CN110939454A - Advanced geological prediction method for tunnel more than kilometer - Google Patents
Advanced geological prediction method for tunnel more than kilometer Download PDFInfo
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- CN110939454A CN110939454A CN201911113867.7A CN201911113867A CN110939454A CN 110939454 A CN110939454 A CN 110939454A CN 201911113867 A CN201911113867 A CN 201911113867A CN 110939454 A CN110939454 A CN 110939454A
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- tunnel
- horizontal directional
- directional drilling
- drilling machine
- side hole
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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
- E21D9/10—Making by using boring or cutting machines
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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
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
Abstract
The invention provides an advanced geological forecasting method for a tunnel more than kilometer, which comprises the following steps: s1, arranging a horizontal directional drilling machine at the exit or entrance of the tunnel, and performing horizontal directional drilling along the parallel line of the tunnel axis, wherein the drilling distance exceeding the excavation section of the tunnel reaches more than 1000 meters; s2, excavating construction is carried out along the axis of the tunnel, when the construction is carried out to a planned tunnel side hole, the tunnel side hole is excavated, the horizontal directional drilling machine is transported to the tunnel side hole, the horizontal directional drilling machine continuously drills along the direction of the parallel line of the axis of the tunnel, coring and detection are carried out, and geological data required by tunnel excavation construction are obtained; s3, repeating the step S2 for a plurality of times until the horizontal directional drilling machine drills the tunnel, and completing advanced forecasting of all geological data of the tunnel. The invention has the beneficial effects that: and performing high-precision ultra-long distance advanced geological drilling in the tunnel portal and the tunnel side hole to obtain detailed stratum parameters, and not causing any influence on tunnel construction.
Description
Technical Field
The invention relates to the field of geological exploration of tunnel engineering, in particular to an advanced geological forecasting method for a tunnel more than kilometers.
Background
With the rapid development of economy in China, the construction amount of underground space engineering such as roads, railway tunnels and the like in China is gradually increased year by year. The scheme determination of investment decision, line selection, construction method selection, equipment type selection and configuration, support form and parameters, construction period and cost and the like of tunnel engineering requires refined and accurate engineering geology, hydrogeology, rock mass parameters and other investigation data as support. These data can be obtained from two aspects: traditional engineering geological exploration methods and traditional advanced geological forecasting. In the traditional engineering geological exploration method, vertical holes which are arranged at intervals along the axis of a tunnel penetrate through an upper covering layer to drill to a stratum where the axis of the tunnel is located, and then the engineering characteristics of surrounding rock of the tunnel around the holes are evaluated. The advanced geological forecast is to carry out survey hole construction at the tunnel face to obtain the surrounding rock condition of the tunnel within a range of dozens of meters and hundreds of meters ahead. However, the traditional geological exploration method has the disadvantages of large unnecessary drilling workload, discontinuous exploration hole distribution, incapability of truly and comprehensively reflecting the geological characteristics of tunnel surrounding rocks, and being restricted by factors such as transportation, water supply, fields, personnel health, environmental protection and the like in areas with complicated landforms and severe environmental conditions, such as high-altitude mountain areas, unmanned areas with perennial accumulated snow and the like, is difficult to normally implement, and has very high comprehensive engineering cost; the detection depth of the advance geological forecast of the tunnel is shallow, the drilling direction is not controllable, the significance is not great for the rapid construction of the modern tunnel, the 'chicken ribs' are slightly displayed, the tunneling construction of the tunnel needs to be interrupted during the advance geological forecast construction, and the construction period and the cost are increased. Therefore, it is urgently needed to research a technology and a method which are fast and strong in adaptability and can carry out ultra-long-distance geological survey and forecast on the tunnel.
Disclosure of Invention
Aiming at the technical problem that the traditional advanced geological prediction is difficult to acquire meaningful survey data for construction in tunnel engineering, the embodiment of the invention provides an advanced geological prediction method for a tunnel over kilometers.
The embodiment of the invention provides an advanced geological prediction method for a tunnel more than kilometers, which comprises the following steps:
s1, arranging a horizontal directional drilling machine at the exit or entrance of the tunnel, and performing horizontal directional drilling on the tunnel excavation section along the parallel line of the tunnel axis, wherein the drilling distance exceeding the tunnel excavation section is more than 1000 m;
s2, excavating construction is carried out along the axis of the tunnel, when the construction is carried out to a planned tunnel side hole, the tunnel side hole is excavated, the horizontal directional drilling machine is transported to the tunnel side hole, the horizontal directional drilling machine is made to continuously drill along the parallel line direction of the axis of the tunnel, the position of the horizontal directional drilling machine, which is more than 1000 meters away from the tunnel side hole, is drilled, and coring and detection are carried out, so that geological data required by tunnel excavation construction are obtained;
s3, repeating the step S2 for multiple times until the horizontal directional drilling machine drills the tunnel, and the advanced prediction of all geological data of the tunnel along the axis is completed.
Further, in step S1, the horizontal directional drilling machine may perform coring and detection during the drilling process to obtain geological data required by the excavation construction within a distance of 1000 meters from the excavation section of the tunnel.
Further, when the tunnel is a double-hole tunnel, the tunnel side hole is a traffic passage.
Further, when the tunnel is a single-hole tunnel, the tunnel side hole is a tunnel side chamber.
Further, the drill rod of the horizontal directional drilling machine comprises a plurality of detachably connected drill rod sections.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the invention relates to a method for forecasting advance geology of a tunnel over kilometer, which is based on a horizontal directional drilling guide hole construction technology, carries out high-precision ultra-long distance (over kilometer) advance geology drilling in a tunnel entrance and a tunnel side hole, can carry out operations such as coring, well logging, field experiments and the like in the drilling process, obtains detailed stratum parameters, does not cause any influence on tunnel construction, and can preferentially process bad stratums if the bad stratums are found in the horizontal directional drilling advance geology forecasting process. Compared with the traditional advance geological forecast of the tunnel, the method has the following advantages:
(1) the advanced forecasting technology and the advanced forecasting method can realize parallel rapid drilling of kilometers or more along the axis of the tunnel, core taking and detection are carried out, and geological data with construction significance can be provided for rapid construction of the tunnel;
(2) the advanced forecasting technology and the advanced forecasting method can realize the survey while the tunnel is constructed, thereby greatly improving the comprehensive efficiency of tunnel construction;
(3) the advanced forecasting technology and the advanced forecasting method can obtain comprehensive and real tunnel surrounding rock information, solve the problems of small surface geophysical prospecting detection depth and insufficient representativeness of indexes of vertical drilling samples, greatly reduce the demand on the traditional geological drilling exploration and have remarkable technical advantages;
(4) the horizontal directional drilling machine is arranged at the tunnel entrance and the tunnel side hole, so that the equipment is prevented from being moved under complex terrains, and meanwhile, the rock parameters along the tunnel can be analyzed by combining an in-hole geophysical prospecting technology, so that the horizontal directional drilling machine has remarkable economic advantages.
Drawings
Fig. 1 is a schematic diagram of the advanced geological prediction method for over kilometers of a tunnel.
FIG. 2 is a schematic diagram of a method for advance geological prediction over kilometers for a double-tunnel;
FIG. 3 is a schematic diagram of a single-hole tunnel over kilometer advance geological prediction method.
In the figure: 1-tunnel, 2-horizontal directional drilling machine, 3-tunnel excavation section, 4-drill rod, 5-drill hole, 6-tunnel side hole, 7-vehicle channel and 8-tunnel side chamber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a method for advance geological prediction over kilometers of a tunnel, including the following steps:
s1 before the tunnel 1 is excavated, arranging a horizontal directional drilling machine 2 at the outlet or the inlet of the tunnel 1, wherein the arrangement position of the horizontal directional drilling machine 2 is determined according to the actual construction direction. And starting the horizontal directional drilling machine 2, so that the horizontal directional drilling machine 2 performs horizontal directional drilling along the parallel line of the axis of the tunnel 1, and the distance of drilling exceeding the tunnel excavation section 3 reaches more than 1000 meters to form a drilling hole 5 parallel to the axis of the tunnel 1. During the drilling process, coring and detection can be carried out through the drill rod 4 of the horizontal directional drilling machine 2, and further geological data required by excavation construction with the distance of more than 1000 meters from the tunnel excavation section 3 can be obtained.
S2, excavating along the axis of the tunnel 1, and detaching the drill rod 4 of the horizontal directional drilling machine 2 to avoid the drill rod 4 of the horizontal directional drilling machine 2 affecting the construction. When the tunnel side hole 6 is constructed to be planned, the tunnel side hole 6 is excavated, the horizontal directional drilling machine 2 is transported to the tunnel side hole 6, the horizontal directional drilling machine 2 is made to continuously drill along the parallel line direction of the axis of the tunnel 1, the position of the horizontal directional drilling machine 2, which is more than 1000 meters away from the tunnel side hole 6, is drilled, and core and detection are carried out, so that geological data required by the excavation construction of the tunnel 1 are obtained;
referring to fig. 2 and 3, the tunnel-side opening 6 is here a traffic lane 7 or a tunnel-side chamber 8. Specifically, when the tunnel side hole 6 is a double-hole tunnel, the tunnel side hole 6 is a vehicle-driving channel 7, and the horizontal directional drilling machine 2 is transported to the vehicle-driving channel 7 in the middle of the double-hole tunnel; when the tunnel is a single-hole tunnel, the tunnel side hole 6 is a tunnel side chamber 8, and the horizontal directional drilling machine 2 is transported to the tunnel side chamber 8 on one side of the single-hole tunnel; and (3) extending the drill rod 4 of the horizontal directional drilling machine 2 into the drill hole 5, continuing to drill along the direction of the drill hole 5, and disassembling the drill rod 4 of the horizontal directional drilling machine 2 after reaching a proper depth, and storing the drill rod in the vehicle-driving channel 7 or the tunnel side chamber 8 to prepare for the next tunnel 1 construction.
S3, repeating step S2 for many times until the horizontal directional drilling machine 2 drills through the tunnel 1, so that the horizontal directional drilling machine 2 drills forward at each tunnel side hole 6 to a depth exceeding 1000 meters from the tunnel side hole 6, that is, geological data required by excavation construction of the tunnel 1 beyond 6 kilometers from the tunnel side hole can be obtained at each tunnel side hole 6, and finally, advanced prediction of all geological data of the tunnel 1 along the axis is completed.
In order to facilitate the transportation of the horizontal directional drilling machine 2 in the tunnel 1 and the storage of the horizontal directional drilling machine 2 during the construction of the tunnel 1, the drill rod 4 of the horizontal directional drilling machine 2 is formed by detachably connecting multiple drill rod sections.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. An advanced geological forecasting method for more than one kilometer of a tunnel is characterized by comprising the following steps:
s1, arranging a horizontal directional drilling machine at the exit or entrance of the tunnel, and performing horizontal directional drilling on the tunnel excavation section along the parallel line of the tunnel axis, wherein the drilling distance reaches more than 1000 m;
s2, excavating construction is carried out along the axis of the tunnel, when the construction is carried out to a planned tunnel side hole, the tunnel side hole is excavated, the horizontal directional drilling machine is transported to the tunnel side hole, the horizontal directional drilling machine is made to continuously drill along the parallel line direction of the axis of the tunnel, the position of the horizontal directional drilling machine, which is more than 1000 meters away from the tunnel side hole, is drilled, and coring and detection are carried out, so that geological data required by tunnel excavation construction are obtained;
s3, repeating the step S2 for multiple times until the horizontal directional drilling machine drills the tunnel, and the advanced prediction of all geological data of the tunnel along the axis is completed.
2. The advanced geological prediction method for over kilometers of a tunnel as defined in claim 1, wherein: in the step S1, the horizontal directional drilling machine may perform coring and detection during the drilling process to obtain geological data required by the excavation construction within 1000 meters of the excavation section of the tunnel.
3. The advanced geological prediction method for over kilometers of a tunnel as defined in claim 1, wherein: and when the tunnel is a double-hole tunnel, the tunnel side hole is a vehicle driving channel.
4. The advanced geological prediction method for over kilometers of a tunnel as defined in claim 1, wherein: and when the tunnel is a single-hole tunnel, the tunnel side hole is a tunnel side chamber.
5. The advanced geological prediction method for over kilometers of a tunnel as defined in claim 1, wherein: the drill rod of the horizontal directional drilling machine comprises a plurality of sections of detachably connected drill rod sections.
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| CN201911113867.7A CN110939454A (en) | 2019-11-14 | 2019-11-14 | Advanced geological prediction method for tunnel more than kilometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352299A (en) * | 2021-12-31 | 2022-04-15 | 长江三峡勘测研究院有限公司（武汉） | Parallel advanced extra-deep geological prediction method under deep-buried long tunnel TBM (tunnel boring machine) construction condition |
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| CN110221340A (en) * | 2019-07-03 | 2019-09-10 | 武汉中科岩土工程有限责任公司 | A kind of set of tunneling construction method for forecasting advanced geology |
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- 2019-11-14 CN CN201911113867.7A patent/CN110939454A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101251605A (en) * | 2008-04-17 | 2008-08-27 | 中铁二局股份有限公司 | Method for forecasting advanced geology for tunnel construction |
| CN101270666A (en) * | 2008-05-16 | 2008-09-24 | 中铁十一局集团第四工程有限公司 | Tunnel stope front geological condition section-expanding horizontal drilling estimation and prediction method |
| CN202975361U (en) * | 2012-12-10 | 2013-06-05 | 山东大学 | Advance detection apparatus for unfavorable geology and rock mass mechanical property of deep and long tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352299A (en) * | 2021-12-31 | 2022-04-15 | 长江三峡勘测研究院有限公司（武汉） | Parallel advanced extra-deep geological prediction method under deep-buried long tunnel TBM (tunnel boring machine) construction condition |
| CN114352299B (en) * | 2021-12-31 | 2023-09-22 | 长江三峡勘测研究院有限公司（武汉） | Parallel advanced ultra-deep geological prediction method under construction condition of TBM (Tunnel boring machine) of deep-buried long tunnel |
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Application publication date: 20200331 |