CN112696201A - Shield tunnel connecting channel steel pipe sheet tapping and hole sealing construction method - Google Patents
Shield tunnel connecting channel steel pipe sheet tapping and hole sealing construction method Download PDFInfo
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- CN112696201A CN112696201A CN202011581120.7A CN202011581120A CN112696201A CN 112696201 A CN112696201 A CN 112696201A CN 202011581120 A CN202011581120 A CN 202011581120A CN 112696201 A CN112696201 A CN 112696201A
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- concrete
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 78
- 239000010959 steel Substances 0.000 title claims abstract description 78
- 238000010276 construction Methods 0.000 title claims abstract description 48
- 238000007789 sealing Methods 0.000 title claims abstract description 36
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 11
- 230000008014 freezing Effects 0.000 claims abstract description 51
- 238000007710 freezing Methods 0.000 claims abstract description 51
- 238000005553 drilling Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004891 communication Methods 0.000 claims abstract description 14
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 9
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims abstract description 9
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims abstract description 9
- 235000009120 camo Nutrition 0.000 claims abstract description 9
- 235000005607 chanvre indien Nutrition 0.000 claims abstract description 9
- 239000011487 hemp Substances 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000004576 sand Substances 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 7
- 239000004927 clay Substances 0.000 description 7
- 239000002689 soil Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- GQCYCMFGFVGYJT-UHFFFAOYSA-N [AlH3].[S] Chemical compound [AlH3].[S] GQCYCMFGFVGYJT-UHFFFAOYSA-N 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a construction method for tapping and sealing holes of steel pipe pieces of a shield connection channel, which comprises the steps of firstly filling steel pipe piece bins of holes required to be tapped in a shield tunnel by adopting C30 sulphoaluminate micro-expansion concrete in the tapping construction process of the steel pipe pieces of the shield connection channel, drilling holes in the filled C30 sulphoaluminate micro-expansion concrete by using a fixed drilling machine after the filled C30 sulphoaluminate micro-expansion concrete is solidified, loading a hole opening pipe wound with hemp filaments, and then performing drilling construction and subsequent freezing hole sealing construction. The method effectively avoids the situation that the installation deviation of the orifice pipe is large in the process of tapping the steel pipe sheet of the conventional communication channel, effectively prevents the dangerous situations of water leakage and sand leakage which are easy to occur in the process of tapping, and avoids the risk in the process of hole sealing.
Description
Technical Field
The invention relates to a construction method of a steel pipe sheet of a shield tunnel connection channel, in particular to a construction method of tapping and hole sealing of the steel pipe sheet of the shield tunnel connection channel.
Background
The soil layer surface layer of the Shanghai area takes silt clay as a main part, the deep layer takes sandy clay as a main part, and the soil layer at the position of the communication channel has large tension and high water content. The shield tunnel connection channel construction mainly adopts freezing construction. When a traditional freezing method is used for drilling holes on a steel pipe sheet, a hole opening pipe is installed firstly, C30 sulfur-aluminum micro-expansion concrete is filled in the hole opening pipe, a 6mm thick steel plate needs to be welded on a drilling bin lattice for plugging, after the concrete is solidified, the hole drilling construction is carried out, a freezing pipe is installed, after freezing, the 6mm plugging steel plate needs to be cut off firstly when the hole sealing construction of a freezing hole is carried out, and a 12mm thick steel plate needs to be welded after C30 sulfur-aluminum micro-expansion concrete is filled in the hole sealing construction. The traditional construction method is easy to cause leakage in the drilling stage, the deviation is easy to be larger when the orifice pipe is installed firstly, more gaps need to be plugged in the subsequent hole sealing process, and the dangerous case of water leakage and sand leakage is easy to occur.
Aiming at the situation, in order to reduce the difficulty of the drilling construction positioning of the steel pipe sheet and prevent the dangerous situations of water leakage and sand leakage in the process of opening and sealing the hole of the steel pipe sheet, the invention is urgently needed to provide a construction method for opening and sealing the steel pipe sheet of the shield tunnel connection channel.
Disclosure of Invention
The invention provides a method for perforating and sealing a steel pipe sheet of a shield tunnel connection channel, which aims to reduce the difficulty of drilling construction positioning of the steel pipe sheet and prevent water and sand leakage in the perforating and sealing process of the steel pipe sheet.
In order to achieve the purpose, the technical scheme of the invention is as follows: a shield tunnel contact channel steel pipe piece tapping and hole sealing construction method comprises the steps that firstly, steel pipe piece bins are filled with concrete fully before tapping of steel pipe pieces, after the concrete is solidified, a fixed drilling machine is adopted for drilling holes, concrete core samples are taken out after the holes are drilled to the steel pipe pieces, and hole opening pipes are installed, so that tapping accuracy can be well guaranteed, and further, the installation accuracy of the hole opening pipes is guaranteed; and after the freezing holes are constructed, performing freezing construction, and after the freezing construction is finished, performing cutting-off and hole sealing construction on the hole pipe and the freezing pipe.
Further, the step of filling the steel pipe piece bin grids with concrete before the steel pipe pieces are perforated is that the steel pipe piece bin grids are filled with sulphoaluminate micro-expansion concrete, so that the phenomenon that filling is not compact due to the fact that the hole opening pipes are fixed and then filled in a conventional perforating method can be avoided.
Furthermore, fixed rig is fixed desk-top rig, and its base adopts expansion bolts to fix on the concrete surface of filling a warehouse, can be according to the accurate fixed of design pore-forming angle, and the hole of beating and the deviation of design angle are little, and the drilling diameter is greater than the orifice pipe diameter 4 mm.
Furthermore, before the orifice pipe is installed, hemp threads are wound at the front end of the orifice pipe, the width of the hemp threads is 100mm, the thickness of the hemp threads is larger than or equal to 5mm, gaps between the holes formed by the fixed drilling machine and the orifice pipe can be effectively filled, and the hemp threads are replaced by water stop rubber or similar materials.
Further, after the orifice pipe is installed, the orifice pipe is fixed by a steel plate with the thickness of 10mm, the annular gap between the orifice pipe and the fixed steel plate and the gap between the fixed steel plate and the rib plate of the steel pipe sheet are all fully welded, the height of each welding line is more than or equal to 8mm, the lap joint length of the fixed steel plate and the rib plate of the steel pipe sheet is more than or equal to 2cm, and the rib plate with the thickness of 10mm is added at the joint position of the orifice pipe and the fixed steel plate for reinforcement.
Further, when the freezing pipe is sealed, in order to avoid a gap between the orifice pipe and the fixed steel plate in a conventional hole opening method, the freezing pipe and the gap between the orifice pipe and the freezing pipe are only required to be sealed.
Further, the shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1 is characterized in that: when the freezing pipes are sealed, the depression angle freezing pipes are filled with sulphoaluminate micro-expansion concrete, the elevation angle freezing pipes are filled with sulphoaluminate micro-expansion concrete, and the filling depth is more than or equal to 3 m.
Furthermore, the concrete is C30 or sulphoaluminate micro-expansion concrete with more than C30, the volume of the concrete slightly expands in the solidification process, and the concrete can well fill the gaps in the steel pipe sheet bin grids and meet the required strength requirement.
Furthermore, after the freezing pipe is driven into the freezing pipe, a grouting valve reserved in the orifice pipe is used for grouting the annular space between the orifice pipe and the freezing pipe.
Further, during the freezing pipe cutting and hole sealing construction, the freezing pipe is cut to the depth of the filled concrete which is not less than 60mm, and the freezing pipe abandoned in the stratum is filled with the C30 sulphoaluminate micro-expansive concrete with the strength of not less than C30.
The invention has the beneficial effects that:
according to the invention, C30 sulphoaluminate micro-expansion concrete filling is firstly carried out on the steel pipe sheet bin before the installation of the orifice pipe, then a fixed drilling machine is installed on the filled concrete for punching, and the orifice pipe is installed. Meanwhile, in the subsequent hole sealing construction process, only the orifice pipe needs to be cut off and the freezing pipe needs to be exposed, and the steel plate is used for welding, so that the difficulty and time of hole sealing construction are greatly reduced, and the risk that water gushing and sand gushing are easily generated due to stratum thawing is reduced.
The method can effectively prevent the drilling deviation, the water and sand leakage danger and the water and sand leakage danger in the connection channel hole sealing process of the shield tunnel in the process of drilling the steel pipe sheet.
Drawings
FIG. 1 is a flow chart of the construction of the present invention;
FIG. 2 is a schematic illustration of the steel pipe sheet concrete filling of the present invention;
FIG. 3 is a schematic view of the stationary drill installation of the present invention;
FIG. 4 is a schematic view of an orifice tube installation of the present invention;
FIG. 5 is a schematic diagram of the freeze pipe drilling operation of the present invention;
FIG. 6 is a schematic illustration of freeze hole filling of the present invention;
FIG. 7 is a schematic view of the construction of the frozen hole sealing of the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
As shown in fig. 1 to 7, the method for constructing the holes and the holes of the steel pipe sheet of the shield tunnel communication channel comprises the steps of filling concrete into a steel pipe sheet bin, perforating the filled concrete, installing a hole pipe with a hemp thread wound at the front end, welding and fixing the hole pipe by using a steel plate, and reinforcing the hole pipe by using a web plate. And then, drilling a freezing pipe, after freezing is finished, only cutting off the orifice pipe and the freezing pipe, filling concrete left in the stratum with the concrete, and then welding and plugging with a steel plate.
In this embodiment, before the installation of the orifice pipe, the steel pipe piece bin lattice is filled with concrete, the orifice pipe is installed and welded and fixed by steel plates after the filled concrete is drilled, the web is reinforced, then the installation construction of the freezing pipe drilling, the freezing construction and the hole sealing construction of the orifice pipe cutting are performed. The specific method comprises the following steps:
(1) the filling bin lattice concrete is C30 sulphoaluminate micro-expansion concrete, so that the strength requirement can be met, and the gaps in the bin lattices can be effectively filled.
(2) Adopt fixed rig drilling, fixed rig is fixed desk-top rig 1, and its base adopts expansion bolts 2 to fix on the concrete surface of filling in a warehouse, sees figure 3, can be according to designing the accurate fixed of pore-forming angle, and the hole of beating and design angular deviation are little, and the drilling diameter is greater than the orifice pipe diameter 4 mm. The diameter of the filled concrete drill hole is 4mm larger than the diameter of the orifice pipe, and the depth is based on the drill bit touching the steel pipe sheet.
(3) The front part of the orifice pipe is wound with hemp threads 3, the width is 100mm, and the thickness is not less than 5m, as shown in figure 4.
(4) After the orifice pipe is installed, a rib plate of a steel pipe sheet is welded by a fixed steel plate 4 with the thickness of 10mm, the lap joint length is not less than 20mm, and 3 triangular rib plates with the thickness of 10mm are welded and reinforced, as shown in figure 4.
(5) After drilling is finished, the orifice pipe is fixed by a steel plate and a steel pipe sheet compartment, then a pressing device 5 is installed, see fig. 5, filling and grouting are carried out on an annular space between the orifice pipe and the freezing pipe, single-liquid slurry (water cement ratio is 1: 1), then double-liquid slurry (water cement ratio is 1: 1, cement slurry is 1: 1), and the volume of the single-liquid slurry is not less than 0.2m3。
(6) The thickness of the used annular steel plate is 10 mm.
(7) And cutting off the orifice pipe and the freezing pipe until the inner part of the concrete is not less than 60 mm.
(8) The freezing pipe is filled with C30 sulphoaluminate micro-expansion concrete 6, as shown in figure 6, wherein the depression angle freezing pipe is filled with concrete, and the filling depth of the elevation angle concrete is not less than 3 m.
(9) The thickness of the hole sealing welding steel plate 7 is 10mm, and the figure is 7.
(10) All welding adopts full welding, and the thickness of the welding seam is not less than 8 mm.
(11) During grouting, grouting pressure and grouting amount are controlled in a double mode, the grouting pressure meets grouting requirements and is not more than twice of water and soil pressure of the opening, and single-fluid grouting amount is not less than 0.2m3And the grouting amount of the double-fluid slurry is based on the field requirement.
The invention relates to a construction method for perforating and sealing steel pipe sheets of a tunnel connecting channel by a shield method.
The method is applied to the shield zone communication channel engineering of the newly built engineering of the certain river-crossing tunnel in the Shanghai. The tunnel shield section connecting channel is located in soil layers of silty clay, silty clay and clay silty clay with silty clay, the soil layer close to the bottom is sandy silty soil and is located at the bottom of Huangpu river, the located stratum has certain hydraulic connection with river water, water and sand protrusion and stratum settlement or even river water inflow can occur during construction, and the engineering risk is high. The water leakage condition occurs in the freezing pipe drilling process, the retest and design deviation of the freezing pipe is larger, and then the construction method provided by the invention is adopted, the water leakage and sand leakage condition does not occur in the subsequent drilling construction process, and the deviation of the freezing pipe is obviously reduced.
Claims (10)
1. A shield tunnel contact channel steel pipe sheet tapping and hole sealing construction method is characterized in that: firstly, filling the steel pipe piece bin with concrete fully before the steel pipe piece is perforated, drilling holes by using a fixed drilling machine after the concrete is solidified, taking out a concrete core sample after the holes are drilled to the steel pipe piece, and mounting a hole pipe, so that the perforating precision can be well ensured, and the mounting precision of the hole pipe is further ensured; and after the freezing holes are constructed, performing freezing construction, and after the freezing construction is finished, performing cutting-off and hole sealing construction on the hole pipe and the freezing pipe.
2. The shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1, characterized in that: the steel pipe piece bin lattice is filled with concrete before the steel pipe piece is perforated, namely the steel pipe piece bin lattice is filled with sulphoaluminate micro-expansion concrete, so that the phenomenon that filling is not compact due to the fact that the hole opening pipe is fixed firstly and then filled in a conventional punching method can be avoided.
3. The shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1, characterized in that: the fixed drilling machine is a fixed table drilling machine, a base of the fixed drilling machine is fixed on the surface of the filling concrete by expansion bolts, the hole forming angle can be accurately fixed according to the design, the deviation between the punched hole and the design angle is small, and the diameter of the drilled hole is larger than the diameter of the orifice pipe by 4 mm.
4. The shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1, characterized in that: before the orifice pipe is installed, hemp threads are wound at the front end of the orifice pipe, the width is 100mm, the thickness is larger than or equal to 5mm, gaps between the holes formed by the fixed drilling machine and the orifice pipe can be effectively filled, and the hemp threads are replaced by water stop rubber or similar materials.
5. The shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1, characterized in that: after the orifice pipe is installed, the orifice pipe is fixed by adopting a steel plate with the thickness of 10mm, an annular gap between the orifice pipe and the fixed steel plate and a gap between the fixed steel plate and a rib plate of the steel pipe sheet are all fully welded, the height of each welding line is more than or equal to 8mm, the lap joint length of the fixed steel plate and the rib plate of the steel pipe sheet is more than or equal to 2cm, and the rib plate with the thickness of 10mm is added at the joint position of the orifice pipe and the fixed steel plate for reinforcement.
6. The shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1, characterized in that: when the freezing pipe is sealed, in order to avoid a gap between the orifice pipe and the fixed steel plate in the conventional hole opening method, the freezing pipe and the gap between the orifice pipe and the freezing pipe are only required to be sealed.
7. The shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1, characterized in that: when the freezing pipes are sealed, the depression angle freezing pipes are filled with sulphoaluminate micro-expansion concrete, the elevation angle freezing pipes are filled with sulphoaluminate micro-expansion concrete, and the filling depth is more than or equal to 3 m.
8. The shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1, characterized in that: the concrete is C30 or sulphoaluminate micro-expansion concrete with more than C30, the volume of the concrete slightly expands in the solidification process, and the concrete can well fill the gaps in the steel tube sheet bin grids and meet the required strength requirement.
9. The shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1, characterized in that: and after the freezing pipe is driven into the freezing pipe, grouting should be performed on the annular space of the freezing pipe and the orifice pipe by using the orifice pipe reserved grouting valve.
10. The shield tunnel communication channel steel pipe sheet perforating and hole sealing construction method according to claim 1, characterized in that: during the freezing pipe cutting and hole sealing construction, the freezing pipe is cut to the depth of the filled concrete which is not less than 60mm, and the freezing pipe abandoned in the stratum is filled with the C30 sulphoaluminate micro-expansive concrete with the strength of not less than.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011581120.7A CN112696201A (en) | 2020-12-28 | 2020-12-28 | Shield tunnel connecting channel steel pipe sheet tapping and hole sealing construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011581120.7A CN112696201A (en) | 2020-12-28 | 2020-12-28 | Shield tunnel connecting channel steel pipe sheet tapping and hole sealing construction method |
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| CN112696201A true CN112696201A (en) | 2021-04-23 |
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| CN202011581120.7A Pending CN112696201A (en) | 2020-12-28 | 2020-12-28 | Shield tunnel connecting channel steel pipe sheet tapping and hole sealing construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738382A (en) * | 2021-10-10 | 2021-12-03 | 中铁广州工程局集团有限公司 | Subway communication channel construction method based on freezing method |
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| CN104832180A (en) * | 2015-04-20 | 2015-08-12 | 北京中煤矿山工程有限公司 | Subway interconnecting passage freezing method construction high-efficiency auxiliary cooling method |
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| CN108590695A (en) * | 2018-05-30 | 2018-09-28 | 中山大学 | Service channel shield construction method and service channel |
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- 2020-12-28 CN CN202011581120.7A patent/CN112696201A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738382A (en) * | 2021-10-10 | 2021-12-03 | 中铁广州工程局集团有限公司 | Subway communication channel construction method based on freezing method |
| CN113738382B (en) * | 2021-10-10 | 2024-01-30 | 中铁广州工程局集团有限公司 | Subway communication channel construction method based on freezing method |
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Application publication date: 20210423 |
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