CN110847933A - Method for preventing and controlling tunnel vault from being hollow - Google Patents
Method for preventing and controlling tunnel vault from being hollow Download PDFInfo
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- CN110847933A CN110847933A CN201910950413.9A CN201910950413A CN110847933A CN 110847933 A CN110847933 A CN 110847933A CN 201910950413 A CN201910950413 A CN 201910950413A CN 110847933 A CN110847933 A CN 110847933A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005086 pumping Methods 0.000 claims abstract description 166
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 65
- 239000010959 steel Substances 0.000 claims abstract description 65
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 52
- 238000003466 welding Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 239000011800 void material Substances 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000004064 recycling Methods 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
- 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for preventing and treating tunnel vault from being hollow, which comprises the following steps: 1) binding a first layer of steel bars on the outer ring of the tunnel lining, and welding a plurality of positioning steel bar rings below the first layer of steel bars; 2) the positioning reinforcing steel bar ring is sleeved on the pumping pipe to suspend and position the pumping pipe below the first layer of reinforcing steel bars, a lining second layer of reinforcing steel bars are bound and lined below the first layer of reinforcing steel bars, and a second lining reinforcing steel bar template is installed; 3) and pouring concrete from the bottom to the vault upwards, pumping the concrete into the pumping pipe, slowly pumping out the pumping pipe after the concrete is filled into the pumping pipe, continuously pumping the concrete in the pumping-out process until the pumping pipe is completely pumped out, and thus finishing the dense filling of the top of the tunnel vault. The method has the characteristics of simple and convenient construction, reliable quality, repeated utilization of pumping pipes, realization of one-time construction in place, effective prevention of tunnel cavity formation without the need of post-grouting, and the like.
Description
Technical Field
The invention belongs to the field of tunnel lining. More particularly, the invention relates to a method for preventing and controlling the crown of a tunnel from being hollow.
Background
The vault emptying of the tunnel lining is one of important contents for controlling the tunnel construction quality, and the vault emptying is not processed in time, so that serious influence is brought to operation. In order to prevent the tunnel vault from being empty, a hole is reserved in the center line of the vault of the lining formwork for grouting in the traditional construction method, but the grouting is performed from bottom to top, the bottom of the grout can be filled up firstly under the action of self weight, and then the grout is filled up, and the top of the vault cannot be filled compactly due to poor flowability of concrete. The defects of holes, incompact and the like appear in the nondestructive testing process, the treatment is needed, the treatment cost is high, and particularly, the diseases caused by back void in the operation stage are more difficult to cure.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
It is still another object of the present invention to provide a method for preventing the collapse of a tunnel vault, which can prevent the collapse of the tunnel vault during the casting process.
To achieve these objects and other advantages in accordance with the present invention, there is provided a method for preventing the crown of a tunnel from being emptied, comprising the steps of:
1) binding a first layer of steel bars on the outer ring of the tunnel lining, and welding a plurality of positioning steel bar rings below the first layer of steel bars;
2) the positioning reinforcing steel bar ring is sleeved on the pumping pipe to suspend and position the pumping pipe below the first layer of reinforcing steel bars, a lining second layer of reinforcing steel bars are bound and lined below the first layer of reinforcing steel bars, and a second lining reinforcing steel bar template is installed;
3) and pouring concrete from the bottom to the top of the vault by a conventional method, pumping the concrete into the pumping pipe, slowly pumping out the pumping pipe after the concrete is filled into the pumping pipe, and continuously pumping the concrete in the pumping process until the pumping pipe is completely pumped out, namely finishing the dense filling of the top of the tunnel vault.
Preferably, the positioning reinforcing ring is welded on the first layer of reinforcing steel bars at the central line position of the top of the cave. The positioning reinforcing steel bar ring is welded at the center line position of the top of the tunnel, so that concrete pumped out by the pumping pipe uniformly falls into a top void part, and the void phenomenon is avoided.
Preferably, the number of the positioning reinforcing steel bar rings is more than or equal to 3. Through setting up a plurality of location reinforcing bars rings, increased the stability of pumping pipe.
Preferably, the ends of the two ends of the first layer of steel bars are respectively provided with a positioning reinforcing ring, and the middle of the first layer of steel bars is provided with a positioning reinforcing ring. Through setting up location reinforcing ring at the end for the pumping pipe can be fixed a position in the end position department of tunnel vault, makes can accomplish pouring of end part vault, avoids the end part to appear the phenomenon of coming to nothing.
Preferably, a pressure detection device is arranged in the pumping pipe to detect the pressure change of the concrete in the pumping pipe in real time.
Preferably, when the pressure detection device detects that the pressure in the pumping pipe is greater than the set value P1, the pumping speed of the pumping pipe is increased; when the pressure detection device detects that the pressure in the pumping pipe is less than the set value P2, the pumping speed of the pumping pipe is reduced. When the concrete pumped out by the pumping pipe completely fills the gap in front of the pipe orifice of the pumping pipe, the output of the concrete in the pumping pipe is blocked, and the change of the pressure in the pumping pipe is caused, so that whether the vault position is densely filled or not can be displayed by monitoring the pressure in the pipeline of the pumping pipe.
Preferably, a strip-shaped pressure sensing gasket is arranged at the central line position of the arch crown of the tunnel, the length of the strip-shaped pressure sensing gasket is the same as that of the arch crown of the tunnel, the pressure sensing gasket is connected with an electric cabinet so as to read the pressure of the strip-shaped pressure sensing gasket through the electric cabinet, the electric cabinet displays the pressure sensed by the strip-shaped pressure sensing gasket at different positions in real time, and when the pressure value of the strip-shaped pressure sensing gasket reaches a preset value, the pumping pipe is slowly pumped out.
The invention at least comprises the following beneficial effects: according to the invention, the pumping pipe is installed after the first layer of steel bars are bound, then the pumping pipe is used for pumping and filling the cavity of the vault of the tunnel tightly after the concrete is poured to the vault, and then the pumping pipe can be gradually withdrawn in the pumping process, so that the recycling of the pumping pipe and the tight filling of the vault are realized; the end heads at the two ends of the first layer of steel bars are respectively provided with a positioning steel bar ring for suspending and fixing the pumping pipe, and the pumping pipe is continuously drawn out in the pouring process, so that the pouring of the arch crown from one end to the other end is realized, and the head part of the arch crown is prevented from being empty. The method has the characteristics of simple and convenient construction, reliable quality, repeated utilization of pumping pipes, realization of one-time construction in place, effective prevention of tunnel cavity formation without the need of post-grouting, and the like.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic cross-sectional structural view of a dome structure of the present invention;
fig. 2 illustrates a longitudinal structural view of the dome structure.
1. Pumping the pipe; 2. a second layer of steel reinforcement; 3. a first layer of steel reinforcement; 4. positioning the reinforcing steel bar ring; 5. two lining steel bar templates.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1
As shown in fig. 1-2, a method for preventing the vault of a tunnel from being emptied includes the following steps:
1) binding a first layer of steel bars 3 on the outer ring of the tunnel lining, and welding a plurality of positioning steel bar rings 4 below the first layer of steel bars 3;
2) the positioning reinforcing steel bar ring 4 is sleeved on the pumping pipe 1 so as to suspend and position the pumping pipe 1 below the first layer of reinforcing steel bars 3, a lining second layer of reinforcing steel bars 2 are bound below the first layer of reinforcing steel bars 3, and a second lining reinforcing steel bar template 5 is installed;
3) and pouring concrete from the bottom to the top of the vault by a conventional method, pumping the concrete into the pumping pipe 1, slowly pumping out the pumping pipe 1 after the concrete is filled into the pumping pipe, and continuously pumping the concrete in the pumping-out process until the pumping pipe 1 is completely pumped out, namely finishing the dense filling of the top of the tunnel vault.
Example 2
As shown in fig. 1-2, a method for preventing the vault of a tunnel from being emptied includes the following steps:
1) binding a first layer of steel bars 3 on the outer ring of the tunnel lining, welding a plurality of positioning steel bar rings 4 below the first layer of steel bars 3, and welding the positioning steel bar rings 4 on the first layer of steel bars 3 at the center line position of the tunnel roof;
2) the positioning reinforcing steel bar ring 4 is sleeved on the pumping pipe 1 so as to suspend and position the pumping pipe 1 below the first layer of reinforcing steel bars 3, a lining second layer of reinforcing steel bars 2 are bound below the first layer of reinforcing steel bars 3, and a second lining reinforcing steel bar template 5 is installed;
3) and pouring concrete from the bottom to the top of the vault, pumping the concrete into the pumping pipe 1, slowly pumping out the pumping pipe 1 after the concrete is filled into the pumping pipe, and continuously pumping the concrete in the pumping-out process until the pumping pipe 1 is completely pumped out, namely finishing the dense filling of the top of the tunnel vault.
The positioning reinforcing steel bar ring 4 is welded at the center line position of the top of the tunnel, so that concrete pumped out by the pumping pipe 1 uniformly falls into a top void part, and the void phenomenon is avoided.
Example 3
As shown in fig. 1-2, a method for preventing the vault of a tunnel from being emptied includes the following steps:
1) binding a first layer of steel bars 3 on the outer ring of the tunnel lining, welding a plurality of positioning steel bar rings 4 below the first layer of steel bars 3, welding the positioning steel bar rings 4 on the first layer of steel bars 3 at the center line position of the tunnel roof, wherein the number of the positioning steel bar rings 4 is 3, each of the ends of two ends of the first layer of steel bars 3 is provided with one positioning steel bar ring 4, and one positioning steel bar ring 4 is arranged in the middle of the first layer of steel bars;
2) the positioning reinforcing steel bar ring 4 is sleeved on the pumping pipe 1 so as to suspend and position the pumping pipe 1 below the first layer of reinforcing steel bars 3, a lining second layer of reinforcing steel bars 2 are bound below the first layer of reinforcing steel bars 3, and a second lining reinforcing steel bar template 5 is installed;
3) and pouring concrete from the bottom to the top of the vault, pumping the concrete into the pumping pipe 1, slowly pumping out the pumping pipe 1 after the concrete is filled into the pumping pipe, and continuously pumping the concrete in the pumping-out process until the pumping pipe 1 is completely pumped out, namely finishing the dense filling of the top of the tunnel vault.
The stability of the pumping pipe 1 is improved by arranging a plurality of positioning reinforcing steel bar rings 4; through setting up location reinforcing ring 4 at the end for pumping pipe 1 can be fixed a position in the end position department of tunnel vault, makes can accomplish pouring of end part vault, avoids the end part to appear the phenomenon of coming to nothing.
Example 4
As shown in fig. 1-2, a method for preventing the vault of a tunnel from being emptied includes the following steps:
1) binding a first layer of steel bars 3 on the outer ring of the tunnel lining, welding a plurality of positioning steel bar rings 4 below the first layer of steel bars 3, welding the positioning steel bar rings 4 on the first layer of steel bars 3 at the center line position of the top of the tunnel, wherein the number of the positioning steel bar rings 4 is 3, each of the two ends of the first layer of steel bars 3 is provided with one positioning steel bar ring 4, the middle of the first layer of steel bars is provided with one positioning steel bar ring 4, and the pumping pipe 1 is provided with a pressure detection device for detecting the pressure change of concrete in the pumping pipe 1 in real time, wherein when the pressure detection device detects that the pressure in the pumping pipe 1 is greater than a set value P1, the pumping speed of the pumping pipe 1 is increased; when the pressure detection device detects that the pressure in the pumping pipe 1 is less than the set value P2, the pumping speed of the pumping pipe 1 is reduced;
2) the positioning reinforcing steel bar ring 4 is sleeved on the pumping pipe 1 so as to suspend and position the pumping pipe 1 below the first layer of reinforcing steel bars 3, a lining second layer of reinforcing steel bars 2 are bound below the first layer of reinforcing steel bars 3, and a second lining reinforcing steel bar template 5 is installed;
3) and pouring concrete from the bottom to the top of the vault, pumping the concrete into the pumping pipe 1, slowly pumping out the pumping pipe 1 after the concrete is filled into the pumping pipe, and continuously pumping the concrete in the pumping-out process until the pumping pipe 1 is completely pumped out, namely finishing the dense filling of the top of the tunnel vault.
When the concrete pumped out by the pumping pipe 1 completely fills the gap in front of the pipe orifice of the pumping pipe 1, the output of the concrete in the pumping pipe 1 is blocked, and the change of the pressure in the pumping pipe 1 is caused, so that whether the vault position is densely filled or not can be displayed by monitoring the pressure in the pipeline of the pumping pipe 1.
Example 5
As shown in fig. 1-2, a method for preventing the vault of a tunnel from being emptied includes the following steps:
1) binding a first layer of steel bars 3 on an outer ring of a tunnel lining, welding a plurality of positioning steel bar rings 4 below the first layer of steel bars 3, welding the positioning steel bar rings 4 on the first layer of steel bars 3 at the center line position of a tunnel roof, wherein the number of the positioning steel bar rings 4 is 3, each of the ends of the two ends of the first layer of steel bars 3 is provided with one positioning steel bar ring 4, the middle of the first layer of steel bars is provided with one positioning steel bar ring 4, the center line position of the tunnel vault is provided with a strip-shaped pressure sensing gasket, the length of the strip-shaped pressure sensing gasket is the same as that of the tunnel vault, the pressure sensing gasket is connected with an electric cabinet to read the pressure of the strip-shaped pressure sensing gasket through the electric cabinet, the electric cabinet displays the pressure sensed by the strip-shaped pressure sensing gasket at different positions in real time, and when the pressure value of the strip-shaped pressure sensing, slowly withdrawing the pumping pipe 1;
2) the positioning reinforcing steel bar ring 4 is sleeved on the pumping pipe 1 so as to suspend and position the pumping pipe 1 below the first layer of reinforcing steel bars 3, a lining second layer of reinforcing steel bars 2 are bound below the first layer of reinforcing steel bars 3, and a second lining reinforcing steel bar template 5 is installed;
3) and pouring concrete from the bottom to the top of the vault, pumping the concrete into the pumping pipe 1, slowly pumping out the pumping pipe 1 after the concrete is filled into the pumping pipe, and continuously pumping the concrete in the pumping-out process until the pumping pipe 1 is completely pumped out, namely finishing the dense filling of the top of the tunnel vault.
Example 6
As shown in fig. 1-2, a method for preventing the vault of a tunnel from being emptied includes the following steps:
1) binding a first layer of steel bars 3 on the outer ring of the tunnel lining, welding a plurality of positioning steel bar rings 4 below the first layer of steel bars 3, welding the positioning steel bar rings 4 on the first layer of steel bars 3 at the center line position of the top of the tunnel, wherein the number of the positioning steel bar rings 4 is 3, each of the two ends of the first layer of steel bars 3 is provided with one positioning steel bar ring 4, the middle of the first layer of steel bars is provided with one positioning steel bar ring 4, and the pumping pipe 1 is provided with a pressure detection device for detecting the pressure change of concrete in the pumping pipe 1 in real time, wherein when the pressure detection device detects that the pressure in the pumping pipe 1 is greater than a set value P1, the pumping speed of the pumping pipe 1 is increased; when the pressure detection device detects that the pressure in the pumping pipe 1 is less than the set value P2, the pumping speed of the pumping pipe 1 is reduced; the device comprises a tunnel vault and an electric cabinet, and is characterized in that a strip pressure sensing gasket is arranged at the central line position of the tunnel vault, the length of the strip pressure sensing gasket is the same as that of the tunnel vault, the pressure sensing gasket is connected with the electric cabinet so as to read the pressure of the strip pressure sensing gasket through the electric cabinet, the electric cabinet displays the pressure sensed by the strip pressure sensing gasket at different positions in real time, and when the pressure value of the strip pressure sensing gasket reaches a preset value, the pumping pipe 1 is slowly drawn out;
2) the positioning reinforcing steel bar ring 4 is sleeved on the pumping pipe 1 so as to suspend and position the pumping pipe 1 below the first layer of reinforcing steel bars 3, a lining second layer of reinforcing steel bars 2 are bound below the first layer of reinforcing steel bars 3, and a second lining reinforcing steel bar template 5 is installed;
3) and pouring concrete from the bottom to the top of the vault, pumping the concrete into the pumping pipe 1, slowly pumping out the pumping pipe 1 after the concrete is filled into the pumping pipe, and continuously pumping the concrete in the pumping-out process until the pumping pipe 1 is completely pumped out, namely finishing the dense filling of the top of the tunnel vault.
When the pressure in the pumping pipe 1 is greater than a preset value p1 and the pressure sensed by the strip pressure sensing gasket reaches a preset value, indicating that the vault is completely and compactly filled, and slowly pumping out the pumping pipe 1; when the pressure in the pumping pipe 1 is greater than a preset value p1 and the pressure sensed by the strip pressure sensing gasket does not reach a preset value, the pumping of the pumping pipe 1 is suspended, if the pressure sensed by the strip pressure sensing gasket is normal, the situation that the pumping pipe 1 is possibly blocked or the pumping device is possibly broken to reduce the output quantity of the pumping pipe 1 in unit time is indicated, and if the pressure sensed by the strip pressure sensing gasket does not reach the preset value, the situation that the blocking of the pumping pipe 1 and the failure of the pumping device are discharged is indicated that the strip pressure sensing gasket is possibly broken; when the pressure in the pumping pipe 1 is less than P2 and the pressure sensed by the strip pressure sensing gasket does not reach a preset value, the pumping speed of the pumping pipe 1 is too high, and the pumping speed of the pumping pipe 1 is reduced; when the pressure in the pumping pipe 1 is less than P2 and the pressure sensed by the strip pressure sensing gasket reaches a preset value, it indicates that there may be a situation that the dome is still fully filled, at this time, the pumping of the pumping pipe 1 is suspended until the pressure in the pumping pipe 1 is greater than P2, and then the pumping pipe 1 is slowly pumped.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (7)
1. A method for preventing the vault of a tunnel from being emptied is characterized by comprising the following steps:
1) binding a first layer of steel bars on the outer ring of the tunnel lining, and welding a plurality of positioning steel bar rings below the first layer of steel bars;
2) the positioning reinforcing steel bar ring is sleeved on the pumping pipe to suspend and position the pumping pipe below the first layer of reinforcing steel bars, a lining second layer of reinforcing steel bars are bound and lined below the first layer of reinforcing steel bars, and a second lining reinforcing steel bar template is installed;
3) and pouring concrete from the bottom to the vault upwards, pumping the concrete into the pumping pipe, slowly pumping out the pumping pipe after the concrete is filled into the pumping pipe, continuously pumping the concrete in the pumping-out process until the pumping pipe is completely pumped out, and thus finishing the dense filling of the top of the tunnel vault.
2. A method of controlling the collapse of a tunnel vault as claimed in claim 1 wherein said positioning rebar ring is welded to the first layer of rebar at the centerline of the vault.
3. The method for preventing and treating tunnel vault from being emptied according to claim 1, wherein the number of the positioning reinforcing steel bar rings is more than or equal to 3.
4. A method as claimed in claim 3, wherein the ends of the first layer of reinforcing bars are each provided with a positioning reinforcing ring, and the middle of the first layer of reinforcing bars is provided with a positioning reinforcing ring.
5. The method for preventing and treating tunnel vault emptying according to claim 1, wherein a pressure detection device is provided in said pumping pipe to detect the pressure change of concrete in the pumping pipe in real time.
6. The method for preventing and treating tunnel vault emptying according to claim 5, characterized in that when the pressure detection device detects that the pressure in the pumping pipe is greater than the set value P1, the pumping speed of the pumping pipe is increased; when the pressure detection device detects that the pressure in the pumping pipe is less than the set value P2, the pumping speed of the pumping pipe is reduced.
7. The method for preventing and treating tunnel vault from being emptied according to claim 1, wherein a strip pressure sensing gasket is arranged at a central line position of the tunnel vault, the length of the strip pressure sensing gasket is the same as that of the tunnel vault, the pressure sensing gasket is connected with an electric cabinet so as to read the pressure of the strip pressure sensing gasket through the electric cabinet, the electric cabinet displays the pressure sensed by the strip pressure sensing gasket at different positions in real time, and when the pressure value of the strip pressure sensing gasket reaches a preset value, the pumping pipe is slowly pumped out.
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|---|---|---|---|
| CN201910950413.9A CN110847933B (en) | 2019-10-08 | 2019-10-08 | Method for preventing and controlling tunnel vault from being hollow |
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| CN201910950413.9A CN110847933B (en) | 2019-10-08 | 2019-10-08 | Method for preventing and controlling tunnel vault from being hollow |
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| CN110847933B CN110847933B (en) | 2021-07-13 |
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| CN108661671A (en) * | 2018-05-16 | 2018-10-16 | 中铁十七局集团第三工程有限公司 | Tunnel vault two serves as a contrast concrete vacuum and assists pouring procedure |
| CN109682503A (en) * | 2019-01-11 | 2019-04-26 | 中铁十一局集团第四工程有限公司 | A kind of tunnel double-lining concrete pressure monitoring system and its application method |
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