CN110030000B - One-step-distance one-turn construction method for small-section tunnel - Google Patents
One-step-distance one-turn construction method for small-section tunnel Download PDFInfo
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- CN110030000B CN110030000B CN201910454066.0A CN201910454066A CN110030000B CN 110030000 B CN110030000 B CN 110030000B CN 201910454066 A CN201910454066 A CN 201910454066A CN 110030000 B CN110030000 B CN 110030000B
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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
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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
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/13—Devices for removing or hauling away excavated material or spoil; Working or loading platforms using hydraulic or pneumatic conveying means
Abstract
The invention discloses a one-step-distance one-turn construction method for a small-section tunnel, and belongs to the field of tunnel construction. The invention comprises the following steps: tunneling the tunnel face of the small-section tunnel forwards, performing primary support on the tunnel, and performing secondary lining concrete pouring on the bottom section of the tunnel which is constructed at the rear part; suspending the excavation of the tunnel face after the tunnel face is excavated and supported for a certain length, laying a conveying pump pipeline to the tunnel face from a side wall of the tunnel, excavating the tunnel bottom from the tunnel face, removing the waste slag at the tunnel bottom, and pouring tunnel bottom concrete back through the conveying pump pipeline until the tunnel bottom structure is constructed; continuing the tunneling of the front tunnel face and the construction of the rear secondary lining; and repeating the steps until the whole tunnel construction is completed. The invention avoids the mutual interference of tunnel face tunneling and tunnel bottom construction in the limited operation space of the small-section tunnel, so that the tunnel bottom and the tunnel face operation are not crossed, the operation efficiency and the construction progress are effectively improved, and the construction cost is reduced.
Description
Technical Field
The invention relates to the field of tunnel construction, in particular to a one-step-distance one-turn construction method for a small-section tunnel.
Background
At present, roads and railways are rapidly developing, wherein tunnel engineering is an important component in the construction of the roads and the railways, tunnel excavation is performed step by a plurality of procedures, and the tunnel excavation mainly comprises a plurality of procedures such as tunnel blasting excavation, earth and stone transportation, steel frame erection, net hanging, anchor spraying, waterproof layer laying, secondary lining construction and the like, and the construction of small-section tunnels always restricts the tunnel construction progress and even restricts the opening operation of the whole engineering. At present, a full-section method or a construction method for constructing a tunnel bottom by an upper step and a lower step is mainly adopted in building the tunnel at home, and the construction method is limited by process arrangement, narrow operation area and the like, so that tunnel face tunneling and tunnel bottom construction are mutually interfered, the construction progress is slow, and the construction cost is high.
Disclosure of Invention
The invention aims to provide a one-step-distance one-turn construction method for a small-section tunnel, which aims to solve the problems of slow construction progress and high construction cost of the existing small-section tunnel.
The technical scheme for solving the technical problems is as follows:
a one-step-distance one-turn construction method for a small-section tunnel sequentially comprises the following steps:
(S1): tunneling the tunnel face of the small-section tunnel forwards, performing primary support on the tunnel, and performing secondary lining concrete pouring on the bottom section of the tunnel which is constructed at the rear part;
(S2): stopping excavating the tunnel face after the tunnel face is excavated and supported for a certain length, laying a conveying pump pipeline on a side wall of the tunnel to the tunnel face, excavating the tunnel bottom from the tunnel face, removing the waste slag at the tunnel bottom, and pouring tunnel bottom concrete back through the conveying pump pipeline;
(S3): continuously excavating the tunnel bottom from the poured tunnel bottom, removing the waste slag of the tunnel bottom, and pouring tunnel bottom concrete through a delivery pump pipeline;
(S4): repeating the step (S3) until the tunnel bottom segment is connected in the step (S1),
(S5): paving steel plates on the tunnel bottom concrete poured finally in the step (S4), communicating a transport line from the tunnel opening to the tunnel face so as to recover the tunneling of the front tunnel face as soon as possible and continuously applying the rear secondary lining to the tunnel face;
(S6): the steps (S1) to (S5) are repeated until the entire tunnel construction is completed.
Preferably, the tunneling distance of the tunnel face in the step (S1) is 50m to 100 m.
Preferably, in the step (S1), the step on the tunnel face is excavated by a mining method.
Preferably, the preliminary bracing in the step (S1) is performed by a bracing method using a plurality of combinations of bolts, steel arches, and shotcrete.
The invention has the following beneficial effects:
according to the invention, the tunnel face and the tunnel bottom of the tunnel are separately constructed, so that mutual interference of tunnel face tunneling and tunnel bottom construction in a limited operation space of a small-section tunnel is avoided, the tunnel bottom and the tunnel face are free from intersection in operation, the operation efficiency and the construction progress of the tunnel bottom and the tunnel face are effectively improved, and the construction cost is reduced. Meanwhile, the condition of a conveying line leading to the tunnel face is effectively improved through the sectional construction of the tunnel bottom, and the service life of mechanical equipment such as slag conveying vehicles is prolonged. The working staff of the working face can have a rest period corresponding to the pouring time at the bottom of the tunnel every time the working staff works continuously for a period of time, so that the working staff can work efficiently, maintenance time is reserved for transport vehicles and mechanical equipment, and efficient work of the mechanical equipment is guaranteed.
Drawings
Fig. 1 is a schematic view of a tunnel longitudinal section structure in the construction step (S1) in embodiment 1 of the present invention;
fig. 2 is a schematic view of a tunnel longitudinal section structure in the construction step (S2) in embodiment 1 of the present invention;
FIG. 3 is a cross-sectional view of FIG. 2;
fig. 4 is a schematic view of a tunnel vertical section structure in the construction step (S3) in embodiment 1 of the present invention;
fig. 5 is a schematic view of a tunnel longitudinal section structure from the construction step (S4) to the step (S6) in embodiment 1 of the present invention.
In the figure: 1-palm surface; 2-step up; 3-descending a step; 4-primary support; 5-secondary lining; 6 conveying pump pipelines.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
A one-step-distance one-turn construction method for a small-section tunnel sequentially comprises the following steps:
(S1): the tunnel face 1 of the small-section tunnel is tunneled forwards for 100m, and the tunneling is carried out in a mode that the upper step 2 of the tunnel face 1 is excavated firstly and then the lower step 3 of the tunnel face 1 is excavated; simultaneously, constructing a primary support 4 for the tunnel, and performing secondary lining 5 concrete pouring on the bottom section of the tunnel constructed at the rear part;
(S2): suspending excavation of the tunnel face after the tunnel face is excavated and supported for a certain length, laying a delivery pump pipeline 6 to the tunnel face 1 from a side wall of the tunnel, excavating the tunnel bottom 15m from the tunnel face 1, removing the waste slag at the tunnel bottom, and pouring tunnel bottom concrete back along the tunnel face 1 through the delivery pump pipeline 6;
(S3): continuously excavating the tunnel bottom 15m from the poured tunnel bottom, removing the waste slag at the tunnel bottom, and pouring concrete to the tunnel bottom through the delivery pump pipeline 6;
(S4): repeating the step (S3) until the tunnel bottom segment is connected in the step (S1),
(S5): paving a steel plate on the tunnel bottom concrete poured finally in the step (S4), communicating a tunnel opening to a transportation line of the tunnel face 1 so as to recover the tunneling of the front tunnel face as soon as possible, and continuously applying the rear secondary lining 5 to the direction of the tunnel face 1;
(S6): the steps (S1) to (S5) are repeated until the entire tunnel construction is completed.
The tunnel face 1 and the tunnel bottom of the tunnel are separately constructed, so that mutual interference of tunnel face 1 tunneling and tunnel bottom construction in a limited operation space of the small-section tunnel is avoided, the tunnel bottom and the tunnel face 1 are free from crossing in operation, the operation efficiency and the construction progress of the tunnel bottom and the tunnel face 1 are effectively improved, and the construction cost is reduced. Meanwhile, the transportation line condition leading to the tunnel face 1 is effectively improved through the subsection construction of the tunnel bottom, and the service life of mechanical equipment such as slag transporting vehicles is prolonged. The working personnel of the working face 1 can have a rest period corresponding to the pouring time at the bottom of the tunnel every time the working personnel continuously work for a period of time, so that the working personnel can work efficiently, maintenance time is reserved for transport vehicles and mechanical equipment, and efficient work of the mechanical equipment is guaranteed.
Example 2
The tunnel extension construction method in the present embodiment without interrupting traffic is substantially the same as that in embodiment 1, except that the step 2 on the tunnel face 1 is excavated by the mining method in step (S1). And selecting the excavation mode of the soft part of the vault of the tunnel face 1 as adopting an air pick or a drilling and blasting method for excavation according to the stable condition of the surrounding rock, so that the disturbance and the damage of blasting to the vault are reduced to the maximum extent.
Example 3
The tunnel extension construction method without traffic interruption of this embodiment is basically the same as that of embodiment 1, except that the preliminary bracing 4 in the step (S2) may be braced by various combinations of anchor rods, steel arches, and shotcrete depending on the stability of the tunnel.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A one-step-distance one-turn construction method for a small-section tunnel is characterized by sequentially comprising the following steps of:
(S1): the tunnel face of the small-section tunnel is tunneled forwards in a mode of firstly excavating an upper step of the tunnel face and then excavating a lower step of the tunnel face, meanwhile, a primary support is applied to the tunnel, and secondary lining concrete pouring is performed on a rear tunnel bottom section which is applied;
(S2): suspending the excavation of the tunnel face after the tunnel face is tunneled and supported for a certain length, laying a conveying pump pipeline on a side wall of the tunnel to the tunnel face, excavating the tunnel bottom from the tunnel face, removing the waste slag at the tunnel bottom, and pouring tunnel bottom concrete back along the tunnel face through the conveying pump pipeline;
(S3): continuously excavating the tunnel bottom from the position of the cast tunnel bottom in front, removing the waste slag at the tunnel bottom, and pouring concrete to the tunnel bottom through a delivery pump pipeline;
(S4): repeating the step (S3) until the tunnel bottom segment is connected in the step (S1),
(S5): paving steel plates on the tunnel bottom concrete poured finally in the step (S4), communicating a transport line from the tunnel opening to the tunnel face so as to recover the tunneling of the front tunnel face as soon as possible and continuously applying the rear secondary lining to the tunnel face;
(S6): the steps (S1) to (S5) are repeated until the entire tunnel construction is completed.
2. The one-step one-turn construction method for a small-section tunnel according to claim 1, wherein the tunneling distance of the tunnel face in the step (S1) is 50m to 100 m.
3. The one-step and one-turn construction method for the small-section tunnel according to claim 1, wherein the step on the tunnel face is excavated by a mining method in the step (S1).
4. The one-step one-turn construction method for a small cross-section tunnel according to claim 1, wherein the preliminary bracing in the step (S1) is performed using a plurality of combined bracing methods of anchor rods, steel arches and shotcrete.
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| CN201910454066.0A CN110030000B (en) | 2019-05-29 | 2019-05-29 | One-step-distance one-turn construction method for small-section tunnel |
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| CN201910454066.0A CN110030000B (en) | 2019-05-29 | 2019-05-29 | One-step-distance one-turn construction method for small-section tunnel |
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| CN110030000B true CN110030000B (en) | 2020-06-16 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105131A (en) * | 2007-08-17 | 2008-01-16 | 中铁十二局集团有限公司 | Tunnel dredging method suitable for railway large section IV, V class rock tunnel |
| CN106869944A (en) * | 2017-02-14 | 2017-06-20 | 中国电建集团华东勘测设计研究院有限公司 | The extra small clear-distance tunnel construction method in underground interchange intersection under complex environment |
| CN108286920A (en) * | 2018-01-31 | 2018-07-17 | 中铁二十二局集团第工程有限公司 | A kind of implementation of Tunnel Blasting and excavation |
| CN108286442A (en) * | 2018-01-08 | 2018-07-17 | 中铁十二局集团有限公司 | Excavation method suitable for a Support System in Soft Rock Tunnels quick closure cyclization of two steps |
| CN109488347A (en) * | 2018-10-25 | 2019-03-19 | 浙江省隧道工程公司 | A kind of excavation construction method for special formation chamber |
| CN109751054A (en) * | 2019-03-27 | 2019-05-14 | 中铁隧道局集团有限公司 | Shape of a hoof large-section tunnel construction method |
-
2019
- 2019-05-29 CN CN201910454066.0A patent/CN110030000B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105131A (en) * | 2007-08-17 | 2008-01-16 | 中铁十二局集团有限公司 | Tunnel dredging method suitable for railway large section IV, V class rock tunnel |
| CN106869944A (en) * | 2017-02-14 | 2017-06-20 | 中国电建集团华东勘测设计研究院有限公司 | The extra small clear-distance tunnel construction method in underground interchange intersection under complex environment |
| CN108286442A (en) * | 2018-01-08 | 2018-07-17 | 中铁十二局集团有限公司 | Excavation method suitable for a Support System in Soft Rock Tunnels quick closure cyclization of two steps |
| CN108286920A (en) * | 2018-01-31 | 2018-07-17 | 中铁二十二局集团第工程有限公司 | A kind of implementation of Tunnel Blasting and excavation |
| CN109488347A (en) * | 2018-10-25 | 2019-03-19 | 浙江省隧道工程公司 | A kind of excavation construction method for special formation chamber |
| CN109751054A (en) * | 2019-03-27 | 2019-05-14 | 中铁隧道局集团有限公司 | Shape of a hoof large-section tunnel construction method |
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