CN111577297A - Deviation rectifying method for upward drifting of shield machine posture in upper-soft and lower-hard mudstone composite stratum - Google Patents
Deviation rectifying method for upward drifting of shield machine posture in upper-soft and lower-hard mudstone composite stratum Download PDFInfo
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- CN111577297A CN111577297A CN202010451868.9A CN202010451868A CN111577297A CN 111577297 A CN111577297 A CN 111577297A CN 202010451868 A CN202010451868 A CN 202010451868A CN 111577297 A CN111577297 A CN 111577297A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002131 composite material Substances 0.000 title claims abstract description 10
- 230000005641 tunneling Effects 0.000 claims abstract description 49
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000002829 reductive effect Effects 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 8
- 235000019353 potassium silicate Nutrition 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 230000036961 partial effect Effects 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0621—Shield advancing devices
-
- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
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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)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a deviation rectifying method for upward drifting of the posture of a shield machine in a shield machine with a soft upper layer and a hard mudstone composite stratum, which comprises the following steps: firstly, when a shield machine starts tunneling in a soft-upper hard mudstone stratum, stopping using all first oil cylinders positioned at the lower part of a propulsion system of the shield machine, using part of second oil cylinders positioned at the right side of the propulsion system, and turning a plane curve to the right along a tunneling direction; step two, the tunneling speed of the shield tunneling machine is reduced from 50mm/min to 10mm/min-20 mm/min; injecting double-liquid slurry above the second annular duct piece after the shield tail is removed in the tunneling process; injecting double-liquid slurry into the periphery of the fourth ring segment after the first ring is tunneled within a circle after the fourth ring segment is removed from the shield tail to form a water stop ring; and step five, repeating the step one to the step four, and recovering normal tunneling when the deviation of the front point of the vertical attitude is about minus 45 mm. The posture deviation rectifying effect of the shield tunneling machine is good, and the assembling quality of the duct pieces can be guaranteed to meet the standard requirement.
Description
Technical Field
The invention relates to a shield tunneling technology, in particular to a deviation rectifying method for upward drifting of a shield machine in a composite stratum of upper soft and lower hard mudstone.
Background
With the rapid development of urban construction cause in China, the urbanization process is accelerated, urban population is highly concentrated, ground traffic is crowded, and subways become important transportation tools for people to go out.
The shield construction method is a "shield" (referred to as a supporting segment) for constructing (laying) a tunnel while a heading machine is heading, and is different from an open construction method. The shield is used as a tunnel construction method with higher mechanization degree to become an important means for developing urban underground space, and the application universality of the shield is self-evident.
The attitude of the shield machine is the most critical process for controlling the tunnel forming linearity and is also the basis for the shield machine manipulator to control the propelling subarea pressure. Tunneling in a small curve or large slope linear area is difficult in shield construction, and attitude control is more difficult when the soil texture is uneven and a stratum with too soft or too hard soil texture is tunneled.
Referring to fig. 1, the upper part of a certain upper soft lower hard mudstone stratum is a strong wind exchange (soft stratum) 5-2 which has a decreasing trend along the tunneling direction of the tunnel, the lower part of the upper soft lower hard mudstone stratum is a medium weathered mudstone (hard stratum) 5-3 which has an increasing trend along the tunneling direction, the linearity of the tunnel is a downgrade along the tunneling direction, and the gradient is 2.42%. Through analysis, when the shield machine passes through the upper soft and lower hard mudstone stratum for shield construction, the shield machine is easy to float upwards, particularly, the shield machine is more difficult to control in the region where the increasing trend of harder geology and the linear course of the tunnel are in reverse change, and the problem that the segment assembling quality is not in accordance with the standard requirement due to poor posture correcting effect can occur according to normal tunneling correcting measures.
To this end, it is desirable to seek a solution that at least alleviates the above problems.
Disclosure of Invention
The invention aims to provide a deviation rectifying method for upward drifting of the posture of a shield machine in a composite stratum of upper soft and lower hard mudstone, which has a good deviation rectifying effect on the posture of the shield machine.
The technical scheme of the invention for realizing the purpose is as follows:
a deviation rectifying method for upward drifting of a shield machine posture in a composite stratum of upper soft and lower hard mudstone comprises the following steps:
firstly, when a shield machine starts to tunnel in a soft-upper hard mudstone stratum, stopping using all or part of oil cylinders positioned at the lower part of a propulsion system of the shield machine to reduce the pressure at the lower part of the propulsion system and increase the propulsion pressure difference of an upper subarea and a lower subarea of the propulsion system; the partial oil cylinder positioned on the right side of the shield machine propulsion system stops being used to increase the propulsion pressure difference of the left and right subareas of the propulsion system, and the plane curve turns right along the tunneling direction so as to enable the vertical posture of the shield machine to be in a downward trend;
step two, the tunneling speed of the shield tunneling machine is reduced from 50mm/min to 10mm/min-20 mm/min;
injecting double-liquid slurry above the second annular duct piece after the shield tail is removed in the tunneling process;
step four, after one ring of tunneling is finished, injecting double-liquid slurry into the periphery of the fourth ring pipe piece after the fourth ring pipe piece is removed from the tail of the shield for one circle to form a water stop ring;
and step five, repeating the step one to the step four, and recovering normal tunneling when the deviation of the vertical attitude front point of the shield tunneling machine is about minus 45 mm.
The double-liquid slurry comprises the following components in percentage by mass: 1.
in the third step, 420 kilograms of cement of 380-420 kilograms is injected into each ring, and the grouting is finished or stopped when the front half of each ring is tunneled, so that the synchronous slurry solidification is accelerated.
The beneficial technical effects of the invention are as follows:
by adopting the deviation rectifying method, the deviation rectifying method increases the subarea pressure difference by stopping using all or part of oil cylinders at the lower part of the shield machine propulsion system and part of oil cylinders at the right side of the shield machine propulsion system, reduces the tunneling speed at the same time, and combines secondary grouting (cement and water glass) to form a water stop ring and firm lining segment, thereby realizing the purposes of deviation rectifying and tunnel quality control in the shield construction process of the upper soft and lower hard mudstone stratum. The shield machine has good posture deviation rectifying effect, and can ensure that the segment assembling quality meets the standard requirement.
Drawings
FIG. 1 is a schematic diagram of a geological change and tunnel linear longitudinal plane diagram structure according to the present invention.
Fig. 2 is a schematic view of an operation interface of the shield tunneling machine according to the present invention.
Fig. 3 is a schematic view of monitoring during vertical attitude heave control according to the present invention.
Fig. 4 is a schematic diagram of the relative positions of the duct piece and the shield machine according to the present invention.
Fig. 5 is a schematic view of a water stop ring according to the present invention.
FIG. 6 is a schematic diagram of monitoring of a vertical attitude after deviation rectification by the present invention.
Detailed Description
The following examples are given to illustrate the present invention and it is necessary to point out here that the following examples are given only for the purpose of further illustration of the invention and are not to be construed as limiting the scope of the invention.
Referring to fig. 1-5, an embodiment of the invention is a method for correcting the upward drift of the attitude of a shield tunneling machine in a composite formation of upper soft and lower hard mudstone.
Fig. 1 is a schematic structural diagram of geological changes and a tunnel linear longitudinal plane diagram related to the invention, wherein the upper part of the upper soft hard mudstone stratum shown in fig. 1 is a strong wind exchange (soft stratum) 5-2 which has a decreasing trend along the tunneling direction, the lower part of the upper soft hard mudstone stratum is a medium weathered mudstone (hard stratum) 5-3 which has an increasing trend along the tunneling direction, the tunnel linear is a downgrade along the tunneling direction, and the gradient is 2.42%. Through analysis, when the shield machine passes through the upper soft and lower hard mudstone stratum for shield construction, the attitude of the shield machine is easy to float upwards, particularly, the attitude control of the shield machine is more difficult in an area where the increasing trend of harder geology and the linear course of the tunnel are in reverse change, and the problem that the segment assembling quality does not meet the standard requirement due to poor attitude deviation correcting effect can occur according to normal tunneling deviation correcting measures, which is shown in figure 3. Therefore, the deviation rectifying method for upward drifting of the shield machine posture in the shield machine with the soft upper layer and the hard lower layer comprises the following steps:
when a shield machine starts to tunnel in a soft-upper hard mudstone stratum, stopping using all oil cylinders positioned at the lower part of a propulsion system of the shield machine to reduce the pressure at the lower part of the propulsion system and increase the propulsion pressure difference of an upper subarea and a lower subarea of the propulsion system; the partial oil cylinder positioned on the right side of the shield machine propulsion system stops being used to increase the propulsion pressure difference of the left and right subareas of the propulsion system, and the plane curve turns right along the tunneling direction so as to enable the vertical posture of the shield machine to be in a downward trend; wherein, the position indicated by the reference numeral 5 in fig. 2 is the pressure at the lower part of the propulsion system, the position indicated by the reference numeral 4 in fig. 2 is the pressure at the upper part of the propulsion system, and the oil cylinder represented by the position indicated by the reference numeral 1 in fig. 2 is in a stop state; in fig. 2, the cylinder represented by the position indicated by the reference numeral 2 is not used, and the cylinder represented by the other part on the right side which is not marked with the position is in a use state; except the oil cylinder of the shield machine propulsion system, other oil cylinders of the shield machine propulsion system are in a use state;
step two, the tunneling speed of the shield tunneling machine is reduced from 50mm/min to 10mm/min-20 mm/min; in fig. 2, the position indicated by the heading speed reference numeral 3 indicates the heading speed of the shield machine, which schematically shows that the heading speed is 15 mm/min;
step three, injecting double-liquid slurry above the second ring segment 7 after the shield tail 6 is removed in the tunneling process, and referring to fig. 4;
step four, injecting double-liquid slurry into the periphery of the fourth ring segment 11 which is separated from the shield tail 6 by one circle after one ring of tunneling is completed to form a water stop ring 9, and referring to fig. 4 and 5; such as injecting a double fluid slurry through the slurry injection holes 8; in fig. 5, reference numeral 10 indicates an excavation sideline of the shield tunneling machine;
and step five, repeating the step one to the step four, and recovering normal tunneling when the deviation of the vertical posture front point of the shield tunneling machine is-45 mm to-47 mm, referring to fig. 2 and 4-6.
In the first step, a part of oil cylinders positioned at the lower part of the propulsion system of the shield tunneling machine can be stopped to reduce the pressure at the lower part of the propulsion system, so that the propulsion pressure difference of the upper and lower subareas of the propulsion system is increased.
The upper, lower, left and right in the upper, lower, left and right subareas refer to the upper, lower, left and right directions presented in fig. 2, which does not limit the scope of the present invention. The four straight lines 12 in fig. 2 divide the circular interface map indicating the propulsion system related parameters into 4 sectors, upper, lower, left, right, etc.
By adopting the deviation rectifying method, the deviation rectifying trend of the vertical posture can be completed by tunneling five rings, normal tunneling is recovered when the sixth ring is tunneled, and the tunnel forming deviation is controlled within +100mm under the condition that the posture of the mudstone stratum floats seriously, as shown in figure 6.
The components of the double-liquid slurry comprise cement and water glass, wherein the mass ratio of the cement to the water glass is 1: 1.
in the third step, 420 kilograms of cement of 380-420 kilograms is injected into each ring, and the grouting is finished or stopped when the front half of each ring is tunneled, so that the synchronous slurry solidification is accelerated.
It should be noted that the various features described in the foregoing embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in any further detail in order to avoid unnecessary repetition.
The present invention has been described in detail with reference to the embodiments, which are illustrative rather than restrictive, and variations and modifications thereof are possible within the scope of the present invention without departing from the general inventive concept.
Claims (3)
1. A deviation rectifying method for upward drifting of a shield machine posture in a shield machine of a mud-rock composite stratum with soft upper part and hard lower part is characterized by comprising the following steps:
firstly, when a shield machine starts to tunnel in a soft-upper hard mudstone stratum, stopping using all or part of oil cylinders positioned at the lower part of a propulsion system of the shield machine to reduce the pressure at the lower part of the propulsion system and increase the propulsion pressure difference of an upper subarea and a lower subarea of the propulsion system; the partial oil cylinder positioned on the right side of the shield machine propulsion system stops being used to increase the propulsion pressure difference of the left and right subareas of the propulsion system, and the plane curve turns right along the tunneling direction so as to enable the vertical posture of the shield machine to be in a downward trend;
step two, the tunneling speed of the shield tunneling machine is reduced from 50mm/min to 10mm/min-20 mm/min;
injecting double-liquid slurry above the second ring pipe piece (7) after the shield tail (6) is removed in the tunneling process;
step four, after one ring of tunneling is finished, injecting double-liquid slurry into the periphery of the fourth ring pipe piece (11) which is removed from the tail of the shield within a circle to form a water stop ring (9);
and step five, repeating the step one to the step four, and recovering normal tunneling when the deviation of the vertical attitude front point of the shield tunneling machine is about minus 45 mm.
2. The method for correcting the upward drift of the posture of the shield tunneling machine in the shield tunneling machine with the upper soft and the lower hard mudstone composite stratum according to claim 1, wherein the components of the double-liquid slurry comprise cement and water glass, and the mass ratio of the cement to the water glass is 1: 1.
3. the method for correcting the upward drift of the shield tunneling machine in the shield tunneling machine for the composite stratum of the upper soft and the lower hard mudstone as claimed in claim 2, wherein in the third step, 420 kilograms of cement are injected into each ring, and the injection is finished or stopped when the front half of each ring is tunneled, so as to accelerate the solidification of the synchronous slurry.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010451868.9A CN111577297A (en) | 2020-05-25 | 2020-05-25 | Deviation rectifying method for upward drifting of shield machine posture in upper-soft and lower-hard mudstone composite stratum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010451868.9A CN111577297A (en) | 2020-05-25 | 2020-05-25 | Deviation rectifying method for upward drifting of shield machine posture in upper-soft and lower-hard mudstone composite stratum |
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| CN202010451868.9A Pending CN111577297A (en) | 2020-05-25 | 2020-05-25 | Deviation rectifying method for upward drifting of shield machine posture in upper-soft and lower-hard mudstone composite stratum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065416A (en) * | 2020-10-24 | 2020-12-11 | 中铁一局集团有限公司 | Construction method for vertical deviation correction in shield tunneling |
| CN113047852A (en) * | 2021-04-09 | 2021-06-29 | 中交第三航务工程局有限公司 | Method for correcting shield posture in upper hard and lower soft stratum |
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| CN112065416A (en) * | 2020-10-24 | 2020-12-11 | 中铁一局集团有限公司 | Construction method for vertical deviation correction in shield tunneling |
| CN112065416B (en) * | 2020-10-24 | 2023-08-22 | 中铁一局集团有限公司 | Construction method for vertical deviation correction of shield tunneling |
| CN113047852A (en) * | 2021-04-09 | 2021-06-29 | 中交第三航务工程局有限公司 | Method for correcting shield posture in upper hard and lower soft stratum |
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