CN210798969U - Shield construction equipment suitable for waterless pebble geology - Google Patents
Shield construction equipment suitable for waterless pebble geology Download PDFInfo
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- CN210798969U CN210798969U CN201921289589.6U CN201921289589U CN210798969U CN 210798969 U CN210798969 U CN 210798969U CN 201921289589 U CN201921289589 U CN 201921289589U CN 210798969 U CN210798969 U CN 210798969U
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Abstract
The utility model discloses a shield constructs construction equipment suitable for no water floats cobble geology, including the shield constructs the quick-witted body, the shield constructs the quick-witted body and includes blade disc, anterior shield, well shield and tail shield, the anterior shield is provided with the pressure-bearing baffle, form the soil storehouse between pressure-bearing baffle and the blade disc, be provided with the slip casting mouth on the pressure-bearing baffle, through the fixed shotcrete pipe that stretches into in the soil storehouse of slip casting mouth. The guniting pipe is very convenient to install, a shield machine does not need to be changed too much, only holes are formed in the existing pressure-bearing partition plate, the guniting pipe is simple and convenient to use, and the guniting pipe is simple to manufacture. The beneficial effect of above-mentioned scheme does: the thick slurry injected into the soil bin can form a slurry isolation layer, so that the vibration and noise at the top of the shield tunneling machine are reduced, the foam and the moisture generated by the broken foam are limited in the soil body in front of the cutter head, the moisture is prevented from moving upwards, and the disturbance of the water-gas flushing on the soil body at the top is reduced; the thick mud can also effectively support the soil above the cutter head, and the soil is prevented from being peeled off.
Description
Technical Field
The utility model relates to the technical field, concretely relates to shield constructs construction equipment suitable for anhydrous cobble geology.
Background
When an earth pressure balance shield is used for penetrating through an ovolite stratum in the traditional method, super drainage is easy to occur, and ground settlement exceeds the standard and ground subsidence is caused for the following reasons:
(1) the inner friction angle of the cobble rock stratum is large, the cutter head is subjected to resistance when rotating, the torque is extremely high, severe disturbance is caused to soil bodies and ground buildings, the soil bodies on the top are loosened and peeled off, superdrainage is caused, and the ground is settled and collapsed.
(2) When the earth pressure balance shield machine is used for tunneling, pebbles are difficult to cut off, the actual excavation surface is far beyond the theoretical excavation surface, and superdrainage occurs.
(3) When the earth pressure balance shield tunnels in a sandy gravel stratum, foam is needed to be added to improve the soil body, the torque is reduced, gas is gathered at the top of the cutter head after foam is dissipated, and the stratum is repeatedly washed, so that soil and stones at the top are loosened and peeled off.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a shield constructs construction equipment suitable for anhydrous cobble geology, the deep settlement of effective control soil body reduces ground subsides.
The utility model provides a shield constructs construction equipment suitable for anhydrous cobble geology, including the shield constructs the quick-witted body, the shield constructs the quick-witted body and includes blade disc, anterior shield, well shield and tail shield, the anterior shield is provided with the pressure-bearing baffle, form the soil storehouse between pressure-bearing baffle and the blade disc, be provided with the slip casting mouth on the pressure-bearing baffle, through the fixed shotcrete pipe that stretches into in the soil storehouse of slip casting mouth. The guniting pipe is very convenient to install, a shield machine does not need to be changed too much, only holes are formed in the existing pressure-bearing partition plate, the guniting pipe is simple and convenient to use, and the guniting pipe is simple to manufacture.
The beneficial effects of the above technical scheme are: the thick slurry injected into the soil bin can form a slurry isolation layer, so that the vibration and noise at the top of the shield tunneling machine are reduced, the foam and the moisture generated by the broken foam are limited in the soil body in front of the cutter head, the moisture is prevented from moving upwards, and the disturbance of the water-gas flushing on the soil body at the top is reduced; the thick mud can also effectively support the soil above the cutter head, and the soil is prevented from being peeled off.
Furthermore, the grouting opening is formed in the position, close to the top end, of the pressure-bearing partition plate. The thick mud is conveniently injected into the upper space of the soil bin.
Further, the guniting pipe is welded to the pressure-bearing partition plate.
Furthermore, a fixed support is welded on one side, which is far away from the soil bin, of the pressure-bearing partition plate, an annular hoop is arranged on the fixed support, and the guniting pipe is fixed through the annular hoop.
Furthermore, a control valve is arranged on the guniting pipe, and the opening and closing of the guniting pipe and the flow rate are controlled through the control valve.
Furthermore, one side of the pressure-bearing partition plate, which faces the soil bin, is provided with a plurality of pressure sensors, and the pressure sensors are distributed at different heights of the pressure-bearing partition plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is an operation schematic diagram of embodiment 2 of the present invention;
fig. 3 is a flowchart of embodiment 2 of the present invention.
Reference numerals: the device comprises a cutter head 100, a front shield 200, a pressure-bearing partition plate 210, a guniting pipe 211, a pebble layer 300, thick mud 400 and a screw conveyor 500.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship as shown in the drawings for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media.
Example 1
As shown in fig. 1, the embodiment provides a shield construction equipment suitable for anhydrous boulder geology, including the shield structure machine body, the shield structure machine body includes blade disc 100, anterior shield 200, well shield and tail shield, anterior shield 200 is provided with pressure-bearing baffle 210, form the soil storehouse between pressure-bearing baffle 210 and the blade disc 100, be provided with the slip casting mouth on the pressure-bearing baffle 210, through the fixed shotcrete pipe 211 that stretches into in the soil storehouse of slip casting mouth. The installation process of the guniting pipe 211 is very convenient, the shield machine does not need to be changed too much, only holes are formed in the existing pressure-bearing partition plate 210, the installation process is simple and convenient, and the manufacturing of the guniting pipe 211 is simple. In order to fix the guniting pipe 211, the guniting pipe 211 is welded on the pressure-bearing partition plate 210 in a welding mode, in order to reduce the swinging of the guniting pipe 211, a fixing support is welded on one side, deviating from the soil bin, of the pressure-bearing partition plate 210, an annular hoop is arranged on the fixing support, and the guniting pipe 211 is fixed through the annular hoop.
Furthermore, in order to control the pressure of the bentonite in the soil bin, that is, in order to control the injection amount of the bentonite in the soil bin, a control valve is installed on the guniting pipe 211, and the opening and closing of the guniting pipe 211 and the flow rate are controlled by the control valve. In order to monitor the pressure in the soil bin, a pressure sensor is fixed on one side of the pressure-bearing partition plate 210 facing the soil bin, a plurality of pressure sensors are loaded on the pressure-bearing partition plate 210, and the plurality of pressure sensors are distributed at different heights of the pressure-bearing partition plate 210 and are used for detecting the pressures at different heights in the soil bin.
The grouting opening is arranged at a position of the pressure-bearing partition plate 210 close to the top end. It is convenient to inject the thick mud 400 into the upper space of the soil silo.
In order to enable the guniting pipe 211 to continuously guniting, a pumping system and a slurry fermentation device are additionally arranged in the shield tunneling machine, the pumping system is connected with the guniting pipe 211, and the bentonite fermented in the fermentation device is sprayed into a soil bin through the pumping system.
Example 2
As shown in fig. 1 to 3, the present embodiment discloses a shield construction method suitable for anhydrous pebble geology, including:
reducing the height of the pebble layer 300 in the soil bin; leaving a void for the following thick slurry 400. Specifically, the pebbles can be output in advance by adopting the screw conveyer 500, and a cavity is reserved at the top of the soil bin.
Additionally arranging a slurry injection system at the top of the soil bin, injecting thick slurry 400 into the soil bin through the slurry injection system, and adjusting the injection amount of the thick slurry 400 according to the change of the tunneling speed and the pressure: when the speed becomes fast or the pressure becomes small, the injection amount of the thick slurry 400 is increased, otherwise, the injection amount of the thick slurry 400 is decreased, and the top pressure is ensured to be stable.
The thick mud 400 injected into the soil bin can form a mud isolation layer, so that the vibration and noise at the top of the shield tunneling machine are reduced, the foam and the moisture generated by the foam breakage are limited in the soil body in front of the cutter head 100, the moisture is prevented from moving upwards, and the disturbance of the water-air flushing on the soil body at the top is reduced; the thick mud 400 can also effectively support the soil above the cutter head 100, and prevent the soil from peeling off. Furthermore, the injected thick slurry 400 can also reduce the torque of the cutter head 100, and has a protective effect on the cutter head 100.
The thick mud 400 is bentonite which is completely fermented. The bentonite has good viscosity and can form enough pressure.
The viscosity of the bentonite is greater than 50 seconds. So that the bentonite can form sufficient pressure.
The injected thick mud 400 fills the top of the silo to withstand the pressure of the excavated layer. Even if the soil layer is dug to be loose, the peeling-off can not be generated. The principle is as follows: the bentonite in the soil bin can timely and effectively fill the over-digging part above the shield tunneling machine and the boulder stripping cavity, effectively control deep settlement of a soil body, and reduce ground settlement.
The pressure formed by the thick mud 400 in the soil bin is not lower than 0.8 bar. In order to monitor the pressure in the soil bin, a pressure sensor is provided in the soil bin, and the injection amount of the thick mud 400 is adjusted by a value obtained by the pressure sensor.
The height of the pebble layer 300 in the soil bin does not exceed 5/6 of the whole height of the soil bin. For reserving a sufficient space for the thick matter 400.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (6)
1. The utility model provides a shield constructs construction equipment suitable for anhydrous cobble geology, includes the shield constructs the quick-witted body, the shield constructs the quick-witted body including blade disc (100), anterior shield (200), well shield and tail shield, anterior shield (200) are provided with pressure-bearing baffle (210), form the soil storehouse between pressure-bearing baffle (210) and blade disc (100), its characterized in that, be provided with the slip casting mouth on pressure-bearing baffle (210), through fixed shotcrete pipe (211) that stretch into in the soil storehouse of slip casting mouth.
2. The shield construction equipment suitable for the waterless pebble geology according to claim 1, wherein the grouting port is arranged at a position close to the top end of the pressure-bearing partition plate (210).
3. The shield construction equipment suitable for the waterless boulder geology according to claim 1, wherein the guniting pipe (211) is welded to a pressure-bearing partition plate (210).
4. The shield construction equipment suitable for the waterless boulder geology according to claim 1, characterized in that a fixing bracket is welded on one side of the pressure-bearing partition plate (210) away from the soil bin, an annular hoop is arranged on the fixing bracket, and the slurry spraying pipe (211) is fixed through the annular hoop.
5. The shield construction equipment suitable for the waterless pebble geology according to claim 1, wherein a control valve is installed on the guniting pipe (211), and the opening and closing of the guniting pipe (211) and the flow rate are controlled through the control valve.
6. The shield construction equipment suitable for the waterless boulder geology according to claim 1, characterized in that one side of the pressure-bearing partition plate (210) facing the soil bin is provided with a plurality of pressure sensors, and the pressure sensors are distributed at different heights of the pressure-bearing partition plate (210).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921289589.6U CN210798969U (en) | 2019-08-09 | 2019-08-09 | Shield construction equipment suitable for waterless pebble geology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921289589.6U CN210798969U (en) | 2019-08-09 | 2019-08-09 | Shield construction equipment suitable for waterless pebble geology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210798969U true CN210798969U (en) | 2020-06-19 |
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ID=71227391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921289589.6U Expired - Fee Related CN210798969U (en) | 2019-08-09 | 2019-08-09 | Shield construction equipment suitable for waterless pebble geology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210798969U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306993A (en) * | 2019-08-09 | 2019-10-08 | 中铁电气化局集团有限公司 | It is a kind of suitable for it is anhydrous and drift cobble geology shield construction method and equipment |
-
2019
- 2019-08-09 CN CN201921289589.6U patent/CN210798969U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306993A (en) * | 2019-08-09 | 2019-10-08 | 中铁电气化局集团有限公司 | It is a kind of suitable for it is anhydrous and drift cobble geology shield construction method and equipment |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200619 |
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| CF01 | Termination of patent right due to non-payment of annual fee |