CN113530560A - Pipe gallery construction method for shield first and well second - Google Patents
Pipe gallery construction method for shield first and well second Download PDFInfo
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- CN113530560A CN113530560A CN202110807599.XA CN202110807599A CN113530560A CN 113530560 A CN113530560 A CN 113530560A CN 202110807599 A CN202110807599 A CN 202110807599A CN 113530560 A CN113530560 A CN 113530560A
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- 238000010276 construction Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 56
- 239000004567 concrete Substances 0.000 claims abstract description 36
- 238000009412 basement excavation Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 12
- 230000002787 reinforcement Effects 0.000 claims abstract description 10
- 239000003365 glass fiber Substances 0.000 claims abstract description 8
- 230000005641 tunneling Effects 0.000 claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/10—Preparation of the ground
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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
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/06—Lining shafts; Linings therefor with iron or steel
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a shield-first well gallery-then-well gallery construction method, which comprises the following steps: 1) constructing a fender post of a vertical shaft foundation pit, wherein a shield penetrating range adopts a glass fiber reinforced pile; 2) the shield tunneling construction is carried out, the speed is reduced when the tunnel passes through the vertical shaft, duct pieces are spliced by adopting through seams, synchronous grouting and secondary grouting amount are increased at an interface, and the duct pieces positioned in the set length at the two sides of the vertical shaft are respectively tensioned and fixed; 3) in the shaft excavation construction, a concrete reinforcing support system is arranged at the top of the segment in the excavation process; after the pipe pieces are excavated until the pipe pieces are completely exposed, radial grouting reinforcement is carried out on the soil body around the foundation pit below the concrete reinforced support system; 4) after the reinforcement is finished, symmetrically removing the pipe pieces in the shaft foundation pit ring by ring and piece by adopting a negative ring pipe piece removing method; 5) and (4) supporting the segment dismantling section of the vertical shaft foundation pit, erecting a steel support system, and then continuing excavation of the foundation pit until the designed elevation is reached. By adopting the invention, the construction is safer and more efficient.
Description
Technical Field
The invention relates to a construction method of an underground comprehensive pipe gallery, in particular to a pipe gallery construction method of a shield-well-after-well.
Background
The utility tunnel is one of the important signs of the modern construction of the novel urban municipal infrastructure of the 21 st century, and the underground utility tunnel plays an important role in meeting the basic demands of the civilian life and improving the comprehensive bearing capacity of the city. After the pipe gallery is built, the problems of zipper on the road, spider web on the line, rainwater flood irrigation and the like can be effectively solved, and the underground veins of the city can be further opened. Eight kinds of pipelines such as water, electricity, communication, gas will all enter the corridor, and tens of kinds of intelligent technologies such as handheld terminal, remote monitoring, intelligent security will obtain using in the piping lane. However, many underground pipe galleries planned in old urban areas need to pass through densely populated living areas, urban arterial roads, river channels, bridges, and even need to pass through buildings and the like. The construction of such pipe galleries does not have open cut conditions in consideration of factors such as urban environment protection, reduction of influence on urban roads and municipal pipelines and the like. In order to further accelerate the construction speed and reduce the engineering risk, the shield method is adopted for construction. The construction technology of the pipe gallery shield method represents one direction in the field of construction of comprehensive pipe galleries in China. By adopting the shield construction method, the problems of dismantling and modifying urban road pipelines and buildings and conducting and modifying urban traffic are effectively solved, and meanwhile, the mechanical degree is high, the labor is saved, the capital investment is reduced, and the method is safe and reliable. The traditional shield tunnel is influenced by pipeline shifting and traffic guiding and changing in the construction of a first shaft and a second shield, and the shield can not normally tunnel and construct, so that the construction period of the whole line is influenced. In order to accelerate the construction progress and shorten the construction period, a shield pipe gallery construction method of firstly shielding and then well is generally adopted at present, moving and changing and traffic guiding and changing can be synchronously constructed with shield tunneling, and process shaft construction in an interval is carried out after the shield is communicated. However, after the shield tunnel is communicated in the construction of 'first shield and then well', the excavation support and the duct piece removal of the process shaft in the interval face larger safety risk, the duct piece removal effect is slow and the like, and the existing construction method is more complicated and has long construction period.
Disclosure of Invention
The invention provides a safe and efficient method for constructing a pipe gallery by using a shield-well-after-well method for solving the technical problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a shield-first well gallery-then-well gallery construction method comprises the following steps:
1) constructing a fender post of a vertical shaft foundation pit by a construction process, wherein a glass fiber reinforced pile is adopted in the penetration range of a shield tunnel;
2) performing shield tunneling construction, namely reducing the tunneling speed to cut glass fiber reinforced piles when the shield tunnel penetrates through the process shaft, splicing segments of the foundation pit section penetrating through the process shaft by adopting through seams, increasing synchronous grouting and secondary grouting quantity within the set length of the shield tunnel positioned at two sides of the process shaft so as to enhance the stability of soil at the interface of the shield tunnel and the foundation pit of the process shaft, and respectively tensioning and fixing the segments positioned within the set length of the two sides of the process shaft;
3) the process shaft is excavated, and in the excavation process, a concrete reinforcing support system is arranged at a set height away from the top of the pipe piece; after the concrete strength of the concrete reinforced support system reaches design requirements, performing lower-layer excavation until segments are completely exposed, and then performing radial grouting reinforcement on the soil body around the foundation pit below the concrete reinforced support system;
4) after the reinforcement is finished, symmetrically removing the duct pieces in the process shaft foundation pit ring by ring and piece by adopting a negative ring duct piece removing method;
5) and (4) supporting a segment dismantling section of the process shaft foundation pit, erecting a steel support system, and then continuing excavation of the foundation pit until the designed elevation is reached.
And 2) increasing synchronous grouting and secondary grouting amounts within the length range that the shield tunnel is located on two sides of the process vertical shaft and is not less than 20 m.
And 2), not less than 20 rings of the pipe piece are tensioned and fixed on one side of the process shaft.
And arranging a concrete reinforcing and supporting system at a position which is not more than 1.5m away from the top of the pipe piece.
The specific method of the step 4) comprises the following steps: 4.1) chiseling through the segment of the top sealing block, the adjacent block and the segment hoisting bolt hole of the standard block; 4.2) connecting a lifting ring I on the hoisting bolt hole, and connecting the lifting ring I on hoisting equipment; 4.3) chiseling the top sealing block along the abutted seam by using an air pick, and starting hoisting equipment to hoist the top sealing block out of the foundation pit; 4.4) arranging a lifting ring II and two horseshoe buckles on each pipe piece to form a triangular stable lifting point connected with a lifting steel wire rope, and lifting the pipe pieces to a specified place after chiseling the pipe pieces along the abutted seams by using an air pick.
The invention has the advantages and positive effects that: the comprehensive reinforcing and supporting method comprises the steps of increasing synchronous grouting and secondary grouting quantity at the interface of a shield tunnel and a process shaft when a shield is used, tensioning and fixing duct pieces positioned in set lengths on two sides of the process shaft respectively, arranging a concrete reinforcing and supporting system above the tops of the duct pieces when the process shaft is excavated, and performing radial grouting reinforcement on soil around a foundation pit below the concrete reinforcing and supporting system, so that the stability of the pit and the construction safety during the excavation of the process shaft and the removal of the duct pieces in the process shaft are ensured. The inner pipe pieces of the foundation pit are removed by adopting a negative ring pipe piece removing method, and the inner pipe pieces are lifted out ring by ring, block by block and integrally, so that the construction of 'first shield and then well' can be completed more safely and efficiently. In conclusion, the invention effectively solves the problems of the process shaft foundation pit stabilization and segment removal safety risk in the construction of shield-first and well-second. Compared with the existing construction method, the construction method is simple, quick and safe. The method has very important values in the aspects of accelerating the construction progress, guaranteeing the construction safety and the like, and can provide reference popularization values for similar projects.
Drawings
FIG. 1 is a schematic structural diagram of the concrete reinforced supporting system before the step 3) of the invention is constructed;
FIG. 2 is a schematic structural diagram of the step 3) of constructing a concrete reinforced supporting system according to the present invention;
FIG. 3 is a schematic structural diagram of the method of the invention after the pipe pieces are excavated in step 3) and the soil around the foundation pit below the concrete reinforced support system is reinforced by radial grouting;
FIG. 4 is a schematic structural diagram of the present invention during the construction in step 5);
FIG. 5 is a cross-sectional view of the concrete reinforcing support system of FIG. 2;
FIG. 6 is a cross-sectional view of a steel support of the present invention;
FIG. 7 is a schematic structural diagram of the construction completed in step 5) of the present invention.
In the figure: 1-1, reinforcing steel bar concrete pile; 1-2, piling glass fiber reinforced bars; 2-1, concrete crown beam; 2-2, a first concrete supporting system; 3-1, enclosing purlin with concrete; 3-2, supporting concrete; 3-3, concrete diagonal bracing; 4-1, steel purlin; 4-2, supporting steel; 4-3, steel diagonal bracing; 5. a duct piece; 6. and reinforcing the area.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
referring to fig. 1 to 7, a method for constructing a tunnel well pipe gallery after shield includes the following steps:
1) in the fender pile of the vertical shaft foundation pit in the construction process, the penetration range of the shield tunnel adopts the glass fiber reinforced piles 1-2, so that the shield tunnel is conveniently cut off during shield, and other fender piles adopt the reinforced concrete piles 1-1.
2) Shield tunneling construction, wherein when the process shaft is penetrated, the tunneling speed is reduced to cut the glass fiber reinforced piles 1-2, and segment segments 5 of a foundation pit penetrating the process shaft are spliced by adopting through seams so as to facilitate subsequent segment dismantling; and (3) increasing synchronous grouting and secondary grouting amount within the set length of the shield tunnel on two sides of the process shaft, wherein the set length is usually not less than 20m so as to enhance the stability of soil at the interface of the shield tunnel and the process shaft foundation pit and respectively tighten and fix the segments within the set length on two sides of the process shaft. The tensioning device is usually adopted to fasten the 20 ring pipe pieces close to the foundation pit on a construction site so as to prevent the pipe pieces close to the foundation pit from loosening when the pipe pieces in the foundation pit are dismantled. To ensure safety, the tube sheet on one side of the process shaft is fastened tightly for at least 20 rings. The soil body stabilizing measure and the segment tensioning and fixing measure are used for guaranteeing construction safety.
3) The process shaft excavation construction is characterized in that in the excavation process, a concrete reinforcing and supporting system 3 is arranged at a set height from the top of a duct piece, lower-layer excavation is carried out after the concrete strength of the concrete reinforcing and supporting system reaches design requirements, after the duct piece 5 is completely exposed, radial grouting reinforcement is carried out on the soil body around a process shaft foundation pit below the concrete reinforcing and supporting system 3, and the detailed process is as follows: 3.1) constructing a concrete crown beam 2-1 and a first concrete support 2-2; 3.2) excavating to the position of 1.5m of the top of the segment, excavating layer by adopting the principle of longitudinal segmentation, vertical layering, top-to-bottom and first support and later excavation during excavation, and supporting by adopting a steel support system; 3.3) constructing a concrete reinforced support system, which comprises a concrete purlin 3-1, a concrete support 3-2 and a concrete diagonal support 3-3; 3.4) continuing excavating the earthwork until the pipe piece 5 is exposed; 3.5) carrying out radial grouting reinforcement on the peripheral soil body to form a reinforced area 6. When the process shaft is excavated, the concrete reinforcing and supporting system above the segment removing section and the soil body reinforcing area of the segment removing section can ensure the safe and stable support of segment removal and foundation pit excavation.
4) And after the reinforcement is finished, symmetrically removing the duct pieces 5 in the process shaft foundation pit ring by ring and piece by adopting a negative ring duct piece removing method. The method adopted by the embodiment comprises the following steps: 4.1) chiseling through the segment of the top sealing block, the adjacent block and the segment hoisting bolt hole of the standard block; 4.2) connecting a lifting ring I on the hoisting bolt hole, and connecting the lifting ring I on hoisting equipment; 4.3) chiseling the top sealing block along the abutted seam by using an air pick, and starting hoisting equipment to hoist the top sealing block out of the foundation pit; 4.4) arranging a lifting ring II and two horseshoe buckles on each pipe piece to form a triangular stable lifting point connected with a lifting steel wire rope, and lifting the pipe pieces to a specified place after chiseling the pipe pieces along the abutted seams by using an air pick. And chiseling along the abutted seams by adopting an air pick, wherein on one hand, the force is removed, on the other hand, the removal of the sealing top block is facilitated, the adjacent block is removed after the sealing top block is removed, and finally, the standard blocks are removed in a ring-by-ring manner in this sequence and are removed along with the removal. Adopt lifting device when the section of jurisdiction is demolishd, demolish each section of jurisdiction wholly in order and lift out, ensure that the section of jurisdiction is demolishd safe swift.
5) And (4) supporting a segment dismantling section of the process shaft foundation pit, erecting a steel support system, and then continuing excavation of the foundation pit until the designed elevation is reached.
All the steel support systems comprise steel purlins 4-1, steel supports 4-2 and steel inclined struts 4-3.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (5)
1. A shield-first well gallery-then-well gallery construction method is characterized by comprising the following steps:
1) constructing a fender post of a vertical shaft foundation pit, wherein a glass fiber reinforced pile is adopted in the penetration range of the shield tunnel;
2) performing shield tunneling construction, namely reducing the tunneling speed to cut glass fiber reinforced piles when the tunnel passes through a vertical shaft, splicing segments of foundation pits of the vertical shaft by adopting through seams, increasing synchronous grouting and secondary grouting quantity within the set length of the shield tunnel at the two sides of the vertical shaft so as to enhance the stability of soil at the interface of the shield tunnel and the foundation pits of the vertical shaft, and respectively tensioning and fixing the segments within the set length of the two sides of the vertical shaft;
3) in the shaft excavation construction, a concrete reinforcing support system is arranged at a set height away from the top of the pipe piece in the excavation process; after the concrete strength of the concrete reinforced support system reaches design requirements, performing lower-layer excavation until segments are completely exposed, and then performing radial grouting reinforcement on the soil body around the foundation pit below the concrete reinforced support system;
4) after the reinforcement is finished, symmetrically removing the pipe pieces in the shaft foundation pit ring by ring and piece by adopting a negative ring pipe piece removing method;
5) and (4) supporting the segment dismantling section of the vertical shaft foundation pit, erecting a steel support system, and then continuing excavation of the foundation pit until the designed elevation is reached.
2. The shield-pipe gallery construction method according to claim 1, wherein the step 2) is to increase the amount of simultaneous grouting and secondary grouting in a length range of not less than 20m on both sides of the shaft of the shield tunnel.
3. The method for constructing a tunnel well corridor according to claim 1, wherein in step 2), the segment which is fastened and fixed on one side of the shaft is not less than 20 rings.
4. The method for constructing a tunnel well corridor according to the claim 1, wherein in the step 3), a concrete reinforcing and supporting system is arranged at the position which is not more than 1.5m away from the top of the segment.
5. The method for constructing a tunnel well corridor according to claim 1, wherein the concrete method of the step 4) is as follows: 4.1) chiseling through the segment of the top sealing block, the adjacent block and the segment hoisting bolt hole of the standard block; 4.2) connecting a lifting ring I on the hoisting bolt hole, and connecting the lifting ring I on hoisting equipment; 4.3) chiseling the top sealing block along the abutted seam by using an air pick, and starting hoisting equipment to hoist the top sealing block out of the foundation pit; 4.4) arranging a lifting ring II and two horseshoe buckles on each pipe piece to form a triangular stable lifting point connected with a lifting steel wire rope, and lifting the pipe pieces to a specified place after chiseling the pipe pieces along the abutted seams by using an air pick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110807599.XA CN113530560A (en) | 2021-07-16 | 2021-07-16 | Pipe gallery construction method for shield first and well second |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110807599.XA CN113530560A (en) | 2021-07-16 | 2021-07-16 | Pipe gallery construction method for shield first and well second |
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| Publication Number | Publication Date |
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| CN113530560A true CN113530560A (en) | 2021-10-22 |
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| CN202110807599.XA Pending CN113530560A (en) | 2021-07-16 | 2021-07-16 | Pipe gallery construction method for shield first and well second |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2042686A1 (en) * | 2007-09-27 | 2009-04-01 | Bochumer Eisenhütte Heintzmann GmbH & Co. KG | Elasticity element |
| CN105649647A (en) * | 2014-11-11 | 2016-06-08 | 粤水电轨道交通建设有限公司 | Dismounting method of negative ring duct piece in shield tunneling tunnel |
| CN107664035A (en) * | 2017-10-20 | 2018-02-06 | 中国建筑第八工程局有限公司 | The construction method of well after shield piping lane elder generation shield |
| CN108625884A (en) * | 2018-03-08 | 2018-10-09 | 中交第二航务工程局有限公司 | Closed intermediate ventilating shaft bears the construction method that endless tube piece is removed |
| CN110306592A (en) * | 2019-06-30 | 2019-10-08 | 天津市市政工程设计研究院 | It is a kind of elder generation shield after well underground pipe gallery construction method |
-
2021
- 2021-07-16 CN CN202110807599.XA patent/CN113530560A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2042686A1 (en) * | 2007-09-27 | 2009-04-01 | Bochumer Eisenhütte Heintzmann GmbH & Co. KG | Elasticity element |
| CN105649647A (en) * | 2014-11-11 | 2016-06-08 | 粤水电轨道交通建设有限公司 | Dismounting method of negative ring duct piece in shield tunneling tunnel |
| CN107664035A (en) * | 2017-10-20 | 2018-02-06 | 中国建筑第八工程局有限公司 | The construction method of well after shield piping lane elder generation shield |
| CN108625884A (en) * | 2018-03-08 | 2018-10-09 | 中交第二航务工程局有限公司 | Closed intermediate ventilating shaft bears the construction method that endless tube piece is removed |
| CN110306592A (en) * | 2019-06-30 | 2019-10-08 | 天津市市政工程设计研究院 | It is a kind of elder generation shield after well underground pipe gallery construction method |
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Application publication date: 20211022 |