CN113389555B - Construction protection method suitable for high-risk pipeline under undercut tunnel - Google Patents
Construction protection method suitable for high-risk pipeline under undercut tunnel Download PDFInfo
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- CN113389555B CN113389555B CN202110872151.6A CN202110872151A CN113389555B CN 113389555 B CN113389555 B CN 113389555B CN 202110872151 A CN202110872151 A CN 202110872151A CN 113389555 B CN113389555 B CN 113389555B
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- 238000010276 construction Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 54
- 230000002787 reinforcement Effects 0.000 claims abstract description 50
- 238000005516 engineering process Methods 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 14
- 239000003673 groundwater Substances 0.000 claims abstract description 12
- 239000002689 soil Substances 0.000 claims description 47
- 239000011435 rock Substances 0.000 claims description 24
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000009412 basement excavation Methods 0.000 claims description 10
- 238000005065 mining Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 3
- 238000004886 process control Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000005728 strengthening 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Environmental & Geological Engineering (AREA)
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A construction protection method suitable for a high-risk pipeline penetrating under a subsurface tunnel is disclosed, and is a construction protection technology for the deformation of an all-dimensional and whole-process control pipeline, which is formed by the combination of the subsurface tunnel penetrating under the high-risk pipeline, the ground surface pre-reinforcement of the bottom area of the high-risk pipeline, the tracking grouting reinforcement of the stratum at the bottom of the high-risk pipeline by combining an informatization construction means and the groundwater recharging measure. The technology related by the invention is mature, the operation is simple and convenient, and the technology has very important reference value and practical significance for the construction of the high-risk pipeline under the similar subway tunnel.
Description
Technical Field
The invention relates to the technical field of tunnel proximity construction, in particular to a construction protection method suitable for deformation control of a high-risk pipeline penetrating under a large-section subway undercut tunnel.
Background
Because the special environment of city tunnel construction often runs into the condition of crossing high risk pipeline under the tunnel, in order to reduce the influence of tunnel construction to the pipeline, the usual measure is mainly for strengthening advance support, select suitable excavation construction method, increase excavation tunnel pre-reinforcement measure, reinforcing excavation tunnel's primary support intensity, accelerate primary support ring and primary support back slip casting process etc. all expand around newly-built tunnel self, it is to restrain displacement changes such as ground pipeline through the settlement deformation of control oneself, be a passive protection scheme, in case high risk pipeline etc. appear continuously the deformation trend, through taking the measure of stopping excavation, interim roof, in-hole reinforcement etc. come stable newly-built tunnel deformation development, and then delay pipeline deformation trend, this process is complicated promptly, duration is long and the result is uncontrollable, probably can seriously influence the safety of pipeline. Therefore, how to safely and reliably pull down important pipelines in tunnel construction, especially how to pull down high-risk pipelines in large-section undercut tunnels in urban sensitive environments, is clearly a great technical problem to be solved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a construction protection method suitable for deformation control of a high-risk pipeline penetrating under a large-section subway undercut tunnel, and a series of active protection measures are added besides the passive protection scheme. Before the high-risk pipeline enters the possible construction influence range of the undercut tunnel, shallow pre-grouting is carried out on the bottom of the pipeline through the ground, so that the performance (compressibility) of the rock and soil is improved, the deformation resistance of the rock and soil is improved, and the vertical displacement of the pipeline in the construction process is further limited; before the high-risk pipeline is penetrated under the underground tunnel, deep pre-grouting is carried out on the arch part of the tunnel through the underground tunnel, so that the homogeneity of the rock and soil is improved, the anti-sinking tensile shear stress of the rock and soil is improved, and the sinking deformation of the underground tunnel and the high-risk pipeline is further limited; in the process of penetrating a high-risk pipeline under a subsurface tunnel, an informationized construction means is adopted, a sleeve valve pipe tracking grouting process is adopted from the ground to a stratum with a certain plane and depth range of the pipeline, and the displacement change of the pipeline is actively controlled. Meanwhile, a pressurizing recharging technology is adopted in the construction process, so that the underground water level around the pipeline is maintained, compression deformation generated by water loss consolidation of a weak stratum is reduced, and the pipeline is quickly settled.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the construction protection method suitable for the underpass high-risk pipeline of the underpass tunnel comprises the following steps of pre-reinforcing the bottom area of the high-risk pipeline by the underpass tunnel of the underpass high-risk pipeline, carrying out tracking grouting reinforcement on the bottom stratum of the high-risk pipeline by combining an informatization construction means and carrying out an omnibearing construction protection technology for controlling the deformation of the pipeline in the whole process, wherein the construction protection technology comprises the following steps:
1) Before the section of high-risk pipeline (1) does not enter the construction influence range of the undercut tunnel (6), shallow pre-grouting reinforcement (4) is carried out on the high-risk pipeline (1) through the ground (2) in advance, so that the homogeneity and the compressibility of the rock and soil are improved, the anti-sinking tensile shear stress of the rock and soil is improved, and the vertical deformation of the pipeline in the construction process is limited;
2) After the shallow pre-grouting reinforcement (4) of the section of high-risk pipeline (1) is completed, recharging wells (3) are arranged at two sides of the high-risk pipeline (1) in a certain range through the ground (2);
3) Before the underground tunnel (6) is penetrated down, after the shallow layer pre-grouting reinforcement (4) is completed, deep layer pre-grouting reinforcement (7) of stratum at the bottom of the pipeline is carried out through the tunnel face of the underground tunnel (6), so that the homogeneity of the rock and soil is improved, the anti-sinking tensile shear stress of the rock and soil is improved, and the sinking deformation of the underground tunnel and the high-risk pipeline is further limited;
4) In the downward passing process of the undercut tunnel (6), an informationized construction means is adopted, the ground (2) is used for carrying out inclined sleeve valve pipe tracking grouting (5) on the stratum at the bottom of the high-risk pipeline (1), rock and soil which is deformed in displacement are reinforced in time, and then the vertical displacement of the high-risk pipeline (1) is controlled.
The shallow pre-reinforcement (4) at the bottom of the high-risk pipeline is that a vertical sleeve valve pipe grouting process is adopted to perform pre-grouting reinforcement on a stratum with a certain plane and a certain depth range outside the high-risk pipeline (1) from the ground (2).
The deep pre-reinforcement (7) of the bottom of the high-risk pipeline is to pre-slurry the stratum with a certain range of the tunnel arch part through the undercut tunnel (6), and single-liquid slurry or double-liquid slurry is injected through a horizontal drilling grouting process.
The high-risk pipeline tracking grouting reinforcement (5) is to perform tracking grouting reinforcement on a stratum with a certain plane and a depth range at the bottom of the high-risk pipeline (1) by adopting an inclined sleeve valve pipe tracking grouting process from the ground (2).
The pressurized recharging technology is characterized in that recharging wells (3) are arranged on certain plane ranges on two sides of a high-risk pipeline (1) from the ground (2) so as to maintain the groundwater level around the pipeline.
Before the high-risk pipeline (1) does not enter the construction influence range of the undercut tunnel (6), the high-risk pipeline (1) is generally more than 2d (the hole diameter of the undercut tunnel (6)) from the plane of the face of the undercut tunnel (6).
The bottom of the high risk pipeline (1) is provided with a shallow hole for grouting reinforcement (4), and the reinforcement depth is required to penetrate through a high compressibility soft soil layer (9) and a residual soil layer and a full weathering layer which are sensitive to water loss. In the reinforcing process, the grouting pressure and the grouting amount are strictly controlled by combining the monitoring data.
The recharging wells (3) are arranged on two sides of the high-risk pipeline (1), and the plane distance of the recharging wells (3) is not less than 3-5 m from the outer side of the shallow pre-grouting reinforcement (4) so as to avoid the situation that the recharging wells enter the reinforcement body and cannot be subjected to pressurized recharging; the high-compressibility soft soil layer (9) is penetrated vertically to enter the permeable residual soil layer and the completely weathered layer; the ground water level is maintained within 1m and above the high-compressibility soft soil layer (9).
The underground mining pipeline is characterized in that oblique sleeve valve pipe tracking grouting (5) is carried out on a stratum at the bottom of the high-risk pipeline (1) through the ground (2), sleeve valve pipes are laid in advance before the underground mining tunnel (6) is worn down, the position of a pipe laying plane is combined with the actual situation of the high-risk pipeline (1), the distance is generally more than 3m outside the high-risk pipeline (1), sleeve valve pipe tracking grouting is carried out in the underground mining tunnel (6) in the process of wearing down, and the grouting depth range is from the bottom of the high-risk pipeline (1) to the position of penetrating through a high-compressibility soft soil layer (9) and entering into a residual soil layer and a full weathered layer. In the reinforcing process, the grouting pressure and the grouting amount are strictly controlled by combining the monitoring data.
The informatization construction means comprises monitoring items such as stress monitoring and displacement monitoring of the high-risk pipeline (1), ground subsidence of the undercut tunnel (6), groundwater level, in-hole subsidence, convergence and the like.
Compared with the prior art, the invention has the following advantages:
the invention provides a construction protection method suitable for a high-risk pipeline penetrating under a subsurface tunnel, which is characterized in that a series of active protection measures are added on the basis of passive protection measures of a conventional design scheme, and the high-risk pipeline is subjected to shallow pre-grouting through the ground to the bottom of the pipeline before entering the possible construction influence range of the subsurface tunnel, so that the vertical displacement of the pipeline in the construction process is limited; before the high-risk pipeline is penetrated under the underground tunnel, deep pre-grouting is carried out on the arch part of the tunnel through the underground tunnel, so that settlement deformation of the underground tunnel and the high-risk pipeline is limited; in the process of penetrating a high-risk pipeline under a subsurface tunnel, an informationized construction means is adopted, a sleeve valve pipe tracking grouting process is adopted from the ground to a stratum with a certain plane and depth range of the pipeline, and the displacement change of the pipeline is actively controlled. Meanwhile, a pressurizing recharging technology is adopted in the construction process, so that the underground water level around the pipeline is maintained, compression deformation generated by water loss consolidation of a weak stratum is reduced, and the pipeline is quickly settled.
Drawings
Fig. 1 is a schematic view of the construction process of the present invention.
Wherein, in the figure: (1) -a high risk pipeline; (2) -a ground surface; (3) -recharging the well; (4) -shallow pre-grouting reinforcement of the bottom stratum of the high risk pipeline; (5) -high risk pipeline diagonal sleeve valve pipe follow grouting; (6) -undercut the tunnel; (7) -deep pre-grouting reinforcement of the underground tunnel vault stratum; (8) -a filling layer; (9) -a high compressibility soft soil layer; a residual soil layer sensitive to water loss and a fully weathered layer; strong, apoplexy-causing layer of the low compressibility; i.e. the ground water level.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a construction protection method suitable for a high-risk pipeline penetrating under a subsurface tunnel includes pre-reinforcing a bottom area of the high-risk pipeline by the subsurface tunnel penetrating under the high-risk pipeline, tracking grouting reinforcement on a stratum at the bottom of the high-risk pipeline by combining an informationized construction means, and an omnibearing and whole-process control pipeline deformation construction protection technology jointly composed of groundwater recharging measures, and is characterized by comprising the following steps:
1) Before the section of high-risk pipeline (1) does not enter the construction influence range of the undercut tunnel (6), shallow pre-grouting reinforcement (4) is carried out on the high-risk pipeline (1) through the ground (2) in advance, so that the homogeneity and the compressibility of the rock and soil are improved, the anti-sinking tensile shear stress of the rock and soil is improved, and the vertical deformation of the pipeline in the construction process is limited;
2) After the shallow pre-grouting reinforcement (4) of the section of high-risk pipeline (1) is completed, recharging wells (3) are arranged at two sides of the high-risk pipeline (1) in a certain range through the ground (2);
3) Before the underground tunnel (6) is penetrated down, after the shallow layer pre-grouting reinforcement (4) is completed, deep layer pre-grouting reinforcement (7) of stratum at the bottom of the pipeline is carried out through the tunnel face of the underground tunnel (6), so that the homogeneity of the rock and soil is improved, the anti-sinking tensile shear stress of the rock and soil is improved, and the sinking deformation of the underground tunnel and the high-risk pipeline is further limited;
4) In the downward passing process of the undercut tunnel (6), an informationized construction means is adopted, the ground (2) is used for carrying out inclined sleeve valve pipe tracking grouting (5) on the stratum at the bottom of the high-risk pipeline (1), rock and soil which is deformed in displacement are reinforced in time, and then the vertical displacement of the high-risk pipeline (1) is controlled.
The shallow pre-reinforcement (4) at the bottom of the high-risk pipeline is that a vertical sleeve valve pipe grouting process is adopted to perform pre-grouting reinforcement on a stratum with a certain plane and a certain depth range outside the high-risk pipeline (1) from the ground (2).
The deep pre-reinforcement (7) of the bottom of the high-risk pipeline is to pre-slurry the stratum with a certain range of the tunnel arch part through the undercut tunnel (6), and single-liquid slurry or double-liquid slurry is injected through a horizontal drilling grouting process.
The high-risk pipeline tracking grouting reinforcement (5) is to perform tracking grouting reinforcement on a stratum with a certain plane and a depth range at the bottom of the high-risk pipeline (1) by adopting an inclined sleeve valve pipe tracking grouting process from the ground (2).
The pressurized recharging technology is characterized in that recharging wells (3) are arranged on certain plane ranges on two sides of a high-risk pipeline (1) from the ground (2) so as to maintain the groundwater level around the pipeline.
Before the high-risk pipeline (1) does not enter the construction influence range of the undercut tunnel (6), the high-risk pipeline (1) is generally more than 2d (the hole diameter of the undercut tunnel (6)) from the plane of the face of the undercut tunnel (6).
The bottom of the high risk pipeline (1) is provided with a shallow hole for grouting reinforcement (4), and the reinforcement depth is required to penetrate through a high compressibility soft soil layer (9) and a residual soil layer and a full weathering layer which are sensitive to water loss. In the reinforcing process, the grouting pressure and the grouting amount are strictly controlled by combining the monitoring data.
The recharging wells (3) are arranged on two sides of the high-risk pipeline (1), and the plane distance of the recharging wells (3) is not less than 3-5 m from the outer side of the shallow pre-grouting reinforcement (4) so as to avoid the situation that the recharging wells enter the reinforcement body and cannot be subjected to pressurized recharging; the high-compressibility soft soil layer (9) is penetrated vertically to enter the permeable residual soil layer and the completely weathered layer; the ground water level is maintained within 1m and above the high-compressibility soft soil layer (9).
The underground mining pipeline is characterized in that oblique sleeve valve pipe tracking grouting (5) is carried out on a stratum at the bottom of the high-risk pipeline (1) through the ground (2), sleeve valve pipes are laid in advance before the underground mining tunnel (6) is worn down, the position of a pipe laying plane is combined with the actual situation of the high-risk pipeline (1), the distance is generally more than 3m outside the high-risk pipeline (1), sleeve valve pipe tracking grouting is carried out in the underground mining tunnel (6) in the process of wearing down, and the grouting depth range is from the bottom of the high-risk pipeline (1) to the position of penetrating through a high-compressibility soft soil layer (9) and entering into a residual soil layer and a full weathered layer. In the reinforcing process, the grouting pressure and the grouting amount are strictly controlled by combining the monitoring data.
The informatization construction means comprises monitoring items such as stress monitoring and displacement monitoring of the high-risk pipeline (1), ground subsidence of the undercut tunnel (6), groundwater level, in-hole subsidence, convergence and the like.
Before the section of high-risk pipeline does not enter the construction influence range of the underground tunnel, shallow pre-grouting reinforcement is carried out on a stratum with a certain plane and a depth range of the high-risk pipeline from the ground by adopting a vertical sleeve valve pipe grouting process, so that the performance of rock and soil is improved, the deformation resistance of the rock and soil is improved, and the vertical displacement of the pipeline in the construction process is further limited; before the high-risk pipeline is penetrated under the underground tunnel, deep pre-grouting is carried out on the arch part of the tunnel through the underground tunnel, and cement-water glass double-liquid slurry is injected through a forward or backward grouting process, so that the homogeneity of the rock and soil is improved, the anti-sinking tensile shear stress of the rock and soil is improved, and the sinking deformation of the underground tunnel and the high-risk pipeline is further limited; in the process of penetrating a high-risk pipeline under a subsurface tunnel, an informationized construction means (pipeline displacement point monitoring and stress monitoring) is adopted, and an inclined sleeve valve pipe tracking grouting process is adopted for a stratum with a certain plane and depth range between two lines of the pipeline from the ground, so that rock and soil with displacement deformation are reinforced in time, and further, the vertical displacement of the pipeline is controlled; meanwhile, the pressurizing recharging technology is adopted in a matched mode, recharging wells are arranged on two sides of the high-risk pipeline in a certain range, the underground water level around the pipeline is maintained, the underground water level change caused by water loss in the underground excavation construction is reduced, the weak stratum is solidified, compressed and deformed, and the pipeline is caused to be quickly settled. The technology related by the invention is mature, the operation is simple and convenient, and the technology has very important reference value and practical significance for the construction of the high-risk pipeline under the similar subway tunnel.
Claims (5)
1. The construction protection method suitable for the underpass high-risk pipeline of the underpass tunnel comprises the following steps of pre-reinforcing the bottom area of the high-risk pipeline by the underpass tunnel of the underpass high-risk pipeline, carrying out tracking grouting reinforcement on the bottom stratum of the high-risk pipeline by combining an informatization construction means and carrying out an omnibearing construction protection technology for controlling the deformation of the pipeline in the whole process, wherein the construction protection technology comprises the following steps:
1) Before the section of high-risk pipeline (1) does not enter the construction influence range of the undercut tunnel (6), shallow pre-grouting reinforcement (4) is carried out on the high-risk pipeline (1) through the ground (2) in advance, so that the homogeneity and the compressibility of the rock and soil are improved, the anti-sinking tensile shear stress of the rock and soil is improved, and the vertical deformation of the pipeline in the construction process is limited;
2) After the shallow pre-grouting reinforcement (4) of the section of high-risk pipeline (1) is completed, recharging wells (3) are arranged at two sides of the high-risk pipeline (1) in a certain range through the ground (2);
3) Before the underground tunnel (6) is penetrated down, after the shallow layer pre-grouting reinforcement (4) is completed, deep layer pre-grouting reinforcement (7) of stratum at the bottom of the pipeline is carried out through the tunnel face of the underground tunnel (6), so that the homogeneity of the rock and soil is improved, the anti-sinking tensile shear stress of the rock and soil is improved, and the sinking deformation of the underground tunnel and the high-risk pipeline is further limited;
4) In the downward passing process of the underground excavation tunnel (6), an informationized construction means is adopted, inclined sleeve valve pipe tracking grouting (5) is carried out on the stratum at the bottom of the high-risk pipeline (1) through the ground (2), rock and soil with displacement deformation are reinforced in time, and then the vertical displacement of the high-risk pipeline (1) is controlled;
the high-risk pipeline tracking grouting reinforcement (5) is to perform tracking grouting reinforcement on a stratum with a certain plane and a depth range at the bottom of the high-risk pipeline (1) from the ground (2) by adopting an inclined sleeve valve pipe tracking grouting process;
the pressurized recharging technology is that recharging wells (3) are arranged on certain plane ranges on two sides of a high-risk pipeline (1) from the ground (2) so as to maintain the groundwater level around the pipeline;
before the high-risk pipeline (1) does not enter the construction influence range of the undercut tunnel (6), the high-risk pipeline (1)2 times the diameter of the undercut tunnel (6) is generally arranged at the face plane of the undercut tunnel (6);
the recharging wells (3) are arranged on two sides of the high-risk pipeline (1), and the plane distance of the recharging wells (3) is not less than 3-5 m from the outer side of the shallow pre-grouting reinforcement (4) so as to avoid the situation that the recharging wells enter the reinforcement body and cannot be subjected to pressurized recharging; the high-compressibility soft soil layer (9) is penetrated vertically to enter the permeable residual soil layer and the completely weathered layer; the overall ground water level is maintained within 1m, and the variation amplitude is positioned above a high-compressibility soft soil layer (9);
the underground mining pipeline is characterized in that oblique sleeve valve pipe tracking grouting (5) is carried out on a stratum at the bottom of the high-risk pipeline (1) through the ground (2), sleeve valve pipes are laid in advance before the underground mining tunnel (6) is penetrated down, the position of a pipe laying plane is combined with the actual situation of the on-site high-risk pipeline (1), the distance is generally more than 3m outside the high-risk pipeline (1), sleeve valve pipe tracking grouting is carried out in the underground mining tunnel (6) penetrating down, the grouting depth range is from the bottom of the high-risk pipeline (1) to the position of penetrating through a high-compressibility soft soil layer (9) and entering into a residual soil layer and a full weathered layer, and grouting pressure and grouting quantity are strictly controlled by combining monitoring data in the reinforcing process.
2. The construction protection method suitable for the underground excavation tunnel to penetrate through the high-risk pipeline according to claim 1, wherein the shallow pre-reinforcement (4) of the bottom of the high-risk pipeline is performed by pre-grouting reinforcement of a stratum with a certain plane and depth range outside the high-risk pipeline (1) from the ground (2) through a vertical sleeve valve pipe grouting process.
3. The construction protection method suitable for the underpass high risk pipeline of the undercut tunnel according to claim 1, wherein the deep pre-reinforcement (7) of the bottom of the high risk pipeline is to pre-grouting a stratum with a certain range of the arch part of the tunnel through the undercut tunnel (6), and single-liquid slurry or double-liquid slurry is injected through a horizontal drilling grouting process.
4. The construction protection method for the underpass high risk pipeline of the underground excavation tunnel according to claim 1, wherein the shallow hole is reserved for grouting reinforcement (4) at the bottom of the high risk pipeline (1), the reinforcement depth is required to penetrate through a high-compressibility soft soil layer (9) and a residual soil layer and a full weathering layer which are more sensitive to water loss, and in the reinforcement process, the grouting pressure and grouting amount are strictly controlled by combining monitoring data.
5. The construction protection method suitable for the underground excavation tunnel to penetrate through the high-risk pipeline according to claim 1, wherein the informationized construction means comprise monitoring items such as stress monitoring and displacement monitoring of the high-risk pipeline (1), ground subsidence of the underground excavation tunnel (6), ground water level, in-hole subsidence, convergence and the like.
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