CN111636882A - Shield tail sealing system of shield machine and control method - Google Patents
Shield tail sealing system of shield machine and control method Download PDFInfo
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- CN111636882A CN111636882A CN202010442241.7A CN202010442241A CN111636882A CN 111636882 A CN111636882 A CN 111636882A CN 202010442241 A CN202010442241 A CN 202010442241A CN 111636882 A CN111636882 A CN 111636882A
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- 238000007789 sealing Methods 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000005641 tunneling Effects 0.000 claims abstract description 34
- 239000004519 grease Substances 0.000 claims description 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 229910000639 Spring steel Inorganic materials 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000001680 brushing effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0635—Tail sealing means, e.g. used as end shuttering
Abstract
The application provides a shield tail sealing system of a shield tunneling machine and a control method, and the shield tail sealing system comprises four sealing brushes which are sequentially arranged on the inner wall of a shield tail, wherein the shield tail sealing brushes are pressed on a shield shell by duct pieces; the rear part of each sealing brush is provided with a fourth tail brush, and each fourth tail brush is pressed clockwise or anticlockwise to form a closed lap joint ring; the fourth tail brush and the sealing brush are connected with the duct piece in a sliding manner; the shield tail sealing system and the control method of the shield machine can be combined with possible reasons causing damage of the shield tail sealing system, and make feasible counter measures in a targeted mode, effectively protect the shield tail sealing system, and improve the sealing performance of the shield tail.
Description
Technical Field
The application relates to the technical field of shield tail sealing of shield tunneling machines, in particular to a shield tail sealing system of a shield tunneling machine and a control method.
Background
The shield construction carried out in a large range in China is generally urban subway construction with the diameter of about 6 meters, the buried depth is shallow, the water pressure is low, and the water pressure is generally not more than 3.5 bar. And for the construction of the large-diameter high-water-pressure shield tunnel, the problem of shield tail protection more severe than subway construction is faced: firstly, the larger the diameter of the shield machine is, the higher the requirement on the assembly quality of the pipe slices is, and the smaller the gap between the shield tails is; secondly, the depth of burial is deeper, the water pressure is large, and generally reaches 6.5bar or higher; thirdly, there is basically no need for maintenance and replacement of the tail brushes during underwater propulsion, and even if it is marginal, there is a great risk and high cost. Therefore, the control work of the high-water-pressure large shield tail sealing system is the most important.
The shield tail brush is formed by connecting a plurality of small tail brushes with the width of 20cm, the shield tail brushes are generally installed on site after the shield machine is assembled, and the overlapping sequence of spring steel plate bundles at the back of the tail brushes during installation is neglected in a plurality of construction sites, so that the steel plates on the tail brushes are not protected, but disordered, and the whole pressure resistance is greatly reduced.
Before assembling the negative duct piece, the sealing brush is manually coated with shield tail sealing grease, and if the grease is not uniformly coated or is not in place, a cavity is formed in the steel wire brush at the position to form a weak point of the whole shield tail seal, so that the shield tail seal is very easy to break down. In the tunneling process, the clearance between the shield tails is too large or too small, the posture of the shield tunneling machine deviates to one side of the axis of the tunnel, or the posture deviation is too fast, and the damage of the sealing brush is aggravated. The synchronous grouting management is out of control, the grouting pressure is too high, the grouting is full and uniform, and the pressure resistance of the shield tail seal is reduced rapidly until the shield tail seal is broken down.
In the propelling process with the length of more than 2Km, even if the preventive measures are best, the abrasion of the shield tail sealing brush is inevitable. The steel wire will gradually wear off or fall off, and a part of the protective spring steel plate on the inner layer and the outer layer will gradually fall off. The sealability of the shield tail is gradually reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a shield tail sealing system of a shield machine and a control method thereof, so as to achieve the beneficial effects of making feasible measures in a targeted manner, effectively protecting the shield tail sealing system and effectively protecting the shield tail sealing system.
As shown in fig. 1-6, the present application provides a shield tail sealing system of a shield tunneling machine, which comprises four sealing brushes sequentially arranged on the inner wall of a shield tail, wherein the shield tail sealing brushes are pressed on a shield shell by duct pieces; the rear part of each sealing brush is provided with a fourth tail brush, and each fourth tail brush is pressed clockwise or anticlockwise to form a closed lap joint ring; the fourth tail brush and the sealing brush are connected with the duct piece in a sliding manner; the shield tail is connected with the slurry stopping plate and the fourth tail brush, a grease sealing cavity is formed among the shield tail shell, the duct piece, the shield tail brush and the fourth tail brush, a sealing grease pipe is arranged inside the shield tail, a grease pump sends grease to the grease sealing cavity through the sealing grease pipe, and the gap between the duct piece and the shield shell is 30-50 mm; the grouting pipeline also comprises a standby grouting pipe.
And the three shield tail brushes close to the propulsion oil cylinder are fixedly connected with the shield tail by adopting fixing bolts, and the roots of the fixing bolts are planes.
A control method of a shield tail sealing system of a shield tunneling machine comprises the following steps:
the method comprises the following steps: installing a shield tail sealing brush;
step two: brushing oil on the inner wall of the shield tail and the sealing brush;
step three: keeping the posture of the shield tunneling machine to be pushed forward;
step four: controlling the grouting amount of the shield tail;
step five: monitoring and adjusting preset injection parameters of shield tail grease;
step six: manually supplementing shield tail grease;
step seven: the actual sealing effect of the shield tail is concerned.
Preferably, the first step further comprises: the first 3 sealing brushes are fixed by bolts, before installation, the roots of the bolts are polished flat by a reamer, and then the bolts are sequentially installed from bottom to top; the 4 th tail brush is fixed by welding; and a fourth tail brush at the rear part of each tail sealing brush is pressed together clockwise or anticlockwise during installation to form a closed lap joint ring.
Preferably, the second step further comprises: the method comprises the steps of manufacturing a plurality of plate-shaped units with preset lengths, separating steel plates and steel wires of a shield tail sealing brush and an intermediate steel wire mesh from the steel wires by the plate-shaped units, manually smearing shield tail sealing grease on the sealing brush before assembling pipe pieces, manually smearing shield tail grease on the inner side wall of a shield tail, and smearing grease with preset amount on the root of the whole sealing brush.
Preferably, step three further comprises: the shield machine is pushed forward close to the axis of the tunnel, and an operator needs to continuously adjust the advancing posture of the shield machine; according to the attitude of the shield tunneling machine and the actual measurement value of the shield tail clearance, duct pieces with preset sizes are selected, and the nonuniformity of the shield tail clearance is reduced; and when the advancing distance of the posture of the shield tunneling machine exceeds a preset distance, adopting the correction size adjustment of 3-5 mm.
Preferably, the fourth step further comprises: firstly, performing double control on grouting pressure and grouting quantity of a shield machine, and when the grouting pressure reaches a preset pressure value, adjusting the grouting quantity to enable the grouting quantity to reach the preset quantity, wherein grouting pipes are annularly arranged at the tail of a shield; controlling the grouting amount by referring to the preset grouting amount, and simultaneously controlling the grouting pressure: according to the preset grouting amount and the advancing stroke, the actual grouting amount is compared, and excessive grouting is prevented; secondly, closely paying attention to the pressure feedback value of the grouting pipeline, the grouting pressure should not exceed the external muddy water pressure and the pressure of shield tail sealing grease.
Preferably, step five further comprises: and (3) monitoring and adjusting the injection of shield tail grease in real time: the shield tail grease is conveyed into the grease sealing cavity by the grease pump through the grease pipe, the consumption of the grease can be rechecked after each ring of propelling, and the risk caused by the failure of the grease pump is reduced; the operator should check all the pressure sensor display values according to the preset duration, and when the operator finds that the pressure is lower, the operator should perform the preset amount of supplementary injection on the shield tail sealing grease.
Preferably, step six further comprises: and (3) periodically and manually supplementing shield tail grease: when the replenishment is carried out according to the preset duration, the replenishment is preferably carried out in a shutdown state, all the grease pipes are opened, and the replenishment is carried out for 5 to 10 minutes, or until the pressure of the fourth tail brush reaches 1 to 2bar higher than the water outlet pressure.
Preferably, step seven further comprises: the actual sealing effect of the shield tail is closely concerned: when the buried depth is increased by 5 meters, the tunneling distance is increased by 10 meters, the tail brush is worn by 2cm, a specially-assigned person is arranged to observe whether water leakage exists at the tail of the shield in the propelling process of each circle, the leakage of a little clear water in a preset time is a normal phenomenon, and once the water leakage occurs, grease at the leakage position needs to be injected more immediately; and the grease consumption per ring is increased by 2L with the increase of the advancing distance of the shield tunneling machine by 5 m.
The beneficial effect of this application lies in:
the shield tail sealing system and the control method of the shield machine can be combined with possible reasons causing damage of the shield tail sealing system, and make feasible counter measures in a targeted mode, effectively protect the shield tail sealing system, and improve the sealing performance of the shield tail.
In addition, the design principle of the application is reliable, the structure is simple, and the application prospect is very wide.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic illustration of the position of a tail seal system according to an embodiment of the present application.
Fig. 2 is a schematic diagram of the shield tail sealing system and the position of the thrust cylinder in one embodiment of the present application.
FIG. 3 is a schematic view of a shield tail sealing brush and shield tail grease injection line according to an embodiment of the present application.
FIG. 4 is a schematic diagram of a synchronous grouting line according to an embodiment of the present application.
FIG. 5 is a schematic view of the annular arrangement of grouting pipes in the shield according to an embodiment of the present application.
Fig. 6 is a detailed structure diagram of a shield tail sealing brush in an embodiment of the present application.
In the figure, 1, a propulsion oil cylinder, 2, a sealing grease pipe, 3, a first shield tail brush, 4, a second shield tail brush, 5, a third shield tail brush, 6, a fourth shield tail brush, 7, a grout stopping plate, 8 spring steel plate bundles, 9, a duct piece, 10, a first grease cavity, 11, a second grease cavity, 13, a third grease cavity, 14, a grouting pipeline, 15, a standby grouting pipe, 16 and a grouting pipeline channel.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following explains key terms appearing in the present application.
The shield tail sealing system of the shield tunneling machine comprises four sealing brushes which are sequentially arranged on the inner wall of a shield tail, wherein the shield tail sealing brushes are pressed on a shield shell by duct pieces; the rear portion of each sealing brush is provided with a spring steel plate bundle 8, and each spring steel plate bundle 8 presses one clockwise to form a closed lap joint ring, so that the leakage of muddy water can be reduced or avoided. In other embodiments, each steel plate bundle may be pressed together counterclockwise, also forming a lap ring.
In the propelling process of the shield tunneling machine, the spring steel plate bundle and the sealing brush are in sliding connection with the duct piece; the shield tail is connected with the slurry stopping plate 7 and the spring steel plate bundle 8, a grease sealing cavity is formed between the shield tail shell, the duct piece 9, the shield tail brush and the spring steel plate bundle 8, a sealing grease pipe is arranged inside the shield tail, a grease pump sends grease to the first grease sealing cavity 10, the second grease cavity 11 and the third grease cavity 13 through the sealing grease pipe 2, and the gap between the duct piece 9 and the shield shell is 30-50 mm; the shield tail is provided with a grouting pipeline 14 and a grouting pipeline channel 16, the grouting pipeline 14 further comprises a standby grouting pipe 15, and the grouting pipeline 14 and the standby grouting pipe 15 are both communicated with the grouting pipeline channel 16.
The three shield tail brushes close to the propulsion oil cylinder 1 are fixedly connected with the shield tail through fixing bolts, and the roots of the fixing bolts are planes. And a shield tail brush far away from the propulsion oil cylinder is fixed with the shield tail by welding.
The application also provides a control method of the shield tail sealing system of the shield tunneling machine, which comprises the following steps:
the method comprises the following steps: installing a shield tail sealing brush;
step two: brushing oil on the inner wall of the shield tail and the sealing brush;
step three: keeping the posture of the shield tunneling machine to be pushed forward;
step four: controlling the grouting amount of the shield tail;
step five: monitoring and adjusting preset injection parameters of shield tail grease;
step six: manually supplementing shield tail grease;
step seven: the actual sealing effect of the shield tail is concerned.
Wherein, step one still includes: as shown in fig. 1, the first tail brush 3, the second tail brush 4 and the third tail brush 5, the first 3 sealing brushes are fixed by bolts, before installation, the root of each bolt is ground by a reamer, and then the bolts are sequentially installed from bottom to top; the fourth tail brush 6 is fixed by welding; when being installed, the spring steel plate bundle at the rear part of each tail sealing brush presses one spring steel plate bundle clockwise or anticlockwise, and can be lapped in one direction only to form a closed lapping ring.
The second step further comprises: the method comprises the steps of manufacturing a plurality of plate-shaped units with preset lengths, separating steel plates and steel wires of a shield tail sealing brush and an intermediate steel wire mesh from the steel wires by the plate-shaped units, manually smearing shield tail sealing grease on the sealing brush before assembling pipe pieces, manually smearing shield tail grease on the inner side wall of a shield tail, and smearing grease with preset amount on the root of the whole sealing brush.
In addition, the quality supervision and acceptance of the duct piece need to be enhanced, and the flatness of the outer ring surface is strictly controlled; the damage in the hoisting and transporting process is reduced; if the damage is needed to be repaired, the quality requirement is ensured to be met.
The third step also comprises: the shield machine is enabled to be pushed forward close to the axis of the tunnel, an operator can adjust the advancing attitude of the shield machine according to detection data of various measurement elements when the shield machine advances in site construction, and various measurement systems refer to detection elements of the shield machine, and are not described again; according to the attitude of the shield tunneling machine and the actual measurement value of the shield tail clearance, duct pieces with preset sizes are selected, and the nonuniformity of the shield tail clearance is reduced; and when the advancing distance of the posture of the shield tunneling machine exceeds a preset distance, adopting the correction size adjustment of 3-5 mm.
In the actual adjustment process, after the correction is adopted, the effect is not necessarily obtained at that time, and the deviation may continue to increase because the deviation trend still exists and the deviation has not reached the peak value, and at this time, the speed of increasing the deviation is ensured to be reduced.
The fourth step also comprises: firstly, performing double control on the grouting pressure and the grouting amount of the shield machine, and when the grouting pressure reaches a preset pressure value, adjusting the grouting amount to enable the grouting amount to reach the preset amount, wherein the preset value of the grouting pressure and the preset value of the grouting amount are set according to the actual working process of the shield machine. The grouting pipes are annularly arranged at the tail of the shield; controlling the grouting amount by referring to the preset grouting amount, and simultaneously controlling the grouting pressure: according to the preset grouting amount and the advancing stroke, the actual grouting amount is compared, and excessive grouting is prevented; secondly, closely paying attention to the pressure feedback value of the grouting pipeline, the grouting pressure should not exceed the external muddy water pressure and the pressure of shield tail sealing grease.
In the actual operation process, even if the grouting amount of the individual rings exceeds the preset amount, the grouting pressure is lower than the preset value, the grouting amount can be increased as long as the pressure does not exceed the shield tail pressure resistance according to pressure control.
The fifth step also comprises: and (3) monitoring and adjusting the injection of shield tail grease in real time: the shield tail grease is conveyed into each grease sealing cavity by the grease pump through the grease pipe, the consumption of the grease can be rechecked after each ring of propelling, and the risk caused by the failure of the grease pump is reduced; considering the grease loss in the high water pressure, large buried depth environment, the propulsion or shutdown state, etc., there may be a partial shield tail, and the grease pressure drops to a state close to or even less than the water pressure. The operator should check all the pressure sensor display values according to the preset duration, and when the operator finds that the pressure is lower, the operator should perform the preset amount of supplementary injection on the shield tail sealing grease.
Step six also includes: and (3) periodically and manually supplementing shield tail grease: when the replenishment is carried out according to the preset duration, the replenishment is preferably carried out in a shutdown state, all the grease pipes are opened, and the replenishment is carried out for 5 to 10 minutes, or until the pressure of the fourth tail brush reaches 1 to 2bar higher than the water outlet pressure.
The seventh step also comprises: the actual sealing effect of the shield tail is closely concerned: when the buried depth is increased by 5 meters, the tunneling distance is increased by 10 meters, the tail brush is worn by 2cm, a specially-assigned person is arranged to observe whether water leakage exists at the tail of the shield in the propelling process of each circle, the leakage of a little clear water in a preset time is a normal phenomenon, and once the water leakage occurs, grease at the leakage position needs to be injected more immediately; and the grease consumption per ring is increased by 2L with the increase of the advancing distance of the shield tunneling machine by 5 m.
The shield tail sealing system and the control method of the shield machine can be combined with possible reasons causing damage of the shield tail sealing system, and make feasible counter measures in a targeted mode, effectively protect the shield tail sealing system, and improve the sealing performance of the shield tail.
Although the present application has been described in detail with reference to the accompanying drawings in conjunction with the preferred embodiments, the present application is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application, and these modifications or substitutions are intended to be covered by the present application/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a shield machine shield tail sealing system which characterized in that: the shield tail sealing brush comprises four sealing brushes which are sequentially arranged on the inner wall of a shield tail, wherein the shield tail sealing brushes are pressed on a shield shell by duct pieces; the rear part of each sealing brush is provided with a spring steel plate bundle, and each spring steel plate bundle presses one spring steel plate bundle clockwise or anticlockwise to form a closed lap joint ring; the spring steel plate bundle and the sealing brush are both connected with the duct piece in a sliding manner; the shield tail is connected with the slurry stopping plate and the spring steel plate bundle, a grease sealing cavity is formed among the shield tail shell, the duct piece, the shield tail brush and the spring steel plate bundle, a sealing grease pipe is arranged inside the shield tail, a grease pump sends grease to the grease sealing cavity through the sealing grease pipe, and the gap between the duct piece and the shield shell is 30-50 mm; the grouting pipeline also comprises a standby grouting pipe.
2. The shield tail sealing system of the shield tunneling machine of claim 1, wherein: and the three shield tail brushes close to the propulsion oil cylinder are fixedly connected with the shield tail by adopting fixing bolts, and the roots of the fixing bolts are planes.
3. A control method for a shield tail sealing system of a shield tunneling machine according to any one of claims 1-2, comprising the steps of:
the method comprises the following steps: installing a shield tail sealing brush;
step two: brushing oil on the inner wall of the shield tail and the sealing brush;
step three: keeping the posture of the shield tunneling machine to be pushed forward;
step four: controlling the grouting amount of the shield tail;
step five: monitoring and adjusting preset injection parameters of shield tail grease;
step six: manually supplementing shield tail grease;
step seven: the actual sealing effect of the shield tail is concerned.
4. A control method of the shield tail sealing system of the shield tunneling machine according to claim 3, wherein: the first step further comprises the following steps: the first 3 sealing brushes are fixed by bolts, before installation, the roots of the bolts are polished flat by a reamer, and then the bolts are sequentially installed from bottom to top; the fourth tail brush is fixed by welding; when being installed, the spring steel plate bundles at the rear part of each tail sealing brush are pressed together clockwise or anticlockwise to form a closed lap joint ring.
5. A control method of the shield tail sealing system of the shield tunneling machine according to claim 3, wherein: the second step further comprises: the method comprises the steps of manufacturing a plurality of plate-shaped units with preset lengths, separating steel plates and steel wires of a shield tail sealing brush and an intermediate steel wire mesh from the steel wires by the plate-shaped units, manually smearing shield tail sealing grease on the sealing brush before assembling pipe pieces, manually smearing shield tail grease on the inner side wall of a shield tail, and smearing grease with preset amount on the root of the whole sealing brush.
6. A control method of the shield tail sealing system of the shield tunneling machine according to claim 3, wherein: the third step also comprises: the shield machine is pushed forward close to the axis of the tunnel, and an operator needs to continuously adjust the advancing posture of the shield machine; according to the attitude of the shield tunneling machine and the actual measurement value of the shield tail clearance, duct pieces with preset sizes are selected, and the nonuniformity of the shield tail clearance is reduced; and when the advancing distance of the posture of the shield tunneling machine exceeds a preset distance, adopting the correction size adjustment of 3-5 mm.
7. A control method of the shield tail sealing system of the shield tunneling machine according to claim 3, wherein: the fourth step also comprises: firstly, performing double control on grouting pressure and grouting quantity of a shield machine, and when the grouting pressure reaches a preset pressure value, adjusting the grouting quantity to enable the grouting quantity to reach the preset quantity, wherein grouting pipes are annularly arranged at the tail of a shield; controlling the grouting amount by referring to the preset grouting amount, and simultaneously controlling the grouting pressure: according to the preset grouting amount and the advancing stroke, the actual grouting amount is compared, and excessive grouting is prevented; secondly, closely paying attention to the pressure feedback value of the grouting pipeline, the grouting pressure should not exceed the external muddy water pressure and the pressure of shield tail sealing grease.
8. A control method of the shield tail sealing system of the shield tunneling machine according to claim 3, wherein: the fifth step also comprises: and (3) monitoring and adjusting the injection of shield tail grease in real time: the shield tail grease is conveyed into the grease sealing cavity by the grease pump through the grease pipe, the consumption of the grease can be rechecked after each ring of propelling, and the risk caused by the failure of the grease pump is reduced; the operator should check all the pressure sensor display values according to the preset duration, and when the operator finds that the pressure is lower, the operator should perform the preset amount of supplementary injection on the shield tail sealing grease.
9. A control method of the shield tail sealing system of the shield tunneling machine according to claim 3, wherein: step six also includes: and (3) periodically and manually supplementing shield tail grease: when the replenishment is carried out according to the preset duration, the replenishment is preferably carried out in a shutdown state, all the grease pipes are opened, and the replenishment is carried out for 5 to 10 minutes, or until the pressure of the fourth tail brush reaches 1 to 2bar higher than the water outlet pressure.
10. A control method of the shield tail sealing system of the shield tunneling machine according to claim 3, wherein: the seventh step also comprises: the actual sealing effect of the shield tail is closely concerned: when the buried depth is increased by 5 meters, the tunneling distance is increased by 10 meters, the tail brush is worn by 2cm, a specially-assigned person is arranged to observe whether water leakage exists at the tail of the shield in the propelling process of each circle, the leakage of a little clear water in a preset time is a normal phenomenon, and once the water leakage occurs, grease at the leakage position needs to be injected more immediately; and the grease consumption per ring is increased by 2L with the increase of the advancing distance of the shield tunneling machine by 5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010442241.7A CN111636882A (en) | 2020-05-22 | 2020-05-22 | Shield tail sealing system of shield machine and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010442241.7A CN111636882A (en) | 2020-05-22 | 2020-05-22 | Shield tail sealing system of shield machine and control method |
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| CN111636882A true CN111636882A (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010442241.7A Pending CN111636882A (en) | 2020-05-22 | 2020-05-22 | Shield tail sealing system of shield machine and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931642A (en) * | 2021-11-12 | 2022-01-14 | 中国水利水电第四工程局有限公司 | Temporary treatment method for water leakage and sand leakage of shield tail of earth pressure balance shield machine |
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2020
- 2020-05-22 CN CN202010442241.7A patent/CN111636882A/en active Pending
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|---|---|---|---|---|
| US4139989A (en) * | 1976-07-29 | 1979-02-20 | Edmund Nuttall Limited | Seals for tunnelling shields |
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| CN102562081A (en) * | 2012-03-15 | 2012-07-11 | 中交天和机械设备制造有限公司 | Shield tail sealing device for shield machine |
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| CN113931642A (en) * | 2021-11-12 | 2022-01-14 | 中国水利水电第四工程局有限公司 | Temporary treatment method for water leakage and sand leakage of shield tail of earth pressure balance shield machine |
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Application publication date: 20200908 |
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