenance is high and the like in bolt connection are solved.
The utility model discloses well high performance cement base combined material has the characteristics of high tenacity, high durability and hyposmosis rate, connects through pouring high performance cement base combined material, and the impermeability and the durability of section of jurisdiction node obtain very big improvement, and water-proof effects is good, and the later maintenance is with low costs.
The utility model discloses well reinforcing bar need not accurate location through dislocation overlap joint, and construction convenience, section of jurisdiction reinforcing bar pour the high performance cement-based composite of high strength again through this kind of reliable anchor for the wholeness ability and the anti-seismic performance of section of jurisdiction are showing and are improving.
Drawings
FIG. 1 is a schematic structural diagram of a tunnel segment based on a high-performance cement-based composite material in an embodiment;
FIG. 2 is a bottom sectional view of a tunnel segment in an embodiment;
FIG. 3 is a ring diagram of tunnel segments assembled in the embodiment;
fig. 4 is a schematic view of the opening on the segment connecting groove at different splicing positions in the embodiment
In the figure, 1-embedded steel bar, 4-groove, 5-tunnel segment, 7-grouting hole, 8-grout outlet, 9-steel bar cage, 10-grouting hole, 11-grout outlet, 12-tunnel segment, 13-tunnel segment, 14-tunnel segment, 15-segment connecting groove, 16-segment connecting groove, 17-segment connecting groove, 18-grouting hole, and 19-grout outlet.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
Examples
Referring to the attached figure 1, a tunnel segment based on a high-performance cement-based composite material is formed by splicing a plurality of tunnel segments 5 to form a circle of tunnel ring, two side edges of each tunnel segment are respectively provided with a V-shaped groove 4 with two closed ends, a group of embedded steel bars 1 with the diameter not less than 6mm are distributed in the grooves 4, the embedded steel bars 1 extend out of the grooves 4, and the extending anchoring length is not less than 5 times of the diameter of the embedded steel bars; the extended anchoring length refers to the portion of the precast segment that extends out of the interior of the precast segment and is not encased by concrete. When the tunnel is assembled, the openings of the grooves 4 of the two adjacent tunnel segments 5 are correspondingly buckled to form a closed segment connecting groove, and a water stop pad is adhered around the groove openings of the two tunnel segments which are buckled and spliced. The end face of the segment connecting groove is provided with a grouting hole and a grout outlet, the grouting hole is located at the lowest point of the segment connecting groove, and the grout outlet is located at the highest point of the segment connecting groove. High-performance cement-based composite materials are poured into the segment connecting grooves through the grouting holes and the grout outlet holes, and embedded steel bars in the segment connecting grooves are connected in a staggered lap joint mode. The staggered lap joint connection is the meaning that the reinforcing steel bars are mutually staggered, staggered and not contacted. The purpose of this is to eliminate the need for precise positioning between the bars, which also takes advantage of the confined space. The high-performance cement-based composite material comprises the following components in parts by mass: fly ash: silica fume: quartz sand: water: water reducing agent: steel fiber =690:240:172:187.34:991.8:22.04:120, wherein the water reducing agent content is 2.0%, the steel fiber volume content is 1.5% (volume ratio), the sand-cement ratio is 0.9 (ratio of quartz sand mass to all the gelled materials mass), and the water-cement ratio is 0.17 (ratio of water mass to all the gelled materials mass).
Use the utility model discloses a when the construction is assembled to the tunnel section of jurisdiction, need not pass through bolted connection, the corresponding lock of recess opening of two adjacent tunnel sections of jurisdiction when assembling forms the section of jurisdiction spread groove of confined rhombus, and embedded steel bar can adopt dislocation lap joint in the recess, pours into high performance cement base combined material in the recess and connects. Taking 3 tunnel segments to form a ring of tunnel rings as an example, referring to fig. 2-4, the method specifically comprises the following steps:
step one, designing and manufacturing a tunnel segment mould, placing a reinforcement cage 9 in the tunnel segment mould, reserving a reinforcement 1 extending out of a groove 4, and pasting a thin water stop pad around the opening of the groove 4 to ensure that the contact part of the tunnel segment has a better waterproof effect. Tunnel segment 12, tunnel segment 13 and tunnel segment 14 are obtained.
And step two, sequentially assembling the tunnel pipe pieces from bottom to top, assembling the tunnel pipe piece 12 and the tunnel pipe piece 13 at the bottom, after the tunnel pipe pieces are assembled and tightly connected, forming a rhombic pipe piece connecting groove 15 in the contact part, forming two grouting holes 7 and a grout outlet hole 8 on one side of the pipe piece connecting groove 15, wherein the grouting hole 7 is at the lowest position, and the grout outlet hole 8 is at the highest position. After the tunnel segment 12 and the tunnel segment 13 are assembled, the tunnel segment 14 is assembled by the same method, the tunnel segment 14 is respectively buckled with the tunnel segment 12 and the tunnel segment 13 to form a rhombic segment connecting groove 17 and a rhombic segment connecting groove 16, a grouting hole 10 and a grout outlet hole 11 are formed in one end of the segment connecting groove 16, and a grouting hole 18 and a grout outlet hole 19 are formed in one end of the segment connecting groove 17.
And step three, injecting the high-performance cement-based composite material into the segment connecting grooves 15 from the grouting holes 7 by using a high-pressure grouting machine, stopping grouting when slurry of the high-performance cement-based composite material flows out of the upper slurry outlet 8, blocking the grouting holes 7 and the slurry outlet 8 in time, and sequentially filling the rest segment connecting grooves by using the same method.
The high-performance cement-based composite material comprises the following components in percentage by weight: fly ash: silica fume: quartz sand: water: water reducing agent: steel fiber =690:240:172:187.34:991.8:22.04:120, wherein the water reducing agent content is 2.0%, the steel fiber volume content is 1.5%, the sand-cement ratio is 0.9, and the water-cement ratio is 0.17.
Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.
Claims (5)
1. The utility model provides a tunnel segment based on high performance cement-based composite, it is a plurality of the tunnel segment is assembled and is constituted round tunnel ring, its characterized in that, both ends confined recess has been seted up respectively to tunnel segment both sides limit, lay a set of embedded bar in the recess, embedded bar stretch out in outside the recess, when the tunnel is assembled, the corresponding lock of recess of two adjacent tunnel segments forms confined segment spread groove, and grout hole and grout outlet have been seted up to the terminal surface of segment spread groove, through grout hole and grout outlet to pour high performance cement-based composite in the segment spread groove, embedded bar carries out dislocation overlap joint in the segment spread groove.
2. The high performance cement-based composite based tunnel segment of claim 1, wherein the grooves are V-shaped grooves or U-shaped grooves or arc-shaped grooves.
3. The high-performance cement-based composite material-based tunnel segment as claimed in claim 1, wherein the diameter of the embedded steel bars is not less than 6mm, and the extended anchoring length is not less than 5 times the diameter of the embedded steel bars.
4. The high performance cement-based composite material-based tunnel segment of claim 1, wherein said grouting holes are located at the lowest point of segment connecting grooves, and said grout outlet holes are located at the highest point of segment connecting grooves.
5. The tunnel segment based on the high-performance cement-based composite material as claimed in claim 1, wherein a water stop pad is adhered around the groove openings of the two tunnel segments which are buckled and spliced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921775786.9U CN211692480U (en) | 2019-10-22 | 2019-10-22 | Tunnel segment based on high-performance cement-based composite material |
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| CN201921775786.9U CN211692480U (en) | 2019-10-22 | 2019-10-22 | Tunnel segment based on high-performance cement-based composite material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608052A (en) * | 2019-10-22 | 2019-12-24 | 湘潭大学 | Tunnel segment based on high-performance cement-based composite material and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608052A (en) * | 2019-10-22 | 2019-12-24 | 湘潭大学 | Tunnel segment based on high-performance cement-based composite material and construction method thereof |
| CN110608052B (en) * | 2019-10-22 | 2024-10-11 | 湘潭大学 | Tunnel segment based on high-performance cement-based composite material and construction method thereof |
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Address after: 411105 No.5 Gaoling Road, yanggutang, Xijiao, Xiangtan City, Hunan Province Patentee after: XIANGTAN University Patentee after: Jiangsu menglianqiao Technology Co.,Ltd. Address before: 411105 No.5 Gaoling Road, yanggutang, Xijiao, Xiangtan City, Hunan Province Patentee before: XIANGTAN University Patentee before: NANJING MENGLIANQIAO SENSING TECHNOLOGY Co.,Ltd. |