CN113175329A - Tunnel portal construction method for parallel pipe-jacking tunnel - Google Patents
Tunnel portal construction method for parallel pipe-jacking tunnel Download PDFInfo
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- CN113175329A CN113175329A CN202110565247.8A CN202110565247A CN113175329A CN 113175329 A CN113175329 A CN 113175329A CN 202110565247 A CN202110565247 A CN 202110565247A CN 113175329 A CN113175329 A CN 113175329A
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- tunnel
- pipe
- portal
- jacking
- steel
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 95
- 239000010959 steel Substances 0.000 claims abstract description 95
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
Abstract
The invention relates to a tunnel portal construction method of a parallel pipe-jacking tunnel, which comprises the following steps: a. designing and assembling a portal steel ring and a middle upright post of the pipe-jacking tunnel; b. constructing a tunnel door structure when a first top of the pipe-jacking tunnel is jacked; c. completing jacking of the first top of the pipe-jacking tunnel, and then dismantling a tunnel portal structure at the first top of the pipe-jacking tunnel; d. constructing a tunnel door structure when a second top of the pipe-jacking tunnel is constructed; e. and (5) completing jacking of the second top of the pipe-jacking tunnel, and then constructing a tunnel portal concrete structure. The beneficial effects are that: through in the portal steel loop with bolt installation center pillar, utilize the center pillar respectively with the cooperation of portal steel loop both sides to successively form the portal structure that left and right line tunnel push pipe was used, make the top of left and right line tunnel push pipe advance and can both utilize this portal steel loop to construct, guaranteed that the portal structure can both satisfy the headroom requirement of parallel push pipe machine.
Description
Technical Field
The invention relates to the technical field of pipe jacking construction, in particular to a tunnel portal construction method of a parallel pipe jacking tunnel.
Background
In the design work progress in track traffic main line tunnel, can appear because of the unable adjustment of track circuit need with the adjacent condition of design of left and right line tunnel, the design that every tunnel of conventionality all installed an independent portal steel loop can't be suitable for under this kind of condition. Therefore, a special tunnel portal construction method for parallel rectangular jacking pipes with the spacing smaller than 300mm needs to be designed, and the tunnel portal structure between two tunnels is ensured not to influence the starting and receiving of the jacking pipes.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a tunnel portal construction method for a parallel pipe-jacking tunnel.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a tunnel portal construction method of a parallel pipe-jacking tunnel comprises the following steps:
a. designing and assembling a portal steel ring and a middle upright post of the pipe-jacking tunnel;
b. constructing a tunnel door structure when a first top of the pipe-jacking tunnel is jacked;
c. completing jacking of the first top of the pipe-jacking tunnel, and then dismantling a tunnel portal structure at the first top of the pipe-jacking tunnel;
d. constructing a tunnel door structure when a second top of the pipe-jacking tunnel is constructed;
e. and (5) completing jacking of the second top of the pipe-jacking tunnel, and then constructing a tunnel portal concrete structure.
Wherein, the step a specifically comprises the following steps:
a1, designing the size of a tunnel portal steel ring and the size of a middle upright post according to the size of a push bench and the distance between tunnels;
a2, processing the steel plate and the anchor bars into a hole door steel ring according to the size of the designed hole door steel ring, and processing the steel plate into a center pillar according to the size of the designed center pillar.
Wherein, the step b specifically comprises the following steps:
b1, binding wall, column and beam steel bars at the tunnel portal of the jacking pipe;
b2, hoisting the portal steel ring to the portal of the pipe-jacking tunnel, and welding and positioning the anchor bars of the portal steel ring and the reinforcing steel bars at the portal of the pipe-jacking tunnel after adjusting the position;
b3, connecting the upper end and the lower end of the middle upright post with the portal steel ring by bolts respectively, so that a portal structure for constructing the first roof of the pipe-jacking tunnel is formed between the middle upright post and the portal steel ring;
b4, pouring concrete at the position of the steel ring of the tunnel door and at the rear part of the middle upright post;
b5, installing a rubber waterproof curtain and a one-way pressure plate on the tunnel door structure at the first top of the pipe-jacking tunnel.
Wherein, the step c specifically comprises the following steps:
c1, grouting and plugging the hole portal of the pipe joint and the top pipe tunnel after the first top jacking of the top pipe tunnel is finished;
c2, breaking the concrete at the rear part of the middle upright post of the first top-time hole structure of the top pipe tunnel, and finally removing the rubber waterproof curtain, the one-way pressing plate and the middle upright post of the first top-time hole structure of the top pipe tunnel.
Wherein, the step d specifically comprises the following steps:
d1, rotating the middle upright column by 180 degrees in the horizontal direction and positioning, and then respectively connecting the upper end and the lower end of the middle upright column with the portal steel ring by bolts to form a portal structure between the middle upright column and the portal steel ring when constructing the second roof of the pipe-jacking tunnel;
d2, arranging a water stop steel plate at the intersection of the middle upright post of the tunnel door structure at the second top of the pipe-jacking tunnel and the pipe joint at the first top of the pipe-jacking tunnel for water sealing;
d3, installing a rubber waterproof curtain and a one-way pressure plate on the tunnel door structure at the second top of the pipe-jacking tunnel.
And e, when the tunnel portal concrete structure is constructed in the step e, reinforcing the center pillar and pouring the center pillar into the tunnel portal concrete structure.
The steel ring for the tunnel door comprises a rectangular steel outer ring, a rectangular steel outer ring plate and anchor bars, wherein the two ends of the steel outer ring are respectively welded with the steel outer ring plate, the outer side wall of the steel outer ring is welded with the anchor bars perpendicular to the steel outer ring, and the middle of the top end and the middle of the bottom end of the steel outer ring are respectively provided with a plurality of first screw holes. The center pillar comprises a center pillar shell, center pillar rib plates and connecting plates, wherein the center pillar shell is welded with a plurality of center pillar rib plates, the upper end and the lower end of the center pillar shell are respectively welded with one connecting plate, the connecting plates are provided with a plurality of second screw holes, and the center pillar is arranged in the portal steel ring through the second screw holes and the first screw holes in a bolt connection mode. And a plurality of third screw holes are uniformly distributed on the steel outer ring plate, and a plurality of fourth screw holes are respectively formed in the front and back of the middle upright shell.
Furthermore, four corners of the steel outer ring are rounded corners, a groove is formed in one side of the center pillar shell, and two ends of the groove are respectively rounded corners.
The invention has the beneficial effects that: the middle upright columns are installed in the tunnel portal steel ring through bolts and are matched with the two sides of the tunnel portal steel ring respectively, so that tunnel portal structures for the left and right line tunnel top pipes are formed in sequence, the jacking of the left and right line tunnel top pipes can be constructed by using the tunnel portal steel ring, and the tunnel portal structures can meet the clearance requirement of the parallel pipe jacking machine; the center pillar is used as a reinforcement of a permanent concrete tunnel door structure, and the stability of the tunnel door is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a portal structure in step b of the present invention;
FIG. 2 is a schematic structural diagram of the portal structure in step d of the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a steel ring for a hole door according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a flat side of a center pillar in an embodiment of the present invention;
FIG. 5 is a schematic structural view of the front face of the center pillar in an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of the center pillar in the embodiment of the present invention, which is cut along the horizontal direction.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 and 2, a tunnel portal construction method for a parallel pipe-jacking tunnel includes the following steps:
a. designing and assembling a portal steel ring and a middle upright post of the pipe-jacking tunnel:
a1, designing the size of a tunnel portal steel ring and the size of a middle upright post according to the size of a push bench and the distance between tunnels;
a2, processing the steel plate and the anchor bars into a hole door steel ring according to the size of the designed hole door steel ring, and processing the steel plate into a center pillar according to the size of the designed center pillar.
b. The tunnel portal structure when the first top of the construction push pipe tunnel:
b1, binding wall, column and beam steel bars at the tunnel portal of the jacking pipe;
b2, hoisting the portal steel ring to the portal of the pipe-jacking tunnel, and welding and positioning the anchor bars of the portal steel ring and the reinforcing steel bars at the portal of the pipe-jacking tunnel after adjusting the position;
b3, connecting the upper end and the lower end of the middle upright post with the portal steel ring by bolts respectively, so that a portal structure for constructing the first roof of the pipe-jacking tunnel is formed between the middle upright post and the portal steel ring;
b4, pouring concrete at the position of the steel ring of the tunnel door and at the rear part of the middle upright post;
b5, installing a rubber waterproof curtain and a one-way pressure plate on the tunnel door structure at the first top of the pipe-jacking tunnel.
c. And (3) completing jacking of the first top of the pipe-jacking tunnel, and then dismantling the portal structure when the first top of the pipe-jacking tunnel is jacked:
c1, grouting and plugging the hole portal of the pipe joint and the top pipe tunnel after the first top jacking of the top pipe tunnel is finished;
c2, breaking the concrete at the rear part of the middle upright post of the first top-time hole structure of the top pipe tunnel, and finally removing the rubber waterproof curtain, the one-way pressing plate and the middle upright post of the first top-time hole structure of the top pipe tunnel.
d. The tunnel portal structure during construction of the second top of the pipe jacking tunnel:
d1, rotating the middle upright column by 180 degrees in the horizontal direction and positioning, and then respectively connecting the upper end and the lower end of the middle upright column with the portal steel ring by bolts to form a portal structure between the middle upright column and the portal steel ring when constructing the second roof of the pipe-jacking tunnel;
d2, arranging a water stop steel plate at the intersection of the middle upright post of the tunnel door structure at the second top of the pipe-jacking tunnel and the pipe joint at the first top of the pipe-jacking tunnel for water sealing;
d3, installing a rubber waterproof curtain and a one-way pressure plate on the tunnel door structure at the second top of the pipe-jacking tunnel.
e. And (5) completing jacking of the second top of the pipe-jacking tunnel, and then constructing a tunnel portal concrete structure.
In the technical scheme, the middle upright columns are installed in the tunnel portal steel ring through the bolts and are respectively matched with the two sides of the tunnel portal steel ring, so that the tunnel portal structure for the left and right tunnel jacking pipes is formed successively, the jacking of the left and right tunnel jacking pipes can be constructed by using the tunnel portal steel ring, and the tunnel portal structure can meet the clearance requirement of the parallel pipe jacking pipe pushing machine.
And e, when the tunnel portal concrete structure is constructed in the step e, the middle upright post is reinforced and poured in the tunnel portal concrete structure, so that the stability of the tunnel portal is improved.
In addition, in this embodiment, the height of the tunnel portal steel ring is at least 6cm higher than the height of the push bench, and the width between the inner side wall of the tunnel portal steel ring forming the tunnel portal structure and the center pillar is at least 6cm higher than the width of the push bench, that is, an operation gap with a width of at least 3cm is reserved between the tunnel portal structure formed by the center pillar and the tunnel portal steel ring and the push bench. When the tunnel portal structure of the second top of the pipe-jacking tunnel is constructed, when the clear distance between two adjacent pipe joints in the transverse direction is smaller than the sum of the width of the middle upright post and the width of the operation gap, the middle upright post is partially overlapped with the pipe joint of the installed first top, so that the construction requirement of the tunnel portal structure of the second top is met.
As shown in fig. 3 to 6, the portal steel ring 1 includes a rectangular outer steel ring 11, a rectangular outer steel ring plate 12, and anchor bars 13, wherein one outer steel ring plate 12 is welded to each of two ends of the outer steel ring 11, a plurality of anchor bars 13 perpendicular to the outer steel ring plate are welded to the outer side wall of the outer steel ring 11, and a plurality of first screw holes are respectively formed in the middle of the top end and the middle of the bottom end of the outer steel ring plate 11. The center pillar 2 comprises a center pillar shell 21, center pillar rib plates 23 and connecting plates 22, wherein the center pillar shell 21 is welded with a plurality of center pillar rib plates 23, the upper end and the lower end of the center pillar shell 21 are respectively welded with one connecting plate 22, the connecting plates 22 are provided with a plurality of second screw holes, and the second screw holes and the first screw holes are connected through bolts to enable the center pillar 2 to be installed in the portal steel ring 1 so as to facilitate the disassembly and assembly of the center pillar. The position of the first screw hole is designed according to the spacing distance between the pipe joints, the size of the pipe jacking machine and the size of the middle column. Four corners of the steel outer ring 11 are rounded corners, one side of the middle upright post shell 21 is provided with a groove, and two ends of the groove are respectively rounded corners; when the middle upright post is arranged in the portal steel ring to form a portal structure, four corners of the portal are all rounded corners.
In this embodiment, a plurality of third screw holes are uniformly distributed on the steel outer ring plate 1, and a plurality of fourth screw holes are respectively arranged on the front surface and the back surface of the middle upright column shell 2, so as to install a one-way pressing plate, and the rubber waterproof curtain is pressed on the steel ring of the portal and the middle upright column by the one-way pressing plate, so that water is prevented from flowing out.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (10)
1. A tunnel portal construction method of a parallel pipe-jacking tunnel is characterized by comprising the following steps:
a. designing and assembling a portal steel ring and a middle upright post of the pipe-jacking tunnel;
b. constructing a tunnel door structure when a first top of the pipe-jacking tunnel is jacked;
c. completing jacking of the first top of the pipe-jacking tunnel, and then dismantling a tunnel portal structure at the first top of the pipe-jacking tunnel;
d. constructing a tunnel door structure when a second top of the pipe-jacking tunnel is constructed;
e. and (5) completing jacking of the second top of the pipe-jacking tunnel, and then constructing a tunnel portal concrete structure.
2. The hole door construction method according to claim 1, wherein the step a specifically comprises the following steps:
a1, designing the size of a tunnel portal steel ring and the size of a middle upright post according to the size of a push bench and the distance between tunnels;
a2, processing the steel plate and the anchor bars into a hole door steel ring according to the size of the designed hole door steel ring, and processing the steel plate into a center pillar according to the size of the designed center pillar.
3. The hole door construction method according to claim 2, wherein the step b specifically comprises the following steps:
b1, binding wall, column and beam steel bars at the tunnel portal of the jacking pipe;
b2, hoisting the portal steel ring to the portal of the pipe-jacking tunnel, and welding and positioning the anchor bars of the portal steel ring and the reinforcing steel bars at the portal of the pipe-jacking tunnel after adjusting the position;
b3, connecting the upper end and the lower end of the middle upright post with the portal steel ring by bolts respectively, so that a portal structure for constructing the first roof of the pipe-jacking tunnel is formed between the middle upright post and the portal steel ring;
b4, pouring concrete at the position of the steel ring of the tunnel door and at the rear part of the middle upright post;
b5, installing a rubber waterproof curtain and a one-way pressure plate on the tunnel door structure at the first top of the pipe-jacking tunnel.
4. The hole door construction method according to claim 3, wherein the step c specifically comprises the steps of:
c1, grouting and plugging the hole portal of the pipe joint and the top pipe tunnel after the first top jacking of the top pipe tunnel is finished;
c2, breaking the concrete at the rear part of the middle upright post of the first top-time hole structure of the top pipe tunnel, and finally removing the rubber waterproof curtain, the one-way pressing plate and the middle upright post of the first top-time hole structure of the top pipe tunnel.
5. The hole door construction method according to claim 4, wherein the step d specifically comprises the following steps:
d1, rotating the middle upright column by 180 degrees in the horizontal direction and positioning, and then respectively connecting the upper end and the lower end of the middle upright column with the portal steel ring by bolts to form a portal structure between the middle upright column and the portal steel ring when constructing the second roof of the pipe-jacking tunnel;
d2, arranging a water stop steel plate at the intersection of the middle upright post of the tunnel door structure at the second top of the pipe-jacking tunnel and the pipe joint at the first top of the pipe-jacking tunnel for water sealing;
d3, installing a rubber waterproof curtain and a one-way pressure plate on the tunnel door structure at the second top of the pipe-jacking tunnel.
6. The hole door construction method according to claim 5, wherein: and e, when the tunnel portal concrete structure is constructed in the step e, reinforcing the center pillar and pouring the center pillar into the tunnel portal concrete structure.
7. The hole door construction method according to any one of claims 1 to 6, wherein: the steel ring for the tunnel door comprises a rectangular steel outer ring, a rectangular steel outer ring plate and anchor bars, wherein the two ends of the steel outer ring are respectively welded with the steel outer ring plate, the outer side wall of the steel outer ring is welded with the anchor bars perpendicular to the steel outer ring, and the middle of the top end and the middle of the bottom end of the steel outer ring are respectively provided with a plurality of first screw holes.
8. The method of constructing a hole door of claim 7, wherein: the center pillar comprises a center pillar shell, center pillar rib plates and connecting plates, wherein the center pillar shell is welded with a plurality of center pillar rib plates, the upper end and the lower end of the center pillar shell are respectively welded with one connecting plate, the connecting plates are provided with a plurality of second screw holes, and the center pillar is arranged in the portal steel ring through the second screw holes and the first screw holes in a bolt connection mode.
9. The method of constructing a hole door of claim 8, wherein: four corners of the steel outer ring are rounded corners, one side of the middle upright post shell is provided with a groove, and two ends of the groove are respectively rounded corners.
10. The method of constructing a hole door of claim 8, wherein: and a plurality of third screw holes are uniformly distributed on the steel outer ring plate, and a plurality of fourth screw holes are respectively formed in the front and back of the middle upright shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110565247.8A CN113175329A (en) | 2021-05-24 | 2021-05-24 | Tunnel portal construction method for parallel pipe-jacking tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110565247.8A CN113175329A (en) | 2021-05-24 | 2021-05-24 | Tunnel portal construction method for parallel pipe-jacking tunnel |
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| Publication Number | Publication Date |
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| CN113175329A true CN113175329A (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110565247.8A Pending CN113175329A (en) | 2021-05-24 | 2021-05-24 | Tunnel portal construction method for parallel pipe-jacking tunnel |
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| CN108086996A (en) * | 2017-12-31 | 2018-05-29 | 中铁隧道集团二处有限公司 | The underground parking that pipe jacking tunnel is constructed the method for underground parking and constructed |
| CN207974833U (en) * | 2018-03-05 | 2018-10-16 | 北京市政建设集团有限责任公司 | A kind of concrete column and the branch-cut bridge section big cross section grid paving structure that punches |
| CN109026151A (en) * | 2018-10-17 | 2018-12-18 | 中铁隧道局集团有限公司 | Big cross section rectangular top pipe tunnel portal sealing device and its installation method |
| CN110593881A (en) * | 2019-09-17 | 2019-12-20 | 中铁第六勘察设计院集团有限公司 | Method for realizing large-section underground space excavation by using small-section combined jacking pipe |
| CN210370663U (en) * | 2019-07-25 | 2020-04-21 | 河南省豫北水利勘测设计院有限公司 | Parallel double-hole tunnel structure |
| CN111636878A (en) * | 2020-04-30 | 2020-09-08 | 广州地铁集团有限公司 | Pipe jacking construction method for double-hole door |
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2021
- 2021-05-24 CN CN202110565247.8A patent/CN113175329A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000104492A (en) * | 1998-09-29 | 2000-04-11 | Kajima Corp | Structure of connection part for shield tunnel |
| KR20040098322A (en) * | 2003-05-14 | 2004-11-20 | 김현경 | None open cut tunnelling of arch type with hume pipe and con'c rib |
| KR20080025478A (en) * | 2006-09-18 | 2008-03-21 | 김현경 | None open cut tunnelling method and tunnel |
| CN105484761A (en) * | 2015-04-16 | 2016-04-13 | 中铁隧道勘测设计院有限公司 | Lining structure of single-tube double-tunnel rectangular shield tunnel and assembly method thereof |
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